Mercurial > hg > truffle
annotate src/share/vm/opto/graphKit.cpp @ 17728:b8413a9cbb84
8031752: Failed speculative optimizations should be reattempted when root of compilation is different
Summary: support for speculative traps that keep track of the root of the compilation in which a trap occurs.
Reviewed-by: kvn, twisti
| author | roland |
|---|---|
| date | Tue, 25 Feb 2014 18:16:24 +0100 |
| parents | f176b09780b0 |
| children | 62825ea7e51f |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2001, 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 "compiler/compileLog.hpp" | |
| 27 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" | |
| 28 #include "gc_implementation/g1/heapRegion.hpp" | |
| 29 #include "gc_interface/collectedHeap.hpp" | |
| 30 #include "memory/barrierSet.hpp" | |
| 31 #include "memory/cardTableModRefBS.hpp" | |
| 32 #include "opto/addnode.hpp" | |
| 33 #include "opto/graphKit.hpp" | |
| 34 #include "opto/idealKit.hpp" | |
| 35 #include "opto/locknode.hpp" | |
| 36 #include "opto/machnode.hpp" | |
| 37 #include "opto/parse.hpp" | |
| 38 #include "opto/rootnode.hpp" | |
| 39 #include "opto/runtime.hpp" | |
| 40 #include "runtime/deoptimization.hpp" | |
| 41 #include "runtime/sharedRuntime.hpp" | |
| 0 | 42 |
| 43 //----------------------------GraphKit----------------------------------------- | |
| 44 // Main utility constructor. | |
| 45 GraphKit::GraphKit(JVMState* jvms) | |
| 46 : Phase(Phase::Parser), | |
| 47 _env(C->env()), | |
| 48 _gvn(*C->initial_gvn()) | |
| 49 { | |
| 50 _exceptions = jvms->map()->next_exception(); | |
| 51 if (_exceptions != NULL) jvms->map()->set_next_exception(NULL); | |
| 52 set_jvms(jvms); | |
| 53 } | |
| 54 | |
| 55 // Private constructor for parser. | |
| 56 GraphKit::GraphKit() | |
| 57 : Phase(Phase::Parser), | |
| 58 _env(C->env()), | |
| 59 _gvn(*C->initial_gvn()) | |
| 60 { | |
| 61 _exceptions = NULL; | |
| 62 set_map(NULL); | |
| 63 debug_only(_sp = -99); | |
| 64 debug_only(set_bci(-99)); | |
| 65 } | |
| 66 | |
| 67 | |
| 68 | |
| 69 //---------------------------clean_stack--------------------------------------- | |
| 70 // Clear away rubbish from the stack area of the JVM state. | |
| 71 // This destroys any arguments that may be waiting on the stack. | |
| 72 void GraphKit::clean_stack(int from_sp) { | |
| 73 SafePointNode* map = this->map(); | |
| 74 JVMState* jvms = this->jvms(); | |
| 75 int stk_size = jvms->stk_size(); | |
| 76 int stkoff = jvms->stkoff(); | |
| 77 Node* top = this->top(); | |
| 78 for (int i = from_sp; i < stk_size; i++) { | |
| 79 if (map->in(stkoff + i) != top) { | |
| 80 map->set_req(stkoff + i, top); | |
| 81 } | |
| 82 } | |
| 83 } | |
| 84 | |
| 85 | |
| 86 //--------------------------------sync_jvms----------------------------------- | |
| 87 // Make sure our current jvms agrees with our parse state. | |
| 88 JVMState* GraphKit::sync_jvms() const { | |
| 89 JVMState* jvms = this->jvms(); | |
| 90 jvms->set_bci(bci()); // Record the new bci in the JVMState | |
| 91 jvms->set_sp(sp()); // Record the new sp in the JVMState | |
| 92 assert(jvms_in_sync(), "jvms is now in sync"); | |
| 93 return jvms; | |
| 94 } | |
| 95 | |
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96 //--------------------------------sync_jvms_for_reexecute--------------------- |
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97 // Make sure our current jvms agrees with our parse state. This version |
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98 // uses the reexecute_sp for reexecuting bytecodes. |
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99 JVMState* GraphKit::sync_jvms_for_reexecute() { |
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100 JVMState* jvms = this->jvms(); |
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101 jvms->set_bci(bci()); // Record the new bci in the JVMState |
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102 jvms->set_sp(reexecute_sp()); // Record the new sp in the JVMState |
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103 return jvms; |
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104 } |
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105 |
| 0 | 106 #ifdef ASSERT |
| 107 bool GraphKit::jvms_in_sync() const { | |
| 108 Parse* parse = is_Parse(); | |
| 109 if (parse == NULL) { | |
| 110 if (bci() != jvms()->bci()) return false; | |
| 111 if (sp() != (int)jvms()->sp()) return false; | |
| 112 return true; | |
| 113 } | |
| 114 if (jvms()->method() != parse->method()) return false; | |
| 115 if (jvms()->bci() != parse->bci()) return false; | |
| 116 int jvms_sp = jvms()->sp(); | |
| 117 if (jvms_sp != parse->sp()) return false; | |
| 118 int jvms_depth = jvms()->depth(); | |
| 119 if (jvms_depth != parse->depth()) return false; | |
| 120 return true; | |
| 121 } | |
| 122 | |
| 123 // Local helper checks for special internal merge points | |
| 124 // used to accumulate and merge exception states. | |
| 125 // They are marked by the region's in(0) edge being the map itself. | |
| 126 // Such merge points must never "escape" into the parser at large, | |
| 127 // until they have been handed to gvn.transform. | |
| 128 static bool is_hidden_merge(Node* reg) { | |
| 129 if (reg == NULL) return false; | |
| 130 if (reg->is_Phi()) { | |
| 131 reg = reg->in(0); | |
| 132 if (reg == NULL) return false; | |
| 133 } | |
| 134 return reg->is_Region() && reg->in(0) != NULL && reg->in(0)->is_Root(); | |
| 135 } | |
| 136 | |
| 137 void GraphKit::verify_map() const { | |
| 138 if (map() == NULL) return; // null map is OK | |
| 139 assert(map()->req() <= jvms()->endoff(), "no extra garbage on map"); | |
| 140 assert(!map()->has_exceptions(), "call add_exception_states_from 1st"); | |
| 141 assert(!is_hidden_merge(control()), "call use_exception_state, not set_map"); | |
| 142 } | |
| 143 | |
| 144 void GraphKit::verify_exception_state(SafePointNode* ex_map) { | |
| 145 assert(ex_map->next_exception() == NULL, "not already part of a chain"); | |
| 146 assert(has_saved_ex_oop(ex_map), "every exception state has an ex_oop"); | |
| 147 } | |
| 148 #endif | |
| 149 | |
| 150 //---------------------------stop_and_kill_map--------------------------------- | |
| 151 // Set _map to NULL, signalling a stop to further bytecode execution. | |
| 152 // First smash the current map's control to a constant, to mark it dead. | |
| 153 void GraphKit::stop_and_kill_map() { | |
| 154 SafePointNode* dead_map = stop(); | |
| 155 if (dead_map != NULL) { | |
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156 dead_map->disconnect_inputs(NULL, C); // Mark the map as killed. |
| 0 | 157 assert(dead_map->is_killed(), "must be so marked"); |
| 158 } | |
| 159 } | |
| 160 | |
| 161 | |
| 162 //--------------------------------stopped-------------------------------------- | |
| 163 // Tell if _map is NULL, or control is top. | |
| 164 bool GraphKit::stopped() { | |
| 165 if (map() == NULL) return true; | |
| 166 else if (control() == top()) return true; | |
| 167 else return false; | |
| 168 } | |
| 169 | |
| 170 | |
| 171 //-----------------------------has_ex_handler---------------------------------- | |
| 172 // Tell if this method or any caller method has exception handlers. | |
| 173 bool GraphKit::has_ex_handler() { | |
| 174 for (JVMState* jvmsp = jvms(); jvmsp != NULL; jvmsp = jvmsp->caller()) { | |
| 175 if (jvmsp->has_method() && jvmsp->method()->has_exception_handlers()) { | |
| 176 return true; | |
| 177 } | |
| 178 } | |
| 179 return false; | |
| 180 } | |
| 181 | |
| 182 //------------------------------save_ex_oop------------------------------------ | |
| 183 // Save an exception without blowing stack contents or other JVM state. | |
| 184 void GraphKit::set_saved_ex_oop(SafePointNode* ex_map, Node* ex_oop) { | |
| 185 assert(!has_saved_ex_oop(ex_map), "clear ex-oop before setting again"); | |
| 186 ex_map->add_req(ex_oop); | |
| 187 debug_only(verify_exception_state(ex_map)); | |
| 188 } | |
| 189 | |
| 190 inline static Node* common_saved_ex_oop(SafePointNode* ex_map, bool clear_it) { | |
| 191 assert(GraphKit::has_saved_ex_oop(ex_map), "ex_oop must be there"); | |
| 192 Node* ex_oop = ex_map->in(ex_map->req()-1); | |
| 193 if (clear_it) ex_map->del_req(ex_map->req()-1); | |
| 194 return ex_oop; | |
| 195 } | |
| 196 | |
| 197 //-----------------------------saved_ex_oop------------------------------------ | |
| 198 // Recover a saved exception from its map. | |
| 199 Node* GraphKit::saved_ex_oop(SafePointNode* ex_map) { | |
| 200 return common_saved_ex_oop(ex_map, false); | |
| 201 } | |
| 202 | |
| 203 //--------------------------clear_saved_ex_oop--------------------------------- | |
| 204 // Erase a previously saved exception from its map. | |
| 205 Node* GraphKit::clear_saved_ex_oop(SafePointNode* ex_map) { | |
| 206 return common_saved_ex_oop(ex_map, true); | |
| 207 } | |
| 208 | |
| 209 #ifdef ASSERT | |
| 210 //---------------------------has_saved_ex_oop---------------------------------- | |
| 211 // Erase a previously saved exception from its map. | |
| 212 bool GraphKit::has_saved_ex_oop(SafePointNode* ex_map) { | |
| 213 return ex_map->req() == ex_map->jvms()->endoff()+1; | |
| 214 } | |
| 215 #endif | |
| 216 | |
| 217 //-------------------------make_exception_state-------------------------------- | |
| 218 // Turn the current JVM state into an exception state, appending the ex_oop. | |
| 219 SafePointNode* GraphKit::make_exception_state(Node* ex_oop) { | |
| 220 sync_jvms(); | |
| 221 SafePointNode* ex_map = stop(); // do not manipulate this map any more | |
| 222 set_saved_ex_oop(ex_map, ex_oop); | |
| 223 return ex_map; | |
| 224 } | |
| 225 | |
| 226 | |
| 227 //--------------------------add_exception_state-------------------------------- | |
| 228 // Add an exception to my list of exceptions. | |
| 229 void GraphKit::add_exception_state(SafePointNode* ex_map) { | |
| 230 if (ex_map == NULL || ex_map->control() == top()) { | |
| 231 return; | |
| 232 } | |
| 233 #ifdef ASSERT | |
| 234 verify_exception_state(ex_map); | |
| 235 if (has_exceptions()) { | |
| 236 assert(ex_map->jvms()->same_calls_as(_exceptions->jvms()), "all collected exceptions must come from the same place"); | |
| 237 } | |
| 238 #endif | |
| 239 | |
| 240 // If there is already an exception of exactly this type, merge with it. | |
| 241 // In particular, null-checks and other low-level exceptions common up here. | |
| 242 Node* ex_oop = saved_ex_oop(ex_map); | |
| 243 const Type* ex_type = _gvn.type(ex_oop); | |
| 244 if (ex_oop == top()) { | |
| 245 // No action needed. | |
| 246 return; | |
| 247 } | |
| 248 assert(ex_type->isa_instptr(), "exception must be an instance"); | |
| 249 for (SafePointNode* e2 = _exceptions; e2 != NULL; e2 = e2->next_exception()) { | |
| 250 const Type* ex_type2 = _gvn.type(saved_ex_oop(e2)); | |
| 251 // We check sp also because call bytecodes can generate exceptions | |
| 252 // both before and after arguments are popped! | |
| 253 if (ex_type2 == ex_type | |
| 254 && e2->_jvms->sp() == ex_map->_jvms->sp()) { | |
| 255 combine_exception_states(ex_map, e2); | |
| 256 return; | |
| 257 } | |
| 258 } | |
| 259 | |
| 260 // No pre-existing exception of the same type. Chain it on the list. | |
| 261 push_exception_state(ex_map); | |
| 262 } | |
| 263 | |
| 264 //-----------------------add_exception_states_from----------------------------- | |
| 265 void GraphKit::add_exception_states_from(JVMState* jvms) { | |
| 266 SafePointNode* ex_map = jvms->map()->next_exception(); | |
| 267 if (ex_map != NULL) { | |
| 268 jvms->map()->set_next_exception(NULL); | |
| 269 for (SafePointNode* next_map; ex_map != NULL; ex_map = next_map) { | |
| 270 next_map = ex_map->next_exception(); | |
| 271 ex_map->set_next_exception(NULL); | |
| 272 add_exception_state(ex_map); | |
| 273 } | |
| 274 } | |
| 275 } | |
| 276 | |
| 277 //-----------------------transfer_exceptions_into_jvms------------------------- | |
| 278 JVMState* GraphKit::transfer_exceptions_into_jvms() { | |
| 279 if (map() == NULL) { | |
| 280 // We need a JVMS to carry the exceptions, but the map has gone away. | |
| 281 // Create a scratch JVMS, cloned from any of the exception states... | |
| 282 if (has_exceptions()) { | |
| 283 _map = _exceptions; | |
| 284 _map = clone_map(); | |
| 285 _map->set_next_exception(NULL); | |
| 286 clear_saved_ex_oop(_map); | |
| 287 debug_only(verify_map()); | |
| 288 } else { | |
| 289 // ...or created from scratch | |
| 290 JVMState* jvms = new (C) JVMState(_method, NULL); | |
| 291 jvms->set_bci(_bci); | |
| 292 jvms->set_sp(_sp); | |
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293 jvms->set_map(new (C) SafePointNode(TypeFunc::Parms, jvms)); |
| 0 | 294 set_jvms(jvms); |
| 295 for (uint i = 0; i < map()->req(); i++) map()->init_req(i, top()); | |
| 296 set_all_memory(top()); | |
| 297 while (map()->req() < jvms->endoff()) map()->add_req(top()); | |
| 298 } | |
| 299 // (This is a kludge, in case you didn't notice.) | |
| 300 set_control(top()); | |
| 301 } | |
| 302 JVMState* jvms = sync_jvms(); | |
| 303 assert(!jvms->map()->has_exceptions(), "no exceptions on this map yet"); | |
| 304 jvms->map()->set_next_exception(_exceptions); | |
| 305 _exceptions = NULL; // done with this set of exceptions | |
| 306 return jvms; | |
| 307 } | |
| 308 | |
| 309 static inline void add_n_reqs(Node* dstphi, Node* srcphi) { | |
| 310 assert(is_hidden_merge(dstphi), "must be a special merge node"); | |
| 311 assert(is_hidden_merge(srcphi), "must be a special merge node"); | |
| 312 uint limit = srcphi->req(); | |
| 313 for (uint i = PhiNode::Input; i < limit; i++) { | |
| 314 dstphi->add_req(srcphi->in(i)); | |
| 315 } | |
| 316 } | |
| 317 static inline void add_one_req(Node* dstphi, Node* src) { | |
| 318 assert(is_hidden_merge(dstphi), "must be a special merge node"); | |
| 319 assert(!is_hidden_merge(src), "must not be a special merge node"); | |
| 320 dstphi->add_req(src); | |
| 321 } | |
| 322 | |
| 323 //-----------------------combine_exception_states------------------------------ | |
| 324 // This helper function combines exception states by building phis on a | |
| 325 // specially marked state-merging region. These regions and phis are | |
| 326 // untransformed, and can build up gradually. The region is marked by | |
| 327 // having a control input of its exception map, rather than NULL. Such | |
| 328 // regions do not appear except in this function, and in use_exception_state. | |
| 329 void GraphKit::combine_exception_states(SafePointNode* ex_map, SafePointNode* phi_map) { | |
| 330 if (failing()) return; // dying anyway... | |
| 331 JVMState* ex_jvms = ex_map->_jvms; | |
| 332 assert(ex_jvms->same_calls_as(phi_map->_jvms), "consistent call chains"); | |
| 333 assert(ex_jvms->stkoff() == phi_map->_jvms->stkoff(), "matching locals"); | |
| 334 assert(ex_jvms->sp() == phi_map->_jvms->sp(), "matching stack sizes"); | |
| 335 assert(ex_jvms->monoff() == phi_map->_jvms->monoff(), "matching JVMS"); | |
| 10278 | 336 assert(ex_jvms->scloff() == phi_map->_jvms->scloff(), "matching scalar replaced objects"); |
| 0 | 337 assert(ex_map->req() == phi_map->req(), "matching maps"); |
| 338 uint tos = ex_jvms->stkoff() + ex_jvms->sp(); | |
| 339 Node* hidden_merge_mark = root(); | |
| 340 Node* region = phi_map->control(); | |
| 341 MergeMemNode* phi_mem = phi_map->merged_memory(); | |
| 342 MergeMemNode* ex_mem = ex_map->merged_memory(); | |
| 343 if (region->in(0) != hidden_merge_mark) { | |
| 344 // The control input is not (yet) a specially-marked region in phi_map. | |
| 345 // Make it so, and build some phis. | |
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346 region = new (C) RegionNode(2); |
| 0 | 347 _gvn.set_type(region, Type::CONTROL); |
| 348 region->set_req(0, hidden_merge_mark); // marks an internal ex-state | |
| 349 region->init_req(1, phi_map->control()); | |
| 350 phi_map->set_control(region); | |
| 351 Node* io_phi = PhiNode::make(region, phi_map->i_o(), Type::ABIO); | |
| 352 record_for_igvn(io_phi); | |
| 353 _gvn.set_type(io_phi, Type::ABIO); | |
| 354 phi_map->set_i_o(io_phi); | |
| 355 for (MergeMemStream mms(phi_mem); mms.next_non_empty(); ) { | |
| 356 Node* m = mms.memory(); | |
| 357 Node* m_phi = PhiNode::make(region, m, Type::MEMORY, mms.adr_type(C)); | |
| 358 record_for_igvn(m_phi); | |
| 359 _gvn.set_type(m_phi, Type::MEMORY); | |
| 360 mms.set_memory(m_phi); | |
| 361 } | |
| 362 } | |
| 363 | |
| 364 // Either or both of phi_map and ex_map might already be converted into phis. | |
| 365 Node* ex_control = ex_map->control(); | |
| 366 // if there is special marking on ex_map also, we add multiple edges from src | |
| 367 bool add_multiple = (ex_control->in(0) == hidden_merge_mark); | |
| 368 // how wide was the destination phi_map, originally? | |
| 369 uint orig_width = region->req(); | |
| 370 | |
| 371 if (add_multiple) { | |
| 372 add_n_reqs(region, ex_control); | |
| 373 add_n_reqs(phi_map->i_o(), ex_map->i_o()); | |
| 374 } else { | |
| 375 // ex_map has no merges, so we just add single edges everywhere | |
| 376 add_one_req(region, ex_control); | |
| 377 add_one_req(phi_map->i_o(), ex_map->i_o()); | |
| 378 } | |
| 379 for (MergeMemStream mms(phi_mem, ex_mem); mms.next_non_empty2(); ) { | |
| 380 if (mms.is_empty()) { | |
| 381 // get a copy of the base memory, and patch some inputs into it | |
| 382 const TypePtr* adr_type = mms.adr_type(C); | |
| 383 Node* phi = mms.force_memory()->as_Phi()->slice_memory(adr_type); | |
| 384 assert(phi->as_Phi()->region() == mms.base_memory()->in(0), ""); | |
| 385 mms.set_memory(phi); | |
| 386 // Prepare to append interesting stuff onto the newly sliced phi: | |
| 387 while (phi->req() > orig_width) phi->del_req(phi->req()-1); | |
| 388 } | |
| 389 // Append stuff from ex_map: | |
| 390 if (add_multiple) { | |
| 391 add_n_reqs(mms.memory(), mms.memory2()); | |
| 392 } else { | |
| 393 add_one_req(mms.memory(), mms.memory2()); | |
| 394 } | |
| 395 } | |
| 396 uint limit = ex_map->req(); | |
| 397 for (uint i = TypeFunc::Parms; i < limit; i++) { | |
| 398 // Skip everything in the JVMS after tos. (The ex_oop follows.) | |
| 399 if (i == tos) i = ex_jvms->monoff(); | |
| 400 Node* src = ex_map->in(i); | |
| 401 Node* dst = phi_map->in(i); | |
| 402 if (src != dst) { | |
| 403 PhiNode* phi; | |
| 404 if (dst->in(0) != region) { | |
| 405 dst = phi = PhiNode::make(region, dst, _gvn.type(dst)); | |
| 406 record_for_igvn(phi); | |
| 407 _gvn.set_type(phi, phi->type()); | |
| 408 phi_map->set_req(i, dst); | |
| 409 // Prepare to append interesting stuff onto the new phi: | |
| 410 while (dst->req() > orig_width) dst->del_req(dst->req()-1); | |
| 411 } else { | |
| 412 assert(dst->is_Phi(), "nobody else uses a hidden region"); | |
| 10278 | 413 phi = dst->as_Phi(); |
| 0 | 414 } |
| 415 if (add_multiple && src->in(0) == ex_control) { | |
| 416 // Both are phis. | |
| 417 add_n_reqs(dst, src); | |
| 418 } else { | |
| 419 while (dst->req() < region->req()) add_one_req(dst, src); | |
| 420 } | |
| 421 const Type* srctype = _gvn.type(src); | |
| 422 if (phi->type() != srctype) { | |
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423 const Type* dsttype = phi->type()->meet_speculative(srctype); |
| 0 | 424 if (phi->type() != dsttype) { |
| 425 phi->set_type(dsttype); | |
| 426 _gvn.set_type(phi, dsttype); | |
| 427 } | |
| 428 } | |
| 429 } | |
| 430 } | |
| 431 } | |
| 432 | |
| 433 //--------------------------use_exception_state-------------------------------- | |
| 434 Node* GraphKit::use_exception_state(SafePointNode* phi_map) { | |
| 435 if (failing()) { stop(); return top(); } | |
| 436 Node* region = phi_map->control(); | |
| 437 Node* hidden_merge_mark = root(); | |
| 438 assert(phi_map->jvms()->map() == phi_map, "sanity: 1-1 relation"); | |
| 439 Node* ex_oop = clear_saved_ex_oop(phi_map); | |
| 440 if (region->in(0) == hidden_merge_mark) { | |
| 441 // Special marking for internal ex-states. Process the phis now. | |
| 442 region->set_req(0, region); // now it's an ordinary region | |
| 443 set_jvms(phi_map->jvms()); // ...so now we can use it as a map | |
| 444 // Note: Setting the jvms also sets the bci and sp. | |
| 445 set_control(_gvn.transform(region)); | |
| 446 uint tos = jvms()->stkoff() + sp(); | |
| 447 for (uint i = 1; i < tos; i++) { | |
| 448 Node* x = phi_map->in(i); | |
| 449 if (x->in(0) == region) { | |
| 450 assert(x->is_Phi(), "expected a special phi"); | |
| 451 phi_map->set_req(i, _gvn.transform(x)); | |
| 452 } | |
| 453 } | |
| 454 for (MergeMemStream mms(merged_memory()); mms.next_non_empty(); ) { | |
| 455 Node* x = mms.memory(); | |
| 456 if (x->in(0) == region) { | |
| 457 assert(x->is_Phi(), "nobody else uses a hidden region"); | |
| 458 mms.set_memory(_gvn.transform(x)); | |
| 459 } | |
| 460 } | |
| 461 if (ex_oop->in(0) == region) { | |
| 462 assert(ex_oop->is_Phi(), "expected a special phi"); | |
| 463 ex_oop = _gvn.transform(ex_oop); | |
| 464 } | |
| 465 } else { | |
| 466 set_jvms(phi_map->jvms()); | |
| 467 } | |
| 468 | |
| 469 assert(!is_hidden_merge(phi_map->control()), "hidden ex. states cleared"); | |
| 470 assert(!is_hidden_merge(phi_map->i_o()), "hidden ex. states cleared"); | |
| 471 return ex_oop; | |
| 472 } | |
| 473 | |
| 474 //---------------------------------java_bc------------------------------------- | |
| 475 Bytecodes::Code GraphKit::java_bc() const { | |
| 476 ciMethod* method = this->method(); | |
| 477 int bci = this->bci(); | |
| 478 if (method != NULL && bci != InvocationEntryBci) | |
| 479 return method->java_code_at_bci(bci); | |
| 480 else | |
| 481 return Bytecodes::_illegal; | |
| 482 } | |
| 483 | |
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484 void GraphKit::uncommon_trap_if_should_post_on_exceptions(Deoptimization::DeoptReason reason, |
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485 bool must_throw) { |
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486 // if the exception capability is set, then we will generate code |
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487 // to check the JavaThread.should_post_on_exceptions flag to see |
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488 // if we actually need to report exception events (for this |
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489 // thread). If we don't need to report exception events, we will |
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490 // take the normal fast path provided by add_exception_events. If |
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491 // exception event reporting is enabled for this thread, we will |
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492 // take the uncommon_trap in the BuildCutout below. |
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493 |
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494 // first must access the should_post_on_exceptions_flag in this thread's JavaThread |
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495 Node* jthread = _gvn.transform(new (C) ThreadLocalNode()); |
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496 Node* adr = basic_plus_adr(top(), jthread, in_bytes(JavaThread::should_post_on_exceptions_flag_offset())); |
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497 Node* should_post_flag = make_load(control(), adr, TypeInt::INT, T_INT, Compile::AliasIdxRaw, false); |
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498 |
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499 // Test the should_post_on_exceptions_flag vs. 0 |
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500 Node* chk = _gvn.transform( new (C) CmpINode(should_post_flag, intcon(0)) ); |
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501 Node* tst = _gvn.transform( new (C) BoolNode(chk, BoolTest::eq) ); |
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502 |
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503 // Branch to slow_path if should_post_on_exceptions_flag was true |
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504 { BuildCutout unless(this, tst, PROB_MAX); |
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505 // Do not try anything fancy if we're notifying the VM on every throw. |
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506 // Cf. case Bytecodes::_athrow in parse2.cpp. |
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507 uncommon_trap(reason, Deoptimization::Action_none, |
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508 (ciKlass*)NULL, (char*)NULL, must_throw); |
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509 } |
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510 |
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511 } |
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512 |
| 0 | 513 //------------------------------builtin_throw---------------------------------- |
| 514 void GraphKit::builtin_throw(Deoptimization::DeoptReason reason, Node* arg) { | |
| 515 bool must_throw = true; | |
| 516 | |
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517 if (env()->jvmti_can_post_on_exceptions()) { |
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518 // check if we must post exception events, take uncommon trap if so |
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519 uncommon_trap_if_should_post_on_exceptions(reason, must_throw); |
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520 // here if should_post_on_exceptions is false |
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521 // continue on with the normal codegen |
| 0 | 522 } |
| 523 | |
| 524 // If this particular condition has not yet happened at this | |
| 525 // bytecode, then use the uncommon trap mechanism, and allow for | |
| 526 // a future recompilation if several traps occur here. | |
| 527 // If the throw is hot, try to use a more complicated inline mechanism | |
| 528 // which keeps execution inside the compiled code. | |
| 529 bool treat_throw_as_hot = false; | |
| 530 ciMethodData* md = method()->method_data(); | |
| 531 | |
| 532 if (ProfileTraps) { | |
| 533 if (too_many_traps(reason)) { | |
| 534 treat_throw_as_hot = true; | |
| 535 } | |
| 536 // (If there is no MDO at all, assume it is early in | |
| 537 // execution, and that any deopts are part of the | |
| 538 // startup transient, and don't need to be remembered.) | |
| 539 | |
| 540 // Also, if there is a local exception handler, treat all throws | |
| 541 // as hot if there has been at least one in this method. | |
| 542 if (C->trap_count(reason) != 0 | |
| 543 && method()->method_data()->trap_count(reason) != 0 | |
| 544 && has_ex_handler()) { | |
| 545 treat_throw_as_hot = true; | |
| 546 } | |
| 547 } | |
| 548 | |
| 549 // If this throw happens frequently, an uncommon trap might cause | |
| 550 // a performance pothole. If there is a local exception handler, | |
| 551 // and if this particular bytecode appears to be deoptimizing often, | |
| 552 // let us handle the throw inline, with a preconstructed instance. | |
| 553 // Note: If the deopt count has blown up, the uncommon trap | |
| 554 // runtime is going to flush this nmethod, not matter what. | |
| 555 if (treat_throw_as_hot | |
| 556 && (!StackTraceInThrowable || OmitStackTraceInFastThrow)) { | |
| 557 // If the throw is local, we use a pre-existing instance and | |
| 558 // punt on the backtrace. This would lead to a missing backtrace | |
| 559 // (a repeat of 4292742) if the backtrace object is ever asked | |
| 560 // for its backtrace. | |
| 561 // Fixing this remaining case of 4292742 requires some flavor of | |
| 562 // escape analysis. Leave that for the future. | |
| 563 ciInstance* ex_obj = NULL; | |
| 564 switch (reason) { | |
| 565 case Deoptimization::Reason_null_check: | |
| 566 ex_obj = env()->NullPointerException_instance(); | |
| 567 break; | |
| 568 case Deoptimization::Reason_div0_check: | |
| 569 ex_obj = env()->ArithmeticException_instance(); | |
| 570 break; | |
| 571 case Deoptimization::Reason_range_check: | |
| 572 ex_obj = env()->ArrayIndexOutOfBoundsException_instance(); | |
| 573 break; | |
| 574 case Deoptimization::Reason_class_check: | |
| 575 if (java_bc() == Bytecodes::_aastore) { | |
| 576 ex_obj = env()->ArrayStoreException_instance(); | |
| 577 } else { | |
| 578 ex_obj = env()->ClassCastException_instance(); | |
| 579 } | |
| 580 break; | |
| 581 } | |
| 582 if (failing()) { stop(); return; } // exception allocation might fail | |
| 583 if (ex_obj != NULL) { | |
| 584 // Cheat with a preallocated exception object. | |
| 585 if (C->log() != NULL) | |
| 586 C->log()->elem("hot_throw preallocated='1' reason='%s'", | |
| 587 Deoptimization::trap_reason_name(reason)); | |
| 588 const TypeInstPtr* ex_con = TypeInstPtr::make(ex_obj); | |
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589 Node* ex_node = _gvn.transform( ConNode::make(C, ex_con) ); |
| 0 | 590 |
| 591 // Clear the detail message of the preallocated exception object. | |
| 592 // Weblogic sometimes mutates the detail message of exceptions | |
| 593 // using reflection. | |
