Mercurial > hg > truffle
annotate src/share/vm/opto/library_call.cpp @ 3255:5d046bf49ce7
Merge
| author | johnc |
|---|---|
| date | Thu, 14 Apr 2011 13:45:41 -0700 |
| parents | 13bc79b5c9c8 59766fd005ff |
| children | edd9b016deb6 |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
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2 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/systemDictionary.hpp" | |
| 27 #include "classfile/vmSymbols.hpp" | |
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28 #include "compiler/compileBroker.hpp" |
| 1972 | 29 #include "compiler/compileLog.hpp" |
| 30 #include "oops/objArrayKlass.hpp" | |
| 31 #include "opto/addnode.hpp" | |
| 32 #include "opto/callGenerator.hpp" | |
| 33 #include "opto/cfgnode.hpp" | |
| 34 #include "opto/idealKit.hpp" | |
| 35 #include "opto/mulnode.hpp" | |
| 36 #include "opto/parse.hpp" | |
| 37 #include "opto/runtime.hpp" | |
| 38 #include "opto/subnode.hpp" | |
| 39 #include "prims/nativeLookup.hpp" | |
| 40 #include "runtime/sharedRuntime.hpp" | |
| 0 | 41 |
| 42 class LibraryIntrinsic : public InlineCallGenerator { | |
| 43 // Extend the set of intrinsics known to the runtime: | |
| 44 public: | |
| 45 private: | |
| 46 bool _is_virtual; | |
| 47 vmIntrinsics::ID _intrinsic_id; | |
| 48 | |
| 49 public: | |
| 50 LibraryIntrinsic(ciMethod* m, bool is_virtual, vmIntrinsics::ID id) | |
| 51 : InlineCallGenerator(m), | |
| 52 _is_virtual(is_virtual), | |
| 53 _intrinsic_id(id) | |
| 54 { | |
| 55 } | |
| 56 virtual bool is_intrinsic() const { return true; } | |
| 57 virtual bool is_virtual() const { return _is_virtual; } | |
| 58 virtual JVMState* generate(JVMState* jvms); | |
| 59 vmIntrinsics::ID intrinsic_id() const { return _intrinsic_id; } | |
| 60 }; | |
| 61 | |
| 62 | |
| 63 // Local helper class for LibraryIntrinsic: | |
| 64 class LibraryCallKit : public GraphKit { | |
| 65 private: | |
| 66 LibraryIntrinsic* _intrinsic; // the library intrinsic being called | |
| 67 | |
| 68 public: | |
| 69 LibraryCallKit(JVMState* caller, LibraryIntrinsic* intrinsic) | |
| 70 : GraphKit(caller), | |
| 71 _intrinsic(intrinsic) | |
| 72 { | |
| 73 } | |
| 74 | |
| 75 ciMethod* caller() const { return jvms()->method(); } | |
| 76 int bci() const { return jvms()->bci(); } | |
| 77 LibraryIntrinsic* intrinsic() const { return _intrinsic; } | |
| 78 vmIntrinsics::ID intrinsic_id() const { return _intrinsic->intrinsic_id(); } | |
| 79 ciMethod* callee() const { return _intrinsic->method(); } | |
| 80 ciSignature* signature() const { return callee()->signature(); } | |
| 81 int arg_size() const { return callee()->arg_size(); } | |
| 82 | |
| 83 bool try_to_inline(); | |
| 84 | |
| 85 // Helper functions to inline natives | |
| 86 void push_result(RegionNode* region, PhiNode* value); | |
| 87 Node* generate_guard(Node* test, RegionNode* region, float true_prob); | |
| 88 Node* generate_slow_guard(Node* test, RegionNode* region); | |
| 89 Node* generate_fair_guard(Node* test, RegionNode* region); | |
| 90 Node* generate_negative_guard(Node* index, RegionNode* region, | |
| 91 // resulting CastII of index: | |
| 92 Node* *pos_index = NULL); | |
| 93 Node* generate_nonpositive_guard(Node* index, bool never_negative, | |
| 94 // resulting CastII of index: | |
| 95 Node* *pos_index = NULL); | |
| 96 Node* generate_limit_guard(Node* offset, Node* subseq_length, | |
| 97 Node* array_length, | |
| 98 RegionNode* region); | |
| 99 Node* generate_current_thread(Node* &tls_output); | |
| 100 address basictype2arraycopy(BasicType t, Node *src_offset, Node *dest_offset, | |
| 2324 | 101 bool disjoint_bases, const char* &name, bool dest_uninitialized); |
| 0 | 102 Node* load_mirror_from_klass(Node* klass); |
| 103 Node* load_klass_from_mirror_common(Node* mirror, bool never_see_null, | |
| 104 int nargs, | |
| 105 RegionNode* region, int null_path, | |
| 106 int offset); | |
| 107 Node* load_klass_from_mirror(Node* mirror, bool never_see_null, int nargs, | |
| 108 RegionNode* region, int null_path) { | |
| 109 int offset = java_lang_Class::klass_offset_in_bytes(); | |
| 110 return load_klass_from_mirror_common(mirror, never_see_null, nargs, | |
| 111 region, null_path, | |
| 112 offset); | |
| 113 } | |
| 114 Node* load_array_klass_from_mirror(Node* mirror, bool never_see_null, | |
| 115 int nargs, | |
| 116 RegionNode* region, int null_path) { | |
| 117 int offset = java_lang_Class::array_klass_offset_in_bytes(); | |
| 118 return load_klass_from_mirror_common(mirror, never_see_null, nargs, | |
| 119 region, null_path, | |
| 120 offset); | |
| 121 } | |
| 122 Node* generate_access_flags_guard(Node* kls, | |
| 123 int modifier_mask, int modifier_bits, | |
| 124 RegionNode* region); | |
| 125 Node* generate_interface_guard(Node* kls, RegionNode* region); | |
| 126 Node* generate_array_guard(Node* kls, RegionNode* region) { | |
| 127 return generate_array_guard_common(kls, region, false, false); | |
| 128 } | |
| 129 Node* generate_non_array_guard(Node* kls, RegionNode* region) { | |
| 130 return generate_array_guard_common(kls, region, false, true); | |
| 131 } | |
| 132 Node* generate_objArray_guard(Node* kls, RegionNode* region) { | |
| 133 return generate_array_guard_common(kls, region, true, false); | |
| 134 } | |
| 135 Node* generate_non_objArray_guard(Node* kls, RegionNode* region) { | |
| 136 return generate_array_guard_common(kls, region, true, true); | |
| 137 } | |
| 138 Node* generate_array_guard_common(Node* kls, RegionNode* region, | |
| 139 bool obj_array, bool not_array); | |
| 140 Node* generate_virtual_guard(Node* obj_klass, RegionNode* slow_region); | |
| 141 CallJavaNode* generate_method_call(vmIntrinsics::ID method_id, | |
| 142 bool is_virtual = false, bool is_static = false); | |
| 143 CallJavaNode* generate_method_call_static(vmIntrinsics::ID method_id) { | |
| 144 return generate_method_call(method_id, false, true); | |
| 145 } | |
| 146 CallJavaNode* generate_method_call_virtual(vmIntrinsics::ID method_id) { | |
| 147 return generate_method_call(method_id, true, false); | |
| 148 } | |
| 149 | |
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150 Node* make_string_method_node(int opcode, Node* str1, Node* cnt1, Node* str2, Node* cnt2); |
| 0 | 151 bool inline_string_compareTo(); |
| 152 bool inline_string_indexOf(); | |
| 153 Node* string_indexOf(Node* string_object, ciTypeArray* target_array, jint offset, jint cache_i, jint md2_i); | |
| 681 | 154 bool inline_string_equals(); |
| 0 | 155 Node* pop_math_arg(); |
| 156 bool runtime_math(const TypeFunc* call_type, address funcAddr, const char* funcName); | |
| 157 bool inline_math_native(vmIntrinsics::ID id); | |
| 158 bool inline_trig(vmIntrinsics::ID id); | |
| 159 bool inline_trans(vmIntrinsics::ID id); | |
| 160 bool inline_abs(vmIntrinsics::ID id); | |
| 161 bool inline_sqrt(vmIntrinsics::ID id); | |
| 162 bool inline_pow(vmIntrinsics::ID id); | |
| 163 bool inline_exp(vmIntrinsics::ID id); | |
| 164 bool inline_min_max(vmIntrinsics::ID id); | |
| 165 Node* generate_min_max(vmIntrinsics::ID id, Node* x, Node* y); | |
| 166 // This returns Type::AnyPtr, RawPtr, or OopPtr. | |
| 167 int classify_unsafe_addr(Node* &base, Node* &offset); | |
| 168 Node* make_unsafe_address(Node* base, Node* offset); | |
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169 // Helper for inline_unsafe_access. |
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170 // Generates the guards that check whether the result of |
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171 // Unsafe.getObject should be recorded in an SATB log buffer. |
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172 void insert_g1_pre_barrier(Node* base_oop, Node* offset, Node* pre_val); |
| 0 | 173 bool inline_unsafe_access(bool is_native_ptr, bool is_store, BasicType type, bool is_volatile); |
| 174 bool inline_unsafe_prefetch(bool is_native_ptr, bool is_store, bool is_static); | |
| 175 bool inline_unsafe_allocate(); | |
| 176 bool inline_unsafe_copyMemory(); | |
| 177 bool inline_native_currentThread(); | |
| 178 bool inline_native_time_funcs(bool isNano); | |
| 179 bool inline_native_isInterrupted(); | |
| 180 bool inline_native_Class_query(vmIntrinsics::ID id); | |
| 181 bool inline_native_subtype_check(); | |
| 182 | |
| 183 bool inline_native_newArray(); | |
| 184 bool inline_native_getLength(); | |
| 185 bool inline_array_copyOf(bool is_copyOfRange); | |
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186 bool inline_array_equals(); |
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187 void copy_to_clone(Node* obj, Node* alloc_obj, Node* obj_size, bool is_array, bool card_mark); |
| 0 | 188 bool inline_native_clone(bool is_virtual); |
| 189 bool inline_native_Reflection_getCallerClass(); | |
| 190 bool inline_native_AtomicLong_get(); | |
| 191 bool inline_native_AtomicLong_attemptUpdate(); | |
| 192 bool is_method_invoke_or_aux_frame(JVMState* jvms); | |
| 193 // Helper function for inlining native object hash method | |
| 194 bool inline_native_hashcode(bool is_virtual, bool is_static); | |
| 195 bool inline_native_getClass(); | |
| 196 | |
| 197 // Helper functions for inlining arraycopy | |
| 198 bool inline_arraycopy(); | |
| 199 void generate_arraycopy(const TypePtr* adr_type, | |
| 200 BasicType basic_elem_type, | |
| 201 Node* src, Node* src_offset, | |
| 202 Node* dest, Node* dest_offset, | |
| 203 Node* copy_length, | |
| 204 bool disjoint_bases = false, | |
| 205 bool length_never_negative = false, | |
| 206 RegionNode* slow_region = NULL); | |
| 207 AllocateArrayNode* tightly_coupled_allocation(Node* ptr, | |
| 208 RegionNode* slow_region); | |
| 209 void generate_clear_array(const TypePtr* adr_type, | |
| 210 Node* dest, | |
| 211 BasicType basic_elem_type, | |
| 212 Node* slice_off, | |
| 213 Node* slice_len, | |
| 214 Node* slice_end); | |
| 215 bool generate_block_arraycopy(const TypePtr* adr_type, | |
| 216 BasicType basic_elem_type, | |
| 217 AllocateNode* alloc, | |
| 218 Node* src, Node* src_offset, | |
| 219 Node* dest, Node* dest_offset, | |
| 2324 | 220 Node* dest_size, bool dest_uninitialized); |
| 0 | 221 void generate_slow_arraycopy(const TypePtr* adr_type, |
| 222 Node* src, Node* src_offset, | |
| 223 Node* dest, Node* dest_offset, | |
| 2324 | 224 Node* copy_length, bool dest_uninitialized); |
| 0 | 225 Node* generate_checkcast_arraycopy(const TypePtr* adr_type, |
| 226 Node* dest_elem_klass, | |
| 227 Node* src, Node* src_offset, | |
| 228 Node* dest, Node* dest_offset, | |
| 2324 | 229 Node* copy_length, bool dest_uninitialized); |
| 0 | 230 Node* generate_generic_arraycopy(const TypePtr* adr_type, |
| 231 Node* src, Node* src_offset, | |
| 232 Node* dest, Node* dest_offset, | |
| 2324 | 233 Node* copy_length, bool dest_uninitialized); |
| 0 | 234 void generate_unchecked_arraycopy(const TypePtr* adr_type, |
| 235 BasicType basic_elem_type, | |
| 236 bool disjoint_bases, | |
| 237 Node* src, Node* src_offset, | |
| 238 Node* dest, Node* dest_offset, | |
| 2324 | 239 Node* copy_length, bool dest_uninitialized); |
| 0 | 240 bool inline_unsafe_CAS(BasicType type); |
| 241 bool inline_unsafe_ordered_store(BasicType type); | |
| 242 bool inline_fp_conversions(vmIntrinsics::ID id); | |
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243 bool inline_numberOfLeadingZeros(vmIntrinsics::ID id); |
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244 bool inline_numberOfTrailingZeros(vmIntrinsics::ID id); |
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245 bool inline_bitCount(vmIntrinsics::ID id); |
| 0 | 246 bool inline_reverseBytes(vmIntrinsics::ID id); |
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247 |
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248 bool inline_reference_get(); |
| 0 | 249 }; |
| 250 | |
| 251 | |
| 252 //---------------------------make_vm_intrinsic---------------------------- | |
| 253 CallGenerator* Compile::make_vm_intrinsic(ciMethod* m, bool is_virtual) { | |
| 254 vmIntrinsics::ID id = m->intrinsic_id(); | |
| 255 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); | |
| 256 | |
| 257 if (DisableIntrinsic[0] != '\0' | |
| 258 && strstr(DisableIntrinsic, vmIntrinsics::name_at(id)) != NULL) { | |
| 259 // disabled by a user request on the command line: | |
| 260 // example: -XX:DisableIntrinsic=_hashCode,_getClass | |
| 261 return NULL; | |
| 262 } | |
| 263 | |
| 264 if (!m->is_loaded()) { | |
| 265 // do not attempt to inline unloaded methods | |
| 266 return NULL; | |
| 267 } | |
| 268 | |
| 269 // Only a few intrinsics implement a virtual dispatch. | |
| 270 // They are expensive calls which are also frequently overridden. | |
| 271 if (is_virtual) { | |
| 272 switch (id) { | |
| 273 case vmIntrinsics::_hashCode: | |
| 274 case vmIntrinsics::_clone: | |
| 275 // OK, Object.hashCode and Object.clone intrinsics come in both flavors | |
| 276 break; | |
| 277 default: | |
| 278 return NULL; | |
| 279 } | |
| 280 } | |
| 281 | |
| 282 // -XX:-InlineNatives disables nearly all intrinsics: | |
| 283 if (!InlineNatives) { | |
| 284 switch (id) { | |
| 285 case vmIntrinsics::_indexOf: | |
| 286 case vmIntrinsics::_compareTo: | |
| 681 | 287 case vmIntrinsics::_equals: |
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288 case vmIntrinsics::_equalsC: |
| 0 | 289 break; // InlineNatives does not control String.compareTo |
| 290 default: | |
| 291 return NULL; | |
| 292 } | |
| 293 } | |
| 294 | |
| 295 switch (id) { | |
| 296 case vmIntrinsics::_compareTo: | |
| 297 if (!SpecialStringCompareTo) return NULL; | |
| 298 break; | |
| 299 case vmIntrinsics::_indexOf: | |
| 300 if (!SpecialStringIndexOf) return NULL; | |
| 301 break; | |
| 681 | 302 case vmIntrinsics::_equals: |
| 303 if (!SpecialStringEquals) return NULL; | |
| 304 break; | |
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305 case vmIntrinsics::_equalsC: |
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306 if (!SpecialArraysEquals) return NULL; |
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307 break; |
| 0 | 308 case vmIntrinsics::_arraycopy: |
| 309 if (!InlineArrayCopy) return NULL; | |
| 310 break; | |
| 311 case vmIntrinsics::_copyMemory: | |
| 312 if (StubRoutines::unsafe_arraycopy() == NULL) return NULL; | |
| 313 if (!InlineArrayCopy) return NULL; | |
| 314 break; | |
| 315 case vmIntrinsics::_hashCode: | |
| 316 if (!InlineObjectHash) return NULL; | |
| 317 break; | |
| 318 case vmIntrinsics::_clone: | |
| 319 case vmIntrinsics::_copyOf: | |
| 320 case vmIntrinsics::_copyOfRange: | |
| 321 if (!InlineObjectCopy) return NULL; | |
| 322 // These also use the arraycopy intrinsic mechanism: | |
| 323 if (!InlineArrayCopy) return NULL; | |
| 324 break; | |
| 325 case vmIntrinsics::_checkIndex: | |
| 326 // We do not intrinsify this. The optimizer does fine with it. | |
| 327 return NULL; | |
| 328 | |
| 329 case vmIntrinsics::_get_AtomicLong: | |
| 330 case vmIntrinsics::_attemptUpdate: | |
| 331 if (!InlineAtomicLong) return NULL; | |
| 332 break; | |
| 333 | |
| 334 case vmIntrinsics::_getCallerClass: | |
| 335 if (!UseNewReflection) return NULL; | |
| 336 if (!InlineReflectionGetCallerClass) return NULL; | |
| 337 if (!JDK_Version::is_gte_jdk14x_version()) return NULL; | |
| 338 break; | |
| 339 | |
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340 case vmIntrinsics::_bitCount_i: |
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341 case vmIntrinsics::_bitCount_l: |
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342 if (!UsePopCountInstruction) return NULL; |
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343 break; |
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344 |
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345 case vmIntrinsics::_Reference_get: |
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346 // It is only when G1 is enabled that we absolutely |
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347 // need to use the intrinsic version of Reference.get() |
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348 // so that the value in the referent field, if necessary, |
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349 // can be registered by the pre-barrier code. |
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350 if (!UseG1GC) return NULL; |
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351 break; |
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352 |
| 0 | 353 default: |
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354 assert(id <= vmIntrinsics::LAST_COMPILER_INLINE, "caller responsibility"); |
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355 assert(id != vmIntrinsics::_Object_init && id != vmIntrinsics::_invoke, "enum out of order?"); |
| 0 | 356 break; |
| 357 } | |
| 358 | |
| 359 // -XX:-InlineClassNatives disables natives from the Class class. | |
| 360 // The flag applies to all reflective calls, notably Array.newArray | |
| 361 // (visible to Java programmers as Array.newInstance). | |
| 362 if (m->holder()->name() == ciSymbol::java_lang_Class() || | |
| 363 m->holder()->name() == ciSymbol::java_lang_reflect_Array()) { | |
| 364 if (!InlineClassNatives) return NULL; | |
| 365 } | |
| 366 | |
| 367 // -XX:-InlineThreadNatives disables natives from the Thread class. | |
| 368 if (m->holder()->name() == ciSymbol::java_lang_Thread()) { | |
| 369 if (!InlineThreadNatives) return NULL; | |
| 370 } | |
| 371 | |
| 372 // -XX:-InlineMathNatives disables natives from the Math,Float and Double classes. | |
| 373 if (m->holder()->name() == ciSymbol::java_lang_Math() || | |
| 374 m->holder()->name() == ciSymbol::java_lang_Float() || | |
| 375 m->holder()->name() == ciSymbol::java_lang_Double()) { | |
| 376 if (!InlineMathNatives) return NULL; | |
| 377 } | |
| 378 | |
| 379 // -XX:-InlineUnsafeOps disables natives from the Unsafe class. | |
| 380 if (m->holder()->name() == ciSymbol::sun_misc_Unsafe()) { | |
| 381 if (!InlineUnsafeOps) return NULL; | |
| 382 } | |
| 383 | |
| 384 return new LibraryIntrinsic(m, is_virtual, (vmIntrinsics::ID) id); | |
| 385 } | |
| 386 | |
| 387 //----------------------register_library_intrinsics----------------------- | |
| 388 // Initialize this file's data structures, for each Compile instance. | |
| 389 void Compile::register_library_intrinsics() { | |
| 390 // Nothing to do here. | |
| 391 } | |
| 392 | |
| 393 JVMState* LibraryIntrinsic::generate(JVMState* jvms) { | |
| 394 LibraryCallKit kit(jvms, this); | |
| 395 Compile* C = kit.C; | |
| 396 int nodes = C->unique(); | |
| 397 #ifndef PRODUCT | |
| 398 if ((PrintIntrinsics || PrintInlining NOT_PRODUCT( || PrintOptoInlining) ) && Verbose) { | |
| 399 char buf[1000]; | |
| 400 const char* str = vmIntrinsics::short_name_as_C_string(intrinsic_id(), buf, sizeof(buf)); | |
| 401 tty->print_cr("Intrinsic %s", str); | |
| 402 } | |
| 403 #endif | |
|
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404 |
| 0 | 405 if (kit.try_to_inline()) { |
| 406 if (PrintIntrinsics || PrintInlining NOT_PRODUCT( || PrintOptoInlining) ) { | |
|
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407 CompileTask::print_inlining(kit.callee(), jvms->depth() - 1, kit.bci(), is_virtual() ? "(intrinsic, virtual)" : "(intrinsic)"); |
| 0 | 408 } |
| 409 C->gather_intrinsic_statistics(intrinsic_id(), is_virtual(), Compile::_intrinsic_worked); | |
| 410 if (C->log()) { | |
| 411 C->log()->elem("intrinsic id='%s'%s nodes='%d'", | |
| 412 vmIntrinsics::name_at(intrinsic_id()), | |
| 413 (is_virtual() ? " virtual='1'" : ""), | |
| 414 C->unique() - nodes); | |
| 415 } | |
| 416 return kit.transfer_exceptions_into_jvms(); | |
| 417 } | |
| 418 | |
| 419 if (PrintIntrinsics) { | |
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420 if (jvms->has_method()) { |
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421 // Not a root compile. |
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422 tty->print("Did not inline intrinsic %s%s at bci:%d in", |
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423 vmIntrinsics::name_at(intrinsic_id()), |
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424 (is_virtual() ? " (virtual)" : ""), kit.bci()); |
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425 kit.caller()->print_short_name(tty); |
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426 tty->print_cr(" (%d bytes)", kit.caller()->code_size()); |
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427 } else { |
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428 // Root compile |
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429 tty->print("Did not generate intrinsic %s%s at bci:%d in", |
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430 vmIntrinsics::name_at(intrinsic_id()), |
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431 (is_virtual() ? " (virtual)" : ""), kit.bci()); |
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432 } |
| 0 | 433 } |
| 434 C->gather_intrinsic_statistics(intrinsic_id(), is_virtual(), Compile::_intrinsic_failed); | |
| 435 return NULL; | |
| 436 } | |
| 437 | |
| 438 bool LibraryCallKit::try_to_inline() { | |
| 439 // Handle symbolic names for otherwise undistinguished boolean switches: | |
| 440 const bool is_store = true; | |
| 441 const bool is_native_ptr = true; | |
| 442 const bool is_static = true; | |
| 443 | |
|
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444 if (!jvms()->has_method()) { |
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445 // Root JVMState has a null method. |
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446 assert(map()->memory()->Opcode() == Op_Parm, ""); |
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447 // Insert the memory aliasing node |
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448 set_all_memory(reset_memory()); |
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449 } |
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450 assert(merged_memory(), ""); |
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451 |
| 0 | 452 switch (intrinsic_id()) { |
| 453 case vmIntrinsics::_hashCode: | |
| 454 return inline_native_hashcode(intrinsic()->is_virtual(), !is_static); | |
| 455 case vmIntrinsics::_identityHashCode: | |
| 456 return inline_native_hashcode(/*!virtual*/ false, is_static); | |
| 457 case vmIntrinsics::_getClass: | |
| 458 return inline_native_getClass(); | |
| 459 | |
| 460 case vmIntrinsics::_dsin: | |
| 461 case vmIntrinsics::_dcos: | |
| 462 case vmIntrinsics::_dtan: | |
| 463 case vmIntrinsics::_dabs: | |
| 464 case vmIntrinsics::_datan2: | |
| 465 case vmIntrinsics::_dsqrt: | |
| 466 case vmIntrinsics::_dexp: | |
| 467 case vmIntrinsics::_dlog: | |
| 468 case vmIntrinsics::_dlog10: | |
| 469 case vmIntrinsics::_dpow: | |
| 470 return inline_math_native(intrinsic_id()); | |
| 471 | |
| 472 case vmIntrinsics::_min: | |
| 473 case vmIntrinsics::_max: | |
| 474 return inline_min_max(intrinsic_id()); | |
| 475 | |
| 476 case vmIntrinsics::_arraycopy: | |
| 477 return inline_arraycopy(); | |
| 478 | |
| 479 case vmIntrinsics::_compareTo: | |
| 480 return inline_string_compareTo(); | |
| 481 case vmIntrinsics::_indexOf: | |
| 482 return inline_string_indexOf(); | |
| 681 | 483 case vmIntrinsics::_equals: |
| 484 return inline_string_equals(); | |
| 0 | 485 |
| 486 case vmIntrinsics::_getObject: | |
| 487 return inline_unsafe_access(!is_native_ptr, !is_store, T_OBJECT, false); | |
| 488 case vmIntrinsics::_getBoolean: | |
| 489 return inline_unsafe_access(!is_native_ptr, !is_store, T_BOOLEAN, false); | |
| 490 case vmIntrinsics::_getByte: | |
| 491 return inline_unsafe_access(!is_native_ptr, !is_store, T_BYTE, false); | |
| 492 case vmIntrinsics::_getShort: | |
| 493 return inline_unsafe_access(!is_native_ptr, !is_store, T_SHORT, false); | |
| 494 case vmIntrinsics::_getChar: | |
| 495 return inline_unsafe_access(!is_native_ptr, !is_store, T_CHAR, false); | |
| 496 case vmIntrinsics::_getInt: | |
| 497 return inline_unsafe_access(!is_native_ptr, !is_store, T_INT, false); | |
| 498 case vmIntrinsics::_getLong: | |
| 499 return inline_unsafe_access(!is_native_ptr, !is_store, T_LONG, false); | |
| 500 case vmIntrinsics::_getFloat: | |
| 501 return inline_unsafe_access(!is_native_ptr, !is_store, T_FLOAT, false); | |
| 502 case vmIntrinsics::_getDouble: | |
| 503 return inline_unsafe_access(!is_native_ptr, !is_store, T_DOUBLE, false); | |
| 504 | |
| 505 case vmIntrinsics::_putObject: | |
| 506 return inline_unsafe_access(!is_native_ptr, is_store, T_OBJECT, false); | |
| 507 case vmIntrinsics::_putBoolean: | |
| 508 return inline_unsafe_access(!is_native_ptr, is_store, T_BOOLEAN, false); | |
| 509 case vmIntrinsics::_putByte: | |
| 510 return inline_unsafe_access(!is_native_ptr, is_store, T_BYTE, false); | |
| 511 case vmIntrinsics::_putShort: | |
| 512 return inline_unsafe_access(!is_native_ptr, is_store, T_SHORT, false); | |
| 513 case vmIntrinsics::_putChar: | |
| 514 return inline_unsafe_access(!is_native_ptr, is_store, T_CHAR, false); | |
| 515 case vmIntrinsics::_putInt: | |
| 516 return inline_unsafe_access(!is_native_ptr, is_store, T_INT, false); | |
| 517 case vmIntrinsics::_putLong: | |
| 518 return inline_unsafe_access(!is_native_ptr, is_store, T_LONG, false); | |
| 519 case vmIntrinsics::_putFloat: | |
| 520 return inline_unsafe_access(!is_native_ptr, is_store, T_FLOAT, false); | |
| 521 case vmIntrinsics::_putDouble: | |
| 522 return inline_unsafe_access(!is_native_ptr, is_store, T_DOUBLE, false); | |
| 523 | |
| 524 case vmIntrinsics::_getByte_raw: | |
| 525 return inline_unsafe_access(is_native_ptr, !is_store, T_BYTE, false); | |
| 526 case vmIntrinsics::_getShort_raw: | |
| 527 return inline_unsafe_access(is_native_ptr, !is_store, T_SHORT, false); | |
| 528 case vmIntrinsics::_getChar_raw: | |
| 529 return inline_unsafe_access(is_native_ptr, !is_store, T_CHAR, false); | |
| 530 case vmIntrinsics::_getInt_raw: | |
| 531 return inline_unsafe_access(is_native_ptr, !is_store, T_INT, false); | |
| 532 case vmIntrinsics::_getLong_raw: | |
| 533 return inline_unsafe_access(is_native_ptr, !is_store, T_LONG, false); | |
| 534 case vmIntrinsics::_getFloat_raw: | |
| 535 return inline_unsafe_access(is_native_ptr, !is_store, T_FLOAT, false); | |
| 536 case vmIntrinsics::_getDouble_raw: | |
| 537 return inline_unsafe_access(is_native_ptr, !is_store, T_DOUBLE, false); | |
| 538 case vmIntrinsics::_getAddress_raw: | |
| 539 return inline_unsafe_access(is_native_ptr, !is_store, T_ADDRESS, false); | |
| 540 | |
| 541 case vmIntrinsics::_putByte_raw: | |
| 542 return inline_unsafe_access(is_native_ptr, is_store, T_BYTE, false); | |
| 543 case vmIntrinsics::_putShort_raw: | |
| 544 return inline_unsafe_access(is_native_ptr, is_store, T_SHORT, false); | |
| 545 case vmIntrinsics::_putChar_raw: | |
| 546 return inline_unsafe_access(is_native_ptr, is_store, T_CHAR, false); | |
| 547 case vmIntrinsics::_putInt_raw: | |
| 548 return inline_unsafe_access(is_native_ptr, is_store, T_INT, false); | |
| 549 case vmIntrinsics::_putLong_raw: | |
| 550 return inline_unsafe_access(is_native_ptr, is_store, T_LONG, false); | |
| 551 case vmIntrinsics::_putFloat_raw: | |
| 552 return inline_unsafe_access(is_native_ptr, is_store, T_FLOAT, false); | |
| 553 case vmIntrinsics::_putDouble_raw: | |
| 554 return inline_unsafe_access(is_native_ptr, is_store, T_DOUBLE, false); | |
| 555 case vmIntrinsics::_putAddress_raw: | |
| 556 return inline_unsafe_access(is_native_ptr, is_store, T_ADDRESS, false); | |
| 557 | |
| 558 case vmIntrinsics::_getObjectVolatile: | |
| 559 return inline_unsafe_access(!is_native_ptr, !is_store, T_OBJECT, true); | |
| 560 case vmIntrinsics::_getBooleanVolatile: | |
| 561 return inline_unsafe_access(!is_native_ptr, !is_store, T_BOOLEAN, true); | |
| 562 case vmIntrinsics::_getByteVolatile: | |
| 563 return inline_unsafe_access(!is_native_ptr, !is_store, T_BYTE, true); | |
| 564 case vmIntrinsics::_getShortVolatile: | |
| 565 return inline_unsafe_access(!is_native_ptr, !is_store, T_SHORT, true); | |
| 566 case vmIntrinsics::_getCharVolatile: | |
| 567 return inline_unsafe_access(!is_native_ptr, !is_store, T_CHAR, true); | |
| 568 case vmIntrinsics::_getIntVolatile: | |
| 569 return inline_unsafe_access(!is_native_ptr, !is_store, T_INT, true); | |
| 570 case vmIntrinsics::_getLongVolatile: | |
| 571 return inline_unsafe_access(!is_native_ptr, !is_store, T_LONG, true); | |
| 572 case vmIntrinsics::_getFloatVolatile: | |
| 573 return inline_unsafe_access(!is_native_ptr, !is_store, T_FLOAT, true); | |
| 574 case vmIntrinsics::_getDoubleVolatile: | |
| 575 return inline_unsafe_access(!is_native_ptr, !is_store, T_DOUBLE, true); | |
| 576 | |
| 577 case vmIntrinsics::_putObjectVolatile: | |
| 578 return inline_unsafe_access(!is_native_ptr, is_store, T_OBJECT, true); | |
| 579 case vmIntrinsics::_putBooleanVolatile: | |
| 580 return inline_unsafe_access(!is_native_ptr, is_store, T_BOOLEAN, true); | |
| 581 case vmIntrinsics::_putByteVolatile: | |
| 582 return inline_unsafe_access(!is_native_ptr, is_store, T_BYTE, true); | |
| 583 case vmIntrinsics::_putShortVolatile: | |
| 584 return inline_unsafe_access(!is_native_ptr, is_store, T_SHORT, true); | |
| 585 case vmIntrinsics::_putCharVolatile: | |
| 586 return inline_unsafe_access(!is_native_ptr, is_store, T_CHAR, true); | |
| 587 case vmIntrinsics::_putIntVolatile: | |
| 588 return inline_unsafe_access(!is_native_ptr, is_store, T_INT, true); | |
| 589 case vmIntrinsics::_putLongVolatile: | |
| 590 return inline_unsafe_access(!is_native_ptr, is_store, T_LONG, true); | |
| 591 case vmIntrinsics::_putFloatVolatile: | |
| 592 return inline_unsafe_access(!is_native_ptr, is_store, T_FLOAT, true); | |
| 593 case vmIntrinsics::_putDoubleVolatile: | |
| 594 return inline_unsafe_access(!is_native_ptr, is_store, T_DOUBLE, true); | |
| 595 | |
| 596 case vmIntrinsics::_prefetchRead: | |
| 597 return inline_unsafe_prefetch(!is_native_ptr, !is_store, !is_static); | |
| 598 case vmIntrinsics::_prefetchWrite: | |
| 599 return inline_unsafe_prefetch(!is_native_ptr, is_store, !is_static); | |
| 600 case vmIntrinsics::_prefetchReadStatic: | |
| 601 return inline_unsafe_prefetch(!is_native_ptr, !is_store, is_static); | |
| 602 case vmIntrinsics::_prefetchWriteStatic: | |
| 603 return inline_unsafe_prefetch(!is_native_ptr, is_store, is_static); | |
| 604 | |
| 605 case vmIntrinsics::_compareAndSwapObject: | |
| 606 return inline_unsafe_CAS(T_OBJECT); | |
| 607 case vmIntrinsics::_compareAndSwapInt: | |
| 608 return inline_unsafe_CAS(T_INT); | |
| 609 case vmIntrinsics::_compareAndSwapLong: | |
| 610 return inline_unsafe_CAS(T_LONG); | |
| 611 | |
| 612 case vmIntrinsics::_putOrderedObject: | |
| 613 return inline_unsafe_ordered_store(T_OBJECT); | |
| 614 case vmIntrinsics::_putOrderedInt: | |
| 615 return inline_unsafe_ordered_store(T_INT); | |
| 616 case vmIntrinsics::_putOrderedLong: | |
| 617 return inline_unsafe_ordered_store(T_LONG); | |
| 618 | |
| 619 case vmIntrinsics::_currentThread: | |
| 620 return inline_native_currentThread(); | |
| 621 case vmIntrinsics::_isInterrupted: | |
| 622 return inline_native_isInterrupted(); | |
| 623 | |
| 624 case vmIntrinsics::_currentTimeMillis: | |
| 625 return inline_native_time_funcs(false); | |
| 626 case vmIntrinsics::_nanoTime: | |
| 627 return inline_native_time_funcs(true); | |
| 628 case vmIntrinsics::_allocateInstance: | |
| 629 return inline_unsafe_allocate(); | |
| 630 case vmIntrinsics::_copyMemory: | |
| 631 return inline_unsafe_copyMemory(); | |
| 632 case vmIntrinsics::_newArray: | |
| 633 return inline_native_newArray(); | |
| 634 case vmIntrinsics::_getLength: | |
| 635 return inline_native_getLength(); | |
| 636 case vmIntrinsics::_copyOf: | |
| 637 return inline_array_copyOf(false); | |
| 638 case vmIntrinsics::_copyOfRange: | |
| 639 return inline_array_copyOf(true); | |
|
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640 case vmIntrinsics::_equalsC: |
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641 return inline_array_equals(); |
| 0 | 642 case vmIntrinsics::_clone: |
| 643 return inline_native_clone(intrinsic()->is_virtual()); | |
| 644 | |
| 645 case vmIntrinsics::_isAssignableFrom: | |
| 646 return inline_native_subtype_check(); | |
| 647 | |
| 648 case vmIntrinsics::_isInstance: | |
| 649 case vmIntrinsics::_getModifiers: | |
| 650 case vmIntrinsics::_isInterface: | |
| 651 case vmIntrinsics::_isArray: | |
| 652 case vmIntrinsics::_isPrimitive: | |
| 653 case vmIntrinsics::_getSuperclass: | |
| 654 case vmIntrinsics::_getComponentType: | |
| 655 case vmIntrinsics::_getClassAccessFlags: | |
| 656 return inline_native_Class_query(intrinsic_id()); | |
| 657 | |
| 658 case vmIntrinsics::_floatToRawIntBits: | |
| 659 case vmIntrinsics::_floatToIntBits: | |
| 660 case vmIntrinsics::_intBitsToFloat: | |
| 661 case vmIntrinsics::_doubleToRawLongBits: | |
| 662 case vmIntrinsics::_doubleToLongBits: | |
| 663 case vmIntrinsics::_longBitsToDouble: | |
| 664 return inline_fp_conversions(intrinsic_id()); | |
| 665 | |
|
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666 case vmIntrinsics::_numberOfLeadingZeros_i: |
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667 case vmIntrinsics::_numberOfLeadingZeros_l: |
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668 return inline_numberOfLeadingZeros(intrinsic_id()); |
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669 |
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670 case vmIntrinsics::_numberOfTrailingZeros_i: |
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671 case vmIntrinsics::_numberOfTrailingZeros_l: |
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672 return inline_numberOfTrailingZeros(intrinsic_id()); |
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673 |
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674 case vmIntrinsics::_bitCount_i: |
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675 case vmIntrinsics::_bitCount_l: |
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676 return inline_bitCount(intrinsic_id()); |
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677 |
| 0 | 678 case vmIntrinsics::_reverseBytes_i: |
| 679 case vmIntrinsics::_reverseBytes_l: | |
|
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680 case vmIntrinsics::_reverseBytes_s: |
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|
681 case vmIntrinsics::_reverseBytes_c: |
| 0 | 682 return inline_reverseBytes((vmIntrinsics::ID) intrinsic_id()); |
| 683 | |
| 684 case vmIntrinsics::_get_AtomicLong: | |
| 685 return inline_native_AtomicLong_get(); | |
| 686 case vmIntrinsics::_attemptUpdate: | |
| 687 return inline_native_AtomicLong_attemptUpdate(); | |
| 688 | |
| 689 case vmIntrinsics::_getCallerClass: | |
| 690 return inline_native_Reflection_getCallerClass(); | |
| 691 | |
|
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692 case vmIntrinsics::_Reference_get: |
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693 return inline_reference_get(); |
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694 |
| 0 | 695 default: |
| 696 // If you get here, it may be that someone has added a new intrinsic | |
| 697 // to the list in vmSymbols.hpp without implementing it here. | |
| 698 #ifndef PRODUCT | |
| 699 if ((PrintMiscellaneous && (Verbose || WizardMode)) || PrintOpto) { | |
| 700 tty->print_cr("*** Warning: Unimplemented intrinsic %s(%d)", | |
| 701 vmIntrinsics::name_at(intrinsic_id()), intrinsic_id()); | |
| 702 } | |
| 703 #endif | |
| 704 return false; | |
| 705 } | |
| 706 } | |
| 707 | |
| 708 //------------------------------push_result------------------------------ | |
| 709 // Helper function for finishing intrinsics. | |
| 710 void LibraryCallKit::push_result(RegionNode* region, PhiNode* value) { | |
| 711 record_for_igvn(region); | |
| 712 set_control(_gvn.transform(region)); | |
| 713 BasicType value_type = value->type()->basic_type(); | |
| 714 push_node(value_type, _gvn.transform(value)); | |
| 715 } | |
| 716 | |
| 717 //------------------------------generate_guard--------------------------- | |
| 718 // Helper function for generating guarded fast-slow graph structures. | |
| 719 // The given 'test', if true, guards a slow path. If the test fails | |
| 720 // then a fast path can be taken. (We generally hope it fails.) | |
| 721 // In all cases, GraphKit::control() is updated to the fast path. | |
| 722 // The returned value represents the control for the slow path. | |
| 723 // The return value is never 'top'; it is either a valid control | |
| 724 // or NULL if it is obvious that the slow path can never be taken. | |
| 725 // Also, if region and the slow control are not NULL, the slow edge | |
| 726 // is appended to the region. | |
| 727 Node* LibraryCallKit::generate_guard(Node* test, RegionNode* region, float true_prob) { | |
| 728 if (stopped()) { | |
| 729 // Already short circuited. | |
| 730 return NULL; | |
| 731 } | |
| 732 | |
| 733 // Build an if node and its projections. | |
| 734 // If test is true we take the slow path, which we assume is uncommon. | |
| 735 if (_gvn.type(test) == TypeInt::ZERO) { | |
| 736 // The slow branch is never taken. No need to build this guard. | |
| 737 return NULL; | |
| 738 } | |
| 739 | |
| 740 IfNode* iff = create_and_map_if(control(), test, true_prob, COUNT_UNKNOWN); | |
| 741 | |
| 742 Node* if_slow = _gvn.transform( new (C, 1) IfTrueNode(iff) ); | |
| 743 if (if_slow == top()) { | |
| 744 // The slow branch is never taken. No need to build this guard. | |
| 745 return NULL; | |
| 746 } | |
| 747 | |
| 748 if (region != NULL) | |
| 749 region->add_req(if_slow); | |
| 750 | |
| 751 Node* if_fast = _gvn.transform( new (C, 1) IfFalseNode(iff) ); | |
| 752 set_control(if_fast); | |
| 753 | |
| 754 return if_slow; | |
| 755 } | |
| 756 | |
| 757 inline Node* LibraryCallKit::generate_slow_guard(Node* test, RegionNode* region) { | |
| 758 return generate_guard(test, region, PROB_UNLIKELY_MAG(3)); | |
| 759 } | |
| 760 inline Node* LibraryCallKit::generate_fair_guard(Node* test, RegionNode* region) { | |
| 761 return generate_guard(test, region, PROB_FAIR); | |
| 762 } | |
| 763 | |
| 764 inline Node* LibraryCallKit::generate_negative_guard(Node* index, RegionNode* region, | |
| 765 Node* *pos_index) { | |
| 766 if (stopped()) | |
| 767 return NULL; // already stopped | |
| 768 if (_gvn.type(index)->higher_equal(TypeInt::POS)) // [0,maxint] | |
| 769 return NULL; // index is already adequately typed | |
| 770 Node* cmp_lt = _gvn.transform( new (C, 3) CmpINode(index, intcon(0)) ); | |
| 771 Node* bol_lt = _gvn.transform( new (C, 2) BoolNode(cmp_lt, BoolTest::lt) ); | |
| 772 Node* is_neg = generate_guard(bol_lt, region, PROB_MIN); | |
| 773 if (is_neg != NULL && pos_index != NULL) { | |
| 774 // Emulate effect of Parse::adjust_map_after_if. | |
| 775 Node* ccast = new (C, 2) CastIINode(index, TypeInt::POS); | |
| 776 ccast->set_req(0, control()); | |
| 777 (*pos_index) = _gvn.transform(ccast); | |
| 778 } | |
| 779 return is_neg; | |
| 780 } | |
| 781 | |
| 782 inline Node* LibraryCallKit::generate_nonpositive_guard(Node* index, bool never_negative, | |
| 783 Node* *pos_index) { | |
| 784 if (stopped()) | |
| 785 return NULL; // already stopped | |
