Mercurial > hg > truffle
annotate src/share/vm/opto/library_call.cpp @ 235:9c2ecc2ffb12 jdk7-b31
Merge
| author | trims |
|---|---|
| date | Fri, 11 Jul 2008 01:14:44 -0700 |
| parents | d1605aabd0a1 1e026f8da827 |
| children | a1980da045cc |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 196 | 2 * Copyright 1999-2008 Sun Microsystems, Inc. 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include "incls/_precompiled.incl" | |
| 26 #include "incls/_library_call.cpp.incl" | |
| 27 | |
| 28 class LibraryIntrinsic : public InlineCallGenerator { | |
| 29 // Extend the set of intrinsics known to the runtime: | |
| 30 public: | |
| 31 private: | |
| 32 bool _is_virtual; | |
| 33 vmIntrinsics::ID _intrinsic_id; | |
| 34 | |
| 35 public: | |
| 36 LibraryIntrinsic(ciMethod* m, bool is_virtual, vmIntrinsics::ID id) | |
| 37 : InlineCallGenerator(m), | |
| 38 _is_virtual(is_virtual), | |
| 39 _intrinsic_id(id) | |
| 40 { | |
| 41 } | |
| 42 virtual bool is_intrinsic() const { return true; } | |
| 43 virtual bool is_virtual() const { return _is_virtual; } | |
| 44 virtual JVMState* generate(JVMState* jvms); | |
| 45 vmIntrinsics::ID intrinsic_id() const { return _intrinsic_id; } | |
| 46 }; | |
| 47 | |
| 48 | |
| 49 // Local helper class for LibraryIntrinsic: | |
| 50 class LibraryCallKit : public GraphKit { | |
| 51 private: | |
| 52 LibraryIntrinsic* _intrinsic; // the library intrinsic being called | |
| 53 | |
| 54 public: | |
| 55 LibraryCallKit(JVMState* caller, LibraryIntrinsic* intrinsic) | |
| 56 : GraphKit(caller), | |
| 57 _intrinsic(intrinsic) | |
| 58 { | |
| 59 } | |
| 60 | |
| 61 ciMethod* caller() const { return jvms()->method(); } | |
| 62 int bci() const { return jvms()->bci(); } | |
| 63 LibraryIntrinsic* intrinsic() const { return _intrinsic; } | |
| 64 vmIntrinsics::ID intrinsic_id() const { return _intrinsic->intrinsic_id(); } | |
| 65 ciMethod* callee() const { return _intrinsic->method(); } | |
| 66 ciSignature* signature() const { return callee()->signature(); } | |
| 67 int arg_size() const { return callee()->arg_size(); } | |
| 68 | |
| 69 bool try_to_inline(); | |
| 70 | |
| 71 // Helper functions to inline natives | |
| 72 void push_result(RegionNode* region, PhiNode* value); | |
| 73 Node* generate_guard(Node* test, RegionNode* region, float true_prob); | |
| 74 Node* generate_slow_guard(Node* test, RegionNode* region); | |
| 75 Node* generate_fair_guard(Node* test, RegionNode* region); | |
| 76 Node* generate_negative_guard(Node* index, RegionNode* region, | |
| 77 // resulting CastII of index: | |
| 78 Node* *pos_index = NULL); | |
| 79 Node* generate_nonpositive_guard(Node* index, bool never_negative, | |
| 80 // resulting CastII of index: | |
| 81 Node* *pos_index = NULL); | |
| 82 Node* generate_limit_guard(Node* offset, Node* subseq_length, | |
| 83 Node* array_length, | |
| 84 RegionNode* region); | |
| 85 Node* generate_current_thread(Node* &tls_output); | |
| 86 address basictype2arraycopy(BasicType t, Node *src_offset, Node *dest_offset, | |
| 87 bool disjoint_bases, const char* &name); | |
| 88 Node* load_mirror_from_klass(Node* klass); | |
| 89 Node* load_klass_from_mirror_common(Node* mirror, bool never_see_null, | |
| 90 int nargs, | |
| 91 RegionNode* region, int null_path, | |
| 92 int offset); | |
| 93 Node* load_klass_from_mirror(Node* mirror, bool never_see_null, int nargs, | |
| 94 RegionNode* region, int null_path) { | |
| 95 int offset = java_lang_Class::klass_offset_in_bytes(); | |
| 96 return load_klass_from_mirror_common(mirror, never_see_null, nargs, | |
| 97 region, null_path, | |
| 98 offset); | |
| 99 } | |
| 100 Node* load_array_klass_from_mirror(Node* mirror, bool never_see_null, | |
| 101 int nargs, | |
| 102 RegionNode* region, int null_path) { | |
| 103 int offset = java_lang_Class::array_klass_offset_in_bytes(); | |
| 104 return load_klass_from_mirror_common(mirror, never_see_null, nargs, | |
| 105 region, null_path, | |
| 106 offset); | |
| 107 } | |
| 108 Node* generate_access_flags_guard(Node* kls, | |
| 109 int modifier_mask, int modifier_bits, | |
| 110 RegionNode* region); | |
| 111 Node* generate_interface_guard(Node* kls, RegionNode* region); | |
| 112 Node* generate_array_guard(Node* kls, RegionNode* region) { | |
| 113 return generate_array_guard_common(kls, region, false, false); | |
| 114 } | |
| 115 Node* generate_non_array_guard(Node* kls, RegionNode* region) { | |
| 116 return generate_array_guard_common(kls, region, false, true); | |
| 117 } | |
| 118 Node* generate_objArray_guard(Node* kls, RegionNode* region) { | |
| 119 return generate_array_guard_common(kls, region, true, false); | |
| 120 } | |
| 121 Node* generate_non_objArray_guard(Node* kls, RegionNode* region) { | |
| 122 return generate_array_guard_common(kls, region, true, true); | |
| 123 } | |
| 124 Node* generate_array_guard_common(Node* kls, RegionNode* region, | |
| 125 bool obj_array, bool not_array); | |
| 126 Node* generate_virtual_guard(Node* obj_klass, RegionNode* slow_region); | |
| 127 CallJavaNode* generate_method_call(vmIntrinsics::ID method_id, | |
| 128 bool is_virtual = false, bool is_static = false); | |
| 129 CallJavaNode* generate_method_call_static(vmIntrinsics::ID method_id) { | |
| 130 return generate_method_call(method_id, false, true); | |
| 131 } | |
| 132 CallJavaNode* generate_method_call_virtual(vmIntrinsics::ID method_id) { | |
| 133 return generate_method_call(method_id, true, false); | |
| 134 } | |
| 135 | |
| 136 bool inline_string_compareTo(); | |
| 137 bool inline_string_indexOf(); | |
| 138 Node* string_indexOf(Node* string_object, ciTypeArray* target_array, jint offset, jint cache_i, jint md2_i); | |
| 139 Node* pop_math_arg(); | |
| 140 bool runtime_math(const TypeFunc* call_type, address funcAddr, const char* funcName); | |
| 141 bool inline_math_native(vmIntrinsics::ID id); | |
| 142 bool inline_trig(vmIntrinsics::ID id); | |
| 143 bool inline_trans(vmIntrinsics::ID id); | |
| 144 bool inline_abs(vmIntrinsics::ID id); | |
| 145 bool inline_sqrt(vmIntrinsics::ID id); | |
| 146 bool inline_pow(vmIntrinsics::ID id); | |
| 147 bool inline_exp(vmIntrinsics::ID id); | |
| 148 bool inline_min_max(vmIntrinsics::ID id); | |
| 149 Node* generate_min_max(vmIntrinsics::ID id, Node* x, Node* y); | |
| 150 // This returns Type::AnyPtr, RawPtr, or OopPtr. | |
| 151 int classify_unsafe_addr(Node* &base, Node* &offset); | |
| 152 Node* make_unsafe_address(Node* base, Node* offset); | |
| 153 bool inline_unsafe_access(bool is_native_ptr, bool is_store, BasicType type, bool is_volatile); | |
| 154 bool inline_unsafe_prefetch(bool is_native_ptr, bool is_store, bool is_static); | |
| 155 bool inline_unsafe_allocate(); | |
| 156 bool inline_unsafe_copyMemory(); | |
| 157 bool inline_native_currentThread(); | |
| 158 bool inline_native_time_funcs(bool isNano); | |
| 159 bool inline_native_isInterrupted(); | |
| 160 bool inline_native_Class_query(vmIntrinsics::ID id); | |
| 161 bool inline_native_subtype_check(); | |
| 162 | |
| 163 bool inline_native_newArray(); | |
| 164 bool inline_native_getLength(); | |
| 165 bool inline_array_copyOf(bool is_copyOfRange); | |
|
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166 bool inline_array_equals(); |
| 0 | 167 bool inline_native_clone(bool is_virtual); |
| 168 bool inline_native_Reflection_getCallerClass(); | |
| 169 bool inline_native_AtomicLong_get(); | |
| 170 bool inline_native_AtomicLong_attemptUpdate(); | |
| 171 bool is_method_invoke_or_aux_frame(JVMState* jvms); | |
| 172 // Helper function for inlining native object hash method | |
| 173 bool inline_native_hashcode(bool is_virtual, bool is_static); | |
| 174 bool inline_native_getClass(); | |
| 175 | |
| 176 // Helper functions for inlining arraycopy | |
| 177 bool inline_arraycopy(); | |
| 178 void generate_arraycopy(const TypePtr* adr_type, | |
| 179 BasicType basic_elem_type, | |
| 180 Node* src, Node* src_offset, | |
| 181 Node* dest, Node* dest_offset, | |
| 182 Node* copy_length, | |
| 183 int nargs, // arguments on stack for debug info | |
| 184 bool disjoint_bases = false, | |
| 185 bool length_never_negative = false, | |
| 186 RegionNode* slow_region = NULL); | |
| 187 AllocateArrayNode* tightly_coupled_allocation(Node* ptr, | |
| 188 RegionNode* slow_region); | |
| 189 void generate_clear_array(const TypePtr* adr_type, | |
| 190 Node* dest, | |
| 191 BasicType basic_elem_type, | |
| 192 Node* slice_off, | |
| 193 Node* slice_len, | |
| 194 Node* slice_end); | |
| 195 bool generate_block_arraycopy(const TypePtr* adr_type, | |
| 196 BasicType basic_elem_type, | |
| 197 AllocateNode* alloc, | |
| 198 Node* src, Node* src_offset, | |
| 199 Node* dest, Node* dest_offset, | |
| 200 Node* dest_size); | |
| 201 void generate_slow_arraycopy(const TypePtr* adr_type, | |
| 202 Node* src, Node* src_offset, | |
| 203 Node* dest, Node* dest_offset, | |
| 204 Node* copy_length, | |
| 205 int nargs); | |
| 206 Node* generate_checkcast_arraycopy(const TypePtr* adr_type, | |
| 207 Node* dest_elem_klass, | |
| 208 Node* src, Node* src_offset, | |
| 209 Node* dest, Node* dest_offset, | |
| 210 Node* copy_length, int nargs); | |
| 211 Node* generate_generic_arraycopy(const TypePtr* adr_type, | |
| 212 Node* src, Node* src_offset, | |
| 213 Node* dest, Node* dest_offset, | |
| 214 Node* copy_length, int nargs); | |
| 215 void generate_unchecked_arraycopy(const TypePtr* adr_type, | |
| 216 BasicType basic_elem_type, | |
| 217 bool disjoint_bases, | |
| 218 Node* src, Node* src_offset, | |
| 219 Node* dest, Node* dest_offset, | |
| 220 Node* copy_length); | |
| 221 bool inline_unsafe_CAS(BasicType type); | |
| 222 bool inline_unsafe_ordered_store(BasicType type); | |
| 223 bool inline_fp_conversions(vmIntrinsics::ID id); | |
| 224 bool inline_reverseBytes(vmIntrinsics::ID id); | |
| 225 }; | |
| 226 | |
| 227 | |
| 228 //---------------------------make_vm_intrinsic---------------------------- | |
| 229 CallGenerator* Compile::make_vm_intrinsic(ciMethod* m, bool is_virtual) { | |
| 230 vmIntrinsics::ID id = m->intrinsic_id(); | |
| 231 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); | |
| 232 | |
| 233 if (DisableIntrinsic[0] != '\0' | |
| 234 && strstr(DisableIntrinsic, vmIntrinsics::name_at(id)) != NULL) { | |
| 235 // disabled by a user request on the command line: | |
| 236 // example: -XX:DisableIntrinsic=_hashCode,_getClass | |
| 237 return NULL; | |
| 238 } | |
| 239 | |
| 240 if (!m->is_loaded()) { | |
| 241 // do not attempt to inline unloaded methods | |
| 242 return NULL; | |
| 243 } | |
| 244 | |
| 245 // Only a few intrinsics implement a virtual dispatch. | |
| 246 // They are expensive calls which are also frequently overridden. | |
| 247 if (is_virtual) { | |
| 248 switch (id) { | |
| 249 case vmIntrinsics::_hashCode: | |
| 250 case vmIntrinsics::_clone: | |
| 251 // OK, Object.hashCode and Object.clone intrinsics come in both flavors | |
| 252 break; | |
| 253 default: | |
| 254 return NULL; | |
| 255 } | |
| 256 } | |
| 257 | |
| 258 // -XX:-InlineNatives disables nearly all intrinsics: | |
| 259 if (!InlineNatives) { | |
| 260 switch (id) { | |
| 261 case vmIntrinsics::_indexOf: | |
| 262 case vmIntrinsics::_compareTo: | |
|
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263 case vmIntrinsics::_equalsC: |
| 0 | 264 break; // InlineNatives does not control String.compareTo |
| 265 default: | |
| 266 return NULL; | |
| 267 } | |
| 268 } | |
| 269 | |
| 270 switch (id) { | |
| 271 case vmIntrinsics::_compareTo: | |
| 272 if (!SpecialStringCompareTo) return NULL; | |
| 273 break; | |
| 274 case vmIntrinsics::_indexOf: | |
| 275 if (!SpecialStringIndexOf) return NULL; | |
| 276 break; | |
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277 case vmIntrinsics::_equalsC: |
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278 if (!SpecialArraysEquals) return NULL; |
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279 break; |
| 0 | 280 case vmIntrinsics::_arraycopy: |
| 281 if (!InlineArrayCopy) return NULL; | |
| 282 break; | |
| 283 case vmIntrinsics::_copyMemory: | |
| 284 if (StubRoutines::unsafe_arraycopy() == NULL) return NULL; | |
| 285 if (!InlineArrayCopy) return NULL; | |
| 286 break; | |
| 287 case vmIntrinsics::_hashCode: | |
| 288 if (!InlineObjectHash) return NULL; | |
| 289 break; | |
| 290 case vmIntrinsics::_clone: | |
| 291 case vmIntrinsics::_copyOf: | |
| 292 case vmIntrinsics::_copyOfRange: | |
| 293 if (!InlineObjectCopy) return NULL; | |
| 294 // These also use the arraycopy intrinsic mechanism: | |
| 295 if (!InlineArrayCopy) return NULL; | |
| 296 break; | |
| 297 case vmIntrinsics::_checkIndex: | |
| 298 // We do not intrinsify this. The optimizer does fine with it. | |
| 299 return NULL; | |
| 300 | |
| 301 case vmIntrinsics::_get_AtomicLong: | |
| 302 case vmIntrinsics::_attemptUpdate: | |
| 303 if (!InlineAtomicLong) return NULL; | |
| 304 break; | |
| 305 | |
| 306 case vmIntrinsics::_Object_init: | |
| 307 case vmIntrinsics::_invoke: | |
| 308 // We do not intrinsify these; they are marked for other purposes. | |
| 309 return NULL; | |
| 310 | |
| 311 case vmIntrinsics::_getCallerClass: | |
| 312 if (!UseNewReflection) return NULL; | |
| 313 if (!InlineReflectionGetCallerClass) return NULL; | |
| 314 if (!JDK_Version::is_gte_jdk14x_version()) return NULL; | |
| 315 break; | |
| 316 | |
| 317 default: | |
| 318 break; | |
| 319 } | |
| 320 | |
| 321 // -XX:-InlineClassNatives disables natives from the Class class. | |
| 322 // The flag applies to all reflective calls, notably Array.newArray | |
| 323 // (visible to Java programmers as Array.newInstance). | |
| 324 if (m->holder()->name() == ciSymbol::java_lang_Class() || | |
| 325 m->holder()->name() == ciSymbol::java_lang_reflect_Array()) { | |
| 326 if (!InlineClassNatives) return NULL; | |
| 327 } | |
| 328 | |
| 329 // -XX:-InlineThreadNatives disables natives from the Thread class. | |
| 330 if (m->holder()->name() == ciSymbol::java_lang_Thread()) { | |
| 331 if (!InlineThreadNatives) return NULL; | |
| 332 } | |
| 333 | |
| 334 // -XX:-InlineMathNatives disables natives from the Math,Float and Double classes. | |
| 335 if (m->holder()->name() == ciSymbol::java_lang_Math() || | |
| 336 m->holder()->name() == ciSymbol::java_lang_Float() || | |
| 337 m->holder()->name() == ciSymbol::java_lang_Double()) { | |
| 338 if (!InlineMathNatives) return NULL; | |
| 339 } | |
| 340 | |
| 341 // -XX:-InlineUnsafeOps disables natives from the Unsafe class. | |
| 342 if (m->holder()->name() == ciSymbol::sun_misc_Unsafe()) { | |
| 343 if (!InlineUnsafeOps) return NULL; | |
| 344 } | |
| 345 | |
| 346 return new LibraryIntrinsic(m, is_virtual, (vmIntrinsics::ID) id); | |
| 347 } | |
| 348 | |
| 349 //----------------------register_library_intrinsics----------------------- | |
| 350 // Initialize this file's data structures, for each Compile instance. | |
| 351 void Compile::register_library_intrinsics() { | |
| 352 // Nothing to do here. | |
| 353 } | |
| 354 | |
| 355 JVMState* LibraryIntrinsic::generate(JVMState* jvms) { | |
| 356 LibraryCallKit kit(jvms, this); | |
| 357 Compile* C = kit.C; | |
| 358 int nodes = C->unique(); | |
| 359 #ifndef PRODUCT | |
| 360 if ((PrintIntrinsics || PrintInlining NOT_PRODUCT( || PrintOptoInlining) ) && Verbose) { | |
| 361 char buf[1000]; | |
| 362 const char* str = vmIntrinsics::short_name_as_C_string(intrinsic_id(), buf, sizeof(buf)); | |
| 363 tty->print_cr("Intrinsic %s", str); | |
| 364 } | |
| 365 #endif | |
| 366 if (kit.try_to_inline()) { | |
| 367 if (PrintIntrinsics || PrintInlining NOT_PRODUCT( || PrintOptoInlining) ) { | |
| 368 tty->print("Inlining intrinsic %s%s at bci:%d in", | |
| 369 vmIntrinsics::name_at(intrinsic_id()), | |
| 370 (is_virtual() ? " (virtual)" : ""), kit.bci()); | |
| 371 kit.caller()->print_short_name(tty); | |
| 372 tty->print_cr(" (%d bytes)", kit.caller()->code_size()); | |
| 373 } | |
| 374 C->gather_intrinsic_statistics(intrinsic_id(), is_virtual(), Compile::_intrinsic_worked); | |
| 375 if (C->log()) { | |
| 376 C->log()->elem("intrinsic id='%s'%s nodes='%d'", | |
| 377 vmIntrinsics::name_at(intrinsic_id()), | |
| 378 (is_virtual() ? " virtual='1'" : ""), | |
| 379 C->unique() - nodes); | |
| 380 } | |
| 381 return kit.transfer_exceptions_into_jvms(); | |
| 382 } | |
| 383 | |
| 384 if (PrintIntrinsics) { | |
| 385 switch (intrinsic_id()) { | |
| 386 case vmIntrinsics::_invoke: | |
| 387 case vmIntrinsics::_Object_init: | |
| 388 // We do not expect to inline these, so do not produce any noise about them. | |
| 389 break; | |
| 390 default: | |
| 391 tty->print("Did not inline intrinsic %s%s at bci:%d in", | |
| 392 vmIntrinsics::name_at(intrinsic_id()), | |
| 393 (is_virtual() ? " (virtual)" : ""), kit.bci()); | |
| 394 kit.caller()->print_short_name(tty); | |
| 395 tty->print_cr(" (%d bytes)", kit.caller()->code_size()); | |
| 396 } | |
| 397 } | |
| 398 C->gather_intrinsic_statistics(intrinsic_id(), is_virtual(), Compile::_intrinsic_failed); | |
| 399 return NULL; | |
| 400 } | |
| 401 | |
| 402 bool LibraryCallKit::try_to_inline() { | |
| 403 // Handle symbolic names for otherwise undistinguished boolean switches: | |
| 404 const bool is_store = true; | |
| 405 const bool is_native_ptr = true; | |
| 406 const bool is_static = true; | |
| 407 | |
| 408 switch (intrinsic_id()) { | |
| 409 case vmIntrinsics::_hashCode: | |
| 410 return inline_native_hashcode(intrinsic()->is_virtual(), !is_static); | |
| 411 case vmIntrinsics::_identityHashCode: | |
| 412 return inline_native_hashcode(/*!virtual*/ false, is_static); | |
| 413 case vmIntrinsics::_getClass: | |
| 414 return inline_native_getClass(); | |
| 415 | |
| 416 case vmIntrinsics::_dsin: | |
| 417 case vmIntrinsics::_dcos: | |
| 418 case vmIntrinsics::_dtan: | |
| 419 case vmIntrinsics::_dabs: | |
| 420 case vmIntrinsics::_datan2: | |
| 421 case vmIntrinsics::_dsqrt: | |
| 422 case vmIntrinsics::_dexp: | |
| 423 case vmIntrinsics::_dlog: | |
| 424 case vmIntrinsics::_dlog10: | |
| 425 case vmIntrinsics::_dpow: | |
| 426 return inline_math_native(intrinsic_id()); | |
| 427 | |
| 428 case vmIntrinsics::_min: | |
| 429 case vmIntrinsics::_max: | |
| 430 return inline_min_max(intrinsic_id()); | |
| 431 | |
| 432 case vmIntrinsics::_arraycopy: | |
| 433 return inline_arraycopy(); | |
| 434 | |
| 435 case vmIntrinsics::_compareTo: | |
| 436 return inline_string_compareTo(); | |
| 437 case vmIntrinsics::_indexOf: | |
| 438 return inline_string_indexOf(); | |
| 439 | |
| 440 case vmIntrinsics::_getObject: | |
| 441 return inline_unsafe_access(!is_native_ptr, !is_store, T_OBJECT, false); | |
| 442 case vmIntrinsics::_getBoolean: | |
| 443 return inline_unsafe_access(!is_native_ptr, !is_store, T_BOOLEAN, false); | |
| 444 case vmIntrinsics::_getByte: | |
| 445 return inline_unsafe_access(!is_native_ptr, !is_store, T_BYTE, false); | |
| 446 case vmIntrinsics::_getShort: | |
| 447 return inline_unsafe_access(!is_native_ptr, !is_store, T_SHORT, false); | |
| 448 case vmIntrinsics::_getChar: | |
| 449 return inline_unsafe_access(!is_native_ptr, !is_store, T_CHAR, false); | |
| 450 case vmIntrinsics::_getInt: | |
| 451 return inline_unsafe_access(!is_native_ptr, !is_store, T_INT, false); | |
| 452 case vmIntrinsics::_getLong: | |
| 453 return inline_unsafe_access(!is_native_ptr, !is_store, T_LONG, false); | |
| 454 case vmIntrinsics::_getFloat: | |
| 455 return inline_unsafe_access(!is_native_ptr, !is_store, T_FLOAT, false); | |
| 456 case vmIntrinsics::_getDouble: | |
| 457 return inline_unsafe_access(!is_native_ptr, !is_store, T_DOUBLE, false); | |
| 458 | |
| 459 case vmIntrinsics::_putObject: | |
| 460 return inline_unsafe_access(!is_native_ptr, is_store, T_OBJECT, false); | |
| 461 case vmIntrinsics::_putBoolean: | |
| 462 return inline_unsafe_access(!is_native_ptr, is_store, T_BOOLEAN, false); | |
| 463 case vmIntrinsics::_putByte: | |
| 464 return inline_unsafe_access(!is_native_ptr, is_store, T_BYTE, false); | |
| 465 case vmIntrinsics::_putShort: | |
| 466 return inline_unsafe_access(!is_native_ptr, is_store, T_SHORT, false); | |
| 467 case vmIntrinsics::_putChar: | |
| 468 return inline_unsafe_access(!is_native_ptr, is_store, T_CHAR, false); | |
| 469 case vmIntrinsics::_putInt: | |
| 470 return inline_unsafe_access(!is_native_ptr, is_store, T_INT, false); | |
| 471 case vmIntrinsics::_putLong: | |
| 472 return inline_unsafe_access(!is_native_ptr, is_store, T_LONG, false); | |
| 473 case vmIntrinsics::_putFloat: | |
| 474 return inline_unsafe_access(!is_native_ptr, is_store, T_FLOAT, false); | |
| 475 case vmIntrinsics::_putDouble: | |
| 476 return inline_unsafe_access(!is_native_ptr, is_store, T_DOUBLE, false); | |
| 477 | |
| 478 case vmIntrinsics::_getByte_raw: | |
| 479 return inline_unsafe_access(is_native_ptr, !is_store, T_BYTE, false); | |
| 480 case vmIntrinsics::_getShort_raw: | |
| 481 return inline_unsafe_access(is_native_ptr, !is_store, T_SHORT, false); | |
| 482 case vmIntrinsics::_getChar_raw: | |
| 483 return inline_unsafe_access(is_native_ptr, !is_store, T_CHAR, false); | |
| 484 case vmIntrinsics::_getInt_raw: | |
| 485 return inline_unsafe_access(is_native_ptr, !is_store, T_INT, false); | |
| 486 case vmIntrinsics::_getLong_raw: | |
| 487 return inline_unsafe_access(is_native_ptr, !is_store, T_LONG, false); | |
| 488 case vmIntrinsics::_getFloat_raw: | |
| 489 return inline_unsafe_access(is_native_ptr, !is_store, T_FLOAT, false); | |
| 490 case vmIntrinsics::_getDouble_raw: | |
| 491 return inline_unsafe_access(is_native_ptr, !is_store, T_DOUBLE, false); | |
| 492 case vmIntrinsics::_getAddress_raw: | |
| 493 return inline_unsafe_access(is_native_ptr, !is_store, T_ADDRESS, false); | |
| 494 | |
| 495 case vmIntrinsics::_putByte_raw: | |
| 496 return inline_unsafe_access(is_native_ptr, is_store, T_BYTE, false); | |
| 497 case vmIntrinsics::_putShort_raw: | |
| 498 return inline_unsafe_access(is_native_ptr, is_store, T_SHORT, false); | |
| 499 case vmIntrinsics::_putChar_raw: | |
| 500 return inline_unsafe_access(is_native_ptr, is_store, T_CHAR, false); | |
| 501 case vmIntrinsics::_putInt_raw: | |
| 502 return inline_unsafe_access(is_native_ptr, is_store, T_INT, false); | |
| 503 case vmIntrinsics::_putLong_raw: | |
| 504 return inline_unsafe_access(is_native_ptr, is_store, T_LONG, false); | |
| 505 case vmIntrinsics::_putFloat_raw: | |
| 506 return inline_unsafe_access(is_native_ptr, is_store, T_FLOAT, false); | |
| 507 case vmIntrinsics::_putDouble_raw: | |
| 508 return inline_unsafe_access(is_native_ptr, is_store, T_DOUBLE, false); | |
| 509 case vmIntrinsics::_putAddress_raw: | |
| 510 return inline_unsafe_access(is_native_ptr, is_store, T_ADDRESS, false); | |
| 511 | |
| 512 case vmIntrinsics::_getObjectVolatile: | |
| 513 return inline_unsafe_access(!is_native_ptr, !is_store, T_OBJECT, true); | |
| 514 case vmIntrinsics::_getBooleanVolatile: | |
| 515 return inline_unsafe_access(!is_native_ptr, !is_store, T_BOOLEAN, true); | |
| 516 case vmIntrinsics::_getByteVolatile: | |
| 517 return inline_unsafe_access(!is_native_ptr, !is_store, T_BYTE, true); | |
| 518 case vmIntrinsics::_getShortVolatile: | |
| 519 return inline_unsafe_access(!is_native_ptr, !is_store, T_SHORT, true); | |
| 520 case vmIntrinsics::_getCharVolatile: | |
| 521 return inline_unsafe_access(!is_native_ptr, !is_store, T_CHAR, true); | |
| 522 case vmIntrinsics::_getIntVolatile: | |
| 523 return inline_unsafe_access(!is_native_ptr, !is_store, T_INT, true); | |
| 524 case vmIntrinsics::_getLongVolatile: | |
| 525 return inline_unsafe_access(!is_native_ptr, !is_store, T_LONG, true); | |
| 526 case vmIntrinsics::_getFloatVolatile: | |
| 527 return inline_unsafe_access(!is_native_ptr, !is_store, T_FLOAT, true); | |
| 528 case vmIntrinsics::_getDoubleVolatile: | |
| 529 return inline_unsafe_access(!is_native_ptr, !is_store, T_DOUBLE, true); | |
| 530 | |
| 531 case vmIntrinsics::_putObjectVolatile: | |
| 532 return inline_unsafe_access(!is_native_ptr, is_store, T_OBJECT, true); | |
| 533 case vmIntrinsics::_putBooleanVolatile: | |
| 534 return inline_unsafe_access(!is_native_ptr, is_store, T_BOOLEAN, true); | |
| 535 case vmIntrinsics::_putByteVolatile: | |
| 536 return inline_unsafe_access(!is_native_ptr, is_store, T_BYTE, true); | |
| 537 case vmIntrinsics::_putShortVolatile: | |
| 538 return inline_unsafe_access(!is_native_ptr, is_store, T_SHORT, true); | |
| 539 case vmIntrinsics::_putCharVolatile: | |
| 540 return inline_unsafe_access(!is_native_ptr, is_store, T_CHAR, true); | |
| 541 case vmIntrinsics::_putIntVolatile: | |
| 542 return inline_unsafe_access(!is_native_ptr, is_store, T_INT, true); | |
| 543 case vmIntrinsics::_putLongVolatile: | |
| 544 return inline_unsafe_access(!is_native_ptr, is_store, T_LONG, true); | |
| 545 case vmIntrinsics::_putFloatVolatile: | |
| 546 return inline_unsafe_access(!is_native_ptr, is_store, T_FLOAT, true); | |
| 547 case vmIntrinsics::_putDoubleVolatile: | |
| 548 return inline_unsafe_access(!is_native_ptr, is_store, T_DOUBLE, true); | |
| 549 | |
| 550 case vmIntrinsics::_prefetchRead: | |
| 551 return inline_unsafe_prefetch(!is_native_ptr, !is_store, !is_static); | |
| 552 case vmIntrinsics::_prefetchWrite: | |
| 553 return inline_unsafe_prefetch(!is_native_ptr, is_store, !is_static); | |
| 554 case vmIntrinsics::_prefetchReadStatic: | |
| 555 return inline_unsafe_prefetch(!is_native_ptr, !is_store, is_static); | |
| 556 case vmIntrinsics::_prefetchWriteStatic: | |
| 557 return inline_unsafe_prefetch(!is_native_ptr, is_store, is_static); | |
| 558 | |
| 559 case vmIntrinsics::_compareAndSwapObject: | |
| 560 return inline_unsafe_CAS(T_OBJECT); | |
| 561 case vmIntrinsics::_compareAndSwapInt: | |
| 562 return inline_unsafe_CAS(T_INT); | |
| 563 case vmIntrinsics::_compareAndSwapLong: | |
| 564 return inline_unsafe_CAS(T_LONG); | |
| 565 | |
| 566 case vmIntrinsics::_putOrderedObject: | |
| 567 return inline_unsafe_ordered_store(T_OBJECT); | |
| 568 case vmIntrinsics::_putOrderedInt: | |
| 569 return inline_unsafe_ordered_store(T_INT); | |
| 570 case vmIntrinsics::_putOrderedLong: | |
| 571 return inline_unsafe_ordered_store(T_LONG); | |
| 572 | |
| 573 case vmIntrinsics::_currentThread: | |
| 574 return inline_native_currentThread(); | |
| 575 case vmIntrinsics::_isInterrupted: | |
| 576 return inline_native_isInterrupted(); | |
| 577 | |
| 578 case vmIntrinsics::_currentTimeMillis: | |
| 579 return inline_native_time_funcs(false); | |
| 580 case vmIntrinsics::_nanoTime: | |
| 581 return inline_native_time_funcs(true); | |
| 582 case vmIntrinsics::_allocateInstance: | |
| 583 return inline_unsafe_allocate(); | |
| 584 case vmIntrinsics::_copyMemory: | |
| 585 return inline_unsafe_copyMemory(); | |
| 586 case vmIntrinsics::_newArray: | |
| 587 return inline_native_newArray(); | |
| 588 case vmIntrinsics::_getLength: | |
| 589 return inline_native_getLength(); | |
| 590 case vmIntrinsics::_copyOf: | |
| 591 return inline_array_copyOf(false); | |
| 592 case vmIntrinsics::_copyOfRange: | |
| 593 return inline_array_copyOf(true); | |
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594 case vmIntrinsics::_equalsC: |
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595 return inline_array_equals(); |
| 0 | 596 case vmIntrinsics::_clone: |
| 597 return inline_native_clone(intrinsic()->is_virtual()); | |
| 598 | |
| 599 case vmIntrinsics::_isAssignableFrom: | |
| 600 return inline_native_subtype_check(); | |
| 601 | |
| 602 case vmIntrinsics::_isInstance: | |
| 603 case vmIntrinsics::_getModifiers: | |
| 604 case vmIntrinsics::_isInterface: | |
| 605 case vmIntrinsics::_isArray: | |
| 606 case vmIntrinsics::_isPrimitive: | |
| 607 case vmIntrinsics::_getSuperclass: | |
| 608 case vmIntrinsics::_getComponentType: | |
| 609 case vmIntrinsics::_getClassAccessFlags: | |
| 610 return inline_native_Class_query(intrinsic_id()); | |
| 611 | |
| 612 case vmIntrinsics::_floatToRawIntBits: | |
| 613 case vmIntrinsics::_floatToIntBits: | |
| 614 case vmIntrinsics::_intBitsToFloat: | |
| 615 case vmIntrinsics::_doubleToRawLongBits: | |
| 616 case vmIntrinsics::_doubleToLongBits: | |
| 617 case vmIntrinsics::_longBitsToDouble: | |
| 618 return inline_fp_conversions(intrinsic_id()); | |
| 619 | |
| 620 case vmIntrinsics::_reverseBytes_i: | |
| 621 case vmIntrinsics::_reverseBytes_l: | |
| 622 return inline_reverseBytes((vmIntrinsics::ID) intrinsic_id()); | |
| 623 | |
| 624 case vmIntrinsics::_get_AtomicLong: | |
| 625 return inline_native_AtomicLong_get(); | |
| 626 case vmIntrinsics::_attemptUpdate: | |
| 627 return inline_native_AtomicLong_attemptUpdate(); | |
| 628 | |
| 629 case vmIntrinsics::_getCallerClass: | |
| 630 return inline_native_Reflection_getCallerClass(); | |
| 631 | |
| 632 default: | |
| 633 // If you get here, it may be that someone has added a new intrinsic | |
| 634 // to the list in vmSymbols.hpp without implementing it here. | |
| 635 #ifndef PRODUCT | |
| 636 if ((PrintMiscellaneous && (Verbose || WizardMode)) || PrintOpto) { | |
| 637 tty->print_cr("*** Warning: Unimplemented intrinsic %s(%d)", | |
| 638 vmIntrinsics::name_at(intrinsic_id()), intrinsic_id()); | |
| 639 } | |
| 640 #endif | |
| 641 return false; | |
| 642 } | |
| 643 } | |
| 644 | |
| 645 //------------------------------push_result------------------------------ | |
