Mercurial > hg > truffle
annotate src/share/vm/opto/callGenerator.cpp @ 14383:5ec7dace41a6
8027422: assert(_gvn.type(obj)->higher_equal(tjp)) failed: cast_up is no longer needed
Summary: type methods shouldn't always operate on speculative part
Reviewed-by: kvn, twisti
| author | roland |
|---|---|
| date | Fri, 24 Jan 2014 09:31:53 +0100 |
| parents | de6a9e811145 |
| children | 45467c53f178 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "ci/bcEscapeAnalyzer.hpp" | |
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27 #include "ci/ciCallSite.hpp" |
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28 #include "ci/ciObjArray.hpp" |
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29 #include "ci/ciMemberName.hpp" |
| 1972 | 30 #include "ci/ciMethodHandle.hpp" |
| 31 #include "classfile/javaClasses.hpp" | |
| 32 #include "compiler/compileLog.hpp" | |
| 33 #include "opto/addnode.hpp" | |
| 34 #include "opto/callGenerator.hpp" | |
| 35 #include "opto/callnode.hpp" | |
| 36 #include "opto/cfgnode.hpp" | |
| 37 #include "opto/connode.hpp" | |
| 38 #include "opto/parse.hpp" | |
| 39 #include "opto/rootnode.hpp" | |
| 40 #include "opto/runtime.hpp" | |
| 41 #include "opto/subnode.hpp" | |
| 0 | 42 |
| 43 | |
| 44 // Utility function. | |
| 45 const TypeFunc* CallGenerator::tf() const { | |
| 46 return TypeFunc::make(method()); | |
| 47 } | |
| 48 | |
| 49 //-----------------------------ParseGenerator--------------------------------- | |
| 50 // Internal class which handles all direct bytecode traversal. | |
| 51 class ParseGenerator : public InlineCallGenerator { | |
| 52 private: | |
| 53 bool _is_osr; | |
| 54 float _expected_uses; | |
| 55 | |
| 56 public: | |
| 57 ParseGenerator(ciMethod* method, float expected_uses, bool is_osr = false) | |
| 58 : InlineCallGenerator(method) | |
| 59 { | |
| 60 _is_osr = is_osr; | |
| 61 _expected_uses = expected_uses; | |
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62 assert(InlineTree::check_can_parse(method) == NULL, "parse must be possible"); |
| 0 | 63 } |
| 64 | |
| 65 virtual bool is_parse() const { return true; } | |
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66 virtual JVMState* generate(JVMState* jvms, Parse* parent_parser); |
| 0 | 67 int is_osr() { return _is_osr; } |
| 68 | |
| 69 }; | |
| 70 | |
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71 JVMState* ParseGenerator::generate(JVMState* jvms, Parse* parent_parser) { |
| 0 | 72 Compile* C = Compile::current(); |
| 73 | |
| 74 if (is_osr()) { | |
| 75 // The JVMS for a OSR has a single argument (see its TypeFunc). | |
| 76 assert(jvms->depth() == 1, "no inline OSR"); | |
| 77 } | |
| 78 | |
| 79 if (C->failing()) { | |
| 80 return NULL; // bailing out of the compile; do not try to parse | |
| 81 } | |
| 82 | |
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83 Parse parser(jvms, method(), _expected_uses, parent_parser); |
| 0 | 84 // Grab signature for matching/allocation |
| 85 #ifdef ASSERT | |
| 86 if (parser.tf() != (parser.depth() == 1 ? C->tf() : tf())) { | |
| 87 MutexLockerEx ml(Compile_lock, Mutex::_no_safepoint_check_flag); | |
| 88 assert(C->env()->system_dictionary_modification_counter_changed(), | |
| 89 "Must invalidate if TypeFuncs differ"); | |
| 90 } | |
| 91 #endif | |
| 92 | |
| 93 GraphKit& exits = parser.exits(); | |
| 94 | |
| 95 if (C->failing()) { | |
| 96 while (exits.pop_exception_state() != NULL) ; | |
| 97 return NULL; | |
| 98 } | |
| 99 | |
| 100 assert(exits.jvms()->same_calls_as(jvms), "sanity"); | |
| 101 | |
| 102 // Simply return the exit state of the parser, | |
| 103 // augmented by any exceptional states. | |
| 104 return exits.transfer_exceptions_into_jvms(); | |
| 105 } | |
| 106 | |
| 107 //---------------------------DirectCallGenerator------------------------------ | |
| 108 // Internal class which handles all out-of-line calls w/o receiver type checks. | |
| 109 class DirectCallGenerator : public CallGenerator { | |
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110 private: |
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111 CallStaticJavaNode* _call_node; |
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112 // Force separate memory and I/O projections for the exceptional |
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113 // paths to facilitate late inlinig. |
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114 bool _separate_io_proj; |
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115 |
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116 public: |
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117 DirectCallGenerator(ciMethod* method, bool separate_io_proj) |
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118 : CallGenerator(method), |
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119 _separate_io_proj(separate_io_proj) |
| 0 | 120 { |
| 121 } | |
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122 virtual JVMState* generate(JVMState* jvms, Parse* parent_parser); |
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123 |
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124 CallStaticJavaNode* call_node() const { return _call_node; } |
| 0 | 125 }; |
| 126 | |
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127 JVMState* DirectCallGenerator::generate(JVMState* jvms, Parse* parent_parser) { |
| 0 | 128 GraphKit kit(jvms); |
| 129 bool is_static = method()->is_static(); | |
| 130 address target = is_static ? SharedRuntime::get_resolve_static_call_stub() | |
| 131 : SharedRuntime::get_resolve_opt_virtual_call_stub(); | |
| 132 | |
| 133 if (kit.C->log() != NULL) { | |
| 134 kit.C->log()->elem("direct_call bci='%d'", jvms->bci()); | |
| 135 } | |
| 136 | |
| 10278 | 137 CallStaticJavaNode *call = new (kit.C) CallStaticJavaNode(kit.C, tf(), target, method(), kit.bci()); |
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138 _call_node = call; // Save the call node in case we need it later |
| 0 | 139 if (!is_static) { |
| 140 // Make an explicit receiver null_check as part of this call. | |
| 141 // Since we share a map with the caller, his JVMS gets adjusted. | |
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142 kit.null_check_receiver_before_call(method()); |
| 0 | 143 if (kit.stopped()) { |
| 144 // And dump it back to the caller, decorated with any exceptions: | |
| 145 return kit.transfer_exceptions_into_jvms(); | |
| 146 } | |
| 147 // Mark the call node as virtual, sort of: | |
| 148 call->set_optimized_virtual(true); | |
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149 if (method()->is_method_handle_intrinsic() || |
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150 method()->is_compiled_lambda_form()) { |
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151 call->set_method_handle_invoke(true); |
| 1265 | 152 } |
| 0 | 153 } |
| 154 kit.set_arguments_for_java_call(call); | |
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155 kit.set_edges_for_java_call(call, false, _separate_io_proj); |
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156 Node* ret = kit.set_results_for_java_call(call, _separate_io_proj); |
| 0 | 157 kit.push_node(method()->return_type()->basic_type(), ret); |
| 158 return kit.transfer_exceptions_into_jvms(); | |
| 159 } | |
| 160 | |
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161 //--------------------------VirtualCallGenerator------------------------------ |
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162 // Internal class which handles all out-of-line calls checking receiver type. |
| 0 | 163 class VirtualCallGenerator : public CallGenerator { |
| 164 private: | |
| 165 int _vtable_index; | |
| 166 public: | |
| 167 VirtualCallGenerator(ciMethod* method, int vtable_index) | |
| 168 : CallGenerator(method), _vtable_index(vtable_index) | |
| 169 { | |
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170 assert(vtable_index == Method::invalid_vtable_index || |