| 786 if (_gvn.type(index)->higher_equal(TypeInt::POS1)) // [1,maxint] | |
| 787 return NULL; // index is already adequately typed | |
| 788 Node* cmp_le = _gvn.transform( new (C, 3) CmpINode(index, intcon(0)) ); | |
| 789 BoolTest::mask le_or_eq = (never_negative ? BoolTest::eq : BoolTest::le); | |
| 790 Node* bol_le = _gvn.transform( new (C, 2) BoolNode(cmp_le, le_or_eq) ); | |
| 791 Node* is_notp = generate_guard(bol_le, NULL, PROB_MIN); | |
| 792 if (is_notp != NULL && pos_index != NULL) { | |
| 793 // Emulate effect of Parse::adjust_map_after_if. | |
| 794 Node* ccast = new (C, 2) CastIINode(index, TypeInt::POS1); | |
| 795 ccast->set_req(0, control()); | |
| 796 (*pos_index) = _gvn.transform(ccast); | |
| 797 } | |
| 798 return is_notp; | |
| 799 } | |
| 800 | |
| 801 // Make sure that 'position' is a valid limit index, in [0..length]. | |
| 802 // There are two equivalent plans for checking this: | |
| 803 // A. (offset + copyLength) unsigned<= arrayLength | |
| 804 // B. offset <= (arrayLength - copyLength) | |
| 805 // We require that all of the values above, except for the sum and | |
| 806 // difference, are already known to be non-negative. | |
| 807 // Plan A is robust in the face of overflow, if offset and copyLength | |
| 808 // are both hugely positive. | |
| 809 // | |
| 810 // Plan B is less direct and intuitive, but it does not overflow at | |
| 811 // all, since the difference of two non-negatives is always | |
| 812 // representable. Whenever Java methods must perform the equivalent | |
| 813 // check they generally use Plan B instead of Plan A. | |
| 814 // For the moment we use Plan A. | |
| 815 inline Node* LibraryCallKit::generate_limit_guard(Node* offset, | |
| 816 Node* subseq_length, | |
| 817 Node* array_length, | |
| 818 RegionNode* region) { | |
| 819 if (stopped()) | |
| 820 return NULL; // already stopped | |
| 821 bool zero_offset = _gvn.type(offset) == TypeInt::ZERO; | |
| 822 if (zero_offset && _gvn.eqv_uncast(subseq_length, array_length)) | |
| 823 return NULL; // common case of whole-array copy | |
| 824 Node* last = subseq_length; | |
| 825 if (!zero_offset) // last += offset | |
| 826 last = _gvn.transform( new (C, 3) AddINode(last, offset)); | |
| 827 Node* cmp_lt = _gvn.transform( new (C, 3) CmpUNode(array_length, last) ); | |
| 828 Node* bol_lt = _gvn.transform( new (C, 2) BoolNode(cmp_lt, BoolTest::lt) ); | |
| 829 Node* is_over = generate_guard(bol_lt, region, PROB_MIN); | |
| 830 return is_over; | |
| 831 } | |
| 832 | |
| 833 | |
| 834 //--------------------------generate_current_thread-------------------- | |
| 835 Node* LibraryCallKit::generate_current_thread(Node* &tls_output) { | |
| 836 ciKlass* thread_klass = env()->Thread_klass(); | |
| 837 const Type* thread_type = TypeOopPtr::make_from_klass(thread_klass)->cast_to_ptr_type(TypePtr::NotNull); | |
| 838 Node* thread = _gvn.transform(new (C, 1) ThreadLocalNode()); | |
| 839 Node* p = basic_plus_adr(top()/*!oop*/, thread, in_bytes(JavaThread::threadObj_offset())); | |
| 840 Node* threadObj = make_load(NULL, p, thread_type, T_OBJECT); | |
| 841 tls_output = thread; | |
| 842 return threadObj; | |
| 843 } | |
| 844 | |
| 845 | |
|
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846 //------------------------------make_string_method_node------------------------ |
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847 // Helper method for String intrinsic finctions. |
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848 Node* LibraryCallKit::make_string_method_node(int opcode, Node* str1, Node* cnt1, Node* str2, Node* cnt2) { |
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849 const int value_offset = java_lang_String::value_offset_in_bytes(); |
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850 const int count_offset = java_lang_String::count_offset_in_bytes(); |
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851 const int offset_offset = java_lang_String::offset_offset_in_bytes(); |
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852 |
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853 Node* no_ctrl = NULL; |
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854 |
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855 ciInstanceKlass* klass = env()->String_klass(); |
|
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856 const TypeOopPtr* string_type = TypeOopPtr::make_from_klass(klass); |
|
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857 |
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858 const TypeAryPtr* value_type = |
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859 TypeAryPtr::make(TypePtr::NotNull, |
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860 TypeAry::make(TypeInt::CHAR,TypeInt::POS), |
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861 ciTypeArrayKlass::make(T_CHAR), true, 0); |
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862 |
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863 // Get start addr of string and substring |
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864 Node* str1_valuea = basic_plus_adr(str1, str1, value_offset); |
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865 Node* str1_value = make_load(no_ctrl, str1_valuea, value_type, T_OBJECT, string_type->add_offset(value_offset)); |
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866 Node* str1_offseta = basic_plus_adr(str1, str1, offset_offset); |
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867 Node* str1_offset = make_load(no_ctrl, str1_offseta, TypeInt::INT, T_INT, string_type->add_offset(offset_offset)); |
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868 Node* str1_start = array_element_address(str1_value, str1_offset, T_CHAR); |
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869 |
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870 // Pin loads from String::equals() argument since it could be NULL. |
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871 Node* str2_ctrl = (opcode == Op_StrEquals) ? control() : no_ctrl; |
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872 Node* str2_valuea = basic_plus_adr(str2, str2, value_offset); |
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873 Node* str2_value = make_load(str2_ctrl, str2_valuea, value_type, T_OBJECT, string_type->add_offset(value_offset)); |
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874 Node* str2_offseta = basic_plus_adr(str2, str2, offset_offset); |
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875 Node* str2_offset = make_load(str2_ctrl, str2_offseta, TypeInt::INT, T_INT, string_type->add_offset(offset_offset)); |
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876 Node* str2_start = array_element_address(str2_value, str2_offset, T_CHAR); |
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877 |
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878 Node* result = NULL; |
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879 switch (opcode) { |
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880 case Op_StrIndexOf: |
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881 result = new (C, 6) StrIndexOfNode(control(), memory(TypeAryPtr::CHARS), |
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882 str1_start, cnt1, str2_start, cnt2); |
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883 break; |
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884 case Op_StrComp: |
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885 result = new (C, 6) StrCompNode(control(), memory(TypeAryPtr::CHARS), |
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886 str1_start, cnt1, str2_start, cnt2); |
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887 break; |
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888 case Op_StrEquals: |
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889 result = new (C, 5) StrEqualsNode(control(), memory(TypeAryPtr::CHARS), |
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890 str1_start, str2_start, cnt1); |
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891 break; |
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892 default: |
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893 ShouldNotReachHere(); |
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894 return NULL; |
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|
895 } |
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896 |
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897 // All these intrinsics have checks. |
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898 C->set_has_split_ifs(true); // Has chance for split-if optimization |
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899 |
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900 return _gvn.transform(result); |
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901 } |
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902 |
| 0 | 903 //------------------------------inline_string_compareTo------------------------ |
| 904 bool LibraryCallKit::inline_string_compareTo() { | |
| 905 | |
| 681 | 906 if (!Matcher::has_match_rule(Op_StrComp)) return false; |
| 907 | |
| 0 | 908 const int value_offset = java_lang_String::value_offset_in_bytes(); |
| 909 const int count_offset = java_lang_String::count_offset_in_bytes(); | |
| 910 const int offset_offset = java_lang_String::offset_offset_in_bytes(); | |
| 911 | |
| 912 _sp += 2; | |
| 913 Node *argument = pop(); // pop non-receiver first: it was pushed second | |
| 914 Node *receiver = pop(); | |
| 915 | |
| 916 // Null check on self without removing any arguments. The argument | |
| 917 // null check technically happens in the wrong place, which can lead to | |
| 918 // invalid stack traces when string compare is inlined into a method | |
| 919 // which handles NullPointerExceptions. | |
| 920 _sp += 2; | |
| 921 receiver = do_null_check(receiver, T_OBJECT); | |
| 922 argument = do_null_check(argument, T_OBJECT); | |
| 923 _sp -= 2; | |
| 924 if (stopped()) { | |
| 925 return true; | |
| 926 } | |
| 927 | |
| 928 ciInstanceKlass* klass = env()->String_klass(); | |
|
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929 const TypeOopPtr* string_type = TypeOopPtr::make_from_klass(klass); |
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930 Node* no_ctrl = NULL; |
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931 |
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932 // Get counts for string and argument |
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933 Node* receiver_cnta = basic_plus_adr(receiver, receiver, count_offset); |
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934 Node* receiver_cnt = make_load(no_ctrl, receiver_cnta, TypeInt::INT, T_INT, string_type->add_offset(count_offset)); |
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935 |
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936 Node* argument_cnta = basic_plus_adr(argument, argument, count_offset); |
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937 Node* argument_cnt = make_load(no_ctrl, argument_cnta, TypeInt::INT, T_INT, string_type->add_offset(count_offset)); |
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938 |
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939 Node* compare = make_string_method_node(Op_StrComp, receiver, receiver_cnt, argument, argument_cnt); |
| 0 | 940 push(compare); |
| 941 return true; | |
| 942 } | |
| 943 | |
| 681 | 944 //------------------------------inline_string_equals------------------------ |
| 945 bool LibraryCallKit::inline_string_equals() { | |
| 946 | |
| 947 if (!Matcher::has_match_rule(Op_StrEquals)) return false; | |
| 948 | |
| 949 const int value_offset = java_lang_String::value_offset_in_bytes(); | |
| 950 const int count_offset = java_lang_String::count_offset_in_bytes(); | |
| 951 const int offset_offset = java_lang_String::offset_offset_in_bytes(); | |
| 952 | |
|
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953 int nargs = 2; |
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954 _sp += nargs; |
| 681 | 955 Node* argument = pop(); // pop non-receiver first: it was pushed second |
| 956 Node* receiver = pop(); | |
| 957 | |
| 958 // Null check on self without removing any arguments. The argument | |
| 959 // null check technically happens in the wrong place, which can lead to | |
| 960 // invalid stack traces when string compare is inlined into a method | |
| 961 // which handles NullPointerExceptions. | |
|
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962 _sp += nargs; |
| 681 | 963 receiver = do_null_check(receiver, T_OBJECT); |
| 964 //should not do null check for argument for String.equals(), because spec | |
| 965 //allows to specify NULL as argument. | |
|
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966 _sp -= nargs; |
| 681 | 967 |
| 968 if (stopped()) { | |
| 969 return true; | |
| 970 } | |
| 971 | |
|
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972 // paths (plus control) merge |
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973 RegionNode* region = new (C, 5) RegionNode(5); |
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974 Node* phi = new (C, 5) PhiNode(region, TypeInt::BOOL); |
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975 |
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976 // does source == target string? |
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977 Node* cmp = _gvn.transform(new (C, 3) CmpPNode(receiver, argument)); |
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978 Node* bol = _gvn.transform(new (C, 2) BoolNode(cmp, BoolTest::eq)); |
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979 |
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980 Node* if_eq = generate_slow_guard(bol, NULL); |
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981 if (if_eq != NULL) { |
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982 // receiver == argument |
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983 phi->init_req(2, intcon(1)); |
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984 region->init_req(2, if_eq); |
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985 } |
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986 |
| 681 | 987 // get String klass for instanceOf |
| 988 ciInstanceKlass* klass = env()->String_klass(); | |
| 989 | |
|
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990 if (!stopped()) { |
|
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991 _sp += nargs; // gen_instanceof might do an uncommon trap |
|
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992 Node* inst = gen_instanceof(argument, makecon(TypeKlassPtr::make(klass))); |
|
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993 _sp -= nargs; |
|
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994 Node* cmp = _gvn.transform(new (C, 3) CmpINode(inst, intcon(1))); |
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995 Node* bol = _gvn.transform(new (C, 2) BoolNode(cmp, BoolTest::ne)); |
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996 |
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997 Node* inst_false = generate_guard(bol, NULL, PROB_MIN); |
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998 //instanceOf == true, fallthrough |
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999 |
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1000 if (inst_false != NULL) { |
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1001 phi->init_req(3, intcon(0)); |
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1002 region->init_req(3, inst_false); |
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1003 } |
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1004 } |
| 681 | 1005 |
|
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1006 const TypeOopPtr* string_type = TypeOopPtr::make_from_klass(klass); |
| 681 | 1007 |
|
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1008 Node* no_ctrl = NULL; |
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1009 Node* receiver_cnt; |
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1010 Node* argument_cnt; |
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1011 |
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1012 if (!stopped()) { |
|
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1013 // Properly cast the argument to String |
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1014 argument = _gvn.transform(new (C, 2) CheckCastPPNode(control(), argument, string_type)); |
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1015 |
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1016 // Get counts for string and argument |
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1017 Node* receiver_cnta = basic_plus_adr(receiver, receiver, count_offset); |
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1018 receiver_cnt = make_load(no_ctrl, receiver_cnta, TypeInt::INT, T_INT, string_type->add_offset(count_offset)); |
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1019 |
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1020 // Pin load from argument string since it could be NULL. |
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1021 Node* argument_cnta = basic_plus_adr(argument, argument, count_offset); |
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1022 argument_cnt = make_load(control(), argument_cnta, TypeInt::INT, T_INT, string_type->add_offset(count_offset)); |
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1023 |
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1024 // Check for receiver count != argument count |
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1025 Node* cmp = _gvn.transform( new(C, 3) CmpINode(receiver_cnt, argument_cnt) ); |
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1026 Node* bol = _gvn.transform( new(C, 2) BoolNode(cmp, BoolTest::ne) ); |
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1027 Node* if_ne = generate_slow_guard(bol, NULL); |
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1028 if (if_ne != NULL) { |
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1029 phi->init_req(4, intcon(0)); |
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1030 region->init_req(4, if_ne); |
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1031 } |
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1032 } |
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1033 |
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1034 // Check for count == 0 is done by mach node StrEquals. |
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1035 |
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1036 if (!stopped()) { |
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1037 Node* equals = make_string_method_node(Op_StrEquals, receiver, receiver_cnt, argument, argument_cnt); |
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1038 phi->init_req(1, equals); |
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1039 region->init_req(1, control()); |
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1040 } |
| 681 | 1041 |
| 1042 // post merge | |
| 1043 set_control(_gvn.transform(region)); | |
| 1044 record_for_igvn(region); | |
| 1045 | |
| 1046 push(_gvn.transform(phi)); | |
| 1047 | |
| 1048 return true; | |
| 1049 } | |
| 1050 | |
|
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1051 //------------------------------inline_array_equals---------------------------- |
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1052 bool LibraryCallKit::inline_array_equals() { |
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1053 |
|
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1054 if (!Matcher::has_match_rule(Op_AryEq)) return false; |
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1055 |
|
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1056 _sp += 2; |
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1057 Node *argument2 = pop(); |
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1058 Node *argument1 = pop(); |
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1059 |
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1060 Node* equals = |
|
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1061 _gvn.transform(new (C, 4) AryEqNode(control(), memory(TypeAryPtr::CHARS), |
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1062 argument1, argument2) ); |
|
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1063 push(equals); |
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1064 return true; |
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1065 } |
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1066 |
| 0 | 1067 // Java version of String.indexOf(constant string) |
| 1068 // class StringDecl { | |
| 1069 // StringDecl(char[] ca) { | |
| 1070 // offset = 0; | |
| 1071 // count = ca.length; | |
| 1072 // value = ca; | |
| 1073 // } | |
| 1074 // int offset; | |
| 1075 // int count; | |
| 1076 // char[] value; | |
| 1077 // } | |
| 1078 // | |
| 1079 // static int string_indexOf_J(StringDecl string_object, char[] target_object, | |
| 1080 // int targetOffset, int cache_i, int md2) { | |
| 1081 // int cache = cache_i; | |
| 1082 // int sourceOffset = string_object.offset; | |
| 1083 // int sourceCount = string_object.count; | |
| 1084 // int targetCount = target_object.length; | |
| 1085 // | |
| 1086 // int targetCountLess1 = targetCount - 1; | |
| 1087 // int sourceEnd = sourceOffset + sourceCount - targetCountLess1; | |
| 1088 // | |
| 1089 // char[] source = string_object.value; | |
| 1090 // char[] target = target_object; | |
| 1091 // int lastChar = target[targetCountLess1]; | |
| 1092 // | |
| 1093 // outer_loop: | |
| 1094 // for (int i = sourceOffset; i < sourceEnd; ) { | |
| 1095 // int src = source[i + targetCountLess1]; | |
| 1096 // if (src == lastChar) { | |
| 1097 // // With random strings and a 4-character alphabet, | |
| 1098 // // reverse matching at this point sets up 0.8% fewer | |
| 1099 // // frames, but (paradoxically) makes 0.3% more probes. | |
| 1100 // // Since those probes are nearer the lastChar probe, | |
| 1101 // // there is may be a net D$ win with reverse matching. | |
| 1102 // // But, reversing loop inhibits unroll of inner loop | |
| 1103 // // for unknown reason. So, does running outer loop from | |
| 1104 // // (sourceOffset - targetCountLess1) to (sourceOffset + sourceCount) | |
| 1105 // for (int j = 0; j < targetCountLess1; j++) { | |
| 1106 // if (target[targetOffset + j] != source[i+j]) { | |
| 1107 // if ((cache & (1 << source[i+j])) == 0) { | |
| 1108 // if (md2 < j+1) { | |
| 1109 // i += j+1; | |
| 1110 // continue outer_loop; | |
| 1111 // } | |
| 1112 // } | |
| 1113 // i += md2; | |
| 1114 // continue outer_loop; | |
| 1115 // } | |
| 1116 // } | |
| 1117 // return i - sourceOffset; | |
| 1118 // } | |
| 1119 // if ((cache & (1 << src)) == 0) { | |
| 1120 // i += targetCountLess1; | |
| 1121 // } // using "i += targetCount;" and an "else i++;" causes a jump to jump. | |
| 1122 // i++; | |
| 1123 // } | |
| 1124 // return -1; | |
| 1125 // } | |
| 1126 | |
| 1127 //------------------------------string_indexOf------------------------ | |
| 1128 Node* LibraryCallKit::string_indexOf(Node* string_object, ciTypeArray* target_array, jint targetOffset_i, | |
| 1129 jint cache_i, jint md2_i) { | |
| 1130 | |
| 1131 Node* no_ctrl = NULL; | |
| 1132 float likely = PROB_LIKELY(0.9); | |
| 1133 float unlikely = PROB_UNLIKELY(0.9); | |
| 1134 | |
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1135 const int nargs = 2; // number of arguments to push back for uncommon trap in predicate |
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1136 |
| 0 | 1137 const int value_offset = java_lang_String::value_offset_in_bytes(); |
| 1138 const int count_offset = java_lang_String::count_offset_in_bytes(); | |
| 1139 const int offset_offset = java_lang_String::offset_offset_in_bytes(); | |
| 1140 | |
| 1141 ciInstanceKlass* klass = env()->String_klass(); | |
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1142 const TypeOopPtr* string_type = TypeOopPtr::make_from_klass(klass); |
| 0 | 1143 const TypeAryPtr* source_type = TypeAryPtr::make(TypePtr::NotNull, TypeAry::make(TypeInt::CHAR,TypeInt::POS), ciTypeArrayKlass::make(T_CHAR), true, 0); |
| 1144 | |
| 1145 Node* sourceOffseta = basic_plus_adr(string_object, string_object, offset_offset); | |
| 1146 Node* sourceOffset = make_load(no_ctrl, sourceOffseta, TypeInt::INT, T_INT, string_type->add_offset(offset_offset)); | |
| 1147 Node* sourceCounta = basic_plus_adr(string_object, string_object, count_offset); | |
| 1148 Node* sourceCount = make_load(no_ctrl, sourceCounta, TypeInt::INT, T_INT, string_type->add_offset(count_offset)); | |
| 1149 Node* sourcea = basic_plus_adr(string_object, string_object, value_offset); | |
| 1150 Node* source = make_load(no_ctrl, sourcea, source_type, T_OBJECT, string_type->add_offset(value_offset)); | |
| 1151 | |
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1152 Node* target = _gvn.transform( makecon(TypeOopPtr::make_from_constant(target_array, true)) ); |
| 0 | 1153 jint target_length = target_array->length(); |
| 1154 const TypeAry* target_array_type = TypeAry::make(TypeInt::CHAR, TypeInt::make(0, target_length, Type::WidenMin)); | |
| 1155 const TypeAryPtr* target_type = TypeAryPtr::make(TypePtr::BotPTR, target_array_type, target_array->klass(), true, Type::OffsetBot); | |
| 1156 | |
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1157 IdealKit kit(this, false, true); |
| 0 | 1158 #define __ kit. |
| 1159 Node* zero = __ ConI(0); | |
| 1160 Node* one = __ ConI(1); | |
| 1161 Node* cache = __ ConI(cache_i); | |
| 1162 Node* md2 = __ ConI(md2_i); | |
| 1163 Node* lastChar = __ ConI(target_array->char_at(target_length - 1)); | |
| 1164 Node* targetCount = __ ConI(target_length); | |
| 1165 Node* targetCountLess1 = __ ConI(target_length - 1); | |
| 1166 Node* targetOffset = __ ConI(targetOffset_i); | |
| 1167 Node* sourceEnd = __ SubI(__ AddI(sourceOffset, sourceCount), targetCountLess1); | |
| 1168 | |
|
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1169 IdealVariable rtn(kit), i(kit), j(kit); __ declarations_done(); |
| 0 | 1170 Node* outer_loop = __ make_label(2 /* goto */); |
| 1171 Node* return_ = __ make_label(1); | |
| 1172 | |
| 1173 __ set(rtn,__ ConI(-1)); | |
|
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1174 __ loop(this, nargs, i, sourceOffset, BoolTest::lt, sourceEnd); { |
| 0 | 1175 Node* i2 = __ AddI(__ value(i), targetCountLess1); |
| 1176 // pin to prohibit loading of "next iteration" value which may SEGV (rare) | |
| 1177 Node* src = load_array_element(__ ctrl(), source, i2, TypeAryPtr::CHARS); | |
| 1178 __ if_then(src, BoolTest::eq, lastChar, unlikely); { | |
|
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1179 __ loop(this, nargs, j, zero, BoolTest::lt, targetCountLess1); { |
| 0 | 1180 Node* tpj = __ AddI(targetOffset, __ value(j)); |
| 1181 Node* targ = load_array_element(no_ctrl, target, tpj, target_type); | |
| 1182 Node* ipj = __ AddI(__ value(i), __ value(j)); | |
| 1183 Node* src2 = load_array_element(no_ctrl, source, ipj, TypeAryPtr::CHARS); | |
| 1184 __ if_then(targ, BoolTest::ne, src2); { | |
| 1185 __ if_then(__ AndI(cache, __ LShiftI(one, src2)), BoolTest::eq, zero); { | |
| 1186 __ if_then(md2, BoolTest::lt, __ AddI(__ value(j), one)); { | |
| 1187 __ increment(i, __ AddI(__ value(j), one)); | |
| 1188 __ goto_(outer_loop); | |
| 1189 } __ end_if(); __ dead(j); | |
| 1190 }__ end_if(); __ dead(j); | |
| 1191 __ increment(i, md2); | |
| 1192 __ goto_(outer_loop); | |
| 1193 }__ end_if(); | |
| 1194 __ increment(j, one); | |
| 1195 }__ end_loop(); __ dead(j); | |
| 1196 __ set(rtn, __ SubI(__ value(i), sourceOffset)); __ dead(i); | |
| 1197 __ goto_(return_); | |
| 1198 }__ end_if(); | |
| 1199 __ if_then(__ AndI(cache, __ LShiftI(one, src)), BoolTest::eq, zero, likely); { | |
| 1200 __ increment(i, targetCountLess1); | |
| 1201 }__ end_if(); | |
| 1202 __ increment(i, one); | |
| 1203 __ bind(outer_loop); | |
| 1204 }__ end_loop(); __ dead(i); | |
| 1205 __ bind(return_); | |
|
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1206 |
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1207 // Final sync IdealKit and GraphKit. |
|
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1208 final_sync(kit); |
| 0 | 1209 Node* result = __ value(rtn); |
| 1210 #undef __ | |
| 1211 C->set_has_loops(true); | |
| 1212 return result; | |
| 1213 } | |
| 1214 | |
| 1215 //------------------------------inline_string_indexOf------------------------ | |
| 1216 bool LibraryCallKit::inline_string_indexOf() { | |
| 1217 | |
| 1218 const int value_offset = java_lang_String::value_offset_in_bytes(); | |
| 1219 const int count_offset = java_lang_String::count_offset_in_bytes(); | |
| 1220 const int offset_offset = java_lang_String::offset_offset_in_bytes(); | |
| 1221 | |
| 1222 _sp += 2; | |
| 681 | 1223 Node *argument = pop(); // pop non-receiver first: it was pushed second |
| 1224 Node *receiver = pop(); | |
| 1225 | |
| 1226 Node* result; | |
|
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1227 // Disable the use of pcmpestri until it can be guaranteed that |
|
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1228 // the load doesn't cross into the uncommited space. |
|
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1229 if (Matcher::has_match_rule(Op_StrIndexOf) && |
| 681 | 1230 UseSSE42Intrinsics) { |
| 1231 // Generate SSE4.2 version of indexOf | |
| 1232 // We currently only have match rules that use SSE4.2 | |
| 1233 | |
| 1234 // Null check on self without removing any arguments. The argument | |
| 1235 // null check technically happens in the wrong place, which can lead to | |
| 1236 // invalid stack traces when string compare is inlined into a method | |
| 1237 // which handles NullPointerExceptions. | |
| 1238 _sp += 2; | |
| 1239 receiver = do_null_check(receiver, T_OBJECT); | |
| 1240 argument = do_null_check(argument, T_OBJECT); | |
| 1241 _sp -= 2; | |
| 1242 | |
| 1243 if (stopped()) { | |
| 1244 return true; | |
| 1245 } | |
| 1246 | |
|
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1247 ciInstanceKlass* str_klass = env()->String_klass(); |
|
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1248 const TypeOopPtr* string_type = TypeOopPtr::make_from_klass(str_klass); |
|
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1249 |
|
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|
1250 // Make the merge point |
|
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1251 RegionNode* result_rgn = new (C, 4) RegionNode(4); |
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1252 Node* result_phi = new (C, 4) PhiNode(result_rgn, TypeInt::INT); |
|
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|
1253 Node* no_ctrl = NULL; |
|
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1254 |
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|
1255 // Get counts for string and substr |
|
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|
1256 Node* source_cnta = basic_plus_adr(receiver, receiver, count_offset); |
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|
1257 Node* source_cnt = make_load(no_ctrl, source_cnta, TypeInt::INT, T_INT, string_type->add_offset(count_offset)); |
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1258 |
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1259 Node* substr_cnta = basic_plus_adr(argument, argument, count_offset); |
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1260 Node* substr_cnt = make_load(no_ctrl, substr_cnta, TypeInt::INT, T_INT, string_type->add_offset(count_offset)); |
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1261 |
|
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|
1262 // Check for substr count > string count |
|
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|
1263 Node* cmp = _gvn.transform( new(C, 3) CmpINode(substr_cnt, source_cnt) ); |
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1264 Node* bol = _gvn.transform( new(C, 2) BoolNode(cmp, BoolTest::gt) ); |
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1265 Node* if_gt = generate_slow_guard(bol, NULL); |
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|
1266 if (if_gt != NULL) { |
|
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|
1267 result_phi->init_req(2, intcon(-1)); |
|
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|
1268 result_rgn->init_req(2, if_gt); |
|
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|
1269 } |
|
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|
1270 |
|
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1271 if (!stopped()) { |
|
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1272 // Check for substr count == 0 |
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1273 cmp = _gvn.transform( new(C, 3) CmpINode(substr_cnt, intcon(0)) ); |
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1274 bol = _gvn.transform( new(C, 2) BoolNode(cmp, BoolTest::eq) ); |
|
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1275 Node* if_zero = generate_slow_guard(bol, NULL); |
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1276 if (if_zero != NULL) { |
|
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1277 result_phi->init_req(3, intcon(0)); |
|
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1278 result_rgn->init_req(3, if_zero); |
|
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|
1279 } |
|
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|
1280 } |
|
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|
1281 |
|
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|
1282 if (!stopped()) { |
|
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|
1283 result = make_string_method_node(Op_StrIndexOf, receiver, source_cnt, argument, substr_cnt); |
|
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|
1284 result_phi->init_req(1, result); |
|
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|
1285 result_rgn->init_req(1, control()); |
|
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|
1286 } |
|
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|
1287 set_control(_gvn.transform(result_rgn)); |
|
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|
1288 record_for_igvn(result_rgn); |
|
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|
1289 result = _gvn.transform(result_phi); |
|
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|
1290 |
|
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|
1291 } else { // Use LibraryCallKit::string_indexOf |
|
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|
1292 // don't intrinsify if argument isn't a constant string. |
| 681 | 1293 if (!argument->is_Con()) { |
| 1294 return false; | |
| 1295 } | |
| 1296 const TypeOopPtr* str_type = _gvn.type(argument)->isa_oopptr(); | |
| 1297 if (str_type == NULL) { | |
| 1298 return false; | |
| 1299 } | |
| 1300 ciInstanceKlass* klass = env()->String_klass(); | |
| 1301 ciObject* str_const = str_type->const_oop(); | |
| 1302 if (str_const == NULL || str_const->klass() != klass) { | |
| 1303 return false; | |
| 1304 } | |
| 1305 ciInstance* str = str_const->as_instance(); | |
| 1306 assert(str != NULL, "must be instance"); | |
| 1307 | |
| 1308 ciObject* v = str->field_value_by_offset(value_offset).as_object(); | |
| 1309 int o = str->field_value_by_offset(offset_offset).as_int(); | |
| 1310 int c = str->field_value_by_offset(count_offset).as_int(); | |
| 1311 ciTypeArray* pat = v->as_type_array(); // pattern (argument) character array | |
| 1312 | |
| 1313 // constant strings have no offset and count == length which | |
| 1314 // simplifies the resulting code somewhat so lets optimize for that. | |
| 1315 if (o != 0 || c != pat->length()) { | |
| 1316 return false; | |
| 1317 } | |
| 1318 | |
| 1319 // Null check on self without removing any arguments. The argument | |
| 1320 // null check technically happens in the wrong place, which can lead to | |
| 1321 // invalid stack traces when string compare is inlined into a method | |
| 1322 // which handles NullPointerExceptions. | |
| 1323 _sp += 2; | |
| 1324 receiver = do_null_check(receiver, T_OBJECT); | |
| 1325 // No null check on the argument is needed since it's a constant String oop. | |
| 1326 _sp -= 2; | |
| 1327 if (stopped()) { | |
|
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|
1328 return true; |
| 681 | 1329 } |
| 1330 | |
| 1331 // The null string as a pattern always returns 0 (match at beginning of string) | |
| 1332 if (c == 0) { | |
| 1333 push(intcon(0)); | |
| 1334 return true; | |
| 1335 } | |
| 1336 | |
| 1337 // Generate default indexOf | |
| 1338 jchar lastChar = pat->char_at(o + (c - 1)); | |
| 1339 int cache = 0; | |
| 1340 int i; | |
| 1341 for (i = 0; i < c - 1; i++) { | |
| 1342 assert(i < pat->length(), "out of range"); | |
| 1343 cache |= (1 << (pat->char_at(o + i) & (sizeof(cache) * BitsPerByte - 1))); | |
| 1344 } | |
| 1345 | |
| 1346 int md2 = c; | |
| 1347 for (i = 0; i < c - 1; i++) { | |
| 1348 assert(i < pat->length(), "out of range"); | |
| 1349 if (pat->char_at(o + i) == lastChar) { | |
| 1350 md2 = (c - 1) - i; | |
| 1351 } | |
| 1352 } | |
| 1353 | |
| 1354 result = string_indexOf(receiver, pat, o, cache, md2); | |
| 0 | 1355 } |
| 1356 | |
| 1357 push(result); | |
| 1358 return true; | |
| 1359 } | |
| 1360 | |
| 1361 //--------------------------pop_math_arg-------------------------------- | |
| 1362 // Pop a double argument to a math function from the stack | |
| 1363 // rounding it if necessary. | |
| 1364 Node * LibraryCallKit::pop_math_arg() { | |
| 1365 Node *arg = pop_pair(); | |
| 1366 if( Matcher::strict_fp_requires_explicit_rounding && UseSSE<=1 ) | |
| 1367 arg = _gvn.transform( new (C, 2) RoundDoubleNode(0, arg) ); | |
| 1368 return arg; | |
| 1369 } | |
| 1370 | |
| 1371 //------------------------------inline_trig---------------------------------- | |
| 1372 // Inline sin/cos/tan instructions, if possible. If rounding is required, do | |
| 1373 // argument reduction which will turn into a fast/slow diamond. | |
| 1374 bool LibraryCallKit::inline_trig(vmIntrinsics::ID id) { | |
| 1375 _sp += arg_size(); // restore stack pointer | |
| 1376 Node* arg = pop_math_arg(); | |
| 1377 Node* trig = NULL; | |
| 1378 | |
| 1379 switch (id) { | |
| 1380 case vmIntrinsics::_dsin: | |
| 1381 trig = _gvn.transform((Node*)new (C, 2) SinDNode(arg)); | |
| 1382 break; | |
| 1383 case vmIntrinsics::_dcos: | |
| 1384 trig = _gvn.transform((Node*)new (C, 2) CosDNode(arg)); | |
| 1385 break; | |
| 1386 case vmIntrinsics::_dtan: | |
| 1387 trig = _gvn.transform((Node*)new (C, 2) TanDNode(arg)); | |
| 1388 break; | |
| 1389 default: | |
| 1390 assert(false, "bad intrinsic was passed in"); | |
| 1391 return false; | |
| 1392 } | |
| 1393 | |
| 1394 // Rounding required? Check for argument reduction! | |
| 1395 if( Matcher::strict_fp_requires_explicit_rounding ) { | |
| 1396 | |
| 1397 static const double pi_4 = 0.7853981633974483; | |
| 1398 static const double neg_pi_4 = -0.7853981633974483; | |
| 1399 // pi/2 in 80-bit extended precision | |