| 646 // Helper function for finishing intrinsics. | |
| 647 void LibraryCallKit::push_result(RegionNode* region, PhiNode* value) { | |
| 648 record_for_igvn(region); | |
| 649 set_control(_gvn.transform(region)); | |
| 650 BasicType value_type = value->type()->basic_type(); | |
| 651 push_node(value_type, _gvn.transform(value)); | |
| 652 } | |
| 653 | |
| 654 //------------------------------generate_guard--------------------------- | |
| 655 // Helper function for generating guarded fast-slow graph structures. | |
| 656 // The given 'test', if true, guards a slow path. If the test fails | |
| 657 // then a fast path can be taken. (We generally hope it fails.) | |
| 658 // In all cases, GraphKit::control() is updated to the fast path. | |
| 659 // The returned value represents the control for the slow path. | |
| 660 // The return value is never 'top'; it is either a valid control | |
| 661 // or NULL if it is obvious that the slow path can never be taken. | |
| 662 // Also, if region and the slow control are not NULL, the slow edge | |
| 663 // is appended to the region. | |
| 664 Node* LibraryCallKit::generate_guard(Node* test, RegionNode* region, float true_prob) { | |
| 665 if (stopped()) { | |
| 666 // Already short circuited. | |
| 667 return NULL; | |
| 668 } | |
| 669 | |
| 670 // Build an if node and its projections. | |
| 671 // If test is true we take the slow path, which we assume is uncommon. | |
| 672 if (_gvn.type(test) == TypeInt::ZERO) { | |
| 673 // The slow branch is never taken. No need to build this guard. | |
| 674 return NULL; | |
| 675 } | |
| 676 | |
| 677 IfNode* iff = create_and_map_if(control(), test, true_prob, COUNT_UNKNOWN); | |
| 678 | |
| 679 Node* if_slow = _gvn.transform( new (C, 1) IfTrueNode(iff) ); | |
| 680 if (if_slow == top()) { | |
| 681 // The slow branch is never taken. No need to build this guard. | |
| 682 return NULL; | |
| 683 } | |
| 684 | |
| 685 if (region != NULL) | |
| 686 region->add_req(if_slow); | |
| 687 | |
| 688 Node* if_fast = _gvn.transform( new (C, 1) IfFalseNode(iff) ); | |
| 689 set_control(if_fast); | |
| 690 | |
| 691 return if_slow; | |
| 692 } | |
| 693 | |
| 694 inline Node* LibraryCallKit::generate_slow_guard(Node* test, RegionNode* region) { | |
| 695 return generate_guard(test, region, PROB_UNLIKELY_MAG(3)); | |
| 696 } | |
| 697 inline Node* LibraryCallKit::generate_fair_guard(Node* test, RegionNode* region) { | |
| 698 return generate_guard(test, region, PROB_FAIR); | |
| 699 } | |
| 700 | |
| 701 inline Node* LibraryCallKit::generate_negative_guard(Node* index, RegionNode* region, | |
| 702 Node* *pos_index) { | |
| 703 if (stopped()) | |
| 704 return NULL; // already stopped | |
| 705 if (_gvn.type(index)->higher_equal(TypeInt::POS)) // [0,maxint] | |
| 706 return NULL; // index is already adequately typed | |
| 707 Node* cmp_lt = _gvn.transform( new (C, 3) CmpINode(index, intcon(0)) ); | |
| 708 Node* bol_lt = _gvn.transform( new (C, 2) BoolNode(cmp_lt, BoolTest::lt) ); | |
| 709 Node* is_neg = generate_guard(bol_lt, region, PROB_MIN); | |
| 710 if (is_neg != NULL && pos_index != NULL) { | |
| 711 // Emulate effect of Parse::adjust_map_after_if. | |
| 712 Node* ccast = new (C, 2) CastIINode(index, TypeInt::POS); | |
| 713 ccast->set_req(0, control()); | |
| 714 (*pos_index) = _gvn.transform(ccast); | |
| 715 } | |
| 716 return is_neg; | |
| 717 } | |
| 718 | |
| 719 inline Node* LibraryCallKit::generate_nonpositive_guard(Node* index, bool never_negative, | |
| 720 Node* *pos_index) { | |
| 721 if (stopped()) | |
| 722 return NULL; // already stopped | |
| 723 if (_gvn.type(index)->higher_equal(TypeInt::POS1)) // [1,maxint] | |
| 724 return NULL; // index is already adequately typed | |
| 725 Node* cmp_le = _gvn.transform( new (C, 3) CmpINode(index, intcon(0)) ); | |
| 726 BoolTest::mask le_or_eq = (never_negative ? BoolTest::eq : BoolTest::le); | |
| 727 Node* bol_le = _gvn.transform( new (C, 2) BoolNode(cmp_le, le_or_eq) ); | |
| 728 Node* is_notp = generate_guard(bol_le, NULL, PROB_MIN); | |
| 729 if (is_notp != NULL && pos_index != NULL) { | |
| 730 // Emulate effect of Parse::adjust_map_after_if. | |
| 731 Node* ccast = new (C, 2) CastIINode(index, TypeInt::POS1); | |
| 732 ccast->set_req(0, control()); | |
| 733 (*pos_index) = _gvn.transform(ccast); | |
| 734 } | |
| 735 return is_notp; | |
| 736 } | |
| 737 | |
| 738 // Make sure that 'position' is a valid limit index, in [0..length]. | |
| 739 // There are two equivalent plans for checking this: | |
| 740 // A. (offset + copyLength) unsigned<= arrayLength | |
| 741 // B. offset <= (arrayLength - copyLength) | |
| 742 // We require that all of the values above, except for the sum and | |
| 743 // difference, are already known to be non-negative. | |
| 744 // Plan A is robust in the face of overflow, if offset and copyLength | |
| 745 // are both hugely positive. | |
| 746 // | |
| 747 // Plan B is less direct and intuitive, but it does not overflow at | |
| 748 // all, since the difference of two non-negatives is always | |
| 749 // representable. Whenever Java methods must perform the equivalent | |
| 750 // check they generally use Plan B instead of Plan A. | |
| 751 // For the moment we use Plan A. | |
| 752 inline Node* LibraryCallKit::generate_limit_guard(Node* offset, | |
| 753 Node* subseq_length, | |
| 754 Node* array_length, | |
| 755 RegionNode* region) { | |
| 756 if (stopped()) | |
| 757 return NULL; // already stopped | |
| 758 bool zero_offset = _gvn.type(offset) == TypeInt::ZERO; | |
| 759 if (zero_offset && _gvn.eqv_uncast(subseq_length, array_length)) | |
| 760 return NULL; // common case of whole-array copy | |
| 761 Node* last = subseq_length; | |
| 762 if (!zero_offset) // last += offset | |
| 763 last = _gvn.transform( new (C, 3) AddINode(last, offset)); | |
| 764 Node* cmp_lt = _gvn.transform( new (C, 3) CmpUNode(array_length, last) ); | |
| 765 Node* bol_lt = _gvn.transform( new (C, 2) BoolNode(cmp_lt, BoolTest::lt) ); | |
| 766 Node* is_over = generate_guard(bol_lt, region, PROB_MIN); | |
| 767 return is_over; | |
| 768 } | |
| 769 | |
| 770 | |
| 771 //--------------------------generate_current_thread-------------------- | |
| 772 Node* LibraryCallKit::generate_current_thread(Node* &tls_output) { | |
| 773 ciKlass* thread_klass = env()->Thread_klass(); | |
| 774 const Type* thread_type = TypeOopPtr::make_from_klass(thread_klass)->cast_to_ptr_type(TypePtr::NotNull); | |
| 775 Node* thread = _gvn.transform(new (C, 1) ThreadLocalNode()); | |
| 776 Node* p = basic_plus_adr(top()/*!oop*/, thread, in_bytes(JavaThread::threadObj_offset())); | |
| 777 Node* threadObj = make_load(NULL, p, thread_type, T_OBJECT); | |
| 778 tls_output = thread; | |
| 779 return threadObj; | |
| 780 } | |
| 781 | |
| 782 | |
| 783 //------------------------------inline_string_compareTo------------------------ | |
| 784 bool LibraryCallKit::inline_string_compareTo() { | |
| 785 | |
| 786 const int value_offset = java_lang_String::value_offset_in_bytes(); | |
| 787 const int count_offset = java_lang_String::count_offset_in_bytes(); | |
| 788 const int offset_offset = java_lang_String::offset_offset_in_bytes(); | |
| 789 | |
| 790 _sp += 2; | |
| 791 Node *argument = pop(); // pop non-receiver first: it was pushed second | |
| 792 Node *receiver = pop(); | |
| 793 | |
| 794 // Null check on self without removing any arguments. The argument | |
| 795 // null check technically happens in the wrong place, which can lead to | |
| 796 // invalid stack traces when string compare is inlined into a method | |
| 797 // which handles NullPointerExceptions. | |
| 798 _sp += 2; | |
| 799 receiver = do_null_check(receiver, T_OBJECT); | |
| 800 argument = do_null_check(argument, T_OBJECT); | |
| 801 _sp -= 2; | |
| 802 if (stopped()) { | |
| 803 return true; | |
| 804 } | |
| 805 | |
| 806 ciInstanceKlass* klass = env()->String_klass(); | |
| 807 const TypeInstPtr* string_type = | |
| 808 TypeInstPtr::make(TypePtr::BotPTR, klass, false, NULL, 0); | |
| 809 | |
| 810 Node* compare = | |
| 811 _gvn.transform(new (C, 7) StrCompNode( | |
| 812 control(), | |
| 813 memory(TypeAryPtr::CHARS), | |
| 814 memory(string_type->add_offset(value_offset)), | |
| 815 memory(string_type->add_offset(count_offset)), | |
| 816 memory(string_type->add_offset(offset_offset)), | |
| 817 receiver, | |
| 818 argument)); | |
| 819 push(compare); | |
| 820 return true; | |
| 821 } | |
| 822 | |
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823 //------------------------------inline_array_equals---------------------------- |
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824 bool LibraryCallKit::inline_array_equals() { |
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825 |
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826 if (!Matcher::has_match_rule(Op_AryEq)) return false; |
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827 |
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828 _sp += 2; |
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829 Node *argument2 = pop(); |
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830 Node *argument1 = pop(); |
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831 |
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832 Node* equals = |
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833 _gvn.transform(new (C, 3) AryEqNode(control(), |
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834 argument1, |
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835 argument2) |
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836 ); |
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837 push(equals); |
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838 return true; |
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839 } |
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840 |
| 0 | 841 // Java version of String.indexOf(constant string) |
| 842 // class StringDecl { | |
| 843 // StringDecl(char[] ca) { | |
| 844 // offset = 0; | |
| 845 // count = ca.length; | |
| 846 // value = ca; | |
| 847 // } | |
| 848 // int offset; | |
| 849 // int count; | |
| 850 // char[] value; | |
| 851 // } | |
| 852 // | |
| 853 // static int string_indexOf_J(StringDecl string_object, char[] target_object, | |
| 854 // int targetOffset, int cache_i, int md2) { | |
| 855 // int cache = cache_i; | |
| 856 // int sourceOffset = string_object.offset; | |
| 857 // int sourceCount = string_object.count; | |
| 858 // int targetCount = target_object.length; | |
| 859 // | |
| 860 // int targetCountLess1 = targetCount - 1; | |
| 861 // int sourceEnd = sourceOffset + sourceCount - targetCountLess1; | |
| 862 // | |
| 863 // char[] source = string_object.value; | |
| 864 // char[] target = target_object; | |
| 865 // int lastChar = target[targetCountLess1]; | |
| 866 // | |
| 867 // outer_loop: | |
| 868 // for (int i = sourceOffset; i < sourceEnd; ) { | |
| 869 // int src = source[i + targetCountLess1]; | |
| 870 // if (src == lastChar) { | |
| 871 // // With random strings and a 4-character alphabet, | |
| 872 // // reverse matching at this point sets up 0.8% fewer | |
| 873 // // frames, but (paradoxically) makes 0.3% more probes. | |
| 874 // // Since those probes are nearer the lastChar probe, | |
| 875 // // there is may be a net D$ win with reverse matching. | |
| 876 // // But, reversing loop inhibits unroll of inner loop | |
| 877 // // for unknown reason. So, does running outer loop from | |
| 878 // // (sourceOffset - targetCountLess1) to (sourceOffset + sourceCount) | |
| 879 // for (int j = 0; j < targetCountLess1; j++) { | |
| 880 // if (target[targetOffset + j] != source[i+j]) { | |
| 881 // if ((cache & (1 << source[i+j])) == 0) { | |
| 882 // if (md2 < j+1) { | |
| 883 // i += j+1; | |
| 884 // continue outer_loop; | |
| 885 // } | |
| 886 // } | |
| 887 // i += md2; | |
| 888 // continue outer_loop; | |
| 889 // } | |
| 890 // } | |
| 891 // return i - sourceOffset; | |
| 892 // } | |
| 893 // if ((cache & (1 << src)) == 0) { | |
| 894 // i += targetCountLess1; | |
| 895 // } // using "i += targetCount;" and an "else i++;" causes a jump to jump. | |
| 896 // i++; | |
| 897 // } | |
| 898 // return -1; | |
| 899 // } | |
| 900 | |
| 901 //------------------------------string_indexOf------------------------ | |
| 902 Node* LibraryCallKit::string_indexOf(Node* string_object, ciTypeArray* target_array, jint targetOffset_i, | |
| 903 jint cache_i, jint md2_i) { | |
| 904 | |
| 905 Node* no_ctrl = NULL; | |
| 906 float likely = PROB_LIKELY(0.9); | |
| 907 float unlikely = PROB_UNLIKELY(0.9); | |
| 908 | |
| 909 const int value_offset = java_lang_String::value_offset_in_bytes(); | |
| 910 const int count_offset = java_lang_String::count_offset_in_bytes(); | |
| 911 const int offset_offset = java_lang_String::offset_offset_in_bytes(); | |
| 912 | |
| 913 ciInstanceKlass* klass = env()->String_klass(); | |
| 914 const TypeInstPtr* string_type = TypeInstPtr::make(TypePtr::BotPTR, klass, false, NULL, 0); | |
| 915 const TypeAryPtr* source_type = TypeAryPtr::make(TypePtr::NotNull, TypeAry::make(TypeInt::CHAR,TypeInt::POS), ciTypeArrayKlass::make(T_CHAR), true, 0); | |
| 916 | |
| 917 Node* sourceOffseta = basic_plus_adr(string_object, string_object, offset_offset); | |
| 918 Node* sourceOffset = make_load(no_ctrl, sourceOffseta, TypeInt::INT, T_INT, string_type->add_offset(offset_offset)); | |
| 919 Node* sourceCounta = basic_plus_adr(string_object, string_object, count_offset); | |
| 920 Node* sourceCount = make_load(no_ctrl, sourceCounta, TypeInt::INT, T_INT, string_type->add_offset(count_offset)); | |
| 921 Node* sourcea = basic_plus_adr(string_object, string_object, value_offset); | |
| 922 Node* source = make_load(no_ctrl, sourcea, source_type, T_OBJECT, string_type->add_offset(value_offset)); | |
| 923 | |
|
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c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
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163
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changeset
|
924 Node* target = _gvn.transform( makecon(TypeOopPtr::make_from_constant(target_array)) ); |
| 0 | 925 jint target_length = target_array->length(); |
| 926 const TypeAry* target_array_type = TypeAry::make(TypeInt::CHAR, TypeInt::make(0, target_length, Type::WidenMin)); | |
| 927 const TypeAryPtr* target_type = TypeAryPtr::make(TypePtr::BotPTR, target_array_type, target_array->klass(), true, Type::OffsetBot); | |
| 928 | |
| 929 IdealKit kit(gvn(), control(), merged_memory()); | |
| 930 #define __ kit. | |
| 931 Node* zero = __ ConI(0); | |
| 932 Node* one = __ ConI(1); | |
| 933 Node* cache = __ ConI(cache_i); | |
| 934 Node* md2 = __ ConI(md2_i); | |
| 935 Node* lastChar = __ ConI(target_array->char_at(target_length - 1)); | |
| 936 Node* targetCount = __ ConI(target_length); | |
| 937 Node* targetCountLess1 = __ ConI(target_length - 1); | |
| 938 Node* targetOffset = __ ConI(targetOffset_i); | |
| 939 Node* sourceEnd = __ SubI(__ AddI(sourceOffset, sourceCount), targetCountLess1); | |
| 940 | |
| 941 IdealVariable rtn(kit), i(kit), j(kit); __ declares_done(); | |
| 942 Node* outer_loop = __ make_label(2 /* goto */); | |
| 943 Node* return_ = __ make_label(1); | |
| 944 | |
| 945 __ set(rtn,__ ConI(-1)); | |
| 946 __ loop(i, sourceOffset, BoolTest::lt, sourceEnd); { | |
| 947 Node* i2 = __ AddI(__ value(i), targetCountLess1); | |
| 948 // pin to prohibit loading of "next iteration" value which may SEGV (rare) | |
| 949 Node* src = load_array_element(__ ctrl(), source, i2, TypeAryPtr::CHARS); | |
| 950 __ if_then(src, BoolTest::eq, lastChar, unlikely); { | |
| 951 __ loop(j, zero, BoolTest::lt, targetCountLess1); { | |
| 952 Node* tpj = __ AddI(targetOffset, __ value(j)); | |
| 953 Node* targ = load_array_element(no_ctrl, target, tpj, target_type); | |
| 954 Node* ipj = __ AddI(__ value(i), __ value(j)); | |
| 955 Node* src2 = load_array_element(no_ctrl, source, ipj, TypeAryPtr::CHARS); | |
| 956 __ if_then(targ, BoolTest::ne, src2); { | |
| 957 __ if_then(__ AndI(cache, __ LShiftI(one, src2)), BoolTest::eq, zero); { | |
| 958 __ if_then(md2, BoolTest::lt, __ AddI(__ value(j), one)); { | |
| 959 __ increment(i, __ AddI(__ value(j), one)); | |
| 960 __ goto_(outer_loop); | |
| 961 } __ end_if(); __ dead(j); | |
| 962 }__ end_if(); __ dead(j); | |
| 963 __ increment(i, md2); | |
| 964 __ goto_(outer_loop); | |
| 965 }__ end_if(); | |
| 966 __ increment(j, one); | |
| 967 }__ end_loop(); __ dead(j); | |
| 968 __ set(rtn, __ SubI(__ value(i), sourceOffset)); __ dead(i); | |
| 969 __ goto_(return_); | |
| 970 }__ end_if(); | |
| 971 __ if_then(__ AndI(cache, __ LShiftI(one, src)), BoolTest::eq, zero, likely); { | |
| 972 __ increment(i, targetCountLess1); | |
| 973 }__ end_if(); | |
| 974 __ increment(i, one); | |
| 975 __ bind(outer_loop); | |
| 976 }__ end_loop(); __ dead(i); | |
| 977 __ bind(return_); | |
| 978 __ drain_delay_transform(); | |
| 979 | |
| 980 set_control(__ ctrl()); | |
| 981 Node* result = __ value(rtn); | |
| 982 #undef __ | |
| 983 C->set_has_loops(true); | |
| 984 return result; | |
| 985 } | |
| 986 | |
| 987 | |
| 988 //------------------------------inline_string_indexOf------------------------ | |
| 989 bool LibraryCallKit::inline_string_indexOf() { | |
| 990 | |
| 991 _sp += 2; | |
| 992 Node *argument = pop(); // pop non-receiver first: it was pushed second | |
| 993 Node *receiver = pop(); | |
| 994 | |
| 995 // don't intrinsify is argument isn't a constant string. | |
| 996 if (!argument->is_Con()) { | |
| 997 return false; | |
| 998 } | |
| 999 const TypeOopPtr* str_type = _gvn.type(argument)->isa_oopptr(); | |
| 1000 if (str_type == NULL) { | |
| 1001 return false; | |
| 1002 } | |
| 1003 ciInstanceKlass* klass = env()->String_klass(); | |
| 1004 ciObject* str_const = str_type->const_oop(); | |
| 1005 if (str_const == NULL || str_const->klass() != klass) { | |
| 1006 return false; | |
| 1007 } | |
| 1008 ciInstance* str = str_const->as_instance(); | |
| 1009 assert(str != NULL, "must be instance"); | |
| 1010 | |
| 1011 const int value_offset = java_lang_String::value_offset_in_bytes(); | |
| 1012 const int count_offset = java_lang_String::count_offset_in_bytes(); | |
| 1013 const int offset_offset = java_lang_String::offset_offset_in_bytes(); | |
| 1014 | |
| 1015 ciObject* v = str->field_value_by_offset(value_offset).as_object(); | |
| 1016 int o = str->field_value_by_offset(offset_offset).as_int(); | |
| 1017 int c = str->field_value_by_offset(count_offset).as_int(); | |
| 1018 ciTypeArray* pat = v->as_type_array(); // pattern (argument) character array | |
| 1019 | |
| 1020 // constant strings have no offset and count == length which | |
| 1021 // simplifies the resulting code somewhat so lets optimize for that. | |
| 1022 if (o != 0 || c != pat->length()) { | |
| 1023 return false; | |
| 1024 } | |
| 1025 | |
| 1026 // Null check on self without removing any arguments. The argument | |
| 1027 // null check technically happens in the wrong place, which can lead to | |
| 1028 // invalid stack traces when string compare is inlined into a method | |
| 1029 // which handles NullPointerExceptions. | |
| 1030 _sp += 2; | |
| 1031 receiver = do_null_check(receiver, T_OBJECT); | |
| 1032 // No null check on the argument is needed since it's a constant String oop. | |
| 1033 _sp -= 2; | |
| 1034 if (stopped()) { | |
| 1035 return true; | |
| 1036 } | |
| 1037 | |
| 1038 // The null string as a pattern always returns 0 (match at beginning of string) | |
| 1039 if (c == 0) { | |
| 1040 push(intcon(0)); | |
| 1041 return true; | |
| 1042 } | |
| 1043 | |
| 1044 jchar lastChar = pat->char_at(o + (c - 1)); | |
| 1045 int cache = 0; | |
| 1046 int i; | |
| 1047 for (i = 0; i < c - 1; i++) { | |
| 1048 assert(i < pat->length(), "out of range"); | |
| 1049 cache |= (1 << (pat->char_at(o + i) & (sizeof(cache) * BitsPerByte - 1))); | |
| 1050 } | |
| 1051 | |
| 1052 int md2 = c; | |
| 1053 for (i = 0; i < c - 1; i++) { | |
| 1054 assert(i < pat->length(), "out of range"); | |
| 1055 if (pat->char_at(o + i) == lastChar) { | |
| 1056 md2 = (c - 1) - i; | |
| 1057 } | |
| 1058 } | |
| 1059 | |
| 1060 Node* result = string_indexOf(receiver, pat, o, cache, md2); | |
| 1061 push(result); | |
| 1062 return true; | |
| 1063 } | |
| 1064 | |
| 1065 //--------------------------pop_math_arg-------------------------------- | |
| 1066 // Pop a double argument to a math function from the stack | |
| 1067 // rounding it if necessary. | |
| 1068 Node * LibraryCallKit::pop_math_arg() { | |
| 1069 Node *arg = pop_pair(); | |
| 1070 if( Matcher::strict_fp_requires_explicit_rounding && UseSSE<=1 ) | |
| 1071 arg = _gvn.transform( new (C, 2) RoundDoubleNode(0, arg) ); | |
| 1072 return arg; | |
| 1073 } | |
| 1074 | |
| 1075 //------------------------------inline_trig---------------------------------- | |
| 1076 // Inline sin/cos/tan instructions, if possible. If rounding is required, do | |
| 1077 // argument reduction which will turn into a fast/slow diamond. | |
| 1078 bool LibraryCallKit::inline_trig(vmIntrinsics::ID id) { | |
| 1079 _sp += arg_size(); // restore stack pointer | |
| 1080 Node* arg = pop_math_arg(); | |
| 1081 Node* trig = NULL; | |
| 1082 | |
| 1083 switch (id) { | |
| 1084 case vmIntrinsics::_dsin: | |
| 1085 trig = _gvn.transform((Node*)new (C, 2) SinDNode(arg)); | |
| 1086 break; | |
| 1087 case vmIntrinsics::_dcos: | |
| 1088 trig = _gvn.transform((Node*)new (C, 2) CosDNode(arg)); | |
| 1089 break; | |
| 1090 case vmIntrinsics::_dtan: | |
| 1091 trig = _gvn.transform((Node*)new (C, 2) TanDNode(arg)); | |
| 1092 break; | |
| 1093 default: | |
| 1094 assert(false, "bad intrinsic was passed in"); | |
| 1095 return false; | |
| 1096 } | |
| 1097 | |
| 1098 // Rounding required? Check for argument reduction! | |
| 1099 if( Matcher::strict_fp_requires_explicit_rounding ) { | |
| 1100 | |
| 1101 static const double pi_4 = 0.7853981633974483; | |
| 1102 static const double neg_pi_4 = -0.7853981633974483; | |
| 1103 // pi/2 in 80-bit extended precision | |
| 1104 // static const unsigned char pi_2_bits_x[] = {0x35,0xc2,0x68,0x21,0xa2,0xda,0x0f,0xc9,0xff,0x3f,0x00,0x00,0x00,0x00,0x00,0x00}; | |
| 1105 // -pi/2 in 80-bit extended precision | |
| 1106 // 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}; | |
| 1107 // Cutoff value for using this argument reduction technique | |
| 1108 //static const double pi_2_minus_epsilon = 1.564660403643354; | |
| 1109 //static const double neg_pi_2_plus_epsilon = -1.564660403643354; | |
| 1110 | |
| 1111 // Pseudocode for sin: | |
| 1112 // if (x <= Math.PI / 4.0) { | |
| 1113 // if (x >= -Math.PI / 4.0) return fsin(x); | |
| 1114 // if (x >= -Math.PI / 2.0) return -fcos(x + Math.PI / 2.0); | |
| 1115 // } else { | |
| 1116 // if (x <= Math.PI / 2.0) return fcos(x - Math.PI / 2.0); | |
| 1117 // } | |
| 1118 // return StrictMath.sin(x); | |
| 1119 | |
| 1120 // Pseudocode for cos: | |
| 1121 // if (x <= Math.PI / 4.0) { | |
| 1122 // if (x >= -Math.PI / 4.0) return fcos(x); | |
| 1123 // if (x >= -Math.PI / 2.0) return fsin(x + Math.PI / 2.0); | |
| 1124 // } else { | |
| 1125 // if (x <= Math.PI / 2.0) return -fsin(x - Math.PI / 2.0); | |
| 1126 // } | |
| 1127 // return StrictMath.cos(x); | |
| 1128 | |
| 1129 // Actually, sticking in an 80-bit Intel value into C2 will be tough; it | |
| 1130 // requires a special machine instruction to load it. Instead we'll try | |
| 1131 // the 'easy' case. If we really need the extra range +/- PI/2 we'll | |
| 1132 // probably do the math inside the SIN encoding. | |
| 1133 | |
| 1134 // Make the merge point | |
| 1135 RegionNode *r = new (C, 3) RegionNode(3); | |
| 1136 Node *phi = new (C, 3) PhiNode(r,Type::DOUBLE); | |
| 1137 | |
| 1138 // Flatten arg so we need only 1 test | |
| 1139 Node *abs = _gvn.transform(new (C, 2) AbsDNode(arg)); | |
| 1140 // Node for PI/4 constant | |
| 1141 Node *pi4 = makecon(TypeD::make(pi_4)); | |
| 1142 // Check PI/4 : abs(arg) | |
| 1143 Node *cmp = _gvn.transform(new (C, 3) CmpDNode(pi4,abs)); | |
| 1144 // Check: If PI/4 < abs(arg) then go slow | |
| 1145 Node *bol = _gvn.transform( new (C, 2) BoolNode( cmp, BoolTest::lt ) ); | |
| 1146 // Branch either way | |
| 1147 IfNode *iff = create_and_xform_if(control(),bol, PROB_STATIC_FREQUENT, COUNT_UNKNOWN); | |
| 1148 set_control(opt_iff(r,iff)); | |
| 1149 | |
| 1150 // Set fast path result | |
| 1151 phi->init_req(2,trig); | |
| 1152 | |
| 1153 // Slow path - non-blocking leaf call | |
| 1154 Node* call = NULL; | |
| 1155 switch (id) { | |
| 1156 case vmIntrinsics::_dsin: | |
| 1157 call = make_runtime_call(RC_LEAF, OptoRuntime::Math_D_D_Type(), | |
| 1158 CAST_FROM_FN_PTR(address, SharedRuntime::dsin), | |
| 1159 "Sin", NULL, arg, top()); | |
| 1160 break; | |
| 1161 case vmIntrinsics::_dcos: | |
| 1162 call = make_runtime_call(RC_LEAF, OptoRuntime::Math_D_D_Type(), | |
| 1163 CAST_FROM_FN_PTR(address, SharedRuntime::dcos), | |
| 1164 "Cos", NULL, arg, top()); | |
| 1165 break; | |
| 1166 case vmIntrinsics::_dtan: | |
| 1167 call = make_runtime_call(RC_LEAF, OptoRuntime::Math_D_D_Type(), | |
| 1168 CAST_FROM_FN_PTR(address, SharedRuntime::dtan), | |
| 1169 "Tan", NULL, arg, top()); | |
| 1170 break; | |
| 1171 } | |
| 1172 assert(control()->in(0) == call, ""); | |
| 1173 Node* slow_result = _gvn.transform(new (C, 1) ProjNode(call,TypeFunc::Parms)); | |
| 1174 r->init_req(1,control()); | |
| 1175 phi->init_req(1,slow_result); | |
| 1176 | |
| 1177 // Post-merge | |
| 1178 set_control(_gvn.transform(r)); | |
| 1179 record_for_igvn(r); | |
| 1180 trig = _gvn.transform(phi); | |
| 1181 | |
| 1182 C->set_has_split_ifs(true); // Has chance for split-if optimization | |
| 1183 } | |
| 1184 // Push result back on JVM stack | |
| 1185 push_pair(trig); | |
| 1186 return true; | |
| 1187 } | |
| 1188 | |
| 1189 //------------------------------inline_sqrt------------------------------------- | |
| 1190 // Inline square root instruction, if possible. | |
| 1191 bool LibraryCallKit::inline_sqrt(vmIntrinsics::ID id) { | |
| 1192 assert(id == vmIntrinsics::_dsqrt, "Not square root"); | |
| 1193 _sp += arg_size(); // restore stack pointer | |
| 1194 push_pair(_gvn.transform(new (C, 2) SqrtDNode(0, pop_math_arg()))); | |
| 1195 return true; | |
| 1196 } | |
| 1197 | |
| 1198 //------------------------------inline_abs------------------------------------- | |
| 1199 // Inline absolute value instruction, if possible. | |
| 1200 bool LibraryCallKit::inline_abs(vmIntrinsics::ID id) { | |
| 1201 assert(id == vmIntrinsics::_dabs, "Not absolute value"); | |
| 1202 _sp += arg_size(); // restore stack pointer | |
| 1203 push_pair(_gvn.transform(new (C, 2) AbsDNode(pop_math_arg()))); | |
| 1204 return true; | |
| 1205 } | |
| 1206 | |
| 1207 //------------------------------inline_exp------------------------------------- | |
| 1208 // Inline exp instructions, if possible. The Intel hardware only misses | |
| 1209 // really odd corner cases (+/- Infinity). Just uncommon-trap them. | |
| 1210 bool LibraryCallKit::inline_exp(vmIntrinsics::ID id) { | |
| 1211 assert(id == vmIntrinsics::_dexp, "Not exp"); | |
| 1212 | |
| 1213 // If this inlining ever returned NaN in the past, we do not intrinsify it | |
| 1214 // every again. NaN results requires StrictMath.exp handling. | |
| 1215 if (too_many_traps(Deoptimization::Reason_intrinsic)) return false; | |
| 1216 | |
| 1217 // Do not intrinsify on older platforms which lack cmove. | |
| 1218 if (ConditionalMoveLimit == 0) return false; | |
| 1219 | |
| 1220 _sp += arg_size(); // restore stack pointer | |
| 1221 Node *x = pop_math_arg(); | |
| 1222 Node *result = _gvn.transform(new (C, 2) ExpDNode(0,x)); | |
| 1223 | |
| 1224 //------------------- | |
| 1225 //result=(result.isNaN())? StrictMath::exp():result; | |
| 1226 // Check: If isNaN() by checking result!=result? then go to Strict Math | |
| 1227 Node* cmpisnan = _gvn.transform(new (C, 3) CmpDNode(result,result)); | |
| 1228 // Build the boolean node | |
| 1229 Node* bolisnum = _gvn.transform( new (C, 2) BoolNode(cmpisnan, BoolTest::eq) ); | |
| 1230 | |
| 1231 { BuildCutout unless(this, bolisnum, PROB_STATIC_FREQUENT); | |
| 1232 // End the current control-flow path | |
| 1233 push_pair(x); | |
| 1234 // Math.exp intrinsic returned a NaN, which requires StrictMath.exp | |
| 1235 // to handle. Recompile without intrinsifying Math.exp | |
| 1236 uncommon_trap(Deoptimization::Reason_intrinsic, | |
| 1237 Deoptimization::Action_make_not_entrant); | |
| 1238 } | |
| 1239 | |
| 1240 C->set_has_split_ifs(true); // Has chance for split-if optimization | |
| 1241 | |
| 1242 push_pair(result); | |
| 1243 | |
| 1244 return true; | |
| 1245 } | |
| 1246 | |
| 1247 //------------------------------inline_pow------------------------------------- | |
| 1248 // Inline power instructions, if possible. | |
| 1249 bool LibraryCallKit::inline_pow(vmIntrinsics::ID id) { | |
| 1250 assert(id == vmIntrinsics::_dpow, "Not pow"); | |
| 1251 | |
| 1252 // If this inlining ever returned NaN in the past, we do not intrinsify it | |
| 1253 // every again. NaN results requires StrictMath.pow handling. | |
| 1254 if (too_many_traps(Deoptimization::Reason_intrinsic)) return false; | |
| 1255 | |
| 1256 // Do not intrinsify on older platforms which lack cmove. | |