| 0 | 171 vtable_index >= 0, "either invalid or usable"); |
| 172 } | |
| 173 virtual bool is_virtual() const { return true; } | |
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174 virtual JVMState* generate(JVMState* jvms, Parse* parent_parser); |
| 0 | 175 }; |
| 176 | |
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177 JVMState* VirtualCallGenerator::generate(JVMState* jvms, Parse* parent_parser) { |
| 0 | 178 GraphKit kit(jvms); |
| 179 Node* receiver = kit.argument(0); | |
| 180 | |
| 181 if (kit.C->log() != NULL) { | |
| 182 kit.C->log()->elem("virtual_call bci='%d'", jvms->bci()); | |
| 183 } | |
| 184 | |
| 185 // If the receiver is a constant null, do not torture the system | |
| 186 // by attempting to call through it. The compile will proceed | |
| 187 // correctly, but may bail out in final_graph_reshaping, because | |
| 188 // the call instruction will have a seemingly deficient out-count. | |
| 189 // (The bailout says something misleading about an "infinite loop".) | |
| 190 if (kit.gvn().type(receiver)->higher_equal(TypePtr::NULL_PTR)) { | |
| 191 kit.inc_sp(method()->arg_size()); // restore arguments | |
| 192 kit.uncommon_trap(Deoptimization::Reason_null_check, | |
| 193 Deoptimization::Action_none, | |
| 194 NULL, "null receiver"); | |
| 195 return kit.transfer_exceptions_into_jvms(); | |
| 196 } | |
| 197 | |
| 198 // Ideally we would unconditionally do a null check here and let it | |
| 199 // be converted to an implicit check based on profile information. | |
| 200 // However currently the conversion to implicit null checks in | |
| 201 // Block::implicit_null_check() only looks for loads and stores, not calls. | |
| 202 ciMethod *caller = kit.method(); | |
| 203 ciMethodData *caller_md = (caller == NULL) ? NULL : caller->method_data(); | |
| 204 if (!UseInlineCaches || !ImplicitNullChecks || | |
| 205 ((ImplicitNullCheckThreshold > 0) && caller_md && | |
| 206 (caller_md->trap_count(Deoptimization::Reason_null_check) | |
| 207 >= (uint)ImplicitNullCheckThreshold))) { | |
| 208 // Make an explicit receiver null_check as part of this call. | |
| 209 // Since we share a map with the caller, his JVMS gets adjusted. | |
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210 receiver = kit.null_check_receiver_before_call(method()); |
| 0 | 211 if (kit.stopped()) { |
| 212 // And dump it back to the caller, decorated with any exceptions: | |
| 213 return kit.transfer_exceptions_into_jvms(); | |
| 214 } | |
| 215 } | |
| 216 | |
| 217 assert(!method()->is_static(), "virtual call must not be to static"); | |
| 218 assert(!method()->is_final(), "virtual call should not be to final"); | |
| 219 assert(!method()->is_private(), "virtual call should not be to private"); | |
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220 assert(_vtable_index == Method::invalid_vtable_index || !UseInlineCaches, |
| 0 | 221 "no vtable calls if +UseInlineCaches "); |
| 222 address target = SharedRuntime::get_resolve_virtual_call_stub(); | |
| 223 // Normal inline cache used for call | |
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224 CallDynamicJavaNode *call = new (kit.C) CallDynamicJavaNode(tf(), target, method(), _vtable_index, kit.bci()); |
| 0 | 225 kit.set_arguments_for_java_call(call); |
| 226 kit.set_edges_for_java_call(call); | |
| 227 Node* ret = kit.set_results_for_java_call(call); | |
| 228 kit.push_node(method()->return_type()->basic_type(), ret); | |
| 229 | |
| 230 // Represent the effect of an implicit receiver null_check | |
| 231 // as part of this call. Since we share a map with the caller, | |
| 232 // his JVMS gets adjusted. | |
| 233 kit.cast_not_null(receiver); | |
| 234 return kit.transfer_exceptions_into_jvms(); | |
| 235 } | |
| 236 | |
| 237 CallGenerator* CallGenerator::for_inline(ciMethod* m, float expected_uses) { | |
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238 if (InlineTree::check_can_parse(m) != NULL) return NULL; |
| 0 | 239 return new ParseGenerator(m, expected_uses); |
| 240 } | |
| 241 | |
| 242 // As a special case, the JVMS passed to this CallGenerator is | |
| 243 // for the method execution already in progress, not just the JVMS | |
| 244 // of the caller. Thus, this CallGenerator cannot be mixed with others! | |
| 245 CallGenerator* CallGenerator::for_osr(ciMethod* m, int osr_bci) { | |
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246 if (InlineTree::check_can_parse(m) != NULL) return NULL; |
| 0 | 247 float past_uses = m->interpreter_invocation_count(); |
| 248 float expected_uses = past_uses; | |
| 249 return new ParseGenerator(m, expected_uses, true); | |
| 250 } | |
| 251 | |
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252 CallGenerator* CallGenerator::for_direct_call(ciMethod* m, bool separate_io_proj) { |
| 0 | 253 assert(!m->is_abstract(), "for_direct_call mismatch"); |
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254 return new DirectCallGenerator(m, separate_io_proj); |
| 0 | 255 } |
| 256 | |
| 257 CallGenerator* CallGenerator::for_virtual_call(ciMethod* m, int vtable_index) { | |
| 258 assert(!m->is_static(), "for_virtual_call mismatch"); | |
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259 assert(!m->is_method_handle_intrinsic(), "should be a direct call"); |
| 0 | 260 return new VirtualCallGenerator(m, vtable_index); |
| 261 } | |
| 262 | |
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263 // Allow inlining decisions to be delayed |
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264 class LateInlineCallGenerator : public DirectCallGenerator { |
| 7473 | 265 protected: |
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266 CallGenerator* _inline_cg; |
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267 |
| 7473 | 268 virtual bool do_late_inline_check(JVMState* jvms) { return true; } |
| 269 | |
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270 public: |
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271 LateInlineCallGenerator(ciMethod* method, CallGenerator* inline_cg) : |
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272 DirectCallGenerator(method, true), _inline_cg(inline_cg) {} |
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273 |
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274 virtual bool is_late_inline() const { return true; } |
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275 |
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276 // Convert the CallStaticJava into an inline |
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277 virtual void do_late_inline(); |
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278 |
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279 virtual JVMState* generate(JVMState* jvms, Parse* parent_parser) { |
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280 Compile *C = Compile::current(); |
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281 C->print_inlining_skip(this); |
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282 |
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283 // Record that this call site should be revisited once the main |
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284 // parse is finished. |
| 7473 | 285 if (!is_mh_late_inline()) { |
| 286 C->add_late_inline(this); | |
| 287 } | |
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288 |
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289 // Emit the CallStaticJava and request separate projections so |
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290 // that the late inlining logic can distinguish between fall |
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291 // through and exceptional uses of the memory and io projections |
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292 // as is done for allocations and macro expansion. |