| 1400 // static const unsigned char pi_2_bits_x[] = {0x35,0xc2,0x68,0x21,0xa2,0xda,0x0f,0xc9,0xff,0x3f,0x00,0x00,0x00,0x00,0x00,0x00}; | |
| 1401 // -pi/2 in 80-bit extended precision | |
| 1402 // static const unsigned char neg_pi_2_bits_x[] = {0x35,0xc2,0x68,0x21,0xa2,0xda,0x0f,0xc9,0xff,0xbf,0x00,0x00,0x00,0x00,0x00,0x00}; | |
| 1403 // Cutoff value for using this argument reduction technique | |
| 1404 //static const double pi_2_minus_epsilon = 1.564660403643354; | |
| 1405 //static const double neg_pi_2_plus_epsilon = -1.564660403643354; | |
| 1406 | |
| 1407 // Pseudocode for sin: | |
| 1408 // if (x <= Math.PI / 4.0) { | |
| 1409 // if (x >= -Math.PI / 4.0) return fsin(x); | |
| 1410 // if (x >= -Math.PI / 2.0) return -fcos(x + Math.PI / 2.0); | |
| 1411 // } else { | |
| 1412 // if (x <= Math.PI / 2.0) return fcos(x - Math.PI / 2.0); | |
| 1413 // } | |
| 1414 // return StrictMath.sin(x); | |
| 1415 | |
| 1416 // Pseudocode for cos: | |
| 1417 // if (x <= Math.PI / 4.0) { | |
| 1418 // if (x >= -Math.PI / 4.0) return fcos(x); | |
| 1419 // if (x >= -Math.PI / 2.0) return fsin(x + Math.PI / 2.0); | |
| 1420 // } else { | |
| 1421 // if (x <= Math.PI / 2.0) return -fsin(x - Math.PI / 2.0); | |
| 1422 // } | |
| 1423 // return StrictMath.cos(x); | |
| 1424 | |
| 1425 // Actually, sticking in an 80-bit Intel value into C2 will be tough; it | |
| 1426 // requires a special machine instruction to load it. Instead we'll try | |
| 1427 // the 'easy' case. If we really need the extra range +/- PI/2 we'll | |
| 1428 // probably do the math inside the SIN encoding. | |
| 1429 | |
| 1430 // Make the merge point | |
| 1431 RegionNode *r = new (C, 3) RegionNode(3); | |
| 1432 Node *phi = new (C, 3) PhiNode(r,Type::DOUBLE); | |
| 1433 | |
| 1434 // Flatten arg so we need only 1 test | |
| 1435 Node *abs = _gvn.transform(new (C, 2) AbsDNode(arg)); | |
| 1436 // Node for PI/4 constant | |
| 1437 Node *pi4 = makecon(TypeD::make(pi_4)); | |
| 1438 // Check PI/4 : abs(arg) | |
| 1439 Node *cmp = _gvn.transform(new (C, 3) CmpDNode(pi4,abs)); | |
| 1440 // Check: If PI/4 < abs(arg) then go slow | |
| 1441 Node *bol = _gvn.transform( new (C, 2) BoolNode( cmp, BoolTest::lt ) ); | |
| 1442 // Branch either way | |
| 1443 IfNode *iff = create_and_xform_if(control(),bol, PROB_STATIC_FREQUENT, COUNT_UNKNOWN); | |
| 1444 set_control(opt_iff(r,iff)); | |
| 1445 | |
| 1446 // Set fast path result | |
| 1447 phi->init_req(2,trig); | |
| 1448 | |
| 1449 // Slow path - non-blocking leaf call | |
| 1450 Node* call = NULL; | |
| 1451 switch (id) { | |
| 1452 case vmIntrinsics::_dsin: | |
| 1453 call = make_runtime_call(RC_LEAF, OptoRuntime::Math_D_D_Type(), | |
| 1454 CAST_FROM_FN_PTR(address, SharedRuntime::dsin), | |
| 1455 "Sin", NULL, arg, top()); | |
| 1456 break; | |
| 1457 case vmIntrinsics::_dcos: | |
| 1458 call = make_runtime_call(RC_LEAF, OptoRuntime::Math_D_D_Type(), | |
| 1459 CAST_FROM_FN_PTR(address, SharedRuntime::dcos), | |
| 1460 "Cos", NULL, arg, top()); | |
| 1461 break; | |
| 1462 case vmIntrinsics::_dtan: | |
| 1463 call = make_runtime_call(RC_LEAF, OptoRuntime::Math_D_D_Type(), | |
| 1464 CAST_FROM_FN_PTR(address, SharedRuntime::dtan), | |
| 1465 "Tan", NULL, arg, top()); | |
| 1466 break; | |
| 1467 } | |
| 1468 assert(control()->in(0) == call, ""); | |
| 1469 Node* slow_result = _gvn.transform(new (C, 1) ProjNode(call,TypeFunc::Parms)); | |
| 1470 r->init_req(1,control()); | |
| 1471 phi->init_req(1,slow_result); | |
| 1472 | |
| 1473 // Post-merge | |
| 1474 set_control(_gvn.transform(r)); | |
| 1475 record_for_igvn(r); | |
| 1476 trig = _gvn.transform(phi); | |
| 1477 | |
| 1478 C->set_has_split_ifs(true); // Has chance for split-if optimization | |
| 1479 } | |
| 1480 // Push result back on JVM stack | |
| 1481 push_pair(trig); | |
| 1482 return true; | |
| 1483 } | |
| 1484 | |
| 1485 //------------------------------inline_sqrt------------------------------------- | |
| 1486 // Inline square root instruction, if possible. | |
| 1487 bool LibraryCallKit::inline_sqrt(vmIntrinsics::ID id) { | |
| 1488 assert(id == vmIntrinsics::_dsqrt, "Not square root"); | |
| 1489 _sp += arg_size(); // restore stack pointer | |
| 1490 push_pair(_gvn.transform(new (C, 2) SqrtDNode(0, pop_math_arg()))); | |
| 1491 return true; | |
| 1492 } | |
| 1493 | |
| 1494 //------------------------------inline_abs------------------------------------- | |
| 1495 // Inline absolute value instruction, if possible. | |
| 1496 bool LibraryCallKit::inline_abs(vmIntrinsics::ID id) { | |
| 1497 assert(id == vmIntrinsics::_dabs, "Not absolute value"); | |
| 1498 _sp += arg_size(); // restore stack pointer | |
| 1499 push_pair(_gvn.transform(new (C, 2) AbsDNode(pop_math_arg()))); | |
| 1500 return true; | |
| 1501 } | |
| 1502 | |
| 1503 //------------------------------inline_exp------------------------------------- | |
| 1504 // Inline exp instructions, if possible. The Intel hardware only misses | |
| 1505 // really odd corner cases (+/- Infinity). Just uncommon-trap them. | |
| 1506 bool LibraryCallKit::inline_exp(vmIntrinsics::ID id) { | |
| 1507 assert(id == vmIntrinsics::_dexp, "Not exp"); | |
| 1508 | |
| 1509 // If this inlining ever returned NaN in the past, we do not intrinsify it | |
| 1510 // every again. NaN results requires StrictMath.exp handling. | |
| 1511 if (too_many_traps(Deoptimization::Reason_intrinsic)) return false; | |
| 1512 | |
| 1513 // Do not intrinsify on older platforms which lack cmove. | |
| 1514 if (ConditionalMoveLimit == 0) return false; | |
| 1515 | |
| 1516 _sp += arg_size(); // restore stack pointer | |
| 1517 Node *x = pop_math_arg(); | |
| 1518 Node *result = _gvn.transform(new (C, 2) ExpDNode(0,x)); | |
| 1519 | |
| 1520 //------------------- | |
| 1521 //result=(result.isNaN())? StrictMath::exp():result; | |
| 1522 // Check: If isNaN() by checking result!=result? then go to Strict Math | |
| 1523 Node* cmpisnan = _gvn.transform(new (C, 3) CmpDNode(result,result)); | |
| 1524 // Build the boolean node | |
| 1525 Node* bolisnum = _gvn.transform( new (C, 2) BoolNode(cmpisnan, BoolTest::eq) ); | |
| 1526 | |
| 1527 { BuildCutout unless(this, bolisnum, PROB_STATIC_FREQUENT); | |
| 1528 // End the current control-flow path | |
| 1529 push_pair(x); | |
| 1530 // Math.exp intrinsic returned a NaN, which requires StrictMath.exp | |
| 1531 // to handle. Recompile without intrinsifying Math.exp | |
| 1532 uncommon_trap(Deoptimization::Reason_intrinsic, | |
| 1533 Deoptimization::Action_make_not_entrant); | |
| 1534 } | |
| 1535 | |
| 1536 C->set_has_split_ifs(true); // Has chance for split-if optimization | |
| 1537 | |
| 1538 push_pair(result); | |
| 1539 | |
| 1540 return true; | |
| 1541 } | |
| 1542 | |
| 1543 //------------------------------inline_pow------------------------------------- | |
| 1544 // Inline power instructions, if possible. | |
| 1545 bool LibraryCallKit::inline_pow(vmIntrinsics::ID id) { | |
| 1546 assert(id == vmIntrinsics::_dpow, "Not pow"); | |
| 1547 | |
| 1548 // If this inlining ever returned NaN in the past, we do not intrinsify it | |
| 1549 // every again. NaN results requires StrictMath.pow handling. | |
| 1550 if (too_many_traps(Deoptimization::Reason_intrinsic)) return false; | |
| 1551 | |
| 1552 // Do not intrinsify on older platforms which lack cmove. | |
| 1553 if (ConditionalMoveLimit == 0) return false; | |
| 1554 | |
| 1555 // Pseudocode for pow | |
| 1556 // if (x <= 0.0) { | |
| 1557 // if ((double)((int)y)==y) { // if y is int | |
| 1558 // result = ((1&(int)y)==0)?-DPow(abs(x), y):DPow(abs(x), y) | |
| 1559 // } else { | |
| 1560 // result = NaN; | |
| 1561 // } | |
| 1562 // } else { | |
| 1563 // result = DPow(x,y); | |
| 1564 // } | |
| 1565 // if (result != result)? { | |
| 605 | 1566 // uncommon_trap(); |
| 0 | 1567 // } |
| 1568 // return result; | |
| 1569 | |
| 1570 _sp += arg_size(); // restore stack pointer | |
| 1571 Node* y = pop_math_arg(); | |
| 1572 Node* x = pop_math_arg(); | |
| 1573 | |
| 1574 Node *fast_result = _gvn.transform( new (C, 3) PowDNode(0, x, y) ); | |
| 1575 | |
| 1576 // Short form: if not top-level (i.e., Math.pow but inlining Math.pow | |
| 1577 // inside of something) then skip the fancy tests and just check for | |
| 1578 // NaN result. | |
| 1579 Node *result = NULL; | |
| 1580 if( jvms()->depth() >= 1 ) { | |
| 1581 result = fast_result; | |
| 1582 } else { | |
| 1583 | |
| 1584 // Set the merge point for If node with condition of (x <= 0.0) | |
| 1585 // There are four possible paths to region node and phi node | |
| 1586 RegionNode *r = new (C, 4) RegionNode(4); | |
| 1587 Node *phi = new (C, 4) PhiNode(r, Type::DOUBLE); | |
| 1588 | |
| 1589 // Build the first if node: if (x <= 0.0) | |
| 1590 // Node for 0 constant | |
| 1591 Node *zeronode = makecon(TypeD::ZERO); | |
| 1592 // Check x:0 | |
| 1593 Node *cmp = _gvn.transform(new (C, 3) CmpDNode(x, zeronode)); | |
| 1594 // Check: If (x<=0) then go complex path | |
| 1595 Node *bol1 = _gvn.transform( new (C, 2) BoolNode( cmp, BoolTest::le ) ); | |
| 1596 // Branch either way | |
| 1597 IfNode *if1 = create_and_xform_if(control(),bol1, PROB_STATIC_INFREQUENT, COUNT_UNKNOWN); | |
| 1598 Node *opt_test = _gvn.transform(if1); | |
| 1599 //assert( opt_test->is_If(), "Expect an IfNode"); | |
| 1600 IfNode *opt_if1 = (IfNode*)opt_test; | |
| 1601 // Fast path taken; set region slot 3 | |
| 1602 Node *fast_taken = _gvn.transform( new (C, 1) IfFalseNode(opt_if1) ); | |
| 1603 r->init_req(3,fast_taken); // Capture fast-control | |
| 1604 | |
| 1605 // Fast path not-taken, i.e. slow path | |
| 1606 Node *complex_path = _gvn.transform( new (C, 1) IfTrueNode(opt_if1) ); | |
| 1607 | |
| 1608 // Set fast path result | |
| 1609 Node *fast_result = _gvn.transform( new (C, 3) PowDNode(0, y, x) ); | |
| 1610 phi->init_req(3, fast_result); | |
| 1611 | |
| 1612 // Complex path | |
| 1613 // Build the second if node (if y is int) | |
| 1614 // Node for (int)y | |
| 1615 Node *inty = _gvn.transform( new (C, 2) ConvD2INode(y)); | |
| 1616 // Node for (double)((int) y) | |
| 1617 Node *doubleinty= _gvn.transform( new (C, 2) ConvI2DNode(inty)); | |
| 1618 // Check (double)((int) y) : y | |
| 1619 Node *cmpinty= _gvn.transform(new (C, 3) CmpDNode(doubleinty, y)); | |
| 1620 // Check if (y isn't int) then go to slow path | |
| 1621 | |
| 1622 Node *bol2 = _gvn.transform( new (C, 2) BoolNode( cmpinty, BoolTest::ne ) ); | |
| 605 | 1623 // Branch either way |
| 0 | 1624 IfNode *if2 = create_and_xform_if(complex_path,bol2, PROB_STATIC_INFREQUENT, COUNT_UNKNOWN); |
| 1625 Node *slow_path = opt_iff(r,if2); // Set region path 2 | |
| 1626 | |
| 1627 // Calculate DPow(abs(x), y)*(1 & (int)y) | |
| 1628 // Node for constant 1 | |
| 1629 Node *conone = intcon(1); | |
| 1630 // 1& (int)y | |
| 1631 Node *signnode= _gvn.transform( new (C, 3) AndINode(conone, inty) ); | |
| 1632 // zero node | |
| 1633 Node *conzero = intcon(0); | |
| 1634 // Check (1&(int)y)==0? | |
| 1635 Node *cmpeq1 = _gvn.transform(new (C, 3) CmpINode(signnode, conzero)); | |
| 1636 // Check if (1&(int)y)!=0?, if so the result is negative | |
| 1637 Node *bol3 = _gvn.transform( new (C, 2) BoolNode( cmpeq1, BoolTest::ne ) ); | |
| 1638 // abs(x) | |
| 1639 Node *absx=_gvn.transform( new (C, 2) AbsDNode(x)); | |
| 1640 // abs(x)^y | |
| 1641 Node *absxpowy = _gvn.transform( new (C, 3) PowDNode(0, y, absx) ); | |
| 1642 // -abs(x)^y | |
| 1643 Node *negabsxpowy = _gvn.transform(new (C, 2) NegDNode (absxpowy)); | |
| 1644 // (1&(int)y)==1?-DPow(abs(x), y):DPow(abs(x), y) | |
| 1645 Node *signresult = _gvn.transform( CMoveNode::make(C, NULL, bol3, absxpowy, negabsxpowy, Type::DOUBLE)); | |
| 1646 // Set complex path fast result | |
| 1647 phi->init_req(2, signresult); | |
| 1648 | |
| 1649 static const jlong nan_bits = CONST64(0x7ff8000000000000); | |
| 1650 Node *slow_result = makecon(TypeD::make(*(double*)&nan_bits)); // return NaN | |
| 1651 r->init_req(1,slow_path); | |
| 1652 phi->init_req(1,slow_result); | |
| 1653 | |
| 1654 // Post merge | |
| 1655 set_control(_gvn.transform(r)); | |
| 1656 record_for_igvn(r); | |
| 1657 result=_gvn.transform(phi); | |
| 1658 } | |
| 1659 | |
| 1660 //------------------- | |
| 1661 //result=(result.isNaN())? uncommon_trap():result; | |
| 1662 // Check: If isNaN() by checking result!=result? then go to Strict Math | |
| 1663 Node* cmpisnan = _gvn.transform(new (C, 3) CmpDNode(result,result)); | |
| 1664 // Build the boolean node | |
| 1665 Node* bolisnum = _gvn.transform( new (C, 2) BoolNode(cmpisnan, BoolTest::eq) ); | |
| 1666 | |
| 1667 { BuildCutout unless(this, bolisnum, PROB_STATIC_FREQUENT); | |
| 1668 // End the current control-flow path | |
| 1669 push_pair(x); | |
| 1670 push_pair(y); | |
| 1671 // Math.pow intrinsic returned a NaN, which requires StrictMath.pow | |
| 1672 // to handle. Recompile without intrinsifying Math.pow. | |
| 1673 uncommon_trap(Deoptimization::Reason_intrinsic, | |
| 1674 Deoptimization::Action_make_not_entrant); | |
| 1675 } | |
| 1676 | |
| 1677 C->set_has_split_ifs(true); // Has chance for split-if optimization | |
| 1678 | |
| 1679 push_pair(result); | |
| 1680 | |
| 1681 return true; | |
| 1682 } | |
| 1683 | |
| 1684 //------------------------------inline_trans------------------------------------- | |
| 1685 // Inline transcendental instructions, if possible. The Intel hardware gets | |
| 1686 // these right, no funny corner cases missed. | |
| 1687 bool LibraryCallKit::inline_trans(vmIntrinsics::ID id) { | |
| 1688 _sp += arg_size(); // restore stack pointer | |
| 1689 Node* arg = pop_math_arg(); | |
| 1690 Node* trans = NULL; | |
| 1691 | |
| 1692 switch (id) { | |
| 1693 case vmIntrinsics::_dlog: | |
| 1694 trans = _gvn.transform((Node*)new (C, 2) LogDNode(arg)); | |
| 1695 break; | |
| 1696 case vmIntrinsics::_dlog10: | |
| 1697 trans = _gvn.transform((Node*)new (C, 2) Log10DNode(arg)); | |
| 1698 break; | |
| 1699 default: | |
| 1700 assert(false, "bad intrinsic was passed in"); | |
| 1701 return false; | |
| 1702 } | |
| 1703 | |
| 1704 // Push result back on JVM stack | |
| 1705 push_pair(trans); | |
| 1706 return true; | |
| 1707 } | |
| 1708 | |
| 1709 //------------------------------runtime_math----------------------------- | |
| 1710 bool LibraryCallKit::runtime_math(const TypeFunc* call_type, address funcAddr, const char* funcName) { | |
| 1711 Node* a = NULL; | |
| 1712 Node* b = NULL; | |
| 1713 | |
| 1714 assert(call_type == OptoRuntime::Math_DD_D_Type() || call_type == OptoRuntime::Math_D_D_Type(), | |
| 1715 "must be (DD)D or (D)D type"); | |
| 1716 | |
| 1717 // Inputs | |
| 1718 _sp += arg_size(); // restore stack pointer | |
| 1719 if (call_type == OptoRuntime::Math_DD_D_Type()) { | |
| 1720 b = pop_math_arg(); | |
| 1721 } | |
| 1722 a = pop_math_arg(); | |
| 1723 | |
| 1724 const TypePtr* no_memory_effects = NULL; | |
| 1725 Node* trig = make_runtime_call(RC_LEAF, call_type, funcAddr, funcName, | |
| 1726 no_memory_effects, | |
| 1727 a, top(), b, b ? top() : NULL); | |
| 1728 Node* value = _gvn.transform(new (C, 1) ProjNode(trig, TypeFunc::Parms+0)); | |
| 1729 #ifdef ASSERT | |
| 1730 Node* value_top = _gvn.transform(new (C, 1) ProjNode(trig, TypeFunc::Parms+1)); | |
| 1731 assert(value_top == top(), "second value must be top"); | |
| 1732 #endif | |
| 1733 | |
| 1734 push_pair(value); | |
| 1735 return true; | |
| 1736 } | |
| 1737 | |
| 1738 //------------------------------inline_math_native----------------------------- | |
| 1739 bool LibraryCallKit::inline_math_native(vmIntrinsics::ID id) { | |
| 1740 switch (id) { | |
| 1741 // These intrinsics are not properly supported on all hardware | |
| 1742 case vmIntrinsics::_dcos: return Matcher::has_match_rule(Op_CosD) ? inline_trig(id) : | |
| 1743 runtime_math(OptoRuntime::Math_D_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dcos), "COS"); | |
| 1744 case vmIntrinsics::_dsin: return Matcher::has_match_rule(Op_SinD) ? inline_trig(id) : | |
| 1745 runtime_math(OptoRuntime::Math_D_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dsin), "SIN"); | |
| 1746 case vmIntrinsics::_dtan: return Matcher::has_match_rule(Op_TanD) ? inline_trig(id) : | |
| 1747 runtime_math(OptoRuntime::Math_D_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dtan), "TAN"); | |
| 1748 | |
| 1749 case vmIntrinsics::_dlog: return Matcher::has_match_rule(Op_LogD) ? inline_trans(id) : | |
| 1750 runtime_math(OptoRuntime::Math_D_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dlog), "LOG"); | |
| 1751 case vmIntrinsics::_dlog10: return Matcher::has_match_rule(Op_Log10D) ? inline_trans(id) : | |
| 1752 runtime_math(OptoRuntime::Math_D_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dlog10), "LOG10"); | |
| 1753 | |
| 1754 // These intrinsics are supported on all hardware | |
| 1755 case vmIntrinsics::_dsqrt: return Matcher::has_match_rule(Op_SqrtD) ? inline_sqrt(id) : false; | |
| 1756 case vmIntrinsics::_dabs: return Matcher::has_match_rule(Op_AbsD) ? inline_abs(id) : false; | |
| 1757 | |
| 1758 // These intrinsics don't work on X86. The ad implementation doesn't | |
| 1759 // handle NaN's properly. Instead of returning infinity, the ad | |
| 1760 // implementation returns a NaN on overflow. See bug: 6304089 | |
| 1761 // Once the ad implementations are fixed, change the code below | |
| 1762 // to match the intrinsics above | |
| 1763 | |
| 1764 case vmIntrinsics::_dexp: return | |
| 1765 runtime_math(OptoRuntime::Math_D_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dexp), "EXP"); | |
| 1766 case vmIntrinsics::_dpow: return | |
| 1767 runtime_math(OptoRuntime::Math_DD_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dpow), "POW"); | |
| 1768 | |
| 1769 // These intrinsics are not yet correctly implemented | |
| 1770 case vmIntrinsics::_datan2: | |
| 1771 return false; | |
| 1772 | |
| 1773 default: | |
| 1774 ShouldNotReachHere(); | |
| 1775 return false; | |
| 1776 } | |
| 1777 } | |
| 1778 | |
| 1779 static bool is_simple_name(Node* n) { | |
| 1780 return (n->req() == 1 // constant | |
| 1781 || (n->is_Type() && n->as_Type()->type()->singleton()) | |
| 1782 || n->is_Proj() // parameter or return value | |
| 1783 || n->is_Phi() // local of some sort | |
| 1784 ); | |
| 1785 } | |
| 1786 | |
| 1787 //----------------------------inline_min_max----------------------------------- | |
| 1788 bool LibraryCallKit::inline_min_max(vmIntrinsics::ID id) { | |
| 1789 push(generate_min_max(id, argument(0), argument(1))); | |
| 1790 | |
| 1791 return true; | |
| 1792 } | |
| 1793 | |
| 1794 Node* | |
| 1795 LibraryCallKit::generate_min_max(vmIntrinsics::ID id, Node* x0, Node* y0) { | |
| 1796 // These are the candidate return value: | |
| 1797 Node* xvalue = x0; | |
| 1798 Node* yvalue = y0; | |
| 1799 | |
| 1800 if (xvalue == yvalue) { | |
| 1801 return xvalue; | |
| 1802 } | |
| 1803 | |
| 1804 bool want_max = (id == vmIntrinsics::_max); | |
| 1805 | |
| 1806 const TypeInt* txvalue = _gvn.type(xvalue)->isa_int(); | |
| 1807 const TypeInt* tyvalue = _gvn.type(yvalue)->isa_int(); | |
| 1808 if (txvalue == NULL || tyvalue == NULL) return top(); | |
| 1809 // This is not really necessary, but it is consistent with a | |
| 1810 // hypothetical MaxINode::Value method: | |
| 1811 int widen = MAX2(txvalue->_widen, tyvalue->_widen); | |
| 1812 | |
| 1813 // %%% This folding logic should (ideally) be in a different place. | |
| 1814 // Some should be inside IfNode, and there to be a more reliable | |
| 1815 // transformation of ?: style patterns into cmoves. We also want | |
| 1816 // more powerful optimizations around cmove and min/max. | |
| 1817 | |
| 1818 // Try to find a dominating comparison of these guys. | |
| 1819 // It can simplify the index computation for Arrays.copyOf | |
| 1820 // and similar uses of System.arraycopy. | |
| 1821 // First, compute the normalized version of CmpI(x, y). | |
| 1822 int cmp_op = Op_CmpI; | |
| 1823 Node* xkey = xvalue; | |
| 1824 Node* ykey = yvalue; | |
| 1825 Node* ideal_cmpxy = _gvn.transform( new(C, 3) CmpINode(xkey, ykey) ); | |
| 1826 if (ideal_cmpxy->is_Cmp()) { | |
| 1827 // E.g., if we have CmpI(length - offset, count), | |
| 1828 // it might idealize to CmpI(length, count + offset) | |
| 1829 cmp_op = ideal_cmpxy->Opcode(); | |
| 1830 xkey = ideal_cmpxy->in(1); | |
| 1831 ykey = ideal_cmpxy->in(2); | |
| 1832 } | |
| 1833 | |
| 1834 // Start by locating any relevant comparisons. | |
| 1835 Node* start_from = (xkey->outcnt() < ykey->outcnt()) ? xkey : ykey; | |
| 1836 Node* cmpxy = NULL; | |
| 1837 Node* cmpyx = NULL; | |
| 1838 for (DUIterator_Fast kmax, k = start_from->fast_outs(kmax); k < kmax; k++) { | |
| 1839 Node* cmp = start_from->fast_out(k); | |
| 1840 if (cmp->outcnt() > 0 && // must have prior uses | |
| 1841 cmp->in(0) == NULL && // must be context-independent | |
| 1842 cmp->Opcode() == cmp_op) { // right kind of compare | |
| 1843 if (cmp->in(1) == xkey && cmp->in(2) == ykey) cmpxy = cmp; | |
| 1844 if (cmp->in(1) == ykey && cmp->in(2) == xkey) cmpyx = cmp; | |
| 1845 } | |
| 1846 } | |
| 1847 | |
| 1848 const int NCMPS = 2; | |
| 1849 Node* cmps[NCMPS] = { cmpxy, cmpyx }; | |
| 1850 int cmpn; | |
| 1851 for (cmpn = 0; cmpn < NCMPS; cmpn++) { | |
| 1852 if (cmps[cmpn] != NULL) break; // find a result | |
| 1853 } | |
| 1854 if (cmpn < NCMPS) { | |
| 1855 // Look for a dominating test that tells us the min and max. | |
| 1856 int depth = 0; // Limit search depth for speed | |
| 1857 Node* dom = control(); | |
| 1858 for (; dom != NULL; dom = IfNode::up_one_dom(dom, true)) { | |
| 1859 if (++depth >= 100) break; | |
| 1860 Node* ifproj = dom; | |
| 1861 if (!ifproj->is_Proj()) continue; | |
| 1862 Node* iff = ifproj->in(0); | |
| 1863 if (!iff->is_If()) continue; | |
| 1864 Node* bol = iff->in(1); | |
| 1865 if (!bol->is_Bool()) continue; | |
| 1866 Node* cmp = bol->in(1); | |
| 1867 if (cmp == NULL) continue; | |
| 1868 for (cmpn = 0; cmpn < NCMPS; cmpn++) | |
| 1869 if (cmps[cmpn] == cmp) break; | |
| 1870 if (cmpn == NCMPS) continue; | |
| 1871 BoolTest::mask btest = bol->as_Bool()->_test._test; | |
| 1872 if (ifproj->is_IfFalse()) btest = BoolTest(btest).negate(); | |
| 1873 if (cmp->in(1) == ykey) btest = BoolTest(btest).commute(); | |
| 1874 // At this point, we know that 'x btest y' is true. | |
| 1875 switch (btest) { | |
| 1876 case BoolTest::eq: | |
| 1877 // They are proven equal, so we can collapse the min/max. | |
| 1878 // Either value is the answer. Choose the simpler. | |
| 1879 if (is_simple_name(yvalue) && !is_simple_name(xvalue)) | |
| 1880 return yvalue; | |
| 1881 return xvalue; | |
| 1882 case BoolTest::lt: // x < y | |
| 1883 case BoolTest::le: // x <= y | |
| 1884 return (want_max ? yvalue : xvalue); | |
| 1885 case BoolTest::gt: // x > y | |
| 1886 case BoolTest::ge: // x >= y | |
| 1887 return (want_max ? xvalue : yvalue); | |
| 1888 } | |
| 1889 } | |
| 1890 } | |
| 1891 | |
| 1892 // We failed to find a dominating test. | |
| 1893 // Let's pick a test that might GVN with prior tests. | |
| 1894 Node* best_bol = NULL; | |
| 1895 BoolTest::mask best_btest = BoolTest::illegal; | |
| 1896 for (cmpn = 0; cmpn < NCMPS; cmpn++) { | |
| 1897 Node* cmp = cmps[cmpn]; | |
| 1898 if (cmp == NULL) continue; | |
| 1899 for (DUIterator_Fast jmax, j = cmp->fast_outs(jmax); j < jmax; j++) { | |
| 1900 Node* bol = cmp->fast_out(j); | |
| 1901 if (!bol->is_Bool()) continue; | |
| 1902 BoolTest::mask btest = bol->as_Bool()->_test._test; | |
| 1903 if (btest == BoolTest::eq || btest == BoolTest::ne) continue; | |
| 1904 if (cmp->in(1) == ykey) btest = BoolTest(btest).commute(); | |
| 1905 if (bol->outcnt() > (best_bol == NULL ? 0 : best_bol->outcnt())) { | |
| 1906 best_bol = bol->as_Bool(); | |
| 1907 best_btest = btest; | |
| 1908 } | |
| 1909 } | |
| 1910 } | |
| 1911 | |
| 1912 Node* answer_if_true = NULL; | |
| 1913 Node* answer_if_false = NULL; | |
| 1914 switch (best_btest) { | |
| 1915 default: | |
| 1916 if (cmpxy == NULL) | |
| 1917 cmpxy = ideal_cmpxy; | |
| 1918 best_bol = _gvn.transform( new(C, 2) BoolNode(cmpxy, BoolTest::lt) ); | |
| 1919 // and fall through: | |
| 1920 case BoolTest::lt: // x < y | |
| 1921 case BoolTest::le: // x <= y | |
| 1922 answer_if_true = (want_max ? yvalue : xvalue); | |
| 1923 answer_if_false = (want_max ? xvalue : yvalue); | |
| 1924 break; | |
| 1925 case BoolTest::gt: // x > y | |
| 1926 case BoolTest::ge: // x >= y | |
| 1927 answer_if_true = (want_max ? xvalue : yvalue); | |
| 1928 answer_if_false = (want_max ? yvalue : xvalue); | |
| 1929 break; | |
| 1930 } | |
| 1931 | |
| 1932 jint hi, lo; | |
| 1933 if (want_max) { | |
| 1934 // We can sharpen the minimum. | |
| 1935 hi = MAX2(txvalue->_hi, tyvalue->_hi); | |
| 1936 lo = MAX2(txvalue->_lo, tyvalue->_lo); | |
| 1937 } else { | |
| 1938 // We can sharpen the maximum. | |
| 1939 hi = MIN2(txvalue->_hi, tyvalue->_hi); | |
| 1940 lo = MIN2(txvalue->_lo, tyvalue->_lo); | |
| 1941 } | |
| 1942 | |
| 1943 // Use a flow-free graph structure, to avoid creating excess control edges | |
| 1944 // which could hinder other optimizations. | |
| 1945 // Since Math.min/max is often used with arraycopy, we want | |
| 1946 // tightly_coupled_allocation to be able to see beyond min/max expressions. | |
| 1947 Node* cmov = CMoveNode::make(C, NULL, best_bol, | |
| 1948 answer_if_false, answer_if_true, | |
| 1949 TypeInt::make(lo, hi, widen)); | |
| 1950 | |
| 1951 return _gvn.transform(cmov); | |
| 1952 | |
| 1953 /* | |
| 1954 // This is not as desirable as it may seem, since Min and Max | |
| 1955 // nodes do not have a full set of optimizations. | |
| 1956 // And they would interfere, anyway, with 'if' optimizations | |
| 1957 // and with CMoveI canonical forms. | |
| 1958 switch (id) { | |
| 1959 case vmIntrinsics::_min: | |
| 1960 result_val = _gvn.transform(new (C, 3) MinINode(x,y)); break; | |
| 1961 case vmIntrinsics::_max: | |
| 1962 result_val = _gvn.transform(new (C, 3) MaxINode(x,y)); break; | |
| 1963 default: | |
| 1964 ShouldNotReachHere(); | |
| 1965 } | |
| 1966 */ | |
| 1967 } | |
| 1968 | |
| 1969 inline int | |
| 1970 LibraryCallKit::classify_unsafe_addr(Node* &base, Node* &offset) { | |
| 1971 const TypePtr* base_type = TypePtr::NULL_PTR; | |
| 1972 if (base != NULL) base_type = _gvn.type(base)->isa_ptr(); | |
| 1973 if (base_type == NULL) { | |
| 1974 // Unknown type. | |
| 1975 return Type::AnyPtr; | |
| 1976 } else if (base_type == TypePtr::NULL_PTR) { | |
| 1977 // Since this is a NULL+long form, we have to switch to a rawptr. | |
| 1978 base = _gvn.transform( new (C, 2) CastX2PNode(offset) ); | |
| 1979 offset = MakeConX(0); | |
| 1980 return Type::RawPtr; | |
| 1981 } else if (base_type->base() == Type::RawPtr) { | |
| 1982 return Type::RawPtr; | |
| 1983 } else if (base_type->isa_oopptr()) { | |
| 1984 // Base is never null => always a heap address. | |
| 1985 if (base_type->ptr() == TypePtr::NotNull) { | |
| 1986 return Type::OopPtr; | |
| 1987 } | |
| 1988 // Offset is small => always a heap address. | |
| 1989 const TypeX* offset_type = _gvn.type(offset)->isa_intptr_t(); | |
| 1990 if (offset_type != NULL && | |
| 1991 base_type->offset() == 0 && // (should always be?) | |
| 1992 offset_type->_lo >= 0 && | |
| 1993 !MacroAssembler::needs_explicit_null_check(offset_type->_hi)) { | |
| 1994 return Type::OopPtr; | |
| 1995 } | |
| 1996 // Otherwise, it might either be oop+off or NULL+addr. | |
| 1997 return Type::AnyPtr; | |
| 1998 } else { | |
| 1999 // No information: | |
| 2000 return Type::AnyPtr; | |
| 2001 } | |
| 2002 } | |
| 2003 | |
| 2004 inline Node* LibraryCallKit::make_unsafe_address(Node* base, Node* offset) { | |
| 2005 int kind = classify_unsafe_addr(base, offset); | |
| 2006 if (kind == Type::RawPtr) { | |
| 2007 return basic_plus_adr(top(), base, offset); | |
| 2008 } else { | |
| 2009 return basic_plus_adr(base, offset); | |
| 2010 } | |
| 2011 } | |
| 2012 | |
|
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2013 //-------------------inline_numberOfLeadingZeros_int/long----------------------- |
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2014 // inline int Integer.numberOfLeadingZeros(int) |
|
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2015 // inline int Long.numberOfLeadingZeros(long) |
|
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2016 bool LibraryCallKit::inline_numberOfLeadingZeros(vmIntrinsics::ID id) { |
|
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2017 assert(id == vmIntrinsics::_numberOfLeadingZeros_i || id == vmIntrinsics::_numberOfLeadingZeros_l, "not numberOfLeadingZeros"); |
|
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2018 if (id == vmIntrinsics::_numberOfLeadingZeros_i && !Matcher::match_rule_supported(Op_CountLeadingZerosI)) return false; |
|
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2019 if (id == vmIntrinsics::_numberOfLeadingZeros_l && !Matcher::match_rule_supported(Op_CountLeadingZerosL)) return false; |
|
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2020 _sp += arg_size(); // restore stack pointer |
|
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|
2021 switch (id) { |
|
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|
2022 case vmIntrinsics::_numberOfLeadingZeros_i: |
|
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|
2023 push(_gvn.transform(new (C, 2) CountLeadingZerosINode(pop()))); |
|
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|
2024 break; |
|
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|
2025 case vmIntrinsics::_numberOfLeadingZeros_l: |
|
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|
2026 push(_gvn.transform(new (C, 2) CountLeadingZerosLNode(pop_pair()))); |
|
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|
2027 break; |
|
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|
2028 default: |
|
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|
2029 ShouldNotReachHere(); |
|
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|
2030 } |
|
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|
2031 return true; |
|
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|
2032 } |
|
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|
2033 |
|
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|
2034 //-------------------inline_numberOfTrailingZeros_int/long---------------------- |
|
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|
2035 // inline int Integer.numberOfTrailingZeros(int) |
|
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|
2036 // inline int Long.numberOfTrailingZeros(long) |
|
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|
2037 bool LibraryCallKit::inline_numberOfTrailingZeros(vmIntrinsics::ID id) { |
|
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6823354: Add intrinsics for {Integer,Long}.{numberOfLeadingZeros,numberOfTrailingZeros}()
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|
2038 assert(id == vmIntrinsics::_numberOfTrailingZeros_i || id == vmIntrinsics::_numberOfTrailingZeros_l, "not numberOfTrailingZeros"); |
|
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6823354: Add intrinsics for {Integer,Long}.{numberOfLeadingZeros,numberOfTrailingZeros}()
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|
2039 if (id == vmIntrinsics::_numberOfTrailingZeros_i && !Matcher::match_rule_supported(Op_CountTrailingZerosI)) return false; |
|
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6823354: Add intrinsics for {Integer,Long}.{numberOfLeadingZeros,numberOfTrailingZeros}()
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|
2040 if (id == vmIntrinsics::_numberOfTrailingZeros_l && !Matcher::match_rule_supported(Op_CountTrailingZerosL)) return false; |
|
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6823354: Add intrinsics for {Integer,Long}.{numberOfLeadingZeros,numberOfTrailingZeros}()
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|
2041 _sp += arg_size(); // restore stack pointer |
|
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|
2042 switch (id) { |
|
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|
2043 case vmIntrinsics::_numberOfTrailingZeros_i: |
|
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|
2044 push(_gvn.transform(new (C, 2) CountTrailingZerosINode(pop()))); |
|
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|
2045 break; |
|
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|
2046 case vmIntrinsics::_numberOfTrailingZeros_l: |
|
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|
2047 push(_gvn.transform(new (C, 2) CountTrailingZerosLNode(pop_pair()))); |
|
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|
2048 break; |
|
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|
2049 default: |
|
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|
2050 ShouldNotReachHere(); |
|
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6823354: Add intrinsics for {Integer,Long}.{numberOfLeadingZeros,numberOfTrailingZeros}()
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|
2051 } |
|
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|
2052 return true; |
|
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|
2053 } |
|
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|
2054 |
|
643
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|
2055 //----------------------------inline_bitCount_int/long----------------------- |
|
c771b7f43bbf
6378821: bitCount() should use POPC on SPARC processors and AMD+10h
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|
2056 // inline int Integer.bitCount(int) |
|
c771b7f43bbf
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|
2057 // inline int Long.bitCount(long) |
|
c771b7f43bbf
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|
2058 bool LibraryCallKit::inline_bitCount(vmIntrinsics::ID id) { |
|
c771b7f43bbf
6378821: bitCount() should use POPC on SPARC processors and AMD+10h
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|
2059 assert(id == vmIntrinsics::_bitCount_i || id == vmIntrinsics::_bitCount_l, "not bitCount"); |
|
c771b7f43bbf
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|
2060 if (id == vmIntrinsics::_bitCount_i && !Matcher::has_match_rule(Op_PopCountI)) return false; |
|
c771b7f43bbf
6378821: bitCount() should use POPC on SPARC processors and AMD+10h
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|
2061 if (id == vmIntrinsics::_bitCount_l && !Matcher::has_match_rule(Op_PopCountL)) return false; |
|
c771b7f43bbf
6378821: bitCount() should use POPC on SPARC processors and AMD+10h
twisti
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|
2062 _sp += arg_size(); // restore stack pointer |
|
c771b7f43bbf
6378821: bitCount() should use POPC on SPARC processors and AMD+10h
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|
2063 switch (id) { |
|
c771b7f43bbf
6378821: bitCount() should use POPC on SPARC processors and AMD+10h
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|
2064 case vmIntrinsics::_bitCount_i: |
|
c771b7f43bbf
6378821: bitCount() should use POPC on SPARC processors and AMD+10h
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|
2065 push(_gvn.transform(new (C, 2) PopCountINode(pop()))); |
|
c771b7f43bbf
6378821: bitCount() should use POPC on SPARC processors and AMD+10h
twisti
parents:
605
diff
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|
2066 break; |
|
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6378821: bitCount() should use POPC on SPARC processors and AMD+10h
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|
2067 case vmIntrinsics::_bitCount_l: |
|
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6378821: bitCount() should use POPC on SPARC processors and AMD+10h
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|
2068 push(_gvn.transform(new (C, 2) PopCountLNode(pop_pair()))); |
|
c771b7f43bbf
6378821: bitCount() should use POPC on SPARC processors and AMD+10h
twisti
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diff
changeset
|
2069 break; |
|
c771b7f43bbf
6378821: bitCount() should use POPC on SPARC processors and AMD+10h
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diff
changeset
|
2070 default: |
|
c771b7f43bbf
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|
2071 ShouldNotReachHere(); |
|
c771b7f43bbf
6378821: bitCount() should use POPC on SPARC processors and AMD+10h
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605
diff
changeset
|
2072 } |
|
c771b7f43bbf
6378821: bitCount() should use POPC on SPARC processors and AMD+10h
twisti
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diff
changeset
|
2073 return true; |
|
c771b7f43bbf
6378821: bitCount() should use POPC on SPARC processors and AMD+10h
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diff
changeset
|
2074 } |
|
c771b7f43bbf
6378821: bitCount() should use POPC on SPARC processors and AMD+10h
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|
2075 |
|
1396
d7f654633cfe
6946040: add intrinsic for short and char reverseBytes
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diff
changeset
|
2076 //----------------------------inline_reverseBytes_int/long/char/short------------------- |
| 605 | 2077 // inline Integer.reverseBytes(int) |
| 2078 // inline Long.reverseBytes(long) | |
|
1396
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6946040: add intrinsic for short and char reverseBytes
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parents:
1152
diff
changeset
|
2079 // inline Character.reverseBytes(char) |
|
d7f654633cfe
6946040: add intrinsic for short and char reverseBytes
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parents:
1152
diff
changeset
|
2080 // inline Short.reverseBytes(short) |
| 0 | 2081 bool LibraryCallKit::inline_reverseBytes(vmIntrinsics::ID id) { |
|
1396
d7f654633cfe
6946040: add intrinsic for short and char reverseBytes
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diff
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|
2082 assert(id == vmIntrinsics::_reverseBytes_i || id == vmIntrinsics::_reverseBytes_l || |
|
d7f654633cfe
6946040: add intrinsic for short and char reverseBytes
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1152
diff
changeset
|
2083 id == vmIntrinsics::_reverseBytes_c || id == vmIntrinsics::_reverseBytes_s, |
|
d7f654633cfe
6946040: add intrinsic for short and char reverseBytes
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parents:
1152
diff
changeset
|
2084 "not reverse Bytes"); |
|
d7f654633cfe
6946040: add intrinsic for short and char reverseBytes
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parents:
1152
diff
changeset
|
2085 if (id == vmIntrinsics::_reverseBytes_i && !Matcher::has_match_rule(Op_ReverseBytesI)) return false; |
|
d7f654633cfe
6946040: add intrinsic for short and char reverseBytes
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parents:
1152
diff
changeset
|
2086 if (id == vmIntrinsics::_reverseBytes_l && !Matcher::has_match_rule(Op_ReverseBytesL)) return false; |
|
d7f654633cfe
6946040: add intrinsic for short and char reverseBytes
never
parents:
1152
diff
changeset
|
2087 if (id == vmIntrinsics::_reverseBytes_c && !Matcher::has_match_rule(Op_ReverseBytesUS)) return false; |
|
d7f654633cfe
6946040: add intrinsic for short and char reverseBytes
never
parents:
1152
diff
changeset
|