| 1257 if (ConditionalMoveLimit == 0) return false; | |
| 1258 | |
| 1259 // Pseudocode for pow | |
| 1260 // if (x <= 0.0) { | |
| 1261 // if ((double)((int)y)==y) { // if y is int | |
| 1262 // result = ((1&(int)y)==0)?-DPow(abs(x), y):DPow(abs(x), y) | |
| 1263 // } else { | |
| 1264 // result = NaN; | |
| 1265 // } | |
| 1266 // } else { | |
| 1267 // result = DPow(x,y); | |
| 1268 // } | |
| 1269 // if (result != result)? { | |
| 1270 // ucommon_trap(); | |
| 1271 // } | |
| 1272 // return result; | |
| 1273 | |
| 1274 _sp += arg_size(); // restore stack pointer | |
| 1275 Node* y = pop_math_arg(); | |
| 1276 Node* x = pop_math_arg(); | |
| 1277 | |
| 1278 Node *fast_result = _gvn.transform( new (C, 3) PowDNode(0, x, y) ); | |
| 1279 | |
| 1280 // Short form: if not top-level (i.e., Math.pow but inlining Math.pow | |
| 1281 // inside of something) then skip the fancy tests and just check for | |
| 1282 // NaN result. | |
| 1283 Node *result = NULL; | |
| 1284 if( jvms()->depth() >= 1 ) { | |
| 1285 result = fast_result; | |
| 1286 } else { | |
| 1287 | |
| 1288 // Set the merge point for If node with condition of (x <= 0.0) | |
| 1289 // There are four possible paths to region node and phi node | |
| 1290 RegionNode *r = new (C, 4) RegionNode(4); | |
| 1291 Node *phi = new (C, 4) PhiNode(r, Type::DOUBLE); | |
| 1292 | |
| 1293 // Build the first if node: if (x <= 0.0) | |
| 1294 // Node for 0 constant | |
| 1295 Node *zeronode = makecon(TypeD::ZERO); | |
| 1296 // Check x:0 | |
| 1297 Node *cmp = _gvn.transform(new (C, 3) CmpDNode(x, zeronode)); | |
| 1298 // Check: If (x<=0) then go complex path | |
| 1299 Node *bol1 = _gvn.transform( new (C, 2) BoolNode( cmp, BoolTest::le ) ); | |
| 1300 // Branch either way | |
| 1301 IfNode *if1 = create_and_xform_if(control(),bol1, PROB_STATIC_INFREQUENT, COUNT_UNKNOWN); | |
| 1302 Node *opt_test = _gvn.transform(if1); | |
| 1303 //assert( opt_test->is_If(), "Expect an IfNode"); | |
| 1304 IfNode *opt_if1 = (IfNode*)opt_test; | |
| 1305 // Fast path taken; set region slot 3 | |
| 1306 Node *fast_taken = _gvn.transform( new (C, 1) IfFalseNode(opt_if1) ); | |
| 1307 r->init_req(3,fast_taken); // Capture fast-control | |
| 1308 | |
| 1309 // Fast path not-taken, i.e. slow path | |
| 1310 Node *complex_path = _gvn.transform( new (C, 1) IfTrueNode(opt_if1) ); | |
| 1311 | |
| 1312 // Set fast path result | |
| 1313 Node *fast_result = _gvn.transform( new (C, 3) PowDNode(0, y, x) ); | |
| 1314 phi->init_req(3, fast_result); | |
| 1315 | |
| 1316 // Complex path | |
| 1317 // Build the second if node (if y is int) | |
| 1318 // Node for (int)y | |
| 1319 Node *inty = _gvn.transform( new (C, 2) ConvD2INode(y)); | |
| 1320 // Node for (double)((int) y) | |
| 1321 Node *doubleinty= _gvn.transform( new (C, 2) ConvI2DNode(inty)); | |
| 1322 // Check (double)((int) y) : y | |
| 1323 Node *cmpinty= _gvn.transform(new (C, 3) CmpDNode(doubleinty, y)); | |
| 1324 // Check if (y isn't int) then go to slow path | |
| 1325 | |
| 1326 Node *bol2 = _gvn.transform( new (C, 2) BoolNode( cmpinty, BoolTest::ne ) ); | |
| 1327 // Branch eith way | |
| 1328 IfNode *if2 = create_and_xform_if(complex_path,bol2, PROB_STATIC_INFREQUENT, COUNT_UNKNOWN); | |
| 1329 Node *slow_path = opt_iff(r,if2); // Set region path 2 | |
| 1330 | |
| 1331 // Calculate DPow(abs(x), y)*(1 & (int)y) | |
| 1332 // Node for constant 1 | |
| 1333 Node *conone = intcon(1); | |
| 1334 // 1& (int)y | |
| 1335 Node *signnode= _gvn.transform( new (C, 3) AndINode(conone, inty) ); | |
| 1336 // zero node | |
| 1337 Node *conzero = intcon(0); | |
| 1338 // Check (1&(int)y)==0? | |
| 1339 Node *cmpeq1 = _gvn.transform(new (C, 3) CmpINode(signnode, conzero)); | |
| 1340 // Check if (1&(int)y)!=0?, if so the result is negative | |
| 1341 Node *bol3 = _gvn.transform( new (C, 2) BoolNode( cmpeq1, BoolTest::ne ) ); | |
| 1342 // abs(x) | |
| 1343 Node *absx=_gvn.transform( new (C, 2) AbsDNode(x)); | |
| 1344 // abs(x)^y | |
| 1345 Node *absxpowy = _gvn.transform( new (C, 3) PowDNode(0, y, absx) ); | |
| 1346 // -abs(x)^y | |
| 1347 Node *negabsxpowy = _gvn.transform(new (C, 2) NegDNode (absxpowy)); | |
| 1348 // (1&(int)y)==1?-DPow(abs(x), y):DPow(abs(x), y) | |
| 1349 Node *signresult = _gvn.transform( CMoveNode::make(C, NULL, bol3, absxpowy, negabsxpowy, Type::DOUBLE)); | |
| 1350 // Set complex path fast result | |
| 1351 phi->init_req(2, signresult); | |
| 1352 | |
| 1353 static const jlong nan_bits = CONST64(0x7ff8000000000000); | |
| 1354 Node *slow_result = makecon(TypeD::make(*(double*)&nan_bits)); // return NaN | |
| 1355 r->init_req(1,slow_path); | |
| 1356 phi->init_req(1,slow_result); | |
| 1357 | |
| 1358 // Post merge | |
| 1359 set_control(_gvn.transform(r)); | |
| 1360 record_for_igvn(r); | |
| 1361 result=_gvn.transform(phi); | |
| 1362 } | |
| 1363 | |
| 1364 //------------------- | |
| 1365 //result=(result.isNaN())? uncommon_trap():result; | |
| 1366 // Check: If isNaN() by checking result!=result? then go to Strict Math | |
| 1367 Node* cmpisnan = _gvn.transform(new (C, 3) CmpDNode(result,result)); | |
| 1368 // Build the boolean node | |
| 1369 Node* bolisnum = _gvn.transform( new (C, 2) BoolNode(cmpisnan, BoolTest::eq) ); | |
| 1370 | |
| 1371 { BuildCutout unless(this, bolisnum, PROB_STATIC_FREQUENT); | |
| 1372 // End the current control-flow path | |
| 1373 push_pair(x); | |
| 1374 push_pair(y); | |
| 1375 // Math.pow intrinsic returned a NaN, which requires StrictMath.pow | |
| 1376 // to handle. Recompile without intrinsifying Math.pow. | |
| 1377 uncommon_trap(Deoptimization::Reason_intrinsic, | |
| 1378 Deoptimization::Action_make_not_entrant); | |
| 1379 } | |
| 1380 | |
| 1381 C->set_has_split_ifs(true); // Has chance for split-if optimization | |
| 1382 | |
| 1383 push_pair(result); | |
| 1384 | |
| 1385 return true; | |
| 1386 } | |
| 1387 | |
| 1388 //------------------------------inline_trans------------------------------------- | |
| 1389 // Inline transcendental instructions, if possible. The Intel hardware gets | |
| 1390 // these right, no funny corner cases missed. | |
| 1391 bool LibraryCallKit::inline_trans(vmIntrinsics::ID id) { | |
| 1392 _sp += arg_size(); // restore stack pointer | |
| 1393 Node* arg = pop_math_arg(); | |
| 1394 Node* trans = NULL; | |
| 1395 | |
| 1396 switch (id) { | |
| 1397 case vmIntrinsics::_dlog: | |
| 1398 trans = _gvn.transform((Node*)new (C, 2) LogDNode(arg)); | |
| 1399 break; | |
| 1400 case vmIntrinsics::_dlog10: | |
| 1401 trans = _gvn.transform((Node*)new (C, 2) Log10DNode(arg)); | |
| 1402 break; | |
| 1403 default: | |
| 1404 assert(false, "bad intrinsic was passed in"); | |
| 1405 return false; | |
| 1406 } | |
| 1407 | |
| 1408 // Push result back on JVM stack | |
| 1409 push_pair(trans); | |
| 1410 return true; | |
| 1411 } | |
| 1412 | |
| 1413 //------------------------------runtime_math----------------------------- | |
| 1414 bool LibraryCallKit::runtime_math(const TypeFunc* call_type, address funcAddr, const char* funcName) { | |
| 1415 Node* a = NULL; | |
| 1416 Node* b = NULL; | |
| 1417 | |
| 1418 assert(call_type == OptoRuntime::Math_DD_D_Type() || call_type == OptoRuntime::Math_D_D_Type(), | |
| 1419 "must be (DD)D or (D)D type"); | |
| 1420 | |
| 1421 // Inputs | |
| 1422 _sp += arg_size(); // restore stack pointer | |
| 1423 if (call_type == OptoRuntime::Math_DD_D_Type()) { | |
| 1424 b = pop_math_arg(); | |
| 1425 } | |
| 1426 a = pop_math_arg(); | |
| 1427 | |
| 1428 const TypePtr* no_memory_effects = NULL; | |
| 1429 Node* trig = make_runtime_call(RC_LEAF, call_type, funcAddr, funcName, | |
| 1430 no_memory_effects, | |
| 1431 a, top(), b, b ? top() : NULL); | |
| 1432 Node* value = _gvn.transform(new (C, 1) ProjNode(trig, TypeFunc::Parms+0)); | |
| 1433 #ifdef ASSERT | |
| 1434 Node* value_top = _gvn.transform(new (C, 1) ProjNode(trig, TypeFunc::Parms+1)); | |
| 1435 assert(value_top == top(), "second value must be top"); | |
| 1436 #endif | |
| 1437 | |
| 1438 push_pair(value); | |
| 1439 return true; | |
| 1440 } | |
| 1441 | |
| 1442 //------------------------------inline_math_native----------------------------- | |
| 1443 bool LibraryCallKit::inline_math_native(vmIntrinsics::ID id) { | |
| 1444 switch (id) { | |
| 1445 // These intrinsics are not properly supported on all hardware | |
| 1446 case vmIntrinsics::_dcos: return Matcher::has_match_rule(Op_CosD) ? inline_trig(id) : | |
| 1447 runtime_math(OptoRuntime::Math_D_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dcos), "COS"); | |
| 1448 case vmIntrinsics::_dsin: return Matcher::has_match_rule(Op_SinD) ? inline_trig(id) : | |
| 1449 runtime_math(OptoRuntime::Math_D_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dsin), "SIN"); | |
| 1450 case vmIntrinsics::_dtan: return Matcher::has_match_rule(Op_TanD) ? inline_trig(id) : | |
| 1451 runtime_math(OptoRuntime::Math_D_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dtan), "TAN"); | |
| 1452 | |
| 1453 case vmIntrinsics::_dlog: return Matcher::has_match_rule(Op_LogD) ? inline_trans(id) : | |
| 1454 runtime_math(OptoRuntime::Math_D_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dlog), "LOG"); | |
| 1455 case vmIntrinsics::_dlog10: return Matcher::has_match_rule(Op_Log10D) ? inline_trans(id) : | |
| 1456 runtime_math(OptoRuntime::Math_D_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dlog10), "LOG10"); | |
| 1457 | |
| 1458 // These intrinsics are supported on all hardware | |
| 1459 case vmIntrinsics::_dsqrt: return Matcher::has_match_rule(Op_SqrtD) ? inline_sqrt(id) : false; | |
| 1460 case vmIntrinsics::_dabs: return Matcher::has_match_rule(Op_AbsD) ? inline_abs(id) : false; | |
| 1461 | |
| 1462 // These intrinsics don't work on X86. The ad implementation doesn't | |
| 1463 // handle NaN's properly. Instead of returning infinity, the ad | |
| 1464 // implementation returns a NaN on overflow. See bug: 6304089 | |
| 1465 // Once the ad implementations are fixed, change the code below | |
| 1466 // to match the intrinsics above | |
| 1467 | |
| 1468 case vmIntrinsics::_dexp: return | |
| 1469 runtime_math(OptoRuntime::Math_D_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dexp), "EXP"); | |
| 1470 case vmIntrinsics::_dpow: return | |
| 1471 runtime_math(OptoRuntime::Math_DD_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dpow), "POW"); | |
| 1472 | |
| 1473 // These intrinsics are not yet correctly implemented | |
| 1474 case vmIntrinsics::_datan2: | |
| 1475 return false; | |
| 1476 | |
| 1477 default: | |
| 1478 ShouldNotReachHere(); | |
| 1479 return false; | |
| 1480 } | |
| 1481 } | |
| 1482 | |
| 1483 static bool is_simple_name(Node* n) { | |
| 1484 return (n->req() == 1 // constant | |
| 1485 || (n->is_Type() && n->as_Type()->type()->singleton()) | |
| 1486 || n->is_Proj() // parameter or return value | |
| 1487 || n->is_Phi() // local of some sort | |
| 1488 ); | |
| 1489 } | |
| 1490 | |
| 1491 //----------------------------inline_min_max----------------------------------- | |
| 1492 bool LibraryCallKit::inline_min_max(vmIntrinsics::ID id) { | |
| 1493 push(generate_min_max(id, argument(0), argument(1))); | |
| 1494 | |
| 1495 return true; | |
| 1496 } | |
| 1497 | |
| 1498 Node* | |
| 1499 LibraryCallKit::generate_min_max(vmIntrinsics::ID id, Node* x0, Node* y0) { | |
| 1500 // These are the candidate return value: | |
| 1501 Node* xvalue = x0; | |
| 1502 Node* yvalue = y0; | |
| 1503 | |
| 1504 if (xvalue == yvalue) { | |
| 1505 return xvalue; | |
| 1506 } | |
| 1507 | |
| 1508 bool want_max = (id == vmIntrinsics::_max); | |
| 1509 | |
| 1510 const TypeInt* txvalue = _gvn.type(xvalue)->isa_int(); | |
| 1511 const TypeInt* tyvalue = _gvn.type(yvalue)->isa_int(); | |
| 1512 if (txvalue == NULL || tyvalue == NULL) return top(); | |
| 1513 // This is not really necessary, but it is consistent with a | |
| 1514 // hypothetical MaxINode::Value method: | |
| 1515 int widen = MAX2(txvalue->_widen, tyvalue->_widen); | |
| 1516 | |
| 1517 // %%% This folding logic should (ideally) be in a different place. | |
| 1518 // Some should be inside IfNode, and there to be a more reliable | |
| 1519 // transformation of ?: style patterns into cmoves. We also want | |
| 1520 // more powerful optimizations around cmove and min/max. | |
| 1521 | |
| 1522 // Try to find a dominating comparison of these guys. | |
| 1523 // It can simplify the index computation for Arrays.copyOf | |
| 1524 // and similar uses of System.arraycopy. | |
| 1525 // First, compute the normalized version of CmpI(x, y). | |
| 1526 int cmp_op = Op_CmpI; | |
| 1527 Node* xkey = xvalue; | |
| 1528 Node* ykey = yvalue; | |
| 1529 Node* ideal_cmpxy = _gvn.transform( new(C, 3) CmpINode(xkey, ykey) ); | |
| 1530 if (ideal_cmpxy->is_Cmp()) { | |
| 1531 // E.g., if we have CmpI(length - offset, count), | |
| 1532 // it might idealize to CmpI(length, count + offset) | |
| 1533 cmp_op = ideal_cmpxy->Opcode(); | |
| 1534 xkey = ideal_cmpxy->in(1); | |
| 1535 ykey = ideal_cmpxy->in(2); | |
| 1536 } | |
| 1537 | |
| 1538 // Start by locating any relevant comparisons. | |
| 1539 Node* start_from = (xkey->outcnt() < ykey->outcnt()) ? xkey : ykey; | |
| 1540 Node* cmpxy = NULL; | |
| 1541 Node* cmpyx = NULL; | |
| 1542 for (DUIterator_Fast kmax, k = start_from->fast_outs(kmax); k < kmax; k++) { | |
| 1543 Node* cmp = start_from->fast_out(k); | |
| 1544 if (cmp->outcnt() > 0 && // must have prior uses | |
| 1545 cmp->in(0) == NULL && // must be context-independent | |
| 1546 cmp->Opcode() == cmp_op) { // right kind of compare | |
| 1547 if (cmp->in(1) == xkey && cmp->in(2) == ykey) cmpxy = cmp; | |
| 1548 if (cmp->in(1) == ykey && cmp->in(2) == xkey) cmpyx = cmp; | |
| 1549 } | |
| 1550 } | |
| 1551 | |
| 1552 const int NCMPS = 2; | |
| 1553 Node* cmps[NCMPS] = { cmpxy, cmpyx }; | |
| 1554 int cmpn; | |
| 1555 for (cmpn = 0; cmpn < NCMPS; cmpn++) { | |
| 1556 if (cmps[cmpn] != NULL) break; // find a result | |
| 1557 } | |
| 1558 if (cmpn < NCMPS) { | |
| 1559 // Look for a dominating test that tells us the min and max. | |
| 1560 int depth = 0; // Limit search depth for speed | |
| 1561 Node* dom = control(); | |
| 1562 for (; dom != NULL; dom = IfNode::up_one_dom(dom, true)) { | |
| 1563 if (++depth >= 100) break; | |
| 1564 Node* ifproj = dom; | |
| 1565 if (!ifproj->is_Proj()) continue; | |
| 1566 Node* iff = ifproj->in(0); | |
| 1567 if (!iff->is_If()) continue; | |
| 1568 Node* bol = iff->in(1); | |
| 1569 if (!bol->is_Bool()) continue; | |
| 1570 Node* cmp = bol->in(1); | |
| 1571 if (cmp == NULL) continue; | |
| 1572 for (cmpn = 0; cmpn < NCMPS; cmpn++) | |
| 1573 if (cmps[cmpn] == cmp) break; | |
| 1574 if (cmpn == NCMPS) continue; | |
| 1575 BoolTest::mask btest = bol->as_Bool()->_test._test; | |
| 1576 if (ifproj->is_IfFalse()) btest = BoolTest(btest).negate(); | |
| 1577 if (cmp->in(1) == ykey) btest = BoolTest(btest).commute(); | |
| 1578 // At this point, we know that 'x btest y' is true. | |
| 1579 switch (btest) { | |
| 1580 case BoolTest::eq: | |
| 1581 // They are proven equal, so we can collapse the min/max. | |
| 1582 // Either value is the answer. Choose the simpler. | |
| 1583 if (is_simple_name(yvalue) && !is_simple_name(xvalue)) | |
| 1584 return yvalue; | |
| 1585 return xvalue; | |
| 1586 case BoolTest::lt: // x < y | |
| 1587 case BoolTest::le: // x <= y | |
| 1588 return (want_max ? yvalue : xvalue); | |
| 1589 case BoolTest::gt: // x > y | |
| 1590 case BoolTest::ge: // x >= y | |
| 1591 return (want_max ? xvalue : yvalue); | |
| 1592 } | |
| 1593 } | |
| 1594 } | |
| 1595 | |
| 1596 // We failed to find a dominating test. | |
| 1597 // Let's pick a test that might GVN with prior tests. | |
| 1598 Node* best_bol = NULL; | |
| 1599 BoolTest::mask best_btest = BoolTest::illegal; | |
| 1600 for (cmpn = 0; cmpn < NCMPS; cmpn++) { | |
| 1601 Node* cmp = cmps[cmpn]; | |
| 1602 if (cmp == NULL) continue; | |
| 1603 for (DUIterator_Fast jmax, j = cmp->fast_outs(jmax); j < jmax; j++) { | |
| 1604 Node* bol = cmp->fast_out(j); | |
| 1605 if (!bol->is_Bool()) continue; | |
| 1606 BoolTest::mask btest = bol->as_Bool()->_test._test; | |
| 1607 if (btest == BoolTest::eq || btest == BoolTest::ne) continue; | |
| 1608 if (cmp->in(1) == ykey) btest = BoolTest(btest).commute(); | |
| 1609 if (bol->outcnt() > (best_bol == NULL ? 0 : best_bol->outcnt())) { | |
| 1610 best_bol = bol->as_Bool(); | |
| 1611 best_btest = btest; | |
| 1612 } | |
| 1613 } | |
| 1614 } | |
| 1615 | |
| 1616 Node* answer_if_true = NULL; | |
| 1617 Node* answer_if_false = NULL; | |
| 1618 switch (best_btest) { | |
| 1619 default: | |
| 1620 if (cmpxy == NULL) | |
| 1621 cmpxy = ideal_cmpxy; | |
| 1622 best_bol = _gvn.transform( new(C, 2) BoolNode(cmpxy, BoolTest::lt) ); | |
| 1623 // and fall through: | |
| 1624 case BoolTest::lt: // x < y | |
| 1625 case BoolTest::le: // x <= y | |
| 1626 answer_if_true = (want_max ? yvalue : xvalue); | |
| 1627 answer_if_false = (want_max ? xvalue : yvalue); | |
| 1628 break; | |
| 1629 case BoolTest::gt: // x > y | |
| 1630 case BoolTest::ge: // x >= y | |
| 1631 answer_if_true = (want_max ? xvalue : yvalue); | |
| 1632 answer_if_false = (want_max ? yvalue : xvalue); | |
| 1633 break; | |
| 1634 } | |
| 1635 | |
| 1636 jint hi, lo; | |
| 1637 if (want_max) { | |
| 1638 // We can sharpen the minimum. | |
| 1639 hi = MAX2(txvalue->_hi, tyvalue->_hi); | |
| 1640 lo = MAX2(txvalue->_lo, tyvalue->_lo); | |
| 1641 } else { | |
| 1642 // We can sharpen the maximum. | |
| 1643 hi = MIN2(txvalue->_hi, tyvalue->_hi); | |
| 1644 lo = MIN2(txvalue->_lo, tyvalue->_lo); | |
| 1645 } | |
| 1646 | |
| 1647 // Use a flow-free graph structure, to avoid creating excess control edges | |
| 1648 // which could hinder other optimizations. | |
| 1649 // Since Math.min/max is often used with arraycopy, we want | |
| 1650 // tightly_coupled_allocation to be able to see beyond min/max expressions. | |
| 1651 Node* cmov = CMoveNode::make(C, NULL, best_bol, | |
| 1652 answer_if_false, answer_if_true, | |
| 1653 TypeInt::make(lo, hi, widen)); | |
| 1654 | |
| 1655 return _gvn.transform(cmov); | |
| 1656 | |
| 1657 /* | |
| 1658 // This is not as desirable as it may seem, since Min and Max | |
| 1659 // nodes do not have a full set of optimizations. | |
| 1660 // And they would interfere, anyway, with 'if' optimizations | |
| 1661 // and with CMoveI canonical forms. | |
| 1662 switch (id) { | |
| 1663 case vmIntrinsics::_min: | |
| 1664 result_val = _gvn.transform(new (C, 3) MinINode(x,y)); break; | |
| 1665 case vmIntrinsics::_max: | |
| 1666 result_val = _gvn.transform(new (C, 3) MaxINode(x,y)); break; | |
| 1667 default: | |
| 1668 ShouldNotReachHere(); | |
| 1669 } | |
| 1670 */ | |
| 1671 } | |
| 1672 | |
| 1673 inline int | |
| 1674 LibraryCallKit::classify_unsafe_addr(Node* &base, Node* &offset) { | |
| 1675 const TypePtr* base_type = TypePtr::NULL_PTR; | |
| 1676 if (base != NULL) base_type = _gvn.type(base)->isa_ptr(); | |
| 1677 if (base_type == NULL) { | |
| 1678 // Unknown type. | |
| 1679 return Type::AnyPtr; | |
| 1680 } else if (base_type == TypePtr::NULL_PTR) { | |
| 1681 // Since this is a NULL+long form, we have to switch to a rawptr. | |
| 1682 base = _gvn.transform( new (C, 2) CastX2PNode(offset) ); | |
| 1683 offset = MakeConX(0); | |
| 1684 return Type::RawPtr; | |
| 1685 } else if (base_type->base() == Type::RawPtr) { | |
| 1686 return Type::RawPtr; | |
| 1687 } else if (base_type->isa_oopptr()) { | |
| 1688 // Base is never null => always a heap address. | |
| 1689 if (base_type->ptr() == TypePtr::NotNull) { | |
| 1690 return Type::OopPtr; | |
| 1691 } | |
| 1692 // Offset is small => always a heap address. | |
| 1693 const TypeX* offset_type = _gvn.type(offset)->isa_intptr_t(); | |
| 1694 if (offset_type != NULL && | |
| 1695 base_type->offset() == 0 && // (should always be?) | |
| 1696 offset_type->_lo >= 0 && | |
| 1697 !MacroAssembler::needs_explicit_null_check(offset_type->_hi)) { | |
| 1698 return Type::OopPtr; | |
| 1699 } | |
| 1700 // Otherwise, it might either be oop+off or NULL+addr. | |
| 1701 return Type::AnyPtr; | |
| 1702 } else { | |
| 1703 // No information: | |
| 1704 return Type::AnyPtr; | |
| 1705 } | |
| 1706 } | |
| 1707 | |
| 1708 inline Node* LibraryCallKit::make_unsafe_address(Node* base, Node* offset) { | |
| 1709 int kind = classify_unsafe_addr(base, offset); | |
| 1710 if (kind == Type::RawPtr) { | |
| 1711 return basic_plus_adr(top(), base, offset); | |
| 1712 } else { | |
| 1713 return basic_plus_adr(base, offset); | |
| 1714 } | |
| 1715 } | |
| 1716 | |
| 1717 //----------------------------inline_reverseBytes_int/long------------------- | |
| 1718 // inline Int.reverseBytes(int) | |
| 1719 // inline Long.reverseByes(long) | |
| 1720 bool LibraryCallKit::inline_reverseBytes(vmIntrinsics::ID id) { | |
| 1721 assert(id == vmIntrinsics::_reverseBytes_i || id == vmIntrinsics::_reverseBytes_l, "not reverse Bytes"); | |
| 1722 if (id == vmIntrinsics::_reverseBytes_i && !Matcher::has_match_rule(Op_ReverseBytesI)) return false; | |
| 1723 if (id == vmIntrinsics::_reverseBytes_l && !Matcher::has_match_rule(Op_ReverseBytesL)) return false; | |
| 1724 _sp += arg_size(); // restore stack pointer | |
| 1725 switch (id) { | |
| 1726 case vmIntrinsics::_reverseBytes_i: | |
| 1727 push(_gvn.transform(new (C, 2) ReverseBytesINode(0, pop()))); | |
| 1728 break; | |
| 1729 case vmIntrinsics::_reverseBytes_l: | |
| 1730 push_pair(_gvn.transform(new (C, 2) ReverseBytesLNode(0, pop_pair()))); | |
| 1731 break; | |
| 1732 default: | |
| 1733 ; | |
| 1734 } | |
| 1735 return true; | |
| 1736 } | |
| 1737 | |
| 1738 //----------------------------inline_unsafe_access---------------------------- | |
| 1739 | |
| 1740 const static BasicType T_ADDRESS_HOLDER = T_LONG; | |
| 1741 | |
| 1742 // Interpret Unsafe.fieldOffset cookies correctly: | |
| 1743 extern jlong Unsafe_field_offset_to_byte_offset(jlong field_offset); | |
| 1744 | |
| 1745 bool LibraryCallKit::inline_unsafe_access(bool is_native_ptr, bool is_store, BasicType type, bool is_volatile) { | |
| 1746 if (callee()->is_static()) return false; // caller must have the capability! | |
| 1747 | |
| 1748 #ifndef PRODUCT | |
| 1749 { | |
| 1750 ResourceMark rm; | |
| 1751 // Check the signatures. | |
| 1752 ciSignature* sig = signature(); | |
| 1753 #ifdef ASSERT | |
| 1754 if (!is_store) { | |
| 1755 // Object getObject(Object base, int/long offset), etc. | |
| 1756 BasicType rtype = sig->return_type()->basic_type(); | |
| 1757 if (rtype == T_ADDRESS_HOLDER && callee()->name() == ciSymbol::getAddress_name()) | |
| 1758 rtype = T_ADDRESS; // it is really a C void* | |
| 1759 assert(rtype == type, "getter must return the expected value"); | |
| 1760 if (!is_native_ptr) { | |
| 1761 assert(sig->count() == 2, "oop getter has 2 arguments"); | |
| 1762 assert(sig->type_at(0)->basic_type() == T_OBJECT, "getter base is object"); | |
| 1763 assert(sig->type_at(1)->basic_type() == T_LONG, "getter offset is correct"); | |
| 1764 } else { | |
| 1765 assert(sig->count() == 1, "native getter has 1 argument"); | |
| 1766 assert(sig->type_at(0)->basic_type() == T_LONG, "getter base is long"); | |
| 1767 } | |
| 1768 } else { | |
| 1769 // void putObject(Object base, int/long offset, Object x), etc. | |
| 1770 assert(sig->return_type()->basic_type() == T_VOID, "putter must not return a value"); | |
| 1771 if (!is_native_ptr) { | |
| 1772 assert(sig->count() == 3, "oop putter has 3 arguments"); | |
| 1773 assert(sig->type_at(0)->basic_type() == T_OBJECT, "putter base is object"); | |
| 1774 assert(sig->type_at(1)->basic_type() == T_LONG, "putter offset is correct"); | |
| 1775 } else { | |
| 1776 assert(sig->count() == 2, "native putter has 2 arguments"); | |
| 1777 assert(sig->type_at(0)->basic_type() == T_LONG, "putter base is long"); | |
| 1778 } | |
| 1779 BasicType vtype = sig->type_at(sig->count()-1)->basic_type(); | |
| 1780 if (vtype == T_ADDRESS_HOLDER && callee()->name() == ciSymbol::putAddress_name()) | |
| 1781 vtype = T_ADDRESS; // it is really a C void* | |
| 1782 assert(vtype == type, "putter must accept the expected value"); | |
| 1783 } | |
| 1784 #endif // ASSERT | |
| 1785 } | |
| 1786 #endif //PRODUCT | |
| 1787 | |
| 1788 C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe". | |
| 1789 | |
| 1790 int type_words = type2size[ (type == T_ADDRESS) ? T_LONG : type ]; | |
| 1791 | |
| 1792 // Argument words: "this" plus (oop/offset) or (lo/hi) args plus maybe 1 or 2 value words | |
| 1793 int nargs = 1 + (is_native_ptr ? 2 : 3) + (is_store ? type_words : 0); | |
| 1794 | |
| 1795 debug_only(int saved_sp = _sp); | |
| 1796 _sp += nargs; | |
| 1797 | |
| 1798 Node* val; | |
| 1799 debug_only(val = (Node*)(uintptr_t)-1); | |
| 1800 | |
| 1801 | |
| 1802 if (is_store) { | |
| 1803 // Get the value being stored. (Pop it first; it was pushed last.) | |
| 1804 switch (type) { | |
| 1805 case T_DOUBLE: | |
| 1806 case T_LONG: | |
| 1807 case T_ADDRESS: | |
| 1808 val = pop_pair(); | |
| 1809 break; | |
| 1810 default: | |
| 1811 val = pop(); | |
| 1812 } | |
| 1813 } | |
| 1814 | |
| 1815 // Build address expression. See the code in inline_unsafe_prefetch. | |
| 1816 Node *adr; | |
| 1817 Node *heap_base_oop = top(); | |
| 1818 if (!is_native_ptr) { | |
| 1819 // The offset is a value produced by Unsafe.staticFieldOffset or Unsafe.objectFieldOffset | |
| 1820 Node* offset = pop_pair(); | |
| 1821 // The base is either a Java object or a value produced by Unsafe.staticFieldBase | |
| 1822 Node* base = pop(); | |
| 1823 // We currently rely on the cookies produced by Unsafe.xxxFieldOffset | |
| 1824 // to be plain byte offsets, which are also the same as those accepted | |
| 1825 // by oopDesc::field_base. | |
| 1826 assert(Unsafe_field_offset_to_byte_offset(11) == 11, | |
| 1827 "fieldOffset must be byte-scaled"); | |
| 1828 // 32-bit machines ignore the high half! | |
| 1829 offset = ConvL2X(offset); | |
| 1830 adr = make_unsafe_address(base, offset); | |
| 1831 heap_base_oop = base; | |
| 1832 } else { | |
| 1833 Node* ptr = pop_pair(); | |
| 1834 // Adjust Java long to machine word: | |
| 1835 ptr = ConvL2X(ptr); | |
| 1836 adr = make_unsafe_address(NULL, ptr); | |
| 1837 } | |
| 1838 | |
| 1839 // Pop receiver last: it was pushed first. | |
| 1840 Node *receiver = pop(); | |
| 1841 | |
| 1842 assert(saved_sp == _sp, "must have correct argument count"); | |
| 1843 | |
| 1844 const TypePtr *adr_type = _gvn.type(adr)->isa_ptr(); | |
| 1845 | |
| 1846 // First guess at the value type. | |
| 1847 const Type *value_type = Type::get_const_basic_type(type); | |
| 1848 | |
| 1849 // Try to categorize the address. If it comes up as TypeJavaPtr::BOTTOM, | |
| 1850 // there was not enough information to nail it down. | |
| 1851 Compile::AliasType* alias_type = C->alias_type(adr_type); | |
| 1852 assert(alias_type->index() != Compile::AliasIdxBot, "no bare pointers here"); | |
| 1853 | |
| 1854 // We will need memory barriers unless we can determine a unique | |
| 1855 // alias category for this reference. (Note: If for some reason | |
| 1856 // the barriers get omitted and the unsafe reference begins to "pollute" | |
| 1857 // the alias analysis of the rest of the graph, either Compile::can_alias | |
| 1858 // or Compile::must_alias will throw a diagnostic assert.) | |
| 1859 bool need_mem_bar = (alias_type->adr_type() == TypeOopPtr::BOTTOM); | |
| 1860 | |
| 1861 if (!is_store && type == T_OBJECT) { | |
| 1862 // Attempt to infer a sharper value type from the offset and base type. | |
| 1863 ciKlass* sharpened_klass = NULL; | |
| 1864 | |
| 1865 // See if it is an instance field, with an object type. | |
| 1866 if (alias_type->field() != NULL) { | |
| 1867 assert(!is_native_ptr, "native pointer op cannot use a java address"); | |
| 1868 if (alias_type->field()->type()->is_klass()) { | |
| 1869 sharpened_klass = alias_type->field()->type()->as_klass(); | |
| 1870 } | |
| 1871 } | |
| 1872 | |
| 1873 // See if it is a narrow oop array. | |
| 1874 if (adr_type->isa_aryptr()) { | |
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1875 if (adr_type->offset() >= objArrayOopDesc::base_offset_in_bytes(type)) { |
| 0 | 1876 const TypeOopPtr *elem_type = adr_type->is_aryptr()->elem()->isa_oopptr(); |
| 1877 if (elem_type != NULL) { | |
| 1878 sharpened_klass = elem_type->klass(); | |
| 1879 } | |
| 1880 } | |
| 1881 } | |
| 1882 | |
| 1883 if (sharpened_klass != NULL) { | |
| 1884 const TypeOopPtr* tjp = TypeOopPtr::make_from_klass(sharpened_klass); | |
| 1885 | |
| 1886 // Sharpen the value type. | |
| 1887 value_type = tjp; | |
| 1888 | |
| 1889 #ifndef PRODUCT | |
| 1890 if (PrintIntrinsics || PrintInlining || PrintOptoInlining) { | |
| 1891 tty->print(" from base type: "); adr_type->dump(); | |
| 1892 tty->print(" sharpened value: "); value_type->dump(); | |
| 1893 } | |
| 1894 #endif | |
| 1895 } | |
| 1896 } | |
| 1897 | |
| 1898 // Null check on self without removing any arguments. The argument | |
| 1899 // null check technically happens in the wrong place, which can lead to | |
| 1900 // invalid stack traces when the primitive is inlined into a method | |
| 1901 // which handles NullPointerExceptions. | |
| 1902 _sp += nargs; | |
| 1903 do_null_check(receiver, T_OBJECT); | |
| 1904 _sp -= nargs; | |
| 1905 if (stopped()) { | |
| 1906 return true; | |
| 1907 } | |