| 594 int offset = java_lang_Throwable::get_detailMessage_offset(); | |
| 595 const TypePtr* adr_typ = ex_con->add_offset(offset); | |
| 596 | |
| 597 Node *adr = basic_plus_adr(ex_node, ex_node, offset); | |
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598 const TypeOopPtr* val_type = TypeOopPtr::make_from_klass(env()->String_klass()); |
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599 Node *store = store_oop_to_object(control(), ex_node, adr, adr_typ, null(), val_type, T_OBJECT); |
| 0 | 600 |
| 601 add_exception_state(make_exception_state(ex_node)); | |
| 602 return; | |
| 603 } | |
| 604 } | |
| 605 | |
| 606 // %%% Maybe add entry to OptoRuntime which directly throws the exc.? | |
| 607 // It won't be much cheaper than bailing to the interp., since we'll | |
| 608 // have to pass up all the debug-info, and the runtime will have to | |
| 609 // create the stack trace. | |
| 610 | |
| 611 // Usual case: Bail to interpreter. | |
| 612 // Reserve the right to recompile if we haven't seen anything yet. | |
| 613 | |
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614 assert(!Deoptimization::reason_is_speculate(reason), "unsupported"); |
| 0 | 615 Deoptimization::DeoptAction action = Deoptimization::Action_maybe_recompile; |
| 616 if (treat_throw_as_hot | |
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617 && (method()->method_data()->trap_recompiled_at(bci(), NULL) |
| 0 | 618 || C->too_many_traps(reason))) { |
| 619 // We cannot afford to take more traps here. Suffer in the interpreter. | |
| 620 if (C->log() != NULL) | |
| 621 C->log()->elem("hot_throw preallocated='0' reason='%s' mcount='%d'", | |
| 622 Deoptimization::trap_reason_name(reason), | |
| 623 C->trap_count(reason)); | |
| 624 action = Deoptimization::Action_none; | |
| 625 } | |
| 626 | |
| 627 // "must_throw" prunes the JVM state to include only the stack, if there | |
| 628 // are no local exception handlers. This should cut down on register | |
| 629 // allocation time and code size, by drastically reducing the number | |
| 630 // of in-edges on the call to the uncommon trap. | |
| 631 | |
| 632 uncommon_trap(reason, action, (ciKlass*)NULL, (char*)NULL, must_throw); | |
| 633 } | |
| 634 | |
| 635 | |
| 636 //----------------------------PreserveJVMState--------------------------------- | |
| 637 PreserveJVMState::PreserveJVMState(GraphKit* kit, bool clone_map) { | |
| 638 debug_only(kit->verify_map()); | |
| 639 _kit = kit; | |
| 640 _map = kit->map(); // preserve the map | |
| 641 _sp = kit->sp(); | |
| 642 kit->set_map(clone_map ? kit->clone_map() : NULL); | |
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643 Compile::current()->inc_preserve_jvm_state(); |
| 0 | 644 #ifdef ASSERT |
| 645 _bci = kit->bci(); | |
| 646 Parse* parser = kit->is_Parse(); | |
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647 int block = (parser == NULL || parser->block() == NULL) ? -1 : parser->block()->rpo(); |
| 0 | 648 _block = block; |
| 649 #endif | |
| 650 } | |
| 651 PreserveJVMState::~PreserveJVMState() { | |
| 652 GraphKit* kit = _kit; | |
| 653 #ifdef ASSERT | |
| 654 assert(kit->bci() == _bci, "bci must not shift"); | |
| 655 Parse* parser = kit->is_Parse(); | |
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656 int block = (parser == NULL || parser->block() == NULL) ? -1 : parser->block()->rpo(); |
| 0 | 657 assert(block == _block, "block must not shift"); |
| 658 #endif | |
| 659 kit->set_map(_map); | |
| 660 kit->set_sp(_sp); | |
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661 Compile::current()->dec_preserve_jvm_state(); |
| 0 | 662 } |
| 663 | |
| 664 | |
| 665 //-----------------------------BuildCutout------------------------------------- | |
| 666 BuildCutout::BuildCutout(GraphKit* kit, Node* p, float prob, float cnt) | |
| 667 : PreserveJVMState(kit) | |
| 668 { | |
| 669 assert(p->is_Con() || p->is_Bool(), "test must be a bool"); | |
| 670 SafePointNode* outer_map = _map; // preserved map is caller's | |
| 671 SafePointNode* inner_map = kit->map(); | |
| 672 IfNode* iff = kit->create_and_map_if(outer_map->control(), p, prob, cnt); | |
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673 outer_map->set_control(kit->gvn().transform( new (kit->C) IfTrueNode(iff) )); |
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674 inner_map->set_control(kit->gvn().transform( new (kit->C) IfFalseNode(iff) )); |
| 0 | 675 } |
| 676 BuildCutout::~BuildCutout() { | |
| 677 GraphKit* kit = _kit; | |
| 678 assert(kit->stopped(), "cutout code must stop, throw, return, etc."); | |
| 679 } | |
| 680 | |
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681 //---------------------------PreserveReexecuteState---------------------------- |
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682 PreserveReexecuteState::PreserveReexecuteState(GraphKit* kit) { |
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683 assert(!kit->stopped(), "must call stopped() before"); |
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684 _kit = kit; |
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685 _sp = kit->sp(); |
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686 _reexecute = kit->jvms()->_reexecute; |
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687 } |
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688 PreserveReexecuteState::~PreserveReexecuteState() { |
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689 if (_kit->stopped()) return; |
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690 _kit->jvms()->_reexecute = _reexecute; |
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691 _kit->set_sp(_sp); |
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692 } |
| 0 | 693 |
| 694 //------------------------------clone_map-------------------------------------- | |
| 695 // Implementation of PreserveJVMState | |
| 696 // | |
| 697 // Only clone_map(...) here. If this function is only used in the | |
| 698 // PreserveJVMState class we may want to get rid of this extra | |
| 699 // function eventually and do it all there. | |
| 700 | |
| 701 SafePointNode* GraphKit::clone_map() { | |
| 702 if (map() == NULL) return NULL; | |
| 703 | |
| 704 // Clone the memory edge first | |
| 705 Node* mem = MergeMemNode::make(C, map()->memory()); | |
| 706 gvn().set_type_bottom(mem); | |
| 707 | |
| 708 SafePointNode *clonemap = (SafePointNode*)map()->clone(); | |
| 709 JVMState* jvms = this->jvms(); | |
| 710 JVMState* clonejvms = jvms->clone_shallow(C); | |
| 711 clonemap->set_memory(mem); | |
| 712 clonemap->set_jvms(clonejvms); | |
| 713 clonejvms->set_map(clonemap); | |
| 714 record_for_igvn(clonemap); | |
| 715 gvn().set_type_bottom(clonemap); | |
| 716 return clonemap; | |
| 717 } | |
| 718 | |
| 719 | |
| 720 //-----------------------------set_map_clone----------------------------------- | |
| 721 void GraphKit::set_map_clone(SafePointNode* m) { | |
| 722 _map = m; | |
| 723 _map = clone_map(); | |
| 724 _map->set_next_exception(NULL); | |
| 725 debug_only(verify_map()); | |
| 726 } | |
| 727 | |
| 728 | |
| 729 //----------------------------kill_dead_locals--------------------------------- | |
| 730 // Detect any locals which are known to be dead, and force them to top. | |
| 731 void GraphKit::kill_dead_locals() { | |
| 732 // Consult the liveness information for the locals. If any | |
| 733 // of them are unused, then they can be replaced by top(). This | |
| 734 // should help register allocation time and cut down on the size | |
| 735 // of the deoptimization information. | |
| 736 | |
| 737 // This call is made from many of the bytecode handling | |
| 738 // subroutines called from the Big Switch in do_one_bytecode. | |
| 739 // Every bytecode which might include a slow path is responsible | |
| 740 // for killing its dead locals. The more consistent we | |
| 741 // are about killing deads, the fewer useless phis will be | |
| 742 // constructed for them at various merge points. | |
| 743 | |
| 744 // bci can be -1 (InvocationEntryBci). We return the entry | |
| 745 // liveness for the method. | |
| 746 | |
| 747 if (method() == NULL || method()->code_size() == 0) { | |
| 748 // We are building a graph for a call to a native method. | |
| 749 // All locals are live. | |
| 750 return; | |
| 751 } | |
| 752 | |
| 753 ResourceMark rm; | |
| 754 | |
| 755 // Consult the liveness information for the locals. If any | |
| 756 // of them are unused, then they can be replaced by top(). This | |
| 757 // should help register allocation time and cut down on the size | |
| 758 // of the deoptimization information. | |
| 759 MethodLivenessResult live_locals = method()->liveness_at_bci(bci()); | |
| 760 | |
| 761 int len = (int)live_locals.size(); | |
| 762 assert(len <= jvms()->loc_size(), "too many live locals"); | |
| 763 for (int local = 0; local < len; local++) { | |
| 764 if (!live_locals.at(local)) { | |
| 765 set_local(local, top()); | |
| 766 } | |
| 767 } | |
| 768 } | |
| 769 | |
| 770 #ifdef ASSERT | |
| 771 //-------------------------dead_locals_are_killed------------------------------ | |
| 772 // Return true if all dead locals are set to top in the map. | |
| 773 // Used to assert "clean" debug info at various points. | |
| 774 bool GraphKit::dead_locals_are_killed() { | |
| 775 if (method() == NULL || method()->code_size() == 0) { | |
| 776 // No locals need to be dead, so all is as it should be. | |
| 777 return true; | |
| 778 } | |
| 779 | |
| 780 // Make sure somebody called kill_dead_locals upstream. | |
| 781 ResourceMark rm; | |
| 782 for (JVMState* jvms = this->jvms(); jvms != NULL; jvms = jvms->caller()) { | |
| 783 if (jvms->loc_size() == 0) continue; // no locals to consult | |
| 784 SafePointNode* map = jvms->map(); | |
| 785 ciMethod* method = jvms->method(); | |
| 786 int bci = jvms->bci(); | |
| 787 if (jvms == this->jvms()) { | |
| 788 bci = this->bci(); // it might not yet be synched | |
| 789 } | |
| 790 MethodLivenessResult live_locals = method->liveness_at_bci(bci); | |
| 791 int len = (int)live_locals.size(); | |
| 792 if (!live_locals.is_valid() || len == 0) | |
| 793 // This method is trivial, or is poisoned by a breakpoint. | |
| 794 return true; | |
| 795 assert(len == jvms->loc_size(), "live map consistent with locals map"); | |
| 796 for (int local = 0; local < len; local++) { | |
| 797 if (!live_locals.at(local) && map->local(jvms, local) != top()) { | |
| 798 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
| 799 tty->print_cr("Zombie local %d: ", local); | |
| 800 jvms->dump(); | |
| 801 } | |
| 802 return false; | |
| 803 } | |
| 804 } | |
| 805 } | |
| 806 return true; | |
| 807 } | |
| 808 | |
| 809 #endif //ASSERT | |
| 810 | |
|
900
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811 // Helper function for enforcing certain bytecodes to reexecute if |
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812 // deoptimization happens |
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813 static bool should_reexecute_implied_by_bytecode(JVMState *jvms, bool is_anewarray) { |
|
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814 ciMethod* cur_method = jvms->method(); |
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815 int cur_bci = jvms->bci(); |
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816 if (cur_method != NULL && cur_bci != InvocationEntryBci) { |
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817 Bytecodes::Code code = cur_method->java_code_at_bci(cur_bci); |
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818 return Interpreter::bytecode_should_reexecute(code) || |
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819 is_anewarray && code == Bytecodes::_multianewarray; |
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820 // Reexecute _multianewarray bytecode which was replaced with |
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821 // sequence of [a]newarray. See Parse::do_multianewarray(). |
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822 // |
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823 // Note: interpreter should not have it set since this optimization |
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824 // is limited by dimensions and guarded by flag so in some cases |
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825 // multianewarray() runtime calls will be generated and |
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826 // the bytecode should not be reexecutes (stack will not be reset). |
|
900
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827 } else |
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828 return false; |
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829 } |
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830 |
| 0 | 831 // Helper function for adding JVMState and debug information to node |
| 832 void GraphKit::add_safepoint_edges(SafePointNode* call, bool must_throw) { | |
| 833 // Add the safepoint edges to the call (or other safepoint). | |
| 834 | |
| 835 // Make sure dead locals are set to top. This | |
| 836 // should help register allocation time and cut down on the size | |
| 837 // of the deoptimization information. | |
| 838 assert(dead_locals_are_killed(), "garbage in debug info before safepoint"); | |
| 839 | |
| 840 // Walk the inline list to fill in the correct set of JVMState's | |
| 841 // Also fill in the associated edges for each JVMState. | |
| 842 | |
|
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843 // If the bytecode needs to be reexecuted we need to put |
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844 // the arguments back on the stack. |
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845 const bool should_reexecute = jvms()->should_reexecute(); |
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846 JVMState* youngest_jvms = should_reexecute ? sync_jvms_for_reexecute() : sync_jvms(); |
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847 |
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848 // NOTE: set_bci (called from sync_jvms) might reset the reexecute bit to |
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849 // undefined if the bci is different. This is normal for Parse but it |
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850 // should not happen for LibraryCallKit because only one bci is processed. |
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851 assert(!is_LibraryCallKit() || (jvms()->should_reexecute() == should_reexecute), |
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852 "in LibraryCallKit the reexecute bit should not change"); |
| 0 | 853 |
| 854 // If we are guaranteed to throw, we can prune everything but the | |
| 855 // input to the current bytecode. | |
| 856 bool can_prune_locals = false; | |
| 857 uint stack_slots_not_pruned = 0; | |
| 858 int inputs = 0, depth = 0; | |
| 859 if (must_throw) { | |
| 860 assert(method() == youngest_jvms->method(), "sanity"); | |
| 861 if (compute_stack_effects(inputs, depth)) { | |
| 862 can_prune_locals = true; | |
| 863 stack_slots_not_pruned = inputs; | |
| 864 } | |
| 865 } | |
| 866 | |
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867 if (env()->jvmti_can_access_local_variables()) { |
| 0 | 868 // At any safepoint, this method can get breakpointed, which would |
| 869 // then require an immediate deoptimization. | |
| 870 can_prune_locals = false; // do not prune locals | |
| 871 stack_slots_not_pruned = 0; | |
| 872 } | |
| 873 | |
| 874 // do not scribble on the input jvms | |
| 875 JVMState* out_jvms = youngest_jvms->clone_deep(C); | |
| 876 call->set_jvms(out_jvms); // Start jvms list for call node | |
| 877 | |
|
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878 // For a known set of bytecodes, the interpreter should reexecute them if |
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879 // deoptimization happens. We set the reexecute state for them here |
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880 if (out_jvms->is_reexecute_undefined() && //don't change if already specified |
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881 should_reexecute_implied_by_bytecode(out_jvms, call->is_AllocateArray())) { |
|
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882 out_jvms->set_should_reexecute(true); //NOTE: youngest_jvms not changed |
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883 } |
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884 |
| 0 | 885 // Presize the call: |
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886 DEBUG_ONLY(uint non_debug_edges = call->req()); |
| 0 | 887 call->add_req_batch(top(), youngest_jvms->debug_depth()); |
| 888 assert(call->req() == non_debug_edges + youngest_jvms->debug_depth(), ""); | |
| 889 | |
| 890 // Set up edges so that the call looks like this: | |
| 891 // Call [state:] ctl io mem fptr retadr | |
| 892 // [parms:] parm0 ... parmN | |
| 893 // [root:] loc0 ... locN stk0 ... stkSP mon0 obj0 ... monN objN | |
| 894 // [...mid:] loc0 ... locN stk0 ... stkSP mon0 obj0 ... monN objN [...] | |
| 895 // [young:] loc0 ... locN stk0 ... stkSP mon0 obj0 ... monN objN | |
| 896 // Note that caller debug info precedes callee debug info. | |
| 897 | |
| 898 // Fill pointer walks backwards from "young:" to "root:" in the diagram above: | |
| 899 uint debug_ptr = call->req(); | |
| 900 | |
| 901 // Loop over the map input edges associated with jvms, add them | |
| 902 // to the call node, & reset all offsets to match call node array. | |
| 903 for (JVMState* in_jvms = youngest_jvms; in_jvms != NULL; ) { | |
| 904 uint debug_end = debug_ptr; | |
| 905 uint debug_start = debug_ptr - in_jvms->debug_size(); | |
| 906 debug_ptr = debug_start; // back up the ptr | |
| 907 | |
| 908 uint p = debug_start; // walks forward in [debug_start, debug_end) | |
| 909 uint j, k, l; | |
| 910 SafePointNode* in_map = in_jvms->map(); | |
| 911 out_jvms->set_map(call); | |
| 912 | |
| 913 if (can_prune_locals) { | |
| 914 assert(in_jvms->method() == out_jvms->method(), "sanity"); | |
| 915 // If the current throw can reach an exception handler in this JVMS, | |
| 916 // then we must keep everything live that can reach that handler. | |
| 917 // As a quick and dirty approximation, we look for any handlers at all. | |
| 918 if (in_jvms->method()->has_exception_handlers()) { | |
| 919 can_prune_locals = false; | |
| 920 } | |
| 921 } | |
| 922 | |
| 923 // Add the Locals | |
| 924 k = in_jvms->locoff(); | |
| 925 l = in_jvms->loc_size(); | |
| 926 out_jvms->set_locoff(p); | |
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927 if (!can_prune_locals) { |
| 0 | 928 for (j = 0; j < l; j++) |
| 929 call->set_req(p++, in_map->in(k+j)); | |
| 930 } else { | |
| 931 p += l; // already set to top above by add_req_batch | |
| 932 } | |
| 933 | |
| 934 // Add the Expression Stack | |
| 935 k = in_jvms->stkoff(); | |
| 936 l = in_jvms->sp(); | |
| 937 out_jvms->set_stkoff(p); | |
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938 if (!can_prune_locals) { |
| 0 | 939 for (j = 0; j < l; j++) |
| 940 call->set_req(p++, in_map->in(k+j)); | |
| 941 } else if (can_prune_locals && stack_slots_not_pruned != 0) { | |
| 942 // Divide stack into {S0,...,S1}, where S0 is set to top. | |
| 943 uint s1 = stack_slots_not_pruned; | |
| 944 stack_slots_not_pruned = 0; // for next iteration | |
| 945 if (s1 > l) s1 = l; | |
| 946 uint s0 = l - s1; | |
| 947 p += s0; // skip the tops preinstalled by add_req_batch | |
| 948 for (j = s0; j < l; j++) | |
| 949 call->set_req(p++, in_map->in(k+j)); | |
| 950 } else { | |
| 951 p += l; // already set to top above by add_req_batch | |
| 952 } | |
| 953 | |
| 954 // Add the Monitors | |
| 955 k = in_jvms->monoff(); | |
| 956 l = in_jvms->mon_size(); | |
| 957 out_jvms->set_monoff(p); | |
| 958 for (j = 0; j < l; j++) | |
| 959 call->set_req(p++, in_map->in(k+j)); | |
| 960 | |
|
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961 // Copy any scalar object fields. |
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962 k = in_jvms->scloff(); |
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963 l = in_jvms->scl_size(); |
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964 out_jvms->set_scloff(p); |
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965 for (j = 0; j < l; j++) |
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966 call->set_req(p++, in_map->in(k+j)); |
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967 |
| 0 | 968 // Finish the new jvms. |
| 969 out_jvms->set_endoff(p); | |
| 970 | |
| 971 assert(out_jvms->endoff() == debug_end, "fill ptr must match"); | |
| 972 assert(out_jvms->depth() == in_jvms->depth(), "depth must match"); | |
| 973 assert(out_jvms->loc_size() == in_jvms->loc_size(), "size must match"); | |
| 974 assert(out_jvms->mon_size() == in_jvms->mon_size(), "size must match"); | |
|
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975 assert(out_jvms->scl_size() == in_jvms->scl_size(), "size must match"); |
| 0 | 976 assert(out_jvms->debug_size() == in_jvms->debug_size(), "size must match"); |
| 977 | |
| 978 // Update the two tail pointers in parallel. | |
| 979 out_jvms = out_jvms->caller(); | |
| 980 in_jvms = in_jvms->caller(); | |
| 981 } | |
| 982 | |
| 983 assert(debug_ptr == non_debug_edges, "debug info must fit exactly"); | |
| 984 | |
| 985 // Test the correctness of JVMState::debug_xxx accessors: | |
| 986 assert(call->jvms()->debug_start() == non_debug_edges, ""); | |
| 987 assert(call->jvms()->debug_end() == call->req(), ""); | |
| 988 assert(call->jvms()->debug_depth() == call->req() - non_debug_edges, ""); | |
| 989 } | |
| 990 | |
|
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991 bool GraphKit::compute_stack_effects(int& inputs, int& depth) { |
| 0 | 992 Bytecodes::Code code = java_bc(); |
| 993 if (code == Bytecodes::_wide) { | |
| 994 code = method()->java_code_at_bci(bci() + 1); | |
| 995 } | |
| 996 | |
| 997 BasicType rtype = T_ILLEGAL; | |
| 998 int rsize = 0; | |
| 999 | |
| 1000 if (code != Bytecodes::_illegal) { | |
| 1001 depth = Bytecodes::depth(code); // checkcast=0, athrow=-1 | |
| 1002 rtype = Bytecodes::result_type(code); // checkcast=P, athrow=V | |
| 1003 if (rtype < T_CONFLICT) | |
| 1004 rsize = type2size[rtype]; | |
| 1005 } | |
| 1006 | |
| 1007 switch (code) { | |
| 1008 case Bytecodes::_illegal: | |
| 1009 return false; | |
| 1010 | |
| 1011 case Bytecodes::_ldc: | |
| 1012 case Bytecodes::_ldc_w: | |
| 1013 case Bytecodes::_ldc2_w: | |
| 1014 inputs = 0; | |
| 1015 break; | |
| 1016 | |
| 1017 case Bytecodes::_dup: inputs = 1; break; | |
| 1018 case Bytecodes::_dup_x1: inputs = 2; break; | |
| 1019 case Bytecodes::_dup_x2: inputs = 3; break; | |
| 1020 case Bytecodes::_dup2: inputs = 2; break; | |
| 1021 case Bytecodes::_dup2_x1: inputs = 3; break; | |
| 1022 case Bytecodes::_dup2_x2: inputs = 4; break; | |
| 1023 case Bytecodes::_swap: inputs = 2; break; | |
| 1024 case Bytecodes::_arraylength: inputs = 1; break; | |
| 1025 | |
| 1026 case Bytecodes::_getstatic: | |
| 1027 case Bytecodes::_putstatic: | |
| 1028 case Bytecodes::_getfield: | |
| 1029 case Bytecodes::_putfield: | |
| 1030 { | |
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1031 bool ignored_will_link; |
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1032 ciField* field = method()->get_field_at_bci(bci(), ignored_will_link); |
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1033 int size = field->type()->size(); |
| 0 | 1034 bool is_get = (depth >= 0), is_static = (depth & 1); |
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1035 inputs = (is_static ? 0 : 1); |
| 0 | 1036 if (is_get) { |
| 1037 depth = size - inputs; | |
| 1038 } else { | |
| 1039 inputs += size; // putxxx pops the value from the stack | |
| 1040 depth = - inputs; | |
| 1041 } | |
| 1042 } | |
| 1043 break; | |
| 1044 | |
| 1045 case Bytecodes::_invokevirtual: | |
| 1046 case Bytecodes::_invokespecial: | |
| 1047 case Bytecodes::_invokestatic: | |
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1048 case Bytecodes::_invokedynamic: |
| 0 | 1049 case Bytecodes::_invokeinterface: |
| 1050 { | |
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1051 bool ignored_will_link; |
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1052 ciSignature* declared_signature = NULL; |
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1053 ciMethod* ignored_callee = method()->get_method_at_bci(bci(), ignored_will_link, &declared_signature); |
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1054 assert(declared_signature != NULL, "cannot be null"); |
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1055 inputs = declared_signature->arg_size_for_bc(code); |
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1056 int size = declared_signature->return_type()->size(); |
| 0 | 1057 depth = size - inputs; |
| 1058 } | |
| 1059 break; | |
| 1060 | |
| 1061 case Bytecodes::_multianewarray: | |
| 1062 { | |
| 1063 ciBytecodeStream iter(method()); | |
| 1064 iter.reset_to_bci(bci()); | |
| 1065 iter.next(); | |
| 1066 inputs = iter.get_dimensions(); | |
| 1067 assert(rsize == 1, ""); | |
| 1068 depth = rsize - inputs; | |
| 1069 } | |
| 1070 break; | |
| 1071 | |
| 1072 case Bytecodes::_ireturn: | |
| 1073 case Bytecodes::_lreturn: | |
| 1074 case Bytecodes::_freturn: | |
| 1075 case Bytecodes::_dreturn: | |
| 1076 case Bytecodes::_areturn: | |
| 1077 assert(rsize = -depth, ""); | |
| 1078 inputs = rsize; | |
| 1079 break; | |
| 1080 | |
| 1081 case Bytecodes::_jsr: | |
| 1082 case Bytecodes::_jsr_w: | |
| 1083 inputs = 0; | |
| 1084 depth = 1; // S.B. depth=1, not zero | |
| 1085 break; | |
| 1086 | |
| 1087 default: | |
| 1088 // bytecode produces a typed result | |
| 1089 inputs = rsize - depth; | |
| 1090 assert(inputs >= 0, ""); | |
| 1091 break; | |
| 1092 } | |
| 1093 | |
| 1094 #ifdef ASSERT | |
| 1095 // spot check | |
| 1096 int outputs = depth + inputs; | |
| 1097 assert(outputs >= 0, "sanity"); | |
| 1098 switch (code) { | |
| 1099 case Bytecodes::_checkcast: assert(inputs == 1 && outputs == 1, ""); break; | |
| 1100 case Bytecodes::_athrow: assert(inputs == 1 && outputs == 0, ""); break; | |
| 1101 case Bytecodes::_aload_0: assert(inputs == 0 && outputs == 1, ""); break; | |
| 1102 case Bytecodes::_return: assert(inputs == 0 && outputs == 0, ""); break; | |
| 1103 case Bytecodes::_drem: assert(inputs == 4 && outputs == 2, ""); break; | |
| 1104 } | |
| 1105 #endif //ASSERT | |
| 1106 | |
| 1107 return true; | |
| 1108 } | |
| 1109 | |
| 1110 | |
| 1111 | |
| 1112 //------------------------------basic_plus_adr--------------------------------- | |
| 1113 Node* GraphKit::basic_plus_adr(Node* base, Node* ptr, Node* offset) { | |
| 1114 // short-circuit a common case | |
| 1115 if (offset == intcon(0)) return ptr; | |
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1116 return _gvn.transform( new (C) AddPNode(base, ptr, offset) ); |
| 0 | 1117 } |
| 1118 | |
| 1119 Node* GraphKit::ConvI2L(Node* offset) { | |
| 1120 // short-circuit a common case | |
| 1121 jint offset_con = find_int_con(offset, Type::OffsetBot); | |
| 1122 if (offset_con != Type::OffsetBot) { | |
| 6846 | 1123 return longcon((jlong) offset_con); |
| 0 | 1124 } |
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1125 return _gvn.transform( new (C) ConvI2LNode(offset)); |
| 0 | 1126 } |
| 1127 Node* GraphKit::ConvL2I(Node* offset) { | |
| 1128 // short-circuit a common case | |
| 1129 jlong offset_con = find_long_con(offset, (jlong)Type::OffsetBot); | |
| 1130 if (offset_con != (jlong)Type::OffsetBot) { | |
| 1131 return intcon((int) offset_con); | |
| 1132 } | |
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1133 return _gvn.transform( new (C) ConvL2INode(offset)); |
| 0 | 1134 } |
| 1135 | |
| 1136 //-------------------------load_object_klass----------------------------------- | |
| 1137 Node* GraphKit::load_object_klass(Node* obj) { | |
| 1138 // Special-case a fresh allocation to avoid building nodes: | |
| 1139 Node* akls = AllocateNode::Ideal_klass(obj, &_gvn); | |
| 1140 if (akls != NULL) return akls; | |
| 1141 Node* k_adr = basic_plus_adr(obj, oopDesc::klass_offset_in_bytes()); | |
|
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1142 return _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), k_adr, TypeInstPtr::KLASS) ); |
| 0 | 1143 } |
| 1144 | |
| 1145 //-------------------------load_array_length----------------------------------- | |
| 1146 Node* GraphKit::load_array_length(Node* array) { | |
| 1147 // Special-case a fresh allocation to avoid building nodes: | |
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1148 AllocateArrayNode* alloc = AllocateArrayNode::Ideal_array_allocation(array, &_gvn); |
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1149 Node *alen; |
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1150 if (alloc == NULL) { |
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1151 Node *r_adr = basic_plus_adr(array, arrayOopDesc::length_offset_in_bytes()); |
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1152 alen = _gvn.transform( new (C) LoadRangeNode(0, immutable_memory(), r_adr, TypeInt::POS)); |