2088 if (id == vmIntrinsics::_reverseBytes_s && !Matcher::has_match_rule(Op_ReverseBytesS)) return false; |
| 0 | 2089 _sp += arg_size(); // restore stack pointer |
| 2090 switch (id) { | |
| 2091 case vmIntrinsics::_reverseBytes_i: | |
| 2092 push(_gvn.transform(new (C, 2) ReverseBytesINode(0, pop()))); | |
| 2093 break; | |
| 2094 case vmIntrinsics::_reverseBytes_l: | |
| 2095 push_pair(_gvn.transform(new (C, 2) ReverseBytesLNode(0, pop_pair()))); | |
| 2096 break; | |
|
1396
d7f654633cfe
6946040: add intrinsic for short and char reverseBytes
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parents:
1152
diff
changeset
|
2097 case vmIntrinsics::_reverseBytes_c: |
|
d7f654633cfe
6946040: add intrinsic for short and char reverseBytes
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parents:
1152
diff
changeset
|
2098 push(_gvn.transform(new (C, 2) ReverseBytesUSNode(0, pop()))); |
|
d7f654633cfe
6946040: add intrinsic for short and char reverseBytes
never
parents:
1152
diff
changeset
|
2099 break; |
|
d7f654633cfe
6946040: add intrinsic for short and char reverseBytes
never
parents:
1152
diff
changeset
|
2100 case vmIntrinsics::_reverseBytes_s: |
|
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6946040: add intrinsic for short and char reverseBytes
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parents:
1152
diff
changeset
|
2101 push(_gvn.transform(new (C, 2) ReverseBytesSNode(0, pop()))); |
|
d7f654633cfe
6946040: add intrinsic for short and char reverseBytes
never
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1152
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|
2102 break; |
| 0 | 2103 default: |
| 2104 ; | |
| 2105 } | |
| 2106 return true; | |
| 2107 } | |
| 2108 | |
| 2109 //----------------------------inline_unsafe_access---------------------------- | |
| 2110 | |
| 2111 const static BasicType T_ADDRESS_HOLDER = T_LONG; | |
| 2112 | |
|
3249
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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|
2113 // Helper that guards and inserts a G1 pre-barrier. |
|
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7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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|
2114 void LibraryCallKit::insert_g1_pre_barrier(Node* base_oop, Node* offset, Node* pre_val) { |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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|
2115 assert(UseG1GC, "should not call this otherwise"); |
|
e1162778c1c8
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|
2116 |
|
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7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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|
2117 // We could be accessing the referent field of a reference object. If so, when G1 |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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|
2118 // is enabled, we need to log the value in the referent field in an SATB buffer. |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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|
2119 // This routine performs some compile time filters and generates suitable |
|
e1162778c1c8
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|
2120 // runtime filters that guard the pre-barrier code. |
|
e1162778c1c8
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|
2121 |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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|
2122 // Some compile time checks. |
|
e1162778c1c8
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|
2123 |
|
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7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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|
2124 // If offset is a constant, is it java_lang_ref_Reference::_reference_offset? |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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|
2125 const TypeX* otype = offset->find_intptr_t_type(); |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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|
2126 if (otype != NULL && otype->is_con() && |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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|
2127 otype->get_con() != java_lang_ref_Reference::referent_offset) { |
|
e1162778c1c8
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|
2128 // Constant offset but not the reference_offset so just return |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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|
2129 return; |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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|
2130 } |
|
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|
2131 |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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|
2132 // We only need to generate the runtime guards for instances. |
|
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|
2133 const TypeOopPtr* btype = base_oop->bottom_type()->isa_oopptr(); |
|
e1162778c1c8
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|
2134 if (btype != NULL) { |
|
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|
2135 if (btype->isa_aryptr()) { |
|
e1162778c1c8
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|
2136 // Array type so nothing to do |
|
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|
2137 return; |
|
e1162778c1c8
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|
2138 } |
|
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|
2139 |
|
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|
2140 const TypeInstPtr* itype = btype->isa_instptr(); |
|
e1162778c1c8
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|
2141 if (itype != NULL) { |
|
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|
2142 // Can the klass of base_oop be statically determined |
|
e1162778c1c8
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|
2143 // to be _not_ a sub-class of Reference? |
|
e1162778c1c8
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|
2144 ciKlass* klass = itype->klass(); |
|
e1162778c1c8
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|
2145 if (klass->is_subtype_of(env()->Reference_klass()) && |
|
e1162778c1c8
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|
2146 !env()->Reference_klass()->is_subtype_of(klass)) { |
|
e1162778c1c8
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|
2147 return; |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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|
2148 } |
|
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|
2149 } |
|
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|
2150 } |
|
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|
2151 |
|
e1162778c1c8
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|
2152 // The compile time filters did not reject base_oop/offset so |
|
e1162778c1c8
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|
2153 // we need to generate the following runtime filters |
|
e1162778c1c8
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|
2154 // |
|
e1162778c1c8
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|
2155 // if (offset == java_lang_ref_Reference::_reference_offset) { |
|
e1162778c1c8
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|
2156 // if (base != null) { |
|
e1162778c1c8
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|
2157 // if (klass(base)->reference_type() != REF_NONE)) { |
|
e1162778c1c8
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|
2158 // pre_barrier(_, pre_val, ...); |
|
e1162778c1c8
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johnc
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|
2159 // } |
|
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|
2160 // } |
|
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|
2161 // } |
|
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|
2162 |
|
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johnc
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|
2163 float likely = PROB_LIKELY(0.999); |
|
e1162778c1c8
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johnc
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|
2164 float unlikely = PROB_UNLIKELY(0.999); |
|
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|
2165 |
| 3255 | 2166 IdealKit ideal(this); |
|
3249
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johnc
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|
2167 #define __ ideal. |
|
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|
2168 |
|
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|
2169 const int reference_type_offset = instanceKlass::reference_type_offset_in_bytes() + |
|
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|
2170 sizeof(oopDesc); |
|
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|
2171 |
|
3254
59766fd005ff
7035117: G1: nsk/stress/jni/jnistress002 fails with assertion failure
johnc
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3252
diff
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|
2172 Node* referent_off = __ ConX(java_lang_ref_Reference::referent_offset); |
|
3249
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|
2173 |
|
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|
2174 __ if_then(offset, BoolTest::eq, referent_off, unlikely); { |
|
e1162778c1c8
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|
2175 __ if_then(base_oop, BoolTest::ne, null(), likely); { |
|
e1162778c1c8
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|
2176 |
|
e1162778c1c8
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|
2177 // Update graphKit memory and control from IdealKit. |
| 3255 | 2178 sync_kit(ideal); |
|
3249
e1162778c1c8
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|
2179 |
|
e1162778c1c8
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|
2180 Node* ref_klass_con = makecon(TypeKlassPtr::make(env()->Reference_klass())); |
|
e1162778c1c8
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|
2181 Node* is_instof = gen_instanceof(base_oop, ref_klass_con); |
|
e1162778c1c8
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|
2182 |
|
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|
2183 // Update IdealKit memory and control from graphKit. |
| 3255 | 2184 __ sync_kit(this); |
|
3249
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|
2185 |
|
e1162778c1c8
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|
2186 Node* one = __ ConI(1); |
|
e1162778c1c8
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|
2187 |
|
e1162778c1c8
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|
2188 __ if_then(is_instof, BoolTest::eq, one, unlikely); { |
|
e1162778c1c8
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|
2189 |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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|
2190 // Update graphKit from IdeakKit. |
| 3255 | 2191 sync_kit(ideal); |
|
3249
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|
2192 |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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|
2193 // Use the pre-barrier to record the value in the referent field |
|
e1162778c1c8
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|
2194 pre_barrier(false /* do_load */, |
|
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|
2195 __ ctrl(), |
|
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|
2196 NULL /* obj */, NULL /* adr */, -1 /* alias_idx */, NULL /* val */, NULL /* val_type */, |
|
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|
2197 pre_val /* pre_val */, |
|
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|
2198 T_OBJECT); |
|
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|
2199 |
|
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|
2200 // Update IdealKit from graphKit. |
| 3255 | 2201 __ sync_kit(this); |
|
3249
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|
2202 |
|
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|
2203 } __ end_if(); // _ref_type != ref_none |
|
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|
2204 } __ end_if(); // base != NULL |
|
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|
2205 } __ end_if(); // offset == referent_offset |
|
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|
2206 |
|
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|
2207 // Final sync IdealKit and GraphKit. |
| 3255 | 2208 final_sync(ideal); |
|
3249
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|
2209 #undef __ |
|
e1162778c1c8
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|
2210 } |
|
e1162778c1c8
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|
2211 |
|
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|
2212 |
| 0 | 2213 // Interpret Unsafe.fieldOffset cookies correctly: |
| 2214 extern jlong Unsafe_field_offset_to_byte_offset(jlong field_offset); | |
| 2215 | |
| 2216 bool LibraryCallKit::inline_unsafe_access(bool is_native_ptr, bool is_store, BasicType type, bool is_volatile) { | |
| 2217 if (callee()->is_static()) return false; // caller must have the capability! | |
| 2218 | |
| 2219 #ifndef PRODUCT | |
| 2220 { | |
| 2221 ResourceMark rm; | |
| 2222 // Check the signatures. | |
| 2223 ciSignature* sig = signature(); | |
| 2224 #ifdef ASSERT | |
| 2225 if (!is_store) { | |
| 2226 // Object getObject(Object base, int/long offset), etc. | |
| 2227 BasicType rtype = sig->return_type()->basic_type(); | |
| 2228 if (rtype == T_ADDRESS_HOLDER && callee()->name() == ciSymbol::getAddress_name()) | |
| 2229 rtype = T_ADDRESS; // it is really a C void* | |
| 2230 assert(rtype == type, "getter must return the expected value"); | |
| 2231 if (!is_native_ptr) { | |
| 2232 assert(sig->count() == 2, "oop getter has 2 arguments"); | |
| 2233 assert(sig->type_at(0)->basic_type() == T_OBJECT, "getter base is object"); | |
| 2234 assert(sig->type_at(1)->basic_type() == T_LONG, "getter offset is correct"); | |
| 2235 } else { | |
| 2236 assert(sig->count() == 1, "native getter has 1 argument"); | |
| 2237 assert(sig->type_at(0)->basic_type() == T_LONG, "getter base is long"); | |
| 2238 } | |
| 2239 } else { | |
| 2240 // void putObject(Object base, int/long offset, Object x), etc. | |
| 2241 assert(sig->return_type()->basic_type() == T_VOID, "putter must not return a value"); | |
| 2242 if (!is_native_ptr) { | |
| 2243 assert(sig->count() == 3, "oop putter has 3 arguments"); | |
| 2244 assert(sig->type_at(0)->basic_type() == T_OBJECT, "putter base is object"); | |
| 2245 assert(sig->type_at(1)->basic_type() == T_LONG, "putter offset is correct"); | |
| 2246 } else { | |
| 2247 assert(sig->count() == 2, "native putter has 2 arguments"); | |
| 2248 assert(sig->type_at(0)->basic_type() == T_LONG, "putter base is long"); | |
| 2249 } | |
| 2250 BasicType vtype = sig->type_at(sig->count()-1)->basic_type(); | |
| 2251 if (vtype == T_ADDRESS_HOLDER && callee()->name() == ciSymbol::putAddress_name()) | |
| 2252 vtype = T_ADDRESS; // it is really a C void* | |
| 2253 assert(vtype == type, "putter must accept the expected value"); | |
| 2254 } | |
| 2255 #endif // ASSERT | |
| 2256 } | |
| 2257 #endif //PRODUCT | |
| 2258 | |
| 2259 C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe". | |
| 2260 | |
| 2261 int type_words = type2size[ (type == T_ADDRESS) ? T_LONG : type ]; | |
| 2262 | |
| 2263 // Argument words: "this" plus (oop/offset) or (lo/hi) args plus maybe 1 or 2 value words | |
| 2264 int nargs = 1 + (is_native_ptr ? 2 : 3) + (is_store ? type_words : 0); | |
| 2265 | |
| 2266 debug_only(int saved_sp = _sp); | |
| 2267 _sp += nargs; | |
| 2268 | |
| 2269 Node* val; | |
| 2270 debug_only(val = (Node*)(uintptr_t)-1); | |
| 2271 | |
| 2272 | |
| 2273 if (is_store) { | |
| 2274 // Get the value being stored. (Pop it first; it was pushed last.) | |
| 2275 switch (type) { | |
| 2276 case T_DOUBLE: | |
| 2277 case T_LONG: | |
| 2278 case T_ADDRESS: | |
| 2279 val = pop_pair(); | |
| 2280 break; | |
| 2281 default: | |
| 2282 val = pop(); | |
| 2283 } | |
| 2284 } | |
| 2285 | |
| 2286 // Build address expression. See the code in inline_unsafe_prefetch. | |
| 2287 Node *adr; | |
| 2288 Node *heap_base_oop = top(); | |
|
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|
2289 Node* offset = top(); |
|
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|
2290 |
| 0 | 2291 if (!is_native_ptr) { |
| 2292 // The offset is a value produced by Unsafe.staticFieldOffset or Unsafe.objectFieldOffset | |
|
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|
2293 offset = pop_pair(); |
| 0 | 2294 // The base is either a Java object or a value produced by Unsafe.staticFieldBase |
| 2295 Node* base = pop(); | |
| 2296 // We currently rely on the cookies produced by Unsafe.xxxFieldOffset | |
| 2297 // to be plain byte offsets, which are also the same as those accepted | |
| 2298 // by oopDesc::field_base. | |
| 2299 assert(Unsafe_field_offset_to_byte_offset(11) == 11, | |
| 2300 "fieldOffset must be byte-scaled"); | |
| 2301 // 32-bit machines ignore the high half! | |
| 2302 offset = ConvL2X(offset); | |
| 2303 adr = make_unsafe_address(base, offset); | |
| 2304 heap_base_oop = base; | |
| 2305 } else { | |
| 2306 Node* ptr = pop_pair(); | |
| 2307 // Adjust Java long to machine word: | |
| 2308 ptr = ConvL2X(ptr); | |
| 2309 adr = make_unsafe_address(NULL, ptr); | |
| 2310 } | |
| 2311 | |
| 2312 // Pop receiver last: it was pushed first. | |
| 2313 Node *receiver = pop(); | |
| 2314 | |
| 2315 assert(saved_sp == _sp, "must have correct argument count"); | |
| 2316 | |
| 2317 const TypePtr *adr_type = _gvn.type(adr)->isa_ptr(); | |
| 2318 | |
| 2319 // First guess at the value type. | |
| 2320 const Type *value_type = Type::get_const_basic_type(type); | |
| 2321 | |
| 2322 // Try to categorize the address. If it comes up as TypeJavaPtr::BOTTOM, | |
| 2323 // there was not enough information to nail it down. | |
| 2324 Compile::AliasType* alias_type = C->alias_type(adr_type); | |
| 2325 assert(alias_type->index() != Compile::AliasIdxBot, "no bare pointers here"); | |
| 2326 | |
| 2327 // We will need memory barriers unless we can determine a unique | |
| 2328 // alias category for this reference. (Note: If for some reason | |
| 2329 // the barriers get omitted and the unsafe reference begins to "pollute" | |
| 2330 // the alias analysis of the rest of the graph, either Compile::can_alias | |
| 2331 // or Compile::must_alias will throw a diagnostic assert.) | |
| 2332 bool need_mem_bar = (alias_type->adr_type() == TypeOopPtr::BOTTOM); | |
| 2333 | |
|
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|
2334 // If we are reading the value of the referent field of a Reference |
|
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|
2335 // object (either by using Unsafe directly or through reflection) |
|
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|
2336 // then, if G1 is enabled, we need to record the referent in an |
|
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|
2337 // SATB log buffer using the pre-barrier mechanism. |
|
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|
2338 bool need_read_barrier = UseG1GC && !is_native_ptr && !is_store && |
|
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|
2339 offset != top() && heap_base_oop != top(); |
|
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|
2340 |
| 0 | 2341 if (!is_store && type == T_OBJECT) { |
| 2342 // Attempt to infer a sharper value type from the offset and base type. | |
| 2343 ciKlass* sharpened_klass = NULL; | |
| 2344 | |
| 2345 // See if it is an instance field, with an object type. | |
| 2346 if (alias_type->field() != NULL) { | |
| 2347 assert(!is_native_ptr, "native pointer op cannot use a java address"); | |
| 2348 if (alias_type->field()->type()->is_klass()) { | |
| 2349 sharpened_klass = alias_type->field()->type()->as_klass(); | |
| 2350 } | |
| 2351 } | |
| 2352 | |
| 2353 // See if it is a narrow oop array. | |
| 2354 if (adr_type->isa_aryptr()) { | |
|
895
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|
2355 if (adr_type->offset() >= objArrayOopDesc::base_offset_in_bytes()) { |
| 0 | 2356 const TypeOopPtr *elem_type = adr_type->is_aryptr()->elem()->isa_oopptr(); |
| 2357 if (elem_type != NULL) { | |
| 2358 sharpened_klass = elem_type->klass(); | |
| 2359 } | |
| 2360 } | |
| 2361 } | |
| 2362 | |
| 2363 if (sharpened_klass != NULL) { | |
| 2364 const TypeOopPtr* tjp = TypeOopPtr::make_from_klass(sharpened_klass); | |
| 2365 | |
| 2366 // Sharpen the value type. | |
| 2367 value_type = tjp; | |
| 2368 | |
| 2369 #ifndef PRODUCT | |
| 2370 if (PrintIntrinsics || PrintInlining || PrintOptoInlining) { | |
| 2371 tty->print(" from base type: "); adr_type->dump(); | |
| 2372 tty->print(" sharpened value: "); value_type->dump(); | |
| 2373 } | |
| 2374 #endif | |
| 2375 } | |
| 2376 } | |
| 2377 | |
| 2378 // Null check on self without removing any arguments. The argument | |
| 2379 // null check technically happens in the wrong place, which can lead to | |
| 2380 // invalid stack traces when the primitive is inlined into a method | |
| 2381 // which handles NullPointerExceptions. | |
| 2382 _sp += nargs; | |
| 2383 do_null_check(receiver, T_OBJECT); | |
| 2384 _sp -= nargs; | |
| 2385 if (stopped()) { | |
| 2386 return true; | |
| 2387 } | |
| 2388 // Heap pointers get a null-check from the interpreter, | |
| 2389 // as a courtesy. However, this is not guaranteed by Unsafe, | |
| 2390 // and it is not possible to fully distinguish unintended nulls | |
| 2391 // from intended ones in this API. | |
| 2392 | |
| 2393 if (is_volatile) { | |
| 2394 // We need to emit leading and trailing CPU membars (see below) in | |
| 2395 // addition to memory membars when is_volatile. This is a little | |
| 2396 // too strong, but avoids the need to insert per-alias-type | |
| 2397 // volatile membars (for stores; compare Parse::do_put_xxx), which | |
| 605 | 2398 // we cannot do effectively here because we probably only have a |
| 0 | 2399 // rough approximation of type. |
| 2400 need_mem_bar = true; | |
| 2401 // For Stores, place a memory ordering barrier now. | |
| 2402 if (is_store) | |
| 2403 insert_mem_bar(Op_MemBarRelease); | |
| 2404 } | |
| 2405 | |
| 2406 // Memory barrier to prevent normal and 'unsafe' accesses from | |
| 2407 // bypassing each other. Happens after null checks, so the | |
| 2408 // exception paths do not take memory state from the memory barrier, | |
| 2409 // so there's no problems making a strong assert about mixing users | |
| 2410 // of safe & unsafe memory. Otherwise fails in a CTW of rt.jar | |
| 2411 // around 5701, class sun/reflect/UnsafeBooleanFieldAccessorImpl. | |
| 2412 if (need_mem_bar) insert_mem_bar(Op_MemBarCPUOrder); | |
| 2413 | |
| 2414 if (!is_store) { | |
| 2415 Node* p = make_load(control(), adr, value_type, type, adr_type, is_volatile); | |
| 2416 // load value and push onto stack | |
| 2417 switch (type) { | |
| 2418 case T_BOOLEAN: | |
| 2419 case T_CHAR: | |
| 2420 case T_BYTE: | |
| 2421 case T_SHORT: | |
| 2422 case T_INT: | |
| 2423 case T_FLOAT: | |
|
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2424 push(p); |
|
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|
2425 break; |
| 0 | 2426 case T_OBJECT: |
|
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|
2427 if (need_read_barrier) { |
|
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|
2428 insert_g1_pre_barrier(heap_base_oop, offset, p); |
|
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|
2429 } |
|
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|
2430 push(p); |
| 0 | 2431 break; |
| 2432 case T_ADDRESS: | |
| 2433 // Cast to an int type. | |
| 2434 p = _gvn.transform( new (C, 2) CastP2XNode(NULL,p) ); | |
| 2435 p = ConvX2L(p); | |
| 2436 push_pair(p); | |
| 2437 break; | |
| 2438 case T_DOUBLE: | |
| 2439 case T_LONG: | |
| 2440 push_pair( p ); | |
| 2441 break; | |
| 2442 default: ShouldNotReachHere(); | |
| 2443 } | |
| 2444 } else { | |
| 2445 // place effect of store into memory | |
| 2446 switch (type) { | |
| 2447 case T_DOUBLE: | |
| 2448 val = dstore_rounding(val); | |
| 2449 break; | |
| 2450 case T_ADDRESS: | |
| 2451 // Repackage the long as a pointer. | |
| 2452 val = ConvL2X(val); | |
| 2453 val = _gvn.transform( new (C, 2) CastX2PNode(val) ); | |
| 2454 break; | |
| 2455 } | |
| 2456 | |
| 2457 if (type != T_OBJECT ) { | |
| 2458 (void) store_to_memory(control(), adr, val, type, adr_type, is_volatile); | |
| 2459 } else { | |
| 2460 // Possibly an oop being stored to Java heap or native memory | |
| 2461 if (!TypePtr::NULL_PTR->higher_equal(_gvn.type(heap_base_oop))) { | |
| 2462 // oop to Java heap. | |
| 825 | 2463 (void) store_oop_to_unknown(control(), heap_base_oop, adr, adr_type, val, type); |
| 0 | 2464 } else { |
| 2465 // We can't tell at compile time if we are storing in the Java heap or outside | |
| 2466 // of it. So we need to emit code to conditionally do the proper type of | |
| 2467 // store. | |
| 2468 | |
|
2444
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|
2469 IdealKit ideal(this); |
|
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|
2470 #define __ ideal. |
| 0 | 2471 // QQQ who knows what probability is here?? |
|
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|
2472 __ if_then(heap_base_oop, BoolTest::ne, null(), PROB_UNLIKELY(0.999)); { |
|
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|
2473 // Sync IdealKit and graphKit. |
|
2444
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|
2474 sync_kit(ideal); |
|
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|
2475 Node* st = store_oop_to_unknown(control(), heap_base_oop, adr, adr_type, val, type); |
|
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|
2476 // Update IdealKit memory. |
|
2444
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|
2477 __ sync_kit(this); |
|
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|
2478 } __ else_(); { |
|
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|
2479 __ store(__ ctrl(), adr, val, type, alias_type->index(), is_volatile); |
|
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|
2480 } __ end_if(); |
|
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|
2481 // Final sync IdealKit and GraphKit. |
|
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|
2482 final_sync(ideal); |
|
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|
2483 #undef __ |
| 0 | 2484 } |
| 2485 } | |
| 2486 } | |
| 2487 | |
| 2488 if (is_volatile) { | |
| 2489 if (!is_store) | |
| 2490 insert_mem_bar(Op_MemBarAcquire); | |
| 2491 else | |
| 2492 insert_mem_bar(Op_MemBarVolatile); | |
| 2493 } | |
| 2494 | |
| 2495 if (need_mem_bar) insert_mem_bar(Op_MemBarCPUOrder); | |
| 2496 | |
| 2497 return true; | |
| 2498 } | |
| 2499 | |
| 2500 //----------------------------inline_unsafe_prefetch---------------------------- | |
| 2501 | |
| 2502 bool LibraryCallKit::inline_unsafe_prefetch(bool is_native_ptr, bool is_store, bool is_static) { | |
| 2503 #ifndef PRODUCT | |
| 2504 { | |
| 2505 ResourceMark rm; | |
| 2506 // Check the signatures. | |
| 2507 ciSignature* sig = signature(); | |
| 2508 #ifdef ASSERT | |
| 2509 // Object getObject(Object base, int/long offset), etc. | |
| 2510 BasicType rtype = sig->return_type()->basic_type(); | |
| 2511 if (!is_native_ptr) { | |
| 2512 assert(sig->count() == 2, "oop prefetch has 2 arguments"); | |
| 2513 assert(sig->type_at(0)->basic_type() == T_OBJECT, "prefetch base is object"); | |
| 2514 assert(sig->type_at(1)->basic_type() == T_LONG, "prefetcha offset is correct"); | |
| 2515 } else { | |
| 2516 assert(sig->count() == 1, "native prefetch has 1 argument"); | |
| 2517 assert(sig->type_at(0)->basic_type() == T_LONG, "prefetch base is long"); | |
| 2518 } | |
| 2519 #endif // ASSERT | |
| 2520 } | |
| 2521 #endif // !PRODUCT | |
| 2522 | |
| 2523 C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe". | |
| 2524 | |
| 2525 // Argument words: "this" if not static, plus (oop/offset) or (lo/hi) args | |
| 2526 int nargs = (is_static ? 0 : 1) + (is_native_ptr ? 2 : 3); | |
| 2527 | |
| 2528 debug_only(int saved_sp = _sp); | |
| 2529 _sp += nargs; | |
| 2530 | |
| 2531 // Build address expression. See the code in inline_unsafe_access. | |
| 2532 Node *adr; | |
| 2533 if (!is_native_ptr) { | |
| 2534 // The offset is a value produced by Unsafe.staticFieldOffset or Unsafe.objectFieldOffset | |
| 2535 Node* offset = pop_pair(); | |
| 2536 // The base is either a Java object or a value produced by Unsafe.staticFieldBase | |
| 2537 Node* base = pop(); | |
| 2538 // We currently rely on the cookies produced by Unsafe.xxxFieldOffset | |
| 2539 // to be plain byte offsets, which are also the same as those accepted | |
| 2540 // by oopDesc::field_base. | |
| 2541 assert(Unsafe_field_offset_to_byte_offset(11) == 11, | |
| 2542 "fieldOffset must be byte-scaled"); | |
| 2543 // 32-bit machines ignore the high half! | |
| 2544 offset = ConvL2X(offset); | |
| 2545 adr = make_unsafe_address(base, offset); | |
| 2546 } else { | |
| 2547 Node* ptr = pop_pair(); | |
| 2548 // Adjust Java long to machine word: | |
| 2549 ptr = ConvL2X(ptr); | |
| 2550 adr = make_unsafe_address(NULL, ptr); | |
| 2551 } | |
| 2552 | |
| 2553 if (is_static) { | |
| 2554 assert(saved_sp == _sp, "must have correct argument count"); | |
| 2555 } else { | |
| 2556 // Pop receiver last: it was pushed first. | |
| 2557 Node *receiver = pop(); | |
| 2558 assert(saved_sp == _sp, "must have correct argument count"); | |
| 2559 | |
| 2560 // Null check on self without removing any arguments. The argument | |
| 2561 // null check technically happens in the wrong place, which can lead to | |
| 2562 // invalid stack traces when the primitive is inlined into a method | |
| 2563 // which handles NullPointerExceptions. | |
| 2564 _sp += nargs; | |
| 2565 do_null_check(receiver, T_OBJECT); | |
| 2566 _sp -= nargs; | |
| 2567 if (stopped()) { | |
| 2568 return true; | |
| 2569 } | |
| 2570 } | |
| 2571 | |
| 2572 // Generate the read or write prefetch | |
| 2573 Node *prefetch; | |
| 2574 if (is_store) { | |
| 2575 prefetch = new (C, 3) PrefetchWriteNode(i_o(), adr); | |
| 2576 } else { | |
| 2577 prefetch = new (C, 3) PrefetchReadNode(i_o(), adr); | |
| 2578 } | |
| 2579 prefetch->init_req(0, control()); | |
| 2580 set_i_o(_gvn.transform(prefetch)); | |
| 2581 | |
| 2582 return true; | |
| 2583 } | |
| 2584 | |
| 2585 //----------------------------inline_unsafe_CAS---------------------------- | |
| 2586 | |
| 2587 bool LibraryCallKit::inline_unsafe_CAS(BasicType type) { | |
| 2588 // This basic scheme here is the same as inline_unsafe_access, but | |
| 2589 // differs in enough details that combining them would make the code | |
| 2590 // overly confusing. (This is a true fact! I originally combined | |
| 2591 // them, but even I was confused by it!) As much code/comments as | |
| 2592 // possible are retained from inline_unsafe_access though to make | |
| 605 | 2593 // the correspondences clearer. - dl |
| 0 | 2594 |
| 2595 if (callee()->is_static()) return false; // caller must have the capability! | |
| 2596 | |
| 2597 #ifndef PRODUCT | |
| 2598 { | |
| 2599 ResourceMark rm; | |
| 2600 // Check the signatures. | |
| 2601 ciSignature* sig = signature(); | |
| 2602 #ifdef ASSERT | |
| 2603 BasicType rtype = sig->return_type()->basic_type(); | |
| 2604 assert(rtype == T_BOOLEAN, "CAS must return boolean"); | |
| 2605 assert(sig->count() == 4, "CAS has 4 arguments"); | |
| 2606 assert(sig->type_at(0)->basic_type() == T_OBJECT, "CAS base is object"); | |
| 2607 assert(sig->type_at(1)->basic_type() == T_LONG, "CAS offset is long"); | |
| 2608 #endif // ASSERT | |
| 2609 } | |
| 2610 #endif //PRODUCT | |
| 2611 | |
| 2612 // number of stack slots per value argument (1 or 2) | |
| 2613 int type_words = type2size[type]; | |
| 2614 | |
| 2615 // Cannot inline wide CAS on machines that don't support it natively | |
|
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diff
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|
2616 if (type2aelembytes(type) > BytesPerInt && !VM_Version::supports_cx8()) |
| 0 | 2617 return false; |
| 2618 | |
| 2619 C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe". | |
| 2620 | |
| 2621 // Argument words: "this" plus oop plus offset plus oldvalue plus newvalue; | |
| 2622 int nargs = 1 + 1 + 2 + type_words + type_words; | |
| 2623 | |
| 2624 // pop arguments: newval, oldval, offset, base, and receiver | |
| 2625 debug_only(int saved_sp = _sp); | |
| 2626 _sp += nargs; | |
| 2627 Node* newval = (type_words == 1) ? pop() : pop_pair(); | |
| 2628 Node* oldval = (type_words == 1) ? pop() : pop_pair(); | |
| 2629 Node *offset = pop_pair(); | |
| 2630 Node *base = pop(); | |
| 2631 Node *receiver = pop(); | |
| 2632 assert(saved_sp == _sp, "must have correct argument count"); | |
| 2633 | |
| 2634 // Null check receiver. | |
| 2635 _sp += nargs; | |
| 2636 do_null_check(receiver, T_OBJECT); | |
| 2637 _sp -= nargs; | |
| 2638 if (stopped()) { | |
| 2639 return true; | |
| 2640 } | |
| 2641 | |
| 2642 // Build field offset expression. | |
| 2643 // We currently rely on the cookies produced by Unsafe.xxxFieldOffset | |
| 2644 // to be plain byte offsets, which are also the same as those accepted | |
| 2645 // by oopDesc::field_base. | |
| 2646 assert(Unsafe_field_offset_to_byte_offset(11) == 11, "fieldOffset must be byte-scaled"); | |
| 2647 // 32-bit machines ignore the high half of long offsets | |
| 2648 offset = ConvL2X(offset); | |
| 2649 Node* adr = make_unsafe_address(base, offset); | |
| 2650 const TypePtr *adr_type = _gvn.type(adr)->isa_ptr(); | |
| 2651 | |
| 2652 // (Unlike inline_unsafe_access, there seems no point in trying | |
| 2653 // to refine types. Just use the coarse types here. | |
| 2654 const Type *value_type = Type::get_const_basic_type(type); | |
| 2655 Compile::AliasType* alias_type = C->alias_type(adr_type); | |
| 2656 assert(alias_type->index() != Compile::AliasIdxBot, "no bare pointers here"); | |
| 2657 int alias_idx = C->get_alias_index(adr_type); | |
| 2658 | |
| 2659 // Memory-model-wise, a CAS acts like a little synchronized block, | |
| 605 | 2660 // so needs barriers on each side. These don't translate into |
| 0 | 2661 // actual barriers on most machines, but we still need rest of |
| 2662 // compiler to respect ordering. | |
| 2663 | |
| 2664 insert_mem_bar(Op_MemBarRelease); | |
| 2665 insert_mem_bar(Op_MemBarCPUOrder); | |
| 2666 | |
| 2667 // 4984716: MemBars must be inserted before this | |
| 2668 // memory node in order to avoid a false | |
| 2669 // dependency which will confuse the scheduler. | |
| 2670 Node *mem = memory(alias_idx); | |
| 2671 | |
| 2672 // For now, we handle only those cases that actually exist: ints, | |
| 2673 // longs, and Object. Adding others should be straightforward. | |
| 2674 Node* cas; | |
| 2675 switch(type) { | |
| 2676 case T_INT: | |
| 2677 cas = _gvn.transform(new (C, 5) CompareAndSwapINode(control(), mem, adr, newval, oldval)); | |
| 2678 break; | |
| 2679 case T_LONG: | |
| 2680 cas = _gvn.transform(new (C, 5) CompareAndSwapLNode(control(), mem, adr, newval, oldval)); | |
| 2681 break; | |
| 2682 case T_OBJECT: | |
|
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2683 // reference stores need a store barrier. |
| 0 | 2684 // (They don't if CAS fails, but it isn't worth checking.) |
|
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2685 pre_barrier(true /* do_load*/, |
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2686 control(), base, adr, alias_idx, newval, value_type->make_oopptr(), |
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2687 NULL /* pre_val*/, |
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2688 T_OBJECT); |
|
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2689 #ifdef _LP64 |
| 163 | 2690 if (adr->bottom_type()->is_ptr_to_narrowoop()) { |
|
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2691 Node *newval_enc = _gvn.transform(new (C, 2) EncodePNode(newval, newval->bottom_type()->make_narrowoop())); |
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2692 Node *oldval_enc = _gvn.transform(new (C, 2) EncodePNode(oldval, oldval->bottom_type()->make_narrowoop())); |
|
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2693 cas = _gvn.transform(new (C, 5) CompareAndSwapNNode(control(), mem, adr, |
|
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2694 newval_enc, oldval_enc)); |
|
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2695 } else |
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2696 #endif |
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2697 { |
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2698 cas = _gvn.transform(new (C, 5) CompareAndSwapPNode(control(), mem, adr, newval, oldval)); |
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2699 } |
| 0 | 2700 post_barrier(control(), cas, base, adr, alias_idx, newval, T_OBJECT, true); |
| 2701 break; | |
| 2702 default: | |
| 2703 ShouldNotReachHere(); | |
| 2704 break; | |
| 2705 } | |
| 2706 | |
| 2707 // SCMemProjNodes represent the memory state of CAS. Their main | |
| 2708 // role is to prevent CAS nodes from being optimized away when their | |
| 2709 // results aren't used. | |
| 2710 Node* proj = _gvn.transform( new (C, 1) SCMemProjNode(cas)); | |
| 2711 set_memory(proj, alias_idx); | |
| 2712 | |
| 2713 // Add the trailing membar surrounding the access | |
| 2714 insert_mem_bar(Op_MemBarCPUOrder); | |
| 2715 insert_mem_bar(Op_MemBarAcquire); | |
| 2716 | |
| 2717 push(cas); | |
| 2718 return true; | |
| 2719 } | |
| 2720 | |
| 2721 bool LibraryCallKit::inline_unsafe_ordered_store(BasicType type) { | |
| 2722 // This is another variant of inline_unsafe_access, differing in | |
| 2723 // that it always issues store-store ("release") barrier and ensures | |
| 2724 // store-atomicity (which only matters for "long"). | |
| 2725 | |
| 2726 if (callee()->is_static()) return false; // caller must have the capability! | |
| 2727 | |
| 2728 #ifndef PRODUCT | |
| 2729 { | |
| 2730 ResourceMark rm; | |
| 2731 // Check the signatures. | |
| 2732 ciSignature* sig = signature(); | |
| 2733 #ifdef ASSERT | |
| 2734 BasicType rtype = sig->return_type()->basic_type(); | |
| 2735 assert(rtype == T_VOID, "must return void"); | |
| 2736 assert(sig->count() == 3, "has 3 arguments"); | |
| 2737 assert(sig->type_at(0)->basic_type() == T_OBJECT, "base is object"); | |
| 2738 assert(sig->type_at(1)->basic_type() == T_LONG, "offset is long"); | |
| 2739 #endif // ASSERT | |
| 2740 } | |
| 2741 #endif //PRODUCT | |
| 2742 | |
| 2743 // number of stack slots per value argument (1 or 2) | |
| 2744 int type_words = type2size[type]; | |
| 2745 | |
| 2746 C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe". | |
| 2747 | |
| 2748 // Argument words: "this" plus oop plus offset plus value; | |
| 2749 int nargs = 1 + 1 + 2 + type_words; | |
| 2750 | |
| 2751 // pop arguments: val, offset, base, and receiver | |
| 2752 debug_only(int saved_sp = _sp); | |
| 2753 _sp += nargs; | |
| 2754 Node* val = (type_words == 1) ? pop() : pop_pair(); | |