| 1908 // Heap pointers get a null-check from the interpreter, | |
| 1909 // as a courtesy. However, this is not guaranteed by Unsafe, | |
| 1910 // and it is not possible to fully distinguish unintended nulls | |
| 1911 // from intended ones in this API. | |
| 1912 | |
| 1913 if (is_volatile) { | |
| 1914 // We need to emit leading and trailing CPU membars (see below) in | |
| 1915 // addition to memory membars when is_volatile. This is a little | |
| 1916 // too strong, but avoids the need to insert per-alias-type | |
| 1917 // volatile membars (for stores; compare Parse::do_put_xxx), which | |
| 1918 // we cannot do effctively here because we probably only have a | |
| 1919 // rough approximation of type. | |
| 1920 need_mem_bar = true; | |
| 1921 // For Stores, place a memory ordering barrier now. | |
| 1922 if (is_store) | |
| 1923 insert_mem_bar(Op_MemBarRelease); | |
| 1924 } | |
| 1925 | |
| 1926 // Memory barrier to prevent normal and 'unsafe' accesses from | |
| 1927 // bypassing each other. Happens after null checks, so the | |
| 1928 // exception paths do not take memory state from the memory barrier, | |
| 1929 // so there's no problems making a strong assert about mixing users | |
| 1930 // of safe & unsafe memory. Otherwise fails in a CTW of rt.jar | |
| 1931 // around 5701, class sun/reflect/UnsafeBooleanFieldAccessorImpl. | |
| 1932 if (need_mem_bar) insert_mem_bar(Op_MemBarCPUOrder); | |
| 1933 | |
| 1934 if (!is_store) { | |
| 1935 Node* p = make_load(control(), adr, value_type, type, adr_type, is_volatile); | |
| 1936 // load value and push onto stack | |
| 1937 switch (type) { | |
| 1938 case T_BOOLEAN: | |
| 1939 case T_CHAR: | |
| 1940 case T_BYTE: | |
| 1941 case T_SHORT: | |
| 1942 case T_INT: | |
| 1943 case T_FLOAT: | |
| 1944 case T_OBJECT: | |
| 1945 push( p ); | |
| 1946 break; | |
| 1947 case T_ADDRESS: | |
| 1948 // Cast to an int type. | |
| 1949 p = _gvn.transform( new (C, 2) CastP2XNode(NULL,p) ); | |
| 1950 p = ConvX2L(p); | |
| 1951 push_pair(p); | |
| 1952 break; | |
| 1953 case T_DOUBLE: | |
| 1954 case T_LONG: | |
| 1955 push_pair( p ); | |
| 1956 break; | |
| 1957 default: ShouldNotReachHere(); | |
| 1958 } | |
| 1959 } else { | |
| 1960 // place effect of store into memory | |
| 1961 switch (type) { | |
| 1962 case T_DOUBLE: | |
| 1963 val = dstore_rounding(val); | |
| 1964 break; | |
| 1965 case T_ADDRESS: | |
| 1966 // Repackage the long as a pointer. | |
| 1967 val = ConvL2X(val); | |
| 1968 val = _gvn.transform( new (C, 2) CastX2PNode(val) ); | |
| 1969 break; | |
| 1970 } | |
| 1971 | |
| 1972 if (type != T_OBJECT ) { | |
| 1973 (void) store_to_memory(control(), adr, val, type, adr_type, is_volatile); | |
| 1974 } else { | |
| 1975 // Possibly an oop being stored to Java heap or native memory | |
| 1976 if (!TypePtr::NULL_PTR->higher_equal(_gvn.type(heap_base_oop))) { | |
| 1977 // oop to Java heap. | |
| 1978 (void) store_oop_to_unknown(control(), heap_base_oop, adr, adr_type, val, val->bottom_type(), type); | |
| 1979 } else { | |
| 1980 | |
| 1981 // We can't tell at compile time if we are storing in the Java heap or outside | |
| 1982 // of it. So we need to emit code to conditionally do the proper type of | |
| 1983 // store. | |
| 1984 | |
| 1985 IdealKit kit(gvn(), control(), merged_memory()); | |
| 1986 kit.declares_done(); | |
| 1987 // QQQ who knows what probability is here?? | |
| 1988 kit.if_then(heap_base_oop, BoolTest::ne, null(), PROB_UNLIKELY(0.999)); { | |
| 1989 (void) store_oop_to_unknown(control(), heap_base_oop, adr, adr_type, val, val->bottom_type(), type); | |
| 1990 } kit.else_(); { | |
| 1991 (void) store_to_memory(control(), adr, val, type, adr_type, is_volatile); | |
| 1992 } kit.end_if(); | |
| 1993 } | |
| 1994 } | |
| 1995 } | |
| 1996 | |
| 1997 if (is_volatile) { | |
| 1998 if (!is_store) | |
| 1999 insert_mem_bar(Op_MemBarAcquire); | |
| 2000 else | |
| 2001 insert_mem_bar(Op_MemBarVolatile); | |
| 2002 } | |
| 2003 | |
| 2004 if (need_mem_bar) insert_mem_bar(Op_MemBarCPUOrder); | |
| 2005 | |
| 2006 return true; | |
| 2007 } | |
| 2008 | |
| 2009 //----------------------------inline_unsafe_prefetch---------------------------- | |
| 2010 | |
| 2011 bool LibraryCallKit::inline_unsafe_prefetch(bool is_native_ptr, bool is_store, bool is_static) { | |
| 2012 #ifndef PRODUCT | |
| 2013 { | |
| 2014 ResourceMark rm; | |
| 2015 // Check the signatures. | |
| 2016 ciSignature* sig = signature(); | |
| 2017 #ifdef ASSERT | |
| 2018 // Object getObject(Object base, int/long offset), etc. | |
| 2019 BasicType rtype = sig->return_type()->basic_type(); | |
| 2020 if (!is_native_ptr) { | |
| 2021 assert(sig->count() == 2, "oop prefetch has 2 arguments"); | |
| 2022 assert(sig->type_at(0)->basic_type() == T_OBJECT, "prefetch base is object"); | |
| 2023 assert(sig->type_at(1)->basic_type() == T_LONG, "prefetcha offset is correct"); | |
| 2024 } else { | |
| 2025 assert(sig->count() == 1, "native prefetch has 1 argument"); | |
| 2026 assert(sig->type_at(0)->basic_type() == T_LONG, "prefetch base is long"); | |
| 2027 } | |
| 2028 #endif // ASSERT | |
| 2029 } | |
| 2030 #endif // !PRODUCT | |
| 2031 | |
| 2032 C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe". | |
| 2033 | |
| 2034 // Argument words: "this" if not static, plus (oop/offset) or (lo/hi) args | |
| 2035 int nargs = (is_static ? 0 : 1) + (is_native_ptr ? 2 : 3); | |
| 2036 | |
| 2037 debug_only(int saved_sp = _sp); | |
| 2038 _sp += nargs; | |
| 2039 | |
| 2040 // Build address expression. See the code in inline_unsafe_access. | |
| 2041 Node *adr; | |
| 2042 if (!is_native_ptr) { | |
| 2043 // The offset is a value produced by Unsafe.staticFieldOffset or Unsafe.objectFieldOffset | |
| 2044 Node* offset = pop_pair(); | |
| 2045 // The base is either a Java object or a value produced by Unsafe.staticFieldBase | |
| 2046 Node* base = pop(); | |
| 2047 // We currently rely on the cookies produced by Unsafe.xxxFieldOffset | |
| 2048 // to be plain byte offsets, which are also the same as those accepted | |
| 2049 // by oopDesc::field_base. | |
| 2050 assert(Unsafe_field_offset_to_byte_offset(11) == 11, | |
| 2051 "fieldOffset must be byte-scaled"); | |
| 2052 // 32-bit machines ignore the high half! | |
| 2053 offset = ConvL2X(offset); | |
| 2054 adr = make_unsafe_address(base, offset); | |
| 2055 } else { | |
| 2056 Node* ptr = pop_pair(); | |
| 2057 // Adjust Java long to machine word: | |
| 2058 ptr = ConvL2X(ptr); | |
| 2059 adr = make_unsafe_address(NULL, ptr); | |
| 2060 } | |
| 2061 | |
| 2062 if (is_static) { | |
| 2063 assert(saved_sp == _sp, "must have correct argument count"); | |
| 2064 } else { | |
| 2065 // Pop receiver last: it was pushed first. | |
| 2066 Node *receiver = pop(); | |
| 2067 assert(saved_sp == _sp, "must have correct argument count"); | |
| 2068 | |
| 2069 // Null check on self without removing any arguments. The argument | |
| 2070 // null check technically happens in the wrong place, which can lead to | |
| 2071 // invalid stack traces when the primitive is inlined into a method | |
| 2072 // which handles NullPointerExceptions. | |
| 2073 _sp += nargs; | |
| 2074 do_null_check(receiver, T_OBJECT); | |
| 2075 _sp -= nargs; | |
| 2076 if (stopped()) { | |
| 2077 return true; | |
| 2078 } | |
| 2079 } | |
| 2080 | |
| 2081 // Generate the read or write prefetch | |
| 2082 Node *prefetch; | |
| 2083 if (is_store) { | |
| 2084 prefetch = new (C, 3) PrefetchWriteNode(i_o(), adr); | |
| 2085 } else { | |
| 2086 prefetch = new (C, 3) PrefetchReadNode(i_o(), adr); | |
| 2087 } | |
| 2088 prefetch->init_req(0, control()); | |
| 2089 set_i_o(_gvn.transform(prefetch)); | |
| 2090 | |
| 2091 return true; | |
| 2092 } | |
| 2093 | |
| 2094 //----------------------------inline_unsafe_CAS---------------------------- | |
| 2095 | |
| 2096 bool LibraryCallKit::inline_unsafe_CAS(BasicType type) { | |
| 2097 // This basic scheme here is the same as inline_unsafe_access, but | |
| 2098 // differs in enough details that combining them would make the code | |
| 2099 // overly confusing. (This is a true fact! I originally combined | |
| 2100 // them, but even I was confused by it!) As much code/comments as | |
| 2101 // possible are retained from inline_unsafe_access though to make | |
| 2102 // the correspondances clearer. - dl | |
| 2103 | |
| 2104 if (callee()->is_static()) return false; // caller must have the capability! | |
| 2105 | |
| 2106 #ifndef PRODUCT | |
| 2107 { | |
| 2108 ResourceMark rm; | |
| 2109 // Check the signatures. | |
| 2110 ciSignature* sig = signature(); | |
| 2111 #ifdef ASSERT | |
| 2112 BasicType rtype = sig->return_type()->basic_type(); | |
| 2113 assert(rtype == T_BOOLEAN, "CAS must return boolean"); | |
| 2114 assert(sig->count() == 4, "CAS has 4 arguments"); | |
| 2115 assert(sig->type_at(0)->basic_type() == T_OBJECT, "CAS base is object"); | |
| 2116 assert(sig->type_at(1)->basic_type() == T_LONG, "CAS offset is long"); | |
| 2117 #endif // ASSERT | |
| 2118 } | |
| 2119 #endif //PRODUCT | |
| 2120 | |
| 2121 // number of stack slots per value argument (1 or 2) | |
| 2122 int type_words = type2size[type]; | |
| 2123 | |
| 2124 // Cannot inline wide CAS on machines that don't support it natively | |
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2125 if (type2aelembytes(type) > BytesPerInt && !VM_Version::supports_cx8()) |
| 0 | 2126 return false; |
| 2127 | |
| 2128 C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe". | |
| 2129 | |
| 2130 // Argument words: "this" plus oop plus offset plus oldvalue plus newvalue; | |
| 2131 int nargs = 1 + 1 + 2 + type_words + type_words; | |
| 2132 | |
| 2133 // pop arguments: newval, oldval, offset, base, and receiver | |
| 2134 debug_only(int saved_sp = _sp); | |
| 2135 _sp += nargs; | |
| 2136 Node* newval = (type_words == 1) ? pop() : pop_pair(); | |
| 2137 Node* oldval = (type_words == 1) ? pop() : pop_pair(); | |
| 2138 Node *offset = pop_pair(); | |
| 2139 Node *base = pop(); | |
| 2140 Node *receiver = pop(); | |
| 2141 assert(saved_sp == _sp, "must have correct argument count"); | |
| 2142 | |
| 2143 // Null check receiver. | |
| 2144 _sp += nargs; | |
| 2145 do_null_check(receiver, T_OBJECT); | |
| 2146 _sp -= nargs; | |
| 2147 if (stopped()) { | |
| 2148 return true; | |
| 2149 } | |
| 2150 | |
| 2151 // Build field offset expression. | |
| 2152 // We currently rely on the cookies produced by Unsafe.xxxFieldOffset | |
| 2153 // to be plain byte offsets, which are also the same as those accepted | |
| 2154 // by oopDesc::field_base. | |
| 2155 assert(Unsafe_field_offset_to_byte_offset(11) == 11, "fieldOffset must be byte-scaled"); | |
| 2156 // 32-bit machines ignore the high half of long offsets | |
| 2157 offset = ConvL2X(offset); | |
| 2158 Node* adr = make_unsafe_address(base, offset); | |
| 2159 const TypePtr *adr_type = _gvn.type(adr)->isa_ptr(); | |
| 2160 | |
| 2161 // (Unlike inline_unsafe_access, there seems no point in trying | |
| 2162 // to refine types. Just use the coarse types here. | |
| 2163 const Type *value_type = Type::get_const_basic_type(type); | |
| 2164 Compile::AliasType* alias_type = C->alias_type(adr_type); | |
| 2165 assert(alias_type->index() != Compile::AliasIdxBot, "no bare pointers here"); | |
| 2166 int alias_idx = C->get_alias_index(adr_type); | |
| 2167 | |
| 2168 // Memory-model-wise, a CAS acts like a little synchronized block, | |
| 2169 // so needs barriers on each side. These don't't translate into | |
| 2170 // actual barriers on most machines, but we still need rest of | |
| 2171 // compiler to respect ordering. | |
| 2172 | |
| 2173 insert_mem_bar(Op_MemBarRelease); | |
| 2174 insert_mem_bar(Op_MemBarCPUOrder); | |
| 2175 | |
| 2176 // 4984716: MemBars must be inserted before this | |
| 2177 // memory node in order to avoid a false | |
| 2178 // dependency which will confuse the scheduler. | |
| 2179 Node *mem = memory(alias_idx); | |
| 2180 | |
| 2181 // For now, we handle only those cases that actually exist: ints, | |
| 2182 // longs, and Object. Adding others should be straightforward. | |
| 2183 Node* cas; | |
| 2184 switch(type) { | |
| 2185 case T_INT: | |
| 2186 cas = _gvn.transform(new (C, 5) CompareAndSwapINode(control(), mem, adr, newval, oldval)); | |
| 2187 break; | |
| 2188 case T_LONG: | |
| 2189 cas = _gvn.transform(new (C, 5) CompareAndSwapLNode(control(), mem, adr, newval, oldval)); | |
| 2190 break; | |
| 2191 case T_OBJECT: | |
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2192 // reference stores need a store barrier. |
| 0 | 2193 // (They don't if CAS fails, but it isn't worth checking.) |
| 2194 pre_barrier(control(), base, adr, alias_idx, newval, value_type, T_OBJECT); | |
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2195 #ifdef _LP64 |
| 163 | 2196 if (adr->bottom_type()->is_ptr_to_narrowoop()) { |
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2197 Node *newval_enc = _gvn.transform(new (C, 2) EncodePNode(newval, newval->bottom_type()->make_narrowoop())); |
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2198 Node *oldval_enc = _gvn.transform(new (C, 2) EncodePNode(oldval, oldval->bottom_type()->make_narrowoop())); |
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2199 cas = _gvn.transform(new (C, 5) CompareAndSwapNNode(control(), mem, adr, |
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2200 newval_enc, oldval_enc)); |
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2201 } else |
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2202 #endif |
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2203 { |
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2204 cas = _gvn.transform(new (C, 5) CompareAndSwapPNode(control(), mem, adr, newval, oldval)); |
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2205 } |
| 0 | 2206 post_barrier(control(), cas, base, adr, alias_idx, newval, T_OBJECT, true); |
| 2207 break; | |
| 2208 default: | |
| 2209 ShouldNotReachHere(); | |
| 2210 break; | |
| 2211 } | |
| 2212 | |
| 2213 // SCMemProjNodes represent the memory state of CAS. Their main | |
| 2214 // role is to prevent CAS nodes from being optimized away when their | |
| 2215 // results aren't used. | |
| 2216 Node* proj = _gvn.transform( new (C, 1) SCMemProjNode(cas)); | |
| 2217 set_memory(proj, alias_idx); | |
| 2218 | |
| 2219 // Add the trailing membar surrounding the access | |
| 2220 insert_mem_bar(Op_MemBarCPUOrder); | |
| 2221 insert_mem_bar(Op_MemBarAcquire); | |
| 2222 | |
| 2223 push(cas); | |
| 2224 return true; | |
| 2225 } | |
| 2226 | |
| 2227 bool LibraryCallKit::inline_unsafe_ordered_store(BasicType type) { | |
| 2228 // This is another variant of inline_unsafe_access, differing in | |
| 2229 // that it always issues store-store ("release") barrier and ensures | |
| 2230 // store-atomicity (which only matters for "long"). | |
| 2231 | |
| 2232 if (callee()->is_static()) return false; // caller must have the capability! | |
| 2233 | |
| 2234 #ifndef PRODUCT | |
| 2235 { | |
| 2236 ResourceMark rm; | |
| 2237 // Check the signatures. | |
| 2238 ciSignature* sig = signature(); | |
| 2239 #ifdef ASSERT | |
| 2240 BasicType rtype = sig->return_type()->basic_type(); | |
| 2241 assert(rtype == T_VOID, "must return void"); | |
| 2242 assert(sig->count() == 3, "has 3 arguments"); | |
| 2243 assert(sig->type_at(0)->basic_type() == T_OBJECT, "base is object"); | |
| 2244 assert(sig->type_at(1)->basic_type() == T_LONG, "offset is long"); | |
| 2245 #endif // ASSERT | |
| 2246 } | |
| 2247 #endif //PRODUCT | |
| 2248 | |
| 2249 // number of stack slots per value argument (1 or 2) | |
| 2250 int type_words = type2size[type]; | |
| 2251 | |
| 2252 C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe". | |
| 2253 | |
| 2254 // Argument words: "this" plus oop plus offset plus value; | |
| 2255 int nargs = 1 + 1 + 2 + type_words; | |
| 2256 | |
| 2257 // pop arguments: val, offset, base, and receiver | |
| 2258 debug_only(int saved_sp = _sp); | |
| 2259 _sp += nargs; | |
| 2260 Node* val = (type_words == 1) ? pop() : pop_pair(); | |
| 2261 Node *offset = pop_pair(); | |
| 2262 Node *base = pop(); | |
| 2263 Node *receiver = pop(); | |
| 2264 assert(saved_sp == _sp, "must have correct argument count"); | |
| 2265 | |
| 2266 // Null check receiver. | |
| 2267 _sp += nargs; | |
| 2268 do_null_check(receiver, T_OBJECT); | |
| 2269 _sp -= nargs; | |
| 2270 if (stopped()) { | |
| 2271 return true; | |
| 2272 } | |
| 2273 | |
| 2274 // Build field offset expression. | |
| 2275 assert(Unsafe_field_offset_to_byte_offset(11) == 11, "fieldOffset must be byte-scaled"); | |
| 2276 // 32-bit machines ignore the high half of long offsets | |
| 2277 offset = ConvL2X(offset); | |
| 2278 Node* adr = make_unsafe_address(base, offset); | |
| 2279 const TypePtr *adr_type = _gvn.type(adr)->isa_ptr(); | |
| 2280 const Type *value_type = Type::get_const_basic_type(type); | |
| 2281 Compile::AliasType* alias_type = C->alias_type(adr_type); | |
| 2282 | |
| 2283 insert_mem_bar(Op_MemBarRelease); | |
| 2284 insert_mem_bar(Op_MemBarCPUOrder); | |
| 2285 // Ensure that the store is atomic for longs: | |
| 2286 bool require_atomic_access = true; | |
| 2287 Node* store; | |
| 2288 if (type == T_OBJECT) // reference stores need a store barrier. | |
| 2289 store = store_oop_to_unknown(control(), base, adr, adr_type, val, value_type, type); | |
| 2290 else { | |
| 2291 store = store_to_memory(control(), adr, val, type, adr_type, require_atomic_access); | |
| 2292 } | |
| 2293 insert_mem_bar(Op_MemBarCPUOrder); | |
| 2294 return true; | |
| 2295 } | |
| 2296 | |
| 2297 bool LibraryCallKit::inline_unsafe_allocate() { | |
| 2298 if (callee()->is_static()) return false; // caller must have the capability! | |
| 2299 int nargs = 1 + 1; | |
| 2300 assert(signature()->size() == nargs-1, "alloc has 1 argument"); | |
| 2301 null_check_receiver(callee()); // check then ignore argument(0) | |
| 2302 _sp += nargs; // set original stack for use by uncommon_trap | |
| 2303 Node* cls = do_null_check(argument(1), T_OBJECT); | |
| 2304 _sp -= nargs; | |
| 2305 if (stopped()) return true; | |
| 2306 | |
| 2307 Node* kls = load_klass_from_mirror(cls, false, nargs, NULL, 0); | |
| 2308 _sp += nargs; // set original stack for use by uncommon_trap | |
| 2309 kls = do_null_check(kls, T_OBJECT); | |
| 2310 _sp -= nargs; | |
| 2311 if (stopped()) return true; // argument was like int.class | |
| 2312 | |
| 2313 // Note: The argument might still be an illegal value like | |
| 2314 // Serializable.class or Object[].class. The runtime will handle it. | |
| 2315 // But we must make an explicit check for initialization. | |
| 2316 Node* insp = basic_plus_adr(kls, instanceKlass::init_state_offset_in_bytes() + sizeof(oopDesc)); | |
| 2317 Node* inst = make_load(NULL, insp, TypeInt::INT, T_INT); | |
| 2318 Node* bits = intcon(instanceKlass::fully_initialized); | |
| 2319 Node* test = _gvn.transform( new (C, 3) SubINode(inst, bits) ); | |
| 2320 // The 'test' is non-zero if we need to take a slow path. | |
| 2321 | |
| 2322 Node* obj = new_instance(kls, test); | |
| 2323 push(obj); | |
| 2324 | |
| 2325 return true; | |
| 2326 } | |
| 2327 | |
| 2328 //------------------------inline_native_time_funcs-------------- | |
| 2329 // inline code for System.currentTimeMillis() and System.nanoTime() | |
| 2330 // these have the same type and signature | |
| 2331 bool LibraryCallKit::inline_native_time_funcs(bool isNano) { | |
| 2332 address funcAddr = isNano ? CAST_FROM_FN_PTR(address, os::javaTimeNanos) : | |
| 2333 CAST_FROM_FN_PTR(address, os::javaTimeMillis); | |
| 2334 const char * funcName = isNano ? "nanoTime" : "currentTimeMillis"; | |
| 2335 const TypeFunc *tf = OptoRuntime::current_time_millis_Type(); | |
| 2336 const TypePtr* no_memory_effects = NULL; | |
| 2337 Node* time = make_runtime_call(RC_LEAF, tf, funcAddr, funcName, no_memory_effects); | |
| 2338 Node* value = _gvn.transform(new (C, 1) ProjNode(time, TypeFunc::Parms+0)); | |
| 2339 #ifdef ASSERT | |
| 2340 Node* value_top = _gvn.transform(new (C, 1) ProjNode(time, TypeFunc::Parms + 1)); | |
| 2341 assert(value_top == top(), "second value must be top"); | |
| 2342 #endif | |
| 2343 push_pair(value); | |
| 2344 return true; | |
| 2345 } | |
| 2346 | |
| 2347 //------------------------inline_native_currentThread------------------ | |
| 2348 bool LibraryCallKit::inline_native_currentThread() { | |
| 2349 Node* junk = NULL; | |
| 2350 push(generate_current_thread(junk)); | |
| 2351 return true; | |
| 2352 } | |
| 2353 | |
| 2354 //------------------------inline_native_isInterrupted------------------ | |
| 2355 bool LibraryCallKit::inline_native_isInterrupted() { | |
| 2356 const int nargs = 1+1; // receiver + boolean | |
| 2357 assert(nargs == arg_size(), "sanity"); | |
| 2358 // Add a fast path to t.isInterrupted(clear_int): | |
| 2359 // (t == Thread.current() && (!TLS._osthread._interrupted || !clear_int)) | |
| 2360 // ? TLS._osthread._interrupted : /*slow path:*/ t.isInterrupted(clear_int) | |
| 2361 // So, in the common case that the interrupt bit is false, | |
| 2362 // we avoid making a call into the VM. Even if the interrupt bit | |
| 2363 // is true, if the clear_int argument is false, we avoid the VM call. | |
| 2364 // However, if the receiver is not currentThread, we must call the VM, | |
| 2365 // because there must be some locking done around the operation. | |
| 2366 | |
| 2367 // We only go to the fast case code if we pass two guards. | |
| 2368 // Paths which do not pass are accumulated in the slow_region. | |
| 2369 RegionNode* slow_region = new (C, 1) RegionNode(1); | |
| 2370 record_for_igvn(slow_region); | |
| 2371 RegionNode* result_rgn = new (C, 4) RegionNode(1+3); // fast1, fast2, slow | |
| 2372 PhiNode* result_val = new (C, 4) PhiNode(result_rgn, TypeInt::BOOL); | |
| 2373 enum { no_int_result_path = 1, | |
| 2374 no_clear_result_path = 2, | |
| 2375 slow_result_path = 3 | |
| 2376 }; | |
| 2377 | |
| 2378 // (a) Receiving thread must be the current thread. | |
| 2379 Node* rec_thr = argument(0); | |
| 2380 Node* tls_ptr = NULL; | |
| 2381 Node* cur_thr = generate_current_thread(tls_ptr); | |
| 2382 Node* cmp_thr = _gvn.transform( new (C, 3) CmpPNode(cur_thr, rec_thr) ); | |
| 2383 Node* bol_thr = _gvn.transform( new (C, 2) BoolNode(cmp_thr, BoolTest::ne) ); | |
| 2384 | |
| 2385 bool known_current_thread = (_gvn.type(bol_thr) == TypeInt::ZERO); | |
| 2386 if (!known_current_thread) | |
| 2387 generate_slow_guard(bol_thr, slow_region); | |
| 2388 | |
| 2389 // (b) Interrupt bit on TLS must be false. | |
| 2390 Node* p = basic_plus_adr(top()/*!oop*/, tls_ptr, in_bytes(JavaThread::osthread_offset())); | |
| 2391 Node* osthread = make_load(NULL, p, TypeRawPtr::NOTNULL, T_ADDRESS); | |
| 2392 p = basic_plus_adr(top()/*!oop*/, osthread, in_bytes(OSThread::interrupted_offset())); | |
| 2393 Node* int_bit = make_load(NULL, p, TypeInt::BOOL, T_INT); | |
| 2394 Node* cmp_bit = _gvn.transform( new (C, 3) CmpINode(int_bit, intcon(0)) ); | |
| 2395 Node* bol_bit = _gvn.transform( new (C, 2) BoolNode(cmp_bit, BoolTest::ne) ); | |
| 2396 | |
| 2397 IfNode* iff_bit = create_and_map_if(control(), bol_bit, PROB_UNLIKELY_MAG(3), COUNT_UNKNOWN); | |
| 2398 | |
| 2399 // First fast path: if (!TLS._interrupted) return false; | |
| 2400 Node* false_bit = _gvn.transform( new (C, 1) IfFalseNode(iff_bit) ); | |
| 2401 result_rgn->init_req(no_int_result_path, false_bit); | |
| 2402 result_val->init_req(no_int_result_path, intcon(0)); | |
| 2403 | |
| 2404 // drop through to next case | |
| 2405 set_control( _gvn.transform(new (C, 1) IfTrueNode(iff_bit)) ); | |
| 2406 | |
| 2407 // (c) Or, if interrupt bit is set and clear_int is false, use 2nd fast path. | |
| 2408 Node* clr_arg = argument(1); | |
| 2409 Node* cmp_arg = _gvn.transform( new (C, 3) CmpINode(clr_arg, intcon(0)) ); | |
| 2410 Node* bol_arg = _gvn.transform( new (C, 2) BoolNode(cmp_arg, BoolTest::ne) ); | |
| 2411 IfNode* iff_arg = create_and_map_if(control(), bol_arg, PROB_FAIR, COUNT_UNKNOWN); | |
| 2412 | |
| 2413 // Second fast path: ... else if (!clear_int) return true; | |
| 2414 Node* false_arg = _gvn.transform( new (C, 1) IfFalseNode(iff_arg) ); | |
| 2415 result_rgn->init_req(no_clear_result_path, false_arg); | |
| 2416 result_val->init_req(no_clear_result_path, intcon(1)); | |
| 2417 | |
| 2418 // drop through to next case | |
| 2419 set_control( _gvn.transform(new (C, 1) IfTrueNode(iff_arg)) ); | |
| 2420 | |
| 2421 // (d) Otherwise, go to the slow path. | |
| 2422 slow_region->add_req(control()); | |
| 2423 set_control( _gvn.transform(slow_region) ); | |
| 2424 | |
| 2425 if (stopped()) { | |
| 2426 // There is no slow path. | |
| 2427 result_rgn->init_req(slow_result_path, top()); | |
| 2428 result_val->init_req(slow_result_path, top()); | |
| 2429 } else { | |
| 2430 // non-virtual because it is a private non-static | |
| 2431 CallJavaNode* slow_call = generate_method_call(vmIntrinsics::_isInterrupted); | |
| 2432 | |
| 2433 Node* slow_val = set_results_for_java_call(slow_call); | |
| 2434 // this->control() comes from set_results_for_java_call | |
| 2435 | |
| 2436 // If we know that the result of the slow call will be true, tell the optimizer! | |
| 2437 if (known_current_thread) slow_val = intcon(1); | |
| 2438 | |
| 2439 Node* fast_io = slow_call->in(TypeFunc::I_O); | |
| 2440 Node* fast_mem = slow_call->in(TypeFunc::Memory); | |
| 2441 // These two phis are pre-filled with copies of of the fast IO and Memory | |
| 2442 Node* io_phi = PhiNode::make(result_rgn, fast_io, Type::ABIO); | |
| 2443 Node* mem_phi = PhiNode::make(result_rgn, fast_mem, Type::MEMORY, TypePtr::BOTTOM); | |
| 2444 | |
| 2445 result_rgn->init_req(slow_result_path, control()); | |
| 2446 io_phi ->init_req(slow_result_path, i_o()); | |
| 2447 mem_phi ->init_req(slow_result_path, reset_memory()); | |
| 2448 result_val->init_req(slow_result_path, slow_val); | |
| 2449 | |
| 2450 set_all_memory( _gvn.transform(mem_phi) ); | |
| 2451 set_i_o( _gvn.transform(io_phi) ); | |
| 2452 } | |
| 2453 | |
| 2454 push_result(result_rgn, result_val); | |
| 2455 C->set_has_split_ifs(true); // Has chance for split-if optimization | |
| 2456 | |
| 2457 return true; | |
| 2458 } | |
| 2459 | |
| 2460 //---------------------------load_mirror_from_klass---------------------------- | |
| 2461 // Given a klass oop, load its java mirror (a java.lang.Class oop). | |
| 2462 Node* LibraryCallKit::load_mirror_from_klass(Node* klass) { | |
| 2463 Node* p = basic_plus_adr(klass, Klass::java_mirror_offset_in_bytes() + sizeof(oopDesc)); | |
| 2464 return make_load(NULL, p, TypeInstPtr::MIRROR, T_OBJECT); | |
| 2465 } | |
| 2466 | |
| 2467 //-----------------------load_klass_from_mirror_common------------------------- | |
| 2468 // Given a java mirror (a java.lang.Class oop), load its corresponding klass oop. | |
| 2469 // Test the klass oop for null (signifying a primitive Class like Integer.TYPE), | |
| 2470 // and branch to the given path on the region. | |
| 2471 // If never_see_null, take an uncommon trap on null, so we can optimistically | |
| 2472 // compile for the non-null case. | |
| 2473 // If the region is NULL, force never_see_null = true. | |
| 2474 Node* LibraryCallKit::load_klass_from_mirror_common(Node* mirror, | |
| 2475 bool never_see_null, | |
| 2476 int nargs, | |
| 2477 RegionNode* region, | |
| 2478 int null_path, | |
| 2479 int offset) { | |
| 2480 if (region == NULL) never_see_null = true; | |
| 2481 Node* p = basic_plus_adr(mirror, offset); | |
| 2482 const TypeKlassPtr* kls_type = TypeKlassPtr::OBJECT_OR_NULL; | |
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2483 Node* kls = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeRawPtr::BOTTOM, kls_type) ); |
| 0 | 2484 _sp += nargs; // any deopt will start just before call to enclosing method |
| 2485 Node* null_ctl = top(); | |
| 2486 kls = null_check_oop(kls, &null_ctl, never_see_null); | |
| 2487 if (region != NULL) { | |
| 2488 // Set region->in(null_path) if the mirror is a primitive (e.g, int.class). | |
| 2489 region->init_req(null_path, null_ctl); | |
| 2490 } else { | |
| 2491 assert(null_ctl == top(), "no loose ends"); | |
| 2492 } | |
| 2493 _sp -= nargs; | |
| 2494 return kls; | |
| 2495 } | |
| 2496 | |
| 2497 //--------------------(inline_native_Class_query helpers)--------------------- | |
| 2498 // Use this for JVM_ACC_INTERFACE, JVM_ACC_IS_CLONEABLE, JVM_ACC_HAS_FINALIZER. | |
| 2499 // Fall through if (mods & mask) == bits, take the guard otherwise. | |
| 2500 Node* LibraryCallKit::generate_access_flags_guard(Node* kls, int modifier_mask, int modifier_bits, RegionNode* region) { | |
| 2501 // Branch around if the given klass has the given modifier bit set. | |
| 2502 // Like generate_guard, adds a new path onto the region. | |
| 2503 Node* modp = basic_plus_adr(kls, Klass::access_flags_offset_in_bytes() + sizeof(oopDesc)); | |
| 2504 Node* mods = make_load(NULL, modp, TypeInt::INT, T_INT); | |
| 2505 Node* mask = intcon(modifier_mask); | |
| 2506 Node* bits = intcon(modifier_bits); | |
| 2507 Node* mbit = _gvn.transform( new (C, 3) AndINode(mods, mask) ); | |
| 2508 Node* cmp = _gvn.transform( new (C, 3) CmpINode(mbit, bits) ); | |
| 2509 Node* bol = _gvn.transform( new (C, 2) BoolNode(cmp, BoolTest::ne) ); | |
| 2510 return generate_fair_guard(bol, region); | |