|
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1153 } else { |
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1154 alen = alloc->Ideal_length(); |
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1155 Node* ccast = alloc->make_ideal_length(_gvn.type(array)->is_oopptr(), &_gvn); |
|
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1156 if (ccast != alen) { |
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1157 alen = _gvn.transform(ccast); |
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1158 } |
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1159 } |
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1160 return alen; |
| 0 | 1161 } |
| 1162 | |
| 1163 //------------------------------do_null_check---------------------------------- | |
| 1164 // Helper function to do a NULL pointer check. Returned value is | |
| 1165 // the incoming address with NULL casted away. You are allowed to use the | |
| 1166 // not-null value only if you are control dependent on the test. | |
| 1167 extern int explicit_null_checks_inserted, | |
| 1168 explicit_null_checks_elided; | |
| 1169 Node* GraphKit::null_check_common(Node* value, BasicType type, | |
| 1170 // optional arguments for variations: | |
| 1171 bool assert_null, | |
| 1172 Node* *null_control) { | |
| 1173 assert(!assert_null || null_control == NULL, "not both at once"); | |
| 1174 if (stopped()) return top(); | |
| 1175 if (!GenerateCompilerNullChecks && !assert_null && null_control == NULL) { | |
| 1176 // For some performance testing, we may wish to suppress null checking. | |
| 1177 value = cast_not_null(value); // Make it appear to be non-null (4962416). | |
| 1178 return value; | |
| 1179 } | |
| 1180 explicit_null_checks_inserted++; | |
| 1181 | |
| 1182 // Construct NULL check | |
| 1183 Node *chk = NULL; | |
| 1184 switch(type) { | |
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1185 case T_LONG : chk = new (C) CmpLNode(value, _gvn.zerocon(T_LONG)); break; |
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1186 case T_INT : chk = new (C) CmpINode(value, _gvn.intcon(0)); break; |
| 0 | 1187 case T_ARRAY : // fall through |
| 1188 type = T_OBJECT; // simplify further tests | |
| 1189 case T_OBJECT : { | |
| 1190 const Type *t = _gvn.type( value ); | |
| 1191 | |
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1192 const TypeOopPtr* tp = t->isa_oopptr(); |
| 955 | 1193 if (tp != NULL && tp->klass() != NULL && !tp->klass()->is_loaded() |
| 0 | 1194 // Only for do_null_check, not any of its siblings: |
| 1195 && !assert_null && null_control == NULL) { | |
| 1196 // Usually, any field access or invocation on an unloaded oop type | |
| 1197 // will simply fail to link, since the statically linked class is | |
| 1198 // likely also to be unloaded. However, in -Xcomp mode, sometimes | |
| 1199 // the static class is loaded but the sharper oop type is not. | |
| 1200 // Rather than checking for this obscure case in lots of places, | |
| 1201 // we simply observe that a null check on an unloaded class | |
| 1202 // will always be followed by a nonsense operation, so we | |
| 1203 // can just issue the uncommon trap here. | |
| 1204 // Our access to the unloaded class will only be correct | |
| 1205 // after it has been loaded and initialized, which requires | |
| 1206 // a trip through the interpreter. | |
| 1207 #ifndef PRODUCT | |
| 1208 if (WizardMode) { tty->print("Null check of unloaded "); tp->klass()->print(); tty->cr(); } | |
| 1209 #endif | |
| 1210 uncommon_trap(Deoptimization::Reason_unloaded, | |
| 1211 Deoptimization::Action_reinterpret, | |
| 1212 tp->klass(), "!loaded"); | |
| 1213 return top(); | |
| 1214 } | |
| 1215 | |
| 1216 if (assert_null) { | |
| 1217 // See if the type is contained in NULL_PTR. | |
| 1218 // If so, then the value is already null. | |
| 1219 if (t->higher_equal(TypePtr::NULL_PTR)) { | |
| 1220 explicit_null_checks_elided++; | |
| 1221 return value; // Elided null assert quickly! | |
| 1222 } | |
| 1223 } else { | |
| 1224 // See if mixing in the NULL pointer changes type. | |
| 1225 // If so, then the NULL pointer was not allowed in the original | |
| 1226 // type. In other words, "value" was not-null. | |
|
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1227 if (t->meet(TypePtr::NULL_PTR) != t->remove_speculative()) { |
| 0 | 1228 // same as: if (!TypePtr::NULL_PTR->higher_equal(t)) ... |
| 1229 explicit_null_checks_elided++; | |
| 1230 return value; // Elided null check quickly! | |
| 1231 } | |
| 1232 } | |
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1233 chk = new (C) CmpPNode( value, null() ); |
| 0 | 1234 break; |
| 1235 } | |
| 1236 | |
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1237 default: |
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1238 fatal(err_msg_res("unexpected type: %s", type2name(type))); |
| 0 | 1239 } |
| 1240 assert(chk != NULL, "sanity check"); | |
| 1241 chk = _gvn.transform(chk); | |
| 1242 | |
| 1243 BoolTest::mask btest = assert_null ? BoolTest::eq : BoolTest::ne; | |
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1244 BoolNode *btst = new (C) BoolNode( chk, btest); |
| 0 | 1245 Node *tst = _gvn.transform( btst ); |
| 1246 | |
| 1247 //----------- | |
| 605 | 1248 // if peephole optimizations occurred, a prior test existed. |
| 0 | 1249 // If a prior test existed, maybe it dominates as we can avoid this test. |
| 1250 if (tst != btst && type == T_OBJECT) { | |
| 1251 // At this point we want to scan up the CFG to see if we can | |
| 1252 // find an identical test (and so avoid this test altogether). | |
| 1253 Node *cfg = control(); | |
| 1254 int depth = 0; | |
| 1255 while( depth < 16 ) { // Limit search depth for speed | |
| 1256 if( cfg->Opcode() == Op_IfTrue && | |
| 1257 cfg->in(0)->in(1) == tst ) { | |
| 1258 // Found prior test. Use "cast_not_null" to construct an identical | |
| 1259 // CastPP (and hence hash to) as already exists for the prior test. | |
| 1260 // Return that casted value. | |
| 1261 if (assert_null) { | |
| 1262 replace_in_map(value, null()); | |
| 1263 return null(); // do not issue the redundant test | |
| 1264 } | |
| 1265 Node *oldcontrol = control(); | |
| 1266 set_control(cfg); | |
| 1267 Node *res = cast_not_null(value); | |
| 1268 set_control(oldcontrol); | |
| 1269 explicit_null_checks_elided++; | |
| 1270 return res; | |
| 1271 } | |
| 1272 cfg = IfNode::up_one_dom(cfg, /*linear_only=*/ true); | |
| 1273 if (cfg == NULL) break; // Quit at region nodes | |
| 1274 depth++; | |
| 1275 } | |
| 1276 } | |
| 1277 | |
| 1278 //----------- | |
| 1279 // Branch to failure if null | |
| 1280 float ok_prob = PROB_MAX; // a priori estimate: nulls never happen | |
| 1281 Deoptimization::DeoptReason reason; | |
| 1282 if (assert_null) | |
| 1283 reason = Deoptimization::Reason_null_assert; | |
| 1284 else if (type == T_OBJECT) | |
| 1285 reason = Deoptimization::Reason_null_check; | |
| 1286 else | |
| 1287 reason = Deoptimization::Reason_div0_check; | |
| 1288 | |
|
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1289 // %%% Since Reason_unhandled is not recorded on a per-bytecode basis, |
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1290 // ciMethodData::has_trap_at will return a conservative -1 if any |
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1291 // must-be-null assertion has failed. This could cause performance |
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1292 // problems for a method after its first do_null_assert failure. |
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1293 // Consider using 'Reason_class_check' instead? |
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1294 |
| 0 | 1295 // To cause an implicit null check, we set the not-null probability |
| 605 | 1296 // to the maximum (PROB_MAX). For an explicit check the probability |
| 0 | 1297 // is set to a smaller value. |
| 1298 if (null_control != NULL || too_many_traps(reason)) { | |
| 1299 // probability is less likely | |
| 1300 ok_prob = PROB_LIKELY_MAG(3); | |
| 1301 } else if (!assert_null && | |
| 1302 (ImplicitNullCheckThreshold > 0) && | |
| 1303 method() != NULL && | |
| 1304 (method()->method_data()->trap_count(reason) | |
| 1305 >= (uint)ImplicitNullCheckThreshold)) { | |
| 1306 ok_prob = PROB_LIKELY_MAG(3); | |
| 1307 } | |
| 1308 | |
| 1309 if (null_control != NULL) { | |
| 1310 IfNode* iff = create_and_map_if(control(), tst, ok_prob, COUNT_UNKNOWN); | |
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1311 Node* null_true = _gvn.transform( new (C) IfFalseNode(iff)); |
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1312 set_control( _gvn.transform( new (C) IfTrueNode(iff))); |
| 0 | 1313 if (null_true == top()) |
| 1314 explicit_null_checks_elided++; | |
| 1315 (*null_control) = null_true; | |
| 1316 } else { | |
| 1317 BuildCutout unless(this, tst, ok_prob); | |
| 1318 // Check for optimizer eliding test at parse time | |
| 1319 if (stopped()) { | |
| 1320 // Failure not possible; do not bother making uncommon trap. | |
| 1321 explicit_null_checks_elided++; | |
| 1322 } else if (assert_null) { | |
| 1323 uncommon_trap(reason, | |
| 1324 Deoptimization::Action_make_not_entrant, | |
| 1325 NULL, "assert_null"); | |
| 1326 } else { | |
| 332 | 1327 replace_in_map(value, zerocon(type)); |
| 0 | 1328 builtin_throw(reason); |
| 1329 } | |
| 1330 } | |
| 1331 | |
| 1332 // Must throw exception, fall-thru not possible? | |
| 1333 if (stopped()) { | |
| 1334 return top(); // No result | |
| 1335 } | |
| 1336 | |
| 1337 if (assert_null) { | |
| 1338 // Cast obj to null on this path. | |
| 1339 replace_in_map(value, zerocon(type)); | |
| 1340 return zerocon(type); | |
| 1341 } | |
| 1342 | |
| 1343 // Cast obj to not-null on this path, if there is no null_control. | |
| 1344 // (If there is a null_control, a non-null value may come back to haunt us.) | |
| 1345 if (type == T_OBJECT) { | |
| 1346 Node* cast = cast_not_null(value, false); | |
| 1347 if (null_control == NULL || (*null_control) == top()) | |
| 1348 replace_in_map(value, cast); | |
| 1349 value = cast; | |
| 1350 } | |
| 1351 | |
| 1352 return value; | |
| 1353 } | |
| 1354 | |
| 1355 | |
| 1356 //------------------------------cast_not_null---------------------------------- | |
| 1357 // Cast obj to not-null on this path | |
| 1358 Node* GraphKit::cast_not_null(Node* obj, bool do_replace_in_map) { | |
| 1359 const Type *t = _gvn.type(obj); | |
|
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1360 const Type *t_not_null = t->join_speculative(TypePtr::NOTNULL); |
| 0 | 1361 // Object is already not-null? |
| 1362 if( t == t_not_null ) return obj; | |
| 1363 | |
|
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1364 Node *cast = new (C) CastPPNode(obj,t_not_null); |
| 0 | 1365 cast->init_req(0, control()); |
| 1366 cast = _gvn.transform( cast ); | |
| 1367 | |
| 1368 // Scan for instances of 'obj' in the current JVM mapping. | |
| 1369 // These instances are known to be not-null after the test. | |
| 1370 if (do_replace_in_map) | |
| 1371 replace_in_map(obj, cast); | |
| 1372 | |
| 1373 return cast; // Return casted value | |
| 1374 } | |
| 1375 | |
| 1376 | |
| 1377 //--------------------------replace_in_map------------------------------------- | |
| 1378 void GraphKit::replace_in_map(Node* old, Node* neww) { | |
|
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|
1379 if (old == neww) { |
|
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|
1380 return; |
|
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|
1381 } |
|
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|
1382 |
|
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|
1383 map()->replace_edge(old, neww); |
| 0 | 1384 |
| 1385 // Note: This operation potentially replaces any edge | |
| 1386 // on the map. This includes locals, stack, and monitors | |
| 1387 // of the current (innermost) JVM state. | |
| 1388 | |
|
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1389 if (!ReplaceInParentMaps) { |
|
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|
1390 return; |
|
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|
1391 } |
|
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|
1392 |
|
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1393 // PreserveJVMState doesn't do a deep copy so we can't modify |
|
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1394 // parents |
|
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1395 if (Compile::current()->has_preserve_jvm_state()) { |
|
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|
1396 return; |
|
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|
1397 } |
|
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|
1398 |
|
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|
1399 Parse* parser = is_Parse(); |
|
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|
1400 bool progress = true; |
|
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|
1401 Node* ctrl = map()->in(0); |
|
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1402 // Follow the chain of parsers and see whether the update can be |
|
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1403 // done in the map of callers. We can do the replace for a caller if |
|
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1404 // the current control post dominates the control of a caller. |
|
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1405 while (parser != NULL && parser->caller() != NULL && progress) { |
|
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|
1406 progress = false; |
|
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|
1407 Node* parent_map = parser->caller()->map(); |
|
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1408 assert(parser->exits().map()->jvms()->depth() == parser->caller()->depth(), "map mismatch"); |
|
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1409 |
|
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1410 Node* parent_ctrl = parent_map->in(0); |
|
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|
1411 |
|
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|
1412 while (parent_ctrl->is_Region()) { |
|
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1413 Node* n = parent_ctrl->as_Region()->is_copy(); |
|
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1414 if (n == NULL) { |
|
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|
1415 break; |
|
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|
1416 } |
|
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|
1417 parent_ctrl = n; |
|
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|
1418 } |
|
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|
1419 |
|
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|
1420 for (;;) { |
|
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|
1421 if (ctrl == parent_ctrl) { |
|
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1422 // update the map of the exits which is the one that will be |
|
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1423 // used when compilation resume after inlining |
|
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1424 parser->exits().map()->replace_edge(old, neww); |
|
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|
1425 progress = true; |
|
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|
1426 break; |
|
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|
1427 } |
|
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|
1428 if (ctrl->is_Proj() && ctrl->as_Proj()->is_uncommon_trap_if_pattern(Deoptimization::Reason_none)) { |
|
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|
1429 ctrl = ctrl->in(0)->in(0); |
|
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1430 } else if (ctrl->is_Region()) { |
|
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|
1431 Node* n = ctrl->as_Region()->is_copy(); |
|
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|
1432 if (n == NULL) { |
|
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|
1433 break; |
|
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|
1434 } |
|
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|
1435 ctrl = n; |
|
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|
1436 } else { |
|
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|
1437 break; |
|
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|
1438 } |
|
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|
1439 } |
|
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|
1440 |
|
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|
1441 parser = parser->parent_parser(); |
|
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|
1442 } |
| 0 | 1443 } |
| 1444 | |
| 1445 | |
| 1446 //============================================================================= | |
| 1447 //--------------------------------memory--------------------------------------- | |
| 1448 Node* GraphKit::memory(uint alias_idx) { | |
| 1449 MergeMemNode* mem = merged_memory(); | |
| 1450 Node* p = mem->memory_at(alias_idx); | |
| 1451 _gvn.set_type(p, Type::MEMORY); // must be mapped | |
| 1452 return p; | |
| 1453 } | |
| 1454 | |
| 1455 //-----------------------------reset_memory------------------------------------ | |
| 1456 Node* GraphKit::reset_memory() { | |
| 1457 Node* mem = map()->memory(); | |
| 1458 // do not use this node for any more parsing! | |
| 1459 debug_only( map()->set_memory((Node*)NULL) ); | |
| 1460 return _gvn.transform( mem ); | |
| 1461 } | |
| 1462 | |
| 1463 //------------------------------set_all_memory--------------------------------- | |
| 1464 void GraphKit::set_all_memory(Node* newmem) { | |
| 1465 Node* mergemem = MergeMemNode::make(C, newmem); | |
| 1466 gvn().set_type_bottom(mergemem); | |
| 1467 map()->set_memory(mergemem); | |
| 1468 } | |
| 1469 | |
| 1470 //------------------------------set_all_memory_call---------------------------- | |
|
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|
1471 void GraphKit::set_all_memory_call(Node* call, bool separate_io_proj) { |
|
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1472 Node* newmem = _gvn.transform( new (C) ProjNode(call, TypeFunc::Memory, separate_io_proj) ); |
| 0 | 1473 set_all_memory(newmem); |
| 1474 } | |
| 1475 | |
| 1476 //============================================================================= | |
| 1477 // | |
| 1478 // parser factory methods for MemNodes | |
| 1479 // | |
| 1480 // These are layered on top of the factory methods in LoadNode and StoreNode, | |
| 1481 // and integrate with the parser's memory state and _gvn engine. | |
| 1482 // | |
| 1483 | |
| 1484 // factory methods in "int adr_idx" | |
| 1485 Node* GraphKit::make_load(Node* ctl, Node* adr, const Type* t, BasicType bt, | |
| 1486 int adr_idx, | |
| 1487 bool require_atomic_access) { | |
| 1488 assert(adr_idx != Compile::AliasIdxTop, "use other make_load factory" ); | |
| 1489 const TypePtr* adr_type = NULL; // debug-mode-only argument | |
| 1490 debug_only(adr_type = C->get_adr_type(adr_idx)); | |
| 1491 Node* mem = memory(adr_idx); | |
| 1492 Node* ld; | |
| 1493 if (require_atomic_access && bt == T_LONG) { | |
| 1494 ld = LoadLNode::make_atomic(C, ctl, mem, adr, adr_type, t); | |
| 1495 } else { | |
|
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1496 ld = LoadNode::make(_gvn, ctl, mem, adr, adr_type, t, bt); |
| 0 | 1497 } |
| 10278 | 1498 ld = _gvn.transform(ld); |
| 1499 if ((bt == T_OBJECT) && C->do_escape_analysis() || C->eliminate_boxing()) { | |
| 1500 // Improve graph before escape analysis and boxing elimination. | |
| 1501 record_for_igvn(ld); | |
| 1502 } | |
| 1503 return ld; | |
| 0 | 1504 } |
| 1505 | |
| 1506 Node* GraphKit::store_to_memory(Node* ctl, Node* adr, Node *val, BasicType bt, | |
| 1507 int adr_idx, | |
| 1508 bool require_atomic_access) { | |
| 1509 assert(adr_idx != Compile::AliasIdxTop, "use other store_to_memory factory" ); | |
| 1510 const TypePtr* adr_type = NULL; | |
| 1511 debug_only(adr_type = C->get_adr_type(adr_idx)); | |
| 1512 Node *mem = memory(adr_idx); | |
| 1513 Node* st; | |
| 1514 if (require_atomic_access && bt == T_LONG) { | |
| 1515 st = StoreLNode::make_atomic(C, ctl, mem, adr, adr_type, val); | |
| 1516 } else { | |
|
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1517 st = StoreNode::make(_gvn, ctl, mem, adr, adr_type, val, bt); |
| 0 | 1518 } |
| 1519 st = _gvn.transform(st); | |
| 1520 set_memory(st, adr_idx); | |
| 1521 // Back-to-back stores can only remove intermediate store with DU info | |
| 1522 // so push on worklist for optimizer. | |
| 1523 if (mem->req() > MemNode::Address && adr == mem->in(MemNode::Address)) | |
| 1524 record_for_igvn(st); | |
| 1525 | |
| 1526 return st; | |
| 1527 } | |
| 1528 | |
|
851
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1529 |
|
3249
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|
1530 void GraphKit::pre_barrier(bool do_load, |
|
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|
1531 Node* ctl, |
| 0 | 1532 Node* obj, |
| 1533 Node* adr, | |
|
851
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|
1534 uint adr_idx, |
|
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|
1535 Node* val, |
| 825 | 1536 const TypeOopPtr* val_type, |
|
3249
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|
1537 Node* pre_val, |
| 0 | 1538 BasicType bt) { |
|
3249
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|
1539 |
| 0 | 1540 BarrierSet* bs = Universe::heap()->barrier_set(); |
| 1541 set_control(ctl); | |
| 1542 switch (bs->kind()) { | |
|
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1543 case BarrierSet::G1SATBCT: |
|
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1544 case BarrierSet::G1SATBCTLogging: |
|
3249
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1545 g1_write_barrier_pre(do_load, obj, adr, adr_idx, val, val_type, pre_val, bt); |
|
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|
1546 break; |
| 0 | 1547 |
| 1548 case BarrierSet::CardTableModRef: | |
| 1549 case BarrierSet::CardTableExtension: | |
| 1550 case BarrierSet::ModRef: | |
| 1551 break; | |
| 1552 | |
| 1553 case BarrierSet::Other: | |
| 1554 default : | |
| 1555 ShouldNotReachHere(); | |
| 1556 | |
| 1557 } | |
| 1558 } | |
| 1559 | |
|
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|
1560 bool GraphKit::can_move_pre_barrier() const { |
|
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|
1561 BarrierSet* bs = Universe::heap()->barrier_set(); |
|
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|
1562 switch (bs->kind()) { |
|
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|
1563 case BarrierSet::G1SATBCT: |
|
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|
1564 case BarrierSet::G1SATBCTLogging: |
|
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|
1565 return true; // Can move it if no safepoint |
|
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|
1566 |
|
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|
1567 case BarrierSet::CardTableModRef: |
|
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|
1568 case BarrierSet::CardTableExtension: |
|
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|
1569 case BarrierSet::ModRef: |
|
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|
1570 return true; // There is no pre-barrier |
|
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1571 |
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1572 case BarrierSet::Other: |
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1573 default : |
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1574 ShouldNotReachHere(); |
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1575 } |
|
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1576 return false; |
|
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1577 } |
|
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1578 |
| 0 | 1579 void GraphKit::post_barrier(Node* ctl, |
| 1580 Node* store, | |
| 1581 Node* obj, | |
| 1582 Node* adr, | |
|
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1583 uint adr_idx, |
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1584 Node* val, |
| 0 | 1585 BasicType bt, |
| 1586 bool use_precise) { | |
| 1587 BarrierSet* bs = Universe::heap()->barrier_set(); | |
| 1588 set_control(ctl); | |
| 1589 switch (bs->kind()) { | |
|
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1590 case BarrierSet::G1SATBCT: |
|
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1591 case BarrierSet::G1SATBCTLogging: |
|
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1592 g1_write_barrier_post(store, obj, adr, adr_idx, val, bt, use_precise); |
|
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1593 break; |
| 0 | 1594 |
| 1595 case BarrierSet::CardTableModRef: | |
| 1596 case BarrierSet::CardTableExtension: | |
|
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1597 write_barrier_post(store, obj, adr, adr_idx, val, use_precise); |
| 0 | 1598 break; |
| 1599 | |
| 1600 case BarrierSet::ModRef: | |
| 1601 break; | |
| 1602 | |
| 1603 case BarrierSet::Other: | |
| 1604 default : | |
| 1605 ShouldNotReachHere(); | |
| 1606 | |
| 1607 } | |
| 1608 } | |
| 1609 | |
|
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1610 Node* GraphKit::store_oop(Node* ctl, |
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1611 Node* obj, |
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1612 Node* adr, |
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1613 const TypePtr* adr_type, |
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1614 Node* val, |
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1615 const TypeOopPtr* val_type, |
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1616 BasicType bt, |
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1617 bool use_precise) { |
|
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1618 // Transformation of a value which could be NULL pointer (CastPP #NULL) |
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1619 // could be delayed during Parse (for example, in adjust_map_after_if()). |
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1620 // Execute transformation here to avoid barrier generation in such case. |
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1621 if (_gvn.type(val) == TypePtr::NULL_PTR) |
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1622 val = _gvn.makecon(TypePtr::NULL_PTR); |
|
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1623 |
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1624 set_control(ctl); |
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1625 if (stopped()) return top(); // Dead path ? |
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1626 |
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1627 assert(bt == T_OBJECT, "sanity"); |
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1628 assert(val != NULL, "not dead path"); |
| 0 | 1629 uint adr_idx = C->get_alias_index(adr_type); |
|
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1630 assert(adr_idx != Compile::AliasIdxTop, "use other store_to_memory factory" ); |
|
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1631 |
|
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|
1632 pre_barrier(true /* do_load */, |
|
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1633 control(), obj, adr, adr_idx, val, val_type, |
|
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1634 NULL /* pre_val */, |
|
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1635 bt); |
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1636 |
|
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1637 Node* store = store_to_memory(control(), adr, val, bt, adr_idx); |
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1638 post_barrier(control(), store, obj, adr, adr_idx, val, bt, use_precise); |
| 0 | 1639 return store; |
| 1640 } | |
| 1641 | |
|
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1642 // Could be an array or object we don't know at compile time (unsafe ref.) |
| 0 | 1643 Node* GraphKit::store_oop_to_unknown(Node* ctl, |
|
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1644 Node* obj, // containing obj |
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1645 Node* adr, // actual adress to store val at |
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1646 const TypePtr* adr_type, |
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1647 Node* val, |
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1648 BasicType bt) { |
| 825 | 1649 Compile::AliasType* at = C->alias_type(adr_type); |
| 1650 const TypeOopPtr* val_type = NULL; | |
| 1651 if (adr_type->isa_instptr()) { | |
| 1652 if (at->field() != NULL) { | |
| 1653 // known field. This code is a copy of the do_put_xxx logic. | |
| 1654 ciField* field = at->field(); | |
| 1655 if (!field->type()->is_loaded()) { | |
| 1656 val_type = TypeInstPtr::BOTTOM; | |
| 1657 } else { | |
| 1658 val_type = TypeOopPtr::make_from_klass(field->type()->as_klass()); | |
| 1659 } | |
| 1660 } | |
| 1661 } else if (adr_type->isa_aryptr()) { | |