| 2755 Node *offset = pop_pair(); | |
| 2756 Node *base = pop(); | |
| 2757 Node *receiver = pop(); | |
| 2758 assert(saved_sp == _sp, "must have correct argument count"); | |
| 2759 | |
| 2760 // Null check receiver. | |
| 2761 _sp += nargs; | |
| 2762 do_null_check(receiver, T_OBJECT); | |
| 2763 _sp -= nargs; | |
| 2764 if (stopped()) { | |
| 2765 return true; | |
| 2766 } | |
| 2767 | |
| 2768 // Build field offset expression. | |
| 2769 assert(Unsafe_field_offset_to_byte_offset(11) == 11, "fieldOffset must be byte-scaled"); | |
| 2770 // 32-bit machines ignore the high half of long offsets | |
| 2771 offset = ConvL2X(offset); | |
| 2772 Node* adr = make_unsafe_address(base, offset); | |
| 2773 const TypePtr *adr_type = _gvn.type(adr)->isa_ptr(); | |
| 2774 const Type *value_type = Type::get_const_basic_type(type); | |
| 2775 Compile::AliasType* alias_type = C->alias_type(adr_type); | |
| 2776 | |
| 2777 insert_mem_bar(Op_MemBarRelease); | |
| 2778 insert_mem_bar(Op_MemBarCPUOrder); | |
| 2779 // Ensure that the store is atomic for longs: | |
| 2780 bool require_atomic_access = true; | |
| 2781 Node* store; | |
| 2782 if (type == T_OBJECT) // reference stores need a store barrier. | |
| 825 | 2783 store = store_oop_to_unknown(control(), base, adr, adr_type, val, type); |
| 0 | 2784 else { |
| 2785 store = store_to_memory(control(), adr, val, type, adr_type, require_atomic_access); | |
| 2786 } | |
| 2787 insert_mem_bar(Op_MemBarCPUOrder); | |
| 2788 return true; | |
| 2789 } | |
| 2790 | |
| 2791 bool LibraryCallKit::inline_unsafe_allocate() { | |
| 2792 if (callee()->is_static()) return false; // caller must have the capability! | |
| 2793 int nargs = 1 + 1; | |
| 2794 assert(signature()->size() == nargs-1, "alloc has 1 argument"); | |
| 2795 null_check_receiver(callee()); // check then ignore argument(0) | |
| 2796 _sp += nargs; // set original stack for use by uncommon_trap | |
| 2797 Node* cls = do_null_check(argument(1), T_OBJECT); | |
| 2798 _sp -= nargs; | |
| 2799 if (stopped()) return true; | |
| 2800 | |
| 2801 Node* kls = load_klass_from_mirror(cls, false, nargs, NULL, 0); | |
| 2802 _sp += nargs; // set original stack for use by uncommon_trap | |
| 2803 kls = do_null_check(kls, T_OBJECT); | |
| 2804 _sp -= nargs; | |
| 2805 if (stopped()) return true; // argument was like int.class | |
| 2806 | |
| 2807 // Note: The argument might still be an illegal value like | |
| 2808 // Serializable.class or Object[].class. The runtime will handle it. | |
| 2809 // But we must make an explicit check for initialization. | |
| 2810 Node* insp = basic_plus_adr(kls, instanceKlass::init_state_offset_in_bytes() + sizeof(oopDesc)); | |
| 2811 Node* inst = make_load(NULL, insp, TypeInt::INT, T_INT); | |
| 2812 Node* bits = intcon(instanceKlass::fully_initialized); | |
| 2813 Node* test = _gvn.transform( new (C, 3) SubINode(inst, bits) ); | |
| 2814 // The 'test' is non-zero if we need to take a slow path. | |
| 2815 | |
| 2816 Node* obj = new_instance(kls, test); | |
| 2817 push(obj); | |
| 2818 | |
| 2819 return true; | |
| 2820 } | |
| 2821 | |
| 2822 //------------------------inline_native_time_funcs-------------- | |
| 2823 // inline code for System.currentTimeMillis() and System.nanoTime() | |
| 2824 // these have the same type and signature | |
| 2825 bool LibraryCallKit::inline_native_time_funcs(bool isNano) { | |
| 2826 address funcAddr = isNano ? CAST_FROM_FN_PTR(address, os::javaTimeNanos) : | |
| 2827 CAST_FROM_FN_PTR(address, os::javaTimeMillis); | |
| 2828 const char * funcName = isNano ? "nanoTime" : "currentTimeMillis"; | |
| 2829 const TypeFunc *tf = OptoRuntime::current_time_millis_Type(); | |
| 2830 const TypePtr* no_memory_effects = NULL; | |
| 2831 Node* time = make_runtime_call(RC_LEAF, tf, funcAddr, funcName, no_memory_effects); | |
| 2832 Node* value = _gvn.transform(new (C, 1) ProjNode(time, TypeFunc::Parms+0)); | |
| 2833 #ifdef ASSERT | |
| 2834 Node* value_top = _gvn.transform(new (C, 1) ProjNode(time, TypeFunc::Parms + 1)); | |
| 2835 assert(value_top == top(), "second value must be top"); | |
| 2836 #endif | |
| 2837 push_pair(value); | |
| 2838 return true; | |
| 2839 } | |
| 2840 | |
| 2841 //------------------------inline_native_currentThread------------------ | |
| 2842 bool LibraryCallKit::inline_native_currentThread() { | |
| 2843 Node* junk = NULL; | |
| 2844 push(generate_current_thread(junk)); | |
| 2845 return true; | |
| 2846 } | |
| 2847 | |
| 2848 //------------------------inline_native_isInterrupted------------------ | |
| 2849 bool LibraryCallKit::inline_native_isInterrupted() { | |
| 2850 const int nargs = 1+1; // receiver + boolean | |
| 2851 assert(nargs == arg_size(), "sanity"); | |
| 2852 // Add a fast path to t.isInterrupted(clear_int): | |
| 2853 // (t == Thread.current() && (!TLS._osthread._interrupted || !clear_int)) | |
| 2854 // ? TLS._osthread._interrupted : /*slow path:*/ t.isInterrupted(clear_int) | |
| 2855 // So, in the common case that the interrupt bit is false, | |
| 2856 // we avoid making a call into the VM. Even if the interrupt bit | |
| 2857 // is true, if the clear_int argument is false, we avoid the VM call. | |
| 2858 // However, if the receiver is not currentThread, we must call the VM, | |
| 2859 // because there must be some locking done around the operation. | |
| 2860 | |
| 2861 // We only go to the fast case code if we pass two guards. | |
| 2862 // Paths which do not pass are accumulated in the slow_region. | |
| 2863 RegionNode* slow_region = new (C, 1) RegionNode(1); | |
| 2864 record_for_igvn(slow_region); | |
| 2865 RegionNode* result_rgn = new (C, 4) RegionNode(1+3); // fast1, fast2, slow | |
| 2866 PhiNode* result_val = new (C, 4) PhiNode(result_rgn, TypeInt::BOOL); | |
| 2867 enum { no_int_result_path = 1, | |
| 2868 no_clear_result_path = 2, | |
| 2869 slow_result_path = 3 | |
| 2870 }; | |
| 2871 | |
| 2872 // (a) Receiving thread must be the current thread. | |
| 2873 Node* rec_thr = argument(0); | |
| 2874 Node* tls_ptr = NULL; | |
| 2875 Node* cur_thr = generate_current_thread(tls_ptr); | |
| 2876 Node* cmp_thr = _gvn.transform( new (C, 3) CmpPNode(cur_thr, rec_thr) ); | |
| 2877 Node* bol_thr = _gvn.transform( new (C, 2) BoolNode(cmp_thr, BoolTest::ne) ); | |
| 2878 | |
| 2879 bool known_current_thread = (_gvn.type(bol_thr) == TypeInt::ZERO); | |
| 2880 if (!known_current_thread) | |
| 2881 generate_slow_guard(bol_thr, slow_region); | |
| 2882 | |
| 2883 // (b) Interrupt bit on TLS must be false. | |
| 2884 Node* p = basic_plus_adr(top()/*!oop*/, tls_ptr, in_bytes(JavaThread::osthread_offset())); | |
| 2885 Node* osthread = make_load(NULL, p, TypeRawPtr::NOTNULL, T_ADDRESS); | |
| 2886 p = basic_plus_adr(top()/*!oop*/, osthread, in_bytes(OSThread::interrupted_offset())); | |
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2887 // Set the control input on the field _interrupted read to prevent it floating up. |
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2888 Node* int_bit = make_load(control(), p, TypeInt::BOOL, T_INT); |
| 0 | 2889 Node* cmp_bit = _gvn.transform( new (C, 3) CmpINode(int_bit, intcon(0)) ); |
| 2890 Node* bol_bit = _gvn.transform( new (C, 2) BoolNode(cmp_bit, BoolTest::ne) ); | |
| 2891 | |
| 2892 IfNode* iff_bit = create_and_map_if(control(), bol_bit, PROB_UNLIKELY_MAG(3), COUNT_UNKNOWN); | |
| 2893 | |
| 2894 // First fast path: if (!TLS._interrupted) return false; | |
| 2895 Node* false_bit = _gvn.transform( new (C, 1) IfFalseNode(iff_bit) ); | |
| 2896 result_rgn->init_req(no_int_result_path, false_bit); | |
| 2897 result_val->init_req(no_int_result_path, intcon(0)); | |
| 2898 | |
| 2899 // drop through to next case | |
| 2900 set_control( _gvn.transform(new (C, 1) IfTrueNode(iff_bit)) ); | |
| 2901 | |
| 2902 // (c) Or, if interrupt bit is set and clear_int is false, use 2nd fast path. | |
| 2903 Node* clr_arg = argument(1); | |
| 2904 Node* cmp_arg = _gvn.transform( new (C, 3) CmpINode(clr_arg, intcon(0)) ); | |
| 2905 Node* bol_arg = _gvn.transform( new (C, 2) BoolNode(cmp_arg, BoolTest::ne) ); | |
| 2906 IfNode* iff_arg = create_and_map_if(control(), bol_arg, PROB_FAIR, COUNT_UNKNOWN); | |
| 2907 | |
| 2908 // Second fast path: ... else if (!clear_int) return true; | |
| 2909 Node* false_arg = _gvn.transform( new (C, 1) IfFalseNode(iff_arg) ); | |
| 2910 result_rgn->init_req(no_clear_result_path, false_arg); | |
| 2911 result_val->init_req(no_clear_result_path, intcon(1)); | |
| 2912 | |
| 2913 // drop through to next case | |
| 2914 set_control( _gvn.transform(new (C, 1) IfTrueNode(iff_arg)) ); | |
| 2915 | |
| 2916 // (d) Otherwise, go to the slow path. | |
| 2917 slow_region->add_req(control()); | |
| 2918 set_control( _gvn.transform(slow_region) ); | |
| 2919 | |
| 2920 if (stopped()) { | |
| 2921 // There is no slow path. | |
| 2922 result_rgn->init_req(slow_result_path, top()); | |
| 2923 result_val->init_req(slow_result_path, top()); | |
| 2924 } else { | |
| 2925 // non-virtual because it is a private non-static | |
| 2926 CallJavaNode* slow_call = generate_method_call(vmIntrinsics::_isInterrupted); | |
| 2927 | |
| 2928 Node* slow_val = set_results_for_java_call(slow_call); | |
| 2929 // this->control() comes from set_results_for_java_call | |
| 2930 | |
| 2931 // If we know that the result of the slow call will be true, tell the optimizer! | |
| 2932 if (known_current_thread) slow_val = intcon(1); | |
| 2933 | |
| 2934 Node* fast_io = slow_call->in(TypeFunc::I_O); | |
| 2935 Node* fast_mem = slow_call->in(TypeFunc::Memory); | |
| 2936 // These two phis are pre-filled with copies of of the fast IO and Memory | |
| 2937 Node* io_phi = PhiNode::make(result_rgn, fast_io, Type::ABIO); | |
| 2938 Node* mem_phi = PhiNode::make(result_rgn, fast_mem, Type::MEMORY, TypePtr::BOTTOM); | |
| 2939 | |
| 2940 result_rgn->init_req(slow_result_path, control()); | |
| 2941 io_phi ->init_req(slow_result_path, i_o()); | |
| 2942 mem_phi ->init_req(slow_result_path, reset_memory()); | |
| 2943 result_val->init_req(slow_result_path, slow_val); | |
| 2944 | |
| 2945 set_all_memory( _gvn.transform(mem_phi) ); | |
| 2946 set_i_o( _gvn.transform(io_phi) ); | |
| 2947 } | |
| 2948 | |
| 2949 push_result(result_rgn, result_val); | |
| 2950 C->set_has_split_ifs(true); // Has chance for split-if optimization | |
| 2951 | |
| 2952 return true; | |
| 2953 } | |
| 2954 | |
| 2955 //---------------------------load_mirror_from_klass---------------------------- | |
| 2956 // Given a klass oop, load its java mirror (a java.lang.Class oop). | |
| 2957 Node* LibraryCallKit::load_mirror_from_klass(Node* klass) { | |
| 2958 Node* p = basic_plus_adr(klass, Klass::java_mirror_offset_in_bytes() + sizeof(oopDesc)); | |
| 2959 return make_load(NULL, p, TypeInstPtr::MIRROR, T_OBJECT); | |
| 2960 } | |
| 2961 | |
| 2962 //-----------------------load_klass_from_mirror_common------------------------- | |
| 2963 // Given a java mirror (a java.lang.Class oop), load its corresponding klass oop. | |
| 2964 // Test the klass oop for null (signifying a primitive Class like Integer.TYPE), | |
| 2965 // and branch to the given path on the region. | |
| 2966 // If never_see_null, take an uncommon trap on null, so we can optimistically | |
| 2967 // compile for the non-null case. | |
| 2968 // If the region is NULL, force never_see_null = true. | |
| 2969 Node* LibraryCallKit::load_klass_from_mirror_common(Node* mirror, | |
| 2970 bool never_see_null, | |
| 2971 int nargs, | |
| 2972 RegionNode* region, | |
| 2973 int null_path, | |
| 2974 int offset) { | |
| 2975 if (region == NULL) never_see_null = true; | |
| 2976 Node* p = basic_plus_adr(mirror, offset); | |
| 2977 const TypeKlassPtr* kls_type = TypeKlassPtr::OBJECT_OR_NULL; | |
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2978 Node* kls = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeRawPtr::BOTTOM, kls_type) ); |
| 0 | 2979 _sp += nargs; // any deopt will start just before call to enclosing method |
| 2980 Node* null_ctl = top(); | |
| 2981 kls = null_check_oop(kls, &null_ctl, never_see_null); | |
| 2982 if (region != NULL) { | |
| 2983 // Set region->in(null_path) if the mirror is a primitive (e.g, int.class). | |
| 2984 region->init_req(null_path, null_ctl); | |
| 2985 } else { | |
| 2986 assert(null_ctl == top(), "no loose ends"); | |
| 2987 } | |
| 2988 _sp -= nargs; | |
| 2989 return kls; | |
| 2990 } | |
| 2991 | |
| 2992 //--------------------(inline_native_Class_query helpers)--------------------- | |
| 2993 // Use this for JVM_ACC_INTERFACE, JVM_ACC_IS_CLONEABLE, JVM_ACC_HAS_FINALIZER. | |
| 2994 // Fall through if (mods & mask) == bits, take the guard otherwise. | |
| 2995 Node* LibraryCallKit::generate_access_flags_guard(Node* kls, int modifier_mask, int modifier_bits, RegionNode* region) { | |
| 2996 // Branch around if the given klass has the given modifier bit set. | |
| 2997 // Like generate_guard, adds a new path onto the region. | |
| 2998 Node* modp = basic_plus_adr(kls, Klass::access_flags_offset_in_bytes() + sizeof(oopDesc)); | |
| 2999 Node* mods = make_load(NULL, modp, TypeInt::INT, T_INT); | |
| 3000 Node* mask = intcon(modifier_mask); | |
| 3001 Node* bits = intcon(modifier_bits); | |
| 3002 Node* mbit = _gvn.transform( new (C, 3) AndINode(mods, mask) ); | |
| 3003 Node* cmp = _gvn.transform( new (C, 3) CmpINode(mbit, bits) ); | |
| 3004 Node* bol = _gvn.transform( new (C, 2) BoolNode(cmp, BoolTest::ne) ); | |
| 3005 return generate_fair_guard(bol, region); | |
| 3006 } | |
| 3007 Node* LibraryCallKit::generate_interface_guard(Node* kls, RegionNode* region) { | |
| 3008 return generate_access_flags_guard(kls, JVM_ACC_INTERFACE, 0, region); | |
| 3009 } | |
| 3010 | |
| 3011 //-------------------------inline_native_Class_query------------------- | |
| 3012 bool LibraryCallKit::inline_native_Class_query(vmIntrinsics::ID id) { | |
| 3013 int nargs = 1+0; // just the Class mirror, in most cases | |
| 3014 const Type* return_type = TypeInt::BOOL; | |
| 3015 Node* prim_return_value = top(); // what happens if it's a primitive class? | |
| 3016 bool never_see_null = !too_many_traps(Deoptimization::Reason_null_check); | |
| 3017 bool expect_prim = false; // most of these guys expect to work on refs | |
| 3018 | |
| 3019 enum { _normal_path = 1, _prim_path = 2, PATH_LIMIT }; | |
| 3020 | |
| 3021 switch (id) { | |
| 3022 case vmIntrinsics::_isInstance: | |
| 3023 nargs = 1+1; // the Class mirror, plus the object getting queried about | |
| 3024 // nothing is an instance of a primitive type | |
| 3025 prim_return_value = intcon(0); | |
| 3026 break; | |
| 3027 case vmIntrinsics::_getModifiers: | |
| 3028 prim_return_value = intcon(JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC); | |
| 3029 assert(is_power_of_2((int)JVM_ACC_WRITTEN_FLAGS+1), "change next line"); | |
| 3030 return_type = TypeInt::make(0, JVM_ACC_WRITTEN_FLAGS, Type::WidenMin); | |
| 3031 break; | |
| 3032 case vmIntrinsics::_isInterface: | |
| 3033 prim_return_value = intcon(0); | |
| 3034 break; | |
| 3035 case vmIntrinsics::_isArray: | |
| 3036 prim_return_value = intcon(0); | |
| 3037 expect_prim = true; // cf. ObjectStreamClass.getClassSignature | |
| 3038 break; | |
| 3039 case vmIntrinsics::_isPrimitive: | |
| 3040 prim_return_value = intcon(1); | |
| 3041 expect_prim = true; // obviously | |
| 3042 break; | |
| 3043 case vmIntrinsics::_getSuperclass: | |
| 3044 prim_return_value = null(); | |
| 3045 return_type = TypeInstPtr::MIRROR->cast_to_ptr_type(TypePtr::BotPTR); | |
| 3046 break; | |
| 3047 case vmIntrinsics::_getComponentType: | |
| 3048 prim_return_value = null(); | |
| 3049 return_type = TypeInstPtr::MIRROR->cast_to_ptr_type(TypePtr::BotPTR); | |
| 3050 break; | |
| 3051 case vmIntrinsics::_getClassAccessFlags: | |
| 3052 prim_return_value = intcon(JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC); | |
| 3053 return_type = TypeInt::INT; // not bool! 6297094 | |
| 3054 break; | |
| 3055 default: | |
| 3056 ShouldNotReachHere(); | |
| 3057 } | |
| 3058 | |
| 3059 Node* mirror = argument(0); | |
| 3060 Node* obj = (nargs <= 1)? top(): argument(1); | |
| 3061 | |
| 3062 const TypeInstPtr* mirror_con = _gvn.type(mirror)->isa_instptr(); | |
| 3063 if (mirror_con == NULL) return false; // cannot happen? | |
| 3064 | |
| 3065 #ifndef PRODUCT | |
| 3066 if (PrintIntrinsics || PrintInlining || PrintOptoInlining) { | |
| 3067 ciType* k = mirror_con->java_mirror_type(); | |
| 3068 if (k) { | |
| 3069 tty->print("Inlining %s on constant Class ", vmIntrinsics::name_at(intrinsic_id())); | |
| 3070 k->print_name(); | |
| 3071 tty->cr(); | |
| 3072 } | |
| 3073 } | |
| 3074 #endif | |
| 3075 | |
| 3076 // Null-check the mirror, and the mirror's klass ptr (in case it is a primitive). | |
| 3077 RegionNode* region = new (C, PATH_LIMIT) RegionNode(PATH_LIMIT); | |
| 3078 record_for_igvn(region); | |
| 3079 PhiNode* phi = new (C, PATH_LIMIT) PhiNode(region, return_type); | |
| 3080 | |
| 3081 // The mirror will never be null of Reflection.getClassAccessFlags, however | |
| 3082 // it may be null for Class.isInstance or Class.getModifiers. Throw a NPE | |
| 3083 // if it is. See bug 4774291. | |
| 3084 | |
| 3085 // For Reflection.getClassAccessFlags(), the null check occurs in | |
| 3086 // the wrong place; see inline_unsafe_access(), above, for a similar | |
| 3087 // situation. | |
| 3088 _sp += nargs; // set original stack for use by uncommon_trap | |
| 3089 mirror = do_null_check(mirror, T_OBJECT); | |
| 3090 _sp -= nargs; | |
| 3091 // If mirror or obj is dead, only null-path is taken. | |
| 3092 if (stopped()) return true; | |
| 3093 | |
| 3094 if (expect_prim) never_see_null = false; // expect nulls (meaning prims) | |
| 3095 | |
| 3096 // Now load the mirror's klass metaobject, and null-check it. | |
| 3097 // Side-effects region with the control path if the klass is null. | |
| 3098 Node* kls = load_klass_from_mirror(mirror, never_see_null, nargs, | |
| 3099 region, _prim_path); | |
| 3100 // If kls is null, we have a primitive mirror. | |
| 3101 phi->init_req(_prim_path, prim_return_value); | |
| 3102 if (stopped()) { push_result(region, phi); return true; } | |
| 3103 | |
| 3104 Node* p; // handy temp | |
| 3105 Node* null_ctl; | |
| 3106 | |
| 3107 // Now that we have the non-null klass, we can perform the real query. | |
| 3108 // For constant classes, the query will constant-fold in LoadNode::Value. | |
| 3109 Node* query_value = top(); | |
| 3110 switch (id) { | |
| 3111 case vmIntrinsics::_isInstance: | |
| 3112 // nothing is an instance of a primitive type | |
|
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3113 _sp += nargs; // gen_instanceof might do an uncommon trap |
| 0 | 3114 query_value = gen_instanceof(obj, kls); |
|
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3115 _sp -= nargs; |
| 0 | 3116 break; |
| 3117 | |
| 3118 case vmIntrinsics::_getModifiers: | |
| 3119 p = basic_plus_adr(kls, Klass::modifier_flags_offset_in_bytes() + sizeof(oopDesc)); | |
| 3120 query_value = make_load(NULL, p, TypeInt::INT, T_INT); | |
| 3121 break; | |
| 3122 | |
| 3123 case vmIntrinsics::_isInterface: | |
| 3124 // (To verify this code sequence, check the asserts in JVM_IsInterface.) | |
| 3125 if (generate_interface_guard(kls, region) != NULL) | |
| 3126 // A guard was added. If the guard is taken, it was an interface. | |
| 3127 phi->add_req(intcon(1)); | |
| 3128 // If we fall through, it's a plain class. | |
| 3129 query_value = intcon(0); | |
| 3130 break; | |
| 3131 | |
| 3132 case vmIntrinsics::_isArray: | |
| 3133 // (To verify this code sequence, check the asserts in JVM_IsArrayClass.) | |
| 3134 if (generate_array_guard(kls, region) != NULL) | |
| 3135 // A guard was added. If the guard is taken, it was an array. | |
| 3136 phi->add_req(intcon(1)); | |
| 3137 // If we fall through, it's a plain class. | |
| 3138 query_value = intcon(0); | |
| 3139 break; | |
| 3140 | |
| 3141 case vmIntrinsics::_isPrimitive: | |
| 3142 query_value = intcon(0); // "normal" path produces false | |
| 3143 break; | |
| 3144 | |
| 3145 case vmIntrinsics::_getSuperclass: | |
| 3146 // The rules here are somewhat unfortunate, but we can still do better | |
| 3147 // with random logic than with a JNI call. | |
| 3148 // Interfaces store null or Object as _super, but must report null. | |
| 3149 // Arrays store an intermediate super as _super, but must report Object. | |
| 3150 // Other types can report the actual _super. | |
| 3151 // (To verify this code sequence, check the asserts in JVM_IsInterface.) | |
| 3152 if (generate_interface_guard(kls, region) != NULL) | |
| 3153 // A guard was added. If the guard is taken, it was an interface. | |
| 3154 phi->add_req(null()); | |
| 3155 if (generate_array_guard(kls, region) != NULL) | |
| 3156 // A guard was added. If the guard is taken, it was an array. | |
| 3157 phi->add_req(makecon(TypeInstPtr::make(env()->Object_klass()->java_mirror()))); | |
| 3158 // If we fall through, it's a plain class. Get its _super. | |
| 3159 p = basic_plus_adr(kls, Klass::super_offset_in_bytes() + sizeof(oopDesc)); | |
|
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|
3160 kls = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeRawPtr::BOTTOM, TypeKlassPtr::OBJECT_OR_NULL) ); |
| 0 | 3161 null_ctl = top(); |
| 3162 kls = null_check_oop(kls, &null_ctl); | |
| 3163 if (null_ctl != top()) { | |
| 3164 // If the guard is taken, Object.superClass is null (both klass and mirror). | |
| 3165 region->add_req(null_ctl); | |
| 3166 phi ->add_req(null()); | |
| 3167 } | |
| 3168 if (!stopped()) { | |
| 3169 query_value = load_mirror_from_klass(kls); | |
| 3170 } | |
| 3171 break; | |
| 3172 | |
| 3173 case vmIntrinsics::_getComponentType: | |
| 3174 if (generate_array_guard(kls, region) != NULL) { | |
| 3175 // Be sure to pin the oop load to the guard edge just created: | |
| 3176 Node* is_array_ctrl = region->in(region->req()-1); | |
| 3177 Node* cma = basic_plus_adr(kls, in_bytes(arrayKlass::component_mirror_offset()) + sizeof(oopDesc)); | |
| 3178 Node* cmo = make_load(is_array_ctrl, cma, TypeInstPtr::MIRROR, T_OBJECT); | |
| 3179 phi->add_req(cmo); | |
| 3180 } | |
| 3181 query_value = null(); // non-array case is null | |
| 3182 break; | |
| 3183 | |
| 3184 case vmIntrinsics::_getClassAccessFlags: | |
| 3185 p = basic_plus_adr(kls, Klass::access_flags_offset_in_bytes() + sizeof(oopDesc)); | |
| 3186 query_value = make_load(NULL, p, TypeInt::INT, T_INT); | |
| 3187 break; | |
| 3188 | |
| 3189 default: | |
| 3190 ShouldNotReachHere(); | |
| 3191 } | |
| 3192 | |
| 3193 // Fall-through is the normal case of a query to a real class. | |
| 3194 phi->init_req(1, query_value); | |
| 3195 region->init_req(1, control()); | |
| 3196 | |
| 3197 push_result(region, phi); | |
| 3198 C->set_has_split_ifs(true); // Has chance for split-if optimization | |
| 3199 | |
| 3200 return true; | |
| 3201 } | |
| 3202 | |
| 3203 //--------------------------inline_native_subtype_check------------------------ | |
| 3204 // This intrinsic takes the JNI calls out of the heart of | |
| 3205 // UnsafeFieldAccessorImpl.set, which improves Field.set, readObject, etc. | |
| 3206 bool LibraryCallKit::inline_native_subtype_check() { | |
| 3207 int nargs = 1+1; // the Class mirror, plus the other class getting examined | |
| 3208 | |
| 3209 // Pull both arguments off the stack. | |
| 3210 Node* args[2]; // two java.lang.Class mirrors: superc, subc | |
| 3211 args[0] = argument(0); | |
| 3212 args[1] = argument(1); | |
| 3213 Node* klasses[2]; // corresponding Klasses: superk, subk | |
| 3214 klasses[0] = klasses[1] = top(); | |
| 3215 | |
| 3216 enum { | |
| 3217 // A full decision tree on {superc is prim, subc is prim}: | |
| 3218 _prim_0_path = 1, // {P,N} => false | |
| 3219 // {P,P} & superc!=subc => false | |
| 3220 _prim_same_path, // {P,P} & superc==subc => true | |
| 3221 _prim_1_path, // {N,P} => false | |
| 3222 _ref_subtype_path, // {N,N} & subtype check wins => true | |
| 3223 _both_ref_path, // {N,N} & subtype check loses => false | |
| 3224 PATH_LIMIT | |
| 3225 }; | |
| 3226 | |
| 3227 RegionNode* region = new (C, PATH_LIMIT) RegionNode(PATH_LIMIT); | |
| 3228 Node* phi = new (C, PATH_LIMIT) PhiNode(region, TypeInt::BOOL); | |
| 3229 record_for_igvn(region); | |
| 3230 | |
| 3231 const TypePtr* adr_type = TypeRawPtr::BOTTOM; // memory type of loads | |
| 3232 const TypeKlassPtr* kls_type = TypeKlassPtr::OBJECT_OR_NULL; | |
| 3233 int class_klass_offset = java_lang_Class::klass_offset_in_bytes(); | |
| 3234 | |
| 3235 // First null-check both mirrors and load each mirror's klass metaobject. | |
| 3236 int which_arg; | |
| 3237 for (which_arg = 0; which_arg <= 1; which_arg++) { | |
| 3238 Node* arg = args[which_arg]; | |
| 3239 _sp += nargs; // set original stack for use by uncommon_trap | |
| 3240 arg = do_null_check(arg, T_OBJECT); | |
| 3241 _sp -= nargs; | |
| 3242 if (stopped()) break; | |
| 3243 args[which_arg] = _gvn.transform(arg); | |
| 3244 | |
| 3245 Node* p = basic_plus_adr(arg, class_klass_offset); | |
|
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|
3246 Node* kls = LoadKlassNode::make(_gvn, immutable_memory(), p, adr_type, kls_type); |
| 0 | 3247 klasses[which_arg] = _gvn.transform(kls); |
| 3248 } | |
| 3249 | |
| 3250 // Having loaded both klasses, test each for null. | |
| 3251 bool never_see_null = !too_many_traps(Deoptimization::Reason_null_check); | |
| 3252 for (which_arg = 0; which_arg <= 1; which_arg++) { | |
| 3253 Node* kls = klasses[which_arg]; | |
| 3254 Node* null_ctl = top(); | |
| 3255 _sp += nargs; // set original stack for use by uncommon_trap | |
| 3256 kls = null_check_oop(kls, &null_ctl, never_see_null); | |
| 3257 _sp -= nargs; | |
| 3258 int prim_path = (which_arg == 0 ? _prim_0_path : _prim_1_path); | |
| 3259 region->init_req(prim_path, null_ctl); | |
| 3260 if (stopped()) break; | |
| 3261 klasses[which_arg] = kls; | |
| 3262 } | |
| 3263 | |
| 3264 if (!stopped()) { | |
| 3265 // now we have two reference types, in klasses[0..1] | |
| 3266 Node* subk = klasses[1]; // the argument to isAssignableFrom | |
| 3267 Node* superk = klasses[0]; // the receiver | |
| 3268 region->set_req(_both_ref_path, gen_subtype_check(subk, superk)); | |
| 3269 // now we have a successful reference subtype check | |
| 3270 region->set_req(_ref_subtype_path, control()); | |
| 3271 } | |
| 3272 | |
| 3273 // If both operands are primitive (both klasses null), then | |
| 3274 // we must return true when they are identical primitives. | |
| 3275 // It is convenient to test this after the first null klass check. | |
| 3276 set_control(region->in(_prim_0_path)); // go back to first null check | |
| 3277 if (!stopped()) { | |
| 3278 // Since superc is primitive, make a guard for the superc==subc case. | |
| 3279 Node* cmp_eq = _gvn.transform( new (C, 3) CmpPNode(args[0], args[1]) ); | |
| 3280 Node* bol_eq = _gvn.transform( new (C, 2) BoolNode(cmp_eq, BoolTest::eq) ); | |
| 3281 generate_guard(bol_eq, region, PROB_FAIR); | |
| 3282 if (region->req() == PATH_LIMIT+1) { | |
| 3283 // A guard was added. If the added guard is taken, superc==subc. | |
| 3284 region->swap_edges(PATH_LIMIT, _prim_same_path); | |
| 3285 region->del_req(PATH_LIMIT); | |
| 3286 } | |
| 3287 region->set_req(_prim_0_path, control()); // Not equal after all. | |
| 3288 } | |
| 3289 | |
| 3290 // these are the only paths that produce 'true': | |
| 3291 phi->set_req(_prim_same_path, intcon(1)); | |
| 3292 phi->set_req(_ref_subtype_path, intcon(1)); | |
| 3293 | |
| 3294 // pull together the cases: | |
| 3295 assert(region->req() == PATH_LIMIT, "sane region"); | |
| 3296 for (uint i = 1; i < region->req(); i++) { | |
| 3297 Node* ctl = region->in(i); | |
| 3298 if (ctl == NULL || ctl == top()) { | |
| 3299 region->set_req(i, top()); | |
| 3300 phi ->set_req(i, top()); | |
| 3301 } else if (phi->in(i) == NULL) { | |
| 3302 phi->set_req(i, intcon(0)); // all other paths produce 'false' | |
| 3303 } | |
| 3304 } | |
| 3305 | |
| 3306 set_control(_gvn.transform(region)); | |
| 3307 push(_gvn.transform(phi)); | |
| 3308 | |
| 3309 return true; | |
| 3310 } | |
| 3311 | |
| 3312 //---------------------generate_array_guard_common------------------------ | |
| 3313 Node* LibraryCallKit::generate_array_guard_common(Node* kls, RegionNode* region, | |
| 3314 bool obj_array, bool not_array) { | |
| 3315 // If obj_array/non_array==false/false: | |
| 3316 // Branch around if the given klass is in fact an array (either obj or prim). | |
| 3317 // If obj_array/non_array==false/true: | |
| 3318 // Branch around if the given klass is not an array klass of any kind. | |
| 3319 // If obj_array/non_array==true/true: | |
| 3320 // Branch around if the kls is not an oop array (kls is int[], String, etc.) | |
| 3321 // If obj_array/non_array==true/false: | |
| 3322 // Branch around if the kls is an oop array (Object[] or subtype) | |
| 3323 // | |
| 3324 // Like generate_guard, adds a new path onto the region. | |
| 3325 jint layout_con = 0; | |
| 3326 Node* layout_val = get_layout_helper(kls, layout_con); | |
| 3327 if (layout_val == NULL) { | |
| 3328 bool query = (obj_array | |
| 3329 ? Klass::layout_helper_is_objArray(layout_con) | |
| 3330 : Klass::layout_helper_is_javaArray(layout_con)); | |
| 3331 if (query == not_array) { | |
| 3332 return NULL; // never a branch | |
| 3333 } else { // always a branch | |
| 3334 Node* always_branch = control(); | |
| 3335 if (region != NULL) | |
| 3336 region->add_req(always_branch); | |
| 3337 set_control(top()); | |
| 3338 return always_branch; | |
| 3339 } | |
| 3340 } | |
| 3341 // Now test the correct condition. | |
| 3342 jint nval = (obj_array | |
| 3343 ? ((jint)Klass::_lh_array_tag_type_value | |
| 3344 << Klass::_lh_array_tag_shift) | |
| 3345 : Klass::_lh_neutral_value); | |
| 3346 Node* cmp = _gvn.transform( new(C, 3) CmpINode(layout_val, intcon(nval)) ); | |
| 3347 BoolTest::mask btest = BoolTest::lt; // correct for testing is_[obj]array | |
| 3348 // invert the test if we are looking for a non-array | |
| 3349 if (not_array) btest = BoolTest(btest).negate(); | |
| 3350 Node* bol = _gvn.transform( new(C, 2) BoolNode(cmp, btest) ); | |
| 3351 return generate_fair_guard(bol, region); | |
| 3352 } | |
| 3353 | |
| 3354 | |
| 3355 //-----------------------inline_native_newArray-------------------------- | |
| 3356 bool LibraryCallKit::inline_native_newArray() { | |
| 3357 int nargs = 2; | |
| 3358 Node* mirror = argument(0); | |
| 3359 Node* count_val = argument(1); | |
| 3360 | |
| 3361 _sp += nargs; // set original stack for use by uncommon_trap | |
| 3362 mirror = do_null_check(mirror, T_OBJECT); | |
| 3363 _sp -= nargs; | |
| 163 | 3364 // If mirror or obj is dead, only null-path is taken. |
| 3365 if (stopped()) return true; | |
| 0 | 3366 |
| 3367 enum { _normal_path = 1, _slow_path = 2, PATH_LIMIT }; | |
| 3368 RegionNode* result_reg = new(C, PATH_LIMIT) RegionNode(PATH_LIMIT); | |
| 3369 PhiNode* result_val = new(C, PATH_LIMIT) PhiNode(result_reg, | |
| 3370 TypeInstPtr::NOTNULL); | |
| 3371 PhiNode* result_io = new(C, PATH_LIMIT) PhiNode(result_reg, Type::ABIO); | |
| 3372 PhiNode* result_mem = new(C, PATH_LIMIT) PhiNode(result_reg, Type::MEMORY, | |
| 3373 TypePtr::BOTTOM); | |
| 3374 | |
| 3375 bool never_see_null = !too_many_traps(Deoptimization::Reason_null_check); | |
| 3376 Node* klass_node = load_array_klass_from_mirror(mirror, never_see_null, | |
| 3377 nargs, | |
| 3378 result_reg, _slow_path); | |
| 3379 Node* normal_ctl = control(); | |
| 3380 Node* no_array_ctl = result_reg->in(_slow_path); | |
| 3381 | |
| 3382 // Generate code for the slow case. We make a call to newArray(). | |
| 3383 set_control(no_array_ctl); | |
| 3384 if (!stopped()) { | |
| 3385 // Either the input type is void.class, or else the | |
| 3386 // array klass has not yet been cached. Either the | |
| 3387 // ensuing call will throw an exception, or else it | |
| 3388 // will cache the array klass for next time. | |
| 3389 PreserveJVMState pjvms(this); | |
| 3390 CallJavaNode* slow_call = generate_method_call_static(vmIntrinsics::_newArray); | |
| 3391 Node* slow_result = set_results_for_java_call(slow_call); | |
| 3392 // this->control() comes from set_results_for_java_call | |
| 3393 result_reg->set_req(_slow_path, control()); | |
| 3394 result_val->set_req(_slow_path, slow_result); | |
| 3395 result_io ->set_req(_slow_path, i_o()); | |
| 3396 result_mem->set_req(_slow_path, reset_memory()); | |
| 3397 } | |
| 3398 | |
| 3399 set_control(normal_ctl); | |
| 3400 if (!stopped()) { | |
| 3401 // Normal case: The array type has been cached in the java.lang.Class. | |
| 3402 // The following call works fine even if the array type is polymorphic. | |
| 3403 // It could be a dynamic mix of int[], boolean[], Object[], etc. | |
|
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|
3404 Node* obj = new_array(klass_node, count_val, nargs); |
| 0 | 3405 result_reg->init_req(_normal_path, control()); |
| 3406 result_val->init_req(_normal_path, obj); | |
| 3407 result_io ->init_req(_normal_path, i_o()); | |
| 3408 result_mem->init_req(_normal_path, reset_memory()); | |
| 3409 } | |
| 3410 | |
| 3411 // Return the combined state. | |
| 3412 set_i_o( _gvn.transform(result_io) ); | |
| 3413 set_all_memory( _gvn.transform(result_mem) ); | |
| 3414 push_result(result_reg, result_val); | |
| 3415 C->set_has_split_ifs(true); // Has chance for split-if optimization | |
| 3416 | |
| 3417 return true; | |
| 3418 } | |
| 3419 | |
| 3420 //----------------------inline_native_getLength-------------------------- | |
| 3421 bool LibraryCallKit::inline_native_getLength() { | |
| 3422 if (too_many_traps(Deoptimization::Reason_intrinsic)) return false; | |
| 3423 | |
| 3424 int nargs = 1; | |
| 3425 Node* array = argument(0); | |
| 3426 | |
| 3427 _sp += nargs; // set original stack for use by uncommon_trap | |
| 3428 array = do_null_check(array, T_OBJECT); | |
| 3429 _sp -= nargs; | |
| 3430 | |
| 3431 // If array is dead, only null-path is taken. | |
| 3432 if (stopped()) return true; | |
| 3433 | |
| 3434 // Deoptimize if it is a non-array. | |
| 3435 Node* non_array = generate_non_array_guard(load_object_klass(array), NULL); | |
| 3436 | |
| 3437 if (non_array != NULL) { | |
| 3438 PreserveJVMState pjvms(this); | |
| 3439 set_control(non_array); | |
| 3440 _sp += nargs; // push the arguments back on the stack | |
| 3441 uncommon_trap(Deoptimization::Reason_intrinsic, | |
| 3442 Deoptimization::Action_maybe_recompile); | |
| 3443 } | |
| 3444 | |
| 3445 // If control is dead, only non-array-path is taken. | |
| 3446 if (stopped()) return true; | |
| 3447 | |
| 3448 // The works fine even if the array type is polymorphic. | |
| 3449 // It could be a dynamic mix of int[], boolean[], Object[], etc. | |
| 3450 push( load_array_length(array) ); | |
| 3451 | |
| 3452 C->set_has_split_ifs(true); // Has chance for split-if optimization | |
| 3453 | |
| 3454 return true; | |
| 3455 } | |
| 3456 | |
| 3457 //------------------------inline_array_copyOf---------------------------- | |
| 3458 bool LibraryCallKit::inline_array_copyOf(bool is_copyOfRange) { | |
| 3459 if (too_many_traps(Deoptimization::Reason_intrinsic)) return false; | |
| 3460 | |
| 3461 // Restore the stack and pop off the arguments. | |
| 3462 int nargs = 3 + (is_copyOfRange? 1: 0); | |
| 3463 Node* original = argument(0); | |
| 3464 Node* start = is_copyOfRange? argument(1): intcon(0); | |
| 3465 Node* end = is_copyOfRange? argument(2): argument(1); | |
| 3466 Node* array_type_mirror = is_copyOfRange? argument(3): argument(2); | |
| 3467 | |
|
902
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|
3468 Node* newcopy; |
|
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|
3469 |
|
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|
3470 //set the original stack and the reexecute bit for the interpreter to reexecute |
|
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|
3471 //the bytecode that invokes Arrays.copyOf if deoptimization happens |
|
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|
3472 { PreserveReexecuteState preexecs(this); |
|
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|
3473 _sp += nargs; |
|
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|
3474 jvms()->set_should_reexecute(true); |
|
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|
3475 |
|
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|
3476 array_type_mirror = do_null_check(array_type_mirror, T_OBJECT); |
|
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|
3477 original = do_null_check(original, T_OBJECT); |
|
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|
3478 |
|
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|
3479 // Check if a null path was taken unconditionally. |
|
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|
3480 if (stopped()) return true; |
|
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|
3481 |
|
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|
3482 Node* orig_length = load_array_length(original); |
|
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|
3483 |
|
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|
3484 Node* klass_node = load_klass_from_mirror(array_type_mirror, false, 0, |
|
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|
3485 NULL, 0); |
|
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|
3486 klass_node = do_null_check(klass_node, T_OBJECT); |
|
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|
3487 |
|
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|
3488 RegionNode* bailout = new (C, 1) RegionNode(1); |
|
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|
3489 record_for_igvn(bailout); |
|
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|
3490 |
|
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|
3491 // Despite the generic type of Arrays.copyOf, the mirror might be int, int[], etc. |
|
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|
3492 // Bail out if that is so. |
|
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|
3493 Node* not_objArray = generate_non_objArray_guard(klass_node, bailout); |
|
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|
3494 if (not_objArray != NULL) { |
|
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|
3495 // Improve the klass node's type from the new optimistic assumption: |
|
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|
3496 ciKlass* ak = ciArrayKlass::make(env()->Object_klass()); |
|
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|
3497 const Type* akls = TypeKlassPtr::make(TypePtr::NotNull, ak, 0/*offset*/); |
|
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|
3498 Node* cast = new (C, 2) CastPPNode(klass_node, akls); |
|
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|
3499 cast->init_req(0, control()); |
|
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|
3500 klass_node = _gvn.transform(cast); |
|
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|
3501 } |
|
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|
3502 |
|
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|
3503 // Bail out if either start or end is negative. |
|
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|