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293 return DirectCallGenerator::generate(jvms, parent_parser); |
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294 } |
| 7473 | 295 |
| 296 virtual void print_inlining_late(const char* msg) { | |
| 297 CallNode* call = call_node(); | |
| 298 Compile* C = Compile::current(); | |
| 299 C->print_inlining_insert(this); | |
| 300 C->print_inlining(method(), call->jvms()->depth()-1, call->jvms()->bci(), msg); | |
| 301 } | |
| 302 | |
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303 }; |
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304 |
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305 void LateInlineCallGenerator::do_late_inline() { |
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306 // Can't inline it |
| 10278 | 307 CallStaticJavaNode* call = call_node(); |
| 308 if (call == NULL || call->outcnt() == 0 || | |
| 309 call->in(0) == NULL || call->in(0)->is_top()) { | |
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310 return; |
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311 } |
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312 |
| 10278 | 313 const TypeTuple *r = call->tf()->domain(); |
| 7473 | 314 for (int i1 = 0; i1 < method()->arg_size(); i1++) { |
| 10278 | 315 if (call->in(TypeFunc::Parms + i1)->is_top() && r->field_at(TypeFunc::Parms + i1) != Type::HALF) { |
| 7473 | 316 assert(Compile::current()->inlining_incrementally(), "shouldn't happen during parsing"); |
| 317 return; | |
| 318 } | |
| 319 } | |
| 320 | |
| 10278 | 321 if (call->in(TypeFunc::Memory)->is_top()) { |
| 7473 | 322 assert(Compile::current()->inlining_incrementally(), "shouldn't happen during parsing"); |
| 323 return; | |
| 324 } | |
| 325 | |
| 10278 | 326 Compile* C = Compile::current(); |
| 327 // Remove inlined methods from Compiler's lists. | |
| 328 if (call->is_macro()) { | |
| 329 C->remove_macro_node(call); | |
| 330 } | |
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331 |
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332 // Make a clone of the JVMState that appropriate to use for driving a parse |
| 10278 | 333 JVMState* old_jvms = call->jvms(); |
| 334 JVMState* jvms = old_jvms->clone_shallow(C); | |
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335 uint size = call->req(); |
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336 SafePointNode* map = new (C) SafePointNode(size, jvms); |
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337 for (uint i1 = 0; i1 < size; i1++) { |
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338 map->init_req(i1, call->in(i1)); |
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339 } |
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340 |
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341 // Make sure the state is a MergeMem for parsing. |
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342 if (!map->in(TypeFunc::Memory)->is_MergeMem()) { |
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343 Node* mem = MergeMemNode::make(C, map->in(TypeFunc::Memory)); |
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344 C->initial_gvn()->set_type_bottom(mem); |
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345 map->set_req(TypeFunc::Memory, mem); |
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346 } |
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347 |
| 10278 | 348 uint nargs = method()->arg_size(); |
| 349 // blow away old call arguments | |
| 350 Node* top = C->top(); | |
| 351 for (uint i1 = 0; i1 < nargs; i1++) { | |
| 352 map->set_req(TypeFunc::Parms + i1, top); | |
| 353 } | |
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354 jvms->set_map(map); |
| 10278 | 355 |
| 356 // Make enough space in the expression stack to transfer | |
| 357 // the incoming arguments and return value. | |
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358 map->ensure_stack(jvms, jvms->method()->max_stack()); |
| 10278 | 359 for (uint i1 = 0; i1 < nargs; i1++) { |
| 360 map->set_argument(jvms, i1, call->in(TypeFunc::Parms + i1)); | |
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361 } |
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362 |
| 10278 | 363 // This check is done here because for_method_handle_inline() method |
| 364 // needs jvms for inlined state. | |
| 7473 | 365 if (!do_late_inline_check(jvms)) { |
| 366 map->disconnect_inputs(NULL, C); | |
| 367 return; | |
| 368 } | |
| 369 | |
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370 C->print_inlining_insert(this); |
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371 |
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372 CompileLog* log = C->log(); |
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373 if (log != NULL) { |
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374 log->head("late_inline method='%d'", log->identify(method())); |
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375 JVMState* p = jvms; |
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376 while (p != NULL) { |
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377 log->elem("jvms bci='%d' method='%d'", p->bci(), log->identify(p->method())); |
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378 p = p->caller(); |
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379 } |
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380 log->tail("late_inline"); |
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381 } |
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382 |
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383 // Setup default node notes to be picked up by the inlining |
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384 Node_Notes* old_nn = C->default_node_notes(); |
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385 if (old_nn != NULL) { |
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386 Node_Notes* entry_nn = old_nn->clone(C); |
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387 entry_nn->set_jvms(jvms); |
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388 C->set_default_node_notes(entry_nn); |
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389 } |
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390 |
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391 // Now perform the inling using the synthesized JVMState |
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392 JVMState* new_jvms = _inline_cg->generate(jvms, NULL); |
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393 if (new_jvms == NULL) return; // no change |
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394 if (C->failing()) return; |
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395 |
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396 // Capture any exceptional control flow |
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397 GraphKit kit(new_jvms); |
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398 |
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399 // Find the result object |
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400 Node* result = C->top(); |
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401 int result_size = method()->return_type()->size(); |
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402 if (result_size != 0 && !kit.stopped()) { |
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403 result = (result_size == 1) ? kit.pop() : kit.pop_pair(); |
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404 } |
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405 |
| 7473 | 406 C->set_has_loops(C->has_loops() || _inline_cg->method()->has_loops()); |
| 407 C->env()->notice_inlined_method(_inline_cg->method()); | |
| 408 C->set_inlining_progress(true); | |
| 409 | |
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410 kit.replace_call(call, result); |
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411 } |
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412 |