| 2511 } | |
| 2512 Node* LibraryCallKit::generate_interface_guard(Node* kls, RegionNode* region) { | |
| 2513 return generate_access_flags_guard(kls, JVM_ACC_INTERFACE, 0, region); | |
| 2514 } | |
| 2515 | |
| 2516 //-------------------------inline_native_Class_query------------------- | |
| 2517 bool LibraryCallKit::inline_native_Class_query(vmIntrinsics::ID id) { | |
| 2518 int nargs = 1+0; // just the Class mirror, in most cases | |
| 2519 const Type* return_type = TypeInt::BOOL; | |
| 2520 Node* prim_return_value = top(); // what happens if it's a primitive class? | |
| 2521 bool never_see_null = !too_many_traps(Deoptimization::Reason_null_check); | |
| 2522 bool expect_prim = false; // most of these guys expect to work on refs | |
| 2523 | |
| 2524 enum { _normal_path = 1, _prim_path = 2, PATH_LIMIT }; | |
| 2525 | |
| 2526 switch (id) { | |
| 2527 case vmIntrinsics::_isInstance: | |
| 2528 nargs = 1+1; // the Class mirror, plus the object getting queried about | |
| 2529 // nothing is an instance of a primitive type | |
| 2530 prim_return_value = intcon(0); | |
| 2531 break; | |
| 2532 case vmIntrinsics::_getModifiers: | |
| 2533 prim_return_value = intcon(JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC); | |
| 2534 assert(is_power_of_2((int)JVM_ACC_WRITTEN_FLAGS+1), "change next line"); | |
| 2535 return_type = TypeInt::make(0, JVM_ACC_WRITTEN_FLAGS, Type::WidenMin); | |
| 2536 break; | |
| 2537 case vmIntrinsics::_isInterface: | |
| 2538 prim_return_value = intcon(0); | |
| 2539 break; | |
| 2540 case vmIntrinsics::_isArray: | |
| 2541 prim_return_value = intcon(0); | |
| 2542 expect_prim = true; // cf. ObjectStreamClass.getClassSignature | |
| 2543 break; | |
| 2544 case vmIntrinsics::_isPrimitive: | |
| 2545 prim_return_value = intcon(1); | |
| 2546 expect_prim = true; // obviously | |
| 2547 break; | |
| 2548 case vmIntrinsics::_getSuperclass: | |
| 2549 prim_return_value = null(); | |
| 2550 return_type = TypeInstPtr::MIRROR->cast_to_ptr_type(TypePtr::BotPTR); | |
| 2551 break; | |
| 2552 case vmIntrinsics::_getComponentType: | |
| 2553 prim_return_value = null(); | |
| 2554 return_type = TypeInstPtr::MIRROR->cast_to_ptr_type(TypePtr::BotPTR); | |
| 2555 break; | |
| 2556 case vmIntrinsics::_getClassAccessFlags: | |
| 2557 prim_return_value = intcon(JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC); | |
| 2558 return_type = TypeInt::INT; // not bool! 6297094 | |
| 2559 break; | |
| 2560 default: | |
| 2561 ShouldNotReachHere(); | |
| 2562 } | |
| 2563 | |
| 2564 Node* mirror = argument(0); | |
| 2565 Node* obj = (nargs <= 1)? top(): argument(1); | |
| 2566 | |
| 2567 const TypeInstPtr* mirror_con = _gvn.type(mirror)->isa_instptr(); | |
| 2568 if (mirror_con == NULL) return false; // cannot happen? | |
| 2569 | |
| 2570 #ifndef PRODUCT | |
| 2571 if (PrintIntrinsics || PrintInlining || PrintOptoInlining) { | |
| 2572 ciType* k = mirror_con->java_mirror_type(); | |
| 2573 if (k) { | |
| 2574 tty->print("Inlining %s on constant Class ", vmIntrinsics::name_at(intrinsic_id())); | |
| 2575 k->print_name(); | |
| 2576 tty->cr(); | |
| 2577 } | |
| 2578 } | |
| 2579 #endif | |
| 2580 | |
| 2581 // Null-check the mirror, and the mirror's klass ptr (in case it is a primitive). | |
| 2582 RegionNode* region = new (C, PATH_LIMIT) RegionNode(PATH_LIMIT); | |
| 2583 record_for_igvn(region); | |
| 2584 PhiNode* phi = new (C, PATH_LIMIT) PhiNode(region, return_type); | |
| 2585 | |
| 2586 // The mirror will never be null of Reflection.getClassAccessFlags, however | |
| 2587 // it may be null for Class.isInstance or Class.getModifiers. Throw a NPE | |
| 2588 // if it is. See bug 4774291. | |
| 2589 | |
| 2590 // For Reflection.getClassAccessFlags(), the null check occurs in | |
| 2591 // the wrong place; see inline_unsafe_access(), above, for a similar | |
| 2592 // situation. | |
| 2593 _sp += nargs; // set original stack for use by uncommon_trap | |
| 2594 mirror = do_null_check(mirror, T_OBJECT); | |
| 2595 _sp -= nargs; | |
| 2596 // If mirror or obj is dead, only null-path is taken. | |
| 2597 if (stopped()) return true; | |
| 2598 | |
| 2599 if (expect_prim) never_see_null = false; // expect nulls (meaning prims) | |
| 2600 | |
| 2601 // Now load the mirror's klass metaobject, and null-check it. | |
| 2602 // Side-effects region with the control path if the klass is null. | |
| 2603 Node* kls = load_klass_from_mirror(mirror, never_see_null, nargs, | |
| 2604 region, _prim_path); | |
| 2605 // If kls is null, we have a primitive mirror. | |
| 2606 phi->init_req(_prim_path, prim_return_value); | |
| 2607 if (stopped()) { push_result(region, phi); return true; } | |
| 2608 | |
| 2609 Node* p; // handy temp | |
| 2610 Node* null_ctl; | |
| 2611 | |
| 2612 // Now that we have the non-null klass, we can perform the real query. | |
| 2613 // For constant classes, the query will constant-fold in LoadNode::Value. | |
| 2614 Node* query_value = top(); | |
| 2615 switch (id) { | |
| 2616 case vmIntrinsics::_isInstance: | |
| 2617 // nothing is an instance of a primitive type | |
| 2618 query_value = gen_instanceof(obj, kls); | |
| 2619 break; | |
| 2620 | |
| 2621 case vmIntrinsics::_getModifiers: | |
| 2622 p = basic_plus_adr(kls, Klass::modifier_flags_offset_in_bytes() + sizeof(oopDesc)); | |
| 2623 query_value = make_load(NULL, p, TypeInt::INT, T_INT); | |
| 2624 break; | |
| 2625 | |
| 2626 case vmIntrinsics::_isInterface: | |
| 2627 // (To verify this code sequence, check the asserts in JVM_IsInterface.) | |
| 2628 if (generate_interface_guard(kls, region) != NULL) | |
| 2629 // A guard was added. If the guard is taken, it was an interface. | |
| 2630 phi->add_req(intcon(1)); | |
| 2631 // If we fall through, it's a plain class. | |
| 2632 query_value = intcon(0); | |
| 2633 break; | |
| 2634 | |
| 2635 case vmIntrinsics::_isArray: | |
| 2636 // (To verify this code sequence, check the asserts in JVM_IsArrayClass.) | |
| 2637 if (generate_array_guard(kls, region) != NULL) | |
| 2638 // A guard was added. If the guard is taken, it was an array. | |
| 2639 phi->add_req(intcon(1)); | |
| 2640 // If we fall through, it's a plain class. | |
| 2641 query_value = intcon(0); | |
| 2642 break; | |
| 2643 | |
| 2644 case vmIntrinsics::_isPrimitive: | |
| 2645 query_value = intcon(0); // "normal" path produces false | |
| 2646 break; | |
| 2647 | |
| 2648 case vmIntrinsics::_getSuperclass: | |
| 2649 // The rules here are somewhat unfortunate, but we can still do better | |
| 2650 // with random logic than with a JNI call. | |
| 2651 // Interfaces store null or Object as _super, but must report null. | |
| 2652 // Arrays store an intermediate super as _super, but must report Object. | |
| 2653 // Other types can report the actual _super. | |
| 2654 // (To verify this code sequence, check the asserts in JVM_IsInterface.) | |
| 2655 if (generate_interface_guard(kls, region) != NULL) | |
| 2656 // A guard was added. If the guard is taken, it was an interface. | |
| 2657 phi->add_req(null()); | |
| 2658 if (generate_array_guard(kls, region) != NULL) | |
| 2659 // A guard was added. If the guard is taken, it was an array. | |
| 2660 phi->add_req(makecon(TypeInstPtr::make(env()->Object_klass()->java_mirror()))); | |
| 2661 // If we fall through, it's a plain class. Get its _super. | |
| 2662 p = basic_plus_adr(kls, Klass::super_offset_in_bytes() + sizeof(oopDesc)); | |
|
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2663 kls = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeRawPtr::BOTTOM, TypeKlassPtr::OBJECT_OR_NULL) ); |
| 0 | 2664 null_ctl = top(); |
| 2665 kls = null_check_oop(kls, &null_ctl); | |
| 2666 if (null_ctl != top()) { | |
| 2667 // If the guard is taken, Object.superClass is null (both klass and mirror). | |
| 2668 region->add_req(null_ctl); | |
| 2669 phi ->add_req(null()); | |
| 2670 } | |
| 2671 if (!stopped()) { | |
| 2672 query_value = load_mirror_from_klass(kls); | |
| 2673 } | |
| 2674 break; | |
| 2675 | |
| 2676 case vmIntrinsics::_getComponentType: | |
| 2677 if (generate_array_guard(kls, region) != NULL) { | |
| 2678 // Be sure to pin the oop load to the guard edge just created: | |
| 2679 Node* is_array_ctrl = region->in(region->req()-1); | |
| 2680 Node* cma = basic_plus_adr(kls, in_bytes(arrayKlass::component_mirror_offset()) + sizeof(oopDesc)); | |
| 2681 Node* cmo = make_load(is_array_ctrl, cma, TypeInstPtr::MIRROR, T_OBJECT); | |
| 2682 phi->add_req(cmo); | |
| 2683 } | |
| 2684 query_value = null(); // non-array case is null | |
| 2685 break; | |
| 2686 | |
| 2687 case vmIntrinsics::_getClassAccessFlags: | |
| 2688 p = basic_plus_adr(kls, Klass::access_flags_offset_in_bytes() + sizeof(oopDesc)); | |
| 2689 query_value = make_load(NULL, p, TypeInt::INT, T_INT); | |
| 2690 break; | |
| 2691 | |
| 2692 default: | |
| 2693 ShouldNotReachHere(); | |
| 2694 } | |
| 2695 | |
| 2696 // Fall-through is the normal case of a query to a real class. | |
| 2697 phi->init_req(1, query_value); | |
| 2698 region->init_req(1, control()); | |
| 2699 | |
| 2700 push_result(region, phi); | |
| 2701 C->set_has_split_ifs(true); // Has chance for split-if optimization | |
| 2702 | |
| 2703 return true; | |
| 2704 } | |
| 2705 | |
| 2706 //--------------------------inline_native_subtype_check------------------------ | |
| 2707 // This intrinsic takes the JNI calls out of the heart of | |
| 2708 // UnsafeFieldAccessorImpl.set, which improves Field.set, readObject, etc. | |
| 2709 bool LibraryCallKit::inline_native_subtype_check() { | |
| 2710 int nargs = 1+1; // the Class mirror, plus the other class getting examined | |
| 2711 | |
| 2712 // Pull both arguments off the stack. | |
| 2713 Node* args[2]; // two java.lang.Class mirrors: superc, subc | |
| 2714 args[0] = argument(0); | |
| 2715 args[1] = argument(1); | |
| 2716 Node* klasses[2]; // corresponding Klasses: superk, subk | |
| 2717 klasses[0] = klasses[1] = top(); | |
| 2718 | |
| 2719 enum { | |
| 2720 // A full decision tree on {superc is prim, subc is prim}: | |
| 2721 _prim_0_path = 1, // {P,N} => false | |
| 2722 // {P,P} & superc!=subc => false | |
| 2723 _prim_same_path, // {P,P} & superc==subc => true | |
| 2724 _prim_1_path, // {N,P} => false | |
| 2725 _ref_subtype_path, // {N,N} & subtype check wins => true | |
| 2726 _both_ref_path, // {N,N} & subtype check loses => false | |
| 2727 PATH_LIMIT | |
| 2728 }; | |
| 2729 | |
| 2730 RegionNode* region = new (C, PATH_LIMIT) RegionNode(PATH_LIMIT); | |
| 2731 Node* phi = new (C, PATH_LIMIT) PhiNode(region, TypeInt::BOOL); | |
| 2732 record_for_igvn(region); | |
| 2733 | |
| 2734 const TypePtr* adr_type = TypeRawPtr::BOTTOM; // memory type of loads | |
| 2735 const TypeKlassPtr* kls_type = TypeKlassPtr::OBJECT_OR_NULL; | |
| 2736 int class_klass_offset = java_lang_Class::klass_offset_in_bytes(); | |
| 2737 | |
| 2738 // First null-check both mirrors and load each mirror's klass metaobject. | |
| 2739 int which_arg; | |
| 2740 for (which_arg = 0; which_arg <= 1; which_arg++) { | |
| 2741 Node* arg = args[which_arg]; | |
| 2742 _sp += nargs; // set original stack for use by uncommon_trap | |
| 2743 arg = do_null_check(arg, T_OBJECT); | |
| 2744 _sp -= nargs; | |
| 2745 if (stopped()) break; | |
| 2746 args[which_arg] = _gvn.transform(arg); | |
| 2747 | |
| 2748 Node* p = basic_plus_adr(arg, class_klass_offset); | |
|
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2749 Node* kls = LoadKlassNode::make(_gvn, immutable_memory(), p, adr_type, kls_type); |
| 0 | 2750 klasses[which_arg] = _gvn.transform(kls); |
| 2751 } | |
| 2752 | |
| 2753 // Having loaded both klasses, test each for null. | |
| 2754 bool never_see_null = !too_many_traps(Deoptimization::Reason_null_check); | |
| 2755 for (which_arg = 0; which_arg <= 1; which_arg++) { | |
| 2756 Node* kls = klasses[which_arg]; | |
| 2757 Node* null_ctl = top(); | |
| 2758 _sp += nargs; // set original stack for use by uncommon_trap | |
| 2759 kls = null_check_oop(kls, &null_ctl, never_see_null); | |
| 2760 _sp -= nargs; | |
| 2761 int prim_path = (which_arg == 0 ? _prim_0_path : _prim_1_path); | |
| 2762 region->init_req(prim_path, null_ctl); | |
| 2763 if (stopped()) break; | |
| 2764 klasses[which_arg] = kls; | |
| 2765 } | |
| 2766 | |
| 2767 if (!stopped()) { | |
| 2768 // now we have two reference types, in klasses[0..1] | |
| 2769 Node* subk = klasses[1]; // the argument to isAssignableFrom | |
| 2770 Node* superk = klasses[0]; // the receiver | |
| 2771 region->set_req(_both_ref_path, gen_subtype_check(subk, superk)); | |
| 2772 // now we have a successful reference subtype check | |
| 2773 region->set_req(_ref_subtype_path, control()); | |
| 2774 } | |
| 2775 | |
| 2776 // If both operands are primitive (both klasses null), then | |
| 2777 // we must return true when they are identical primitives. | |
| 2778 // It is convenient to test this after the first null klass check. | |
| 2779 set_control(region->in(_prim_0_path)); // go back to first null check | |
| 2780 if (!stopped()) { | |
| 2781 // Since superc is primitive, make a guard for the superc==subc case. | |
| 2782 Node* cmp_eq = _gvn.transform( new (C, 3) CmpPNode(args[0], args[1]) ); | |
| 2783 Node* bol_eq = _gvn.transform( new (C, 2) BoolNode(cmp_eq, BoolTest::eq) ); | |
| 2784 generate_guard(bol_eq, region, PROB_FAIR); | |
| 2785 if (region->req() == PATH_LIMIT+1) { | |
| 2786 // A guard was added. If the added guard is taken, superc==subc. | |
| 2787 region->swap_edges(PATH_LIMIT, _prim_same_path); | |
| 2788 region->del_req(PATH_LIMIT); | |
| 2789 } | |
| 2790 region->set_req(_prim_0_path, control()); // Not equal after all. | |
| 2791 } | |
| 2792 | |
| 2793 // these are the only paths that produce 'true': | |
| 2794 phi->set_req(_prim_same_path, intcon(1)); | |
| 2795 phi->set_req(_ref_subtype_path, intcon(1)); | |
| 2796 | |
| 2797 // pull together the cases: | |
| 2798 assert(region->req() == PATH_LIMIT, "sane region"); | |
| 2799 for (uint i = 1; i < region->req(); i++) { | |
| 2800 Node* ctl = region->in(i); | |
| 2801 if (ctl == NULL || ctl == top()) { | |
| 2802 region->set_req(i, top()); | |
| 2803 phi ->set_req(i, top()); | |
| 2804 } else if (phi->in(i) == NULL) { | |
| 2805 phi->set_req(i, intcon(0)); // all other paths produce 'false' | |
| 2806 } | |
| 2807 } | |
| 2808 | |
| 2809 set_control(_gvn.transform(region)); | |
| 2810 push(_gvn.transform(phi)); | |
| 2811 | |
| 2812 return true; | |
| 2813 } | |
| 2814 | |
| 2815 //---------------------generate_array_guard_common------------------------ | |
| 2816 Node* LibraryCallKit::generate_array_guard_common(Node* kls, RegionNode* region, | |
| 2817 bool obj_array, bool not_array) { | |
| 2818 // If obj_array/non_array==false/false: | |
| 2819 // Branch around if the given klass is in fact an array (either obj or prim). | |
| 2820 // If obj_array/non_array==false/true: | |
| 2821 // Branch around if the given klass is not an array klass of any kind. | |
| 2822 // If obj_array/non_array==true/true: | |
| 2823 // Branch around if the kls is not an oop array (kls is int[], String, etc.) | |
| 2824 // If obj_array/non_array==true/false: | |
| 2825 // Branch around if the kls is an oop array (Object[] or subtype) | |
| 2826 // | |
| 2827 // Like generate_guard, adds a new path onto the region. | |
| 2828 jint layout_con = 0; | |
| 2829 Node* layout_val = get_layout_helper(kls, layout_con); | |
| 2830 if (layout_val == NULL) { | |
| 2831 bool query = (obj_array | |
| 2832 ? Klass::layout_helper_is_objArray(layout_con) | |
| 2833 : Klass::layout_helper_is_javaArray(layout_con)); | |
| 2834 if (query == not_array) { | |
| 2835 return NULL; // never a branch | |
| 2836 } else { // always a branch | |
| 2837 Node* always_branch = control(); | |
| 2838 if (region != NULL) | |
| 2839 region->add_req(always_branch); | |
| 2840 set_control(top()); | |
| 2841 return always_branch; | |
| 2842 } | |
| 2843 } | |
| 2844 // Now test the correct condition. | |
| 2845 jint nval = (obj_array | |
| 2846 ? ((jint)Klass::_lh_array_tag_type_value | |
| 2847 << Klass::_lh_array_tag_shift) | |
| 2848 : Klass::_lh_neutral_value); | |
| 2849 Node* cmp = _gvn.transform( new(C, 3) CmpINode(layout_val, intcon(nval)) ); | |
| 2850 BoolTest::mask btest = BoolTest::lt; // correct for testing is_[obj]array | |
| 2851 // invert the test if we are looking for a non-array | |
| 2852 if (not_array) btest = BoolTest(btest).negate(); | |
| 2853 Node* bol = _gvn.transform( new(C, 2) BoolNode(cmp, btest) ); | |
| 2854 return generate_fair_guard(bol, region); | |
| 2855 } | |
| 2856 | |
| 2857 | |
| 2858 //-----------------------inline_native_newArray-------------------------- | |
| 2859 bool LibraryCallKit::inline_native_newArray() { | |
| 2860 int nargs = 2; | |
| 2861 Node* mirror = argument(0); | |
| 2862 Node* count_val = argument(1); | |
| 2863 | |
| 2864 _sp += nargs; // set original stack for use by uncommon_trap | |
| 2865 mirror = do_null_check(mirror, T_OBJECT); | |
| 2866 _sp -= nargs; | |
| 163 | 2867 // If mirror or obj is dead, only null-path is taken. |
| 2868 if (stopped()) return true; | |
| 0 | 2869 |
| 2870 enum { _normal_path = 1, _slow_path = 2, PATH_LIMIT }; | |
| 2871 RegionNode* result_reg = new(C, PATH_LIMIT) RegionNode(PATH_LIMIT); | |
| 2872 PhiNode* result_val = new(C, PATH_LIMIT) PhiNode(result_reg, | |
| 2873 TypeInstPtr::NOTNULL); | |
| 2874 PhiNode* result_io = new(C, PATH_LIMIT) PhiNode(result_reg, Type::ABIO); | |
| 2875 PhiNode* result_mem = new(C, PATH_LIMIT) PhiNode(result_reg, Type::MEMORY, | |
| 2876 TypePtr::BOTTOM); | |
| 2877 | |
| 2878 bool never_see_null = !too_many_traps(Deoptimization::Reason_null_check); | |
| 2879 Node* klass_node = load_array_klass_from_mirror(mirror, never_see_null, | |
| 2880 nargs, | |
| 2881 result_reg, _slow_path); | |
| 2882 Node* normal_ctl = control(); | |
| 2883 Node* no_array_ctl = result_reg->in(_slow_path); | |
| 2884 | |
| 2885 // Generate code for the slow case. We make a call to newArray(). | |
| 2886 set_control(no_array_ctl); | |
| 2887 if (!stopped()) { | |
| 2888 // Either the input type is void.class, or else the | |
| 2889 // array klass has not yet been cached. Either the | |
| 2890 // ensuing call will throw an exception, or else it | |
| 2891 // will cache the array klass for next time. | |
| 2892 PreserveJVMState pjvms(this); | |
| 2893 CallJavaNode* slow_call = generate_method_call_static(vmIntrinsics::_newArray); | |
| 2894 Node* slow_result = set_results_for_java_call(slow_call); | |
| 2895 // this->control() comes from set_results_for_java_call | |
| 2896 result_reg->set_req(_slow_path, control()); | |
| 2897 result_val->set_req(_slow_path, slow_result); | |
| 2898 result_io ->set_req(_slow_path, i_o()); | |
| 2899 result_mem->set_req(_slow_path, reset_memory()); | |
| 2900 } | |
| 2901 | |
| 2902 set_control(normal_ctl); | |
| 2903 if (!stopped()) { | |
| 2904 // Normal case: The array type has been cached in the java.lang.Class. | |
| 2905 // The following call works fine even if the array type is polymorphic. | |
| 2906 // It could be a dynamic mix of int[], boolean[], Object[], etc. | |
| 2907 _sp += nargs; // set original stack for use by uncommon_trap | |
| 2908 Node* obj = new_array(klass_node, count_val); | |
| 2909 _sp -= nargs; | |
| 2910 result_reg->init_req(_normal_path, control()); | |
| 2911 result_val->init_req(_normal_path, obj); | |
| 2912 result_io ->init_req(_normal_path, i_o()); | |
| 2913 result_mem->init_req(_normal_path, reset_memory()); | |
| 2914 } | |
| 2915 | |
| 2916 // Return the combined state. | |
| 2917 set_i_o( _gvn.transform(result_io) ); | |
| 2918 set_all_memory( _gvn.transform(result_mem) ); | |
| 2919 push_result(result_reg, result_val); | |
| 2920 C->set_has_split_ifs(true); // Has chance for split-if optimization | |
| 2921 | |
| 2922 return true; | |
| 2923 } | |
| 2924 | |
| 2925 //----------------------inline_native_getLength-------------------------- | |
| 2926 bool LibraryCallKit::inline_native_getLength() { | |
| 2927 if (too_many_traps(Deoptimization::Reason_intrinsic)) return false; | |
| 2928 | |
| 2929 int nargs = 1; | |
| 2930 Node* array = argument(0); | |
| 2931 | |
| 2932 _sp += nargs; // set original stack for use by uncommon_trap | |
| 2933 array = do_null_check(array, T_OBJECT); | |
| 2934 _sp -= nargs; | |
| 2935 | |
| 2936 // If array is dead, only null-path is taken. | |
| 2937 if (stopped()) return true; | |
| 2938 | |
| 2939 // Deoptimize if it is a non-array. | |
| 2940 Node* non_array = generate_non_array_guard(load_object_klass(array), NULL); | |
| 2941 | |
| 2942 if (non_array != NULL) { | |
| 2943 PreserveJVMState pjvms(this); | |
| 2944 set_control(non_array); | |
| 2945 _sp += nargs; // push the arguments back on the stack | |
| 2946 uncommon_trap(Deoptimization::Reason_intrinsic, | |
| 2947 Deoptimization::Action_maybe_recompile); | |
| 2948 } | |
| 2949 | |
| 2950 // If control is dead, only non-array-path is taken. | |
| 2951 if (stopped()) return true; | |
| 2952 | |
| 2953 // The works fine even if the array type is polymorphic. | |
| 2954 // It could be a dynamic mix of int[], boolean[], Object[], etc. | |
| 2955 push( load_array_length(array) ); | |
| 2956 | |
| 2957 C->set_has_split_ifs(true); // Has chance for split-if optimization | |
| 2958 | |
| 2959 return true; | |
| 2960 } | |
| 2961 | |
| 2962 //------------------------inline_array_copyOf---------------------------- | |
| 2963 bool LibraryCallKit::inline_array_copyOf(bool is_copyOfRange) { | |
| 2964 if (too_many_traps(Deoptimization::Reason_intrinsic)) return false; | |
| 2965 | |
| 2966 // Restore the stack and pop off the arguments. | |
| 2967 int nargs = 3 + (is_copyOfRange? 1: 0); | |
| 2968 Node* original = argument(0); | |
| 2969 Node* start = is_copyOfRange? argument(1): intcon(0); | |
| 2970 Node* end = is_copyOfRange? argument(2): argument(1); | |
| 2971 Node* array_type_mirror = is_copyOfRange? argument(3): argument(2); | |
| 2972 | |
| 2973 _sp += nargs; // set original stack for use by uncommon_trap | |
| 2974 array_type_mirror = do_null_check(array_type_mirror, T_OBJECT); | |
| 2975 original = do_null_check(original, T_OBJECT); | |
| 2976 _sp -= nargs; | |
| 2977 | |
| 2978 // Check if a null path was taken unconditionally. | |
| 2979 if (stopped()) return true; | |
| 2980 | |
| 2981 Node* orig_length = load_array_length(original); | |
| 2982 | |
| 2983 Node* klass_node = load_klass_from_mirror(array_type_mirror, false, nargs, | |
| 2984 NULL, 0); | |
| 2985 _sp += nargs; // set original stack for use by uncommon_trap | |
| 2986 klass_node = do_null_check(klass_node, T_OBJECT); | |
| 2987 _sp -= nargs; | |
| 2988 | |
| 2989 RegionNode* bailout = new (C, 1) RegionNode(1); | |
| 2990 record_for_igvn(bailout); | |
| 2991 | |
| 2992 // Despite the generic type of Arrays.copyOf, the mirror might be int, int[], etc. | |
| 2993 // Bail out if that is so. | |
| 2994 Node* not_objArray = generate_non_objArray_guard(klass_node, bailout); | |
| 2995 if (not_objArray != NULL) { | |
| 2996 // Improve the klass node's type from the new optimistic assumption: | |
| 2997 ciKlass* ak = ciArrayKlass::make(env()->Object_klass()); | |
| 2998 const Type* akls = TypeKlassPtr::make(TypePtr::NotNull, ak, 0/*offset*/); | |
| 2999 Node* cast = new (C, 2) CastPPNode(klass_node, akls); | |
| 3000 cast->init_req(0, control()); | |
| 3001 klass_node = _gvn.transform(cast); | |
| 3002 } | |
| 3003 | |
| 3004 // Bail out if either start or end is negative. | |
| 3005 generate_negative_guard(start, bailout, &start); | |
| 3006 generate_negative_guard(end, bailout, &end); | |
| 3007 | |
| 3008 Node* length = end; | |
| 3009 if (_gvn.type(start) != TypeInt::ZERO) { | |
| 3010 length = _gvn.transform( new (C, 3) SubINode(end, start) ); | |
| 3011 } | |
| 3012 | |
| 3013 // Bail out if length is negative. | |
| 3014 // ...Not needed, since the new_array will throw the right exception. | |
| 3015 //generate_negative_guard(length, bailout, &length); | |
| 3016 | |
| 3017 if (bailout->req() > 1) { | |
| 3018 PreserveJVMState pjvms(this); | |
| 3019 set_control( _gvn.transform(bailout) ); | |
| 3020 _sp += nargs; // push the arguments back on the stack | |
| 3021 uncommon_trap(Deoptimization::Reason_intrinsic, | |
| 3022 Deoptimization::Action_maybe_recompile); | |
| 3023 } | |
| 3024 | |
| 3025 if (!stopped()) { | |
| 3026 // How many elements will we copy from the original? | |
| 3027 // The answer is MinI(orig_length - start, length). | |
| 3028 Node* orig_tail = _gvn.transform( new(C, 3) SubINode(orig_length, start) ); | |
| 3029 Node* moved = generate_min_max(vmIntrinsics::_min, orig_tail, length); | |
| 3030 | |
| 3031 _sp += nargs; // set original stack for use by uncommon_trap | |
| 3032 Node* newcopy = new_array(klass_node, length); | |
| 3033 _sp -= nargs; | |
| 3034 | |
| 3035 // Generate a direct call to the right arraycopy function(s). | |
| 3036 // We know the copy is disjoint but we might not know if the | |
| 3037 // oop stores need checking. | |
| 3038 // Extreme case: Arrays.copyOf((Integer[])x, 10, String[].class). | |
| 3039 // This will fail a store-check if x contains any non-nulls. | |
| 3040 bool disjoint_bases = true; | |
| 3041 bool length_never_negative = true; | |
| 3042 generate_arraycopy(TypeAryPtr::OOPS, T_OBJECT, | |
| 3043 original, start, newcopy, intcon(0), moved, | |
| 3044 nargs, disjoint_bases, length_never_negative); | |
| 3045 | |
| 3046 push(newcopy); | |
| 3047 } | |
| 3048 | |
| 3049 C->set_has_split_ifs(true); // Has chance for split-if optimization | |
| 3050 | |
| 3051 return true; | |
| 3052 } | |
| 3053 | |
| 3054 | |
| 3055 //----------------------generate_virtual_guard--------------------------- | |
| 3056 // Helper for hashCode and clone. Peeks inside the vtable to avoid a call. | |
| 3057 Node* LibraryCallKit::generate_virtual_guard(Node* obj_klass, | |
| 3058 RegionNode* slow_region) { | |
| 3059 ciMethod* method = callee(); | |
| 3060 int vtable_index = method->vtable_index(); | |
| 3061 // Get the methodOop out of the appropriate vtable entry. | |
| 3062 int entry_offset = (instanceKlass::vtable_start_offset() + | |
| 3063 vtable_index*vtableEntry::size()) * wordSize + | |
| 3064 vtableEntry::method_offset_in_bytes(); | |
| 3065 Node* entry_addr = basic_plus_adr(obj_klass, entry_offset); | |
| 3066 Node* target_call = make_load(NULL, entry_addr, TypeInstPtr::NOTNULL, T_OBJECT); | |
| 3067 | |
| 3068 // Compare the target method with the expected method (e.g., Object.hashCode). | |
| 3069 const TypeInstPtr* native_call_addr = TypeInstPtr::make(method); | |
| 3070 | |
| 3071 Node* native_call = makecon(native_call_addr); | |
| 3072 Node* chk_native = _gvn.transform( new(C, 3) CmpPNode(target_call, native_call) ); | |
| 3073 Node* test_native = _gvn.transform( new(C, 2) BoolNode(chk_native, BoolTest::ne) ); | |
| 3074 | |
| 3075 return generate_slow_guard(test_native, slow_region); | |
| 3076 } | |
| 3077 | |
| 3078 //-----------------------generate_method_call---------------------------- | |
| 3079 // Use generate_method_call to make a slow-call to the real | |
| 3080 // method if the fast path fails. An alternative would be to | |
| 3081 // use a stub like OptoRuntime::slow_arraycopy_Java. | |
| 3082 // This only works for expanding the current library call, | |
| 3083 // not another intrinsic. (E.g., don't use this for making an | |
| 3084 // arraycopy call inside of the copyOf intrinsic.) | |
| 3085 CallJavaNode* | |
| 3086 LibraryCallKit::generate_method_call(vmIntrinsics::ID method_id, bool is_virtual, bool is_static) { | |
| 3087 // When compiling the intrinsic method itself, do not use this technique. | |
| 3088 guarantee(callee() != C->method(), "cannot make slow-call to self"); | |
| 3089 | |
| 3090 ciMethod* method = callee(); | |
| 3091 // ensure the JVMS we have will be correct for this call | |
| 3092 guarantee(method_id == method->intrinsic_id(), "must match"); | |
| 3093 | |
| 3094 const TypeFunc* tf = TypeFunc::make(method); | |
| 3095 int tfdc = tf->domain()->cnt(); | |
| 3096 CallJavaNode* slow_call; | |
| 3097 if (is_static) { | |
| 3098 assert(!is_virtual, ""); | |
| 3099 slow_call = new(C, tfdc) CallStaticJavaNode(tf, | |
| 3100 SharedRuntime::get_resolve_static_call_stub(), | |
| 3101 method, bci()); | |
| 3102 } else if (is_virtual) { | |
| 3103 null_check_receiver(method); | |
| 3104 int vtable_index = methodOopDesc::invalid_vtable_index; | |
| 3105 if (UseInlineCaches) { | |
| 3106 // Suppress the vtable call | |
| 3107 } else { | |
| 3108 // hashCode and clone are not a miranda methods, | |
| 3109 // so the vtable index is fixed. | |
| 3110 // No need to use the linkResolver to get it. | |
| 3111 vtable_index = method->vtable_index(); | |
| 3112 } | |
| 3113 slow_call = new(C, tfdc) CallDynamicJavaNode(tf, | |
| 3114 SharedRuntime::get_resolve_virtual_call_stub(), | |
| 3115 method, vtable_index, bci()); | |
| 3116 } else { // neither virtual nor static: opt_virtual | |
| 3117 null_check_receiver(method); | |
| 3118 slow_call = new(C, tfdc) CallStaticJavaNode(tf, | |
| 3119 SharedRuntime::get_resolve_opt_virtual_call_stub(), | |
| 3120 method, bci()); | |
| 3121 slow_call->set_optimized_virtual(true); | |
| 3122 } | |
| 3123 set_arguments_for_java_call(slow_call); | |
| 3124 set_edges_for_java_call(slow_call); | |