3504 generate_negative_guard(start, bailout, &start); |
|
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|
3505 generate_negative_guard(end, bailout, &end); |
|
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|
3506 |
|
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|
3507 Node* length = end; |
|
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|
3508 if (_gvn.type(start) != TypeInt::ZERO) { |
|
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|
3509 length = _gvn.transform( new (C, 3) SubINode(end, start) ); |
|
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|
3510 } |
|
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|
3511 |
|
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|
3512 // Bail out if length is negative. |
|
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|
3513 // ...Not needed, since the new_array will throw the right exception. |
|
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|
3514 //generate_negative_guard(length, bailout, &length); |
|
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|
3515 |
|
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|
3516 if (bailout->req() > 1) { |
|
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|
3517 PreserveJVMState pjvms(this); |
|
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|
3518 set_control( _gvn.transform(bailout) ); |
|
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|
3519 uncommon_trap(Deoptimization::Reason_intrinsic, |
|
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|
3520 Deoptimization::Action_maybe_recompile); |
|
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|
3521 } |
|
fc2281ddce3c
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|
3522 |
|
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changeset
|
3523 if (!stopped()) { |
|
900
9987d9d5eb0e
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|
3524 |
|
9987d9d5eb0e
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diff
changeset
|
3525 // How many elements will we copy from the original? |
|
9987d9d5eb0e
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cfang
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|
3526 // The answer is MinI(orig_length - start, length). |
|
9987d9d5eb0e
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changeset
|
3527 Node* orig_tail = _gvn.transform( new(C, 3) SubINode(orig_length, start) ); |
|
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changeset
|
3528 Node* moved = generate_min_max(vmIntrinsics::_min, orig_tail, length); |
|
9987d9d5eb0e
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diff
changeset
|
3529 |
|
9987d9d5eb0e
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diff
changeset
|
3530 const bool raw_mem_only = true; |
|
9987d9d5eb0e
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changeset
|
3531 newcopy = new_array(klass_node, length, 0, raw_mem_only); |
|
9987d9d5eb0e
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|
3532 |
|
9987d9d5eb0e
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diff
changeset
|
3533 // Generate a direct call to the right arraycopy function(s). |
|
9987d9d5eb0e
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cfang
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diff
changeset
|
3534 // We know the copy is disjoint but we might not know if the |
|
9987d9d5eb0e
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cfang
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diff
changeset
|
3535 // oop stores need checking. |
|
9987d9d5eb0e
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cfang
parents:
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diff
changeset
|
3536 // Extreme case: Arrays.copyOf((Integer[])x, 10, String[].class). |
|
9987d9d5eb0e
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diff
changeset
|
3537 // This will fail a store-check if x contains any non-nulls. |
|
9987d9d5eb0e
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diff
changeset
|
3538 bool disjoint_bases = true; |
|
9987d9d5eb0e
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diff
changeset
|
3539 bool length_never_negative = true; |
|
9987d9d5eb0e
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diff
changeset
|
3540 generate_arraycopy(TypeAryPtr::OOPS, T_OBJECT, |
|
9987d9d5eb0e
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diff
changeset
|
3541 original, start, newcopy, intcon(0), moved, |
|
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|
3542 disjoint_bases, length_never_negative); |
|
902
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|
3543 } |
|
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|
3544 } //original reexecute and sp are set back here |
|
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|
3545 |
|
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|
3546 if(!stopped()) { |
| 0 | 3547 push(newcopy); |
| 3548 } | |
| 3549 | |
| 3550 C->set_has_split_ifs(true); // Has chance for split-if optimization | |
| 3551 | |
| 3552 return true; | |
| 3553 } | |
| 3554 | |
| 3555 | |
| 3556 //----------------------generate_virtual_guard--------------------------- | |
| 3557 // Helper for hashCode and clone. Peeks inside the vtable to avoid a call. | |
| 3558 Node* LibraryCallKit::generate_virtual_guard(Node* obj_klass, | |
| 3559 RegionNode* slow_region) { | |
| 3560 ciMethod* method = callee(); | |
| 3561 int vtable_index = method->vtable_index(); | |
| 3562 // Get the methodOop out of the appropriate vtable entry. | |
| 3563 int entry_offset = (instanceKlass::vtable_start_offset() + | |
| 3564 vtable_index*vtableEntry::size()) * wordSize + | |
| 3565 vtableEntry::method_offset_in_bytes(); | |
| 3566 Node* entry_addr = basic_plus_adr(obj_klass, entry_offset); | |
| 3567 Node* target_call = make_load(NULL, entry_addr, TypeInstPtr::NOTNULL, T_OBJECT); | |
| 3568 | |
| 3569 // Compare the target method with the expected method (e.g., Object.hashCode). | |
| 3570 const TypeInstPtr* native_call_addr = TypeInstPtr::make(method); | |
| 3571 | |
| 3572 Node* native_call = makecon(native_call_addr); | |
| 3573 Node* chk_native = _gvn.transform( new(C, 3) CmpPNode(target_call, native_call) ); | |
| 3574 Node* test_native = _gvn.transform( new(C, 2) BoolNode(chk_native, BoolTest::ne) ); | |
| 3575 | |
| 3576 return generate_slow_guard(test_native, slow_region); | |
| 3577 } | |
| 3578 | |
| 3579 //-----------------------generate_method_call---------------------------- | |
| 3580 // Use generate_method_call to make a slow-call to the real | |
| 3581 // method if the fast path fails. An alternative would be to | |
| 3582 // use a stub like OptoRuntime::slow_arraycopy_Java. | |
| 3583 // This only works for expanding the current library call, | |
| 3584 // not another intrinsic. (E.g., don't use this for making an | |
| 3585 // arraycopy call inside of the copyOf intrinsic.) | |
| 3586 CallJavaNode* | |
| 3587 LibraryCallKit::generate_method_call(vmIntrinsics::ID method_id, bool is_virtual, bool is_static) { | |
| 3588 // When compiling the intrinsic method itself, do not use this technique. | |
| 3589 guarantee(callee() != C->method(), "cannot make slow-call to self"); | |
| 3590 | |
| 3591 ciMethod* method = callee(); | |
| 3592 // ensure the JVMS we have will be correct for this call | |
| 3593 guarantee(method_id == method->intrinsic_id(), "must match"); | |
| 3594 | |
| 3595 const TypeFunc* tf = TypeFunc::make(method); | |
| 3596 int tfdc = tf->domain()->cnt(); | |
| 3597 CallJavaNode* slow_call; | |
| 3598 if (is_static) { | |
| 3599 assert(!is_virtual, ""); | |
| 3600 slow_call = new(C, tfdc) CallStaticJavaNode(tf, | |
| 3601 SharedRuntime::get_resolve_static_call_stub(), | |
| 3602 method, bci()); | |
| 3603 } else if (is_virtual) { | |
| 3604 null_check_receiver(method); | |
| 3605 int vtable_index = methodOopDesc::invalid_vtable_index; | |
| 3606 if (UseInlineCaches) { | |
| 3607 // Suppress the vtable call | |
| 3608 } else { | |
| 3609 // hashCode and clone are not a miranda methods, | |
| 3610 // so the vtable index is fixed. | |
| 3611 // No need to use the linkResolver to get it. | |
| 3612 vtable_index = method->vtable_index(); | |
| 3613 } | |
| 3614 slow_call = new(C, tfdc) CallDynamicJavaNode(tf, | |
| 3615 SharedRuntime::get_resolve_virtual_call_stub(), | |
| 3616 method, vtable_index, bci()); | |
| 3617 } else { // neither virtual nor static: opt_virtual | |
| 3618 null_check_receiver(method); | |
| 3619 slow_call = new(C, tfdc) CallStaticJavaNode(tf, | |
| 3620 SharedRuntime::get_resolve_opt_virtual_call_stub(), | |
| 3621 method, bci()); | |
| 3622 slow_call->set_optimized_virtual(true); | |
| 3623 } | |
| 3624 set_arguments_for_java_call(slow_call); | |
| 3625 set_edges_for_java_call(slow_call); | |
| 3626 return slow_call; | |
| 3627 } | |
| 3628 | |
| 3629 | |
| 3630 //------------------------------inline_native_hashcode-------------------- | |
| 3631 // Build special case code for calls to hashCode on an object. | |
| 3632 bool LibraryCallKit::inline_native_hashcode(bool is_virtual, bool is_static) { | |
| 3633 assert(is_static == callee()->is_static(), "correct intrinsic selection"); | |
| 3634 assert(!(is_virtual && is_static), "either virtual, special, or static"); | |
| 3635 | |
| 3636 enum { _slow_path = 1, _fast_path, _null_path, PATH_LIMIT }; | |
| 3637 | |
| 3638 RegionNode* result_reg = new(C, PATH_LIMIT) RegionNode(PATH_LIMIT); | |
| 3639 PhiNode* result_val = new(C, PATH_LIMIT) PhiNode(result_reg, | |
| 3640 TypeInt::INT); | |
| 3641 PhiNode* result_io = new(C, PATH_LIMIT) PhiNode(result_reg, Type::ABIO); | |
| 3642 PhiNode* result_mem = new(C, PATH_LIMIT) PhiNode(result_reg, Type::MEMORY, | |
| 3643 TypePtr::BOTTOM); | |
| 3644 Node* obj = NULL; | |
| 3645 if (!is_static) { | |
| 3646 // Check for hashing null object | |
| 3647 obj = null_check_receiver(callee()); | |
| 3648 if (stopped()) return true; // unconditionally null | |
| 3649 result_reg->init_req(_null_path, top()); | |
| 3650 result_val->init_req(_null_path, top()); | |
| 3651 } else { | |
| 3652 // Do a null check, and return zero if null. | |
| 3653 // System.identityHashCode(null) == 0 | |
| 3654 obj = argument(0); | |
| 3655 Node* null_ctl = top(); | |
| 3656 obj = null_check_oop(obj, &null_ctl); | |
| 3657 result_reg->init_req(_null_path, null_ctl); | |
| 3658 result_val->init_req(_null_path, _gvn.intcon(0)); | |
| 3659 } | |
| 3660 | |
| 3661 // Unconditionally null? Then return right away. | |
| 3662 if (stopped()) { | |
| 3663 set_control( result_reg->in(_null_path) ); | |
| 3664 if (!stopped()) | |
| 3665 push( result_val ->in(_null_path) ); | |
| 3666 return true; | |
| 3667 } | |
| 3668 | |
| 3669 // After null check, get the object's klass. | |
| 3670 Node* obj_klass = load_object_klass(obj); | |
| 3671 | |
| 3672 // This call may be virtual (invokevirtual) or bound (invokespecial). | |
| 3673 // For each case we generate slightly different code. | |
| 3674 | |
| 3675 // We only go to the fast case code if we pass a number of guards. The | |
| 3676 // paths which do not pass are accumulated in the slow_region. | |
| 3677 RegionNode* slow_region = new (C, 1) RegionNode(1); | |
| 3678 record_for_igvn(slow_region); | |
| 3679 | |
| 3680 // If this is a virtual call, we generate a funny guard. We pull out | |
| 3681 // the vtable entry corresponding to hashCode() from the target object. | |
| 3682 // If the target method which we are calling happens to be the native | |
| 3683 // Object hashCode() method, we pass the guard. We do not need this | |
| 3684 // guard for non-virtual calls -- the caller is known to be the native | |
| 3685 // Object hashCode(). | |
| 3686 if (is_virtual) { | |
| 3687 generate_virtual_guard(obj_klass, slow_region); | |
| 3688 } | |
| 3689 | |
| 3690 // Get the header out of the object, use LoadMarkNode when available | |
| 3691 Node* header_addr = basic_plus_adr(obj, oopDesc::mark_offset_in_bytes()); | |
| 1609 | 3692 Node* header = make_load(control(), header_addr, TypeX_X, TypeX_X->basic_type()); |
| 0 | 3693 |
| 3694 // Test the header to see if it is unlocked. | |
| 3695 Node *lock_mask = _gvn.MakeConX(markOopDesc::biased_lock_mask_in_place); | |
| 3696 Node *lmasked_header = _gvn.transform( new (C, 3) AndXNode(header, lock_mask) ); | |
| 3697 Node *unlocked_val = _gvn.MakeConX(markOopDesc::unlocked_value); | |
| 3698 Node *chk_unlocked = _gvn.transform( new (C, 3) CmpXNode( lmasked_header, unlocked_val)); | |
| 3699 Node *test_unlocked = _gvn.transform( new (C, 2) BoolNode( chk_unlocked, BoolTest::ne) ); | |
| 3700 | |
| 3701 generate_slow_guard(test_unlocked, slow_region); | |
| 3702 | |
| 3703 // Get the hash value and check to see that it has been properly assigned. | |
| 3704 // We depend on hash_mask being at most 32 bits and avoid the use of | |
| 3705 // hash_mask_in_place because it could be larger than 32 bits in a 64-bit | |
| 3706 // vm: see markOop.hpp. | |
| 3707 Node *hash_mask = _gvn.intcon(markOopDesc::hash_mask); | |
| 3708 Node *hash_shift = _gvn.intcon(markOopDesc::hash_shift); | |
| 3709 Node *hshifted_header= _gvn.transform( new (C, 3) URShiftXNode(header, hash_shift) ); | |
| 3710 // This hack lets the hash bits live anywhere in the mark object now, as long | |
| 605 | 3711 // as the shift drops the relevant bits into the low 32 bits. Note that |
| 0 | 3712 // Java spec says that HashCode is an int so there's no point in capturing |
| 3713 // an 'X'-sized hashcode (32 in 32-bit build or 64 in 64-bit build). | |
| 3714 hshifted_header = ConvX2I(hshifted_header); | |
| 3715 Node *hash_val = _gvn.transform( new (C, 3) AndINode(hshifted_header, hash_mask) ); | |
| 3716 | |
| 3717 Node *no_hash_val = _gvn.intcon(markOopDesc::no_hash); | |
| 3718 Node *chk_assigned = _gvn.transform( new (C, 3) CmpINode( hash_val, no_hash_val)); | |
| 3719 Node *test_assigned = _gvn.transform( new (C, 2) BoolNode( chk_assigned, BoolTest::eq) ); | |
| 3720 | |
| 3721 generate_slow_guard(test_assigned, slow_region); | |
| 3722 | |
| 3723 Node* init_mem = reset_memory(); | |
| 3724 // fill in the rest of the null path: | |
| 3725 result_io ->init_req(_null_path, i_o()); | |
| 3726 result_mem->init_req(_null_path, init_mem); | |
| 3727 | |
| 3728 result_val->init_req(_fast_path, hash_val); | |
| 3729 result_reg->init_req(_fast_path, control()); | |
| 3730 result_io ->init_req(_fast_path, i_o()); | |
| 3731 result_mem->init_req(_fast_path, init_mem); | |
| 3732 | |
| 3733 // Generate code for the slow case. We make a call to hashCode(). | |
| 3734 set_control(_gvn.transform(slow_region)); | |
| 3735 if (!stopped()) { | |
| 3736 // No need for PreserveJVMState, because we're using up the present state. | |
| 3737 set_all_memory(init_mem); | |
| 3738 vmIntrinsics::ID hashCode_id = vmIntrinsics::_hashCode; | |
| 3739 if (is_static) hashCode_id = vmIntrinsics::_identityHashCode; | |
| 3740 CallJavaNode* slow_call = generate_method_call(hashCode_id, is_virtual, is_static); | |
| 3741 Node* slow_result = set_results_for_java_call(slow_call); | |
| 3742 // this->control() comes from set_results_for_java_call | |
| 3743 result_reg->init_req(_slow_path, control()); | |
| 3744 result_val->init_req(_slow_path, slow_result); | |
| 3745 result_io ->set_req(_slow_path, i_o()); | |
| 3746 result_mem ->set_req(_slow_path, reset_memory()); | |
| 3747 } | |
| 3748 | |
| 3749 // Return the combined state. | |
| 3750 set_i_o( _gvn.transform(result_io) ); | |
| 3751 set_all_memory( _gvn.transform(result_mem) ); | |
| 3752 push_result(result_reg, result_val); | |
| 3753 | |
| 3754 return true; | |
| 3755 } | |
| 3756 | |
| 3757 //---------------------------inline_native_getClass---------------------------- | |
| 605 | 3758 // Build special case code for calls to getClass on an object. |
| 0 | 3759 bool LibraryCallKit::inline_native_getClass() { |
| 3760 Node* obj = null_check_receiver(callee()); | |
| 3761 if (stopped()) return true; | |
| 3762 push( load_mirror_from_klass(load_object_klass(obj)) ); | |
| 3763 return true; | |
| 3764 } | |
| 3765 | |
| 3766 //-----------------inline_native_Reflection_getCallerClass--------------------- | |
| 3767 // In the presence of deep enough inlining, getCallerClass() becomes a no-op. | |
| 3768 // | |
| 3769 // NOTE that this code must perform the same logic as | |
| 3770 // vframeStream::security_get_caller_frame in that it must skip | |
| 3771 // Method.invoke() and auxiliary frames. | |
| 3772 | |
| 3773 | |
| 3774 | |
| 3775 | |
| 3776 bool LibraryCallKit::inline_native_Reflection_getCallerClass() { | |
| 3777 ciMethod* method = callee(); | |
| 3778 | |
| 3779 #ifndef PRODUCT | |
| 3780 if ((PrintIntrinsics || PrintInlining || PrintOptoInlining) && Verbose) { | |
| 3781 tty->print_cr("Attempting to inline sun.reflect.Reflection.getCallerClass"); | |
| 3782 } | |
| 3783 #endif | |
| 3784 | |
| 3785 debug_only(int saved_sp = _sp); | |
| 3786 | |
| 3787 // Argument words: (int depth) | |
| 3788 int nargs = 1; | |
| 3789 | |
| 3790 _sp += nargs; | |
| 3791 Node* caller_depth_node = pop(); | |
| 3792 | |
| 3793 assert(saved_sp == _sp, "must have correct argument count"); | |
| 3794 | |
| 3795 // The depth value must be a constant in order for the runtime call | |
| 3796 // to be eliminated. | |
| 3797 const TypeInt* caller_depth_type = _gvn.type(caller_depth_node)->isa_int(); | |
| 3798 if (caller_depth_type == NULL || !caller_depth_type->is_con()) { | |
| 3799 #ifndef PRODUCT | |
| 3800 if ((PrintIntrinsics || PrintInlining || PrintOptoInlining) && Verbose) { | |
| 3801 tty->print_cr(" Bailing out because caller depth was not a constant"); | |
| 3802 } | |
| 3803 #endif | |
| 3804 return false; | |
| 3805 } | |
| 3806 // Note that the JVM state at this point does not include the | |
| 3807 // getCallerClass() frame which we are trying to inline. The | |
| 3808 // semantics of getCallerClass(), however, are that the "first" | |
| 3809 // frame is the getCallerClass() frame, so we subtract one from the | |
| 3810 // requested depth before continuing. We don't inline requests of | |
| 3811 // getCallerClass(0). | |
| 3812 int caller_depth = caller_depth_type->get_con() - 1; | |
| 3813 if (caller_depth < 0) { | |
| 3814 #ifndef PRODUCT | |
| 3815 if ((PrintIntrinsics || PrintInlining || PrintOptoInlining) && Verbose) { | |
| 3816 tty->print_cr(" Bailing out because caller depth was %d", caller_depth); | |
| 3817 } | |
| 3818 #endif | |
| 3819 return false; | |
| 3820 } | |
| 3821 | |
| 3822 if (!jvms()->has_method()) { | |
| 3823 #ifndef PRODUCT | |
| 3824 if ((PrintIntrinsics || PrintInlining || PrintOptoInlining) && Verbose) { | |
| 3825 tty->print_cr(" Bailing out because intrinsic was inlined at top level"); | |
| 3826 } | |
| 3827 #endif | |
| 3828 return false; | |
| 3829 } | |
| 3830 int _depth = jvms()->depth(); // cache call chain depth | |
| 3831 | |
| 3832 // Walk back up the JVM state to find the caller at the required | |
| 3833 // depth. NOTE that this code must perform the same logic as | |
| 3834 // vframeStream::security_get_caller_frame in that it must skip | |
| 3835 // Method.invoke() and auxiliary frames. Note also that depth is | |
| 3836 // 1-based (1 is the bottom of the inlining). | |
| 3837 int inlining_depth = _depth; | |
| 3838 JVMState* caller_jvms = NULL; | |
| 3839 | |
| 3840 if (inlining_depth > 0) { | |
| 3841 caller_jvms = jvms(); | |
| 3842 assert(caller_jvms = jvms()->of_depth(inlining_depth), "inlining_depth == our depth"); | |
| 3843 do { | |
| 3844 // The following if-tests should be performed in this order | |
| 3845 if (is_method_invoke_or_aux_frame(caller_jvms)) { | |
| 3846 // Skip a Method.invoke() or auxiliary frame | |
| 3847 } else if (caller_depth > 0) { | |
| 3848 // Skip real frame | |
| 3849 --caller_depth; | |
| 3850 } else { | |
| 3851 // We're done: reached desired caller after skipping. | |
| 3852 break; | |
| 3853 } | |
| 3854 caller_jvms = caller_jvms->caller(); | |
| 3855 --inlining_depth; | |
| 3856 } while (inlining_depth > 0); | |
| 3857 } | |
| 3858 | |
| 3859 if (inlining_depth == 0) { | |
| 3860 #ifndef PRODUCT | |
| 3861 if ((PrintIntrinsics || PrintInlining || PrintOptoInlining) && Verbose) { | |
| 3862 tty->print_cr(" Bailing out because caller depth (%d) exceeded inlining depth (%d)", caller_depth_type->get_con(), _depth); | |
| 3863 tty->print_cr(" JVM state at this point:"); | |
| 3864 for (int i = _depth; i >= 1; i--) { | |
| 3865 tty->print_cr(" %d) %s", i, jvms()->of_depth(i)->method()->name()->as_utf8()); | |
| 3866 } | |
| 3867 } | |
| 3868 #endif | |
| 3869 return false; // Reached end of inlining | |
| 3870 } | |
| 3871 | |
| 3872 // Acquire method holder as java.lang.Class | |
| 3873 ciInstanceKlass* caller_klass = caller_jvms->method()->holder(); | |
| 3874 ciInstance* caller_mirror = caller_klass->java_mirror(); | |
| 3875 // Push this as a constant | |
| 3876 push(makecon(TypeInstPtr::make(caller_mirror))); | |
| 3877 #ifndef PRODUCT | |
| 3878 if ((PrintIntrinsics || PrintInlining || PrintOptoInlining) && Verbose) { | |
| 3879 tty->print_cr(" Succeeded: caller = %s.%s, caller depth = %d, depth = %d", caller_klass->name()->as_utf8(), caller_jvms->method()->name()->as_utf8(), caller_depth_type->get_con(), _depth); | |
| 3880 tty->print_cr(" JVM state at this point:"); | |
| 3881 for (int i = _depth; i >= 1; i--) { | |
| 3882 tty->print_cr(" %d) %s", i, jvms()->of_depth(i)->method()->name()->as_utf8()); | |
| 3883 } | |
| 3884 } | |
| 3885 #endif | |
| 3886 return true; | |
| 3887 } | |
| 3888 | |
| 3889 // Helper routine for above | |
| 3890 bool LibraryCallKit::is_method_invoke_or_aux_frame(JVMState* jvms) { | |
|
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3891 ciMethod* method = jvms->method(); |
|
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3892 |
| 0 | 3893 // Is this the Method.invoke method itself? |
|
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3894 if (method->intrinsic_id() == vmIntrinsics::_invoke) |
| 0 | 3895 return true; |
| 3896 | |
| 3897 // Is this a helper, defined somewhere underneath MethodAccessorImpl. | |
|
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3898 ciKlass* k = method->holder(); |
| 0 | 3899 if (k->is_instance_klass()) { |
| 3900 ciInstanceKlass* ik = k->as_instance_klass(); | |
| 3901 for (; ik != NULL; ik = ik->super()) { | |
| 3902 if (ik->name() == ciSymbol::sun_reflect_MethodAccessorImpl() && | |
| 3903 ik == env()->find_system_klass(ik->name())) { | |
| 3904 return true; | |
| 3905 } | |
| 3906 } | |
| 3907 } | |
|
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|
3908 else if (method->is_method_handle_adapter()) { |
|
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3909 // This is an internal adapter frame from the MethodHandleCompiler -- skip it |
|
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3910 return true; |
|
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|
3911 } |
| 0 | 3912 |
| 3913 return false; | |
| 3914 } | |
| 3915 | |
| 3916 static int value_field_offset = -1; // offset of the "value" field of AtomicLongCSImpl. This is needed by | |
| 3917 // inline_native_AtomicLong_attemptUpdate() but it has no way of | |
| 3918 // computing it since there is no lookup field by name function in the | |
| 3919 // CI interface. This is computed and set by inline_native_AtomicLong_get(). | |
| 3920 // Using a static variable here is safe even if we have multiple compilation | |
| 3921 // threads because the offset is constant. At worst the same offset will be | |
| 3922 // computed and stored multiple | |
| 3923 | |
| 3924 bool LibraryCallKit::inline_native_AtomicLong_get() { | |
| 3925 // Restore the stack and pop off the argument | |
| 3926 _sp+=1; | |
| 3927 Node *obj = pop(); | |
| 3928 | |
| 3929 // get the offset of the "value" field. Since the CI interfaces | |
| 3930 // does not provide a way to look up a field by name, we scan the bytecodes | |
| 3931 // to get the field index. We expect the first 2 instructions of the method | |
| 3932 // to be: | |
| 3933 // 0 aload_0 | |
| 3934 // 1 getfield "value" | |
| 3935 ciMethod* method = callee(); | |
| 3936 if (value_field_offset == -1) | |
| 3937 { | |
| 3938 ciField* value_field; | |
| 3939 ciBytecodeStream iter(method); | |
| 3940 Bytecodes::Code bc = iter.next(); | |
| 3941 | |
| 3942 if ((bc != Bytecodes::_aload_0) && | |
| 3943 ((bc != Bytecodes::_aload) || (iter.get_index() != 0))) | |
| 3944 return false; | |
| 3945 bc = iter.next(); | |
| 3946 if (bc != Bytecodes::_getfield) | |
| 3947 return false; | |
| 3948 bool ignore; | |
| 3949 value_field = iter.get_field(ignore); | |
| 3950 value_field_offset = value_field->offset_in_bytes(); | |
| 3951 } | |
| 3952 | |
| 3953 // Null check without removing any arguments. | |
| 3954 _sp++; | |
| 3955 obj = do_null_check(obj, T_OBJECT); | |
| 3956 _sp--; | |
| 3957 // Check for locking null object | |
| 3958 if (stopped()) return true; | |
| 3959 | |
| 3960 Node *adr = basic_plus_adr(obj, obj, value_field_offset); | |
| 3961 const TypePtr *adr_type = _gvn.type(adr)->is_ptr(); | |
| 3962 int alias_idx = C->get_alias_index(adr_type); | |
| 3963 | |
| 3964 Node *result = _gvn.transform(new (C, 3) LoadLLockedNode(control(), memory(alias_idx), adr)); | |
| 3965 | |
| 3966 push_pair(result); | |
| 3967 | |
| 3968 return true; | |
| 3969 } | |
| 3970 | |
| 3971 bool LibraryCallKit::inline_native_AtomicLong_attemptUpdate() { | |
| 3972 // Restore the stack and pop off the arguments | |
| 3973 _sp+=5; | |
| 3974 Node *newVal = pop_pair(); | |
| 3975 Node *oldVal = pop_pair(); | |
| 3976 Node *obj = pop(); | |
| 3977 | |
| 3978 // we need the offset of the "value" field which was computed when | |
| 3979 // inlining the get() method. Give up if we don't have it. | |
| 3980 if (value_field_offset == -1) | |
| 3981 return false; | |
| 3982 | |
| 3983 // Null check without removing any arguments. | |
| 3984 _sp+=5; | |
| 3985 obj = do_null_check(obj, T_OBJECT); | |
| 3986 _sp-=5; | |
| 3987 // Check for locking null object | |
| 3988 if (stopped()) return true; | |
| 3989 | |
| 3990 Node *adr = basic_plus_adr(obj, obj, value_field_offset); | |
| 3991 const TypePtr *adr_type = _gvn.type(adr)->is_ptr(); | |
| 3992 int alias_idx = C->get_alias_index(adr_type); | |
| 3993 | |
|
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3994 Node *cas = _gvn.transform(new (C, 5) StoreLConditionalNode(control(), memory(alias_idx), adr, newVal, oldVal)); |
|
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3995 Node *store_proj = _gvn.transform( new (C, 1) SCMemProjNode(cas)); |
| 0 | 3996 set_memory(store_proj, alias_idx); |
|
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3997 Node *bol = _gvn.transform( new (C, 2) BoolNode( cas, BoolTest::eq ) ); |
|
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3998 |
|
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3999 Node *result; |
|
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4000 // CMove node is not used to be able fold a possible check code |
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4001 // after attemptUpdate() call. This code could be transformed |
|
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4002 // into CMove node by loop optimizations. |
|
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4003 { |
|
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4004 RegionNode *r = new (C, 3) RegionNode(3); |
|
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4005 result = new (C, 3) PhiNode(r, TypeInt::BOOL); |
|
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4006 |
|
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4007 Node *iff = create_and_xform_if(control(), bol, PROB_FAIR, COUNT_UNKNOWN); |
|
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4008 Node *iftrue = opt_iff(r, iff); |
|
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4009 r->init_req(1, iftrue); |
|
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4010 result->init_req(1, intcon(1)); |
|
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|
4011 result->init_req(2, intcon(0)); |
|
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|
4012 |
|
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|
4013 set_control(_gvn.transform(r)); |
|
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|
4014 record_for_igvn(r); |
|
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|
4015 |
|
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4016 C->set_has_split_ifs(true); // Has chance for split-if optimization |
|
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|
4017 } |
|
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|
4018 |
|
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4019 push(_gvn.transform(result)); |
| 0 | 4020 return true; |
| 4021 } | |
| 4022 | |
| 4023 bool LibraryCallKit::inline_fp_conversions(vmIntrinsics::ID id) { | |
| 4024 // restore the arguments | |
| 4025 _sp += arg_size(); | |
| 4026 | |
| 4027 switch (id) { | |
| 4028 case vmIntrinsics::_floatToRawIntBits: | |
| 4029 push(_gvn.transform( new (C, 2) MoveF2INode(pop()))); | |
| 4030 break; | |
| 4031 | |
| 4032 case vmIntrinsics::_intBitsToFloat: | |
| 4033 push(_gvn.transform( new (C, 2) MoveI2FNode(pop()))); | |
| 4034 break; | |
| 4035 | |
| 4036 case vmIntrinsics::_doubleToRawLongBits: | |
| 4037 push_pair(_gvn.transform( new (C, 2) MoveD2LNode(pop_pair()))); | |
| 4038 break; | |
| 4039 | |
| 4040 case vmIntrinsics::_longBitsToDouble: | |
| 4041 push_pair(_gvn.transform( new (C, 2) MoveL2DNode(pop_pair()))); | |
| 4042 break; | |
| 4043 | |
| 4044 case vmIntrinsics::_doubleToLongBits: { | |
| 4045 Node* value = pop_pair(); | |
| 4046 | |
| 4047 // two paths (plus control) merge in a wood | |
| 4048 RegionNode *r = new (C, 3) RegionNode(3); | |
| 4049 Node *phi = new (C, 3) PhiNode(r, TypeLong::LONG); | |
| 4050 | |
| 4051 Node *cmpisnan = _gvn.transform( new (C, 3) CmpDNode(value, value)); | |
| 4052 // Build the boolean node | |
| 4053 Node *bolisnan = _gvn.transform( new (C, 2) BoolNode( cmpisnan, BoolTest::ne ) ); | |
| 4054 | |
| 4055 // Branch either way. | |
| 4056 // NaN case is less traveled, which makes all the difference. | |
| 4057 IfNode *ifisnan = create_and_xform_if(control(), bolisnan, PROB_STATIC_FREQUENT, COUNT_UNKNOWN); | |
| 4058 Node *opt_isnan = _gvn.transform(ifisnan); | |
| 4059 assert( opt_isnan->is_If(), "Expect an IfNode"); | |
| 4060 IfNode *opt_ifisnan = (IfNode*)opt_isnan; | |
| 4061 Node *iftrue = _gvn.transform( new (C, 1) IfTrueNode(opt_ifisnan) ); | |
| 4062 | |
| 4063 set_control(iftrue); | |
| 4064 | |
| 4065 static const jlong nan_bits = CONST64(0x7ff8000000000000); | |
| 4066 Node *slow_result = longcon(nan_bits); // return NaN | |
| 4067 phi->init_req(1, _gvn.transform( slow_result )); | |
| 4068 r->init_req(1, iftrue); | |
| 4069 | |
| 4070 // Else fall through | |
| 4071 Node *iffalse = _gvn.transform( new (C, 1) IfFalseNode(opt_ifisnan) ); | |
| 4072 set_control(iffalse); | |
| 4073 | |
| 4074 phi->init_req(2, _gvn.transform( new (C, 2) MoveD2LNode(value))); | |
| 4075 r->init_req(2, iffalse); | |
| 4076 | |
| 4077 // Post merge | |
| 4078 set_control(_gvn.transform(r)); | |
| 4079 record_for_igvn(r); | |
| 4080 | |
| 4081 Node* result = _gvn.transform(phi); | |
| 4082 assert(result->bottom_type()->isa_long(), "must be"); | |
| 4083 push_pair(result); | |
| 4084 | |
| 4085 C->set_has_split_ifs(true); // Has chance for split-if optimization | |
| 4086 | |
| 4087 break; | |
| 4088 } | |
| 4089 | |
| 4090 case vmIntrinsics::_floatToIntBits: { | |
| 4091 Node* value = pop(); | |
| 4092 | |
| 4093 // two paths (plus control) merge in a wood | |
| 4094 RegionNode *r = new (C, 3) RegionNode(3); | |
| 4095 Node *phi = new (C, 3) PhiNode(r, TypeInt::INT); | |
| 4096 | |
| 4097 Node *cmpisnan = _gvn.transform( new (C, 3) CmpFNode(value, value)); | |
| 4098 // Build the boolean node | |
| 4099 Node *bolisnan = _gvn.transform( new (C, 2) BoolNode( cmpisnan, BoolTest::ne ) ); | |
| 4100 | |
| 4101 // Branch either way. | |
| 4102 // NaN case is less traveled, which makes all the difference. | |
| 4103 IfNode *ifisnan = create_and_xform_if(control(), bolisnan, PROB_STATIC_FREQUENT, COUNT_UNKNOWN); | |
| 4104 Node *opt_isnan = _gvn.transform(ifisnan); | |
| 4105 assert( opt_isnan->is_If(), "Expect an IfNode"); | |
| 4106 IfNode *opt_ifisnan = (IfNode*)opt_isnan; | |
| 4107 Node *iftrue = _gvn.transform( new (C, 1) IfTrueNode(opt_ifisnan) ); | |
| 4108 | |
| 4109 set_control(iftrue); | |
| 4110 | |
| 4111 static const jint nan_bits = 0x7fc00000; | |
| 4112 Node *slow_result = makecon(TypeInt::make(nan_bits)); // return NaN | |
| 4113 phi->init_req(1, _gvn.transform( slow_result )); | |
| 4114 r->init_req(1, iftrue); | |
| 4115 | |
| 4116 // Else fall through | |
| 4117 Node *iffalse = _gvn.transform( new (C, 1) IfFalseNode(opt_ifisnan) ); | |
| 4118 set_control(iffalse); | |
| 4119 | |
| 4120 phi->init_req(2, _gvn.transform( new (C, 2) MoveF2INode(value))); | |
| 4121 r->init_req(2, iffalse); | |
| 4122 | |
| 4123 // Post merge | |
| 4124 set_control(_gvn.transform(r)); | |
| 4125 record_for_igvn(r); | |
| 4126 | |
| 4127 Node* result = _gvn.transform(phi); | |
| 4128 assert(result->bottom_type()->isa_int(), "must be"); | |
| 4129 push(result); | |
| 4130 | |
| 4131 C->set_has_split_ifs(true); // Has chance for split-if optimization | |
| 4132 | |
| 4133 break; | |
| 4134 } | |
| 4135 | |
| 4136 default: | |
| 4137 ShouldNotReachHere(); | |
| 4138 } | |
| 4139 | |
| 4140 return true; | |
| 4141 } | |
| 4142 | |
| 4143 #ifdef _LP64 | |
| 4144 #define XTOP ,top() /*additional argument*/ | |
| 4145 #else //_LP64 | |
| 4146 #define XTOP /*no additional argument*/ | |
| 4147 #endif //_LP64 | |
| 4148 | |
| 4149 //----------------------inline_unsafe_copyMemory------------------------- | |
| 4150 bool LibraryCallKit::inline_unsafe_copyMemory() { | |
| 4151 if (callee()->is_static()) return false; // caller must have the capability! | |
| 4152 int nargs = 1 + 5 + 3; // 5 args: (src: ptr,off, dst: ptr,off, size) | |
| 4153 assert(signature()->size() == nargs-1, "copy has 5 arguments"); | |
| 4154 null_check_receiver(callee()); // check then ignore argument(0) | |
| 4155 if (stopped()) return true; | |
| 4156 | |
| 4157 C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe". | |
| 4158 | |
| 4159 Node* src_ptr = argument(1); | |
| 4160 Node* src_off = ConvL2X(argument(2)); | |
| 4161 assert(argument(3)->is_top(), "2nd half of long"); | |
| 4162 Node* dst_ptr = argument(4); | |
| 4163 Node* dst_off = ConvL2X(argument(5)); | |
| 4164 assert(argument(6)->is_top(), "2nd half of long"); | |
| 4165 Node* size = ConvL2X(argument(7)); | |
| 4166 assert(argument(8)->is_top(), "2nd half of long"); | |
| 4167 | |
| 4168 assert(Unsafe_field_offset_to_byte_offset(11) == 11, | |
| 4169 "fieldOffset must be byte-scaled"); | |
| 4170 | |
| 4171 Node* src = make_unsafe_address(src_ptr, src_off); | |
| 4172 Node* dst = make_unsafe_address(dst_ptr, dst_off); | |
| 4173 | |
| 4174 // Conservatively insert a memory barrier on all memory slices. | |
| 4175 // Do not let writes of the copy source or destination float below the copy. | |
| 4176 insert_mem_bar(Op_MemBarCPUOrder); | |
| 4177 | |
| 4178 // Call it. Note that the length argument is not scaled. | |
| 4179 make_runtime_call(RC_LEAF|RC_NO_FP, | |
| 4180 OptoRuntime::fast_arraycopy_Type(), | |
| 4181 StubRoutines::unsafe_arraycopy(), | |
| 4182 "unsafe_arraycopy", | |
| 4183 TypeRawPtr::BOTTOM, | |
| 4184 src, dst, size XTOP); | |
| 4185 | |
| 4186 // Do not let reads of the copy destination float above the copy. | |
| 4187 insert_mem_bar(Op_MemBarCPUOrder); | |
| 4188 | |
| 4189 return true; | |
| 4190 } | |
| 4191 | |
|
833
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6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
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827
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changeset
|
4192 //------------------------clone_coping----------------------------------- |
|
acba6af809c8
6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
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changeset
|
4193 // Helper function for inline_native_clone. |
|
acba6af809c8
6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
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changeset
|
4194 void LibraryCallKit::copy_to_clone(Node* obj, Node* alloc_obj, Node* obj_size, bool is_array, bool card_mark) { |
|
acba6af809c8
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changeset
|
4195 assert(obj_size != NULL, ""); |
|
acba6af809c8
6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
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827
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changeset
|
4196 Node* raw_obj = alloc_obj->in(1); |
|
acba6af809c8
6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
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changeset
|
4197 assert(alloc_obj->is_CheckCastPP() && raw_obj->is_Proj() && raw_obj->in(0)->is_Allocate(), ""); |
|
acba6af809c8
6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
kvn
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changeset
|
4198 |
|
acba6af809c8
6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
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changeset
|
4199 if (ReduceBulkZeroing) { |
|
acba6af809c8
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changeset
|
4200 // We will be completely responsible for initializing this object - |
|
acba6af809c8
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changeset
|
4201 // mark Initialize node as complete. |
|
acba6af809c8
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changeset
|
4202 AllocateNode* alloc = AllocateNode::Ideal_allocation(alloc_obj, &_gvn); |
|
acba6af809c8
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changeset
|
4203 // The object was just allocated - there should be no any stores! |
|
acba6af809c8
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changeset
|
4204 guarantee(alloc != NULL && alloc->maybe_set_complete(&_gvn), ""); |
|
acba6af809c8
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changeset
|
4205 } |
|
acba6af809c8
6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
kvn
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changeset
|
4206 |
|
acba6af809c8
6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
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changeset
|
4207 // Copy the fastest available way. |
|
acba6af809c8
6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
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changeset
|
4208 // TODO: generate fields copies for small objects instead. |
|
acba6af809c8
6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
kvn
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827
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changeset
|
4209 Node* src = obj; |
|
958
c7e94e8fff43
6880053: assert(alloc_obj->as_CheckCastPP()->type() != TypeInstPtr::NOTNULL)
kvn
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950
diff
changeset
|
4210 Node* dest = alloc_obj; |
|
833
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kvn
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changeset
|
4211 Node* size = _gvn.transform(obj_size); |