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413 |
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414 CallGenerator* CallGenerator::for_late_inline(ciMethod* method, CallGenerator* inline_cg) { |
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415 return new LateInlineCallGenerator(method, inline_cg); |
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416 } |
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417 |
| 7473 | 418 class LateInlineMHCallGenerator : public LateInlineCallGenerator { |
| 419 ciMethod* _caller; | |
| 420 int _attempt; | |
| 421 bool _input_not_const; | |
| 422 | |
| 423 virtual bool do_late_inline_check(JVMState* jvms); | |
| 424 virtual bool already_attempted() const { return _attempt > 0; } | |
| 425 | |
| 426 public: | |
| 427 LateInlineMHCallGenerator(ciMethod* caller, ciMethod* callee, bool input_not_const) : | |
| 428 LateInlineCallGenerator(callee, NULL), _caller(caller), _attempt(0), _input_not_const(input_not_const) {} | |
| 429 | |
| 430 virtual bool is_mh_late_inline() const { return true; } | |
| 431 | |
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432 virtual JVMState* generate(JVMState* jvms, Parse* parent_parser) { |
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433 JVMState* new_jvms = LateInlineCallGenerator::generate(jvms, parent_parser); |
| 7473 | 434 if (_input_not_const) { |
| 435 // inlining won't be possible so no need to enqueue right now. | |
| 436 call_node()->set_generator(this); | |
| 437 } else { | |
| 438 Compile::current()->add_late_inline(this); | |
| 439 } | |
| 440 return new_jvms; | |
| 441 } | |
| 442 | |
| 443 virtual void print_inlining_late(const char* msg) { | |
| 444 if (!_input_not_const) return; | |
| 445 LateInlineCallGenerator::print_inlining_late(msg); | |
| 446 } | |
| 447 }; | |
| 448 | |
| 449 bool LateInlineMHCallGenerator::do_late_inline_check(JVMState* jvms) { | |
| 450 | |
| 451 CallGenerator* cg = for_method_handle_inline(jvms, _caller, method(), _input_not_const); | |
| 452 | |
| 453 if (!_input_not_const) { | |
| 454 _attempt++; | |
| 455 } | |
| 456 | |
| 457 if (cg != NULL) { | |
| 458 assert(!cg->is_late_inline() && cg->is_inline(), "we're doing late inlining"); | |
| 459 _inline_cg = cg; | |
| 460 Compile::current()->dec_number_of_mh_late_inlines(); | |
| 461 return true; | |
| 462 } | |
| 463 | |
| 464 call_node()->set_generator(this); | |
| 465 return false; | |
| 466 } | |
| 467 | |
| 468 CallGenerator* CallGenerator::for_mh_late_inline(ciMethod* caller, ciMethod* callee, bool input_not_const) { | |
| 469 Compile::current()->inc_number_of_mh_late_inlines(); | |
| 470 CallGenerator* cg = new LateInlineMHCallGenerator(caller, callee, input_not_const); | |
| 471 return cg; | |
| 472 } | |
| 473 | |
| 474 class LateInlineStringCallGenerator : public LateInlineCallGenerator { | |
| 475 | |
| 476 public: | |
| 477 LateInlineStringCallGenerator(ciMethod* method, CallGenerator* inline_cg) : | |
| 478 LateInlineCallGenerator(method, inline_cg) {} | |
| 479 | |
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480 virtual JVMState* generate(JVMState* jvms, Parse* parent_parser) { |
| 7473 | 481 Compile *C = Compile::current(); |
| 482 C->print_inlining_skip(this); | |
| 483 | |
| 484 C->add_string_late_inline(this); | |
| 485 | |
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486 JVMState* new_jvms = DirectCallGenerator::generate(jvms, parent_parser); |
| 7473 | 487 return new_jvms; |
| 488 } | |
| 12966 | 489 |
| 490 virtual bool is_string_late_inline() const { return true; } | |
| 7473 | 491 }; |
| 492 | |
| 493 CallGenerator* CallGenerator::for_string_late_inline(ciMethod* method, CallGenerator* inline_cg) { | |
| 494 return new LateInlineStringCallGenerator(method, inline_cg); | |
| 495 } | |
| 496 | |
| 10278 | 497 class LateInlineBoxingCallGenerator : public LateInlineCallGenerator { |
| 498 | |
| 499 public: | |
| 500 LateInlineBoxingCallGenerator(ciMethod* method, CallGenerator* inline_cg) : | |
| 501 LateInlineCallGenerator(method, inline_cg) {} | |
| 502 | |
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503 virtual JVMState* generate(JVMState* jvms, Parse* parent_parser) { |
| 10278 | 504 Compile *C = Compile::current(); |
| 505 C->print_inlining_skip(this); | |
| 506 | |
| 507 C->add_boxing_late_inline(this); | |
| 508 | |
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509 JVMState* new_jvms = DirectCallGenerator::generate(jvms, parent_parser); |
| 10278 | 510 return new_jvms; |
| 511 } | |
| 512 }; | |
| 513 | |
| 514 CallGenerator* CallGenerator::for_boxing_late_inline(ciMethod* method, CallGenerator* inline_cg) { | |
| 515 return new LateInlineBoxingCallGenerator(method, inline_cg); | |
| 516 } | |
| 0 | 517 |
| 518 //---------------------------WarmCallGenerator-------------------------------- | |
| 519 // Internal class which handles initial deferral of inlining decisions. | |
| 520 class WarmCallGenerator : public CallGenerator { | |
| 521 WarmCallInfo* _call_info; | |
| 522 CallGenerator* _if_cold; | |
| 523 CallGenerator* _if_hot; | |
| 524 bool _is_virtual; // caches virtuality of if_cold | |
| 525 bool _is_inline; // caches inline-ness of if_hot | |
| 526 | |
| 527 public: | |
| 528 WarmCallGenerator(WarmCallInfo* ci, | |
| 529 CallGenerator* if_cold, | |
| 530 CallGenerator* if_hot) | |
| 531 : CallGenerator(if_cold->method()) | |
| 532 { | |
| 533 assert(method() == if_hot->method(), "consistent choices"); | |
| 534 _call_info = ci; | |
| 535 _if_cold = if_cold; | |
| 536 _if_hot = if_hot; | |
| 537 _is_virtual = if_cold->is_virtual(); | |
| 538 _is_inline = if_hot->is_inline(); | |
| 539 } | |
| 540 | |
| 541 virtual bool is_inline() const { return _is_inline; } | |
| 542 virtual bool is_virtual() const { return _is_virtual; } | |
| 543 virtual bool is_deferred() const { return true; } | |
| 544 | |
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545 virtual JVMState* generate(JVMState* jvms, Parse* parent_parser); |
| 0 | 546 }; |
| 547 | |
| 548 | |
| 549 CallGenerator* CallGenerator::for_warm_call(WarmCallInfo* ci, | |
| 550 CallGenerator* if_cold, | |
| 551 CallGenerator* if_hot) { | |
| 552 return new WarmCallGenerator(ci, if_cold, if_hot); | |
| 553 } | |
| 554 | |
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555 JVMState* WarmCallGenerator::generate(JVMState* jvms, Parse* parent_parser) { |
| 0 | 556 Compile* C = Compile::current(); |
| 557 if (C->log() != NULL) { | |
| 558 C->log()->elem("warm_call bci='%d'", jvms->bci()); | |
| 559 } | |
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560 jvms = _if_cold->generate(jvms, parent_parser); |
| 0 | 561 if (jvms != NULL) { |
| 562 Node* m = jvms->map()->control(); | |
| 563 if (m->is_CatchProj()) m = m->in(0); else m = C->top(); | |
| 564 if (m->is_Catch()) m = m->in(0); else m = C->top(); | |
| 565 if (m->is_Proj()) m = m->in(0); else m = C->top(); | |
| 566 if (m->is_CallJava()) { | |
| 567 _call_info->set_call(m->as_Call()); | |
| 568 _call_info->set_hot_cg(_if_hot); | |
| 569 #ifndef PRODUCT | |
| 570 if (PrintOpto || PrintOptoInlining) { | |
| 571 tty->print_cr("Queueing for warm inlining at bci %d:", jvms->bci()); | |
| 572 tty->print("WCI: "); | |
| 573 _call_info->print(); | |
| 574 } | |
| 575 #endif | |
| 576 _call_info->set_heat(_call_info->compute_heat()); | |
| 577 C->set_warm_calls(_call_info->insert_into(C->warm_calls())); | |
| 578 } | |
| 579 } | |
| 580 return jvms; | |
| 581 } | |
| 582 | |
| 583 void WarmCallInfo::make_hot() { | |
|
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584 Unimplemented(); |
| 0 | 585 } |
| 586 | |
| 587 void WarmCallInfo::make_cold() { | |
| 588 // No action: Just dequeue. | |
| 589 } | |
| 590 | |
| 591 | |
| 592 //------------------------PredictedCallGenerator------------------------------ | |
| 593 // Internal class which handles all out-of-line calls checking receiver type. | |