| 3125 return slow_call; | |
| 3126 } | |
| 3127 | |
| 3128 | |
| 3129 //------------------------------inline_native_hashcode-------------------- | |
| 3130 // Build special case code for calls to hashCode on an object. | |
| 3131 bool LibraryCallKit::inline_native_hashcode(bool is_virtual, bool is_static) { | |
| 3132 assert(is_static == callee()->is_static(), "correct intrinsic selection"); | |
| 3133 assert(!(is_virtual && is_static), "either virtual, special, or static"); | |
| 3134 | |
| 3135 enum { _slow_path = 1, _fast_path, _null_path, PATH_LIMIT }; | |
| 3136 | |
| 3137 RegionNode* result_reg = new(C, PATH_LIMIT) RegionNode(PATH_LIMIT); | |
| 3138 PhiNode* result_val = new(C, PATH_LIMIT) PhiNode(result_reg, | |
| 3139 TypeInt::INT); | |
| 3140 PhiNode* result_io = new(C, PATH_LIMIT) PhiNode(result_reg, Type::ABIO); | |
| 3141 PhiNode* result_mem = new(C, PATH_LIMIT) PhiNode(result_reg, Type::MEMORY, | |
| 3142 TypePtr::BOTTOM); | |
| 3143 Node* obj = NULL; | |
| 3144 if (!is_static) { | |
| 3145 // Check for hashing null object | |
| 3146 obj = null_check_receiver(callee()); | |
| 3147 if (stopped()) return true; // unconditionally null | |
| 3148 result_reg->init_req(_null_path, top()); | |
| 3149 result_val->init_req(_null_path, top()); | |
| 3150 } else { | |
| 3151 // Do a null check, and return zero if null. | |
| 3152 // System.identityHashCode(null) == 0 | |
| 3153 obj = argument(0); | |
| 3154 Node* null_ctl = top(); | |
| 3155 obj = null_check_oop(obj, &null_ctl); | |
| 3156 result_reg->init_req(_null_path, null_ctl); | |
| 3157 result_val->init_req(_null_path, _gvn.intcon(0)); | |
| 3158 } | |
| 3159 | |
| 3160 // Unconditionally null? Then return right away. | |
| 3161 if (stopped()) { | |
| 3162 set_control( result_reg->in(_null_path) ); | |
| 3163 if (!stopped()) | |
| 3164 push( result_val ->in(_null_path) ); | |
| 3165 return true; | |
| 3166 } | |
| 3167 | |
| 3168 // After null check, get the object's klass. | |
| 3169 Node* obj_klass = load_object_klass(obj); | |
| 3170 | |
| 3171 // This call may be virtual (invokevirtual) or bound (invokespecial). | |
| 3172 // For each case we generate slightly different code. | |
| 3173 | |
| 3174 // We only go to the fast case code if we pass a number of guards. The | |
| 3175 // paths which do not pass are accumulated in the slow_region. | |
| 3176 RegionNode* slow_region = new (C, 1) RegionNode(1); | |
| 3177 record_for_igvn(slow_region); | |
| 3178 | |
| 3179 // If this is a virtual call, we generate a funny guard. We pull out | |
| 3180 // the vtable entry corresponding to hashCode() from the target object. | |
| 3181 // If the target method which we are calling happens to be the native | |
| 3182 // Object hashCode() method, we pass the guard. We do not need this | |
| 3183 // guard for non-virtual calls -- the caller is known to be the native | |
| 3184 // Object hashCode(). | |
| 3185 if (is_virtual) { | |
| 3186 generate_virtual_guard(obj_klass, slow_region); | |
| 3187 } | |
| 3188 | |
| 3189 // Get the header out of the object, use LoadMarkNode when available | |
| 3190 Node* header_addr = basic_plus_adr(obj, oopDesc::mark_offset_in_bytes()); | |
| 3191 Node* header = make_load(NULL, header_addr, TypeRawPtr::BOTTOM, T_ADDRESS); | |
| 3192 header = _gvn.transform( new (C, 2) CastP2XNode(NULL, header) ); | |
| 3193 | |
| 3194 // Test the header to see if it is unlocked. | |
| 3195 Node *lock_mask = _gvn.MakeConX(markOopDesc::biased_lock_mask_in_place); | |
| 3196 Node *lmasked_header = _gvn.transform( new (C, 3) AndXNode(header, lock_mask) ); | |
| 3197 Node *unlocked_val = _gvn.MakeConX(markOopDesc::unlocked_value); | |
| 3198 Node *chk_unlocked = _gvn.transform( new (C, 3) CmpXNode( lmasked_header, unlocked_val)); | |
| 3199 Node *test_unlocked = _gvn.transform( new (C, 2) BoolNode( chk_unlocked, BoolTest::ne) ); | |
| 3200 | |
| 3201 generate_slow_guard(test_unlocked, slow_region); | |
| 3202 | |
| 3203 // Get the hash value and check to see that it has been properly assigned. | |
| 3204 // We depend on hash_mask being at most 32 bits and avoid the use of | |
| 3205 // hash_mask_in_place because it could be larger than 32 bits in a 64-bit | |
| 3206 // vm: see markOop.hpp. | |
| 3207 Node *hash_mask = _gvn.intcon(markOopDesc::hash_mask); | |
| 3208 Node *hash_shift = _gvn.intcon(markOopDesc::hash_shift); | |
| 3209 Node *hshifted_header= _gvn.transform( new (C, 3) URShiftXNode(header, hash_shift) ); | |
| 3210 // This hack lets the hash bits live anywhere in the mark object now, as long | |
| 3211 // as the shift drops the relevent bits into the low 32 bits. Note that | |
| 3212 // Java spec says that HashCode is an int so there's no point in capturing | |
| 3213 // an 'X'-sized hashcode (32 in 32-bit build or 64 in 64-bit build). | |
| 3214 hshifted_header = ConvX2I(hshifted_header); | |
| 3215 Node *hash_val = _gvn.transform( new (C, 3) AndINode(hshifted_header, hash_mask) ); | |
| 3216 | |
| 3217 Node *no_hash_val = _gvn.intcon(markOopDesc::no_hash); | |
| 3218 Node *chk_assigned = _gvn.transform( new (C, 3) CmpINode( hash_val, no_hash_val)); | |
| 3219 Node *test_assigned = _gvn.transform( new (C, 2) BoolNode( chk_assigned, BoolTest::eq) ); | |
| 3220 | |
| 3221 generate_slow_guard(test_assigned, slow_region); | |
| 3222 | |
| 3223 Node* init_mem = reset_memory(); | |
| 3224 // fill in the rest of the null path: | |
| 3225 result_io ->init_req(_null_path, i_o()); | |
| 3226 result_mem->init_req(_null_path, init_mem); | |
| 3227 | |
| 3228 result_val->init_req(_fast_path, hash_val); | |
| 3229 result_reg->init_req(_fast_path, control()); | |
| 3230 result_io ->init_req(_fast_path, i_o()); | |
| 3231 result_mem->init_req(_fast_path, init_mem); | |
| 3232 | |
| 3233 // Generate code for the slow case. We make a call to hashCode(). | |
| 3234 set_control(_gvn.transform(slow_region)); | |
| 3235 if (!stopped()) { | |
| 3236 // No need for PreserveJVMState, because we're using up the present state. | |
| 3237 set_all_memory(init_mem); | |
| 3238 vmIntrinsics::ID hashCode_id = vmIntrinsics::_hashCode; | |
| 3239 if (is_static) hashCode_id = vmIntrinsics::_identityHashCode; | |
| 3240 CallJavaNode* slow_call = generate_method_call(hashCode_id, is_virtual, is_static); | |
| 3241 Node* slow_result = set_results_for_java_call(slow_call); | |
| 3242 // this->control() comes from set_results_for_java_call | |
| 3243 result_reg->init_req(_slow_path, control()); | |
| 3244 result_val->init_req(_slow_path, slow_result); | |
| 3245 result_io ->set_req(_slow_path, i_o()); | |
| 3246 result_mem ->set_req(_slow_path, reset_memory()); | |
| 3247 } | |
| 3248 | |
| 3249 // Return the combined state. | |
| 3250 set_i_o( _gvn.transform(result_io) ); | |
| 3251 set_all_memory( _gvn.transform(result_mem) ); | |
| 3252 push_result(result_reg, result_val); | |
| 3253 | |
| 3254 return true; | |
| 3255 } | |
| 3256 | |
| 3257 //---------------------------inline_native_getClass---------------------------- | |
| 3258 // Build special case code for calls to hashCode on an object. | |
| 3259 bool LibraryCallKit::inline_native_getClass() { | |
| 3260 Node* obj = null_check_receiver(callee()); | |
| 3261 if (stopped()) return true; | |
| 3262 push( load_mirror_from_klass(load_object_klass(obj)) ); | |
| 3263 return true; | |
| 3264 } | |
| 3265 | |
| 3266 //-----------------inline_native_Reflection_getCallerClass--------------------- | |
| 3267 // In the presence of deep enough inlining, getCallerClass() becomes a no-op. | |
| 3268 // | |
| 3269 // NOTE that this code must perform the same logic as | |
| 3270 // vframeStream::security_get_caller_frame in that it must skip | |
| 3271 // Method.invoke() and auxiliary frames. | |
| 3272 | |
| 3273 | |
| 3274 | |
| 3275 | |
| 3276 bool LibraryCallKit::inline_native_Reflection_getCallerClass() { | |
| 3277 ciMethod* method = callee(); | |
| 3278 | |
| 3279 #ifndef PRODUCT | |
| 3280 if ((PrintIntrinsics || PrintInlining || PrintOptoInlining) && Verbose) { | |
| 3281 tty->print_cr("Attempting to inline sun.reflect.Reflection.getCallerClass"); | |
| 3282 } | |
| 3283 #endif | |
| 3284 | |
| 3285 debug_only(int saved_sp = _sp); | |
| 3286 | |
| 3287 // Argument words: (int depth) | |
| 3288 int nargs = 1; | |
| 3289 | |
| 3290 _sp += nargs; | |
| 3291 Node* caller_depth_node = pop(); | |
| 3292 | |
| 3293 assert(saved_sp == _sp, "must have correct argument count"); | |
| 3294 | |
| 3295 // The depth value must be a constant in order for the runtime call | |
| 3296 // to be eliminated. | |
| 3297 const TypeInt* caller_depth_type = _gvn.type(caller_depth_node)->isa_int(); | |
| 3298 if (caller_depth_type == NULL || !caller_depth_type->is_con()) { | |
| 3299 #ifndef PRODUCT | |
| 3300 if ((PrintIntrinsics || PrintInlining || PrintOptoInlining) && Verbose) { | |
| 3301 tty->print_cr(" Bailing out because caller depth was not a constant"); | |
| 3302 } | |
| 3303 #endif | |
| 3304 return false; | |
| 3305 } | |
| 3306 // Note that the JVM state at this point does not include the | |
| 3307 // getCallerClass() frame which we are trying to inline. The | |
| 3308 // semantics of getCallerClass(), however, are that the "first" | |
| 3309 // frame is the getCallerClass() frame, so we subtract one from the | |
| 3310 // requested depth before continuing. We don't inline requests of | |
| 3311 // getCallerClass(0). | |
| 3312 int caller_depth = caller_depth_type->get_con() - 1; | |
| 3313 if (caller_depth < 0) { | |
| 3314 #ifndef PRODUCT | |
| 3315 if ((PrintIntrinsics || PrintInlining || PrintOptoInlining) && Verbose) { | |
| 3316 tty->print_cr(" Bailing out because caller depth was %d", caller_depth); | |
| 3317 } | |
| 3318 #endif | |
| 3319 return false; | |
| 3320 } | |
| 3321 | |
| 3322 if (!jvms()->has_method()) { | |
| 3323 #ifndef PRODUCT | |
| 3324 if ((PrintIntrinsics || PrintInlining || PrintOptoInlining) && Verbose) { | |
| 3325 tty->print_cr(" Bailing out because intrinsic was inlined at top level"); | |
| 3326 } | |
| 3327 #endif | |
| 3328 return false; | |
| 3329 } | |
| 3330 int _depth = jvms()->depth(); // cache call chain depth | |
| 3331 | |
| 3332 // Walk back up the JVM state to find the caller at the required | |
| 3333 // depth. NOTE that this code must perform the same logic as | |
| 3334 // vframeStream::security_get_caller_frame in that it must skip | |
| 3335 // Method.invoke() and auxiliary frames. Note also that depth is | |
| 3336 // 1-based (1 is the bottom of the inlining). | |
| 3337 int inlining_depth = _depth; | |
| 3338 JVMState* caller_jvms = NULL; | |
| 3339 | |
| 3340 if (inlining_depth > 0) { | |
| 3341 caller_jvms = jvms(); | |
| 3342 assert(caller_jvms = jvms()->of_depth(inlining_depth), "inlining_depth == our depth"); | |
| 3343 do { | |
| 3344 // The following if-tests should be performed in this order | |
| 3345 if (is_method_invoke_or_aux_frame(caller_jvms)) { | |
| 3346 // Skip a Method.invoke() or auxiliary frame | |
| 3347 } else if (caller_depth > 0) { | |
| 3348 // Skip real frame | |
| 3349 --caller_depth; | |
| 3350 } else { | |
| 3351 // We're done: reached desired caller after skipping. | |
| 3352 break; | |
| 3353 } | |
| 3354 caller_jvms = caller_jvms->caller(); | |
| 3355 --inlining_depth; | |
| 3356 } while (inlining_depth > 0); | |
| 3357 } | |
| 3358 | |
| 3359 if (inlining_depth == 0) { | |
| 3360 #ifndef PRODUCT | |
| 3361 if ((PrintIntrinsics || PrintInlining || PrintOptoInlining) && Verbose) { | |
| 3362 tty->print_cr(" Bailing out because caller depth (%d) exceeded inlining depth (%d)", caller_depth_type->get_con(), _depth); | |
| 3363 tty->print_cr(" JVM state at this point:"); | |
| 3364 for (int i = _depth; i >= 1; i--) { | |
| 3365 tty->print_cr(" %d) %s", i, jvms()->of_depth(i)->method()->name()->as_utf8()); | |
| 3366 } | |
| 3367 } | |
| 3368 #endif | |
| 3369 return false; // Reached end of inlining | |
| 3370 } | |
| 3371 | |
| 3372 // Acquire method holder as java.lang.Class | |
| 3373 ciInstanceKlass* caller_klass = caller_jvms->method()->holder(); | |
| 3374 ciInstance* caller_mirror = caller_klass->java_mirror(); | |
| 3375 // Push this as a constant | |
| 3376 push(makecon(TypeInstPtr::make(caller_mirror))); | |
| 3377 #ifndef PRODUCT | |
| 3378 if ((PrintIntrinsics || PrintInlining || PrintOptoInlining) && Verbose) { | |
| 3379 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); | |
| 3380 tty->print_cr(" JVM state at this point:"); | |
| 3381 for (int i = _depth; i >= 1; i--) { | |
| 3382 tty->print_cr(" %d) %s", i, jvms()->of_depth(i)->method()->name()->as_utf8()); | |
| 3383 } | |
| 3384 } | |
| 3385 #endif | |
| 3386 return true; | |
| 3387 } | |
| 3388 | |
| 3389 // Helper routine for above | |
| 3390 bool LibraryCallKit::is_method_invoke_or_aux_frame(JVMState* jvms) { | |
| 3391 // Is this the Method.invoke method itself? | |
| 3392 if (jvms->method()->intrinsic_id() == vmIntrinsics::_invoke) | |
| 3393 return true; | |
| 3394 | |
| 3395 // Is this a helper, defined somewhere underneath MethodAccessorImpl. | |
| 3396 ciKlass* k = jvms->method()->holder(); | |
| 3397 if (k->is_instance_klass()) { | |
| 3398 ciInstanceKlass* ik = k->as_instance_klass(); | |
| 3399 for (; ik != NULL; ik = ik->super()) { | |
| 3400 if (ik->name() == ciSymbol::sun_reflect_MethodAccessorImpl() && | |
| 3401 ik == env()->find_system_klass(ik->name())) { | |
| 3402 return true; | |
| 3403 } | |
| 3404 } | |
| 3405 } | |
| 3406 | |
| 3407 return false; | |
| 3408 } | |
| 3409 | |
| 3410 static int value_field_offset = -1; // offset of the "value" field of AtomicLongCSImpl. This is needed by | |
| 3411 // inline_native_AtomicLong_attemptUpdate() but it has no way of | |
| 3412 // computing it since there is no lookup field by name function in the | |
| 3413 // CI interface. This is computed and set by inline_native_AtomicLong_get(). | |
| 3414 // Using a static variable here is safe even if we have multiple compilation | |
| 3415 // threads because the offset is constant. At worst the same offset will be | |
| 3416 // computed and stored multiple | |
| 3417 | |
| 3418 bool LibraryCallKit::inline_native_AtomicLong_get() { | |
| 3419 // Restore the stack and pop off the argument | |
| 3420 _sp+=1; | |
| 3421 Node *obj = pop(); | |
| 3422 | |
| 3423 // get the offset of the "value" field. Since the CI interfaces | |
| 3424 // does not provide a way to look up a field by name, we scan the bytecodes | |
| 3425 // to get the field index. We expect the first 2 instructions of the method | |
| 3426 // to be: | |
| 3427 // 0 aload_0 | |
| 3428 // 1 getfield "value" | |
| 3429 ciMethod* method = callee(); | |
| 3430 if (value_field_offset == -1) | |
| 3431 { | |
| 3432 ciField* value_field; | |
| 3433 ciBytecodeStream iter(method); | |
| 3434 Bytecodes::Code bc = iter.next(); | |
| 3435 | |
| 3436 if ((bc != Bytecodes::_aload_0) && | |
| 3437 ((bc != Bytecodes::_aload) || (iter.get_index() != 0))) | |
| 3438 return false; | |
| 3439 bc = iter.next(); | |
| 3440 if (bc != Bytecodes::_getfield) | |
| 3441 return false; | |
| 3442 bool ignore; | |
| 3443 value_field = iter.get_field(ignore); | |
| 3444 value_field_offset = value_field->offset_in_bytes(); | |
| 3445 } | |
| 3446 | |
| 3447 // Null check without removing any arguments. | |
| 3448 _sp++; | |
| 3449 obj = do_null_check(obj, T_OBJECT); | |
| 3450 _sp--; | |
| 3451 // Check for locking null object | |
| 3452 if (stopped()) return true; | |
| 3453 | |
| 3454 Node *adr = basic_plus_adr(obj, obj, value_field_offset); | |
| 3455 const TypePtr *adr_type = _gvn.type(adr)->is_ptr(); | |
| 3456 int alias_idx = C->get_alias_index(adr_type); | |
| 3457 | |
| 3458 Node *result = _gvn.transform(new (C, 3) LoadLLockedNode(control(), memory(alias_idx), adr)); | |
| 3459 | |
| 3460 push_pair(result); | |
| 3461 | |
| 3462 return true; | |
| 3463 } | |
| 3464 | |
| 3465 bool LibraryCallKit::inline_native_AtomicLong_attemptUpdate() { | |
| 3466 // Restore the stack and pop off the arguments | |
| 3467 _sp+=5; | |
| 3468 Node *newVal = pop_pair(); | |
| 3469 Node *oldVal = pop_pair(); | |
| 3470 Node *obj = pop(); | |
| 3471 | |
| 3472 // we need the offset of the "value" field which was computed when | |
| 3473 // inlining the get() method. Give up if we don't have it. | |
| 3474 if (value_field_offset == -1) | |
| 3475 return false; | |
| 3476 | |
| 3477 // Null check without removing any arguments. | |
| 3478 _sp+=5; | |
| 3479 obj = do_null_check(obj, T_OBJECT); | |
| 3480 _sp-=5; | |
| 3481 // Check for locking null object | |
| 3482 if (stopped()) return true; | |
| 3483 | |
| 3484 Node *adr = basic_plus_adr(obj, obj, value_field_offset); | |
| 3485 const TypePtr *adr_type = _gvn.type(adr)->is_ptr(); | |
| 3486 int alias_idx = C->get_alias_index(adr_type); | |
| 3487 | |
| 3488 Node *result = _gvn.transform(new (C, 5) StoreLConditionalNode(control(), memory(alias_idx), adr, newVal, oldVal)); | |
| 3489 Node *store_proj = _gvn.transform( new (C, 1) SCMemProjNode(result)); | |
| 3490 set_memory(store_proj, alias_idx); | |
| 3491 | |
| 3492 push(result); | |
| 3493 return true; | |
| 3494 } | |
| 3495 | |
| 3496 bool LibraryCallKit::inline_fp_conversions(vmIntrinsics::ID id) { | |
| 3497 // restore the arguments | |
| 3498 _sp += arg_size(); | |
| 3499 | |
| 3500 switch (id) { | |
| 3501 case vmIntrinsics::_floatToRawIntBits: | |
| 3502 push(_gvn.transform( new (C, 2) MoveF2INode(pop()))); | |
| 3503 break; | |
| 3504 | |
| 3505 case vmIntrinsics::_intBitsToFloat: | |
| 3506 push(_gvn.transform( new (C, 2) MoveI2FNode(pop()))); | |
| 3507 break; | |
| 3508 | |
| 3509 case vmIntrinsics::_doubleToRawLongBits: | |
| 3510 push_pair(_gvn.transform( new (C, 2) MoveD2LNode(pop_pair()))); | |
| 3511 break; | |
| 3512 | |
| 3513 case vmIntrinsics::_longBitsToDouble: | |
| 3514 push_pair(_gvn.transform( new (C, 2) MoveL2DNode(pop_pair()))); | |
| 3515 break; | |
| 3516 | |
| 3517 case vmIntrinsics::_doubleToLongBits: { | |
| 3518 Node* value = pop_pair(); | |
| 3519 | |
| 3520 // two paths (plus control) merge in a wood | |
| 3521 RegionNode *r = new (C, 3) RegionNode(3); | |
| 3522 Node *phi = new (C, 3) PhiNode(r, TypeLong::LONG); | |
| 3523 | |
| 3524 Node *cmpisnan = _gvn.transform( new (C, 3) CmpDNode(value, value)); | |
| 3525 // Build the boolean node | |
| 3526 Node *bolisnan = _gvn.transform( new (C, 2) BoolNode( cmpisnan, BoolTest::ne ) ); | |
| 3527 | |
| 3528 // Branch either way. | |
| 3529 // NaN case is less traveled, which makes all the difference. | |
| 3530 IfNode *ifisnan = create_and_xform_if(control(), bolisnan, PROB_STATIC_FREQUENT, COUNT_UNKNOWN); | |
| 3531 Node *opt_isnan = _gvn.transform(ifisnan); | |
| 3532 assert( opt_isnan->is_If(), "Expect an IfNode"); | |
| 3533 IfNode *opt_ifisnan = (IfNode*)opt_isnan; | |
| 3534 Node *iftrue = _gvn.transform( new (C, 1) IfTrueNode(opt_ifisnan) ); | |
| 3535 | |
| 3536 set_control(iftrue); | |
| 3537 | |
| 3538 static const jlong nan_bits = CONST64(0x7ff8000000000000); | |
| 3539 Node *slow_result = longcon(nan_bits); // return NaN | |
| 3540 phi->init_req(1, _gvn.transform( slow_result )); | |
| 3541 r->init_req(1, iftrue); | |
| 3542 | |
| 3543 // Else fall through | |
| 3544 Node *iffalse = _gvn.transform( new (C, 1) IfFalseNode(opt_ifisnan) ); | |
| 3545 set_control(iffalse); | |
| 3546 | |
| 3547 phi->init_req(2, _gvn.transform( new (C, 2) MoveD2LNode(value))); | |
| 3548 r->init_req(2, iffalse); | |
| 3549 | |
| 3550 // Post merge | |
| 3551 set_control(_gvn.transform(r)); | |
| 3552 record_for_igvn(r); | |
| 3553 | |
| 3554 Node* result = _gvn.transform(phi); | |
| 3555 assert(result->bottom_type()->isa_long(), "must be"); | |
| 3556 push_pair(result); | |
| 3557 | |
| 3558 C->set_has_split_ifs(true); // Has chance for split-if optimization | |
| 3559 | |
| 3560 break; | |
| 3561 } | |
| 3562 | |
| 3563 case vmIntrinsics::_floatToIntBits: { | |
| 3564 Node* value = pop(); | |
| 3565 | |
| 3566 // two paths (plus control) merge in a wood | |
| 3567 RegionNode *r = new (C, 3) RegionNode(3); | |
| 3568 Node *phi = new (C, 3) PhiNode(r, TypeInt::INT); | |
| 3569 | |
| 3570 Node *cmpisnan = _gvn.transform( new (C, 3) CmpFNode(value, value)); | |
| 3571 // Build the boolean node | |
| 3572 Node *bolisnan = _gvn.transform( new (C, 2) BoolNode( cmpisnan, BoolTest::ne ) ); | |
| 3573 | |
| 3574 // Branch either way. | |
| 3575 // NaN case is less traveled, which makes all the difference. | |
| 3576 IfNode *ifisnan = create_and_xform_if(control(), bolisnan, PROB_STATIC_FREQUENT, COUNT_UNKNOWN); | |
| 3577 Node *opt_isnan = _gvn.transform(ifisnan); | |
| 3578 assert( opt_isnan->is_If(), "Expect an IfNode"); | |
| 3579 IfNode *opt_ifisnan = (IfNode*)opt_isnan; | |
| 3580 Node *iftrue = _gvn.transform( new (C, 1) IfTrueNode(opt_ifisnan) ); | |
| 3581 | |
| 3582 set_control(iftrue); | |
| 3583 | |
| 3584 static const jint nan_bits = 0x7fc00000; | |
| 3585 Node *slow_result = makecon(TypeInt::make(nan_bits)); // return NaN | |
| 3586 phi->init_req(1, _gvn.transform( slow_result )); | |
| 3587 r->init_req(1, iftrue); | |
| 3588 | |
| 3589 // Else fall through | |
| 3590 Node *iffalse = _gvn.transform( new (C, 1) IfFalseNode(opt_ifisnan) ); | |
| 3591 set_control(iffalse); | |
| 3592 | |
| 3593 phi->init_req(2, _gvn.transform( new (C, 2) MoveF2INode(value))); | |
| 3594 r->init_req(2, iffalse); | |
| 3595 | |
| 3596 // Post merge | |
| 3597 set_control(_gvn.transform(r)); | |
| 3598 record_for_igvn(r); | |
| 3599 | |
| 3600 Node* result = _gvn.transform(phi); | |
| 3601 assert(result->bottom_type()->isa_int(), "must be"); | |
| 3602 push(result); | |
| 3603 | |
| 3604 C->set_has_split_ifs(true); // Has chance for split-if optimization | |
| 3605 | |
| 3606 break; | |
| 3607 } | |
| 3608 | |
| 3609 default: | |
| 3610 ShouldNotReachHere(); | |
| 3611 } | |
| 3612 | |
| 3613 return true; | |
| 3614 } | |
| 3615 | |
| 3616 #ifdef _LP64 | |
| 3617 #define XTOP ,top() /*additional argument*/ | |
| 3618 #else //_LP64 | |
| 3619 #define XTOP /*no additional argument*/ | |
| 3620 #endif //_LP64 | |
| 3621 | |
| 3622 //----------------------inline_unsafe_copyMemory------------------------- | |
| 3623 bool LibraryCallKit::inline_unsafe_copyMemory() { | |
| 3624 if (callee()->is_static()) return false; // caller must have the capability! | |
| 3625 int nargs = 1 + 5 + 3; // 5 args: (src: ptr,off, dst: ptr,off, size) | |
| 3626 assert(signature()->size() == nargs-1, "copy has 5 arguments"); | |
| 3627 null_check_receiver(callee()); // check then ignore argument(0) | |
| 3628 if (stopped()) return true; | |
| 3629 | |
| 3630 C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe". | |
| 3631 | |
| 3632 Node* src_ptr = argument(1); | |
| 3633 Node* src_off = ConvL2X(argument(2)); | |
| 3634 assert(argument(3)->is_top(), "2nd half of long"); | |
| 3635 Node* dst_ptr = argument(4); | |
| 3636 Node* dst_off = ConvL2X(argument(5)); | |
| 3637 assert(argument(6)->is_top(), "2nd half of long"); | |
| 3638 Node* size = ConvL2X(argument(7)); | |
| 3639 assert(argument(8)->is_top(), "2nd half of long"); | |
| 3640 | |
| 3641 assert(Unsafe_field_offset_to_byte_offset(11) == 11, | |
| 3642 "fieldOffset must be byte-scaled"); | |
| 3643 | |
| 3644 Node* src = make_unsafe_address(src_ptr, src_off); | |
| 3645 Node* dst = make_unsafe_address(dst_ptr, dst_off); | |
| 3646 | |
| 3647 // Conservatively insert a memory barrier on all memory slices. | |
| 3648 // Do not let writes of the copy source or destination float below the copy. | |
| 3649 insert_mem_bar(Op_MemBarCPUOrder); | |
| 3650 | |
| 3651 // Call it. Note that the length argument is not scaled. | |
| 3652 make_runtime_call(RC_LEAF|RC_NO_FP, | |
| 3653 OptoRuntime::fast_arraycopy_Type(), | |
| 3654 StubRoutines::unsafe_arraycopy(), | |
| 3655 "unsafe_arraycopy", | |
| 3656 TypeRawPtr::BOTTOM, | |
| 3657 src, dst, size XTOP); | |
| 3658 | |
| 3659 // Do not let reads of the copy destination float above the copy. | |
| 3660 insert_mem_bar(Op_MemBarCPUOrder); | |
| 3661 | |
| 3662 return true; | |
| 3663 } | |
| 3664 | |
| 3665 | |
| 3666 //------------------------inline_native_clone---------------------------- | |
| 3667 // Here are the simple edge cases: | |
| 3668 // null receiver => normal trap | |
| 3669 // virtual and clone was overridden => slow path to out-of-line clone | |
| 3670 // not cloneable or finalizer => slow path to out-of-line Object.clone | |
| 3671 // | |
| 3672 // The general case has two steps, allocation and copying. | |
| 3673 // Allocation has two cases, and uses GraphKit::new_instance or new_array. | |
| 3674 // | |
| 3675 // Copying also has two cases, oop arrays and everything else. | |
| 3676 // Oop arrays use arrayof_oop_arraycopy (same as System.arraycopy). | |
| 3677 // Everything else uses the tight inline loop supplied by CopyArrayNode. | |
| 3678 // | |
| 3679 // These steps fold up nicely if and when the cloned object's klass | |
| 3680 // can be sharply typed as an object array, a type array, or an instance. | |
| 3681 // | |
| 3682 bool LibraryCallKit::inline_native_clone(bool is_virtual) { | |
| 3683 int nargs = 1; | |
| 3684 Node* obj = null_check_receiver(callee()); | |
| 3685 if (stopped()) return true; | |
| 3686 Node* obj_klass = load_object_klass(obj); | |
| 3687 const TypeKlassPtr* tklass = _gvn.type(obj_klass)->isa_klassptr(); | |
| 3688 const TypeOopPtr* toop = ((tklass != NULL) | |
| 3689 ? tklass->as_instance_type() | |
| 3690 : TypeInstPtr::NOTNULL); | |
| 3691 | |
| 3692 // Conservatively insert a memory barrier on all memory slices. | |
| 3693 // Do not let writes into the original float below the clone. | |
| 3694 insert_mem_bar(Op_MemBarCPUOrder); | |
| 3695 | |
| 3696 // paths into result_reg: | |
| 3697 enum { | |
| 3698 _slow_path = 1, // out-of-line call to clone method (virtual or not) | |
| 3699 _objArray_path, // plain allocation, plus arrayof_oop_arraycopy | |
| 3700 _fast_path, // plain allocation, plus a CopyArray operation | |
| 3701 PATH_LIMIT | |
| 3702 }; | |
| 3703 RegionNode* result_reg = new(C, PATH_LIMIT) RegionNode(PATH_LIMIT); | |
| 3704 PhiNode* result_val = new(C, PATH_LIMIT) PhiNode(result_reg, | |
| 3705 TypeInstPtr::NOTNULL); | |
| 3706 PhiNode* result_i_o = new(C, PATH_LIMIT) PhiNode(result_reg, Type::ABIO); | |
| 3707 PhiNode* result_mem = new(C, PATH_LIMIT) PhiNode(result_reg, Type::MEMORY, | |
| 3708 TypePtr::BOTTOM); | |
| 3709 record_for_igvn(result_reg); | |
| 3710 | |
| 3711 const TypePtr* raw_adr_type = TypeRawPtr::BOTTOM; | |
| 3712 int raw_adr_idx = Compile::AliasIdxRaw; | |
| 3713 const bool raw_mem_only = true; | |
| 3714 | |
| 3715 // paths into alloc_reg (on the fast path, just before the CopyArray): | |
| 3716 enum { _typeArray_alloc = 1, _instance_alloc, ALLOC_LIMIT }; | |
| 3717 RegionNode* alloc_reg = new(C, ALLOC_LIMIT) RegionNode(ALLOC_LIMIT); | |
| 3718 PhiNode* alloc_val = new(C, ALLOC_LIMIT) PhiNode(alloc_reg, raw_adr_type); | |
| 3719 PhiNode* alloc_siz = new(C, ALLOC_LIMIT) PhiNode(alloc_reg, TypeX_X); | |
| 3720 PhiNode* alloc_i_o = new(C, ALLOC_LIMIT) PhiNode(alloc_reg, Type::ABIO); | |
| 3721 PhiNode* alloc_mem = new(C, ALLOC_LIMIT) PhiNode(alloc_reg, Type::MEMORY, | |
| 3722 raw_adr_type); | |
| 3723 record_for_igvn(alloc_reg); | |
| 3724 | |
| 3725 bool card_mark = false; // (see below) | |
| 3726 | |
| 3727 Node* array_ctl = generate_array_guard(obj_klass, (RegionNode*)NULL); | |
| 3728 if (array_ctl != NULL) { | |
| 3729 // It's an array. | |
| 3730 PreserveJVMState pjvms(this); | |
| 3731 set_control(array_ctl); | |
| 3732 Node* obj_length = load_array_length(obj); | |
| 3733 Node* obj_size = NULL; | |
| 3734 _sp += nargs; // set original stack for use by uncommon_trap | |
| 3735 Node* alloc_obj = new_array(obj_klass, obj_length, | |
| 3736 raw_mem_only, &obj_size); | |
| 3737 _sp -= nargs; | |
| 3738 assert(obj_size != NULL, ""); | |
| 3739 Node* raw_obj = alloc_obj->in(1); | |
| 3740 assert(raw_obj->is_Proj() && raw_obj->in(0)->is_Allocate(), ""); | |
| 3741 if (ReduceBulkZeroing) { | |
| 3742 AllocateNode* alloc = AllocateNode::Ideal_allocation(alloc_obj, &_gvn); | |
| 3743 if (alloc != NULL) { | |
| 3744 // We will be completely responsible for initializing this object. | |
| 3745 alloc->maybe_set_complete(&_gvn); | |
| 3746 } | |
| 3747 } | |
| 3748 | |
| 3749 if (!use_ReduceInitialCardMarks()) { | |
| 3750 // If it is an oop array, it requires very special treatment, | |
| 3751 // because card marking is required on each card of the array. | |
| 3752 Node* is_obja = generate_objArray_guard(obj_klass, (RegionNode*)NULL); | |
| 3753 if (is_obja != NULL) { | |
| 3754 PreserveJVMState pjvms2(this); | |
| 3755 set_control(is_obja); | |
| 3756 // Generate a direct call to the right arraycopy function(s). | |
| 3757 bool disjoint_bases = true; | |
| 3758 bool length_never_negative = true; | |
| 3759 generate_arraycopy(TypeAryPtr::OOPS, T_OBJECT, | |
| 3760 obj, intcon(0), alloc_obj, intcon(0), | |
| 3761 obj_length, nargs, | |
| 3762 disjoint_bases, length_never_negative); | |
| 3763 result_reg->init_req(_objArray_path, control()); | |
| 3764 result_val->init_req(_objArray_path, alloc_obj); | |
| 3765 result_i_o ->set_req(_objArray_path, i_o()); | |
| 3766 result_mem ->set_req(_objArray_path, reset_memory()); | |
| 3767 } | |
| 3768 } | |
| 3769 // We can dispense with card marks if we know the allocation | |