|
acba6af809c8
6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
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changeset
|
4212 |
|
acba6af809c8
6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
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changeset
|
4213 // Exclude the header but include array length to copy by 8 bytes words. |
|
acba6af809c8
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changeset
|
4214 // Can't use base_offset_in_bytes(bt) since basic type is unknown. |
|
acba6af809c8
6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
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827
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changeset
|
4215 int base_off = is_array ? arrayOopDesc::length_offset_in_bytes() : |
|
acba6af809c8
6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
kvn
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changeset
|
4216 instanceOopDesc::base_offset_in_bytes(); |
|
acba6af809c8
6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
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changeset
|
4217 // base_off: |
|
acba6af809c8
6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
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changeset
|
4218 // 8 - 32-bit VM |
|
acba6af809c8
6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
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827
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changeset
|
4219 // 12 - 64-bit VM, compressed oops |
|
acba6af809c8
6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
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827
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changeset
|
4220 // 16 - 64-bit VM, normal oops |
|
acba6af809c8
6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
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changeset
|
4221 if (base_off % BytesPerLong != 0) { |
|
acba6af809c8
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changeset
|
4222 assert(UseCompressedOops, ""); |
|
acba6af809c8
6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
kvn
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changeset
|
4223 if (is_array) { |
|
acba6af809c8
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changeset
|
4224 // Exclude length to copy by 8 bytes words. |
|
acba6af809c8
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changeset
|
4225 base_off += sizeof(int); |
|
acba6af809c8
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kvn
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changeset
|
4226 } else { |
|
acba6af809c8
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changeset
|
4227 // Include klass to copy by 8 bytes words. |
|
acba6af809c8
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changeset
|
4228 base_off = instanceOopDesc::klass_offset_in_bytes(); |
|
acba6af809c8
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changeset
|
4229 } |
|
acba6af809c8
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changeset
|
4230 assert(base_off % BytesPerLong == 0, "expect 8 bytes alignment"); |
|
acba6af809c8
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changeset
|
4231 } |
|
acba6af809c8
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changeset
|
4232 src = basic_plus_adr(src, base_off); |
|
acba6af809c8
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changeset
|
4233 dest = basic_plus_adr(dest, base_off); |
|
acba6af809c8
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changeset
|
4234 |
|
acba6af809c8
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kvn
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changeset
|
4235 // Compute the length also, if needed: |
|
acba6af809c8
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kvn
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changeset
|
4236 Node* countx = size; |
|
acba6af809c8
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kvn
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changeset
|
4237 countx = _gvn.transform( new (C, 3) SubXNode(countx, MakeConX(base_off)) ); |
|
acba6af809c8
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changeset
|
4238 countx = _gvn.transform( new (C, 3) URShiftXNode(countx, intcon(LogBytesPerLong) )); |
|
acba6af809c8
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kvn
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changeset
|
4239 |
|
acba6af809c8
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changeset
|
4240 const TypePtr* raw_adr_type = TypeRawPtr::BOTTOM; |
|
acba6af809c8
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changeset
|
4241 bool disjoint_bases = true; |
|
acba6af809c8
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changeset
|
4242 generate_unchecked_arraycopy(raw_adr_type, T_LONG, disjoint_bases, |
| 2324 | 4243 src, NULL, dest, NULL, countx, |
| 4244 /*dest_uninitialized*/true); | |
|
833
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changeset
|
4245 |
|
acba6af809c8
6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
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changeset
|
4246 // If necessary, emit some card marks afterwards. (Non-arrays only.) |
|
acba6af809c8
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changeset
|
4247 if (card_mark) { |
|
acba6af809c8
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changeset
|
4248 assert(!is_array, ""); |
|
acba6af809c8
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changeset
|
4249 // Put in store barrier for any and all oops we are sticking |
|
acba6af809c8
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changeset
|
4250 // into this object. (We could avoid this if we could prove |
|
acba6af809c8
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changeset
|
4251 // that the object type contains no oop fields at all.) |
|
acba6af809c8
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changeset
|
4252 Node* no_particular_value = NULL; |
|
acba6af809c8
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changeset
|
4253 Node* no_particular_field = NULL; |
|
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changeset
|
4254 int raw_adr_idx = Compile::AliasIdxRaw; |
|
acba6af809c8
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changeset
|
4255 post_barrier(control(), |
|
acba6af809c8
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changeset
|
4256 memory(raw_adr_type), |
|
958
c7e94e8fff43
6880053: assert(alloc_obj->as_CheckCastPP()->type() != TypeInstPtr::NOTNULL)
kvn
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950
diff
changeset
|
4257 alloc_obj, |
|
833
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changeset
|
4258 no_particular_field, |
|
acba6af809c8
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changeset
|
4259 raw_adr_idx, |
|
acba6af809c8
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changeset
|
4260 no_particular_value, |
|
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827
diff
changeset
|
4261 T_OBJECT, |
|
acba6af809c8
6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
kvn
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827
diff
changeset
|
4262 false); |
|
acba6af809c8
6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
kvn
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827
diff
changeset
|
4263 } |
|
acba6af809c8
6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
kvn
parents:
827
diff
changeset
|
4264 |
|
958
c7e94e8fff43
6880053: assert(alloc_obj->as_CheckCastPP()->type() != TypeInstPtr::NOTNULL)
kvn
parents:
950
diff
changeset
|
4265 // Do not let reads from the cloned object float above the arraycopy. |
|
c7e94e8fff43
6880053: assert(alloc_obj->as_CheckCastPP()->type() != TypeInstPtr::NOTNULL)
kvn
parents:
950
diff
changeset
|
4266 insert_mem_bar(Op_MemBarCPUOrder); |
|
833
acba6af809c8
6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
kvn
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827
diff
changeset
|
4267 } |
| 0 | 4268 |
| 4269 //------------------------inline_native_clone---------------------------- | |
| 4270 // Here are the simple edge cases: | |
| 4271 // null receiver => normal trap | |
| 4272 // virtual and clone was overridden => slow path to out-of-line clone | |
| 4273 // not cloneable or finalizer => slow path to out-of-line Object.clone | |
| 4274 // | |
| 4275 // The general case has two steps, allocation and copying. | |
| 4276 // Allocation has two cases, and uses GraphKit::new_instance or new_array. | |
| 4277 // | |
| 4278 // Copying also has two cases, oop arrays and everything else. | |
| 4279 // Oop arrays use arrayof_oop_arraycopy (same as System.arraycopy). | |
| 4280 // Everything else uses the tight inline loop supplied by CopyArrayNode. | |
| 4281 // | |
| 4282 // These steps fold up nicely if and when the cloned object's klass | |
| 4283 // can be sharply typed as an object array, a type array, or an instance. | |
| 4284 // | |
| 4285 bool LibraryCallKit::inline_native_clone(bool is_virtual) { | |
| 4286 int nargs = 1; | |
|
902
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4287 PhiNode* result_val; |
| 0 | 4288 |
|
900
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4289 //set the original stack and the reexecute bit for the interpreter to reexecute |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4290 //the bytecode that invokes Object.clone if deoptimization happens |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
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diff
changeset
|
4291 { PreserveReexecuteState preexecs(this); |
|
902
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4292 jvms()->set_should_reexecute(true); |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4293 |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4294 //null_check_receiver will adjust _sp (push and pop) |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4295 Node* obj = null_check_receiver(callee()); |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4296 if (stopped()) return true; |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4297 |
|
900
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4298 _sp += nargs; |
|
902
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4299 |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4300 Node* obj_klass = load_object_klass(obj); |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4301 const TypeKlassPtr* tklass = _gvn.type(obj_klass)->isa_klassptr(); |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
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900
diff
changeset
|
4302 const TypeOopPtr* toop = ((tklass != NULL) |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4303 ? tklass->as_instance_type() |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4304 : TypeInstPtr::NOTNULL); |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4305 |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4306 // Conservatively insert a memory barrier on all memory slices. |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4307 // Do not let writes into the original float below the clone. |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4308 insert_mem_bar(Op_MemBarCPUOrder); |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4309 |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4310 // paths into result_reg: |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4311 enum { |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4312 _slow_path = 1, // out-of-line call to clone method (virtual or not) |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4313 _objArray_path, // plain array allocation, plus arrayof_oop_arraycopy |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4314 _array_path, // plain array allocation, plus arrayof_long_arraycopy |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4315 _instance_path, // plain instance allocation, plus arrayof_long_arraycopy |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4316 PATH_LIMIT |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4317 }; |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4318 RegionNode* result_reg = new(C, PATH_LIMIT) RegionNode(PATH_LIMIT); |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4319 result_val = new(C, PATH_LIMIT) PhiNode(result_reg, |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4320 TypeInstPtr::NOTNULL); |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4321 PhiNode* result_i_o = new(C, PATH_LIMIT) PhiNode(result_reg, Type::ABIO); |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4322 PhiNode* result_mem = new(C, PATH_LIMIT) PhiNode(result_reg, Type::MEMORY, |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4323 TypePtr::BOTTOM); |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4324 record_for_igvn(result_reg); |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4325 |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4326 const TypePtr* raw_adr_type = TypeRawPtr::BOTTOM; |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4327 int raw_adr_idx = Compile::AliasIdxRaw; |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4328 const bool raw_mem_only = true; |
|
fc2281ddce3c
6868269: CompileTheWorld assertion failure introduced by the reexecute bit implementation
cfang
parents:
900
diff
changeset
|
4329 |
|
900
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4330 |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4331 Node* array_ctl = generate_array_guard(obj_klass, (RegionNode*)NULL); |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4332 if (array_ctl != NULL) { |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4333 // It's an array. |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4334 PreserveJVMState pjvms(this); |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4335 set_control(array_ctl); |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4336 Node* obj_length = load_array_length(obj); |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4337 Node* obj_size = NULL; |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4338 Node* alloc_obj = new_array(obj_klass, obj_length, 0, |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4339 raw_mem_only, &obj_size); |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4340 |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4341 if (!use_ReduceInitialCardMarks()) { |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4342 // If it is an oop array, it requires very special treatment, |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4343 // because card marking is required on each card of the array. |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4344 Node* is_obja = generate_objArray_guard(obj_klass, (RegionNode*)NULL); |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4345 if (is_obja != NULL) { |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4346 PreserveJVMState pjvms2(this); |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4347 set_control(is_obja); |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4348 // Generate a direct call to the right arraycopy function(s). |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4349 bool disjoint_bases = true; |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4350 bool length_never_negative = true; |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4351 generate_arraycopy(TypeAryPtr::OOPS, T_OBJECT, |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4352 obj, intcon(0), alloc_obj, intcon(0), |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4353 obj_length, |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4354 disjoint_bases, length_never_negative); |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4355 result_reg->init_req(_objArray_path, control()); |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4356 result_val->init_req(_objArray_path, alloc_obj); |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4357 result_i_o ->set_req(_objArray_path, i_o()); |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4358 result_mem ->set_req(_objArray_path, reset_memory()); |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4359 } |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4360 } |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4361 // Otherwise, there are no card marks to worry about. |
|
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
986
diff
changeset
|
4362 // (We can dispense with card marks if we know the allocation |
|
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
986
diff
changeset
|
4363 // comes out of eden (TLAB)... In fact, ReduceInitialCardMarks |
|
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
986
diff
changeset
|
4364 // causes the non-eden paths to take compensating steps to |
|
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
986
diff
changeset
|
4365 // simulate a fresh allocation, so that no further |
|
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
986
diff
changeset
|
4366 // card marks are required in compiled code to initialize |
|
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
986
diff
changeset
|
4367 // the object.) |
|
900
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4368 |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4369 if (!stopped()) { |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4370 copy_to_clone(obj, alloc_obj, obj_size, true, false); |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4371 |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4372 // Present the results of the copy. |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4373 result_reg->init_req(_array_path, control()); |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4374 result_val->init_req(_array_path, alloc_obj); |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4375 result_i_o ->set_req(_array_path, i_o()); |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4376 result_mem ->set_req(_array_path, reset_memory()); |
| 0 | 4377 } |
| 4378 } | |
|
900
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4379 |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4380 // We only go to the instance fast case code if we pass a number of guards. |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4381 // The paths which do not pass are accumulated in the slow_region. |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4382 RegionNode* slow_region = new (C, 1) RegionNode(1); |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4383 record_for_igvn(slow_region); |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4384 if (!stopped()) { |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4385 // It's an instance (we did array above). Make the slow-path tests. |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4386 // If this is a virtual call, we generate a funny guard. We grab |
|
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
896
diff
changeset
|
4387 // the vtable entry corresponding to clone() from the target object. |
|
9987d9d5eb0e
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|
4388 // If the target method which we are calling happens to be the |
|
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|
4389 // Object clone() method, we pass the guard. We do not need this |
|
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|
4390 // guard for non-virtual calls; the caller is known to be the native |
|
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|
4391 // Object clone(). |
|
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6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
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|
4392 if (is_virtual) { |
|
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6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
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|
4393 generate_virtual_guard(obj_klass, slow_region); |
|
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6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
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|
4394 } |
|
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|
4395 |
|
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|
4396 // The object must be cloneable and must not have a finalizer. |
|
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|
4397 // Both of these conditions may be checked in a single test. |
|
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|
4398 // We could optimize the cloneable test further, but we don't care. |
|
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|
4399 generate_access_flags_guard(obj_klass, |
|
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|
4400 // Test both conditions: |
|
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|
4401 JVM_ACC_IS_CLONEABLE | JVM_ACC_HAS_FINALIZER, |
|
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|
4402 // Must be cloneable but not finalizer: |
|
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|
4403 JVM_ACC_IS_CLONEABLE, |
|
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|
4404 slow_region); |
|
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|
4405 } |
|
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6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
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|
4406 |
|
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|
4407 if (!stopped()) { |
|
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|
4408 // It's an instance, and it passed the slow-path tests. |
|
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|
4409 PreserveJVMState pjvms(this); |
|
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|
4410 Node* obj_size = NULL; |
|
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|
4411 Node* alloc_obj = new_instance(obj_klass, NULL, raw_mem_only, &obj_size); |
|
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|
4412 |
|
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|
4413 copy_to_clone(obj, alloc_obj, obj_size, false, !use_ReduceInitialCardMarks()); |
|
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|
4414 |
|
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|
4415 // Present the results of the slow call. |
|
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|
4416 result_reg->init_req(_instance_path, control()); |
|
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|
4417 result_val->init_req(_instance_path, alloc_obj); |
|
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|
4418 result_i_o ->set_req(_instance_path, i_o()); |
|
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|
4419 result_mem ->set_req(_instance_path, reset_memory()); |
| 0 | 4420 } |
| 4421 | |
|
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|
4422 // Generate code for the slow case. We make a call to clone(). |
|
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|
4423 set_control(_gvn.transform(slow_region)); |
|
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|
4424 if (!stopped()) { |
|
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|
4425 PreserveJVMState pjvms(this); |
|
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|
4426 CallJavaNode* slow_call = generate_method_call(vmIntrinsics::_clone, is_virtual); |
|
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|
4427 Node* slow_result = set_results_for_java_call(slow_call); |
|
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|
4428 // this->control() comes from set_results_for_java_call |
|
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|
4429 result_reg->init_req(_slow_path, control()); |
|
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|
4430 result_val->init_req(_slow_path, slow_result); |
|
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|
4431 result_i_o ->set_req(_slow_path, i_o()); |
|
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|
4432 result_mem ->set_req(_slow_path, reset_memory()); |
|
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|
4433 } |
|
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fc2281ddce3c
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|
4434 |
|
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|
4435 // Return the combined state. |
|
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|
4436 set_control( _gvn.transform(result_reg) ); |
|
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|
4437 set_i_o( _gvn.transform(result_i_o) ); |
|
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|
4438 set_all_memory( _gvn.transform(result_mem) ); |
|
900
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|
4439 } //original reexecute and sp are set back here |
| 0 | 4440 |
|
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|
4441 push(_gvn.transform(result_val)); |
| 0 | 4442 |
| 4443 return true; | |
| 4444 } | |
| 4445 | |
| 4446 //------------------------------basictype2arraycopy---------------------------- | |
| 4447 address LibraryCallKit::basictype2arraycopy(BasicType t, | |
| 4448 Node* src_offset, | |
| 4449 Node* dest_offset, | |
| 4450 bool disjoint_bases, | |
| 2324 | 4451 const char* &name, |
| 4452 bool dest_uninitialized) { | |
| 0 | 4453 const TypeInt* src_offset_inttype = gvn().find_int_type(src_offset);; |
| 4454 const TypeInt* dest_offset_inttype = gvn().find_int_type(dest_offset);; | |
| 4455 | |
| 4456 bool aligned = false; | |
| 4457 bool disjoint = disjoint_bases; | |
| 4458 | |
| 4459 // if the offsets are the same, we can treat the memory regions as | |
| 4460 // disjoint, because either the memory regions are in different arrays, | |
| 4461 // or they are identical (which we can treat as disjoint.) We can also | |
| 4462 // treat a copy with a destination index less that the source index | |
| 4463 // as disjoint since a low->high copy will work correctly in this case. | |
| 4464 if (src_offset_inttype != NULL && src_offset_inttype->is_con() && | |
| 4465 dest_offset_inttype != NULL && dest_offset_inttype->is_con()) { | |
| 4466 // both indices are constants | |
| 4467 int s_offs = src_offset_inttype->get_con(); | |
| 4468 int d_offs = dest_offset_inttype->get_con(); | |
|
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6633953: type2aelembytes{T_ADDRESS} should be 8 bytes in 64 bit VM
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diff
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|
4469 int element_size = type2aelembytes(t); |
| 0 | 4470 aligned = ((arrayOopDesc::base_offset_in_bytes(t) + s_offs * element_size) % HeapWordSize == 0) && |
| 4471 ((arrayOopDesc::base_offset_in_bytes(t) + d_offs * element_size) % HeapWordSize == 0); | |
| 4472 if (s_offs >= d_offs) disjoint = true; | |
| 4473 } else if (src_offset == dest_offset && src_offset != NULL) { | |
| 4474 // This can occur if the offsets are identical non-constants. | |
| 4475 disjoint = true; | |
| 4476 } | |
| 4477 | |
| 2446 | 4478 return StubRoutines::select_arraycopy_function(t, aligned, disjoint, name, dest_uninitialized); |
| 0 | 4479 } |
| 4480 | |
| 4481 | |
| 4482 //------------------------------inline_arraycopy----------------------- | |
| 4483 bool LibraryCallKit::inline_arraycopy() { | |
| 4484 // Restore the stack and pop off the arguments. | |
| 4485 int nargs = 5; // 2 oops, 3 ints, no size_t or long | |
| 4486 assert(callee()->signature()->size() == nargs, "copy has 5 arguments"); | |
| 4487 | |
| 4488 Node *src = argument(0); | |
| 4489 Node *src_offset = argument(1); | |
| 4490 Node *dest = argument(2); | |
| 4491 Node *dest_offset = argument(3); | |
| 4492 Node *length = argument(4); | |
| 4493 | |
| 4494 // Compile time checks. If any of these checks cannot be verified at compile time, | |
| 4495 // we do not make a fast path for this call. Instead, we let the call remain as it | |
| 4496 // is. The checks we choose to mandate at compile time are: | |
| 4497 // | |
| 4498 // (1) src and dest are arrays. | |
| 4499 const Type* src_type = src->Value(&_gvn); | |
| 4500 const Type* dest_type = dest->Value(&_gvn); | |
| 4501 const TypeAryPtr* top_src = src_type->isa_aryptr(); | |
| 4502 const TypeAryPtr* top_dest = dest_type->isa_aryptr(); | |
| 4503 if (top_src == NULL || top_src->klass() == NULL || | |
| 4504 top_dest == NULL || top_dest->klass() == NULL) { | |
| 4505 // Conservatively insert a memory barrier on all memory slices. | |
| 4506 // Do not let writes into the source float below the arraycopy. | |
| 4507 insert_mem_bar(Op_MemBarCPUOrder); | |
| 4508 | |
| 4509 // Call StubRoutines::generic_arraycopy stub. | |
| 4510 generate_arraycopy(TypeRawPtr::BOTTOM, T_CONFLICT, | |
|
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|
4511 src, src_offset, dest, dest_offset, length); |
| 0 | 4512 |
| 4513 // Do not let reads from the destination float above the arraycopy. | |
| 4514 // Since we cannot type the arrays, we don't know which slices | |
| 4515 // might be affected. We could restrict this barrier only to those | |
| 4516 // memory slices which pertain to array elements--but don't bother. | |
| 4517 if (!InsertMemBarAfterArraycopy) | |
| 4518 // (If InsertMemBarAfterArraycopy, there is already one in place.) | |
| 4519 insert_mem_bar(Op_MemBarCPUOrder); | |
| 4520 return true; | |
| 4521 } | |
| 4522 | |
| 4523 // (2) src and dest arrays must have elements of the same BasicType | |
| 4524 // Figure out the size and type of the elements we will be copying. | |
| 4525 BasicType src_elem = top_src->klass()->as_array_klass()->element_type()->basic_type(); | |
| 4526 BasicType dest_elem = top_dest->klass()->as_array_klass()->element_type()->basic_type(); | |
| 4527 if (src_elem == T_ARRAY) src_elem = T_OBJECT; | |
| 4528 if (dest_elem == T_ARRAY) dest_elem = T_OBJECT; | |
| 4529 | |
| 4530 if (src_elem != dest_elem || dest_elem == T_VOID) { | |
| 4531 // The component types are not the same or are not recognized. Punt. | |
| 4532 // (But, avoid the native method wrapper to JVM_ArrayCopy.) | |
| 4533 generate_slow_arraycopy(TypePtr::BOTTOM, | |
| 2324 | 4534 src, src_offset, dest, dest_offset, length, |
| 4535 /*dest_uninitialized*/false); | |
| 0 | 4536 return true; |
| 4537 } | |
| 4538 | |
| 4539 //--------------------------------------------------------------------------- | |
| 4540 // We will make a fast path for this call to arraycopy. | |
| 4541 | |
| 4542 // We have the following tests left to perform: | |
| 4543 // | |
| 4544 // (3) src and dest must not be null. | |
| 4545 // (4) src_offset must not be negative. | |
| 4546 // (5) dest_offset must not be negative. | |
| 4547 // (6) length must not be negative. | |
| 4548 // (7) src_offset + length must not exceed length of src. | |
| 4549 // (8) dest_offset + length must not exceed length of dest. | |
| 4550 // (9) each element of an oop array must be assignable | |
| 4551 | |
| 4552 RegionNode* slow_region = new (C, 1) RegionNode(1); | |
| 4553 record_for_igvn(slow_region); | |
| 4554 | |
| 4555 // (3) operands must not be null | |
| 4556 // We currently perform our null checks with the do_null_check routine. | |
| 4557 // This means that the null exceptions will be reported in the caller | |
| 4558 // rather than (correctly) reported inside of the native arraycopy call. | |
| 4559 // This should be corrected, given time. We do our null check with the | |
| 4560 // stack pointer restored. | |
| 4561 _sp += nargs; | |
| 4562 src = do_null_check(src, T_ARRAY); | |
| 4563 dest = do_null_check(dest, T_ARRAY); | |
| 4564 _sp -= nargs; | |
| 4565 | |
| 4566 // (4) src_offset must not be negative. | |
| 4567 generate_negative_guard(src_offset, slow_region); | |
| 4568 | |
| 4569 // (5) dest_offset must not be negative. | |
| 4570 generate_negative_guard(dest_offset, slow_region); | |
| 4571 | |
| 4572 // (6) length must not be negative (moved to generate_arraycopy()). | |
| 4573 // generate_negative_guard(length, slow_region); | |
| 4574 | |
| 4575 // (7) src_offset + length must not exceed length of src. | |
| 4576 generate_limit_guard(src_offset, length, | |
| 4577 load_array_length(src), | |
| 4578 slow_region); | |
| 4579 | |
| 4580 // (8) dest_offset + length must not exceed length of dest. | |
| 4581 generate_limit_guard(dest_offset, length, | |
| 4582 load_array_length(dest), | |
| 4583 slow_region); | |
| 4584 | |
| 4585 // (9) each element of an oop array must be assignable | |
| 4586 // The generate_arraycopy subroutine checks this. | |
| 4587 | |
| 4588 // This is where the memory effects are placed: | |
| 4589 const TypePtr* adr_type = TypeAryPtr::get_array_body_type(dest_elem); | |
| 4590 generate_arraycopy(adr_type, dest_elem, | |
| 4591 src, src_offset, dest, dest_offset, length, | |
|
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|
4592 false, false, slow_region); |
| 0 | 4593 |
| 4594 return true; | |
| 4595 } | |
| 4596 | |
| 4597 //-----------------------------generate_arraycopy---------------------- | |
| 4598 // Generate an optimized call to arraycopy. | |
| 4599 // Caller must guard against non-arrays. | |
| 4600 // Caller must determine a common array basic-type for both arrays. | |
| 4601 // Caller must validate offsets against array bounds. | |
| 4602 // The slow_region has already collected guard failure paths | |
| 4603 // (such as out of bounds length or non-conformable array types). | |
| 4604 // The generated code has this shape, in general: | |
| 4605 // | |
| 4606 // if (length == 0) return // via zero_path | |
| 4607 // slowval = -1 | |
| 4608 // if (types unknown) { | |
| 4609 // slowval = call generic copy loop | |
| 4610 // if (slowval == 0) return // via checked_path | |
| 4611 // } else if (indexes in bounds) { | |
| 4612 // if ((is object array) && !(array type check)) { | |
| 4613 // slowval = call checked copy loop | |
| 4614 // if (slowval == 0) return // via checked_path | |
| 4615 // } else { | |
| 4616 // call bulk copy loop | |
| 4617 // return // via fast_path | |
| 4618 // } | |
| 4619 // } | |
| 4620 // // adjust params for remaining work: | |
| 4621 // if (slowval != -1) { | |
| 4622 // n = -1^slowval; src_offset += n; dest_offset += n; length -= n | |
| 4623 // } | |
| 4624 // slow_region: | |
| 4625 // call slow arraycopy(src, src_offset, dest, dest_offset, length) | |
| 4626 // return // via slow_call_path | |
| 4627 // | |
| 4628 // This routine is used from several intrinsics: System.arraycopy, | |
| 4629 // Object.clone (the array subcase), and Arrays.copyOf[Range]. | |
| 4630 // | |
| 4631 void | |
| 4632 LibraryCallKit::generate_arraycopy(const TypePtr* adr_type, | |
| 4633 BasicType basic_elem_type, | |
| 4634 Node* src, Node* src_offset, | |
| 4635 Node* dest, Node* dest_offset, | |
| 4636 Node* copy_length, | |
| 4637 bool disjoint_bases, | |
| 4638 bool length_never_negative, | |
| 4639 RegionNode* slow_region) { | |
| 4640 | |
| 4641 if (slow_region == NULL) { | |
| 4642 slow_region = new(C,1) RegionNode(1); | |
| 4643 record_for_igvn(slow_region); | |
| 4644 } | |
| 4645 | |
| 4646 Node* original_dest = dest; | |
| 4647 AllocateArrayNode* alloc = NULL; // used for zeroing, if needed | |
| 2324 | 4648 bool dest_uninitialized = false; |
| 0 | 4649 |
| 4650 // See if this is the initialization of a newly-allocated array. | |
| 4651 // If so, we will take responsibility here for initializing it to zero. | |
| 4652 // (Note: Because tightly_coupled_allocation performs checks on the | |
| 4653 // out-edges of the dest, we need to avoid making derived pointers | |
| 4654 // from it until we have checked its uses.) | |
| 4655 if (ReduceBulkZeroing | |
| 4656 && !ZeroTLAB // pointless if already zeroed | |
| 4657 && basic_elem_type != T_CONFLICT // avoid corner case | |
| 4658 && !_gvn.eqv_uncast(src, dest) | |
| 4659 && ((alloc = tightly_coupled_allocation(dest, slow_region)) | |
| 4660 != NULL) | |
|
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|
4661 && _gvn.find_int_con(alloc->in(AllocateNode::ALength), 1) > 0 |
| 0 | 4662 && alloc->maybe_set_complete(&_gvn)) { |
| 4663 // "You break it, you buy it." | |
| 4664 InitializeNode* init = alloc->initialization(); | |
| 4665 assert(init->is_complete(), "we just did this"); | |
|
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changeset
|
4666 assert(dest->is_CheckCastPP(), "sanity"); |
| 0 | 4667 assert(dest->in(0)->in(0) == init, "dest pinned"); |
| 4668 adr_type = TypeRawPtr::BOTTOM; // all initializations are into raw memory | |
| 4669 // From this point on, every exit path is responsible for | |
| 4670 // initializing any non-copied parts of the object to zero. | |
| 2324 | 4671 // Also, if this flag is set we make sure that arraycopy interacts properly |
| 4672 // with G1, eliding pre-barriers. See CR 6627983. | |
| 4673 dest_uninitialized = true; | |
| 0 | 4674 } else { |
| 4675 // No zeroing elimination here. | |
| 4676 alloc = NULL; | |
| 4677 //original_dest = dest; | |
| 2324 | 4678 //dest_uninitialized = false; |
| 0 | 4679 } |
| 4680 | |
| 4681 // Results are placed here: | |
| 4682 enum { fast_path = 1, // normal void-returning assembly stub | |
| 4683 checked_path = 2, // special assembly stub with cleanup | |
| 4684 slow_call_path = 3, // something went wrong; call the VM | |
| 4685 zero_path = 4, // bypass when length of copy is zero | |
| 4686 bcopy_path = 5, // copy primitive array by 64-bit blocks | |
| 4687 PATH_LIMIT = 6 | |
| 4688 }; | |
| 4689 RegionNode* result_region = new(C, PATH_LIMIT) RegionNode(PATH_LIMIT); | |
| 4690 PhiNode* result_i_o = new(C, PATH_LIMIT) PhiNode(result_region, Type::ABIO); | |
| 4691 PhiNode* result_memory = new(C, PATH_LIMIT) PhiNode(result_region, Type::MEMORY, adr_type); | |
| 4692 record_for_igvn(result_region); | |
| 4693 _gvn.set_type_bottom(result_i_o); | |
| 4694 _gvn.set_type_bottom(result_memory); | |
| 4695 assert(adr_type != TypePtr::BOTTOM, "must be RawMem or a T[] slice"); | |
| 4696 | |
| 4697 // The slow_control path: | |
| 4698 Node* slow_control; | |
| 4699 Node* slow_i_o = i_o(); | |
| 4700 Node* slow_mem = memory(adr_type); | |
| 4701 debug_only(slow_control = (Node*) badAddress); | |
| 4702 | |
| 4703 // Checked control path: | |
| 4704 Node* checked_control = top(); | |
| 4705 Node* checked_mem = NULL; | |
| 4706 Node* checked_i_o = NULL; | |
| 4707 Node* checked_value = NULL; | |
| 4708 | |
| 4709 if (basic_elem_type == T_CONFLICT) { | |
| 2324 | 4710 assert(!dest_uninitialized, ""); |
| 0 | 4711 Node* cv = generate_generic_arraycopy(adr_type, |
| 4712 src, src_offset, dest, dest_offset, | |
| 2324 | 4713 copy_length, dest_uninitialized); |
| 0 | 4714 if (cv == NULL) cv = intcon(-1); // failure (no stub available) |
| 4715 checked_control = control(); | |
| 4716 checked_i_o = i_o(); | |
| 4717 checked_mem = memory(adr_type); | |
| 4718 checked_value = cv; | |
| 4719 set_control(top()); // no fast path | |
| 4720 } | |
| 4721 | |
| 4722 Node* not_pos = generate_nonpositive_guard(copy_length, length_never_negative); | |
| 4723 if (not_pos != NULL) { | |
| 4724 PreserveJVMState pjvms(this); | |
| 4725 set_control(not_pos); | |
| 4726 | |
| 4727 // (6) length must not be negative. | |
| 4728 if (!length_never_negative) { | |
| 4729 generate_negative_guard(copy_length, slow_region); | |
| 4730 } | |
| 4731 | |
|
836
4325cdaa78ad