| 594 class PredictedCallGenerator : public CallGenerator { | |
| 595 ciKlass* _predicted_receiver; | |
| 596 CallGenerator* _if_missed; | |
| 597 CallGenerator* _if_hit; | |
| 598 float _hit_prob; | |
| 599 | |
| 600 public: | |
| 601 PredictedCallGenerator(ciKlass* predicted_receiver, | |
| 602 CallGenerator* if_missed, | |
| 603 CallGenerator* if_hit, float hit_prob) | |
| 604 : CallGenerator(if_missed->method()) | |
| 605 { | |
| 606 // The call profile data may predict the hit_prob as extreme as 0 or 1. | |
| 607 // Remove the extremes values from the range. | |
| 608 if (hit_prob > PROB_MAX) hit_prob = PROB_MAX; | |
| 609 if (hit_prob < PROB_MIN) hit_prob = PROB_MIN; | |
| 610 | |
| 611 _predicted_receiver = predicted_receiver; | |
| 612 _if_missed = if_missed; | |
| 613 _if_hit = if_hit; | |
| 614 _hit_prob = hit_prob; | |
| 615 } | |
| 616 | |
| 617 virtual bool is_virtual() const { return true; } | |
| 618 virtual bool is_inline() const { return _if_hit->is_inline(); } | |
| 619 virtual bool is_deferred() const { return _if_hit->is_deferred(); } | |
| 620 | |
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621 virtual JVMState* generate(JVMState* jvms, Parse* parent_parser); |
| 0 | 622 }; |
| 623 | |
| 624 | |
| 625 CallGenerator* CallGenerator::for_predicted_call(ciKlass* predicted_receiver, | |
| 626 CallGenerator* if_missed, | |
| 627 CallGenerator* if_hit, | |
| 628 float hit_prob) { | |
| 629 return new PredictedCallGenerator(predicted_receiver, if_missed, if_hit, hit_prob); | |
| 630 } | |
| 631 | |
| 632 | |
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633 JVMState* PredictedCallGenerator::generate(JVMState* jvms, Parse* parent_parser) { |
| 0 | 634 GraphKit kit(jvms); |
| 635 PhaseGVN& gvn = kit.gvn(); | |
| 636 // We need an explicit receiver null_check before checking its type. | |
| 637 // We share a map with the caller, so his JVMS gets adjusted. | |
| 638 Node* receiver = kit.argument(0); | |
| 639 | |
| 640 CompileLog* log = kit.C->log(); | |
| 641 if (log != NULL) { | |
| 642 log->elem("predicted_call bci='%d' klass='%d'", | |
| 643 jvms->bci(), log->identify(_predicted_receiver)); | |
| 644 } | |
| 645 | |
|
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646 receiver = kit.null_check_receiver_before_call(method()); |
| 0 | 647 if (kit.stopped()) { |
| 648 return kit.transfer_exceptions_into_jvms(); | |
| 649 } | |
| 650 | |
| 651 Node* exact_receiver = receiver; // will get updated in place... | |
| 652 Node* slow_ctl = kit.type_check_receiver(receiver, | |
| 653 _predicted_receiver, _hit_prob, | |
| 654 &exact_receiver); | |
| 655 | |
| 656 SafePointNode* slow_map = NULL; | |
| 657 JVMState* slow_jvms; | |
| 658 { PreserveJVMState pjvms(&kit); | |
| 659 kit.set_control(slow_ctl); | |
| 660 if (!kit.stopped()) { | |
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661 slow_jvms = _if_missed->generate(kit.sync_jvms(), parent_parser); |
|
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662 if (kit.failing()) |
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663 return NULL; // might happen because of NodeCountInliningCutoff |
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664 assert(slow_jvms != NULL, "must be"); |
| 0 | 665 kit.add_exception_states_from(slow_jvms); |
| 666 kit.set_map(slow_jvms->map()); | |
| 667 if (!kit.stopped()) | |
| 668 slow_map = kit.stop(); | |
| 669 } | |
| 670 } | |
| 671 | |
|
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672 if (kit.stopped()) { |
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673 // Instance exactly does not matches the desired type. |
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674 kit.set_jvms(slow_jvms); |
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675 return kit.transfer_exceptions_into_jvms(); |
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676 } |
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677 |
| 0 | 678 // fall through if the instance exactly matches the desired type |
| 679 kit.replace_in_map(receiver, exact_receiver); | |
| 680 | |
| 681 // Make the hot call: | |
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682 JVMState* new_jvms = _if_hit->generate(kit.sync_jvms(), parent_parser); |
| 0 | 683 if (new_jvms == NULL) { |
| 684 // Inline failed, so make a direct call. | |
| 685 assert(_if_hit->is_inline(), "must have been a failed inline"); | |
| 686 CallGenerator* cg = CallGenerator::for_direct_call(_if_hit->method()); | |
|
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687 new_jvms = cg->generate(kit.sync_jvms(), parent_parser); |
| 0 | 688 } |
| 689 kit.add_exception_states_from(new_jvms); | |
| 690 kit.set_jvms(new_jvms); | |
| 691 | |
| 692 // Need to merge slow and fast? | |
| 693 if (slow_map == NULL) { | |
| 694 // The fast path is the only path remaining. | |
| 695 return kit.transfer_exceptions_into_jvms(); | |
| 696 } | |
| 697 | |
| 698 if (kit.stopped()) { | |
| 699 // Inlined method threw an exception, so it's just the slow path after all. | |
| 700 kit.set_jvms(slow_jvms); | |
| 701 return kit.transfer_exceptions_into_jvms(); | |
| 702 } | |
| 703 | |
| 704 // Finish the diamond. | |
| 705 kit.C->set_has_split_ifs(true); // Has chance for split-if optimization | |
|
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706 RegionNode* region = new (kit.C) RegionNode(3); |
| 0 | 707 region->init_req(1, kit.control()); |
| 708 region->init_req(2, slow_map->control()); | |
| 709 kit.set_control(gvn.transform(region)); | |
| 710 Node* iophi = PhiNode::make(region, kit.i_o(), Type::ABIO); | |
| 711 iophi->set_req(2, slow_map->i_o()); | |
| 712 kit.set_i_o(gvn.transform(iophi)); | |
| 713 kit.merge_memory(slow_map->merged_memory(), region, 2); | |
| 714 uint tos = kit.jvms()->stkoff() + kit.sp(); | |
| 715 uint limit = slow_map->req(); | |
| 716 for (uint i = TypeFunc::Parms; i < limit; i++) { | |
| 717 // Skip unused stack slots; fast forward to monoff(); | |
| 718 if (i == tos) { | |
| 719 i = kit.jvms()->monoff(); | |
| 720 if( i >= limit ) break; | |
| 721 } | |
| 722 Node* m = kit.map()->in(i); | |
| 723 Node* n = slow_map->in(i); | |
| 724 if (m != n) { | |
|
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725 const Type* t = gvn.type(m)->meet_speculative(gvn.type(n)); |
| 0 | 726 Node* phi = PhiNode::make(region, m, t); |
| 727 phi->set_req(2, n); | |
| 728 kit.map()->set_req(i, gvn.transform(phi)); | |
| 729 } | |
| 730 } | |
| 731 return kit.transfer_exceptions_into_jvms(); | |
| 732 } | |
| 733 | |
| 734 | |
| 7473 | 735 CallGenerator* CallGenerator::for_method_handle_call(JVMState* jvms, ciMethod* caller, ciMethod* callee, bool delayed_forbidden) { |
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736 assert(callee->is_method_handle_intrinsic() || |
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737 callee->is_compiled_lambda_form(), "for_method_handle_call mismatch"); |
| 7473 | 738 bool input_not_const; |
| 739 CallGenerator* cg = CallGenerator::for_method_handle_inline(jvms, caller, callee, input_not_const); | |
| 740 Compile* C = Compile::current(); | |
| 741 if (cg != NULL) { | |
| 742 if (!delayed_forbidden && AlwaysIncrementalInline) { | |
| 743 return CallGenerator::for_late_inline(callee, cg); | |
| 744 } else { | |
| 745 return cg; | |
| 746 } | |
| 747 } | |
| 748 int bci = jvms->bci(); | |
| 749 ciCallProfile profile = caller->call_profile_at_bci(bci); | |
| 750 int call_site_count = caller->scale_count(profile.count()); | |
| 751 | |
| 752 if (IncrementalInline && call_site_count > 0 && | |
| 753 (input_not_const || !C->inlining_incrementally() || C->over_inlining_cutoff())) { | |
| 754 return CallGenerator::for_mh_late_inline(caller, callee, input_not_const); | |
| 755 } else { | |
| 7478 | 756 // Out-of-line call. |
| 7473 | 757 return CallGenerator::for_direct_call(callee); |
| 758 } | |
|
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759 } |