| 3770 // comes out of eden (TLAB)... In fact, ReduceInitialCardMarks | |
| 3771 // causes the non-eden paths to simulate a fresh allocation, | |
| 3772 // insofar that no further card marks are required to initialize | |
| 3773 // the object. | |
| 3774 | |
| 3775 // Otherwise, there are no card marks to worry about. | |
| 3776 alloc_val->init_req(_typeArray_alloc, raw_obj); | |
| 3777 alloc_siz->init_req(_typeArray_alloc, obj_size); | |
| 3778 alloc_reg->init_req(_typeArray_alloc, control()); | |
| 3779 alloc_i_o->init_req(_typeArray_alloc, i_o()); | |
| 3780 alloc_mem->init_req(_typeArray_alloc, memory(raw_adr_type)); | |
| 3781 } | |
| 3782 | |
| 3783 // We only go to the fast case code if we pass a number of guards. | |
| 3784 // The paths which do not pass are accumulated in the slow_region. | |
| 3785 RegionNode* slow_region = new (C, 1) RegionNode(1); | |
| 3786 record_for_igvn(slow_region); | |
| 3787 if (!stopped()) { | |
| 3788 // It's an instance. Make the slow-path tests. | |
| 3789 // If this is a virtual call, we generate a funny guard. We grab | |
| 3790 // the vtable entry corresponding to clone() from the target object. | |
| 3791 // If the target method which we are calling happens to be the | |
| 3792 // Object clone() method, we pass the guard. We do not need this | |
| 3793 // guard for non-virtual calls; the caller is known to be the native | |
| 3794 // Object clone(). | |
| 3795 if (is_virtual) { | |
| 3796 generate_virtual_guard(obj_klass, slow_region); | |
| 3797 } | |
| 3798 | |
| 3799 // The object must be cloneable and must not have a finalizer. | |
| 3800 // Both of these conditions may be checked in a single test. | |
| 3801 // We could optimize the cloneable test further, but we don't care. | |
| 3802 generate_access_flags_guard(obj_klass, | |
| 3803 // Test both conditions: | |
| 3804 JVM_ACC_IS_CLONEABLE | JVM_ACC_HAS_FINALIZER, | |
| 3805 // Must be cloneable but not finalizer: | |
| 3806 JVM_ACC_IS_CLONEABLE, | |
| 3807 slow_region); | |
| 3808 } | |
| 3809 | |
| 3810 if (!stopped()) { | |
| 3811 // It's an instance, and it passed the slow-path tests. | |
| 3812 PreserveJVMState pjvms(this); | |
| 3813 Node* obj_size = NULL; | |
| 3814 Node* alloc_obj = new_instance(obj_klass, NULL, raw_mem_only, &obj_size); | |
| 3815 assert(obj_size != NULL, ""); | |
| 3816 Node* raw_obj = alloc_obj->in(1); | |
| 3817 assert(raw_obj->is_Proj() && raw_obj->in(0)->is_Allocate(), ""); | |
| 3818 if (ReduceBulkZeroing) { | |
| 3819 AllocateNode* alloc = AllocateNode::Ideal_allocation(alloc_obj, &_gvn); | |
| 3820 if (alloc != NULL && !alloc->maybe_set_complete(&_gvn)) | |
| 3821 alloc = NULL; | |
| 3822 } | |
| 3823 if (!use_ReduceInitialCardMarks()) { | |
| 3824 // Put in store barrier for any and all oops we are sticking | |
| 3825 // into this object. (We could avoid this if we could prove | |
| 3826 // that the object type contains no oop fields at all.) | |
| 3827 card_mark = true; | |
| 3828 } | |
| 3829 alloc_val->init_req(_instance_alloc, raw_obj); | |
| 3830 alloc_siz->init_req(_instance_alloc, obj_size); | |
| 3831 alloc_reg->init_req(_instance_alloc, control()); | |
| 3832 alloc_i_o->init_req(_instance_alloc, i_o()); | |
| 3833 alloc_mem->init_req(_instance_alloc, memory(raw_adr_type)); | |
| 3834 } | |
| 3835 | |
| 3836 // Generate code for the slow case. We make a call to clone(). | |
| 3837 set_control(_gvn.transform(slow_region)); | |
| 3838 if (!stopped()) { | |
| 3839 PreserveJVMState pjvms(this); | |
| 3840 CallJavaNode* slow_call = generate_method_call(vmIntrinsics::_clone, is_virtual); | |
| 3841 Node* slow_result = set_results_for_java_call(slow_call); | |
| 3842 // this->control() comes from set_results_for_java_call | |
| 3843 result_reg->init_req(_slow_path, control()); | |
| 3844 result_val->init_req(_slow_path, slow_result); | |
| 3845 result_i_o ->set_req(_slow_path, i_o()); | |
| 3846 result_mem ->set_req(_slow_path, reset_memory()); | |
| 3847 } | |
| 3848 | |
| 3849 // The object is allocated, as an array and/or an instance. Now copy it. | |
| 3850 set_control( _gvn.transform(alloc_reg) ); | |
| 3851 set_i_o( _gvn.transform(alloc_i_o) ); | |
| 3852 set_memory( _gvn.transform(alloc_mem), raw_adr_type ); | |
| 3853 Node* raw_obj = _gvn.transform(alloc_val); | |
| 3854 | |
| 3855 if (!stopped()) { | |
| 3856 // Copy the fastest available way. | |
| 3857 // (No need for PreserveJVMState, since we're using it all up now.) | |
| 163 | 3858 // TODO: generate fields/elements copies for small objects instead. |
| 0 | 3859 Node* src = obj; |
| 3860 Node* dest = raw_obj; | |
| 3861 Node* size = _gvn.transform(alloc_siz); | |
| 3862 | |
| 3863 // Exclude the header. | |
|
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3864 int base_off = instanceOopDesc::base_offset_in_bytes(); |
|
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|
3865 if (UseCompressedOops) { |
| 163 | 3866 assert(base_off % BytesPerLong != 0, "base with compressed oops"); |
| 3867 // With compressed oops base_offset_in_bytes is 12 which creates | |
| 3868 // the gap since countx is rounded by 8 bytes below. | |
| 3869 // Copy klass and the gap. | |
| 3870 base_off = instanceOopDesc::klass_offset_in_bytes(); | |
|
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|
3871 } |
| 0 | 3872 src = basic_plus_adr(src, base_off); |
| 3873 dest = basic_plus_adr(dest, base_off); | |
| 3874 | |
| 3875 // Compute the length also, if needed: | |
| 3876 Node* countx = size; | |
| 3877 countx = _gvn.transform( new (C, 3) SubXNode(countx, MakeConX(base_off)) ); | |
| 3878 countx = _gvn.transform( new (C, 3) URShiftXNode(countx, intcon(LogBytesPerLong) )); | |
| 3879 | |
| 3880 // Select an appropriate instruction to initialize the range. | |
| 3881 // The CopyArray instruction (if supported) can be optimized | |
| 3882 // into a discrete set of scalar loads and stores. | |
| 3883 bool disjoint_bases = true; | |
| 3884 generate_unchecked_arraycopy(raw_adr_type, T_LONG, disjoint_bases, | |
| 3885 src, NULL, dest, NULL, countx); | |
| 3886 | |
| 3887 // Now that the object is properly initialized, type it as an oop. | |
| 3888 // Use a secondary InitializeNode memory barrier. | |
| 3889 InitializeNode* init = insert_mem_bar_volatile(Op_Initialize, raw_adr_idx, | |
| 3890 raw_obj)->as_Initialize(); | |
| 3891 init->set_complete(&_gvn); // (there is no corresponding AllocateNode) | |
| 3892 Node* new_obj = new(C, 2) CheckCastPPNode(control(), raw_obj, | |
| 3893 TypeInstPtr::NOTNULL); | |
| 3894 new_obj = _gvn.transform(new_obj); | |
| 3895 | |
| 3896 // If necessary, emit some card marks afterwards. (Non-arrays only.) | |
| 3897 if (card_mark) { | |
| 3898 Node* no_particular_value = NULL; | |
| 3899 Node* no_particular_field = NULL; | |
| 3900 post_barrier(control(), | |
| 3901 memory(raw_adr_type), | |
| 3902 new_obj, | |
| 3903 no_particular_field, | |
| 3904 raw_adr_idx, | |
| 3905 no_particular_value, | |
| 3906 T_OBJECT, | |
| 3907 false); | |
| 3908 } | |
| 3909 // Present the results of the slow call. | |
| 3910 result_reg->init_req(_fast_path, control()); | |
| 3911 result_val->init_req(_fast_path, new_obj); | |
| 3912 result_i_o ->set_req(_fast_path, i_o()); | |
| 3913 result_mem ->set_req(_fast_path, reset_memory()); | |
| 3914 } | |
| 3915 | |
| 3916 // Return the combined state. | |
| 3917 set_control( _gvn.transform(result_reg) ); | |
| 3918 set_i_o( _gvn.transform(result_i_o) ); | |
| 3919 set_all_memory( _gvn.transform(result_mem) ); | |
| 3920 | |
| 3921 // Cast the result to a sharper type, since we know what clone does. | |
| 3922 Node* new_obj = _gvn.transform(result_val); | |
| 3923 Node* cast = new (C, 2) CheckCastPPNode(control(), new_obj, toop); | |
| 3924 push(_gvn.transform(cast)); | |
| 3925 | |
| 3926 return true; | |
| 3927 } | |
| 3928 | |
| 3929 | |
| 3930 // constants for computing the copy function | |
| 3931 enum { | |
| 3932 COPYFUNC_UNALIGNED = 0, | |
| 3933 COPYFUNC_ALIGNED = 1, // src, dest aligned to HeapWordSize | |
| 3934 COPYFUNC_CONJOINT = 0, | |
| 3935 COPYFUNC_DISJOINT = 2 // src != dest, or transfer can descend | |
| 3936 }; | |
| 3937 | |
| 3938 // Note: The condition "disjoint" applies also for overlapping copies | |
| 3939 // where an descending copy is permitted (i.e., dest_offset <= src_offset). | |
| 3940 static address | |
| 3941 select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name) { | |
| 3942 int selector = | |
| 3943 (aligned ? COPYFUNC_ALIGNED : COPYFUNC_UNALIGNED) + | |
| 3944 (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT); | |
| 3945 | |
| 3946 #define RETURN_STUB(xxx_arraycopy) { \ | |
| 3947 name = #xxx_arraycopy; \ | |
| 3948 return StubRoutines::xxx_arraycopy(); } | |
| 3949 | |
| 3950 switch (t) { | |
| 3951 case T_BYTE: | |
| 3952 case T_BOOLEAN: | |
| 3953 switch (selector) { | |
| 3954 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_arraycopy); | |
| 3955 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_arraycopy); | |
| 3956 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_disjoint_arraycopy); | |
| 3957 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_disjoint_arraycopy); | |
| 3958 } | |
| 3959 case T_CHAR: | |
| 3960 case T_SHORT: | |
| 3961 switch (selector) { | |
| 3962 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_arraycopy); | |
| 3963 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_arraycopy); | |
| 3964 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_disjoint_arraycopy); | |
| 3965 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_disjoint_arraycopy); | |
| 3966 } | |
| 3967 case T_INT: | |
| 3968 case T_FLOAT: | |
| 3969 switch (selector) { | |
| 3970 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_arraycopy); | |
| 3971 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_arraycopy); | |
| 3972 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_disjoint_arraycopy); | |
| 3973 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_disjoint_arraycopy); | |
| 3974 } | |
| 3975 case T_DOUBLE: | |
| 3976 case T_LONG: | |
| 3977 switch (selector) { | |
| 3978 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_arraycopy); | |
| 3979 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_arraycopy); | |
| 3980 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_disjoint_arraycopy); | |
| 3981 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_disjoint_arraycopy); | |
| 3982 } | |
| 3983 case T_ARRAY: | |
| 3984 case T_OBJECT: | |
| 3985 switch (selector) { | |
| 3986 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(oop_arraycopy); | |
| 3987 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_oop_arraycopy); | |
| 3988 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(oop_disjoint_arraycopy); | |
| 3989 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_oop_disjoint_arraycopy); | |
| 3990 } | |
| 3991 default: | |
| 3992 ShouldNotReachHere(); | |
| 3993 return NULL; | |
| 3994 } | |
| 3995 | |
| 3996 #undef RETURN_STUB | |
| 3997 } | |
| 3998 | |
| 3999 //------------------------------basictype2arraycopy---------------------------- | |
| 4000 address LibraryCallKit::basictype2arraycopy(BasicType t, | |
| 4001 Node* src_offset, | |
| 4002 Node* dest_offset, | |
| 4003 bool disjoint_bases, | |
| 4004 const char* &name) { | |
| 4005 const TypeInt* src_offset_inttype = gvn().find_int_type(src_offset);; | |
| 4006 const TypeInt* dest_offset_inttype = gvn().find_int_type(dest_offset);; | |
| 4007 | |
| 4008 bool aligned = false; | |
| 4009 bool disjoint = disjoint_bases; | |
| 4010 | |
| 4011 // if the offsets are the same, we can treat the memory regions as | |
| 4012 // disjoint, because either the memory regions are in different arrays, | |
| 4013 // or they are identical (which we can treat as disjoint.) We can also | |
| 4014 // treat a copy with a destination index less that the source index | |
| 4015 // as disjoint since a low->high copy will work correctly in this case. | |
| 4016 if (src_offset_inttype != NULL && src_offset_inttype->is_con() && | |
| 4017 dest_offset_inttype != NULL && dest_offset_inttype->is_con()) { | |
| 4018 // both indices are constants | |
| 4019 int s_offs = src_offset_inttype->get_con(); | |
| 4020 int d_offs = dest_offset_inttype->get_con(); | |
|
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diff
changeset
|
4021 int element_size = type2aelembytes(t); |
| 0 | 4022 aligned = ((arrayOopDesc::base_offset_in_bytes(t) + s_offs * element_size) % HeapWordSize == 0) && |
| 4023 ((arrayOopDesc::base_offset_in_bytes(t) + d_offs * element_size) % HeapWordSize == 0); | |
| 4024 if (s_offs >= d_offs) disjoint = true; | |
| 4025 } else if (src_offset == dest_offset && src_offset != NULL) { | |
| 4026 // This can occur if the offsets are identical non-constants. | |
| 4027 disjoint = true; | |
| 4028 } | |
| 4029 | |
| 4030 return select_arraycopy_function(t, aligned, disjoint, name); | |
| 4031 } | |
| 4032 | |
| 4033 | |
| 4034 //------------------------------inline_arraycopy----------------------- | |
| 4035 bool LibraryCallKit::inline_arraycopy() { | |
| 4036 // Restore the stack and pop off the arguments. | |
| 4037 int nargs = 5; // 2 oops, 3 ints, no size_t or long | |
| 4038 assert(callee()->signature()->size() == nargs, "copy has 5 arguments"); | |
| 4039 | |
| 4040 Node *src = argument(0); | |
| 4041 Node *src_offset = argument(1); | |
| 4042 Node *dest = argument(2); | |
| 4043 Node *dest_offset = argument(3); | |
| 4044 Node *length = argument(4); | |
| 4045 | |
| 4046 // Compile time checks. If any of these checks cannot be verified at compile time, | |
| 4047 // we do not make a fast path for this call. Instead, we let the call remain as it | |
| 4048 // is. The checks we choose to mandate at compile time are: | |
| 4049 // | |
| 4050 // (1) src and dest are arrays. | |
| 4051 const Type* src_type = src->Value(&_gvn); | |
| 4052 const Type* dest_type = dest->Value(&_gvn); | |
| 4053 const TypeAryPtr* top_src = src_type->isa_aryptr(); | |
| 4054 const TypeAryPtr* top_dest = dest_type->isa_aryptr(); | |
| 4055 if (top_src == NULL || top_src->klass() == NULL || | |
| 4056 top_dest == NULL || top_dest->klass() == NULL) { | |
| 4057 // Conservatively insert a memory barrier on all memory slices. | |
| 4058 // Do not let writes into the source float below the arraycopy. | |
| 4059 insert_mem_bar(Op_MemBarCPUOrder); | |
| 4060 | |
| 4061 // Call StubRoutines::generic_arraycopy stub. | |
| 4062 generate_arraycopy(TypeRawPtr::BOTTOM, T_CONFLICT, | |
| 4063 src, src_offset, dest, dest_offset, length, | |
| 4064 nargs); | |
| 4065 | |
| 4066 // Do not let reads from the destination float above the arraycopy. | |
| 4067 // Since we cannot type the arrays, we don't know which slices | |
| 4068 // might be affected. We could restrict this barrier only to those | |
| 4069 // memory slices which pertain to array elements--but don't bother. | |
| 4070 if (!InsertMemBarAfterArraycopy) | |
| 4071 // (If InsertMemBarAfterArraycopy, there is already one in place.) | |
| 4072 insert_mem_bar(Op_MemBarCPUOrder); | |
| 4073 return true; | |
| 4074 } | |
| 4075 | |
| 4076 // (2) src and dest arrays must have elements of the same BasicType | |
| 4077 // Figure out the size and type of the elements we will be copying. | |
| 4078 BasicType src_elem = top_src->klass()->as_array_klass()->element_type()->basic_type(); | |
| 4079 BasicType dest_elem = top_dest->klass()->as_array_klass()->element_type()->basic_type(); | |
| 4080 if (src_elem == T_ARRAY) src_elem = T_OBJECT; | |
| 4081 if (dest_elem == T_ARRAY) dest_elem = T_OBJECT; | |
| 4082 | |
| 4083 if (src_elem != dest_elem || dest_elem == T_VOID) { | |
| 4084 // The component types are not the same or are not recognized. Punt. | |
| 4085 // (But, avoid the native method wrapper to JVM_ArrayCopy.) | |
| 4086 generate_slow_arraycopy(TypePtr::BOTTOM, | |
| 4087 src, src_offset, dest, dest_offset, length, | |
| 4088 nargs); | |
| 4089 return true; | |
| 4090 } | |
| 4091 | |
| 4092 //--------------------------------------------------------------------------- | |
| 4093 // We will make a fast path for this call to arraycopy. | |
| 4094 | |
| 4095 // We have the following tests left to perform: | |
| 4096 // | |
| 4097 // (3) src and dest must not be null. | |
| 4098 // (4) src_offset must not be negative. | |
| 4099 // (5) dest_offset must not be negative. | |
| 4100 // (6) length must not be negative. | |
| 4101 // (7) src_offset + length must not exceed length of src. | |
| 4102 // (8) dest_offset + length must not exceed length of dest. | |
| 4103 // (9) each element of an oop array must be assignable | |
| 4104 | |
| 4105 RegionNode* slow_region = new (C, 1) RegionNode(1); | |
| 4106 record_for_igvn(slow_region); | |
| 4107 | |
| 4108 // (3) operands must not be null | |
| 4109 // We currently perform our null checks with the do_null_check routine. | |
| 4110 // This means that the null exceptions will be reported in the caller | |
| 4111 // rather than (correctly) reported inside of the native arraycopy call. | |
| 4112 // This should be corrected, given time. We do our null check with the | |
| 4113 // stack pointer restored. | |
| 4114 _sp += nargs; | |
| 4115 src = do_null_check(src, T_ARRAY); | |
| 4116 dest = do_null_check(dest, T_ARRAY); | |
| 4117 _sp -= nargs; | |
| 4118 | |
| 4119 // (4) src_offset must not be negative. | |
| 4120 generate_negative_guard(src_offset, slow_region); | |
| 4121 | |
| 4122 // (5) dest_offset must not be negative. | |
| 4123 generate_negative_guard(dest_offset, slow_region); | |
| 4124 | |
| 4125 // (6) length must not be negative (moved to generate_arraycopy()). | |
| 4126 // generate_negative_guard(length, slow_region); | |
| 4127 | |
| 4128 // (7) src_offset + length must not exceed length of src. | |
| 4129 generate_limit_guard(src_offset, length, | |
| 4130 load_array_length(src), | |
| 4131 slow_region); | |
| 4132 | |
| 4133 // (8) dest_offset + length must not exceed length of dest. | |
| 4134 generate_limit_guard(dest_offset, length, | |
| 4135 load_array_length(dest), | |
| 4136 slow_region); | |
| 4137 | |
| 4138 // (9) each element of an oop array must be assignable | |
| 4139 // The generate_arraycopy subroutine checks this. | |
| 4140 | |
| 4141 // This is where the memory effects are placed: | |
| 4142 const TypePtr* adr_type = TypeAryPtr::get_array_body_type(dest_elem); | |
| 4143 generate_arraycopy(adr_type, dest_elem, | |
| 4144 src, src_offset, dest, dest_offset, length, | |
| 4145 nargs, false, false, slow_region); | |
| 4146 | |
| 4147 return true; | |
| 4148 } | |
| 4149 | |
| 4150 //-----------------------------generate_arraycopy---------------------- | |
| 4151 // Generate an optimized call to arraycopy. | |
| 4152 // Caller must guard against non-arrays. | |
| 4153 // Caller must determine a common array basic-type for both arrays. | |
| 4154 // Caller must validate offsets against array bounds. | |
| 4155 // The slow_region has already collected guard failure paths | |
| 4156 // (such as out of bounds length or non-conformable array types). | |
| 4157 // The generated code has this shape, in general: | |
| 4158 // | |
| 4159 // if (length == 0) return // via zero_path | |
| 4160 // slowval = -1 | |
| 4161 // if (types unknown) { | |
| 4162 // slowval = call generic copy loop | |
| 4163 // if (slowval == 0) return // via checked_path | |
| 4164 // } else if (indexes in bounds) { | |
| 4165 // if ((is object array) && !(array type check)) { | |
| 4166 // slowval = call checked copy loop | |
| 4167 // if (slowval == 0) return // via checked_path | |
| 4168 // } else { | |
| 4169 // call bulk copy loop | |
| 4170 // return // via fast_path | |
| 4171 // } | |
| 4172 // } | |
| 4173 // // adjust params for remaining work: | |
| 4174 // if (slowval != -1) { | |
| 4175 // n = -1^slowval; src_offset += n; dest_offset += n; length -= n | |
| 4176 // } | |
| 4177 // slow_region: | |
| 4178 // call slow arraycopy(src, src_offset, dest, dest_offset, length) | |
| 4179 // return // via slow_call_path | |
| 4180 // | |
| 4181 // This routine is used from several intrinsics: System.arraycopy, | |
| 4182 // Object.clone (the array subcase), and Arrays.copyOf[Range]. | |
| 4183 // | |
| 4184 void | |
| 4185 LibraryCallKit::generate_arraycopy(const TypePtr* adr_type, | |
| 4186 BasicType basic_elem_type, | |
| 4187 Node* src, Node* src_offset, | |
| 4188 Node* dest, Node* dest_offset, | |
| 4189 Node* copy_length, | |
| 4190 int nargs, | |
| 4191 bool disjoint_bases, | |
| 4192 bool length_never_negative, | |
| 4193 RegionNode* slow_region) { | |
| 4194 | |
| 4195 if (slow_region == NULL) { | |
| 4196 slow_region = new(C,1) RegionNode(1); | |
| 4197 record_for_igvn(slow_region); | |
| 4198 } | |
| 4199 | |
| 4200 Node* original_dest = dest; | |
| 4201 AllocateArrayNode* alloc = NULL; // used for zeroing, if needed | |
| 4202 Node* raw_dest = NULL; // used before zeroing, if needed | |
| 4203 bool must_clear_dest = false; | |
| 4204 | |
| 4205 // See if this is the initialization of a newly-allocated array. | |
| 4206 // If so, we will take responsibility here for initializing it to zero. | |
| 4207 // (Note: Because tightly_coupled_allocation performs checks on the | |
| 4208 // out-edges of the dest, we need to avoid making derived pointers | |
| 4209 // from it until we have checked its uses.) | |
| 4210 if (ReduceBulkZeroing | |
| 4211 && !ZeroTLAB // pointless if already zeroed | |
| 4212 && basic_elem_type != T_CONFLICT // avoid corner case | |
| 4213 && !_gvn.eqv_uncast(src, dest) | |
| 4214 && ((alloc = tightly_coupled_allocation(dest, slow_region)) | |
| 4215 != NULL) | |
|
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changeset
|
4216 && _gvn.find_int_con(alloc->in(AllocateNode::ALength), 1) > 0 |
| 0 | 4217 && alloc->maybe_set_complete(&_gvn)) { |
| 4218 // "You break it, you buy it." | |
| 4219 InitializeNode* init = alloc->initialization(); | |
| 4220 assert(init->is_complete(), "we just did this"); | |
| 4221 assert(dest->Opcode() == Op_CheckCastPP, "sanity"); | |
| 4222 assert(dest->in(0)->in(0) == init, "dest pinned"); | |
| 4223 raw_dest = dest->in(1); // grab the raw pointer! | |
| 4224 original_dest = dest; | |
| 4225 dest = raw_dest; | |
| 4226 adr_type = TypeRawPtr::BOTTOM; // all initializations are into raw memory | |
| 4227 // Decouple the original InitializeNode, turning it into a simple membar. | |
| 4228 // We will build a new one at the end of this routine. | |
| 4229 init->set_req(InitializeNode::RawAddress, top()); | |
| 4230 // From this point on, every exit path is responsible for | |
| 4231 // initializing any non-copied parts of the object to zero. | |
| 4232 must_clear_dest = true; | |
| 4233 } else { | |
| 4234 // No zeroing elimination here. | |
| 4235 alloc = NULL; | |
| 4236 //original_dest = dest; | |
| 4237 //must_clear_dest = false; | |
| 4238 } | |
| 4239 | |
| 4240 // Results are placed here: | |
| 4241 enum { fast_path = 1, // normal void-returning assembly stub | |
| 4242 checked_path = 2, // special assembly stub with cleanup | |
| 4243 slow_call_path = 3, // something went wrong; call the VM | |
| 4244 zero_path = 4, // bypass when length of copy is zero | |
| 4245 bcopy_path = 5, // copy primitive array by 64-bit blocks | |
| 4246 PATH_LIMIT = 6 | |
| 4247 }; | |
| 4248 RegionNode* result_region = new(C, PATH_LIMIT) RegionNode(PATH_LIMIT); | |
| 4249 PhiNode* result_i_o = new(C, PATH_LIMIT) PhiNode(result_region, Type::ABIO); | |
| 4250 PhiNode* result_memory = new(C, PATH_LIMIT) PhiNode(result_region, Type::MEMORY, adr_type); | |
| 4251 record_for_igvn(result_region); | |
| 4252 _gvn.set_type_bottom(result_i_o); | |
| 4253 _gvn.set_type_bottom(result_memory); | |
| 4254 assert(adr_type != TypePtr::BOTTOM, "must be RawMem or a T[] slice"); | |
| 4255 | |
| 4256 // The slow_control path: | |
| 4257 Node* slow_control; | |
| 4258 Node* slow_i_o = i_o(); | |
| 4259 Node* slow_mem = memory(adr_type); | |
| 4260 debug_only(slow_control = (Node*) badAddress); | |
| 4261 | |
| 4262 // Checked control path: | |
| 4263 Node* checked_control = top(); | |
| 4264 Node* checked_mem = NULL; | |
| 4265 Node* checked_i_o = NULL; | |
| 4266 Node* checked_value = NULL; | |
| 4267 | |
| 4268 if (basic_elem_type == T_CONFLICT) { | |
| 4269 assert(!must_clear_dest, ""); | |
| 4270 Node* cv = generate_generic_arraycopy(adr_type, | |
| 4271 src, src_offset, dest, dest_offset, | |
| 4272 copy_length, nargs); | |
| 4273 if (cv == NULL) cv = intcon(-1); // failure (no stub available) | |
| 4274 checked_control = control(); | |
| 4275 checked_i_o = i_o(); | |
| 4276 checked_mem = memory(adr_type); | |
| 4277 checked_value = cv; | |
| 4278 set_control(top()); // no fast path | |
| 4279 } | |
| 4280 | |
| 4281 Node* not_pos = generate_nonpositive_guard(copy_length, length_never_negative); | |
| 4282 if (not_pos != NULL) { | |
| 4283 PreserveJVMState pjvms(this); | |
| 4284 set_control(not_pos); | |
| 4285 | |
| 4286 // (6) length must not be negative. | |
| 4287 if (!length_never_negative) { | |
| 4288 generate_negative_guard(copy_length, slow_region); | |
| 4289 } | |
| 4290 | |
| 4291 if (!stopped() && must_clear_dest) { | |
| 4292 Node* dest_length = alloc->in(AllocateNode::ALength); | |
| 4293 if (_gvn.eqv_uncast(copy_length, dest_length) | |
| 4294 || _gvn.find_int_con(dest_length, 1) <= 0) { | |
| 4295 // There is no zeroing to do. | |
| 4296 } else { | |
| 4297 // Clear the whole thing since there are no source elements to copy. | |
| 4298 generate_clear_array(adr_type, dest, basic_elem_type, | |
| 4299 intcon(0), NULL, | |
| 4300 alloc->in(AllocateNode::AllocSize)); | |
| 4301 } | |
| 4302 } | |
| 4303 | |
| 4304 // Present the results of the fast call. | |
| 4305 result_region->init_req(zero_path, control()); | |
| 4306 result_i_o ->init_req(zero_path, i_o()); | |
| 4307 result_memory->init_req(zero_path, memory(adr_type)); | |
| 4308 } | |
| 4309 | |
| 4310 if (!stopped() && must_clear_dest) { | |
| 4311 // We have to initialize the *uncopied* part of the array to zero. | |
| 4312 // The copy destination is the slice dest[off..off+len]. The other slices | |
| 4313 // are dest_head = dest[0..off] and dest_tail = dest[off+len..dest.length]. | |
| 4314 Node* dest_size = alloc->in(AllocateNode::AllocSize); | |
| 4315 Node* dest_length = alloc->in(AllocateNode::ALength); | |
| 4316 Node* dest_tail = _gvn.transform( new(C,3) AddINode(dest_offset, | |
| 4317 copy_length) ); | |
| 4318 | |
| 4319 // If there is a head section that needs zeroing, do it now. | |
| 4320 if (find_int_con(dest_offset, -1) != 0) { | |
| 4321 generate_clear_array(adr_type, dest, basic_elem_type, | |
| 4322 intcon(0), dest_offset, | |
| 4323 NULL); | |
| 4324 } | |
| 4325 | |
| 4326 // Next, perform a dynamic check on the tail length. | |
| 4327 // It is often zero, and we can win big if we prove this. | |
| 4328 // There are two wins: Avoid generating the ClearArray | |
| 4329 // with its attendant messy index arithmetic, and upgrade | |
| 4330 // the copy to a more hardware-friendly word size of 64 bits. | |
| 4331 Node* tail_ctl = NULL; | |
| 4332 if (!stopped() && !_gvn.eqv_uncast(dest_tail, dest_length)) { | |
| 4333 Node* cmp_lt = _gvn.transform( new(C,3) CmpINode(dest_tail, dest_length) ); | |
| 4334 Node* bol_lt = _gvn.transform( new(C,2) BoolNode(cmp_lt, BoolTest::lt) ); | |
| 4335 tail_ctl = generate_slow_guard(bol_lt, NULL); | |
| 4336 assert(tail_ctl != NULL || !stopped(), "must be an outcome"); | |
| 4337 } | |
| 4338 | |
| 4339 // At this point, let's assume there is no tail. | |
| 4340 if (!stopped() && alloc != NULL && basic_elem_type != T_OBJECT) { | |
| 4341 // There is no tail. Try an upgrade to a 64-bit copy. | |
| 4342 bool didit = false; | |
| 4343 { PreserveJVMState pjvms(this); | |
| 4344 didit = generate_block_arraycopy(adr_type, basic_elem_type, alloc, | |
| 4345 src, src_offset, dest, dest_offset, | |
| 4346 dest_size); | |
| 4347 if (didit) { | |
| 4348 // Present the results of the block-copying fast call. | |
| 4349 result_region->init_req(bcopy_path, control()); | |
| 4350 result_i_o ->init_req(bcopy_path, i_o()); | |
| 4351 result_memory->init_req(bcopy_path, memory(adr_type)); | |
| 4352 } | |
| 4353 } | |
| 4354 if (didit) | |
| 4355 set_control(top()); // no regular fast path | |
| 4356 } | |
| 4357 | |
| 4358 // Clear the tail, if any. | |
| 4359 if (tail_ctl != NULL) { | |
| 4360 Node* notail_ctl = stopped() ? NULL : control(); | |
| 4361 set_control(tail_ctl); | |
| 4362 if (notail_ctl == NULL) { | |
| 4363 generate_clear_array(adr_type, dest, basic_elem_type, | |
| 4364 dest_tail, NULL, | |
| 4365 dest_size); | |
| 4366 } else { | |
| 4367 // Make a local merge. | |
| 4368 Node* done_ctl = new(C,3) RegionNode(3); | |
| 4369 Node* done_mem = new(C,3) PhiNode(done_ctl, Type::MEMORY, adr_type); | |
| 4370 done_ctl->init_req(1, notail_ctl); | |
| 4371 done_mem->init_req(1, memory(adr_type)); | |
| 4372 generate_clear_array(adr_type, dest, basic_elem_type, | |
| 4373 dest_tail, NULL, | |
| 4374 dest_size); | |
| 4375 done_ctl->init_req(2, control()); | |
| 4376 done_mem->init_req(2, memory(adr_type)); | |
| 4377 set_control( _gvn.transform(done_ctl) ); | |
| 4378 set_memory( _gvn.transform(done_mem), adr_type ); | |
| 4379 } | |
| 4380 } | |
| 4381 } | |
| 4382 | |
| 4383 BasicType copy_type = basic_elem_type; | |