|
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|
1662 val_type = adr_type->is_aryptr()->elem()->make_oopptr(); |
| 825 | 1663 } |
| 1664 if (val_type == NULL) { | |
| 1665 val_type = TypeInstPtr::BOTTOM; | |
| 1666 } | |
|
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1667 return store_oop(ctl, obj, adr, adr_type, val, val_type, bt, true); |
| 0 | 1668 } |
| 1669 | |
| 1670 | |
| 1671 //-------------------------array_element_address------------------------- | |
| 1672 Node* GraphKit::array_element_address(Node* ary, Node* idx, BasicType elembt, | |
| 1673 const TypeInt* sizetype) { | |
|
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1674 uint shift = exact_log2(type2aelembytes(elembt)); |
| 0 | 1675 uint header = arrayOopDesc::base_offset_in_bytes(elembt); |
| 1676 | |
| 1677 // short-circuit a common case (saves lots of confusing waste motion) | |
| 1678 jint idx_con = find_int_con(idx, -1); | |
| 1679 if (idx_con >= 0) { | |
| 1680 intptr_t offset = header + ((intptr_t)idx_con << shift); | |
| 1681 return basic_plus_adr(ary, offset); | |
| 1682 } | |
| 1683 | |
| 1684 // must be correct type for alignment purposes | |
| 1685 Node* base = basic_plus_adr(ary, header); | |
| 1686 #ifdef _LP64 | |
| 1687 // The scaled index operand to AddP must be a clean 64-bit value. | |
| 1688 // Java allows a 32-bit int to be incremented to a negative | |
| 1689 // value, which appears in a 64-bit register as a large | |
| 1690 // positive number. Using that large positive number as an | |
| 1691 // operand in pointer arithmetic has bad consequences. | |
| 1692 // On the other hand, 32-bit overflow is rare, and the possibility | |
| 1693 // can often be excluded, if we annotate the ConvI2L node with | |
| 1694 // a type assertion that its value is known to be a small positive | |
| 1695 // number. (The prior range check has ensured this.) | |
| 1696 // This assertion is used by ConvI2LNode::Ideal. | |
| 1697 int index_max = max_jint - 1; // array size is max_jint, index is one less | |
| 1698 if (sizetype != NULL) index_max = sizetype->_hi - 1; | |
| 1699 const TypeLong* lidxtype = TypeLong::make(CONST64(0), index_max, Type::WidenMax); | |
|
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1700 idx = _gvn.transform( new (C) ConvI2LNode(idx, lidxtype) ); |
| 0 | 1701 #endif |
|
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1702 Node* scale = _gvn.transform( new (C) LShiftXNode(idx, intcon(shift)) ); |
| 0 | 1703 return basic_plus_adr(ary, base, scale); |
| 1704 } | |
| 1705 | |
| 1706 //-------------------------load_array_element------------------------- | |
| 1707 Node* GraphKit::load_array_element(Node* ctl, Node* ary, Node* idx, const TypeAryPtr* arytype) { | |
| 1708 const Type* elemtype = arytype->elem(); | |
| 1709 BasicType elembt = elemtype->array_element_basic_type(); | |
| 1710 Node* adr = array_element_address(ary, idx, elembt, arytype->size()); | |
| 1711 Node* ld = make_load(ctl, adr, elemtype, elembt, arytype); | |
| 1712 return ld; | |
| 1713 } | |
| 1714 | |
| 1715 //-------------------------set_arguments_for_java_call------------------------- | |
| 1716 // Arguments (pre-popped from the stack) are taken from the JVMS. | |
| 1717 void GraphKit::set_arguments_for_java_call(CallJavaNode* call) { | |
| 1718 // Add the call arguments: | |
| 1719 uint nargs = call->method()->arg_size(); | |
| 1720 for (uint i = 0; i < nargs; i++) { | |
| 1721 Node* arg = argument(i); | |
| 1722 call->init_req(i + TypeFunc::Parms, arg); | |
| 1723 } | |
| 1724 } | |
| 1725 | |
| 1726 //---------------------------set_edges_for_java_call--------------------------- | |
| 1727 // Connect a newly created call into the current JVMS. | |
| 1728 // A return value node (if any) is returned from set_edges_for_java_call. | |
|
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1729 void GraphKit::set_edges_for_java_call(CallJavaNode* call, bool must_throw, bool separate_io_proj) { |
| 0 | 1730 |
| 1731 // Add the predefined inputs: | |
| 1732 call->init_req( TypeFunc::Control, control() ); | |
| 1733 call->init_req( TypeFunc::I_O , i_o() ); | |
| 1734 call->init_req( TypeFunc::Memory , reset_memory() ); | |
| 1735 call->init_req( TypeFunc::FramePtr, frameptr() ); | |
| 1736 call->init_req( TypeFunc::ReturnAdr, top() ); | |
| 1737 | |
| 1738 add_safepoint_edges(call, must_throw); | |
| 1739 | |
| 1740 Node* xcall = _gvn.transform(call); | |
| 1741 | |
| 1742 if (xcall == top()) { | |
| 1743 set_control(top()); | |
| 1744 return; | |
| 1745 } | |
| 1746 assert(xcall == call, "call identity is stable"); | |
| 1747 | |
| 1748 // Re-use the current map to produce the result. | |
| 1749 | |
|
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1750 set_control(_gvn.transform(new (C) ProjNode(call, TypeFunc::Control))); |
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1751 set_i_o( _gvn.transform(new (C) ProjNode(call, TypeFunc::I_O , separate_io_proj))); |
|
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1752 set_all_memory_call(xcall, separate_io_proj); |
| 0 | 1753 |
| 1754 //return xcall; // no need, caller already has it | |
| 1755 } | |
| 1756 | |
|
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1757 Node* GraphKit::set_results_for_java_call(CallJavaNode* call, bool separate_io_proj) { |
| 0 | 1758 if (stopped()) return top(); // maybe the call folded up? |
| 1759 | |
| 1760 // Capture the return value, if any. | |
| 1761 Node* ret; | |
| 1762 if (call->method() == NULL || | |
| 1763 call->method()->return_type()->basic_type() == T_VOID) | |
| 1764 ret = top(); | |
|
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1765 else ret = _gvn.transform(new (C) ProjNode(call, TypeFunc::Parms)); |
| 0 | 1766 |
| 1767 // Note: Since any out-of-line call can produce an exception, | |
| 1768 // we always insert an I_O projection from the call into the result. | |
| 1769 | |
|
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1770 make_slow_call_ex(call, env()->Throwable_klass(), separate_io_proj); |
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1771 |
|
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1772 if (separate_io_proj) { |
|
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1773 // The caller requested separate projections be used by the fall |
|
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1774 // through and exceptional paths, so replace the projections for |
|
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1775 // the fall through path. |
|
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1776 set_i_o(_gvn.transform( new (C) ProjNode(call, TypeFunc::I_O) )); |
|
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1777 set_all_memory(_gvn.transform( new (C) ProjNode(call, TypeFunc::Memory) )); |
|
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1778 } |
| 0 | 1779 return ret; |
| 1780 } | |
| 1781 | |
| 1782 //--------------------set_predefined_input_for_runtime_call-------------------- | |
| 1783 // Reading and setting the memory state is way conservative here. | |
| 1784 // The real problem is that I am not doing real Type analysis on memory, | |
| 1785 // so I cannot distinguish card mark stores from other stores. Across a GC | |
| 1786 // point the Store Barrier and the card mark memory has to agree. I cannot | |
| 1787 // have a card mark store and its barrier split across the GC point from | |
| 1788 // either above or below. Here I get that to happen by reading ALL of memory. | |
| 1789 // A better answer would be to separate out card marks from other memory. | |
| 1790 // For now, return the input memory state, so that it can be reused | |
| 1791 // after the call, if this call has restricted memory effects. | |
| 1792 Node* GraphKit::set_predefined_input_for_runtime_call(SafePointNode* call) { | |
| 1793 // Set fixed predefined input arguments | |
| 1794 Node* memory = reset_memory(); | |
| 1795 call->init_req( TypeFunc::Control, control() ); | |
| 1796 call->init_req( TypeFunc::I_O, top() ); // does no i/o | |
| 1797 call->init_req( TypeFunc::Memory, memory ); // may gc ptrs | |
| 1798 call->init_req( TypeFunc::FramePtr, frameptr() ); | |
| 1799 call->init_req( TypeFunc::ReturnAdr, top() ); | |
| 1800 return memory; | |
| 1801 } | |
| 1802 | |
| 1803 //-------------------set_predefined_output_for_runtime_call-------------------- | |
| 1804 // Set control and memory (not i_o) from the call. | |
| 1805 // If keep_mem is not NULL, use it for the output state, | |
| 1806 // except for the RawPtr output of the call, if hook_mem is TypeRawPtr::BOTTOM. | |
| 1807 // If hook_mem is NULL, this call produces no memory effects at all. | |
| 1808 // If hook_mem is a Java-visible memory slice (such as arraycopy operands), | |
| 1809 // then only that memory slice is taken from the call. | |
| 1810 // In the last case, we must put an appropriate memory barrier before | |
| 1811 // the call, so as to create the correct anti-dependencies on loads | |
| 1812 // preceding the call. | |
| 1813 void GraphKit::set_predefined_output_for_runtime_call(Node* call, | |
| 1814 Node* keep_mem, | |
| 1815 const TypePtr* hook_mem) { | |
| 1816 // no i/o | |
|
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1817 set_control(_gvn.transform( new (C) ProjNode(call,TypeFunc::Control) )); |
| 0 | 1818 if (keep_mem) { |
| 1819 // First clone the existing memory state | |
| 1820 set_all_memory(keep_mem); | |
| 1821 if (hook_mem != NULL) { | |
| 1822 // Make memory for the call | |
|
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1823 Node* mem = _gvn.transform( new (C) ProjNode(call, TypeFunc::Memory) ); |
| 0 | 1824 // Set the RawPtr memory state only. This covers all the heap top/GC stuff |
| 1825 // We also use hook_mem to extract specific effects from arraycopy stubs. | |
| 1826 set_memory(mem, hook_mem); | |
| 1827 } | |
| 1828 // ...else the call has NO memory effects. | |
| 1829 | |
| 1830 // Make sure the call advertises its memory effects precisely. | |
| 1831 // This lets us build accurate anti-dependences in gcm.cpp. | |
| 1832 assert(C->alias_type(call->adr_type()) == C->alias_type(hook_mem), | |
| 1833 "call node must be constructed correctly"); | |
| 1834 } else { | |
| 1835 assert(hook_mem == NULL, ""); | |
| 1836 // This is not a "slow path" call; all memory comes from the call. | |
| 1837 set_all_memory_call(call); | |
| 1838 } | |
| 1839 } | |
| 1840 | |
|
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1841 |
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1842 // Replace the call with the current state of the kit. |
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1843 void GraphKit::replace_call(CallNode* call, Node* result) { |
|
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1844 JVMState* ejvms = NULL; |
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1845 if (has_exceptions()) { |
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1846 ejvms = transfer_exceptions_into_jvms(); |
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1847 } |
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1848 |
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1849 SafePointNode* final_state = stop(); |
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1850 |
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1851 // Find all the needed outputs of this call |
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1852 CallProjections callprojs; |
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1853 call->extract_projections(&callprojs, true); |
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1854 |
|
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1855 Node* init_mem = call->in(TypeFunc::Memory); |
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1856 Node* final_mem = final_state->in(TypeFunc::Memory); |
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1857 Node* final_ctl = final_state->in(TypeFunc::Control); |
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1858 Node* final_io = final_state->in(TypeFunc::I_O); |
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1859 |
|
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1860 // Replace all the old call edges with the edges from the inlining result |
|
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1861 if (callprojs.fallthrough_catchproj != NULL) { |
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1862 C->gvn_replace_by(callprojs.fallthrough_catchproj, final_ctl); |
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1863 } |
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1864 if (callprojs.fallthrough_memproj != NULL) { |
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1865 C->gvn_replace_by(callprojs.fallthrough_memproj, final_mem); |
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1866 } |
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1867 if (callprojs.fallthrough_ioproj != NULL) { |
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1868 C->gvn_replace_by(callprojs.fallthrough_ioproj, final_io); |
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1869 } |
|
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1870 |
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1871 // Replace the result with the new result if it exists and is used |
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1872 if (callprojs.resproj != NULL && result != NULL) { |
|
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1873 C->gvn_replace_by(callprojs.resproj, result); |
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1874 } |
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1875 |
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1876 if (ejvms == NULL) { |
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1877 // No exception edges to simply kill off those paths |
| 7473 | 1878 if (callprojs.catchall_catchproj != NULL) { |
| 1879 C->gvn_replace_by(callprojs.catchall_catchproj, C->top()); | |
| 1880 } | |
| 1881 if (callprojs.catchall_memproj != NULL) { | |
| 1882 C->gvn_replace_by(callprojs.catchall_memproj, C->top()); | |
| 1883 } | |
| 1884 if (callprojs.catchall_ioproj != NULL) { | |
| 1885 C->gvn_replace_by(callprojs.catchall_ioproj, C->top()); | |
| 1886 } | |
|
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1887 // Replace the old exception object with top |
|
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1888 if (callprojs.exobj != NULL) { |
|
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1889 C->gvn_replace_by(callprojs.exobj, C->top()); |
|
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1890 } |
|
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1891 } else { |
|
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1892 GraphKit ekit(ejvms); |
|
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1893 |
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1894 // Load my combined exception state into the kit, with all phis transformed: |
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1895 SafePointNode* ex_map = ekit.combine_and_pop_all_exception_states(); |
|
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1896 |
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1897 Node* ex_oop = ekit.use_exception_state(ex_map); |
| 7473 | 1898 if (callprojs.catchall_catchproj != NULL) { |
| 1899 C->gvn_replace_by(callprojs.catchall_catchproj, ekit.control()); | |
| 1900 } | |
| 1901 if (callprojs.catchall_memproj != NULL) { | |
| 1902 C->gvn_replace_by(callprojs.catchall_memproj, ekit.reset_memory()); | |
| 1903 } | |
| 1904 if (callprojs.catchall_ioproj != NULL) { | |
| 1905 C->gvn_replace_by(callprojs.catchall_ioproj, ekit.i_o()); | |
| 1906 } | |
|
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1907 |
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1908 // Replace the old exception object with the newly created one |
|
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1909 if (callprojs.exobj != NULL) { |
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1910 C->gvn_replace_by(callprojs.exobj, ex_oop); |
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1911 } |
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1912 } |
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1913 |
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1914 // Disconnect the call from the graph |
|
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1915 call->disconnect_inputs(NULL, C); |
|
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1916 C->gvn_replace_by(call, C->top()); |
|
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1917 |
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1918 // Clean up any MergeMems that feed other MergeMems since the |
|
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1919 // optimizer doesn't like that. |
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1920 if (final_mem->is_MergeMem()) { |
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1921 Node_List wl; |
|
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1922 for (SimpleDUIterator i(final_mem); i.has_next(); i.next()) { |
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1923 Node* m = i.get(); |
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1924 if (m->is_MergeMem() && !wl.contains(m)) { |
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1925 wl.push(m); |
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1926 } |
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1927 } |
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1928 while (wl.size() > 0) { |
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1929 _gvn.transform(wl.pop()); |
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1930 } |
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1931 } |
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1932 } |
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1933 |
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1934 |
| 0 | 1935 //------------------------------increment_counter------------------------------ |
| 1936 // for statistics: increment a VM counter by 1 | |
| 1937 | |
| 1938 void GraphKit::increment_counter(address counter_addr) { | |
| 1939 Node* adr1 = makecon(TypeRawPtr::make(counter_addr)); | |
| 1940 increment_counter(adr1); | |
| 1941 } | |
| 1942 | |
| 1943 void GraphKit::increment_counter(Node* counter_addr) { | |
| 1944 int adr_type = Compile::AliasIdxRaw; | |
| 1609 | 1945 Node* ctrl = control(); |
| 1946 Node* cnt = make_load(ctrl, counter_addr, TypeInt::INT, T_INT, adr_type); | |
|
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1947 Node* incr = _gvn.transform(new (C) AddINode(cnt, _gvn.intcon(1))); |
| 1609 | 1948 store_to_memory( ctrl, counter_addr, incr, T_INT, adr_type ); |
| 0 | 1949 } |
| 1950 | |
| 1951 | |
| 1952 //------------------------------uncommon_trap---------------------------------- | |
| 1953 // Bail out to the interpreter in mid-method. Implemented by calling the | |
| 1954 // uncommon_trap blob. This helper function inserts a runtime call with the | |
| 1955 // right debug info. | |
| 1956 void GraphKit::uncommon_trap(int trap_request, | |
| 1957 ciKlass* klass, const char* comment, | |
| 1958 bool must_throw, | |
| 1959 bool keep_exact_action) { | |
| 1960 if (failing()) stop(); | |
| 1961 if (stopped()) return; // trap reachable? | |
| 1962 | |
| 1963 // Note: If ProfileTraps is true, and if a deopt. actually | |
| 1964 // occurs here, the runtime will make sure an MDO exists. There is | |
|
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1965 // no need to call method()->ensure_method_data() at this point. |
| 0 | 1966 |
|
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1967 // Set the stack pointer to the right value for reexecution: |
|
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1968 set_sp(reexecute_sp()); |
|
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1969 |
| 0 | 1970 #ifdef ASSERT |
| 1971 if (!must_throw) { | |
| 1972 // Make sure the stack has at least enough depth to execute | |
| 1973 // the current bytecode. | |
|
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1974 int inputs, ignored_depth; |
|
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1975 if (compute_stack_effects(inputs, ignored_depth)) { |
|
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1976 assert(sp() >= inputs, err_msg_res("must have enough JVMS stack to execute %s: sp=%d, inputs=%d", |
|
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1977 Bytecodes::name(java_bc()), sp(), inputs)); |
| 0 | 1978 } |
| 1979 } | |
| 1980 #endif | |
| 1981 | |
| 1982 Deoptimization::DeoptReason reason = Deoptimization::trap_request_reason(trap_request); | |
| 1983 Deoptimization::DeoptAction action = Deoptimization::trap_request_action(trap_request); | |
| 1984 | |
| 1985 switch (action) { | |
| 1986 case Deoptimization::Action_maybe_recompile: | |
| 1987 case Deoptimization::Action_reinterpret: | |
| 1988 // Temporary fix for 6529811 to allow virtual calls to be sure they | |
| 1989 // get the chance to go from mono->bi->mega | |
| 1990 if (!keep_exact_action && | |
| 1991 Deoptimization::trap_request_index(trap_request) < 0 && | |
| 1992 too_many_recompiles(reason)) { | |
| 1993 // This BCI is causing too many recompilations. | |
| 1994 action = Deoptimization::Action_none; | |
| 1995 trap_request = Deoptimization::make_trap_request(reason, action); | |
| 1996 } else { | |
| 1997 C->set_trap_can_recompile(true); | |
| 1998 } | |
| 1999 break; | |
| 2000 case Deoptimization::Action_make_not_entrant: | |
| 2001 C->set_trap_can_recompile(true); | |
| 2002 break; | |
| 2003 #ifdef ASSERT | |
| 2004 case Deoptimization::Action_none: | |
| 2005 case Deoptimization::Action_make_not_compilable: | |
| 2006 break; | |
| 2007 default: | |
|
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2008 fatal(err_msg_res("unknown action %d: %s", action, Deoptimization::trap_action_name(action))); |
|
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2009 break; |
| 0 | 2010 #endif |
| 2011 } | |
| 2012 | |
| 2013 if (TraceOptoParse) { | |
| 2014 char buf[100]; | |
| 2015 tty->print_cr("Uncommon trap %s at bci:%d", | |
| 2016 Deoptimization::format_trap_request(buf, sizeof(buf), | |
| 2017 trap_request), bci()); | |
| 2018 } | |
| 2019 | |
| 2020 CompileLog* log = C->log(); | |
| 2021 if (log != NULL) { | |
| 2022 int kid = (klass == NULL)? -1: log->identify(klass); | |
| 2023 log->begin_elem("uncommon_trap bci='%d'", bci()); | |
| 2024 char buf[100]; | |
| 2025 log->print(" %s", Deoptimization::format_trap_request(buf, sizeof(buf), | |
| 2026 trap_request)); | |
| 2027 if (kid >= 0) log->print(" klass='%d'", kid); | |
| 2028 if (comment != NULL) log->print(" comment='%s'", comment); | |
| 2029 log->end_elem(); | |
| 2030 } | |
| 2031 | |
| 2032 // Make sure any guarding test views this path as very unlikely | |
| 2033 Node *i0 = control()->in(0); | |
| 2034 if (i0 != NULL && i0->is_If()) { // Found a guarding if test? | |
| 2035 IfNode *iff = i0->as_If(); | |
| 2036 float f = iff->_prob; // Get prob | |
| 2037 if (control()->Opcode() == Op_IfTrue) { | |
| 2038 if (f > PROB_UNLIKELY_MAG(4)) | |
| 2039 iff->_prob = PROB_MIN; | |
| 2040 } else { | |
| 2041 if (f < PROB_LIKELY_MAG(4)) | |
| 2042 iff->_prob = PROB_MAX; | |
| 2043 } | |
| 2044 } | |
| 2045 | |
| 2046 // Clear out dead values from the debug info. | |
| 2047 kill_dead_locals(); | |
| 2048 | |
| 2049 // Now insert the uncommon trap subroutine call | |
| 1748 | 2050 address call_addr = SharedRuntime::uncommon_trap_blob()->entry_point(); |
| 0 | 2051 const TypePtr* no_memory_effects = NULL; |
| 2052 // Pass the index of the class to be loaded | |
| 2053 Node* call = make_runtime_call(RC_NO_LEAF | RC_UNCOMMON | | |
| 2054 (must_throw ? RC_MUST_THROW : 0), | |
| 2055 OptoRuntime::uncommon_trap_Type(), | |
| 2056 call_addr, "uncommon_trap", no_memory_effects, | |
| 2057 intcon(trap_request)); | |
| 2058 assert(call->as_CallStaticJava()->uncommon_trap_request() == trap_request, | |
| 2059 "must extract request correctly from the graph"); | |
| 2060 assert(trap_request != 0, "zero value reserved by uncommon_trap_request"); | |
| 2061 | |
| 2062 call->set_req(TypeFunc::ReturnAdr, returnadr()); | |
| 2063 // The debug info is the only real input to this call. | |
| 2064 | |
| 2065 // Halt-and-catch fire here. The above call should never return! | |
|
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2066 HaltNode* halt = new(C) HaltNode(control(), frameptr()); |
| 0 | 2067 _gvn.set_type_bottom(halt); |
| 2068 root()->add_req(halt); | |
| 2069 | |
| 2070 stop_and_kill_map(); | |
| 2071 } | |
| 2072 | |
| 2073 | |
| 2074 //--------------------------just_allocated_object------------------------------ | |
| 2075 // Report the object that was just allocated. | |
| 2076 // It must be the case that there are no intervening safepoints. | |
| 2077 // We use this to determine if an object is so "fresh" that | |
| 2078 // it does not require card marks. | |
| 2079 Node* GraphKit::just_allocated_object(Node* current_control) { | |
| 2080 if (C->recent_alloc_ctl() == current_control) | |
| 2081 return C->recent_alloc_obj(); | |
| 2082 return NULL; | |
| 2083 } | |
| 2084 | |
| 2085 | |
| 2086 void GraphKit::round_double_arguments(ciMethod* dest_method) { | |
| 2087 // (Note: TypeFunc::make has a cache that makes this fast.) | |
| 2088 const TypeFunc* tf = TypeFunc::make(dest_method); | |
| 2089 int nargs = tf->_domain->_cnt - TypeFunc::Parms; | |
| 2090 for (int j = 0; j < nargs; j++) { | |
| 2091 const Type *targ = tf->_domain->field_at(j + TypeFunc::Parms); | |
| 2092 if( targ->basic_type() == T_DOUBLE ) { | |
| 2093 // If any parameters are doubles, they must be rounded before | |
| 2094 // the call, dstore_rounding does gvn.transform | |
| 2095 Node *arg = argument(j); | |
| 2096 arg = dstore_rounding(arg); | |
| 2097 set_argument(j, arg); | |
| 2098 } | |
| 2099 } | |
| 2100 } | |
| 2101 | |
| 12966 | 2102 /** |
| 2103 * Record profiling data exact_kls for Node n with the type system so | |
| 2104 * that it can propagate it (speculation) | |
| 2105 * | |
| 2106 * @param n node that the type applies to | |
| 2107 * @param exact_kls type from profiling | |
| 2108 * | |
| 2109 * @return node with improved type | |
| 2110 */ | |
| 2111 Node* GraphKit::record_profile_for_speculation(Node* n, ciKlass* exact_kls) { | |
| 2112 const TypeOopPtr* current_type = _gvn.type(n)->isa_oopptr(); | |
| 2113 assert(UseTypeSpeculation, "type speculation must be on"); | |
| 2114 if (exact_kls != NULL && | |
| 2115 // nothing to improve if type is already exact | |
| 2116 (current_type == NULL || | |
| 2117 (!current_type->klass_is_exact() && | |
| 2118 (current_type->speculative() == NULL || | |
| 2119 !current_type->speculative()->klass_is_exact())))) { | |
| 2120 const TypeKlassPtr* tklass = TypeKlassPtr::make(exact_kls); | |
| 2121 const TypeOopPtr* xtype = tklass->as_instance_type(); | |
| 2122 assert(xtype->klass_is_exact(), "Should be exact"); | |
| 2123 | |
| 2124 // Build a type with a speculative type (what we think we know | |
| 2125 // about the type but will need a guard when we use it) | |
| 2126 const TypeOopPtr* spec_type = TypeOopPtr::make(TypePtr::BotPTR, Type::OffsetBot, TypeOopPtr::InstanceBot, xtype); | |
| 2127 // We're changing the type, we need a new cast node to carry the | |
| 2128 // new type. The new type depends on the control: what profiling | |
| 2129 // tells us is only valid from here as far as we can tell. | |
| 2130 Node* cast = new(C) CastPPNode(n, spec_type); | |
| 2131 cast->init_req(0, control()); | |
| 2132 cast = _gvn.transform(cast); | |
| 2133 replace_in_map(n, cast); | |
| 2134 n = cast; | |
| 2135 } | |
| 2136 return n; | |
| 2137 } | |
| 2138 | |
| 2139 /** | |
| 2140 * Record profiling data from receiver profiling at an invoke with the | |
| 2141 * type system so that it can propagate it (speculation) | |
| 2142 * | |
| 2143 * @param n receiver node | |
| 2144 * | |
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2145 * @return node with improved type |
| 12966 | 2146 */ |
| 2147 Node* GraphKit::record_profiled_receiver_for_speculation(Node* n) { | |
| 2148 if (!UseTypeSpeculation) { | |
| 2149 return n; | |
| 2150 } | |
| 2151 ciKlass* exact_kls = profile_has_unique_klass(); | |
| 2152 return record_profile_for_speculation(n, exact_kls); | |
| 2153 } | |
| 2154 | |
| 2155 /** | |
| 2156 * Record profiling data from argument profiling at an invoke with the | |
| 2157 * type system so that it can propagate it (speculation) | |
| 2158 * | |
| 2159 * @param dest_method target method for the call | |
| 2160 * @param bc what invoke bytecode is this? | |
| 2161 */ | |
| 2162 void GraphKit::record_profiled_arguments_for_speculation(ciMethod* dest_method, Bytecodes::Code bc) { | |
| 2163 if (!UseTypeSpeculation) { | |
| 2164 return; | |
| 2165 } | |
| 2166 const TypeFunc* tf = TypeFunc::make(dest_method); | |
| 2167 int nargs = tf->_domain->_cnt - TypeFunc::Parms; | |
| 2168 int skip = Bytecodes::has_receiver(bc) ? 1 : 0; | |