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760 |
| 7473 | 761 CallGenerator* CallGenerator::for_method_handle_inline(JVMState* jvms, ciMethod* caller, ciMethod* callee, bool& input_not_const) { |
|
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762 GraphKit kit(jvms); |
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763 PhaseGVN& gvn = kit.gvn(); |
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764 Compile* C = kit.C; |
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765 vmIntrinsics::ID iid = callee->intrinsic_id(); |
| 7473 | 766 input_not_const = true; |
|
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767 switch (iid) { |
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768 case vmIntrinsics::_invokeBasic: |
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769 { |
|
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770 // Get MethodHandle receiver: |
|
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771 Node* receiver = kit.argument(0); |
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772 if (receiver->Opcode() == Op_ConP) { |
| 7473 | 773 input_not_const = false; |
|
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774 const TypeOopPtr* oop_ptr = receiver->bottom_type()->is_oopptr(); |
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775 ciMethod* target = oop_ptr->const_oop()->as_method_handle()->get_vmtarget(); |
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776 guarantee(!target->is_method_handle_intrinsic(), "should not happen"); // XXX remove |
|
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777 const int vtable_index = Method::invalid_vtable_index; |
| 12966 | 778 CallGenerator* cg = C->call_generator(target, vtable_index, false, jvms, true, PROB_ALWAYS, NULL, true, true); |
|
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779 assert(cg == NULL || !cg->is_late_inline() || cg->is_mh_late_inline(), "no late inline here"); |
|
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780 if (cg != NULL && cg->is_inline()) |
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781 return cg; |
|
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782 } |
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783 } |
|
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784 break; |
|
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785 |
|
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786 case vmIntrinsics::_linkToVirtual: |
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787 case vmIntrinsics::_linkToStatic: |
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788 case vmIntrinsics::_linkToSpecial: |
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789 case vmIntrinsics::_linkToInterface: |
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790 { |
|
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791 // Get MemberName argument: |
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792 Node* member_name = kit.argument(callee->arg_size() - 1); |
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793 if (member_name->Opcode() == Op_ConP) { |
| 7473 | 794 input_not_const = false; |
|
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795 const TypeOopPtr* oop_ptr = member_name->bottom_type()->is_oopptr(); |
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796 ciMethod* target = oop_ptr->const_oop()->as_member_name()->get_vmtarget(); |
|
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797 |
|
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798 // In lamda forms we erase signature types to avoid resolving issues |
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799 // involving class loaders. When we optimize a method handle invoke |
|
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800 // to a direct call we must cast the receiver and arguments to its |
|
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801 // actual types. |
|
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802 ciSignature* signature = target->signature(); |
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803 const int receiver_skip = target->is_static() ? 0 : 1; |
|
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804 // Cast receiver to its type. |
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805 if (!target->is_static()) { |
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806 Node* arg = kit.argument(0); |
|
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807 const TypeOopPtr* arg_type = arg->bottom_type()->isa_oopptr(); |
|
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808 const Type* sig_type = TypeOopPtr::make_from_klass(signature->accessing_klass()); |
|
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809 if (arg_type != NULL && !arg_type->higher_equal(sig_type)) { |
|
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810 Node* cast_obj = gvn.transform(new (C) CheckCastPPNode(kit.control(), arg, sig_type)); |
|
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811 kit.set_argument(0, cast_obj); |
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812 } |
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813 } |
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814 // Cast reference arguments to its type. |
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815 for (int i = 0; i < signature->count(); i++) { |
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816 ciType* t = signature->type_at(i); |
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817 if (t->is_klass()) { |
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818 Node* arg = kit.argument(receiver_skip + i); |
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819 const TypeOopPtr* arg_type = arg->bottom_type()->isa_oopptr(); |
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820 const Type* sig_type = TypeOopPtr::make_from_klass(t->as_klass()); |
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821 if (arg_type != NULL && !arg_type->higher_equal(sig_type)) { |
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822 Node* cast_obj = gvn.transform(new (C) CheckCastPPNode(kit.control(), arg, sig_type)); |
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823 kit.set_argument(receiver_skip + i, cast_obj); |
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824 } |
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825 } |
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826 } |
| 7478 | 827 |
| 828 // Try to get the most accurate receiver type | |
| 829 const bool is_virtual = (iid == vmIntrinsics::_linkToVirtual); | |
| 830 const bool is_virtual_or_interface = (is_virtual || iid == vmIntrinsics::_linkToInterface); | |
| 831 int vtable_index = Method::invalid_vtable_index; | |
| 832 bool call_does_dispatch = false; | |
| 833 | |
| 12966 | 834 ciKlass* speculative_receiver_type = NULL; |
| 7478 | 835 if (is_virtual_or_interface) { |
| 836 ciInstanceKlass* klass = target->holder(); | |
| 837 Node* receiver_node = kit.argument(0); | |
| 838 const TypeOopPtr* receiver_type = gvn.type(receiver_node)->isa_oopptr(); | |
| 839 // call_does_dispatch and vtable_index are out-parameters. They might be changed. | |
| 840 target = C->optimize_virtual_call(caller, jvms->bci(), klass, target, receiver_type, | |
| 841 is_virtual, | |
| 842 call_does_dispatch, vtable_index); // out-parameters | |
| 12966 | 843 // We lack profiling at this call but type speculation may |
| 844 // provide us with a type | |
| 845 speculative_receiver_type = receiver_type->speculative_type(); | |
| 7478 | 846 } |
| 847 | |
| 12966 | 848 CallGenerator* cg = C->call_generator(target, vtable_index, call_does_dispatch, jvms, true, PROB_ALWAYS, speculative_receiver_type, true, true); |
|
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849 assert(cg == NULL || !cg->is_late_inline() || cg->is_mh_late_inline(), "no late inline here"); |