| 4384 assert(basic_elem_type != T_ARRAY, "caller must fix this"); | |
| 4385 if (!stopped() && copy_type == T_OBJECT) { | |
| 4386 // If src and dest have compatible element types, we can copy bits. | |
| 4387 // Types S[] and D[] are compatible if D is a supertype of S. | |
| 4388 // | |
| 4389 // If they are not, we will use checked_oop_disjoint_arraycopy, | |
| 4390 // which performs a fast optimistic per-oop check, and backs off | |
| 4391 // further to JVM_ArrayCopy on the first per-oop check that fails. | |
| 4392 // (Actually, we don't move raw bits only; the GC requires card marks.) | |
| 4393 | |
| 4394 // Get the klassOop for both src and dest | |
| 4395 Node* src_klass = load_object_klass(src); | |
| 4396 Node* dest_klass = load_object_klass(dest); | |
| 4397 | |
| 4398 // Generate the subtype check. | |
| 4399 // This might fold up statically, or then again it might not. | |
| 4400 // | |
| 4401 // Non-static example: Copying List<String>.elements to a new String[]. | |
| 4402 // The backing store for a List<String> is always an Object[], | |
| 4403 // but its elements are always type String, if the generic types | |
| 4404 // are correct at the source level. | |
| 4405 // | |
| 4406 // Test S[] against D[], not S against D, because (probably) | |
| 4407 // the secondary supertype cache is less busy for S[] than S. | |
| 4408 // This usually only matters when D is an interface. | |
| 4409 Node* not_subtype_ctrl = gen_subtype_check(src_klass, dest_klass); | |
| 4410 // Plug failing path into checked_oop_disjoint_arraycopy | |
| 4411 if (not_subtype_ctrl != top()) { | |
| 4412 PreserveJVMState pjvms(this); | |
| 4413 set_control(not_subtype_ctrl); | |
| 4414 // (At this point we can assume disjoint_bases, since types differ.) | |
| 4415 int ek_offset = objArrayKlass::element_klass_offset_in_bytes() + sizeof(oopDesc); | |
| 4416 Node* p1 = basic_plus_adr(dest_klass, ek_offset); | |
|
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4417 Node* n1 = LoadKlassNode::make(_gvn, immutable_memory(), p1, TypeRawPtr::BOTTOM); |
| 0 | 4418 Node* dest_elem_klass = _gvn.transform(n1); |
| 4419 Node* cv = generate_checkcast_arraycopy(adr_type, | |
| 4420 dest_elem_klass, | |
| 4421 src, src_offset, dest, dest_offset, | |
| 4422 copy_length, | |
| 4423 nargs); | |
| 4424 if (cv == NULL) cv = intcon(-1); // failure (no stub available) | |
| 4425 checked_control = control(); | |
| 4426 checked_i_o = i_o(); | |
| 4427 checked_mem = memory(adr_type); | |
| 4428 checked_value = cv; | |
| 4429 } | |
| 4430 // At this point we know we do not need type checks on oop stores. | |
| 4431 | |
| 4432 // Let's see if we need card marks: | |
| 4433 if (alloc != NULL && use_ReduceInitialCardMarks()) { | |
| 4434 // If we do not need card marks, copy using the jint or jlong stub. | |
|
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4435 copy_type = LP64_ONLY(UseCompressedOops ? T_INT : T_LONG) NOT_LP64(T_INT); |
|
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4436 assert(type2aelembytes(basic_elem_type) == type2aelembytes(copy_type), |
| 0 | 4437 "sizes agree"); |
| 4438 } | |
| 4439 } | |
| 4440 | |
| 4441 if (!stopped()) { | |
| 4442 // Generate the fast path, if possible. | |
| 4443 PreserveJVMState pjvms(this); | |
| 4444 generate_unchecked_arraycopy(adr_type, copy_type, disjoint_bases, | |
| 4445 src, src_offset, dest, dest_offset, | |
| 4446 ConvI2X(copy_length)); | |
| 4447 | |
| 4448 // Present the results of the fast call. | |
| 4449 result_region->init_req(fast_path, control()); | |
| 4450 result_i_o ->init_req(fast_path, i_o()); | |
| 4451 result_memory->init_req(fast_path, memory(adr_type)); | |
| 4452 } | |
| 4453 | |
| 4454 // Here are all the slow paths up to this point, in one bundle: | |
| 4455 slow_control = top(); | |
| 4456 if (slow_region != NULL) | |
| 4457 slow_control = _gvn.transform(slow_region); | |
| 4458 debug_only(slow_region = (RegionNode*)badAddress); | |
| 4459 | |
| 4460 set_control(checked_control); | |
| 4461 if (!stopped()) { | |
| 4462 // Clean up after the checked call. | |
| 4463 // The returned value is either 0 or -1^K, | |
| 4464 // where K = number of partially transferred array elements. | |
| 4465 Node* cmp = _gvn.transform( new(C, 3) CmpINode(checked_value, intcon(0)) ); | |
| 4466 Node* bol = _gvn.transform( new(C, 2) BoolNode(cmp, BoolTest::eq) ); | |
| 4467 IfNode* iff = create_and_map_if(control(), bol, PROB_MAX, COUNT_UNKNOWN); | |
| 4468 | |
| 4469 // If it is 0, we are done, so transfer to the end. | |
| 4470 Node* checks_done = _gvn.transform( new(C, 1) IfTrueNode(iff) ); | |
| 4471 result_region->init_req(checked_path, checks_done); | |
| 4472 result_i_o ->init_req(checked_path, checked_i_o); | |
| 4473 result_memory->init_req(checked_path, checked_mem); | |
| 4474 | |
| 4475 // If it is not zero, merge into the slow call. | |
| 4476 set_control( _gvn.transform( new(C, 1) IfFalseNode(iff) )); | |
| 4477 RegionNode* slow_reg2 = new(C, 3) RegionNode(3); | |
| 4478 PhiNode* slow_i_o2 = new(C, 3) PhiNode(slow_reg2, Type::ABIO); | |
| 4479 PhiNode* slow_mem2 = new(C, 3) PhiNode(slow_reg2, Type::MEMORY, adr_type); | |
| 4480 record_for_igvn(slow_reg2); | |
| 4481 slow_reg2 ->init_req(1, slow_control); | |
| 4482 slow_i_o2 ->init_req(1, slow_i_o); | |
| 4483 slow_mem2 ->init_req(1, slow_mem); | |
| 4484 slow_reg2 ->init_req(2, control()); | |
| 4485 slow_i_o2 ->init_req(2, i_o()); | |
| 4486 slow_mem2 ->init_req(2, memory(adr_type)); | |
| 4487 | |
| 4488 slow_control = _gvn.transform(slow_reg2); | |
| 4489 slow_i_o = _gvn.transform(slow_i_o2); | |
| 4490 slow_mem = _gvn.transform(slow_mem2); | |
| 4491 | |
| 4492 if (alloc != NULL) { | |
| 4493 // We'll restart from the very beginning, after zeroing the whole thing. | |
| 4494 // This can cause double writes, but that's OK since dest is brand new. | |
| 4495 // So we ignore the low 31 bits of the value returned from the stub. | |
| 4496 } else { | |
| 4497 // We must continue the copy exactly where it failed, or else | |
| 4498 // another thread might see the wrong number of writes to dest. | |
| 4499 Node* checked_offset = _gvn.transform( new(C, 3) XorINode(checked_value, intcon(-1)) ); | |
| 4500 Node* slow_offset = new(C, 3) PhiNode(slow_reg2, TypeInt::INT); | |
| 4501 slow_offset->init_req(1, intcon(0)); | |
| 4502 slow_offset->init_req(2, checked_offset); | |
| 4503 slow_offset = _gvn.transform(slow_offset); | |
| 4504 | |
| 4505 // Adjust the arguments by the conditionally incoming offset. | |
| 4506 Node* src_off_plus = _gvn.transform( new(C, 3) AddINode(src_offset, slow_offset) ); | |
| 4507 Node* dest_off_plus = _gvn.transform( new(C, 3) AddINode(dest_offset, slow_offset) ); | |
| 4508 Node* length_minus = _gvn.transform( new(C, 3) SubINode(copy_length, slow_offset) ); | |
| 4509 | |
| 4510 // Tweak the node variables to adjust the code produced below: | |
| 4511 src_offset = src_off_plus; | |
| 4512 dest_offset = dest_off_plus; | |
| 4513 copy_length = length_minus; | |
| 4514 } | |
| 4515 } | |
| 4516 | |
| 4517 set_control(slow_control); | |
| 4518 if (!stopped()) { | |
| 4519 // Generate the slow path, if needed. | |
| 4520 PreserveJVMState pjvms(this); // replace_in_map may trash the map | |
| 4521 | |
| 4522 set_memory(slow_mem, adr_type); | |
| 4523 set_i_o(slow_i_o); | |
| 4524 | |
| 4525 if (must_clear_dest) { | |
| 4526 generate_clear_array(adr_type, dest, basic_elem_type, | |
| 4527 intcon(0), NULL, | |
| 4528 alloc->in(AllocateNode::AllocSize)); | |
| 4529 } | |
| 4530 | |
| 4531 if (dest != original_dest) { | |
| 4532 // Promote from rawptr to oop, so it looks right in the call's GC map. | |
| 4533 dest = _gvn.transform( new(C,2) CheckCastPPNode(control(), dest, | |
| 4534 TypeInstPtr::NOTNULL) ); | |
| 4535 | |
| 4536 // Edit the call's debug-info to avoid referring to original_dest. | |
| 4537 // (The problem with original_dest is that it isn't ready until | |
| 4538 // after the InitializeNode completes, but this stuff is before.) | |
| 4539 // Substitute in the locally valid dest_oop. | |
| 4540 replace_in_map(original_dest, dest); | |
| 4541 } | |
| 4542 | |
| 4543 generate_slow_arraycopy(adr_type, | |
| 4544 src, src_offset, dest, dest_offset, | |
| 4545 copy_length, nargs); | |
| 4546 | |
| 4547 result_region->init_req(slow_call_path, control()); | |
| 4548 result_i_o ->init_req(slow_call_path, i_o()); | |
| 4549 result_memory->init_req(slow_call_path, memory(adr_type)); | |
| 4550 } | |
| 4551 | |
| 4552 // Remove unused edges. | |
| 4553 for (uint i = 1; i < result_region->req(); i++) { | |
| 4554 if (result_region->in(i) == NULL) | |
| 4555 result_region->init_req(i, top()); | |
| 4556 } | |
| 4557 | |
| 4558 // Finished; return the combined state. | |
| 4559 set_control( _gvn.transform(result_region) ); | |
| 4560 set_i_o( _gvn.transform(result_i_o) ); | |
| 4561 set_memory( _gvn.transform(result_memory), adr_type ); | |
| 4562 | |
| 4563 if (dest != original_dest) { | |
| 4564 // Pin the "finished" array node after the arraycopy/zeroing operations. | |
| 4565 // Use a secondary InitializeNode memory barrier. | |
| 4566 InitializeNode* init = insert_mem_bar_volatile(Op_Initialize, | |
| 4567 Compile::AliasIdxRaw, | |
| 4568 raw_dest)->as_Initialize(); | |
| 4569 init->set_complete(&_gvn); // (there is no corresponding AllocateNode) | |
| 4570 _gvn.hash_delete(original_dest); | |
| 4571 original_dest->set_req(0, control()); | |
| 4572 _gvn.hash_find_insert(original_dest); // put back into GVN table | |
| 4573 } | |
| 4574 | |
| 4575 // The memory edges above are precise in order to model effects around | |
| 4576 // array copyies accurately to allow value numbering of field loads around | |
| 4577 // arraycopy. Such field loads, both before and after, are common in Java | |
| 4578 // collections and similar classes involving header/array data structures. | |
| 4579 // | |
| 4580 // But with low number of register or when some registers are used or killed | |
| 4581 // by arraycopy calls it causes registers spilling on stack. See 6544710. | |
| 4582 // The next memory barrier is added to avoid it. If the arraycopy can be | |
| 4583 // optimized away (which it can, sometimes) then we can manually remove | |
| 4584 // the membar also. | |
| 4585 if (InsertMemBarAfterArraycopy) | |
| 4586 insert_mem_bar(Op_MemBarCPUOrder); | |
| 4587 } | |
| 4588 | |
| 4589 | |
| 4590 // Helper function which determines if an arraycopy immediately follows | |
| 4591 // an allocation, with no intervening tests or other escapes for the object. | |
| 4592 AllocateArrayNode* | |
| 4593 LibraryCallKit::tightly_coupled_allocation(Node* ptr, | |
| 4594 RegionNode* slow_region) { | |
| 4595 if (stopped()) return NULL; // no fast path | |
| 4596 if (C->AliasLevel() == 0) return NULL; // no MergeMems around | |
| 4597 | |
| 4598 AllocateArrayNode* alloc = AllocateArrayNode::Ideal_array_allocation(ptr, &_gvn); | |
| 4599 if (alloc == NULL) return NULL; | |
| 4600 | |
| 4601 Node* rawmem = memory(Compile::AliasIdxRaw); | |
| 4602 // Is the allocation's memory state untouched? | |
| 4603 if (!(rawmem->is_Proj() && rawmem->in(0)->is_Initialize())) { | |
| 4604 // Bail out if there have been raw-memory effects since the allocation. | |
| 4605 // (Example: There might have been a call or safepoint.) | |
| 4606 return NULL; | |
| 4607 } | |
| 4608 rawmem = rawmem->in(0)->as_Initialize()->memory(Compile::AliasIdxRaw); | |
| 4609 if (!(rawmem->is_Proj() && rawmem->in(0) == alloc)) { | |
| 4610 return NULL; | |
| 4611 } | |
| 4612 | |
| 4613 // There must be no unexpected observers of this allocation. | |
| 4614 for (DUIterator_Fast imax, i = ptr->fast_outs(imax); i < imax; i++) { | |
| 4615 Node* obs = ptr->fast_out(i); | |
| 4616 if (obs != this->map()) { | |
| 4617 return NULL; | |
| 4618 } | |
| 4619 } | |
| 4620 | |
| 4621 // This arraycopy must unconditionally follow the allocation of the ptr. | |
| 4622 Node* alloc_ctl = ptr->in(0); | |
| 4623 assert(just_allocated_object(alloc_ctl) == ptr, "most recent allo"); | |
| 4624 | |
| 4625 Node* ctl = control(); | |
| 4626 while (ctl != alloc_ctl) { | |
| 4627 // There may be guards which feed into the slow_region. | |
| 4628 // Any other control flow means that we might not get a chance | |
| 4629 // to finish initializing the allocated object. | |
| 4630 if ((ctl->is_IfFalse() || ctl->is_IfTrue()) && ctl->in(0)->is_If()) { | |
| 4631 IfNode* iff = ctl->in(0)->as_If(); | |
| 4632 Node* not_ctl = iff->proj_out(1 - ctl->as_Proj()->_con); | |
| 4633 assert(not_ctl != NULL && not_ctl != ctl, "found alternate"); | |
| 4634 if (slow_region != NULL && slow_region->find_edge(not_ctl) >= 1) { | |
| 4635 ctl = iff->in(0); // This test feeds the known slow_region. | |
| 4636 continue; | |
| 4637 } | |
| 4638 // One more try: Various low-level checks bottom out in | |
| 4639 // uncommon traps. If the debug-info of the trap omits | |
| 4640 // any reference to the allocation, as we've already | |
| 4641 // observed, then there can be no objection to the trap. | |
| 4642 bool found_trap = false; | |
| 4643 for (DUIterator_Fast jmax, j = not_ctl->fast_outs(jmax); j < jmax; j++) { | |
| 4644 Node* obs = not_ctl->fast_out(j); | |
| 4645 if (obs->in(0) == not_ctl && obs->is_Call() && | |
| 4646 (obs->as_Call()->entry_point() == | |
| 4647 SharedRuntime::uncommon_trap_blob()->instructions_begin())) { | |
| 4648 found_trap = true; break; | |
| 4649 } | |
| 4650 } | |
| 4651 if (found_trap) { | |
| 4652 ctl = iff->in(0); // This test feeds a harmless uncommon trap. | |
| 4653 continue; | |
| 4654 } | |
| 4655 } | |
| 4656 return NULL; | |
| 4657 } | |
| 4658 | |
| 4659 // If we get this far, we have an allocation which immediately | |
| 4660 // precedes the arraycopy, and we can take over zeroing the new object. | |
| 4661 // The arraycopy will finish the initialization, and provide | |
| 4662 // a new control state to which we will anchor the destination pointer. | |
| 4663 | |
| 4664 return alloc; | |
| 4665 } | |
| 4666 | |
| 4667 // Helper for initialization of arrays, creating a ClearArray. | |
| 4668 // It writes zero bits in [start..end), within the body of an array object. | |
| 4669 // The memory effects are all chained onto the 'adr_type' alias category. | |
| 4670 // | |
| 4671 // Since the object is otherwise uninitialized, we are free | |
| 4672 // to put a little "slop" around the edges of the cleared area, | |
| 4673 // as long as it does not go back into the array's header, | |
| 4674 // or beyond the array end within the heap. | |
| 4675 // | |
| 4676 // The lower edge can be rounded down to the nearest jint and the | |
| 4677 // upper edge can be rounded up to the nearest MinObjAlignmentInBytes. | |
| 4678 // | |
| 4679 // Arguments: | |
| 4680 // adr_type memory slice where writes are generated | |
| 4681 // dest oop of the destination array | |
| 4682 // basic_elem_type element type of the destination | |
| 4683 // slice_idx array index of first element to store | |
| 4684 // slice_len number of elements to store (or NULL) | |
| 4685 // dest_size total size in bytes of the array object | |
| 4686 // | |
| 4687 // Exactly one of slice_len or dest_size must be non-NULL. | |
| 4688 // If dest_size is non-NULL, zeroing extends to the end of the object. | |
| 4689 // If slice_len is non-NULL, the slice_idx value must be a constant. | |
| 4690 void | |
| 4691 LibraryCallKit::generate_clear_array(const TypePtr* adr_type, | |
| 4692 Node* dest, | |
| 4693 BasicType basic_elem_type, | |
| 4694 Node* slice_idx, | |
| 4695 Node* slice_len, | |
| 4696 Node* dest_size) { | |
| 4697 // one or the other but not both of slice_len and dest_size: | |
| 4698 assert((slice_len != NULL? 1: 0) + (dest_size != NULL? 1: 0) == 1, ""); | |
| 4699 if (slice_len == NULL) slice_len = top(); | |
| 4700 if (dest_size == NULL) dest_size = top(); | |
| 4701 | |
| 4702 // operate on this memory slice: | |
| 4703 Node* mem = memory(adr_type); // memory slice to operate on | |
| 4704 | |
| 4705 // scaling and rounding of indexes: | |
|
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4706 int scale = exact_log2(type2aelembytes(basic_elem_type)); |
| 0 | 4707 int abase = arrayOopDesc::base_offset_in_bytes(basic_elem_type); |
| 4708 int clear_low = (-1 << scale) & (BytesPerInt - 1); | |
| 4709 int bump_bit = (-1 << scale) & BytesPerInt; | |
| 4710 | |
| 4711 // determine constant starts and ends | |
| 4712 const intptr_t BIG_NEG = -128; | |
| 4713 assert(BIG_NEG + 2*abase < 0, "neg enough"); | |
| 4714 intptr_t slice_idx_con = (intptr_t) find_int_con(slice_idx, BIG_NEG); | |
| 4715 intptr_t slice_len_con = (intptr_t) find_int_con(slice_len, BIG_NEG); | |
| 4716 if (slice_len_con == 0) { | |
| 4717 return; // nothing to do here | |
| 4718 } | |
| 4719 intptr_t start_con = (abase + (slice_idx_con << scale)) & ~clear_low; | |
| 4720 intptr_t end_con = find_intptr_t_con(dest_size, -1); | |
| 4721 if (slice_idx_con >= 0 && slice_len_con >= 0) { | |
| 4722 assert(end_con < 0, "not two cons"); | |
| 4723 end_con = round_to(abase + ((slice_idx_con + slice_len_con) << scale), | |
| 4724 BytesPerLong); | |
| 4725 } | |
| 4726 | |
| 4727 if (start_con >= 0 && end_con >= 0) { | |
| 4728 // Constant start and end. Simple. | |
| 4729 mem = ClearArrayNode::clear_memory(control(), mem, dest, | |
| 4730 start_con, end_con, &_gvn); | |
| 4731 } else if (start_con >= 0 && dest_size != top()) { | |
| 4732 // Constant start, pre-rounded end after the tail of the array. | |
| 4733 Node* end = dest_size; | |
| 4734 mem = ClearArrayNode::clear_memory(control(), mem, dest, | |
| 4735 start_con, end, &_gvn); | |
| 4736 } else if (start_con >= 0 && slice_len != top()) { | |
| 4737 // Constant start, non-constant end. End needs rounding up. | |
| 4738 // End offset = round_up(abase + ((slice_idx_con + slice_len) << scale), 8) | |
| 4739 intptr_t end_base = abase + (slice_idx_con << scale); | |
| 4740 int end_round = (-1 << scale) & (BytesPerLong - 1); | |
| 4741 Node* end = ConvI2X(slice_len); | |
| 4742 if (scale != 0) | |
| 4743 end = _gvn.transform( new(C,3) LShiftXNode(end, intcon(scale) )); | |
| 4744 end_base += end_round; | |
| 4745 end = _gvn.transform( new(C,3) AddXNode(end, MakeConX(end_base)) ); | |
| 4746 end = _gvn.transform( new(C,3) AndXNode(end, MakeConX(~end_round)) ); | |
| 4747 mem = ClearArrayNode::clear_memory(control(), mem, dest, | |
| 4748 start_con, end, &_gvn); | |
| 4749 } else if (start_con < 0 && dest_size != top()) { | |
| 4750 // Non-constant start, pre-rounded end after the tail of the array. | |
| 4751 // This is almost certainly a "round-to-end" operation. | |
| 4752 Node* start = slice_idx; | |
| 4753 start = ConvI2X(start); | |
| 4754 if (scale != 0) | |
| 4755 start = _gvn.transform( new(C,3) LShiftXNode( start, intcon(scale) )); | |
| 4756 start = _gvn.transform( new(C,3) AddXNode(start, MakeConX(abase)) ); | |
| 4757 if ((bump_bit | clear_low) != 0) { | |
| 4758 int to_clear = (bump_bit | clear_low); | |
| 4759 // Align up mod 8, then store a jint zero unconditionally | |
| 4760 // just before the mod-8 boundary. | |
|
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4761 if (((abase + bump_bit) & ~to_clear) - bump_bit |
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4762 < arrayOopDesc::length_offset_in_bytes() + BytesPerInt) { |
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4763 bump_bit = 0; |
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4764 assert((abase & to_clear) == 0, "array base must be long-aligned"); |
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4765 } else { |
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4766 // Bump 'start' up to (or past) the next jint boundary: |
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4767 start = _gvn.transform( new(C,3) AddXNode(start, MakeConX(bump_bit)) ); |
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4768 assert((abase & clear_low) == 0, "array base must be int-aligned"); |
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4769 } |
| 0 | 4770 // Round bumped 'start' down to jlong boundary in body of array. |
| 4771 start = _gvn.transform( new(C,3) AndXNode(start, MakeConX(~to_clear)) ); | |
|
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4772 if (bump_bit != 0) { |
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4773 // Store a zero to the immediately preceding jint: |
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4774 Node* x1 = _gvn.transform( new(C,3) AddXNode(start, MakeConX(-bump_bit)) ); |
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4775 Node* p1 = basic_plus_adr(dest, x1); |
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4776 mem = StoreNode::make(_gvn, control(), mem, p1, adr_type, intcon(0), T_INT); |
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4777 mem = _gvn.transform(mem); |
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4778 } |
| 0 | 4779 } |
| 4780 Node* end = dest_size; // pre-rounded | |
| 4781 mem = ClearArrayNode::clear_memory(control(), mem, dest, | |
| 4782 start, end, &_gvn); | |
| 4783 } else { | |
| 4784 // Non-constant start, unrounded non-constant end. | |
| 4785 // (Nobody zeroes a random midsection of an array using this routine.) | |
| 4786 ShouldNotReachHere(); // fix caller | |
| 4787 } | |
| 4788 | |
| 4789 // Done. | |
| 4790 set_memory(mem, adr_type); | |
| 4791 } | |
| 4792 | |
| 4793 | |
| 4794 bool | |
| 4795 LibraryCallKit::generate_block_arraycopy(const TypePtr* adr_type, | |
| 4796 BasicType basic_elem_type, | |
| 4797 AllocateNode* alloc, | |
| 4798 Node* src, Node* src_offset, | |
| 4799 Node* dest, Node* dest_offset, | |
| 4800 Node* dest_size) { | |
| 4801 // See if there is an advantage from block transfer. | |
|
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4802 int scale = exact_log2(type2aelembytes(basic_elem_type)); |
| 0 | 4803 if (scale >= LogBytesPerLong) |
| 4804 return false; // it is already a block transfer | |
| 4805 | |
| 4806 // Look at the alignment of the starting offsets. | |
| 4807 int abase = arrayOopDesc::base_offset_in_bytes(basic_elem_type); | |
| 4808 const intptr_t BIG_NEG = -128; | |
| 4809 assert(BIG_NEG + 2*abase < 0, "neg enough"); | |
| 4810 | |
| 4811 intptr_t src_off = abase + ((intptr_t) find_int_con(src_offset, -1) << scale); | |
| 4812 intptr_t dest_off = abase + ((intptr_t) find_int_con(dest_offset, -1) << scale); | |
| 4813 if (src_off < 0 || dest_off < 0) | |
| 4814 // At present, we can only understand constants. | |
| 4815 return false; | |
| 4816 | |
| 4817 if (((src_off | dest_off) & (BytesPerLong-1)) != 0) { | |
| 4818 // Non-aligned; too bad. | |
| 4819 // One more chance: Pick off an initial 32-bit word. | |
| 4820 // This is a common case, since abase can be odd mod 8. | |
| 4821 if (((src_off | dest_off) & (BytesPerLong-1)) == BytesPerInt && | |
| 4822 ((src_off ^ dest_off) & (BytesPerLong-1)) == 0) { | |
| 4823 Node* sptr = basic_plus_adr(src, src_off); | |
| 4824 Node* dptr = basic_plus_adr(dest, dest_off); | |
| 4825 Node* sval = make_load(control(), sptr, TypeInt::INT, T_INT, adr_type); | |
| 4826 store_to_memory(control(), dptr, sval, T_INT, adr_type); | |
| 4827 src_off += BytesPerInt; | |
| 4828 dest_off += BytesPerInt; | |
| 4829 } else { | |
| 4830 return false; | |
| 4831 } | |
| 4832 } | |
| 4833 assert(src_off % BytesPerLong == 0, ""); | |
| 4834 assert(dest_off % BytesPerLong == 0, ""); | |
| 4835 | |
| 4836 // Do this copy by giant steps. | |
| 4837 Node* sptr = basic_plus_adr(src, src_off); | |
| 4838 Node* dptr = basic_plus_adr(dest, dest_off); | |
| 4839 Node* countx = dest_size; | |
| 4840 countx = _gvn.transform( new (C, 3) SubXNode(countx, MakeConX(dest_off)) ); | |
| 4841 countx = _gvn.transform( new (C, 3) URShiftXNode(countx, intcon(LogBytesPerLong)) ); | |
| 4842 | |
| 4843 bool disjoint_bases = true; // since alloc != NULL | |
| 4844 generate_unchecked_arraycopy(adr_type, T_LONG, disjoint_bases, | |
| 4845 sptr, NULL, dptr, NULL, countx); | |
| 4846 | |
| 4847 return true; | |
| 4848 } | |
| 4849 | |
| 4850 | |
| 4851 // Helper function; generates code for the slow case. | |
| 4852 // We make a call to a runtime method which emulates the native method, | |
| 4853 // but without the native wrapper overhead. | |
| 4854 void | |
| 4855 LibraryCallKit::generate_slow_arraycopy(const TypePtr* adr_type, | |
| 4856 Node* src, Node* src_offset, | |
| 4857 Node* dest, Node* dest_offset, | |
| 4858 Node* copy_length, | |
| 4859 int nargs) { | |
| 4860 _sp += nargs; // any deopt will start just before call to enclosing method | |
| 4861 Node* call = make_runtime_call(RC_NO_LEAF | RC_UNCOMMON, | |
| 4862 OptoRuntime::slow_arraycopy_Type(), | |
| 4863 OptoRuntime::slow_arraycopy_Java(), | |
| 4864 "slow_arraycopy", adr_type, | |
| 4865 src, src_offset, dest, dest_offset, | |
| 4866 copy_length); | |
| 4867 _sp -= nargs; | |
| 4868 | |
| 4869 // Handle exceptions thrown by this fellow: | |
| 4870 make_slow_call_ex(call, env()->Throwable_klass(), false); | |
| 4871 } | |
| 4872 | |
| 4873 // Helper function; generates code for cases requiring runtime checks. | |
| 4874 Node* | |
| 4875 LibraryCallKit::generate_checkcast_arraycopy(const TypePtr* adr_type, | |
| 4876 Node* dest_elem_klass, | |
| 4877 Node* src, Node* src_offset, | |
| 4878 Node* dest, Node* dest_offset, | |
| 4879 Node* copy_length, | |
| 4880 int nargs) { | |
| 4881 if (stopped()) return NULL; | |
| 4882 | |
| 4883 address copyfunc_addr = StubRoutines::checkcast_arraycopy(); | |
| 4884 if (copyfunc_addr == NULL) { // Stub was not generated, go slow path. | |
| 4885 return NULL; | |
| 4886 } | |
| 4887 | |
| 4888 // Pick out the parameters required to perform a store-check | |
| 4889 // for the target array. This is an optimistic check. It will | |
| 4890 // look in each non-null element's class, at the desired klass's | |
| 4891 // super_check_offset, for the desired klass. | |
| 4892 int sco_offset = Klass::super_check_offset_offset_in_bytes() + sizeof(oopDesc); | |
| 4893 Node* p3 = basic_plus_adr(dest_elem_klass, sco_offset); | |
| 4894 Node* n3 = new(C, 3) LoadINode(NULL, immutable_memory(), p3, TypeRawPtr::BOTTOM); | |
| 4895 Node* check_offset = _gvn.transform(n3); | |
| 4896 Node* check_value = dest_elem_klass; | |
| 4897 | |
| 4898 Node* src_start = array_element_address(src, src_offset, T_OBJECT); | |
| 4899 Node* dest_start = array_element_address(dest, dest_offset, T_OBJECT); | |
| 4900 | |
| 4901 // (We know the arrays are never conjoint, because their types differ.) | |
| 4902 Node* call = make_runtime_call(RC_LEAF|RC_NO_FP, | |
| 4903 OptoRuntime::checkcast_arraycopy_Type(), | |
| 4904 copyfunc_addr, "checkcast_arraycopy", adr_type, | |
| 4905 // five arguments, of which two are | |
| 4906 // intptr_t (jlong in LP64) | |
| 4907 src_start, dest_start, | |
| 4908 copy_length XTOP, | |
| 4909 check_offset XTOP, | |
| 4910 check_value); | |
| 4911 | |
| 4912 return _gvn.transform(new (C, 1) ProjNode(call, TypeFunc::Parms)); | |
| 4913 } | |
| 4914 | |
| 4915 | |
| 4916 // Helper function; generates code for cases requiring runtime checks. | |
| 4917 Node* | |
| 4918 LibraryCallKit::generate_generic_arraycopy(const TypePtr* adr_type, | |
| 4919 Node* src, Node* src_offset, | |
| 4920 Node* dest, Node* dest_offset, | |
| 4921 Node* copy_length, | |
| 4922 int nargs) { | |
| 4923 if (stopped()) return NULL; | |
| 4924 | |
| 4925 address copyfunc_addr = StubRoutines::generic_arraycopy(); | |
| 4926 if (copyfunc_addr == NULL) { // Stub was not generated, go slow path. | |
| 4927 return NULL; | |
| 4928 } | |
| 4929 | |
| 4930 Node* call = make_runtime_call(RC_LEAF|RC_NO_FP, | |
| 4931 OptoRuntime::generic_arraycopy_Type(), | |
| 4932 copyfunc_addr, "generic_arraycopy", adr_type, | |
| 4933 src, src_offset, dest, dest_offset, copy_length); | |
| 4934 | |
| 4935 return _gvn.transform(new (C, 1) ProjNode(call, TypeFunc::Parms)); | |
| 4936 } | |
| 4937 | |
| 4938 // Helper function; generates the fast out-of-line call to an arraycopy stub. | |
| 4939 void | |
| 4940 LibraryCallKit::generate_unchecked_arraycopy(const TypePtr* adr_type, | |
| 4941 BasicType basic_elem_type, | |
| 4942 bool disjoint_bases, | |
| 4943 Node* src, Node* src_offset, | |
| 4944 Node* dest, Node* dest_offset, | |
| 4945 Node* copy_length) { | |
| 4946 if (stopped()) return; // nothing to do | |
| 4947 | |
| 4948 Node* src_start = src; | |
| 4949 Node* dest_start = dest; | |
| 4950 if (src_offset != NULL || dest_offset != NULL) { | |
| 4951 assert(src_offset != NULL && dest_offset != NULL, ""); | |
| 4952 src_start = array_element_address(src, src_offset, basic_elem_type); | |
| 4953 dest_start = array_element_address(dest, dest_offset, basic_elem_type); | |
| 4954 } | |
| 4955 | |
| 4956 // Figure out which arraycopy runtime method to call. | |
| 4957 const char* copyfunc_name = "arraycopy"; | |
| 4958 address copyfunc_addr = | |
| 4959 basictype2arraycopy(basic_elem_type, src_offset, dest_offset, | |
| 4960 disjoint_bases, copyfunc_name); | |
| 4961 | |
| 4962 // Call it. Note that the count_ix value is not scaled to a byte-size. | |
| 4963 make_runtime_call(RC_LEAF|RC_NO_FP, | |
| 4964 OptoRuntime::fast_arraycopy_Type(), | |
| 4965 copyfunc_addr, copyfunc_name, adr_type, | |
| 4966 src_start, dest_start, copy_length XTOP); | |
| 4967 } |