| 2169 for (int j = skip, i = 0; j < nargs && i < TypeProfileArgsLimit; j++) { | |
| 2170 const Type *targ = tf->_domain->field_at(j + TypeFunc::Parms); | |
| 2171 if (targ->basic_type() == T_OBJECT || targ->basic_type() == T_ARRAY) { | |
| 2172 ciKlass* better_type = method()->argument_profiled_type(bci(), i); | |
| 2173 if (better_type != NULL) { | |
| 2174 record_profile_for_speculation(argument(j), better_type); | |
| 2175 } | |
| 2176 i++; | |
| 2177 } | |
| 2178 } | |
| 2179 } | |
| 2180 | |
| 2181 /** | |
| 2182 * Record profiling data from parameter profiling at an invoke with | |
| 2183 * the type system so that it can propagate it (speculation) | |
| 2184 */ | |
| 2185 void GraphKit::record_profiled_parameters_for_speculation() { | |
| 2186 if (!UseTypeSpeculation) { | |
| 2187 return; | |
| 2188 } | |
| 2189 for (int i = 0, j = 0; i < method()->arg_size() ; i++) { | |
| 2190 if (_gvn.type(local(i))->isa_oopptr()) { | |
| 2191 ciKlass* better_type = method()->parameter_profiled_type(j); | |
| 2192 if (better_type != NULL) { | |
| 2193 record_profile_for_speculation(local(i), better_type); | |
| 2194 } | |
| 2195 j++; | |
| 2196 } | |
| 2197 } | |
| 2198 } | |
| 2199 | |
| 0 | 2200 void GraphKit::round_double_result(ciMethod* dest_method) { |
| 2201 // A non-strict method may return a double value which has an extended | |
| 2202 // exponent, but this must not be visible in a caller which is 'strict' | |
| 2203 // If a strict caller invokes a non-strict callee, round a double result | |
| 2204 | |
| 2205 BasicType result_type = dest_method->return_type()->basic_type(); | |
| 2206 assert( method() != NULL, "must have caller context"); | |
| 2207 if( result_type == T_DOUBLE && method()->is_strict() && !dest_method->is_strict() ) { | |
| 2208 // Destination method's return value is on top of stack | |
| 2209 // dstore_rounding() does gvn.transform | |
| 2210 Node *result = pop_pair(); | |
| 2211 result = dstore_rounding(result); | |
| 2212 push_pair(result); | |
| 2213 } | |
| 2214 } | |
| 2215 | |
| 2216 // rounding for strict float precision conformance | |
| 2217 Node* GraphKit::precision_rounding(Node* n) { | |
| 2218 return UseStrictFP && _method->flags().is_strict() | |
| 2219 && UseSSE == 0 && Matcher::strict_fp_requires_explicit_rounding | |
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2220 ? _gvn.transform( new (C) RoundFloatNode(0, n) ) |
| 0 | 2221 : n; |
| 2222 } | |
| 2223 | |
| 2224 // rounding for strict double precision conformance | |
| 2225 Node* GraphKit::dprecision_rounding(Node *n) { | |
| 2226 return UseStrictFP && _method->flags().is_strict() | |
| 2227 && UseSSE <= 1 && Matcher::strict_fp_requires_explicit_rounding | |
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2228 ? _gvn.transform( new (C) RoundDoubleNode(0, n) ) |
| 0 | 2229 : n; |
| 2230 } | |
| 2231 | |
| 2232 // rounding for non-strict double stores | |
| 2233 Node* GraphKit::dstore_rounding(Node* n) { | |
| 2234 return Matcher::strict_fp_requires_explicit_rounding | |
| 2235 && UseSSE <= 1 | |
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2236 ? _gvn.transform( new (C) RoundDoubleNode(0, n) ) |
| 0 | 2237 : n; |
| 2238 } | |
| 2239 | |
| 2240 //============================================================================= | |
| 2241 // Generate a fast path/slow path idiom. Graph looks like: | |
| 2242 // [foo] indicates that 'foo' is a parameter | |
| 2243 // | |
| 2244 // [in] NULL | |
| 2245 // \ / | |
| 2246 // CmpP | |
| 2247 // Bool ne | |
| 2248 // If | |
| 2249 // / \ | |
| 2250 // True False-<2> | |
| 2251 // / | | |
| 2252 // / cast_not_null | |
| 2253 // Load | | ^ | |
| 2254 // [fast_test] | | | |
| 2255 // gvn to opt_test | | | |
| 2256 // / \ | <1> | |
| 2257 // True False | | |
| 2258 // | \\ | | |
| 2259 // [slow_call] \[fast_result] | |
| 2260 // Ctl Val \ \ | |
| 2261 // | \ \ | |
| 2262 // Catch <1> \ \ | |
| 2263 // / \ ^ \ \ | |
| 2264 // Ex No_Ex | \ \ | |
| 2265 // | \ \ | \ <2> \ | |
| 2266 // ... \ [slow_res] | | \ [null_result] | |
| 2267 // \ \--+--+--- | | | |
| 2268 // \ | / \ | / | |
| 2269 // --------Region Phi | |
| 2270 // | |
| 2271 //============================================================================= | |
| 2272 // Code is structured as a series of driver functions all called 'do_XXX' that | |
| 2273 // call a set of helper functions. Helper functions first, then drivers. | |
| 2274 | |
| 2275 //------------------------------null_check_oop--------------------------------- | |
| 2276 // Null check oop. Set null-path control into Region in slot 3. | |
| 2277 // Make a cast-not-nullness use the other not-null control. Return cast. | |
| 2278 Node* GraphKit::null_check_oop(Node* value, Node* *null_control, | |
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2279 bool never_see_null, bool safe_for_replace) { |
| 0 | 2280 // Initial NULL check taken path |
| 2281 (*null_control) = top(); | |
| 2282 Node* cast = null_check_common(value, T_OBJECT, false, null_control); | |
| 2283 | |
| 2284 // Generate uncommon_trap: | |
| 2285 if (never_see_null && (*null_control) != top()) { | |
| 2286 // If we see an unexpected null at a check-cast we record it and force a | |
| 2287 // recompile; the offending check-cast will be compiled to handle NULLs. | |
| 2288 // If we see more than one offending BCI, then all checkcasts in the | |
| 2289 // method will be compiled to handle NULLs. | |
| 2290 PreserveJVMState pjvms(this); | |
| 2291 set_control(*null_control); | |
| 332 | 2292 replace_in_map(value, null()); |
| 0 | 2293 uncommon_trap(Deoptimization::Reason_null_check, |
| 2294 Deoptimization::Action_make_not_entrant); | |
| 2295 (*null_control) = top(); // NULL path is dead | |
| 2296 } | |
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2297 if ((*null_control) == top() && safe_for_replace) { |
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2298 replace_in_map(value, cast); |
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2299 } |
| 0 | 2300 |
| 2301 // Cast away null-ness on the result | |
| 2302 return cast; | |
| 2303 } | |
| 2304 | |
| 2305 //------------------------------opt_iff---------------------------------------- | |
| 2306 // Optimize the fast-check IfNode. Set the fast-path region slot 2. | |
| 2307 // Return slow-path control. | |
| 2308 Node* GraphKit::opt_iff(Node* region, Node* iff) { | |
| 2309 IfNode *opt_iff = _gvn.transform(iff)->as_If(); | |
| 2310 | |
| 2311 // Fast path taken; set region slot 2 | |
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2312 Node *fast_taken = _gvn.transform( new (C) IfFalseNode(opt_iff) ); |
| 0 | 2313 region->init_req(2,fast_taken); // Capture fast-control |
| 2314 | |
| 2315 // Fast path not-taken, i.e. slow path | |
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2316 Node *slow_taken = _gvn.transform( new (C) IfTrueNode(opt_iff) ); |
| 0 | 2317 return slow_taken; |
| 2318 } | |
| 2319 | |
| 2320 //-----------------------------make_runtime_call------------------------------- | |
| 2321 Node* GraphKit::make_runtime_call(int flags, | |
| 2322 const TypeFunc* call_type, address call_addr, | |
| 2323 const char* call_name, | |
| 2324 const TypePtr* adr_type, | |
| 2325 // The following parms are all optional. | |
| 2326 // The first NULL ends the list. | |
| 2327 Node* parm0, Node* parm1, | |
| 2328 Node* parm2, Node* parm3, | |
| 2329 Node* parm4, Node* parm5, | |
| 2330 Node* parm6, Node* parm7) { | |
| 2331 // Slow-path call | |
| 2332 bool is_leaf = !(flags & RC_NO_LEAF); | |
| 2333 bool has_io = (!is_leaf && !(flags & RC_NO_IO)); | |
| 2334 if (call_name == NULL) { | |
| 2335 assert(!is_leaf, "must supply name for leaf"); | |
| 2336 call_name = OptoRuntime::stub_name(call_addr); | |
| 2337 } | |
| 2338 CallNode* call; | |
| 2339 if (!is_leaf) { | |
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2340 call = new(C) CallStaticJavaNode(call_type, call_addr, call_name, |
| 0 | 2341 bci(), adr_type); |
| 2342 } else if (flags & RC_NO_FP) { | |
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2343 call = new(C) CallLeafNoFPNode(call_type, call_addr, call_name, adr_type); |
| 0 | 2344 } else { |
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2345 call = new(C) CallLeafNode(call_type, call_addr, call_name, adr_type); |
| 0 | 2346 } |
| 2347 | |
| 2348 // The following is similar to set_edges_for_java_call, | |
| 2349 // except that the memory effects of the call are restricted to AliasIdxRaw. | |
| 2350 | |
| 2351 // Slow path call has no side-effects, uses few values | |
| 2352 bool wide_in = !(flags & RC_NARROW_MEM); | |
| 2353 bool wide_out = (C->get_alias_index(adr_type) == Compile::AliasIdxBot); | |
| 2354 | |
| 2355 Node* prev_mem = NULL; | |
| 2356 if (wide_in) { | |
| 2357 prev_mem = set_predefined_input_for_runtime_call(call); | |
| 2358 } else { | |
| 2359 assert(!wide_out, "narrow in => narrow out"); | |
| 2360 Node* narrow_mem = memory(adr_type); | |
| 2361 prev_mem = reset_memory(); | |
| 2362 map()->set_memory(narrow_mem); | |
| 2363 set_predefined_input_for_runtime_call(call); | |
| 2364 } | |
| 2365 | |
| 2366 // Hook each parm in order. Stop looking at the first NULL. | |
| 2367 if (parm0 != NULL) { call->init_req(TypeFunc::Parms+0, parm0); | |
| 2368 if (parm1 != NULL) { call->init_req(TypeFunc::Parms+1, parm1); | |
| 2369 if (parm2 != NULL) { call->init_req(TypeFunc::Parms+2, parm2); | |
| 2370 if (parm3 != NULL) { call->init_req(TypeFunc::Parms+3, parm3); | |
| 2371 if (parm4 != NULL) { call->init_req(TypeFunc::Parms+4, parm4); | |
| 2372 if (parm5 != NULL) { call->init_req(TypeFunc::Parms+5, parm5); | |
| 2373 if (parm6 != NULL) { call->init_req(TypeFunc::Parms+6, parm6); | |
| 2374 if (parm7 != NULL) { call->init_req(TypeFunc::Parms+7, parm7); | |
| 2375 /* close each nested if ===> */ } } } } } } } } | |
| 2376 assert(call->in(call->req()-1) != NULL, "must initialize all parms"); | |
| 2377 | |
| 2378 if (!is_leaf) { | |
| 2379 // Non-leaves can block and take safepoints: | |
| 2380 add_safepoint_edges(call, ((flags & RC_MUST_THROW) != 0)); | |
| 2381 } | |
| 2382 // Non-leaves can throw exceptions: | |
| 2383 if (has_io) { | |
| 2384 call->set_req(TypeFunc::I_O, i_o()); | |
| 2385 } | |
| 2386 | |
| 2387 if (flags & RC_UNCOMMON) { | |
| 2388 // Set the count to a tiny probability. Cf. Estimate_Block_Frequency. | |
| 2389 // (An "if" probability corresponds roughly to an unconditional count. | |
| 2390 // Sort of.) | |
| 2391 call->set_cnt(PROB_UNLIKELY_MAG(4)); | |
| 2392 } | |
| 2393 | |
| 2394 Node* c = _gvn.transform(call); | |
| 2395 assert(c == call, "cannot disappear"); | |
| 2396 | |
| 2397 if (wide_out) { | |
| 2398 // Slow path call has full side-effects. | |
| 2399 set_predefined_output_for_runtime_call(call); | |
| 2400 } else { | |
| 2401 // Slow path call has few side-effects, and/or sets few values. | |
| 2402 set_predefined_output_for_runtime_call(call, prev_mem, adr_type); | |
| 2403 } | |
| 2404 | |
| 2405 if (has_io) { | |
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2406 set_i_o(_gvn.transform(new (C) ProjNode(call, TypeFunc::I_O))); |
| 0 | 2407 } |
| 2408 return call; | |
| 2409 | |
| 2410 } | |
| 2411 | |
| 2412 //------------------------------merge_memory----------------------------------- | |
| 2413 // Merge memory from one path into the current memory state. | |
| 2414 void GraphKit::merge_memory(Node* new_mem, Node* region, int new_path) { | |
| 2415 for (MergeMemStream mms(merged_memory(), new_mem->as_MergeMem()); mms.next_non_empty2(); ) { | |
| 2416 Node* old_slice = mms.force_memory(); | |
| 2417 Node* new_slice = mms.memory2(); | |
| 2418 if (old_slice != new_slice) { | |
| 2419 PhiNode* phi; | |
| 2420 if (new_slice->is_Phi() && new_slice->as_Phi()->region() == region) { | |
| 2421 phi = new_slice->as_Phi(); | |
| 2422 #ifdef ASSERT | |
| 2423 if (old_slice->is_Phi() && old_slice->as_Phi()->region() == region) | |
| 2424 old_slice = old_slice->in(new_path); | |
| 2425 // Caller is responsible for ensuring that any pre-existing | |
| 2426 // phis are already aware of old memory. | |
| 2427 int old_path = (new_path > 1) ? 1 : 2; // choose old_path != new_path | |
| 2428 assert(phi->in(old_path) == old_slice, "pre-existing phis OK"); | |
| 2429 #endif | |
| 2430 mms.set_memory(phi); | |
| 2431 } else { | |
| 2432 phi = PhiNode::make(region, old_slice, Type::MEMORY, mms.adr_type(C)); | |
| 2433 _gvn.set_type(phi, Type::MEMORY); | |
| 2434 phi->set_req(new_path, new_slice); | |
| 2435 mms.set_memory(_gvn.transform(phi)); // assume it is complete | |
| 2436 } | |
| 2437 } | |
| 2438 } | |
| 2439 } | |
| 2440 | |
| 2441 //------------------------------make_slow_call_ex------------------------------ | |
| 2442 // Make the exception handler hookups for the slow call | |
| 2443 void GraphKit::make_slow_call_ex(Node* call, ciInstanceKlass* ex_klass, bool separate_io_proj) { | |
| 2444 if (stopped()) return; | |
| 2445 | |
| 2446 // Make a catch node with just two handlers: fall-through and catch-all | |
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2447 Node* i_o = _gvn.transform( new (C) ProjNode(call, TypeFunc::I_O, separate_io_proj) ); |
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2448 Node* catc = _gvn.transform( new (C) CatchNode(control(), i_o, 2) ); |
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2449 Node* norm = _gvn.transform( new (C) CatchProjNode(catc, CatchProjNode::fall_through_index, CatchProjNode::no_handler_bci) ); |
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2450 Node* excp = _gvn.transform( new (C) CatchProjNode(catc, CatchProjNode::catch_all_index, CatchProjNode::no_handler_bci) ); |
| 0 | 2451 |
| 2452 { PreserveJVMState pjvms(this); | |
| 2453 set_control(excp); | |
| 2454 set_i_o(i_o); | |
| 2455 | |
| 2456 if (excp != top()) { | |
| 2457 // Create an exception state also. | |
| 2458 // Use an exact type if the caller has specified a specific exception. | |
| 2459 const Type* ex_type = TypeOopPtr::make_from_klass_unique(ex_klass)->cast_to_ptr_type(TypePtr::NotNull); | |
|
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2460 Node* ex_oop = new (C) CreateExNode(ex_type, control(), i_o); |
| 0 | 2461 add_exception_state(make_exception_state(_gvn.transform(ex_oop))); |
| 2462 } | |
| 2463 } | |
| 2464 | |
| 2465 // Get the no-exception control from the CatchNode. | |
| 2466 set_control(norm); | |
| 2467 } | |
| 2468 | |
| 2469 | |
| 2470 //-------------------------------gen_subtype_check----------------------------- | |
| 2471 // Generate a subtyping check. Takes as input the subtype and supertype. | |
| 2472 // Returns 2 values: sets the default control() to the true path and returns | |
| 2473 // the false path. Only reads invariant memory; sets no (visible) memory. | |
| 2474 // The PartialSubtypeCheckNode sets the hidden 1-word cache in the encoding | |
| 2475 // but that's not exposed to the optimizer. This call also doesn't take in an | |
| 2476 // Object; if you wish to check an Object you need to load the Object's class | |
| 2477 // prior to coming here. | |
| 2478 Node* GraphKit::gen_subtype_check(Node* subklass, Node* superklass) { | |
| 2479 // Fast check for identical types, perhaps identical constants. | |
| 2480 // The types can even be identical non-constants, in cases | |
| 2481 // involving Array.newInstance, Object.clone, etc. | |
| 2482 if (subklass == superklass) | |
| 2483 return top(); // false path is dead; no test needed. | |
| 2484 | |
| 2485 if (_gvn.type(superklass)->singleton()) { | |
| 2486 ciKlass* superk = _gvn.type(superklass)->is_klassptr()->klass(); | |
| 2487 ciKlass* subk = _gvn.type(subklass)->is_klassptr()->klass(); | |
| 2488 | |
| 2489 // In the common case of an exact superklass, try to fold up the | |
| 2490 // test before generating code. You may ask, why not just generate | |
| 2491 // the code and then let it fold up? The answer is that the generated | |
| 2492 // code will necessarily include null checks, which do not always | |
| 2493 // completely fold away. If they are also needless, then they turn | |
| 2494 // into a performance loss. Example: | |
| 2495 // Foo[] fa = blah(); Foo x = fa[0]; fa[1] = x; | |
| 2496 // Here, the type of 'fa' is often exact, so the store check | |
| 2497 // of fa[1]=x will fold up, without testing the nullness of x. | |
| 2498 switch (static_subtype_check(superk, subk)) { | |
| 2499 case SSC_always_false: | |
| 2500 { | |
| 2501 Node* always_fail = control(); | |
| 2502 set_control(top()); | |
| 2503 return always_fail; | |
| 2504 } | |
| 2505 case SSC_always_true: | |
| 2506 return top(); | |
| 2507 case SSC_easy_test: | |
| 2508 { | |
| 2509 // Just do a direct pointer compare and be done. | |
|
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2510 Node* cmp = _gvn.transform( new(C) CmpPNode(subklass, superklass) ); |
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2511 Node* bol = _gvn.transform( new(C) BoolNode(cmp, BoolTest::eq) ); |
| 0 | 2512 IfNode* iff = create_and_xform_if(control(), bol, PROB_STATIC_FREQUENT, COUNT_UNKNOWN); |
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2513 set_control( _gvn.transform( new(C) IfTrueNode (iff) ) ); |
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2514 return _gvn.transform( new(C) IfFalseNode(iff) ); |
| 0 | 2515 } |
| 2516 case SSC_full_test: | |
| 2517 break; | |
| 2518 default: | |
| 2519 ShouldNotReachHere(); | |
| 2520 } | |
| 2521 } | |
| 2522 | |
| 2523 // %%% Possible further optimization: Even if the superklass is not exact, | |
| 2524 // if the subklass is the unique subtype of the superklass, the check | |
| 2525 // will always succeed. We could leave a dependency behind to ensure this. | |
| 2526 | |
| 2527 // First load the super-klass's check-offset | |
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2528 Node *p1 = basic_plus_adr( superklass, superklass, in_bytes(Klass::super_check_offset_offset()) ); |
|
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2529 Node *chk_off = _gvn.transform( new (C) LoadINode( NULL, memory(p1), p1, _gvn.type(p1)->is_ptr() ) ); |
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2530 int cacheoff_con = in_bytes(Klass::secondary_super_cache_offset()); |
| 0 | 2531 bool might_be_cache = (find_int_con(chk_off, cacheoff_con) == cacheoff_con); |
| 2532 | |
| 2533 // Load from the sub-klass's super-class display list, or a 1-word cache of | |
| 2534 // the secondary superclass list, or a failing value with a sentinel offset | |
| 2535 // if the super-klass is an interface or exceptionally deep in the Java | |
| 2536 // hierarchy and we have to scan the secondary superclass list the hard way. | |
| 2537 // Worst-case type is a little odd: NULL is allowed as a result (usually | |
| 2538 // klass loads can never produce a NULL). | |
| 2539 Node *chk_off_X = ConvI2X(chk_off); | |
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2540 Node *p2 = _gvn.transform( new (C) AddPNode(subklass,subklass,chk_off_X) ); |
| 0 | 2541 // For some types like interfaces the following loadKlass is from a 1-word |
| 2542 // cache which is mutable so can't use immutable memory. Other | |
| 2543 // types load from the super-class display table which is immutable. | |
| 2544 Node *kmem = might_be_cache ? memory(p2) : immutable_memory(); | |
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2545 Node *nkls = _gvn.transform( LoadKlassNode::make( _gvn, kmem, p2, _gvn.type(p2)->is_ptr(), TypeKlassPtr::OBJECT_OR_NULL ) ); |
| 0 | 2546 |
| 2547 // Compile speed common case: ARE a subtype and we canNOT fail | |
| 2548 if( superklass == nkls ) | |
| 2549 return top(); // false path is dead; no test needed. | |
| 2550 | |
| 2551 // See if we get an immediate positive hit. Happens roughly 83% of the | |
| 2552 // time. Test to see if the value loaded just previously from the subklass | |
| 2553 // is exactly the superklass. | |
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2554 Node *cmp1 = _gvn.transform( new (C) CmpPNode( superklass, nkls ) ); |
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2555 Node *bol1 = _gvn.transform( new (C) BoolNode( cmp1, BoolTest::eq ) ); |
| 0 | 2556 IfNode *iff1 = create_and_xform_if( control(), bol1, PROB_LIKELY(0.83f), COUNT_UNKNOWN ); |
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2557 Node *iftrue1 = _gvn.transform( new (C) IfTrueNode ( iff1 ) ); |
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2558 set_control( _gvn.transform( new (C) IfFalseNode( iff1 ) ) ); |
| 0 | 2559 |
| 2560 // Compile speed common case: Check for being deterministic right now. If | |
| 2561 // chk_off is a constant and not equal to cacheoff then we are NOT a | |
| 2562 // subklass. In this case we need exactly the 1 test above and we can | |
| 2563 // return those results immediately. | |
| 2564 if (!might_be_cache) { | |
| 2565 Node* not_subtype_ctrl = control(); | |
| 2566 set_control(iftrue1); // We need exactly the 1 test above | |
| 2567 return not_subtype_ctrl; | |
| 2568 } | |
| 2569 | |
| 2570 // Gather the various success & failures here | |
|
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2571 RegionNode *r_ok_subtype = new (C) RegionNode(4); |
| 0 | 2572 record_for_igvn(r_ok_subtype); |
|
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2573 RegionNode *r_not_subtype = new (C) RegionNode(3); |
| 0 | 2574 record_for_igvn(r_not_subtype); |
| 2575 | |
| 2576 r_ok_subtype->init_req(1, iftrue1); | |
| 2577 | |
| 2578 // Check for immediate negative hit. Happens roughly 11% of the time (which | |
| 2579 // is roughly 63% of the remaining cases). Test to see if the loaded | |
| 2580 // check-offset points into the subklass display list or the 1-element | |
| 2581 // cache. If it points to the display (and NOT the cache) and the display | |
| 2582 // missed then it's not a subtype. | |
| 2583 Node *cacheoff = _gvn.intcon(cacheoff_con); | |
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2584 Node *cmp2 = _gvn.transform( new (C) CmpINode( chk_off, cacheoff ) ); |
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2585 Node *bol2 = _gvn.transform( new (C) BoolNode( cmp2, BoolTest::ne ) ); |
| 0 | 2586 IfNode *iff2 = create_and_xform_if( control(), bol2, PROB_LIKELY(0.63f), COUNT_UNKNOWN ); |
|
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2587 r_not_subtype->init_req(1, _gvn.transform( new (C) IfTrueNode (iff2) ) ); |
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2588 set_control( _gvn.transform( new (C) IfFalseNode(iff2) ) ); |
| 0 | 2589 |
|
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2590 // Check for self. Very rare to get here, but it is taken 1/3 the time. |
| 0 | 2591 // No performance impact (too rare) but allows sharing of secondary arrays |
| 2592 // which has some footprint reduction. | |
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2593 Node *cmp3 = _gvn.transform( new (C) CmpPNode( subklass, superklass ) ); |
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2594 Node *bol3 = _gvn.transform( new (C) BoolNode( cmp3, BoolTest::eq ) ); |
| 0 | 2595 IfNode *iff3 = create_and_xform_if( control(), bol3, PROB_LIKELY(0.36f), COUNT_UNKNOWN ); |
|
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2596 r_ok_subtype->init_req(2, _gvn.transform( new (C) IfTrueNode ( iff3 ) ) ); |
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2597 set_control( _gvn.transform( new (C) IfFalseNode( iff3 ) ) ); |
| 0 | 2598 |
|
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2599 // -- Roads not taken here: -- |
|
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2600 // We could also have chosen to perform the self-check at the beginning |
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2601 // of this code sequence, as the assembler does. This would not pay off |
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2602 // the same way, since the optimizer, unlike the assembler, can perform |
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2603 // static type analysis to fold away many successful self-checks. |
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2604 // Non-foldable self checks work better here in second position, because |
|
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2605 // the initial primary superclass check subsumes a self-check for most |
|
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2606 // types. An exception would be a secondary type like array-of-interface, |
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2607 // which does not appear in its own primary supertype display. |
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2608 // Finally, we could have chosen to move the self-check into the |
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2609 // PartialSubtypeCheckNode, and from there out-of-line in a platform |
|
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2610 // dependent manner. But it is worthwhile to have the check here, |
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2611 // where it can be perhaps be optimized. The cost in code space is |
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2612 // small (register compare, branch). |
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2613 |
| 0 | 2614 // Now do a linear scan of the secondary super-klass array. Again, no real |
| 2615 // performance impact (too rare) but it's gotta be done. | |
| 2616 // Since the code is rarely used, there is no penalty for moving it | |
|
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2617 // out of line, and it can only improve I-cache density. |
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2618 // The decision to inline or out-of-line this final check is platform |
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2619 // dependent, and is found in the AD file definition of PartialSubtypeCheck. |
| 0 | 2620 Node* psc = _gvn.transform( |
|
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2621 new (C) PartialSubtypeCheckNode(control(), subklass, superklass) ); |
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2622 |
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2623 Node *cmp4 = _gvn.transform( new (C) CmpPNode( psc, null() ) ); |
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2624 Node *bol4 = _gvn.transform( new (C) BoolNode( cmp4, BoolTest::ne ) ); |
| 0 | 2625 IfNode *iff4 = create_and_xform_if( control(), bol4, PROB_FAIR, COUNT_UNKNOWN ); |
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2626 r_not_subtype->init_req(2, _gvn.transform( new (C) IfTrueNode (iff4) ) ); |
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2627 r_ok_subtype ->init_req(3, _gvn.transform( new (C) IfFalseNode(iff4) ) ); |
| 0 | 2628 |
| 2629 // Return false path; set default control to true path. | |
| 2630 set_control( _gvn.transform(r_ok_subtype) ); | |
| 2631 return _gvn.transform(r_not_subtype); | |
| 2632 } | |
| 2633 | |
| 2634 //----------------------------static_subtype_check----------------------------- | |
| 2635 // Shortcut important common cases when superklass is exact: | |
| 2636 // (0) superklass is java.lang.Object (can occur in reflective code) | |
| 2637 // (1) subklass is already limited to a subtype of superklass => always ok | |
| 2638 // (2) subklass does not overlap with superklass => always fail | |
| 2639 // (3) superklass has NO subtypes and we can check with a simple compare. | |
| 2640 int GraphKit::static_subtype_check(ciKlass* superk, ciKlass* subk) { | |
| 2641 if (StressReflectiveCode) { | |
| 2642 return SSC_full_test; // Let caller generate the general case. | |
| 2643 } | |
| 2644 | |
| 2645 if (superk == env()->Object_klass()) { | |
| 2646 return SSC_always_true; // (0) this test cannot fail | |
| 2647 } | |
| 2648 | |
| 2649 ciType* superelem = superk; | |
| 2650 if (superelem->is_array_klass()) | |
| 2651 superelem = superelem->as_array_klass()->base_element_type(); | |
| 2652 | |
| 2653 if (!subk->is_interface()) { // cannot trust static interface types yet | |
| 2654 if (subk->is_subtype_of(superk)) { | |
| 2655 return SSC_always_true; // (1) false path dead; no dynamic test needed | |
| 2656 } | |
| 2657 if (!(superelem->is_klass() && superelem->as_klass()->is_interface()) && | |
| 2658 !superk->is_subtype_of(subk)) { | |
| 2659 return SSC_always_false; | |
| 2660 } | |
| 2661 } | |
| 2662 | |
| 2663 // If casting to an instance klass, it must have no subtypes | |
| 2664 if (superk->is_interface()) { | |
| 2665 // Cannot trust interfaces yet. | |
| 2666 // %%% S.B. superk->nof_implementors() == 1 | |
| 2667 } else if (superelem->is_instance_klass()) { | |
| 2668 ciInstanceKlass* ik = superelem->as_instance_klass(); | |
| 2669 if (!ik->has_subklass() && !ik->is_interface()) { | |
| 2670 if (!ik->is_final()) { | |
| 2671 // Add a dependency if there is a chance of a later subclass. | |
| 2672 C->dependencies()->assert_leaf_type(ik); | |
| 2673 } | |
| 2674 return SSC_easy_test; // (3) caller can do a simple ptr comparison | |
| 2675 } | |
| 2676 } else { | |
| 2677 // A primitive array type has no subtypes. | |
| 2678 return SSC_easy_test; // (3) caller can do a simple ptr comparison | |