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850 if (cg != NULL && cg->is_inline()) |
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851 return cg; |
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852 } |
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853 } |
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854 break; |
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855 |
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856 default: |
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857 fatal(err_msg_res("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid))); |
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858 break; |
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859 } |
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860 return NULL; |
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861 } |
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862 |
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863 |
| 6894 | 864 //------------------------PredictedIntrinsicGenerator------------------------------ |
| 865 // Internal class which handles all predicted Intrinsic calls. | |
| 866 class PredictedIntrinsicGenerator : public CallGenerator { | |
| 867 CallGenerator* _intrinsic; | |
| 868 CallGenerator* _cg; | |
| 869 | |
| 870 public: | |
| 871 PredictedIntrinsicGenerator(CallGenerator* intrinsic, | |
| 872 CallGenerator* cg) | |
| 873 : CallGenerator(cg->method()) | |
| 874 { | |
| 875 _intrinsic = intrinsic; | |
| 876 _cg = cg; | |
| 877 } | |
| 878 | |
| 879 virtual bool is_virtual() const { return true; } | |
| 880 virtual bool is_inlined() const { return true; } | |
| 881 virtual bool is_intrinsic() const { return true; } | |
| 882 | |
|
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883 virtual JVMState* generate(JVMState* jvms, Parse* parent_parser); |
| 6894 | 884 }; |
| 885 | |
| 886 | |
| 887 CallGenerator* CallGenerator::for_predicted_intrinsic(CallGenerator* intrinsic, | |
| 888 CallGenerator* cg) { | |
| 889 return new PredictedIntrinsicGenerator(intrinsic, cg); | |
| 890 } | |
| 891 | |
| 892 | |
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893 JVMState* PredictedIntrinsicGenerator::generate(JVMState* jvms, Parse* parent_parser) { |
| 6894 | 894 GraphKit kit(jvms); |
| 895 PhaseGVN& gvn = kit.gvn(); | |
| 896 | |
| 897 CompileLog* log = kit.C->log(); | |
| 898 if (log != NULL) { | |
| 899 log->elem("predicted_intrinsic bci='%d' method='%d'", | |
| 900 jvms->bci(), log->identify(method())); | |
| 901 } | |
| 902 | |
| 903 Node* slow_ctl = _intrinsic->generate_predicate(kit.sync_jvms()); | |
| 904 if (kit.failing()) | |
| 905 return NULL; // might happen because of NodeCountInliningCutoff | |
| 906 | |
| 907 SafePointNode* slow_map = NULL; | |
| 908 JVMState* slow_jvms; | |
| 909 if (slow_ctl != NULL) { | |
| 910 PreserveJVMState pjvms(&kit); | |
| 911 kit.set_control(slow_ctl); | |
| 912 if (!kit.stopped()) { | |
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913 slow_jvms = _cg->generate(kit.sync_jvms(), parent_parser); |
| 6894 | 914 if (kit.failing()) |
| 915 return NULL; // might happen because of NodeCountInliningCutoff | |
| 916 assert(slow_jvms != NULL, "must be"); | |
| 917 kit.add_exception_states_from(slow_jvms); | |
| 918 kit.set_map(slow_jvms->map()); | |
| 919 if (!kit.stopped()) | |
| 920 slow_map = kit.stop(); | |
| 921 } | |
| 922 } | |
| 923 | |
| 924 if (kit.stopped()) { | |
| 925 // Predicate is always false. | |
| 926 kit.set_jvms(slow_jvms); | |
| 927 return kit.transfer_exceptions_into_jvms(); | |
| 928 } | |
| 929 | |
| 930 // Generate intrinsic code: | |
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931 JVMState* new_jvms = _intrinsic->generate(kit.sync_jvms(), parent_parser); |
| 6894 | 932 if (new_jvms == NULL) { |
| 933 // Intrinsic failed, so use slow code or make a direct call. | |
| 934 if (slow_map == NULL) { | |
| 935 CallGenerator* cg = CallGenerator::for_direct_call(method()); | |
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936 new_jvms = cg->generate(kit.sync_jvms(), parent_parser); |
| 6894 | 937 } else { |
| 938 kit.set_jvms(slow_jvms); | |
| 939 return kit.transfer_exceptions_into_jvms(); | |
| 940 } | |
| 941 } | |
| 942 kit.add_exception_states_from(new_jvms); | |
| 943 kit.set_jvms(new_jvms); | |
| 944 | |
| 945 // Need to merge slow and fast? | |
| 946 if (slow_map == NULL) { | |
| 947 // The fast path is the only path remaining. | |
| 948 return kit.transfer_exceptions_into_jvms(); | |
| 949 } | |
| 950 | |
| 951 if (kit.stopped()) { | |
| 952 // Intrinsic method threw an exception, so it's just the slow path after all. | |
| 953 kit.set_jvms(slow_jvms); | |
| 954 return kit.transfer_exceptions_into_jvms(); | |
| 955 } | |
| 956 | |
| 957 // Finish the diamond. | |
| 958 kit.C->set_has_split_ifs(true); // Has chance for split-if optimization | |
| 959 RegionNode* region = new (kit.C) RegionNode(3); | |
| 960 region->init_req(1, kit.control()); | |
| 961 region->init_req(2, slow_map->control()); | |
| 962 kit.set_control(gvn.transform(region)); | |
| 963 Node* iophi = PhiNode::make(region, kit.i_o(), Type::ABIO); | |
| 964 iophi->set_req(2, slow_map->i_o()); | |
| 965 kit.set_i_o(gvn.transform(iophi)); | |
| 966 kit.merge_memory(slow_map->merged_memory(), region, 2); | |
| 967 uint tos = kit.jvms()->stkoff() + kit.sp(); | |
| 968 uint limit = slow_map->req(); | |
| 969 for (uint i = TypeFunc::Parms; i < limit; i++) { | |
| 970 // Skip unused stack slots; fast forward to monoff(); | |
| 971 if (i == tos) { | |
| 972 i = kit.jvms()->monoff(); | |
| 973 if( i >= limit ) break; | |
| 974 } | |
| 975 Node* m = kit.map()->in(i); | |
| 976 Node* n = slow_map->in(i); | |
| 977 if (m != n) { | |
|
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978 const Type* t = gvn.type(m)->meet_speculative(gvn.type(n)); |
| 6894 | 979 Node* phi = PhiNode::make(region, m, t); |
| 980 phi->set_req(2, n); | |
| 981 kit.map()->set_req(i, gvn.transform(phi)); | |
| 982 } | |
| 983 } | |
| 984 return kit.transfer_exceptions_into_jvms(); | |
| 985 } | |
| 986 | |
| 0 | 987 //-------------------------UncommonTrapCallGenerator----------------------------- |
| 988 // Internal class which handles all out-of-line calls checking receiver type. | |
| 989 class UncommonTrapCallGenerator : public CallGenerator { | |
| 990 Deoptimization::DeoptReason _reason; | |
| 991 Deoptimization::DeoptAction _action; | |
| 992 | |
| 993 public: | |
| 994 UncommonTrapCallGenerator(ciMethod* m, | |
| 995 Deoptimization::DeoptReason reason, | |
| 996 Deoptimization::DeoptAction action) | |
| 997 : CallGenerator(m) | |
| 998 { | |
| 999 _reason = reason; | |
| 1000 _action = action; | |
| 1001 } | |
| 1002 | |
| 1003 virtual bool is_virtual() const { ShouldNotReachHere(); return false; } | |
| 1004 virtual bool is_trap() const { return true; } | |
| 1005 | |
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1006 virtual JVMState* generate(JVMState* jvms, Parse* parent_parser); |
| 0 | 1007 }; |
| 1008 | |
| 1009 | |
| 1010 CallGenerator* | |
| 1011 CallGenerator::for_uncommon_trap(ciMethod* m, | |
| 1012 Deoptimization::DeoptReason reason, | |
| 1013 Deoptimization::DeoptAction action) { | |
| 1014 return new UncommonTrapCallGenerator(m, reason, action); | |
| 1015 } | |
| 1016 | |
| 1017 | |
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1018 JVMState* UncommonTrapCallGenerator::generate(JVMState* jvms, Parse* parent_parser) { |
| 0 | 1019 GraphKit kit(jvms); |
| 1020 // Take the trap with arguments pushed on the stack. (Cf. null_check_receiver). | |
| 1021 int nargs = method()->arg_size(); | |
| 1022 kit.inc_sp(nargs); | |
| 1023 assert(nargs <= kit.sp() && kit.sp() <= jvms->stk_size(), "sane sp w/ args pushed"); | |
| 1024 if (_reason == Deoptimization::Reason_class_check && | |
| 1025 _action == Deoptimization::Action_maybe_recompile) { | |