6857661: 64-bit server VM: assert(is_Initialize(),"invalid node class")
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diff
changeset
|
4732 // copy_length is 0. |
| 2324 | 4733 if (!stopped() && dest_uninitialized) { |
| 0 | 4734 Node* dest_length = alloc->in(AllocateNode::ALength); |
| 4735 if (_gvn.eqv_uncast(copy_length, dest_length) | |
| 4736 || _gvn.find_int_con(dest_length, 1) <= 0) { | |
|
836
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6857661: 64-bit server VM: assert(is_Initialize(),"invalid node class")
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diff
changeset
|
4737 // There is no zeroing to do. No need for a secondary raw memory barrier. |
| 0 | 4738 } else { |
| 4739 // Clear the whole thing since there are no source elements to copy. | |
| 4740 generate_clear_array(adr_type, dest, basic_elem_type, | |
| 4741 intcon(0), NULL, | |
| 4742 alloc->in(AllocateNode::AllocSize)); | |
|
836
4325cdaa78ad
6857661: 64-bit server VM: assert(is_Initialize(),"invalid node class")
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diff
changeset
|
4743 // Use a secondary InitializeNode as raw memory barrier. |
|
4325cdaa78ad
6857661: 64-bit server VM: assert(is_Initialize(),"invalid node class")
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diff
changeset
|
4744 // Currently it is needed only on this path since other |
|
4325cdaa78ad
6857661: 64-bit server VM: assert(is_Initialize(),"invalid node class")
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diff
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|
4745 // paths have stub or runtime calls as raw memory barriers. |
|
4325cdaa78ad
6857661: 64-bit server VM: assert(is_Initialize(),"invalid node class")
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diff
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|
4746 InitializeNode* init = insert_mem_bar_volatile(Op_Initialize, |
|
4325cdaa78ad
6857661: 64-bit server VM: assert(is_Initialize(),"invalid node class")
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|
4747 Compile::AliasIdxRaw, |
|
4325cdaa78ad
6857661: 64-bit server VM: assert(is_Initialize(),"invalid node class")
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changeset
|
4748 top())->as_Initialize(); |
|
4325cdaa78ad
6857661: 64-bit server VM: assert(is_Initialize(),"invalid node class")
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diff
changeset
|
4749 init->set_complete(&_gvn); // (there is no corresponding AllocateNode) |
| 0 | 4750 } |
| 4751 } | |
| 4752 | |
| 4753 // Present the results of the fast call. | |
| 4754 result_region->init_req(zero_path, control()); | |
| 4755 result_i_o ->init_req(zero_path, i_o()); | |
| 4756 result_memory->init_req(zero_path, memory(adr_type)); | |
| 4757 } | |
| 4758 | |
| 2324 | 4759 if (!stopped() && dest_uninitialized) { |
| 0 | 4760 // We have to initialize the *uncopied* part of the array to zero. |
| 4761 // The copy destination is the slice dest[off..off+len]. The other slices | |
| 4762 // are dest_head = dest[0..off] and dest_tail = dest[off+len..dest.length]. | |
| 4763 Node* dest_size = alloc->in(AllocateNode::AllocSize); | |
| 4764 Node* dest_length = alloc->in(AllocateNode::ALength); | |
| 4765 Node* dest_tail = _gvn.transform( new(C,3) AddINode(dest_offset, | |
| 4766 copy_length) ); | |
| 4767 | |
| 4768 // If there is a head section that needs zeroing, do it now. | |
| 4769 if (find_int_con(dest_offset, -1) != 0) { | |
| 4770 generate_clear_array(adr_type, dest, basic_elem_type, | |
| 4771 intcon(0), dest_offset, | |
| 4772 NULL); | |
| 4773 } | |
| 4774 | |
| 4775 // Next, perform a dynamic check on the tail length. | |
| 4776 // It is often zero, and we can win big if we prove this. | |
| 4777 // There are two wins: Avoid generating the ClearArray | |
| 4778 // with its attendant messy index arithmetic, and upgrade | |
| 4779 // the copy to a more hardware-friendly word size of 64 bits. | |
| 4780 Node* tail_ctl = NULL; | |
| 4781 if (!stopped() && !_gvn.eqv_uncast(dest_tail, dest_length)) { | |
| 4782 Node* cmp_lt = _gvn.transform( new(C,3) CmpINode(dest_tail, dest_length) ); | |
| 4783 Node* bol_lt = _gvn.transform( new(C,2) BoolNode(cmp_lt, BoolTest::lt) ); | |
| 4784 tail_ctl = generate_slow_guard(bol_lt, NULL); | |
| 4785 assert(tail_ctl != NULL || !stopped(), "must be an outcome"); | |
| 4786 } | |
| 4787 | |
| 4788 // At this point, let's assume there is no tail. | |
| 4789 if (!stopped() && alloc != NULL && basic_elem_type != T_OBJECT) { | |
| 4790 // There is no tail. Try an upgrade to a 64-bit copy. | |
| 4791 bool didit = false; | |
| 4792 { PreserveJVMState pjvms(this); | |
| 4793 didit = generate_block_arraycopy(adr_type, basic_elem_type, alloc, | |
| 4794 src, src_offset, dest, dest_offset, | |
| 2324 | 4795 dest_size, dest_uninitialized); |
| 0 | 4796 if (didit) { |
| 4797 // Present the results of the block-copying fast call. | |
| 4798 result_region->init_req(bcopy_path, control()); | |
| 4799 result_i_o ->init_req(bcopy_path, i_o()); | |
| 4800 result_memory->init_req(bcopy_path, memory(adr_type)); | |
| 4801 } | |
| 4802 } | |
| 4803 if (didit) | |
| 4804 set_control(top()); // no regular fast path | |
| 4805 } | |
| 4806 | |
| 4807 // Clear the tail, if any. | |
| 4808 if (tail_ctl != NULL) { | |
| 4809 Node* notail_ctl = stopped() ? NULL : control(); | |
| 4810 set_control(tail_ctl); | |
| 4811 if (notail_ctl == NULL) { | |
| 4812 generate_clear_array(adr_type, dest, basic_elem_type, | |
| 4813 dest_tail, NULL, | |
| 4814 dest_size); | |
| 4815 } else { | |
| 4816 // Make a local merge. | |
| 4817 Node* done_ctl = new(C,3) RegionNode(3); | |
| 4818 Node* done_mem = new(C,3) PhiNode(done_ctl, Type::MEMORY, adr_type); | |
| 4819 done_ctl->init_req(1, notail_ctl); | |
| 4820 done_mem->init_req(1, memory(adr_type)); | |
| 4821 generate_clear_array(adr_type, dest, basic_elem_type, | |
| 4822 dest_tail, NULL, | |
| 4823 dest_size); | |
| 4824 done_ctl->init_req(2, control()); | |
| 4825 done_mem->init_req(2, memory(adr_type)); | |
| 4826 set_control( _gvn.transform(done_ctl) ); | |
| 4827 set_memory( _gvn.transform(done_mem), adr_type ); | |
| 4828 } | |
| 4829 } | |
| 4830 } | |
| 4831 | |
| 4832 BasicType copy_type = basic_elem_type; | |
| 4833 assert(basic_elem_type != T_ARRAY, "caller must fix this"); | |
| 4834 if (!stopped() && copy_type == T_OBJECT) { | |
| 4835 // If src and dest have compatible element types, we can copy bits. | |
| 4836 // Types S[] and D[] are compatible if D is a supertype of S. | |
| 4837 // | |
| 4838 // If they are not, we will use checked_oop_disjoint_arraycopy, | |
| 4839 // which performs a fast optimistic per-oop check, and backs off | |
| 4840 // further to JVM_ArrayCopy on the first per-oop check that fails. | |
| 4841 // (Actually, we don't move raw bits only; the GC requires card marks.) | |
| 4842 | |
| 4843 // Get the klassOop for both src and dest | |
| 4844 Node* src_klass = load_object_klass(src); | |
| 4845 Node* dest_klass = load_object_klass(dest); | |
| 4846 | |
| 4847 // Generate the subtype check. | |
| 4848 // This might fold up statically, or then again it might not. | |
| 4849 // | |
| 4850 // Non-static example: Copying List<String>.elements to a new String[]. | |
| 4851 // The backing store for a List<String> is always an Object[], | |
| 4852 // but its elements are always type String, if the generic types | |
| 4853 // are correct at the source level. | |
| 4854 // | |
| 4855 // Test S[] against D[], not S against D, because (probably) | |
| 4856 // the secondary supertype cache is less busy for S[] than S. | |
| 4857 // This usually only matters when D is an interface. | |
| 4858 Node* not_subtype_ctrl = gen_subtype_check(src_klass, dest_klass); | |
| 4859 // Plug failing path into checked_oop_disjoint_arraycopy | |
| 4860 if (not_subtype_ctrl != top()) { | |
| 4861 PreserveJVMState pjvms(this); | |
| 4862 set_control(not_subtype_ctrl); | |
| 4863 // (At this point we can assume disjoint_bases, since types differ.) | |
| 4864 int ek_offset = objArrayKlass::element_klass_offset_in_bytes() + sizeof(oopDesc); | |
| 4865 Node* p1 = basic_plus_adr(dest_klass, ek_offset); | |
|
164
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163
diff
changeset
|
4866 Node* n1 = LoadKlassNode::make(_gvn, immutable_memory(), p1, TypeRawPtr::BOTTOM); |
| 0 | 4867 Node* dest_elem_klass = _gvn.transform(n1); |
| 4868 Node* cv = generate_checkcast_arraycopy(adr_type, | |
| 4869 dest_elem_klass, | |
| 4870 src, src_offset, dest, dest_offset, | |
| 2324 | 4871 ConvI2X(copy_length), dest_uninitialized); |
| 0 | 4872 if (cv == NULL) cv = intcon(-1); // failure (no stub available) |
| 4873 checked_control = control(); | |
| 4874 checked_i_o = i_o(); | |
| 4875 checked_mem = memory(adr_type); | |
| 4876 checked_value = cv; | |
| 4877 } | |
| 4878 // At this point we know we do not need type checks on oop stores. | |
| 4879 | |
| 4880 // Let's see if we need card marks: | |
| 4881 if (alloc != NULL && use_ReduceInitialCardMarks()) { | |
| 4882 // If we do not need card marks, copy using the jint or jlong stub. | |
|
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34
diff
changeset
|
4883 copy_type = LP64_ONLY(UseCompressedOops ? T_INT : T_LONG) NOT_LP64(T_INT); |
|
29
d5fc211aea19
6633953: type2aelembytes{T_ADDRESS} should be 8 bytes in 64 bit VM
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0
diff
changeset
|
4884 assert(type2aelembytes(basic_elem_type) == type2aelembytes(copy_type), |
| 0 | 4885 "sizes agree"); |
| 4886 } | |
| 4887 } | |
| 4888 | |
| 4889 if (!stopped()) { | |
| 4890 // Generate the fast path, if possible. | |
| 4891 PreserveJVMState pjvms(this); | |
| 4892 generate_unchecked_arraycopy(adr_type, copy_type, disjoint_bases, | |
| 4893 src, src_offset, dest, dest_offset, | |
| 2324 | 4894 ConvI2X(copy_length), dest_uninitialized); |
| 0 | 4895 |
| 4896 // Present the results of the fast call. | |
| 4897 result_region->init_req(fast_path, control()); | |
| 4898 result_i_o ->init_req(fast_path, i_o()); | |
| 4899 result_memory->init_req(fast_path, memory(adr_type)); | |
| 4900 } | |
| 4901 | |
| 4902 // Here are all the slow paths up to this point, in one bundle: | |
| 4903 slow_control = top(); | |
| 4904 if (slow_region != NULL) | |
| 4905 slow_control = _gvn.transform(slow_region); | |
| 4906 debug_only(slow_region = (RegionNode*)badAddress); | |
| 4907 | |
| 4908 set_control(checked_control); | |
| 4909 if (!stopped()) { | |
| 4910 // Clean up after the checked call. | |
| 4911 // The returned value is either 0 or -1^K, | |
| 4912 // where K = number of partially transferred array elements. | |
| 4913 Node* cmp = _gvn.transform( new(C, 3) CmpINode(checked_value, intcon(0)) ); | |
| 4914 Node* bol = _gvn.transform( new(C, 2) BoolNode(cmp, BoolTest::eq) ); | |
| 4915 IfNode* iff = create_and_map_if(control(), bol, PROB_MAX, COUNT_UNKNOWN); | |
| 4916 | |
| 4917 // If it is 0, we are done, so transfer to the end. | |
| 4918 Node* checks_done = _gvn.transform( new(C, 1) IfTrueNode(iff) ); | |
| 4919 result_region->init_req(checked_path, checks_done); | |
| 4920 result_i_o ->init_req(checked_path, checked_i_o); | |
| 4921 result_memory->init_req(checked_path, checked_mem); | |
| 4922 | |
| 4923 // If it is not zero, merge into the slow call. | |
| 4924 set_control( _gvn.transform( new(C, 1) IfFalseNode(iff) )); | |
| 4925 RegionNode* slow_reg2 = new(C, 3) RegionNode(3); | |
| 4926 PhiNode* slow_i_o2 = new(C, 3) PhiNode(slow_reg2, Type::ABIO); | |
| 4927 PhiNode* slow_mem2 = new(C, 3) PhiNode(slow_reg2, Type::MEMORY, adr_type); | |
| 4928 record_for_igvn(slow_reg2); | |
| 4929 slow_reg2 ->init_req(1, slow_control); | |
| 4930 slow_i_o2 ->init_req(1, slow_i_o); | |
| 4931 slow_mem2 ->init_req(1, slow_mem); | |
| 4932 slow_reg2 ->init_req(2, control()); | |
|
833
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6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
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827
diff
changeset
|
4933 slow_i_o2 ->init_req(2, checked_i_o); |
|
acba6af809c8
6840775: Multiple JVM crashes seen with 1.6.0_10 through 1.6.0_14
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827
diff
changeset
|
4934 slow_mem2 ->init_req(2, checked_mem); |
| 0 | 4935 |
| 4936 slow_control = _gvn.transform(slow_reg2); | |
| 4937 slow_i_o = _gvn.transform(slow_i_o2); | |
| 4938 slow_mem = _gvn.transform(slow_mem2); | |
| 4939 | |
| 4940 if (alloc != NULL) { | |
| 4941 // We'll restart from the very beginning, after zeroing the whole thing. | |
| 4942 // This can cause double writes, but that's OK since dest is brand new. | |
| 4943 // So we ignore the low 31 bits of the value returned from the stub. | |
| 4944 } else { | |
| 4945 // We must continue the copy exactly where it failed, or else | |
| 4946 // another thread might see the wrong number of writes to dest. | |
| 4947 Node* checked_offset = _gvn.transform( new(C, 3) XorINode(checked_value, intcon(-1)) ); | |
| 4948 Node* slow_offset = new(C, 3) PhiNode(slow_reg2, TypeInt::INT); | |
| 4949 slow_offset->init_req(1, intcon(0)); | |
| 4950 slow_offset->init_req(2, checked_offset); | |
| 4951 slow_offset = _gvn.transform(slow_offset); | |
| 4952 | |
| 4953 // Adjust the arguments by the conditionally incoming offset. | |
| 4954 Node* src_off_plus = _gvn.transform( new(C, 3) AddINode(src_offset, slow_offset) ); | |
| 4955 Node* dest_off_plus = _gvn.transform( new(C, 3) AddINode(dest_offset, slow_offset) ); | |
| 4956 Node* length_minus = _gvn.transform( new(C, 3) SubINode(copy_length, slow_offset) ); | |
| 4957 | |
| 4958 // Tweak the node variables to adjust the code produced below: | |
| 4959 src_offset = src_off_plus; | |
| 4960 dest_offset = dest_off_plus; | |
| 4961 copy_length = length_minus; | |
| 4962 } | |
| 4963 } | |
| 4964 | |
| 4965 set_control(slow_control); | |
| 4966 if (!stopped()) { | |
| 4967 // Generate the slow path, if needed. | |
| 4968 PreserveJVMState pjvms(this); // replace_in_map may trash the map | |
| 4969 | |
| 4970 set_memory(slow_mem, adr_type); | |
| 4971 set_i_o(slow_i_o); | |
| 4972 | |
| 2324 | 4973 if (dest_uninitialized) { |
| 0 | 4974 generate_clear_array(adr_type, dest, basic_elem_type, |
| 4975 intcon(0), NULL, | |
| 4976 alloc->in(AllocateNode::AllocSize)); | |
| 4977 } | |
| 4978 | |
| 4979 generate_slow_arraycopy(adr_type, | |
| 4980 src, src_offset, dest, dest_offset, | |
| 2324 | 4981 copy_length, /*dest_uninitialized*/false); |
| 0 | 4982 |
| 4983 result_region->init_req(slow_call_path, control()); | |
| 4984 result_i_o ->init_req(slow_call_path, i_o()); | |
| 4985 result_memory->init_req(slow_call_path, memory(adr_type)); | |
| 4986 } | |
| 4987 | |
| 4988 // Remove unused edges. | |
| 4989 for (uint i = 1; i < result_region->req(); i++) { | |
| 4990 if (result_region->in(i) == NULL) | |
| 4991 result_region->init_req(i, top()); | |
| 4992 } | |
| 4993 | |
| 4994 // Finished; return the combined state. | |
| 4995 set_control( _gvn.transform(result_region) ); | |
| 4996 set_i_o( _gvn.transform(result_i_o) ); | |
| 4997 set_memory( _gvn.transform(result_memory), adr_type ); | |
| 4998 | |
| 4999 // The memory edges above are precise in order to model effects around | |
| 605 | 5000 // array copies accurately to allow value numbering of field loads around |
| 0 | 5001 // arraycopy. Such field loads, both before and after, are common in Java |
| 5002 // collections and similar classes involving header/array data structures. | |
| 5003 // | |
| 5004 // But with low number of register or when some registers are used or killed | |
| 5005 // by arraycopy calls it causes registers spilling on stack. See 6544710. | |
| 5006 // The next memory barrier is added to avoid it. If the arraycopy can be | |
| 5007 // optimized away (which it can, sometimes) then we can manually remove | |
| 5008 // the membar also. | |
|
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parents:
950
diff
changeset
|
5009 // |
|
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6880053: assert(alloc_obj->as_CheckCastPP()->type() != TypeInstPtr::NOTNULL)
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950
diff
changeset
|
5010 // Do not let reads from the cloned object float above the arraycopy. |
|
c7e94e8fff43
6880053: assert(alloc_obj->as_CheckCastPP()->type() != TypeInstPtr::NOTNULL)
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950
diff
changeset
|
5011 if (InsertMemBarAfterArraycopy || alloc != NULL) |
| 0 | 5012 insert_mem_bar(Op_MemBarCPUOrder); |
| 5013 } | |
| 5014 | |
| 5015 | |
| 5016 // Helper function which determines if an arraycopy immediately follows | |
| 5017 // an allocation, with no intervening tests or other escapes for the object. | |
| 5018 AllocateArrayNode* | |
| 5019 LibraryCallKit::tightly_coupled_allocation(Node* ptr, | |
| 5020 RegionNode* slow_region) { | |
| 5021 if (stopped()) return NULL; // no fast path | |
| 5022 if (C->AliasLevel() == 0) return NULL; // no MergeMems around | |
| 5023 | |
| 5024 AllocateArrayNode* alloc = AllocateArrayNode::Ideal_array_allocation(ptr, &_gvn); | |
| 5025 if (alloc == NULL) return NULL; | |
| 5026 | |
| 5027 Node* rawmem = memory(Compile::AliasIdxRaw); | |
| 5028 // Is the allocation's memory state untouched? | |
| 5029 if (!(rawmem->is_Proj() && rawmem->in(0)->is_Initialize())) { | |
| 5030 // Bail out if there have been raw-memory effects since the allocation. | |
| 5031 // (Example: There might have been a call or safepoint.) | |
| 5032 return NULL; | |
| 5033 } | |
| 5034 rawmem = rawmem->in(0)->as_Initialize()->memory(Compile::AliasIdxRaw); | |
| 5035 if (!(rawmem->is_Proj() && rawmem->in(0) == alloc)) { | |
| 5036 return NULL; | |
| 5037 } | |
| 5038 | |
| 5039 // There must be no unexpected observers of this allocation. | |
| 5040 for (DUIterator_Fast imax, i = ptr->fast_outs(imax); i < imax; i++) { | |
| 5041 Node* obs = ptr->fast_out(i); | |
| 5042 if (obs != this->map()) { | |
| 5043 return NULL; | |
| 5044 } | |
| 5045 } | |
| 5046 | |
| 5047 // This arraycopy must unconditionally follow the allocation of the ptr. | |
| 5048 Node* alloc_ctl = ptr->in(0); | |
| 5049 assert(just_allocated_object(alloc_ctl) == ptr, "most recent allo"); | |
| 5050 | |
| 5051 Node* ctl = control(); | |
| 5052 while (ctl != alloc_ctl) { | |
| 5053 // There may be guards which feed into the slow_region. | |
| 5054 // Any other control flow means that we might not get a chance | |
| 5055 // to finish initializing the allocated object. | |
| 5056 if ((ctl->is_IfFalse() || ctl->is_IfTrue()) && ctl->in(0)->is_If()) { | |
| 5057 IfNode* iff = ctl->in(0)->as_If(); | |
| 5058 Node* not_ctl = iff->proj_out(1 - ctl->as_Proj()->_con); | |
| 5059 assert(not_ctl != NULL && not_ctl != ctl, "found alternate"); | |
| 5060 if (slow_region != NULL && slow_region->find_edge(not_ctl) >= 1) { | |
| 5061 ctl = iff->in(0); // This test feeds the known slow_region. | |
| 5062 continue; | |
| 5063 } | |
| 5064 // One more try: Various low-level checks bottom out in | |
| 5065 // uncommon traps. If the debug-info of the trap omits | |
| 5066 // any reference to the allocation, as we've already | |
| 5067 // observed, then there can be no objection to the trap. | |
| 5068 bool found_trap = false; | |
| 5069 for (DUIterator_Fast jmax, j = not_ctl->fast_outs(jmax); j < jmax; j++) { | |
| 5070 Node* obs = not_ctl->fast_out(j); | |
| 5071 if (obs->in(0) == not_ctl && obs->is_Call() && | |
| 1748 | 5072 (obs->as_Call()->entry_point() == SharedRuntime::uncommon_trap_blob()->entry_point())) { |
| 0 | 5073 found_trap = true; break; |
| 5074 } | |
| 5075 } | |
| 5076 if (found_trap) { | |
| 5077 ctl = iff->in(0); // This test feeds a harmless uncommon trap. | |
| 5078 continue; | |
| 5079 } | |
| 5080 } | |
| 5081 return NULL; | |
| 5082 } | |
| 5083 | |
| 5084 // If we get this far, we have an allocation which immediately | |
| 5085 // precedes the arraycopy, and we can take over zeroing the new object. | |
| 5086 // The arraycopy will finish the initialization, and provide | |
| 5087 // a new control state to which we will anchor the destination pointer. | |
| 5088 | |
| 5089 return alloc; | |
| 5090 } | |
| 5091 | |
| 5092 // Helper for initialization of arrays, creating a ClearArray. | |
| 5093 // It writes zero bits in [start..end), within the body of an array object. | |
| 5094 // The memory effects are all chained onto the 'adr_type' alias category. | |
| 5095 // | |
| 5096 // Since the object is otherwise uninitialized, we are free | |
| 5097 // to put a little "slop" around the edges of the cleared area, | |
| 5098 // as long as it does not go back into the array's header, | |
| 5099 // or beyond the array end within the heap. | |
| 5100 // | |
| 5101 // The lower edge can be rounded down to the nearest jint and the | |
| 5102 // upper edge can be rounded up to the nearest MinObjAlignmentInBytes. | |
| 5103 // | |
| 5104 // Arguments: | |
| 5105 // adr_type memory slice where writes are generated | |
| 5106 // dest oop of the destination array | |
| 5107 // basic_elem_type element type of the destination | |
| 5108 // slice_idx array index of first element to store | |
| 5109 // slice_len number of elements to store (or NULL) | |
| 5110 // dest_size total size in bytes of the array object | |
| 5111 // | |
| 5112 // Exactly one of slice_len or dest_size must be non-NULL. | |
| 5113 // If dest_size is non-NULL, zeroing extends to the end of the object. | |
| 5114 // If slice_len is non-NULL, the slice_idx value must be a constant. | |
| 5115 void | |
| 5116 LibraryCallKit::generate_clear_array(const TypePtr* adr_type, | |
| 5117 Node* dest, | |
| 5118 BasicType basic_elem_type, | |
| 5119 Node* slice_idx, | |
| 5120 Node* slice_len, | |
| 5121 Node* dest_size) { | |
| 5122 // one or the other but not both of slice_len and dest_size: | |
| 5123 assert((slice_len != NULL? 1: 0) + (dest_size != NULL? 1: 0) == 1, ""); | |
| 5124 if (slice_len == NULL) slice_len = top(); | |
| 5125 if (dest_size == NULL) dest_size = top(); | |
| 5126 | |
| 5127 // operate on this memory slice: | |
| 5128 Node* mem = memory(adr_type); // memory slice to operate on | |
| 5129 | |
| 5130 // scaling and rounding of indexes: | |
|
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5131 int scale = exact_log2(type2aelembytes(basic_elem_type)); |
| 0 | 5132 int abase = arrayOopDesc::base_offset_in_bytes(basic_elem_type); |
| 5133 int clear_low = (-1 << scale) & (BytesPerInt - 1); | |
| 5134 int bump_bit = (-1 << scale) & BytesPerInt; | |
| 5135 | |
| 5136 // determine constant starts and ends | |
| 5137 const intptr_t BIG_NEG = -128; | |
| 5138 assert(BIG_NEG + 2*abase < 0, "neg enough"); | |
| 5139 intptr_t slice_idx_con = (intptr_t) find_int_con(slice_idx, BIG_NEG); | |
| 5140 intptr_t slice_len_con = (intptr_t) find_int_con(slice_len, BIG_NEG); | |
| 5141 if (slice_len_con == 0) { | |
| 5142 return; // nothing to do here | |
| 5143 } | |
| 5144 intptr_t start_con = (abase + (slice_idx_con << scale)) & ~clear_low; | |
| 5145 intptr_t end_con = find_intptr_t_con(dest_size, -1); | |
| 5146 if (slice_idx_con >= 0 && slice_len_con >= 0) { | |
| 5147 assert(end_con < 0, "not two cons"); | |
| 5148 end_con = round_to(abase + ((slice_idx_con + slice_len_con) << scale), | |
| 5149 BytesPerLong); | |
| 5150 } | |
| 5151 | |
| 5152 if (start_con >= 0 && end_con >= 0) { | |
| 5153 // Constant start and end. Simple. | |
| 5154 mem = ClearArrayNode::clear_memory(control(), mem, dest, | |
| 5155 start_con, end_con, &_gvn); | |
| 5156 } else if (start_con >= 0 && dest_size != top()) { | |
| 5157 // Constant start, pre-rounded end after the tail of the array. | |
| 5158 Node* end = dest_size; | |
| 5159 mem = ClearArrayNode::clear_memory(control(), mem, dest, | |
| 5160 start_con, end, &_gvn); | |
| 5161 } else if (start_con >= 0 && slice_len != top()) { | |
| 5162 // Constant start, non-constant end. End needs rounding up. | |
| 5163 // End offset = round_up(abase + ((slice_idx_con + slice_len) << scale), 8) | |
| 5164 intptr_t end_base = abase + (slice_idx_con << scale); | |
| 5165 int end_round = (-1 << scale) & (BytesPerLong - 1); | |
| 5166 Node* end = ConvI2X(slice_len); | |
| 5167 if (scale != 0) | |
| 5168 end = _gvn.transform( new(C,3) LShiftXNode(end, intcon(scale) )); | |
| 5169 end_base += end_round; | |
| 5170 end = _gvn.transform( new(C,3) AddXNode(end, MakeConX(end_base)) ); | |
| 5171 end = _gvn.transform( new(C,3) AndXNode(end, MakeConX(~end_round)) ); | |
| 5172 mem = ClearArrayNode::clear_memory(control(), mem, dest, | |
| 5173 start_con, end, &_gvn); | |
| 5174 } else if (start_con < 0 && dest_size != top()) { | |
| 5175 // Non-constant start, pre-rounded end after the tail of the array. | |
| 5176 // This is almost certainly a "round-to-end" operation. | |
| 5177 Node* start = slice_idx; | |
| 5178 start = ConvI2X(start); | |
| 5179 if (scale != 0) | |
| 5180 start = _gvn.transform( new(C,3) LShiftXNode( start, intcon(scale) )); | |
| 5181 start = _gvn.transform( new(C,3) AddXNode(start, MakeConX(abase)) ); | |
| 5182 if ((bump_bit | clear_low) != 0) { | |
| 5183 int to_clear = (bump_bit | clear_low); | |
| 5184 // Align up mod 8, then store a jint zero unconditionally | |
| 5185 // just before the mod-8 boundary. | |
|
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5186 if (((abase + bump_bit) & ~to_clear) - bump_bit |
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5187 < arrayOopDesc::length_offset_in_bytes() + BytesPerInt) { |
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5188 bump_bit = 0; |
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5189 assert((abase & to_clear) == 0, "array base must be long-aligned"); |
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5190 } else { |
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5191 // Bump 'start' up to (or past) the next jint boundary: |
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5192 start = _gvn.transform( new(C,3) AddXNode(start, MakeConX(bump_bit)) ); |
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5193 assert((abase & clear_low) == 0, "array base must be int-aligned"); |
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|
5194 } |
| 0 | 5195 // Round bumped 'start' down to jlong boundary in body of array. |
| 5196 start = _gvn.transform( new(C,3) AndXNode(start, MakeConX(~to_clear)) ); | |
|
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5197 if (bump_bit != 0) { |
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5198 // Store a zero to the immediately preceding jint: |
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5199 Node* x1 = _gvn.transform( new(C,3) AddXNode(start, MakeConX(-bump_bit)) ); |
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5200 Node* p1 = basic_plus_adr(dest, x1); |
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5201 mem = StoreNode::make(_gvn, control(), mem, p1, adr_type, intcon(0), T_INT); |
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5202 mem = _gvn.transform(mem); |
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|
5203 } |
| 0 | 5204 } |
| 5205 Node* end = dest_size; // pre-rounded | |
| 5206 mem = ClearArrayNode::clear_memory(control(), mem, dest, | |
| 5207 start, end, &_gvn); | |
| 5208 } else { | |
| 5209 // Non-constant start, unrounded non-constant end. | |
| 5210 // (Nobody zeroes a random midsection of an array using this routine.) | |
| 5211 ShouldNotReachHere(); // fix caller | |
| 5212 } | |
| 5213 | |
| 5214 // Done. | |
| 5215 set_memory(mem, adr_type); | |
| 5216 } | |
| 5217 | |
| 5218 | |
| 5219 bool | |
| 5220 LibraryCallKit::generate_block_arraycopy(const TypePtr* adr_type, | |
| 5221 BasicType basic_elem_type, | |
| 5222 AllocateNode* alloc, | |
| 5223 Node* src, Node* src_offset, | |
| 5224 Node* dest, Node* dest_offset, | |
| 2324 | 5225 Node* dest_size, bool dest_uninitialized) { |
| 0 | 5226 // See if there is an advantage from block transfer. |
|
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|
5227 int scale = exact_log2(type2aelembytes(basic_elem_type)); |
| 0 | 5228 if (scale >= LogBytesPerLong) |
| 5229 return false; // it is already a block transfer | |
| 5230 | |
| 5231 // Look at the alignment of the starting offsets. | |
| 5232 int abase = arrayOopDesc::base_offset_in_bytes(basic_elem_type); | |
| 5233 const intptr_t BIG_NEG = -128; | |
| 5234 assert(BIG_NEG + 2*abase < 0, "neg enough"); | |
| 5235 | |
| 5236 intptr_t src_off = abase + ((intptr_t) find_int_con(src_offset, -1) << scale); | |
| 5237 intptr_t dest_off = abase + ((intptr_t) find_int_con(dest_offset, -1) << scale); | |
| 5238 if (src_off < 0 || dest_off < 0) | |
| 5239 // At present, we can only understand constants. | |
| 5240 return false; | |
| 5241 | |
| 5242 if (((src_off | dest_off) & (BytesPerLong-1)) != 0) { | |
| 5243 // Non-aligned; too bad. | |
| 5244 // One more chance: Pick off an initial 32-bit word. | |
| 5245 // This is a common case, since abase can be odd mod 8. | |
| 5246 if (((src_off | dest_off) & (BytesPerLong-1)) == BytesPerInt && | |
| 5247 ((src_off ^ dest_off) & (BytesPerLong-1)) == 0) { | |
| 5248 Node* sptr = basic_plus_adr(src, src_off); | |
| 5249 Node* dptr = basic_plus_adr(dest, dest_off); | |
| 5250 Node* sval = make_load(control(), sptr, TypeInt::INT, T_INT, adr_type); | |
| 5251 store_to_memory(control(), dptr, sval, T_INT, adr_type); | |
| 5252 src_off += BytesPerInt; | |
| 5253 dest_off += BytesPerInt; | |
| 5254 } else { | |
| 5255 return false; | |
| 5256 } | |
| 5257 } | |
| 5258 assert(src_off % BytesPerLong == 0, ""); | |
| 5259 assert(dest_off % BytesPerLong == 0, ""); | |
| 5260 | |
| 5261 // Do this copy by giant steps. | |
| 5262 Node* sptr = basic_plus_adr(src, src_off); | |
| 5263 Node* dptr = basic_plus_adr(dest, dest_off); | |
| 5264 Node* countx = dest_size; | |
| 5265 countx = _gvn.transform( new (C, 3) SubXNode(countx, MakeConX(dest_off)) ); | |
| 5266 countx = _gvn.transform( new (C, 3) URShiftXNode(countx, intcon(LogBytesPerLong)) ); | |
| 5267 | |
| 5268 bool disjoint_bases = true; // since alloc != NULL | |
| 5269 generate_unchecked_arraycopy(adr_type, T_LONG, disjoint_bases, | |
| 2324 | 5270 sptr, NULL, dptr, NULL, countx, dest_uninitialized); |
| 0 | 5271 |
| 5272 return true; | |
| 5273 } | |
| 5274 | |
| 5275 | |
| 5276 // Helper function; generates code for the slow case. | |
| 5277 // We make a call to a runtime method which emulates the native method, | |
| 5278 // but without the native wrapper overhead. | |
| 5279 void | |
| 5280 LibraryCallKit::generate_slow_arraycopy(const TypePtr* adr_type, | |
| 5281 Node* src, Node* src_offset, | |
| 5282 Node* dest, Node* dest_offset, | |
| 2324 | 5283 Node* copy_length, bool dest_uninitialized) { |
| 5284 assert(!dest_uninitialized, "Invariant"); | |
| 0 | 5285 Node* call = make_runtime_call(RC_NO_LEAF | RC_UNCOMMON, |
| 5286 OptoRuntime::slow_arraycopy_Type(), | |
| 5287 OptoRuntime::slow_arraycopy_Java(), | |
| 5288 "slow_arraycopy", adr_type, | |
| 5289 src, src_offset, dest, dest_offset, | |
| 5290 copy_length); | |
| 5291 | |
| 5292 // Handle exceptions thrown by this fellow: | |
| 5293 make_slow_call_ex(call, env()->Throwable_klass(), false); | |
| 5294 } | |
| 5295 | |
| 5296 // Helper function; generates code for cases requiring runtime checks. | |
| 5297 Node* | |
| 5298 LibraryCallKit::generate_checkcast_arraycopy(const TypePtr* adr_type, | |
| 5299 Node* dest_elem_klass, | |
| 5300 Node* src, Node* src_offset, | |
| 5301 Node* dest, Node* dest_offset, | |
| 2324 | 5302 Node* copy_length, bool dest_uninitialized) { |
| 0 | 5303 if (stopped()) return NULL; |
| 5304 | |
| 2324 | 5305 address copyfunc_addr = StubRoutines::checkcast_arraycopy(dest_uninitialized); |
| 0 | 5306 if (copyfunc_addr == NULL) { // Stub was not generated, go slow path. |
| 5307 return NULL; | |
| 5308 } | |
| 5309 | |
| 5310 // Pick out the parameters required to perform a store-check | |
| 5311 // for the target array. This is an optimistic check. It will | |
| 5312 // look in each non-null element's class, at the desired klass's | |
| 5313 // super_check_offset, for the desired klass. | |
| 5314 int sco_offset = Klass::super_check_offset_offset_in_bytes() + sizeof(oopDesc); | |
| 5315 Node* p3 = basic_plus_adr(dest_elem_klass, sco_offset); | |
| 1609 | 5316 Node* n3 = new(C, 3) LoadINode(NULL, memory(p3), p3, _gvn.type(p3)->is_ptr()); |
|
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|
5317 Node* check_offset = ConvI2X(_gvn.transform(n3)); |
| 0 | 5318 Node* check_value = dest_elem_klass; |
| 5319 | |
| 5320 Node* src_start = array_element_address(src, src_offset, T_OBJECT); | |
| 5321 Node* dest_start = array_element_address(dest, dest_offset, T_OBJECT); | |
| 5322 | |
| 5323 // (We know the arrays are never conjoint, because their types differ.) | |
| 5324 Node* call = make_runtime_call(RC_LEAF|RC_NO_FP, | |
| 5325 OptoRuntime::checkcast_arraycopy_Type(), | |
| 5326 copyfunc_addr, "checkcast_arraycopy", adr_type, | |
| 5327 // five arguments, of which two are | |
| 5328 // intptr_t (jlong in LP64) | |
| 5329 src_start, dest_start, | |
| 5330 copy_length XTOP, | |
| 5331 check_offset XTOP, | |
| 5332 check_value); | |
| 5333 | |
| 5334 return _gvn.transform(new (C, 1) ProjNode(call, TypeFunc::Parms)); | |
| 5335 } | |
| 5336 | |
| 5337 | |
| 5338 // Helper function; generates code for cases requiring runtime checks. | |
| 5339 Node* | |
| 5340 LibraryCallKit::generate_generic_arraycopy(const TypePtr* adr_type, | |
| 5341 Node* src, Node* src_offset, | |
| 5342 Node* dest, Node* dest_offset, | |
| 2324 | 5343 Node* copy_length, bool dest_uninitialized) { |
| 5344 assert(!dest_uninitialized, "Invariant"); | |
| 0 | 5345 if (stopped()) return NULL; |
| 5346 address copyfunc_addr = StubRoutines::generic_arraycopy(); | |
| 5347 if (copyfunc_addr == NULL) { // Stub was not generated, go slow path. | |
| 5348 return NULL; | |
| 5349 } | |
| 5350 | |
| 5351 Node* call = make_runtime_call(RC_LEAF|RC_NO_FP, | |
| 5352 OptoRuntime::generic_arraycopy_Type(), | |
| 5353 copyfunc_addr, "generic_arraycopy", adr_type, | |
| 5354 src, src_offset, dest, dest_offset, copy_length); | |
| 5355 | |
| 5356 return _gvn.transform(new (C, 1) ProjNode(call, TypeFunc::Parms)); | |
| 5357 } | |
| 5358 | |
| 5359 // Helper function; generates the fast out-of-line call to an arraycopy stub. | |
| 5360 void | |
| 5361 LibraryCallKit::generate_unchecked_arraycopy(const TypePtr* adr_type, | |
| 5362 BasicType basic_elem_type, | |
| 5363 bool disjoint_bases, | |
| 5364 Node* src, Node* src_offset, | |
| 5365 Node* dest, Node* dest_offset, | |
| 2324 | 5366 Node* copy_length, bool dest_uninitialized) { |
| 0 | 5367 if (stopped()) return; // nothing to do |
| 5368 | |
| 5369 Node* src_start = src; | |
| 5370 Node* dest_start = dest; | |
| 5371 if (src_offset != NULL || dest_offset != NULL) { | |
| 5372 assert(src_offset != NULL && dest_offset != NULL, ""); | |
| 5373 src_start = array_element_address(src, src_offset, basic_elem_type); | |
| 5374 dest_start = array_element_address(dest, dest_offset, basic_elem_type); | |
| 5375 } | |
| 5376 | |
| 5377 // Figure out which arraycopy runtime method to call. | |
| 5378 const char* copyfunc_name = "arraycopy"; | |
| 5379 address copyfunc_addr = | |
| 5380 basictype2arraycopy(basic_elem_type, src_offset, dest_offset, | |
| 2324 | 5381 disjoint_bases, copyfunc_name, dest_uninitialized); |
| 0 | 5382 |
| 5383 // Call it. Note that the count_ix value is not scaled to a byte-size. | |
| 5384 make_runtime_call(RC_LEAF|RC_NO_FP, | |
| 5385 OptoRuntime::fast_arraycopy_Type(), | |
| 5386 copyfunc_addr, copyfunc_name, adr_type, | |
| 5387 src_start, dest_start, copy_length XTOP); | |
| 5388 } | |
|
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5389 |
|
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5390 //----------------------------inline_reference_get---------------------------- |
|
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|
5391 |
|
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|
5392 bool LibraryCallKit::inline_reference_get() { |
|
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|
5393 const int nargs = 1; // self |
|
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|
5394 |
|
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|
5395 guarantee(java_lang_ref_Reference::referent_offset > 0, |
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5396 "should have already been set"); |
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5397 |
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5398 int referent_offset = java_lang_ref_Reference::referent_offset; |
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5399 |
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5400 // Restore the stack and pop off the argument |
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5401 _sp += nargs; |
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5402 Node *reference_obj = pop(); |
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5403 |
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5404 // Null check on self without removing any arguments. |
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5405 _sp += nargs; |
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5406 reference_obj = do_null_check(reference_obj, T_OBJECT); |
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5407 _sp -= nargs;; |
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5408 |
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5409 if (stopped()) return true; |
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|
5410 |
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5411 Node *adr = basic_plus_adr(reference_obj, reference_obj, referent_offset); |
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5412 |
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5413 ciInstanceKlass* klass = env()->Object_klass(); |
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5414 const TypeOopPtr* object_type = TypeOopPtr::make_from_klass(klass); |
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5415 |
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5416 Node* no_ctrl = NULL; |
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5417 Node *result = make_load(no_ctrl, adr, object_type, T_OBJECT); |
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5418 |
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5419 // Use the pre-barrier to record the value in the referent field |
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5420 pre_barrier(false /* do_load */, |
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5421 control(), |
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5422 NULL /* obj */, NULL /* adr */, -1 /* alias_idx */, NULL /* val */, NULL /* val_type */, |
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5423 result /* pre_val */, |
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5424 T_OBJECT); |
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|
5425 |
|
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5426 push(result); |
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5427 return true; |
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5428 } |
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5429 |