| 2679 } | |
| 2680 | |
| 2681 return SSC_full_test; | |
| 2682 } | |
| 2683 | |
| 2684 // Profile-driven exact type check: | |
| 2685 Node* GraphKit::type_check_receiver(Node* receiver, ciKlass* klass, | |
| 2686 float prob, | |
| 2687 Node* *casted_receiver) { | |
| 2688 const TypeKlassPtr* tklass = TypeKlassPtr::make(klass); | |
| 2689 Node* recv_klass = load_object_klass(receiver); | |
| 2690 Node* want_klass = makecon(tklass); | |
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2691 Node* cmp = _gvn.transform( new(C) CmpPNode(recv_klass, want_klass) ); |
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2692 Node* bol = _gvn.transform( new(C) BoolNode(cmp, BoolTest::eq) ); |
| 0 | 2693 IfNode* iff = create_and_xform_if(control(), bol, prob, COUNT_UNKNOWN); |
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2694 set_control( _gvn.transform( new(C) IfTrueNode (iff) )); |
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|
2695 Node* fail = _gvn.transform( new(C) IfFalseNode(iff) ); |
| 0 | 2696 |
| 2697 const TypeOopPtr* recv_xtype = tklass->as_instance_type(); | |
| 2698 assert(recv_xtype->klass_is_exact(), ""); | |
| 2699 | |
| 2700 // Subsume downstream occurrences of receiver with a cast to | |
| 2701 // recv_xtype, since now we know what the type will be. | |
|
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|
2702 Node* cast = new(C) CheckCastPPNode(control(), receiver, recv_xtype); |
| 0 | 2703 (*casted_receiver) = _gvn.transform(cast); |
| 2704 // (User must make the replace_in_map call.) | |
| 2705 | |
| 2706 return fail; | |
| 2707 } | |
| 2708 | |
| 2709 | |
|
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2710 //------------------------------seems_never_null------------------------------- |
|
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2711 // Use null_seen information if it is available from the profile. |
|
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|
2712 // If we see an unexpected null at a type check we record it and force a |
|
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|
2713 // recompile; the offending check will be recompiled to handle NULLs. |
|
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2714 // If we see several offending BCIs, then all checks in the |
|
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|
2715 // method will be recompiled. |
|
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|
2716 bool GraphKit::seems_never_null(Node* obj, ciProfileData* data) { |
|
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2717 if (UncommonNullCast // Cutout for this technique |
|
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2718 && obj != null() // And not the -Xcomp stupid case? |
|
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2719 && !too_many_traps(Deoptimization::Reason_null_check) |
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|
2720 ) { |
|
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|
2721 if (data == NULL) |
|
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2722 // Edge case: no mature data. Be optimistic here. |
|
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|
2723 return true; |
|
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|
2724 // If the profile has not seen a null, assume it won't happen. |
|
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2725 assert(java_bc() == Bytecodes::_checkcast || |
|
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2726 java_bc() == Bytecodes::_instanceof || |
|
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2727 java_bc() == Bytecodes::_aastore, "MDO must collect null_seen bit here"); |
|
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2728 return !data->as_BitData()->null_seen(); |
|
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|
2729 } |
|
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|
2730 return false; |
|
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|
2731 } |
|
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|
2732 |
|
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2733 //------------------------maybe_cast_profiled_receiver------------------------- |
|
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2734 // If the profile has seen exactly one type, narrow to exactly that type. |
|
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2735 // Subsequent type checks will always fold up. |
|
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2736 Node* GraphKit::maybe_cast_profiled_receiver(Node* not_null_obj, |
| 12966 | 2737 ciKlass* require_klass, |
|
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2738 ciKlass* spec_klass, |
| 12966 | 2739 bool safe_for_replace) { |
|
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2740 if (!UseTypeProfile || !TypeProfileCasts) return NULL; |
|
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2741 |
|
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2742 Deoptimization::DeoptReason reason = spec_klass == NULL ? Deoptimization::Reason_class_check : Deoptimization::Reason_speculate_class_check; |
|
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2743 |
|
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2744 // Make sure we haven't already deoptimized from this tactic. |
|
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2745 if (too_many_traps(reason)) |
|
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2746 return NULL; |
|
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|
2747 |
|
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2748 // (No, this isn't a call, but it's enough like a virtual call |
|
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2749 // to use the same ciMethod accessor to get the profile info...) |
| 12966 | 2750 // If we have a speculative type use it instead of profiling (which |
| 2751 // may not help us) | |
| 2752 ciKlass* exact_kls = spec_klass == NULL ? profile_has_unique_klass() : spec_klass; | |
| 2753 if (exact_kls != NULL) {// no cast failures here | |
|
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2754 if (require_klass == NULL || |
|
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|
2755 static_subtype_check(require_klass, exact_kls) == SSC_always_true) { |
| 12966 | 2756 // If we narrow the type to match what the type profile sees or |
| 2757 // the speculative type, we can then remove the rest of the | |
| 2758 // cast. | |
|
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2759 // This is a win, even if the exact_kls is very specific, |
|
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2760 // because downstream operations, such as method calls, |
|
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2761 // will often benefit from the sharper type. |
|
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2762 Node* exact_obj = not_null_obj; // will get updated in place... |
|
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2763 Node* slow_ctl = type_check_receiver(exact_obj, exact_kls, 1.0, |
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|
2764 &exact_obj); |
|
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|
2765 { PreserveJVMState pjvms(this); |
|
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|
2766 set_control(slow_ctl); |
|
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|
2767 uncommon_trap(reason, |
|
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|
2768 Deoptimization::Action_maybe_recompile); |
|
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|
2769 } |
| 12966 | 2770 if (safe_for_replace) { |
| 2771 replace_in_map(not_null_obj, exact_obj); | |
| 2772 } | |
|
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2773 return exact_obj; |
|
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|
2774 } |
|
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|
2775 // assert(ssc == SSC_always_true)... except maybe the profile lied to us. |
|
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|
2776 } |
|
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|
2777 |
|
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|
2778 return NULL; |
|
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|
2779 } |
|
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|
2780 |
| 12966 | 2781 /** |
| 2782 * Cast obj to type and emit guard unless we had too many traps here | |
| 2783 * already | |
| 2784 * | |
| 2785 * @param obj node being casted | |
| 2786 * @param type type to cast the node to | |
| 2787 * @param not_null true if we know node cannot be null | |
| 2788 */ | |
| 2789 Node* GraphKit::maybe_cast_profiled_obj(Node* obj, | |
| 2790 ciKlass* type, | |
| 2791 bool not_null) { | |
| 2792 // type == NULL if profiling tells us this object is always null | |
| 2793 if (type != NULL) { | |
|
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|
2794 Deoptimization::DeoptReason class_reason = Deoptimization::Reason_speculate_class_check; |
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2795 Deoptimization::DeoptReason null_reason = Deoptimization::Reason_null_check; |
|
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|
2796 if (!too_many_traps(null_reason) && |
|
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|
2797 !too_many_traps(class_reason)) { |
| 12966 | 2798 Node* not_null_obj = NULL; |
| 2799 // not_null is true if we know the object is not null and | |
| 2800 // there's no need for a null check | |
| 2801 if (!not_null) { | |
| 2802 Node* null_ctl = top(); | |
| 2803 not_null_obj = null_check_oop(obj, &null_ctl, true, true); | |
| 2804 assert(null_ctl->is_top(), "no null control here"); | |
| 2805 } else { | |
| 2806 not_null_obj = obj; | |
| 2807 } | |
| 2808 | |
| 2809 Node* exact_obj = not_null_obj; | |
| 2810 ciKlass* exact_kls = type; | |
| 2811 Node* slow_ctl = type_check_receiver(exact_obj, exact_kls, 1.0, | |
| 2812 &exact_obj); | |
| 2813 { | |
| 2814 PreserveJVMState pjvms(this); | |
| 2815 set_control(slow_ctl); | |
|
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|
2816 uncommon_trap(class_reason, |
| 12966 | 2817 Deoptimization::Action_maybe_recompile); |
| 2818 } | |
| 2819 replace_in_map(not_null_obj, exact_obj); | |
| 2820 obj = exact_obj; | |
| 2821 } | |
| 2822 } else { | |
| 2823 if (!too_many_traps(Deoptimization::Reason_null_assert)) { | |
| 2824 Node* exact_obj = null_assert(obj); | |
| 2825 replace_in_map(obj, exact_obj); | |
| 2826 obj = exact_obj; | |
| 2827 } | |
| 2828 } | |
| 2829 return obj; | |
| 2830 } | |
|
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2831 |
| 0 | 2832 //-------------------------------gen_instanceof-------------------------------- |
| 2833 // Generate an instance-of idiom. Used by both the instance-of bytecode | |
| 2834 // and the reflective instance-of call. | |
| 12966 | 2835 Node* GraphKit::gen_instanceof(Node* obj, Node* superklass, bool safe_for_replace) { |
|
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|
2836 kill_dead_locals(); // Benefit all the uncommon traps |
| 0 | 2837 assert( !stopped(), "dead parse path should be checked in callers" ); |
| 2838 assert(!TypePtr::NULL_PTR->higher_equal(_gvn.type(superklass)->is_klassptr()), | |
| 2839 "must check for not-null not-dead klass in callers"); | |
| 2840 | |
| 2841 // Make the merge point | |
| 2842 enum { _obj_path = 1, _fail_path, _null_path, PATH_LIMIT }; | |
|
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2843 RegionNode* region = new(C) RegionNode(PATH_LIMIT); |
|
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|
2844 Node* phi = new(C) PhiNode(region, TypeInt::BOOL); |
| 0 | 2845 C->set_has_split_ifs(true); // Has chance for split-if optimization |
| 2846 | |
|
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|
2847 ciProfileData* data = NULL; |
|
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|
2848 if (java_bc() == Bytecodes::_instanceof) { // Only for the bytecode |
|
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2849 data = method()->method_data()->bci_to_data(bci()); |
|
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|
2850 } |
|
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|
2851 bool never_see_null = (ProfileDynamicTypes // aggressive use of profile |
|
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|
2852 && seems_never_null(obj, data)); |
|
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|
2853 |
| 0 | 2854 // Null check; get casted pointer; set region slot 3 |
| 2855 Node* null_ctl = top(); | |
|
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|
2856 Node* not_null_obj = null_check_oop(obj, &null_ctl, never_see_null, safe_for_replace); |
| 0 | 2857 |
| 2858 // If not_null_obj is dead, only null-path is taken | |
| 2859 if (stopped()) { // Doing instance-of on a NULL? | |
| 2860 set_control(null_ctl); | |
| 2861 return intcon(0); | |
| 2862 } | |
| 2863 region->init_req(_null_path, null_ctl); | |
| 2864 phi ->init_req(_null_path, intcon(0)); // Set null path value | |
|
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|
2865 if (null_ctl == top()) { |
|
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|
2866 // Do this eagerly, so that pattern matches like is_diamond_phi |
|
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|
2867 // will work even during parsing. |
|
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|
2868 assert(_null_path == PATH_LIMIT-1, "delete last"); |
|
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|
2869 region->del_req(_null_path); |
|
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|
2870 phi ->del_req(_null_path); |
|
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|
2871 } |
|
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|
2872 |
| 12966 | 2873 // Do we know the type check always succeed? |
| 2874 bool known_statically = false; | |
| 2875 if (_gvn.type(superklass)->singleton()) { | |
| 2876 ciKlass* superk = _gvn.type(superklass)->is_klassptr()->klass(); | |
| 2877 ciKlass* subk = _gvn.type(obj)->is_oopptr()->klass(); | |
| 2878 if (subk != NULL && subk->is_loaded()) { | |
| 2879 int static_res = static_subtype_check(superk, subk); | |
| 2880 known_statically = (static_res == SSC_always_true || static_res == SSC_always_false); | |
|
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|
2881 } |
| 12966 | 2882 } |
| 2883 | |
| 2884 if (known_statically && UseTypeSpeculation) { | |
|
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|
2885 // If we know the type check always succeeds then we don't use the |
| 12966 | 2886 // profiling data at this bytecode. Don't lose it, feed it to the |
| 2887 // type system as a speculative type. | |
| 2888 not_null_obj = record_profiled_receiver_for_speculation(not_null_obj); | |
| 2889 } else { | |
| 2890 const TypeOopPtr* obj_type = _gvn.type(obj)->is_oopptr(); | |
| 2891 // We may not have profiling here or it may not help us. If we | |
| 2892 // have a speculative type use it to perform an exact cast. | |
| 2893 ciKlass* spec_obj_type = obj_type->speculative_type(); | |
| 2894 if (spec_obj_type != NULL || (ProfileDynamicTypes && data != NULL)) { | |
| 2895 Node* cast_obj = maybe_cast_profiled_receiver(not_null_obj, NULL, spec_obj_type, safe_for_replace); | |
| 2896 if (stopped()) { // Profile disagrees with this path. | |
| 2897 set_control(null_ctl); // Null is the only remaining possibility. | |
| 2898 return intcon(0); | |
| 2899 } | |
| 2900 if (cast_obj != NULL) { | |
| 2901 not_null_obj = cast_obj; | |
| 2902 } | |
| 2903 } | |
|
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2904 } |
| 0 | 2905 |
| 2906 // Load the object's klass | |
| 2907 Node* obj_klass = load_object_klass(not_null_obj); | |
| 2908 | |
| 2909 // Generate the subtype check | |
| 2910 Node* not_subtype_ctrl = gen_subtype_check(obj_klass, superklass); | |
| 2911 | |
| 2912 // Plug in the success path to the general merge in slot 1. | |
| 2913 region->init_req(_obj_path, control()); | |
| 2914 phi ->init_req(_obj_path, intcon(1)); | |
| 2915 | |
| 2916 // Plug in the failing path to the general merge in slot 2. | |
| 2917 region->init_req(_fail_path, not_subtype_ctrl); | |
| 2918 phi ->init_req(_fail_path, intcon(0)); | |
| 2919 | |
| 2920 // Return final merged results | |
| 2921 set_control( _gvn.transform(region) ); | |
| 2922 record_for_igvn(region); | |
| 2923 return _gvn.transform(phi); | |
| 2924 } | |
| 2925 | |
| 2926 //-------------------------------gen_checkcast--------------------------------- | |
| 2927 // Generate a checkcast idiom. Used by both the checkcast bytecode and the | |
| 2928 // array store bytecode. Stack must be as-if BEFORE doing the bytecode so the | |
| 2929 // uncommon-trap paths work. Adjust stack after this call. | |
| 2930 // If failure_control is supplied and not null, it is filled in with | |
| 2931 // the control edge for the cast failure. Otherwise, an appropriate | |
| 2932 // uncommon trap or exception is thrown. | |
| 2933 Node* GraphKit::gen_checkcast(Node *obj, Node* superklass, | |
| 2934 Node* *failure_control) { | |
| 2935 kill_dead_locals(); // Benefit all the uncommon traps | |
| 2936 const TypeKlassPtr *tk = _gvn.type(superklass)->is_klassptr(); | |
| 2937 const Type *toop = TypeOopPtr::make_from_klass(tk->klass()); | |
| 2938 | |
| 2939 // Fast cutout: Check the case that the cast is vacuously true. | |
| 2940 // This detects the common cases where the test will short-circuit | |
| 2941 // away completely. We do this before we perform the null check, | |
| 2942 // because if the test is going to turn into zero code, we don't | |
| 2943 // want a residual null check left around. (Causes a slowdown, | |
| 2944 // for example, in some objArray manipulations, such as a[i]=a[j].) | |
| 2945 if (tk->singleton()) { | |
| 2946 const TypeOopPtr* objtp = _gvn.type(obj)->isa_oopptr(); | |
| 2947 if (objtp != NULL && objtp->klass() != NULL) { | |
| 2948 switch (static_subtype_check(tk->klass(), objtp->klass())) { | |
| 2949 case SSC_always_true: | |
| 12966 | 2950 // If we know the type check always succeed then we don't use |
| 2951 // the profiling data at this bytecode. Don't lose it, feed it | |
| 2952 // to the type system as a speculative type. | |
| 2953 return record_profiled_receiver_for_speculation(obj); | |
| 0 | 2954 case SSC_always_false: |
| 2955 // It needs a null check because a null will *pass* the cast check. | |
| 2956 // A non-null value will always produce an exception. | |
|
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2957 return null_assert(obj); |
| 0 | 2958 } |
| 2959 } | |
| 2960 } | |
| 2961 | |
| 2962 ciProfileData* data = NULL; | |
|
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2963 bool safe_for_replace = false; |
| 0 | 2964 if (failure_control == NULL) { // use MDO in regular case only |
| 2965 assert(java_bc() == Bytecodes::_aastore || | |
| 2966 java_bc() == Bytecodes::_checkcast, | |
| 2967 "interpreter profiles type checks only for these BCs"); | |
| 2968 data = method()->method_data()->bci_to_data(bci()); | |
|
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2969 safe_for_replace = true; |
| 0 | 2970 } |
| 2971 | |
| 2972 // Make the merge point | |
| 2973 enum { _obj_path = 1, _null_path, PATH_LIMIT }; | |
|
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2974 RegionNode* region = new (C) RegionNode(PATH_LIMIT); |
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2975 Node* phi = new (C) PhiNode(region, toop); |
| 0 | 2976 C->set_has_split_ifs(true); // Has chance for split-if optimization |
| 2977 | |
| 2978 // Use null-cast information if it is available | |
|
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2979 bool never_see_null = ((failure_control == NULL) // regular case only |
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2980 && seems_never_null(obj, data)); |
| 0 | 2981 |
| 2982 // Null check; get casted pointer; set region slot 3 | |
| 2983 Node* null_ctl = top(); | |
|
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2984 Node* not_null_obj = null_check_oop(obj, &null_ctl, never_see_null, safe_for_replace); |
| 0 | 2985 |
| 2986 // If not_null_obj is dead, only null-path is taken | |
| 2987 if (stopped()) { // Doing instance-of on a NULL? | |
| 2988 set_control(null_ctl); | |
| 2989 return null(); | |
| 2990 } | |
| 2991 region->init_req(_null_path, null_ctl); | |
| 2992 phi ->init_req(_null_path, null()); // Set null path value | |
|
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2993 if (null_ctl == top()) { |
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2994 // Do this eagerly, so that pattern matches like is_diamond_phi |
|
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2995 // will work even during parsing. |
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|
2996 assert(_null_path == PATH_LIMIT-1, "delete last"); |
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2997 region->del_req(_null_path); |
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2998 phi ->del_req(_null_path); |
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2999 } |
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3000 |
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3001 Node* cast_obj = NULL; |
|
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|
3002 if (tk->klass_is_exact()) { |
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|
3003 // The following optimization tries to statically cast the speculative type of the object |
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3004 // (for example obtained during profiling) to the type of the superklass and then do a |
|
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3005 // dynamic check that the type of the object is what we expect. To work correctly |
|
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3006 // for checkcast and aastore the type of superklass should be exact. |
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|
3007 const TypeOopPtr* obj_type = _gvn.type(obj)->is_oopptr(); |
|
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3008 // We may not have profiling here or it may not help us. If we have |
|
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3009 // a speculative type use it to perform an exact cast. |
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3010 ciKlass* spec_obj_type = obj_type->speculative_type(); |
|
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|
3011 if (spec_obj_type != NULL || |
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|
3012 (data != NULL && |
|
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|
3013 // Counter has never been decremented (due to cast failure). |
|
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3014 // ...This is a reasonable thing to expect. It is true of |
|
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|
3015 // all casts inserted by javac to implement generic types. |
|
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|
3016 data->as_CounterData()->count() >= 0)) { |
|
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3017 cast_obj = maybe_cast_profiled_receiver(not_null_obj, tk->klass(), spec_obj_type, safe_for_replace); |
|
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|
3018 if (cast_obj != NULL) { |
|
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3019 if (failure_control != NULL) // failure is now impossible |
|
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|
3020 (*failure_control) = top(); |
|
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|
3021 // adjust the type of the phi to the exact klass: |
|
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|
3022 phi->raise_bottom_type(_gvn.type(cast_obj)->meet_speculative(TypePtr::NULL_PTR)); |
|
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|
3023 } |
| 0 | 3024 } |
| 3025 } | |
| 3026 | |
| 3027 if (cast_obj == NULL) { | |
| 3028 // Load the object's klass | |
| 3029 Node* obj_klass = load_object_klass(not_null_obj); | |
| 3030 | |
| 3031 // Generate the subtype check | |
| 3032 Node* not_subtype_ctrl = gen_subtype_check( obj_klass, superklass ); | |
| 3033 | |
| 3034 // Plug in success path into the merge | |
|
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|
3035 cast_obj = _gvn.transform(new (C) CheckCastPPNode(control(), |
| 0 | 3036 not_null_obj, toop)); |
| 3037 // Failure path ends in uncommon trap (or may be dead - failure impossible) | |
| 3038 if (failure_control == NULL) { | |
| 3039 if (not_subtype_ctrl != top()) { // If failure is possible | |
| 3040 PreserveJVMState pjvms(this); | |
| 3041 set_control(not_subtype_ctrl); | |
| 3042 builtin_throw(Deoptimization::Reason_class_check, obj_klass); | |
| 3043 } | |
| 3044 } else { | |
| 3045 (*failure_control) = not_subtype_ctrl; | |
| 3046 } | |
| 3047 } | |
| 3048 | |
| 3049 region->init_req(_obj_path, control()); | |
| 3050 phi ->init_req(_obj_path, cast_obj); | |
| 3051 | |
| 3052 // A merge of NULL or Casted-NotNull obj | |
| 3053 Node* res = _gvn.transform(phi); | |
| 3054 | |
| 3055 // Note I do NOT always 'replace_in_map(obj,result)' here. | |
| 3056 // if( tk->klass()->can_be_primary_super() ) | |
| 3057 // This means that if I successfully store an Object into an array-of-String | |
| 3058 // I 'forget' that the Object is really now known to be a String. I have to | |
| 3059 // do this because we don't have true union types for interfaces - if I store | |
| 3060 // a Baz into an array-of-Interface and then tell the optimizer it's an | |
| 3061 // Interface, I forget that it's also a Baz and cannot do Baz-like field | |
| 3062 // references to it. FIX THIS WHEN UNION TYPES APPEAR! | |
| 3063 // replace_in_map( obj, res ); | |
| 3064 | |
| 3065 // Return final merged results | |
| 3066 set_control( _gvn.transform(region) ); | |
| 3067 record_for_igvn(region); | |
| 3068 return res; | |
| 3069 } | |
| 3070 | |
| 3071 //------------------------------next_monitor----------------------------------- | |
| 3072 // What number should be given to the next monitor? | |
| 3073 int GraphKit::next_monitor() { | |
| 3074 int current = jvms()->monitor_depth()* C->sync_stack_slots(); | |
| 3075 int next = current + C->sync_stack_slots(); | |
| 3076 // Keep the toplevel high water mark current: | |
| 3077 if (C->fixed_slots() < next) C->set_fixed_slots(next); | |
| 3078 return current; | |
| 3079 } | |
| 3080 | |
| 3081 //------------------------------insert_mem_bar--------------------------------- | |
| 3082 // Memory barrier to avoid floating things around | |
| 3083 // The membar serves as a pinch point between both control and all memory slices. | |
| 3084 Node* GraphKit::insert_mem_bar(int opcode, Node* precedent) { | |
| 3085 MemBarNode* mb = MemBarNode::make(C, opcode, Compile::AliasIdxBot, precedent); | |
| 3086 mb->init_req(TypeFunc::Control, control()); | |
| 3087 mb->init_req(TypeFunc::Memory, reset_memory()); | |
| 3088 Node* membar = _gvn.transform(mb); | |
|
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3089 set_control(_gvn.transform(new (C) ProjNode(membar, TypeFunc::Control))); |
| 0 | 3090 set_all_memory_call(membar); |
| 3091 return membar; | |
| 3092 } | |
| 3093 | |
| 3094 //-------------------------insert_mem_bar_volatile---------------------------- | |
| 3095 // Memory barrier to avoid floating things around | |
| 3096 // The membar serves as a pinch point between both control and memory(alias_idx). | |
| 3097 // If you want to make a pinch point on all memory slices, do not use this | |
| 3098 // function (even with AliasIdxBot); use insert_mem_bar() instead. | |
| 3099 Node* GraphKit::insert_mem_bar_volatile(int opcode, int alias_idx, Node* precedent) { | |
| 3100 // When Parse::do_put_xxx updates a volatile field, it appends a series | |
| 3101 // of MemBarVolatile nodes, one for *each* volatile field alias category. | |
| 3102 // The first membar is on the same memory slice as the field store opcode. | |
| 3103 // This forces the membar to follow the store. (Bug 6500685 broke this.) | |
| 3104 // All the other membars (for other volatile slices, including AliasIdxBot, | |
| 3105 // which stands for all unknown volatile slices) are control-dependent | |
| 3106 // on the first membar. This prevents later volatile loads or stores | |
| 3107 // from sliding up past the just-emitted store. | |
| 3108 | |
| 3109 MemBarNode* mb = MemBarNode::make(C, opcode, alias_idx, precedent); | |
| 3110 mb->set_req(TypeFunc::Control,control()); | |
| 3111 if (alias_idx == Compile::AliasIdxBot) { | |
| 3112 mb->set_req(TypeFunc::Memory, merged_memory()->base_memory()); | |
| 3113 } else { | |
| 3114 assert(!(opcode == Op_Initialize && alias_idx != Compile::AliasIdxRaw), "fix caller"); | |
| 3115 mb->set_req(TypeFunc::Memory, memory(alias_idx)); | |
| 3116 } | |
| 3117 Node* membar = _gvn.transform(mb); | |
|
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3118 set_control(_gvn.transform(new (C) ProjNode(membar, TypeFunc::Control))); |
| 0 | 3119 if (alias_idx == Compile::AliasIdxBot) { |
|
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|
3120 merged_memory()->set_base_memory(_gvn.transform(new (C) ProjNode(membar, TypeFunc::Memory))); |