| 1026 // Temp fix for 6529811 | |
| 1027 // Don't allow uncommon_trap to override our decision to recompile in the event | |
| 1028 // of a class cast failure for a monomorphic call as it will never let us convert | |
| 1029 // the call to either bi-morphic or megamorphic and can lead to unc-trap loops | |
| 1030 bool keep_exact_action = true; | |
| 1031 kit.uncommon_trap(_reason, _action, NULL, "monomorphic vcall checkcast", false, keep_exact_action); | |
| 1032 } else { | |
| 1033 kit.uncommon_trap(_reason, _action); | |
| 1034 } | |
| 1035 return kit.transfer_exceptions_into_jvms(); | |
| 1036 } | |
| 1037 | |
| 1038 // (Note: Moved hook_up_call to GraphKit::set_edges_for_java_call.) | |
| 1039 | |
| 1040 // (Node: Merged hook_up_exits into ParseGenerator::generate.) | |
| 1041 | |
| 1042 #define NODES_OVERHEAD_PER_METHOD (30.0) | |
| 1043 #define NODES_PER_BYTECODE (9.5) | |
| 1044 | |
| 1045 void WarmCallInfo::init(JVMState* call_site, ciMethod* call_method, ciCallProfile& profile, float prof_factor) { | |
| 1046 int call_count = profile.count(); | |
| 1047 int code_size = call_method->code_size(); | |
| 1048 | |
| 1049 // Expected execution count is based on the historical count: | |
| 1050 _count = call_count < 0 ? 1 : call_site->method()->scale_count(call_count, prof_factor); | |
| 1051 | |
| 1052 // Expected profit from inlining, in units of simple call-overheads. | |
| 1053 _profit = 1.0; | |
| 1054 | |
| 1055 // Expected work performed by the call in units of call-overheads. | |
| 1056 // %%% need an empirical curve fit for "work" (time in call) | |
| 1057 float bytecodes_per_call = 3; | |
| 1058 _work = 1.0 + code_size / bytecodes_per_call; | |
| 1059 | |
| 1060 // Expected size of compilation graph: | |
| 1061 // -XX:+PrintParseStatistics once reported: | |
| 1062 // Methods seen: 9184 Methods parsed: 9184 Nodes created: 1582391 | |
| 1063 // Histogram of 144298 parsed bytecodes: | |
| 1064 // %%% Need an better predictor for graph size. | |
| 1065 _size = NODES_OVERHEAD_PER_METHOD + (NODES_PER_BYTECODE * code_size); | |
| 1066 } | |
| 1067 | |
| 1068 // is_cold: Return true if the node should never be inlined. | |
| 1069 // This is true if any of the key metrics are extreme. | |
| 1070 bool WarmCallInfo::is_cold() const { | |
| 1071 if (count() < WarmCallMinCount) return true; | |
| 1072 if (profit() < WarmCallMinProfit) return true; | |
| 1073 if (work() > WarmCallMaxWork) return true; | |
| 1074 if (size() > WarmCallMaxSize) return true; | |
| 1075 return false; | |
| 1076 } | |
| 1077 | |
| 1078 // is_hot: Return true if the node should be inlined immediately. | |
| 1079 // This is true if any of the key metrics are extreme. | |
| 1080 bool WarmCallInfo::is_hot() const { | |
| 1081 assert(!is_cold(), "eliminate is_cold cases before testing is_hot"); | |
| 1082 if (count() >= HotCallCountThreshold) return true; | |
| 1083 if (profit() >= HotCallProfitThreshold) return true; | |
| 1084 if (work() <= HotCallTrivialWork) return true; | |
| 1085 if (size() <= HotCallTrivialSize) return true; | |
| 1086 return false; | |
| 1087 } | |
| 1088 | |
| 1089 // compute_heat: | |
| 1090 float WarmCallInfo::compute_heat() const { | |
| 1091 assert(!is_cold(), "compute heat only on warm nodes"); | |
| 1092 assert(!is_hot(), "compute heat only on warm nodes"); | |
| 1093 int min_size = MAX2(0, (int)HotCallTrivialSize); | |
| 1094 int max_size = MIN2(500, (int)WarmCallMaxSize); | |
| 1095 float method_size = (size() - min_size) / MAX2(1, max_size - min_size); | |
| 1096 float size_factor; | |
| 1097 if (method_size < 0.05) size_factor = 4; // 2 sigmas better than avg. | |
| 1098 else if (method_size < 0.15) size_factor = 2; // 1 sigma better than avg. | |
| 1099 else if (method_size < 0.5) size_factor = 1; // better than avg. | |
| 1100 else size_factor = 0.5; // worse than avg. | |
| 1101 return (count() * profit() * size_factor); | |
| 1102 } | |
| 1103 | |
| 1104 bool WarmCallInfo::warmer_than(WarmCallInfo* that) { | |
| 1105 assert(this != that, "compare only different WCIs"); | |
| 1106 assert(this->heat() != 0 && that->heat() != 0, "call compute_heat 1st"); | |
| 1107 if (this->heat() > that->heat()) return true; | |
| 1108 if (this->heat() < that->heat()) return false; | |
| 1109 assert(this->heat() == that->heat(), "no NaN heat allowed"); | |
| 1110 // Equal heat. Break the tie some other way. | |
| 1111 if (!this->call() || !that->call()) return (address)this > (address)that; | |
| 1112 return this->call()->_idx > that->call()->_idx; | |
| 1113 } | |
| 1114 | |
| 1115 //#define UNINIT_NEXT ((WarmCallInfo*)badAddress) | |
| 1116 #define UNINIT_NEXT ((WarmCallInfo*)NULL) | |
| 1117 | |
| 1118 WarmCallInfo* WarmCallInfo::insert_into(WarmCallInfo* head) { | |
| 1119 assert(next() == UNINIT_NEXT, "not yet on any list"); | |
| 1120 WarmCallInfo* prev_p = NULL; | |
| 1121 WarmCallInfo* next_p = head; | |
| 1122 while (next_p != NULL && next_p->warmer_than(this)) { | |
| 1123 prev_p = next_p; | |
| 1124 next_p = prev_p->next(); | |
| 1125 } | |
| 1126 // Install this between prev_p and next_p. | |
| 1127 this->set_next(next_p); | |
| 1128 if (prev_p == NULL) | |
| 1129 head = this; | |
| 1130 else | |
| 1131 prev_p->set_next(this); | |
| 1132 return head; | |
| 1133 } | |
| 1134 | |
| 1135 WarmCallInfo* WarmCallInfo::remove_from(WarmCallInfo* head) { | |
| 1136 WarmCallInfo* prev_p = NULL; | |
| 1137 WarmCallInfo* next_p = head; | |
| 1138 while (next_p != this) { | |
| 1139 assert(next_p != NULL, "this must be in the list somewhere"); | |
| 1140 prev_p = next_p; | |
| 1141 next_p = prev_p->next(); | |
| 1142 } | |
| 1143 next_p = this->next(); | |
| 1144 debug_only(this->set_next(UNINIT_NEXT)); | |
| 1145 // Remove this from between prev_p and next_p. | |
| 1146 if (prev_p == NULL) | |
| 1147 head = next_p; | |
| 1148 else | |
| 1149 prev_p->set_next(next_p); | |
| 1150 return head; | |
| 1151 } | |
| 1152 | |
|
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1153 WarmCallInfo WarmCallInfo::_always_hot(WarmCallInfo::MAX_VALUE(), WarmCallInfo::MAX_VALUE(), |
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1154 WarmCallInfo::MIN_VALUE(), WarmCallInfo::MIN_VALUE()); |
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1155 WarmCallInfo WarmCallInfo::_always_cold(WarmCallInfo::MIN_VALUE(), WarmCallInfo::MIN_VALUE(), |
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1156 WarmCallInfo::MAX_VALUE(), WarmCallInfo::MAX_VALUE()); |
| 0 | 1157 |
| 1158 WarmCallInfo* WarmCallInfo::always_hot() { | |
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1159 assert(_always_hot.is_hot(), "must always be hot"); |
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1160 return &_always_hot; |
| 0 | 1161 } |
| 1162 | |
| 1163 WarmCallInfo* WarmCallInfo::always_cold() { | |
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1164 assert(_always_cold.is_cold(), "must always be cold"); |
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1165 return &_always_cold; |
| 0 | 1166 } |
| 1167 | |
| 1168 | |
| 1169 #ifndef PRODUCT | |
| 1170 | |
| 1171 void WarmCallInfo::print() const { | |
| 1172 tty->print("%s : C=%6.1f P=%6.1f W=%6.1f S=%6.1f H=%6.1f -> %p", | |
| 1173 is_cold() ? "cold" : is_hot() ? "hot " : "warm", | |
| 1174 count(), profit(), work(), size(), compute_heat(), next()); | |
| 1175 tty->cr(); | |
| 1176 if (call() != NULL) call()->dump(); | |
| 1177 } | |
| 1178 | |
| 1179 void print_wci(WarmCallInfo* ci) { | |
| 1180 ci->print(); | |
| 1181 } | |
| 1182 | |
| 1183 void WarmCallInfo::print_all() const { | |
| 1184 for (const WarmCallInfo* p = this; p != NULL; p = p->next()) | |
| 1185 p->print(); | |
| 1186 } | |
| 1187 | |
| 1188 int WarmCallInfo::count_all() const { | |
| 1189 int cnt = 0; | |
| 1190 for (const WarmCallInfo* p = this; p != NULL; p = p->next()) | |
| 1191 cnt++; | |
| 1192 return cnt; | |
| 1193 } | |
| 1194 | |
| 1195 #endif //PRODUCT |