| 0 | 3121 } else { |
|
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|
3122 set_memory(_gvn.transform(new (C) ProjNode(membar, TypeFunc::Memory)),alias_idx); |
| 0 | 3123 } |
| 3124 return membar; | |
| 3125 } | |
| 3126 | |
| 3127 //------------------------------shared_lock------------------------------------ | |
| 3128 // Emit locking code. | |
| 3129 FastLockNode* GraphKit::shared_lock(Node* obj) { | |
| 3130 // bci is either a monitorenter bc or InvocationEntryBci | |
| 3131 // %%% SynchronizationEntryBCI is redundant; use InvocationEntryBci in interfaces | |
| 3132 assert(SynchronizationEntryBCI == InvocationEntryBci, ""); | |
| 3133 | |
| 3134 if( !GenerateSynchronizationCode ) | |
| 3135 return NULL; // Not locking things? | |
| 3136 if (stopped()) // Dead monitor? | |
| 3137 return NULL; | |
| 3138 | |
| 3139 assert(dead_locals_are_killed(), "should kill locals before sync. point"); | |
| 3140 | |
| 3141 // Box the stack location | |
|
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|
3142 Node* box = _gvn.transform(new (C) BoxLockNode(next_monitor())); |
| 0 | 3143 Node* mem = reset_memory(); |
| 3144 | |
|
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|
3145 FastLockNode * flock = _gvn.transform(new (C) FastLockNode(0, obj, box) )->as_FastLock(); |
| 0 | 3146 if (PrintPreciseBiasedLockingStatistics) { |
| 3147 // Create the counters for this fast lock. | |
| 3148 flock->create_lock_counter(sync_jvms()); // sync_jvms used to get current bci | |
| 3149 } | |
| 3150 // Add monitor to debug info for the slow path. If we block inside the | |
| 3151 // slow path and de-opt, we need the monitor hanging around | |
| 3152 map()->push_monitor( flock ); | |
| 3153 | |
| 3154 const TypeFunc *tf = LockNode::lock_type(); | |
|
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3155 LockNode *lock = new (C) LockNode(C, tf); |
| 0 | 3156 |
| 3157 lock->init_req( TypeFunc::Control, control() ); | |
| 3158 lock->init_req( TypeFunc::Memory , mem ); | |
| 3159 lock->init_req( TypeFunc::I_O , top() ) ; // does no i/o | |
| 3160 lock->init_req( TypeFunc::FramePtr, frameptr() ); | |
| 3161 lock->init_req( TypeFunc::ReturnAdr, top() ); | |
| 3162 | |
| 3163 lock->init_req(TypeFunc::Parms + 0, obj); | |
| 3164 lock->init_req(TypeFunc::Parms + 1, box); | |
| 3165 lock->init_req(TypeFunc::Parms + 2, flock); | |
| 3166 add_safepoint_edges(lock); | |
| 3167 | |
| 3168 lock = _gvn.transform( lock )->as_Lock(); | |
| 3169 | |
| 3170 // lock has no side-effects, sets few values | |
| 3171 set_predefined_output_for_runtime_call(lock, mem, TypeRawPtr::BOTTOM); | |
| 3172 | |
|
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|
3173 insert_mem_bar(Op_MemBarAcquireLock); |
| 0 | 3174 |
| 3175 // Add this to the worklist so that the lock can be eliminated | |
| 3176 record_for_igvn(lock); | |
| 3177 | |
| 3178 #ifndef PRODUCT | |
| 3179 if (PrintLockStatistics) { | |
| 3180 // Update the counter for this lock. Don't bother using an atomic | |
| 3181 // operation since we don't require absolute accuracy. | |
| 3182 lock->create_lock_counter(map()->jvms()); | |
| 1609 | 3183 increment_counter(lock->counter()->addr()); |
| 0 | 3184 } |
| 3185 #endif | |
| 3186 | |
| 3187 return flock; | |
| 3188 } | |
| 3189 | |
| 3190 | |
| 3191 //------------------------------shared_unlock---------------------------------- | |
| 3192 // Emit unlocking code. | |
| 3193 void GraphKit::shared_unlock(Node* box, Node* obj) { | |
| 3194 // bci is either a monitorenter bc or InvocationEntryBci | |
| 3195 // %%% SynchronizationEntryBCI is redundant; use InvocationEntryBci in interfaces | |
| 3196 assert(SynchronizationEntryBCI == InvocationEntryBci, ""); | |
| 3197 | |
| 3198 if( !GenerateSynchronizationCode ) | |
| 3199 return; | |
| 3200 if (stopped()) { // Dead monitor? | |
| 3201 map()->pop_monitor(); // Kill monitor from debug info | |
| 3202 return; | |
| 3203 } | |
| 3204 | |
| 3205 // Memory barrier to avoid floating things down past the locked region | |
|
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|
3206 insert_mem_bar(Op_MemBarReleaseLock); |
| 0 | 3207 |
| 3208 const TypeFunc *tf = OptoRuntime::complete_monitor_exit_Type(); | |
|
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|
3209 UnlockNode *unlock = new (C) UnlockNode(C, tf); |
| 0 | 3210 uint raw_idx = Compile::AliasIdxRaw; |
| 3211 unlock->init_req( TypeFunc::Control, control() ); | |
| 3212 unlock->init_req( TypeFunc::Memory , memory(raw_idx) ); | |
| 3213 unlock->init_req( TypeFunc::I_O , top() ) ; // does no i/o | |
| 3214 unlock->init_req( TypeFunc::FramePtr, frameptr() ); | |
| 3215 unlock->init_req( TypeFunc::ReturnAdr, top() ); | |
| 3216 | |
| 3217 unlock->init_req(TypeFunc::Parms + 0, obj); | |
| 3218 unlock->init_req(TypeFunc::Parms + 1, box); | |
| 3219 unlock = _gvn.transform(unlock)->as_Unlock(); | |
| 3220 | |
| 3221 Node* mem = reset_memory(); | |
| 3222 | |
| 3223 // unlock has no side-effects, sets few values | |
| 3224 set_predefined_output_for_runtime_call(unlock, mem, TypeRawPtr::BOTTOM); | |
| 3225 | |
| 3226 // Kill monitor from debug info | |
| 3227 map()->pop_monitor( ); | |
| 3228 } | |
| 3229 | |
| 3230 //-------------------------------get_layout_helper----------------------------- | |
| 3231 // If the given klass is a constant or known to be an array, | |
| 3232 // fetch the constant layout helper value into constant_value | |
| 3233 // and return (Node*)NULL. Otherwise, load the non-constant | |
| 3234 // layout helper value, and return the node which represents it. | |
| 3235 // This two-faced routine is useful because allocation sites | |
| 3236 // almost always feature constant types. | |
| 3237 Node* GraphKit::get_layout_helper(Node* klass_node, jint& constant_value) { | |
| 3238 const TypeKlassPtr* inst_klass = _gvn.type(klass_node)->isa_klassptr(); | |
| 3239 if (!StressReflectiveCode && inst_klass != NULL) { | |
| 3240 ciKlass* klass = inst_klass->klass(); | |
| 3241 bool xklass = inst_klass->klass_is_exact(); | |
| 3242 if (xklass || klass->is_array_klass()) { | |
| 3243 jint lhelper = klass->layout_helper(); | |
| 3244 if (lhelper != Klass::_lh_neutral_value) { | |
| 3245 constant_value = lhelper; | |
| 3246 return (Node*) NULL; | |
| 3247 } | |
| 3248 } | |
| 3249 } | |
| 3250 constant_value = Klass::_lh_neutral_value; // put in a known value | |
|
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|
3251 Node* lhp = basic_plus_adr(klass_node, klass_node, in_bytes(Klass::layout_helper_offset())); |
| 0 | 3252 return make_load(NULL, lhp, TypeInt::INT, T_INT); |
| 3253 } | |
| 3254 | |
| 3255 // We just put in an allocate/initialize with a big raw-memory effect. | |
| 3256 // Hook selected additional alias categories on the initialization. | |
| 3257 static void hook_memory_on_init(GraphKit& kit, int alias_idx, | |
| 3258 MergeMemNode* init_in_merge, | |
| 3259 Node* init_out_raw) { | |
| 3260 DEBUG_ONLY(Node* init_in_raw = init_in_merge->base_memory()); | |
| 3261 assert(init_in_merge->memory_at(alias_idx) == init_in_raw, ""); | |
| 3262 | |
| 3263 Node* prevmem = kit.memory(alias_idx); | |
| 3264 init_in_merge->set_memory_at(alias_idx, prevmem); | |
| 3265 kit.set_memory(init_out_raw, alias_idx); | |
| 3266 } | |
| 3267 | |
| 3268 //---------------------------set_output_for_allocation------------------------- | |
| 3269 Node* GraphKit::set_output_for_allocation(AllocateNode* alloc, | |
|
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|
3270 const TypeOopPtr* oop_type) { |
| 0 | 3271 int rawidx = Compile::AliasIdxRaw; |
| 3272 alloc->set_req( TypeFunc::FramePtr, frameptr() ); | |
| 3273 add_safepoint_edges(alloc); | |
| 3274 Node* allocx = _gvn.transform(alloc); | |
|
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|
3275 set_control( _gvn.transform(new (C) ProjNode(allocx, TypeFunc::Control) ) ); |
| 0 | 3276 // create memory projection for i_o |
|
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|
3277 set_memory ( _gvn.transform( new (C) ProjNode(allocx, TypeFunc::Memory, true) ), rawidx ); |
|
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|
3278 make_slow_call_ex(allocx, env()->Throwable_klass(), true); |
| 0 | 3279 |
| 3280 // create a memory projection as for the normal control path | |
|
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|
3281 Node* malloc = _gvn.transform(new (C) ProjNode(allocx, TypeFunc::Memory)); |
| 0 | 3282 set_memory(malloc, rawidx); |
| 3283 | |
| 3284 // a normal slow-call doesn't change i_o, but an allocation does | |
| 3285 // we create a separate i_o projection for the normal control path | |
|
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|
3286 set_i_o(_gvn.transform( new (C) ProjNode(allocx, TypeFunc::I_O, false) ) ); |
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|
3287 Node* rawoop = _gvn.transform( new (C) ProjNode(allocx, TypeFunc::Parms) ); |
| 0 | 3288 |
| 3289 // put in an initialization barrier | |
| 3290 InitializeNode* init = insert_mem_bar_volatile(Op_Initialize, rawidx, | |
| 3291 rawoop)->as_Initialize(); | |
| 3292 assert(alloc->initialization() == init, "2-way macro link must work"); | |
| 3293 assert(init ->allocation() == alloc, "2-way macro link must work"); | |
|
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|
3294 { |
| 0 | 3295 // Extract memory strands which may participate in the new object's |
| 3296 // initialization, and source them from the new InitializeNode. | |
| 3297 // This will allow us to observe initializations when they occur, | |
| 3298 // and link them properly (as a group) to the InitializeNode. | |
| 3299 assert(init->in(InitializeNode::Memory) == malloc, ""); | |
| 3300 MergeMemNode* minit_in = MergeMemNode::make(C, malloc); | |
| 3301 init->set_req(InitializeNode::Memory, minit_in); | |
| 3302 record_for_igvn(minit_in); // fold it up later, if possible | |
| 3303 Node* minit_out = memory(rawidx); | |
| 3304 assert(minit_out->is_Proj() && minit_out->in(0) == init, ""); | |
| 3305 if (oop_type->isa_aryptr()) { | |
| 3306 const TypePtr* telemref = oop_type->add_offset(Type::OffsetBot); | |
| 3307 int elemidx = C->get_alias_index(telemref); | |
| 3308 hook_memory_on_init(*this, elemidx, minit_in, minit_out); | |
| 3309 } else if (oop_type->isa_instptr()) { | |
| 3310 ciInstanceKlass* ik = oop_type->klass()->as_instance_klass(); | |
| 3311 for (int i = 0, len = ik->nof_nonstatic_fields(); i < len; i++) { | |
| 3312 ciField* field = ik->nonstatic_field_at(i); | |
|
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diff
changeset
|
3313 if (field->offset() >= TrackedInitializationLimit * HeapWordSize) |
| 0 | 3314 continue; // do not bother to track really large numbers of fields |
| 3315 // Find (or create) the alias category for this field: | |
| 3316 int fieldidx = C->alias_type(field)->index(); | |
| 3317 hook_memory_on_init(*this, fieldidx, minit_in, minit_out); | |
| 3318 } | |
| 3319 } | |
| 3320 } | |
| 3321 | |
| 3322 // Cast raw oop to the real thing... | |
|
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|
3323 Node* javaoop = new (C) CheckCastPPNode(control(), rawoop, oop_type); |
| 0 | 3324 javaoop = _gvn.transform(javaoop); |
| 3325 C->set_recent_alloc(control(), javaoop); | |
| 3326 assert(just_allocated_object(control()) == javaoop, "just allocated"); | |
| 3327 | |
| 3328 #ifdef ASSERT | |
|
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|
3329 { // Verify that the AllocateNode::Ideal_allocation recognizers work: |
|
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|
3330 assert(AllocateNode::Ideal_allocation(rawoop, &_gvn) == alloc, |
|
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|
3331 "Ideal_allocation works"); |
|
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|
3332 assert(AllocateNode::Ideal_allocation(javaoop, &_gvn) == alloc, |
|
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|
3333 "Ideal_allocation works"); |
| 0 | 3334 if (alloc->is_AllocateArray()) { |
|
366
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|
3335 assert(AllocateArrayNode::Ideal_array_allocation(rawoop, &_gvn) == alloc->as_AllocateArray(), |
|
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|
3336 "Ideal_allocation works"); |
|
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|
3337 assert(AllocateArrayNode::Ideal_array_allocation(javaoop, &_gvn) == alloc->as_AllocateArray(), |
|
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|
3338 "Ideal_allocation works"); |
| 0 | 3339 } else { |
|
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|
3340 assert(alloc->in(AllocateNode::ALength)->is_top(), "no length, please"); |
| 0 | 3341 } |
| 3342 } | |
| 3343 #endif //ASSERT | |
| 3344 | |
| 3345 return javaoop; | |
| 3346 } | |
| 3347 | |
| 3348 //---------------------------new_instance-------------------------------------- | |
| 3349 // This routine takes a klass_node which may be constant (for a static type) | |
| 3350 // or may be non-constant (for reflective code). It will work equally well | |
| 3351 // for either, and the graph will fold nicely if the optimizer later reduces | |
| 3352 // the type to a constant. | |
| 3353 // The optional arguments are for specialized use by intrinsics: | |
| 3354 // - If 'extra_slow_test' if not null is an extra condition for the slow-path. | |
| 3355 // - If 'return_size_val', report the the total object size to the caller. | |
| 3356 Node* GraphKit::new_instance(Node* klass_node, | |
| 3357 Node* extra_slow_test, | |
| 3358 Node* *return_size_val) { | |
| 3359 // Compute size in doublewords | |
| 3360 // The size is always an integral number of doublewords, represented | |
| 3361 // as a positive bytewise size stored in the klass's layout_helper. | |
| 3362 // The layout_helper also encodes (in a low bit) the need for a slow path. | |
| 3363 jint layout_con = Klass::_lh_neutral_value; | |
| 3364 Node* layout_val = get_layout_helper(klass_node, layout_con); | |
| 3365 int layout_is_con = (layout_val == NULL); | |
| 3366 | |
| 3367 if (extra_slow_test == NULL) extra_slow_test = intcon(0); | |
| 3368 // Generate the initial go-slow test. It's either ALWAYS (return a | |
| 3369 // Node for 1) or NEVER (return a NULL) or perhaps (in the reflective | |
| 3370 // case) a computed value derived from the layout_helper. | |
| 3371 Node* initial_slow_test = NULL; | |
| 3372 if (layout_is_con) { | |
| 3373 assert(!StressReflectiveCode, "stress mode does not use these paths"); | |
| 3374 bool must_go_slow = Klass::layout_helper_needs_slow_path(layout_con); | |
| 3375 initial_slow_test = must_go_slow? intcon(1): extra_slow_test; | |
| 3376 | |
| 3377 } else { // reflective case | |
| 3378 // This reflective path is used by Unsafe.allocateInstance. | |
| 3379 // (It may be stress-tested by specifying StressReflectiveCode.) | |
| 3380 // Basically, we want to get into the VM is there's an illegal argument. | |
| 3381 Node* bit = intcon(Klass::_lh_instance_slow_path_bit); | |
|
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|
3382 initial_slow_test = _gvn.transform( new (C) AndINode(layout_val, bit) ); |
| 0 | 3383 if (extra_slow_test != intcon(0)) { |
|
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|
3384 initial_slow_test = _gvn.transform( new (C) OrINode(initial_slow_test, extra_slow_test) ); |
| 0 | 3385 } |
| 3386 // (Macro-expander will further convert this to a Bool, if necessary.) | |
| 3387 } | |
| 3388 | |
| 3389 // Find the size in bytes. This is easy; it's the layout_helper. | |
| 3390 // The size value must be valid even if the slow path is taken. | |
| 3391 Node* size = NULL; | |
| 3392 if (layout_is_con) { | |
| 3393 size = MakeConX(Klass::layout_helper_size_in_bytes(layout_con)); | |
| 3394 } else { // reflective case | |
| 3395 // This reflective path is used by clone and Unsafe.allocateInstance. | |
| 3396 size = ConvI2X(layout_val); | |
| 3397 | |
| 3398 // Clear the low bits to extract layout_helper_size_in_bytes: | |
| 3399 assert((int)Klass::_lh_instance_slow_path_bit < BytesPerLong, "clear bit"); | |
| 3400 Node* mask = MakeConX(~ (intptr_t)right_n_bits(LogBytesPerLong)); | |
|
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changeset
|
3401 size = _gvn.transform( new (C) AndXNode(size, mask) ); |
| 0 | 3402 } |
| 3403 if (return_size_val != NULL) { | |
| 3404 (*return_size_val) = size; | |
| 3405 } | |
| 3406 | |
| 3407 // This is a precise notnull oop of the klass. | |
| 3408 // (Actually, it need not be precise if this is a reflective allocation.) | |
| 3409 // It's what we cast the result to. | |
| 3410 const TypeKlassPtr* tklass = _gvn.type(klass_node)->isa_klassptr(); | |
| 3411 if (!tklass) tklass = TypeKlassPtr::OBJECT; | |
| 3412 const TypeOopPtr* oop_type = tklass->as_instance_type(); | |
| 3413 | |
| 3414 // Now generate allocation code | |
|
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|
3415 |
|
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|
3416 // The entire memory state is needed for slow path of the allocation |
|
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|
3417 // since GC and deoptimization can happened. |
|
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|
3418 Node *mem = reset_memory(); |
|
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|
3419 set_all_memory(mem); // Create new memory state |
|
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3420 |
| 0 | 3421 AllocateNode* alloc |
| 10278 | 3422 = new (C) AllocateNode(C, AllocateNode::alloc_type(Type::TOP), |
|
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|
3423 control(), mem, i_o(), |
|
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|
3424 size, klass_node, |
|
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|
3425 initial_slow_test); |
| 0 | 3426 |
|
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|
3427 return set_output_for_allocation(alloc, oop_type); |
| 0 | 3428 } |
| 3429 | |
| 3430 //-------------------------------new_array------------------------------------- | |
| 3431 // helper for both newarray and anewarray | |
| 3432 // The 'length' parameter is (obviously) the length of the array. | |
| 3433 // See comments on new_instance for the meaning of the other arguments. | |
| 3434 Node* GraphKit::new_array(Node* klass_node, // array klass (maybe variable) | |
| 3435 Node* length, // number of array elements | |
|
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|
3436 int nargs, // number of arguments to push back for uncommon trap |
| 0 | 3437 Node* *return_size_val) { |
| 3438 jint layout_con = Klass::_lh_neutral_value; | |
| 3439 Node* layout_val = get_layout_helper(klass_node, layout_con); | |
| 3440 int layout_is_con = (layout_val == NULL); | |
| 3441 | |
| 3442 if (!layout_is_con && !StressReflectiveCode && | |
| 3443 !too_many_traps(Deoptimization::Reason_class_check)) { | |
| 3444 // This is a reflective array creation site. | |
| 3445 // Optimistically assume that it is a subtype of Object[], | |
| 3446 // so that we can fold up all the address arithmetic. | |
| 3447 layout_con = Klass::array_layout_helper(T_OBJECT); | |
|
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|
3448 Node* cmp_lh = _gvn.transform( new(C) CmpINode(layout_val, intcon(layout_con)) ); |
|
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|
3449 Node* bol_lh = _gvn.transform( new(C) BoolNode(cmp_lh, BoolTest::eq) ); |
| 0 | 3450 { BuildCutout unless(this, bol_lh, PROB_MAX); |
|
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diff
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|
3451 inc_sp(nargs); |
| 0 | 3452 uncommon_trap(Deoptimization::Reason_class_check, |
| 3453 Deoptimization::Action_maybe_recompile); | |
| 3454 } | |
| 3455 layout_val = NULL; | |
| 3456 layout_is_con = true; | |
| 3457 } | |
| 3458 | |
| 3459 // Generate the initial go-slow test. Make sure we do not overflow | |
| 3460 // if length is huge (near 2Gig) or negative! We do not need | |
| 3461 // exact double-words here, just a close approximation of needed | |
| 3462 // double-words. We can't add any offset or rounding bits, lest we | |
| 3463 // take a size -1 of bytes and make it positive. Use an unsigned | |
| 3464 // compare, so negative sizes look hugely positive. | |
| 3465 int fast_size_limit = FastAllocateSizeLimit; | |
| 3466 if (layout_is_con) { | |
| 3467 assert(!StressReflectiveCode, "stress mode does not use these paths"); | |
| 3468 // Increase the size limit if we have exact knowledge of array type. | |
| 3469 int log2_esize = Klass::layout_helper_log2_element_size(layout_con); | |
| 3470 fast_size_limit <<= (LogBytesPerLong - log2_esize); | |
| 3471 } | |
| 3472 | |
|
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
3473 Node* initial_slow_cmp = _gvn.transform( new (C) CmpUNode( length, intcon( fast_size_limit ) ) ); |
|
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
3474 Node* initial_slow_test = _gvn.transform( new (C) BoolNode( initial_slow_cmp, BoolTest::gt ) ); |
| 0 | 3475 if (initial_slow_test->is_Bool()) { |
| 3476 // Hide it behind a CMoveI, or else PhaseIdealLoop::split_up will get sick. | |
| 3477 initial_slow_test = initial_slow_test->as_Bool()->as_int_value(&_gvn); | |
| 3478 } | |
| 3479 | |
| 3480 // --- Size Computation --- | |
| 3481 // array_size = round_to_heap(array_header + (length << elem_shift)); | |
| 3482 // where round_to_heap(x) == round_to(x, MinObjAlignmentInBytes) | |
| 3483 // and round_to(x, y) == ((x + y-1) & ~(y-1)) | |
| 3484 // The rounding mask is strength-reduced, if possible. | |
| 3485 int round_mask = MinObjAlignmentInBytes - 1; | |
| 3486 Node* header_size = NULL; | |
| 3487 int header_size_min = arrayOopDesc::base_offset_in_bytes(T_BYTE); | |
| 3488 // (T_BYTE has the weakest alignment and size restrictions...) | |
| 3489 if (layout_is_con) { | |
| 3490 int hsize = Klass::layout_helper_header_size(layout_con); | |
| 3491 int eshift = Klass::layout_helper_log2_element_size(layout_con); | |
| 3492 BasicType etype = Klass::layout_helper_element_type(layout_con); | |
| 3493 if ((round_mask & ~right_n_bits(eshift)) == 0) | |
| 3494 round_mask = 0; // strength-reduce it if it goes away completely | |
| 3495 assert((hsize & right_n_bits(eshift)) == 0, "hsize is pre-rounded"); | |
| 3496 assert(header_size_min <= hsize, "generic minimum is smallest"); | |
| 3497 header_size_min = hsize; | |
| 3498 header_size = intcon(hsize + round_mask); | |
| 3499 } else { | |
| 3500 Node* hss = intcon(Klass::_lh_header_size_shift); | |
| 3501 Node* hsm = intcon(Klass::_lh_header_size_mask); | |
|
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
3502 Node* hsize = _gvn.transform( new(C) URShiftINode(layout_val, hss) ); |
|
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
3503 hsize = _gvn.transform( new(C) AndINode(hsize, hsm) ); |
| 0 | 3504 Node* mask = intcon(round_mask); |
|
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
3505 header_size = _gvn.transform( new(C) AddINode(hsize, mask) ); |
| 0 | 3506 } |
| 3507 | |
| 3508 Node* elem_shift = NULL; | |
| 3509 if (layout_is_con) { | |
| 3510 int eshift = Klass::layout_helper_log2_element_size(layout_con); | |
| 3511 if (eshift != 0) | |
| 3512 elem_shift = intcon(eshift); | |
| 3513 } else { | |
| 3514 // There is no need to mask or shift this value. | |
| 3515 // The semantics of LShiftINode include an implicit mask to 0x1F. | |
| 3516 assert(Klass::_lh_log2_element_size_shift == 0, "use shift in place"); | |
| 3517 elem_shift = layout_val; | |
| 3518 } | |
| 3519 | |
| 3520 // Transition to native address size for all offset calculations: | |
| 3521 Node* lengthx = ConvI2X(length); | |
| 3522 Node* headerx = ConvI2X(header_size); | |
| 3523 #ifdef _LP64 | |
| 3524 { const TypeLong* tllen = _gvn.find_long_type(lengthx); | |
| 3525 if (tllen != NULL && tllen->_lo < 0) { | |
| 3526 // Add a manual constraint to a positive range. Cf. array_element_address. | |
| 3527 jlong size_max = arrayOopDesc::max_array_length(T_BYTE); | |
| 3528 if (size_max > tllen->_hi) size_max = tllen->_hi; | |
| 3529 const TypeLong* tlcon = TypeLong::make(CONST64(0), size_max, Type::WidenMin); | |
|
6804
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7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
3530 lengthx = _gvn.transform( new (C) ConvI2LNode(length, tlcon)); |
| 0 | 3531 } |
| 3532 } | |
| 3533 #endif | |
| 3534 | |
| 3535 // Combine header size (plus rounding) and body size. Then round down. | |
| 3536 // This computation cannot overflow, because it is used only in two | |
| 3537 // places, one where the length is sharply limited, and the other | |
| 3538 // after a successful allocation. | |
| 3539 Node* abody = lengthx; | |
| 3540 if (elem_shift != NULL) | |
|
6804
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7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
3541 abody = _gvn.transform( new(C) LShiftXNode(lengthx, elem_shift) ); |
|
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
3542 Node* size = _gvn.transform( new(C) AddXNode(headerx, abody) ); |
| 0 | 3543 if (round_mask != 0) { |
| 3544 Node* mask = MakeConX(~round_mask); | |
|
6804
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7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
3545 size = _gvn.transform( new(C) AndXNode(size, mask) ); |
| 0 | 3546 } |
| 3547 // else if round_mask == 0, the size computation is self-rounding | |
| 3548 | |
| 3549 if (return_size_val != NULL) { | |
| 3550 // This is the size | |
| 3551 (*return_size_val) = size; | |
| 3552 } | |
| 3553 | |
| 3554 // Now generate allocation code | |
|
74
2a9af0b9cb1c
6674600: (Escape Analysis) Optimize memory graph for instance's fields
kvn
parents:
63
diff
changeset
|
3555 |
|
565
7fe62bb75bf4
6799693: Server compiler leads to data corruption when expression throws an Exception
kvn
parents:
563
diff
changeset
|
3556 // The entire memory state is needed for slow path of the allocation |
|
7fe62bb75bf4
6799693: Server compiler leads to data corruption when expression throws an Exception
kvn
parents:
563
diff
changeset
|
3557 // since GC and deoptimization can happened. |
|
7fe62bb75bf4
6799693: Server compiler leads to data corruption when expression throws an Exception
kvn
parents:
563
diff
changeset
|
3558 Node *mem = reset_memory(); |
|
7fe62bb75bf4
6799693: Server compiler leads to data corruption when expression throws an Exception
kvn
parents:
563
diff
changeset
|
3559 set_all_memory(mem); // Create new memory state |
|
74
2a9af0b9cb1c
6674600: (Escape Analysis) Optimize memory graph for instance's fields
kvn
parents:
63
diff
changeset
|
3560 |
| 0 | 3561 // Create the AllocateArrayNode and its result projections |
| 3562 AllocateArrayNode* alloc | |
| 10278 | 3563 = new (C) AllocateArrayNode(C, AllocateArrayNode::alloc_type(TypeInt::INT), |
|
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
3564 control(), mem, i_o(), |
|
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
3565 size, klass_node, |
|
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
3566 initial_slow_test, |
|
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
3567 length); |
| 0 | 3568 |
| 3569 // Cast to correct type. Note that the klass_node may be constant or not, | |
| 3570 // and in the latter case the actual array type will be inexact also. | |
| 3571 // (This happens via a non-constant argument to inline_native_newArray.) | |
| 3572 // In any case, the value of klass_node provides the desired array type. | |
| 3573 const TypeInt* length_type = _gvn.find_int_type(length); | |
| 3574 const TypeOopPtr* ary_type = _gvn.type(klass_node)->is_klassptr()->as_instance_type(); | |
| 3575 if (ary_type->isa_aryptr() && length_type != NULL) { | |
| 3576 // Try to get a better type than POS for the size | |
| 3577 ary_type = ary_type->is_aryptr()->cast_to_size(length_type); | |
| 3578 } | |
| 3579 | |
|
3278
66b0e2371912
7026700: regression in 6u24-rev-b23: Crash in C2 compiler in PhaseIdealLoop::build_loop_late_post
kvn
parents:
2468
diff
changeset
|
3580 Node* javaoop = set_output_for_allocation(alloc, ary_type); |
| 0 | 3581 |
|
366
8261ee795323
6711100: 64bit fastdebug server vm crashes with assert(_base == Int,"Not an Int")
rasbold
parents:
332
diff
changeset
|
3582 // Cast length on remaining path to be as narrow as possible |
|
8261ee795323
6711100: 64bit fastdebug server vm crashes with assert(_base == Int,"Not an Int")
rasbold
parents:
332
diff
changeset
|
3583 if (map()->find_edge(length) >= 0) { |
|
8261ee795323
6711100: 64bit fastdebug server vm crashes with assert(_base == Int,"Not an Int")
rasbold
parents:
332
diff
changeset
|
3584 Node* ccast = alloc->make_ideal_length(ary_type, &_gvn); |
|
8261ee795323
6711100: 64bit fastdebug server vm crashes with assert(_base == Int,"Not an Int")
rasbold
parents:
332
diff
changeset
|
3585 if (ccast != length) { |
|
8261ee795323
6711100: 64bit fastdebug server vm crashes with assert(_base == Int,"Not an Int")
rasbold
parents:
332
diff
changeset
|
3586 _gvn.set_type_bottom(ccast); |
|
8261ee795323
6711100: 64bit fastdebug server vm crashes with assert(_base == Int,"Not an Int")
rasbold
parents:
332
diff
changeset
|
3587 record_for_igvn(ccast); |
| 0 | 3588 replace_in_map(length, ccast); |
| 3589 } | |
| 3590 } | |
| 3591 | |
| 3592 return javaoop; | |
| 3593 } | |
| 3594 | |
| 3595 // The following "Ideal_foo" functions are placed here because they recognize | |
| 3596 // the graph shapes created by the functions immediately above. | |
| 3597 | |
| 3598 //---------------------------Ideal_allocation---------------------------------- | |
| 3599 // Given an oop pointer or raw pointer, see if it feeds from an AllocateNode. | |
| 3600 AllocateNode* AllocateNode::Ideal_allocation(Node* ptr, PhaseTransform* phase) { | |
| 3601 if (ptr == NULL) { // reduce dumb test in callers | |
| 3602 return NULL; | |
| 3603 } | |
|
11078
2b3fe74309b6
8019247: SIGSEGV in compiled method c8e.e.t_.getArray(Ljava/lang/Class;)[Ljava/lang/Object
kvn
parents:
10278
diff
changeset
|
3604 if (ptr->is_CheckCastPP()) { // strip only one raw-to-oop cast |
|
2b3fe74309b6
8019247: SIGSEGV in compiled method c8e.e.t_.getArray(Ljava/lang/Class;)[Ljava/lang/Object
kvn
parents:
10278
diff
changeset
|
3605 ptr = ptr->in(1); |
|
2b3fe74309b6
8019247: SIGSEGV in compiled method c8e.e.t_.getArray(Ljava/lang/Class;)[Ljava/lang/Object
kvn
parents:
10278
diff
changeset
|
3606 if (ptr == NULL) return NULL; |
|
2b3fe74309b6
8019247: SIGSEGV in compiled method c8e.e.t_.getArray(Ljava/lang/Class;)[Ljava/lang/Object
kvn
parents:
10278
diff
changeset
|
3607 } |
|
2b3fe74309b6
8019247: SIGSEGV in compiled method c8e.e.t_.getArray(Ljava/lang/Class;)[Ljava/lang/Object
kvn
parents:
10278
diff
changeset
|
3608 // Return NULL for allocations with several casts: |
|
2b3fe74309b6
8019247: SIGSEGV in compiled method c8e.e.t_.getArray(Ljava/lang/Class;)[Ljava/lang/Object
kvn
parents:
10278
diff
changeset
|
3609 // j.l.reflect.Array.newInstance(jobject, jint) |
|
2b3fe74309b6
8019247: SIGSEGV in compiled method c8e.e.t_.getArray(Ljava/lang/Class;)[Ljava/lang/Object
kvn
parents:
10278
diff
changeset
|
3610 // Object.clone() |
|
2b3fe74309b6
8019247: SIGSEGV in compiled method c8e.e.t_.getArray(Ljava/lang/Class;)[Ljava/lang/Object
kvn
parents:
10278
diff
changeset
|
3611 // to keep more precise type from last cast. |
| 0 | 3612 if (ptr->is_Proj()) { |
| 3613 Node* allo = ptr->in(0); | |
| 3614 if (allo != NULL && allo->is_Allocate()) { | |
| 3615 return allo->as_Allocate(); | |
| 3616 } | |
| 3617 } | |
| 3618 // Report failure to match. | |
| 3619 return NULL; | |
| 3620 } | |
| 3621 | |
| 3622 // Fancy version which also strips off an offset (and reports it to caller). | |
| 3623 AllocateNode* AllocateNode::Ideal_allocation(Node* ptr, PhaseTransform* phase, | |
| 3624 intptr_t& offset) { | |
| 3625 Node* base = AddPNode::Ideal_base_and_offset(ptr, phase, offset); | |
| 3626 if (base == NULL) return NULL; | |
| 3627 return Ideal_allocation(base, phase); | |
| 3628 } | |
| 3629 | |
| 3630 // Trace Initialize <- Proj[Parm] <- Allocate | |
| 3631 AllocateNode* InitializeNode::allocation() { | |
| 3632 Node* rawoop = in(InitializeNode::RawAddress); | |
| 3633 if (rawoop->is_Proj()) { | |
| 3634 Node* alloc = rawoop->in(0); | |
| 3635 if (alloc->is_Allocate()) { | |
| 3636 return alloc->as_Allocate(); | |
| 3637 } | |
| 3638 } | |
| 3639 return NULL; | |
| 3640 } | |
| 3641 | |
| 3642 // Trace Allocate -> Proj[Parm] -> Initialize | |
| 3643 InitializeNode* AllocateNode::initialization() { | |
| 3644 ProjNode* rawoop = proj_out(AllocateNode::RawAddress); | |
| 3645 if (rawoop == NULL) return NULL; | |
| 3646 for (DUIterator_Fast imax, i = rawoop->fast_outs(imax); i < imax; i++) { | |
| 3647 Node* init = rawoop->fast_out(i); | |
| 3648 if (init->is_Initialize()) { | |
| 3649 assert(init->as_Initialize()->allocation() == this, "2-way link"); | |
| 3650 return init->as_Initialize(); | |
| 3651 } | |
| 3652 } | |
| 3653 return NULL; | |
| 3654 } | |
|
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
3655 |
|
2383
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3656 //----------------------------- loop predicates --------------------------- |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3657 |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3658 //------------------------------add_predicate_impl---------------------------- |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3659 void GraphKit::add_predicate_impl(Deoptimization::DeoptReason reason, int nargs) { |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3660 // Too many traps seen? |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3661 if (too_many_traps(reason)) { |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3662 #ifdef ASSERT |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3663 if (TraceLoopPredicate) { |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3664 int tc = C->trap_count(reason); |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3665 tty->print("too many traps=%s tcount=%d in ", |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3666 Deoptimization::trap_reason_name(reason), tc); |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3667 method()->print(); // which method has too many predicate traps |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3668 tty->cr(); |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3669 } |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3670 #endif |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3671 // We cannot afford to take more traps here, |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3672 // do not generate predicate. |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3673 return; |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3674 } |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3675 |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3676 Node *cont = _gvn.intcon(1); |
|
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
3677 Node* opq = _gvn.transform(new (C) Opaque1Node(C, cont)); |
|
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
3678 Node *bol = _gvn.transform(new (C) Conv2BNode(opq)); |
|
2383
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3679 IfNode* iff = create_and_map_if(control(), bol, PROB_MAX, COUNT_UNKNOWN); |
|
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
3680 Node* iffalse = _gvn.transform(new (C) IfFalseNode(iff)); |
|
2383
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3681 C->add_predicate_opaq(opq); |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3682 { |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3683 PreserveJVMState pjvms(this); |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3684 set_control(iffalse); |
|
7194
beebba0acc11
7172640: C2: instrinsic implementations in LibraryCallKit should use argument() instead of pop()
twisti
parents:
6846
diff
changeset
|
3685 inc_sp(nargs); |
|
2383
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3686 uncommon_trap(reason, Deoptimization::Action_maybe_recompile); |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3687 } |
|
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
3688 Node* iftrue = _gvn.transform(new (C) IfTrueNode(iff)); |
|
2383
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3689 set_control(iftrue); |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3690 } |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3691 |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3692 //------------------------------add_predicate--------------------------------- |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3693 void GraphKit::add_predicate(int nargs) { |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3694 if (UseLoopPredicate) { |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3695 add_predicate_impl(Deoptimization::Reason_predicate, nargs); |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3696 } |
| 3345 | 3697 // loop's limit check predicate should be near the loop. |
| 3698 if (LoopLimitCheck) { | |
| 3699 add_predicate_impl(Deoptimization::Reason_loop_limit_check, nargs); | |
| 3700 } | |
|
2383
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3701 } |
|
9dc311b8473e
7008866: Missing loop predicate for loop with multiple entries
kvn
parents:
2007
diff
changeset
|
3702 |
|
851
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3703 //----------------------------- store barriers ---------------------------- |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3704 #define __ ideal. |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3705 |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3706 void GraphKit::sync_kit(IdealKit& ideal) { |
|
2444
07acc51c1d2a
7032314: Allow to generate CallLeafNoFPNode in IdealKit
kvn
parents:
2383
diff
changeset
|
3707 set_all_memory(__ merged_memory()); |
|
07acc51c1d2a
7032314: Allow to generate CallLeafNoFPNode in IdealKit
kvn
parents:
2383
diff
changeset
|
3708 set_i_o(__ i_o()); |
|
07acc51c1d2a
7032314: Allow to generate CallLeafNoFPNode in IdealKit
kvn
parents:
2383
diff
changeset
|
3709 set_control(__ ctrl()); |
|
07acc51c1d2a
7032314: Allow to generate CallLeafNoFPNode in IdealKit
kvn
parents:
2383
diff
changeset
|
3710 } |
|
07acc51c1d2a
7032314: Allow to generate CallLeafNoFPNode in IdealKit
kvn
parents:
2383
diff
changeset
|
3711 |
|
07acc51c1d2a
7032314: Allow to generate CallLeafNoFPNode in IdealKit
kvn
parents:
2383
diff
changeset
|
3712 void GraphKit::final_sync(IdealKit& ideal) { |
|
851
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3713 // Final sync IdealKit and graphKit. |
|
2444
07acc51c1d2a
7032314: Allow to generate CallLeafNoFPNode in IdealKit
kvn
parents:
2383
diff
changeset
|
3714 sync_kit(ideal); |
|
851
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3715 } |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3716 |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3717 // vanilla/CMS post barrier |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3718 // Insert a write-barrier store. This is to let generational GC work; we have |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3719 // to flag all oop-stores before the next GC point. |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3720 void GraphKit::write_barrier_post(Node* oop_store, |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3721 Node* obj, |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3722 Node* adr, |
|
985
685e959d09ea
6877254: Server vm crashes with no branches off of store slice" when run with CMS and UseSuperWord(default)
cfang
parents:
955
diff
changeset
|
3723 uint adr_idx, |
|
851
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3724 Node* val, |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3725 bool use_precise) { |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3726 // No store check needed if we're storing a NULL or an old object |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3727 // (latter case is probably a string constant). The concurrent |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3728 // mark sweep garbage collector, however, needs to have all nonNull |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3729 // oop updates flagged via card-marks. |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3730 if (val != NULL && val->is_Con()) { |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3731 // must be either an oop or NULL |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3732 const Type* t = val->bottom_type(); |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3733 if (t == TypePtr::NULL_PTR || t == Type::TOP) |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3734 // stores of null never (?) need barriers |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3735 return; |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3736 } |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3737 |
|
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
985
diff
changeset
|
3738 if (use_ReduceInitialCardMarks() |
|
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
985
diff
changeset
|
3739 && obj == just_allocated_object(control())) { |
|
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
985
diff
changeset
|
3740 // We can skip marks on a freshly-allocated object in Eden. |
| 1166 | 3741 // Keep this code in sync with new_store_pre_barrier() in runtime.cpp. |
| 3742 // That routine informs GC to take appropriate compensating steps, | |
| 3743 // upon a slow-path allocation, so as to make this card-mark | |
| 3744 // elision safe. | |
|
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
985
diff
changeset
|
3745 return; |
|
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
985
diff
changeset
|
3746 } |
|
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
985
diff
changeset
|
3747 |
|
851
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3748 if (!use_precise) { |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3749 // All card marks for a (non-array) instance are in one place: |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3750 adr = obj; |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3751 } |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3752 // (Else it's an array (or unknown), and we want more precise card marks.) |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3753 assert(adr != NULL, ""); |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3754 |
|
2444
07acc51c1d2a
7032314: Allow to generate CallLeafNoFPNode in IdealKit
kvn
parents:
2383
diff
changeset
|
3755 IdealKit ideal(this, true); |
|
851
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3756 |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3757 // Convert the pointer to an int prior to doing math on it |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3758 Node* cast = __ CastPX(__ ctrl(), adr); |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3759 |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3760 // Divide by card size |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3761 assert(Universe::heap()->barrier_set()->kind() == BarrierSet::CardTableModRef, |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3762 "Only one we handle so far."); |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3763 Node* card_offset = __ URShiftX( cast, __ ConI(CardTableModRefBS::card_shift) ); |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3764 |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3765 // Combine card table base and card offset |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3766 Node* card_adr = __ AddP(__ top(), byte_map_base_node(), card_offset ); |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3767 |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3768 // Get the alias_index for raw card-mark memory |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3769 int adr_type = Compile::AliasIdxRaw; |
| 3282 | 3770 Node* zero = __ ConI(0); // Dirty card value |
| 3771 BasicType bt = T_BYTE; | |
| 3772 | |
| 3773 if (UseCondCardMark) { | |
| 3774 // The classic GC reference write barrier is typically implemented | |
| 3775 // as a store into the global card mark table. Unfortunately | |
| 3776 // unconditional stores can result in false sharing and excessive | |
| 3777 // coherence traffic as well as false transactional aborts. | |
| 3778 // UseCondCardMark enables MP "polite" conditional card mark | |
| 3779 // stores. In theory we could relax the load from ctrl() to | |
| 3780 // no_ctrl, but that doesn't buy much latitude. | |
| 3781 Node* card_val = __ load( __ ctrl(), card_adr, TypeInt::BYTE, bt, adr_type); | |
| 3782 __ if_then(card_val, BoolTest::ne, zero); | |
| 3783 } | |
| 3784 | |
|
851
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3785 // Smash zero into card |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3786 if( !UseConcMarkSweepGC ) { |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3787 __ store(__ ctrl(), card_adr, zero, bt, adr_type); |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3788 } else { |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3789 // Specialized path for CM store barrier |
|
985
685e959d09ea
6877254: Server vm crashes with no branches off of store slice" when run with CMS and UseSuperWord(default)
cfang
parents:
955
diff
changeset
|
3790 __ storeCM(__ ctrl(), card_adr, zero, oop_store, adr_idx, bt, adr_type); |
|
851
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3791 } |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3792 |
| 3282 | 3793 if (UseCondCardMark) { |
| 3794 __ end_if(); | |
| 3795 } | |
| 3796 | |
|
851
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3797 // Final sync IdealKit and GraphKit. |
|
2444
07acc51c1d2a
7032314: Allow to generate CallLeafNoFPNode in IdealKit
kvn
parents:
2383
diff
changeset
|
3798 final_sync(ideal); |
|
851
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3799 } |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3800 |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3801 // G1 pre/post barriers |
|
3249
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2383
diff
changeset
|
3802 void GraphKit::g1_write_barrier_pre(bool do_load, |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2383
diff
changeset
|
3803 Node* obj, |
|
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
3804 Node* adr, |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
3805 uint alias_idx, |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
3806 Node* val, |
| 825 | 3807 const TypeOopPtr* val_type, |
|
3249
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2383
diff
changeset
|
3808 Node* pre_val, |
|
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
3809 BasicType bt) { |
|
3249
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2383
diff
changeset
|
3810 |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2383
diff
changeset
|
3811 // Some sanity checks |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2383
diff
changeset
|
3812 // Note: val is unused in this routine. |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2383
diff
changeset
|
3813 |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2383
diff
changeset
|
3814 if (do_load) { |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2383
diff
changeset
|
3815 // We need to generate the load of the previous value |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2383
diff
changeset
|
3816 assert(obj != NULL, "must have a base"); |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2383
diff
changeset
|
3817 assert(adr != NULL, "where are loading from?"); |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2383
diff
changeset
|
3818 assert(pre_val == NULL, "loaded already?"); |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2383
diff
changeset
|
3819 assert(val_type != NULL, "need a type"); |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2383
diff
changeset
|
3820 } else { |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2383
diff
changeset
|
3821 // In this case both val_type and alias_idx are unused. |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2383
diff
changeset
|
3822 assert(pre_val != NULL, "must be loaded already"); |
|
12169
29aa8936f03c
8023597: Optimize G1 barriers code for unsafe load_store
kvn
parents:
12159
diff
changeset
|
3823 // Nothing to be done if pre_val is null. |
|
29aa8936f03c
8023597: Optimize G1 barriers code for unsafe load_store
kvn
parents:
12159
diff
changeset
|
3824 if (pre_val->bottom_type() == TypePtr::NULL_PTR) return; |
|
3249
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2383
diff
changeset
|
3825 assert(pre_val->bottom_type()->basic_type() == T_OBJECT, "or we shouldn't be here"); |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2383
diff
changeset
|
3826 } |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2383
diff
changeset
|
3827 assert(bt == T_OBJECT, "or we shouldn't be here"); |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2383
diff
changeset
|
3828 |
|
2444
07acc51c1d2a
7032314: Allow to generate CallLeafNoFPNode in IdealKit
kvn
parents:
2383
diff
changeset
|
3829 IdealKit ideal(this, true); |
|
851
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3830 |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3831 Node* tls = __ thread(); // ThreadLocalStorage |
|
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
3832 |
|
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|
3833 Node* no_ctrl = NULL; |
|
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|
3834 Node* no_base = __ top(); |
|
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|
3835 Node* zero = __ ConI(0); |
|
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|
3836 Node* zeroX = __ ConX(0); |
|
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3837 |
|
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3838 float likely = PROB_LIKELY(0.999); |
|
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3839 float unlikely = PROB_UNLIKELY(0.999); |
|
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3840 |
|
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|
3841 BasicType active_type = in_bytes(PtrQueue::byte_width_of_active()) == 4 ? T_INT : T_BYTE; |
|
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3842 assert(in_bytes(PtrQueue::byte_width_of_active()) == 4 || in_bytes(PtrQueue::byte_width_of_active()) == 1, "flag width"); |
|
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3843 |
|
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3844 // Offsets into the thread |
|
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|
3845 const int marking_offset = in_bytes(JavaThread::satb_mark_queue_offset() + // 648 |
|
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|
3846 PtrQueue::byte_offset_of_active()); |
|
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3847 const int index_offset = in_bytes(JavaThread::satb_mark_queue_offset() + // 656 |
|
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|
3848 PtrQueue::byte_offset_of_index()); |
|
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3849 const int buffer_offset = in_bytes(JavaThread::satb_mark_queue_offset() + // 652 |
|
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|
3850 PtrQueue::byte_offset_of_buf()); |
|
3249
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|
3851 |
|
342
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3852 // Now the actual pointers into the thread |
|
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|
3853 Node* marking_adr = __ AddP(no_base, tls, __ ConX(marking_offset)); |
|
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|
3854 Node* buffer_adr = __ AddP(no_base, tls, __ ConX(buffer_offset)); |
|
fc4be448891f
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3855 Node* index_adr = __ AddP(no_base, tls, __ ConX(index_offset)); |
|
342
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|
3856 |
|
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|
3857 // Now some of the values |
|
544
82a980778b92
6793828: G1: invariant: queues are empty when activated
never
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|
3858 Node* marking = __ load(__ ctrl(), marking_adr, TypeInt::INT, active_type, Compile::AliasIdxRaw); |
|
342
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|
3859 |
|
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|
3860 // if (!marking) |
| 12886 | 3861 __ if_then(marking, BoolTest::ne, zero, unlikely); { |
|
10185
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|
3862 BasicType index_bt = TypeX_X->basic_type(); |
|
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|
3863 assert(sizeof(size_t) == type2aelembytes(index_bt), "Loading G1 PtrQueue::_index with wrong size."); |
|
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|
3864 Node* index = __ load(__ ctrl(), index_adr, TypeX_X, index_bt, Compile::AliasIdxRaw); |
|
342
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|
3865 |
|
3249
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|
3866 if (do_load) { |
|
342
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|
3867 // load original value |
|
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|
3868 // alias_idx correct?? |
| 12159 | 3869 pre_val = __ load(__ ctrl(), adr, val_type, bt, alias_idx); |
|
3249
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7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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|
3870 } |
|
e1162778c1c8
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johnc
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|
3871 |
|
e1162778c1c8
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|
3872 // if (pre_val != NULL) |
|
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|
3873 __ if_then(pre_val, BoolTest::ne, null()); { |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
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|
3874 Node* buffer = __ load(__ ctrl(), buffer_adr, TypeRawPtr::NOTNULL, T_ADDRESS, Compile::AliasIdxRaw); |
|
342
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|
3875 |
|
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|
3876 // is the queue for this thread full? |
|
10185
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|
3877 __ if_then(index, BoolTest::ne, zeroX, likely); { |
|
342
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|
3878 |
|
37f87013dfd8
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|
3879 // decrement the index |
|
10185
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|
3880 Node* next_index = _gvn.transform(new (C) SubXNode(index, __ ConX(sizeof(intptr_t)))); |
|
342
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|
3881 |
|
3249
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7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
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|
3882 // Now get the buffer location we will log the previous value into and store it |
|
10185
d50cc62e94ff
8012715: G1: GraphKit accesses PtrQueue::_index as int but is size_t
johnc
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|
3883 Node *log_addr = __ AddP(no_base, buffer, next_index); |
|
3249
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
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|
3884 __ store(__ ctrl(), log_addr, pre_val, T_OBJECT, Compile::AliasIdxRaw); |
|
342
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|
3885 // update the index |
|
10185
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johnc
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|
3886 __ store(__ ctrl(), index_adr, next_index, index_bt, Compile::AliasIdxRaw); |
|
342
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|
3887 |
|
37f87013dfd8
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|
3888 } __ else_(); { |
|
37f87013dfd8
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|
3889 |
|
37f87013dfd8
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|
3890 // logging buffer is full, call the runtime |
|
37f87013dfd8
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|
3891 const TypeFunc *tf = OptoRuntime::g1_wb_pre_Type(); |
|
3249
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2383
diff
changeset
|
3892 __ make_leaf_call(tf, CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_pre), "g1_wb_pre", pre_val, tls); |
|
851
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
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|
3893 } __ end_if(); // (!index) |
|
3249
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
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diff
changeset
|
3894 } __ end_if(); // (pre_val != NULL) |
|
851
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
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|
3895 } __ end_if(); // (!marking) |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
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|
3896 |
|
fc4be448891f
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kvn
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|
3897 // Final sync IdealKit and GraphKit. |
|
2444
07acc51c1d2a
7032314: Allow to generate CallLeafNoFPNode in IdealKit
kvn
parents:
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diff
changeset
|
3898 final_sync(ideal); |
|
342
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|
3899 } |
|
37f87013dfd8
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|
3900 |
|
37f87013dfd8
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|
3901 // |
|
37f87013dfd8
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|
3902 // Update the card table and add card address to the queue |
|
37f87013dfd8
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|
3903 // |
|
851
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|
3904 void GraphKit::g1_mark_card(IdealKit& ideal, |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
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|
3905 Node* card_adr, |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
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changeset
|
3906 Node* oop_store, |
|
985
685e959d09ea
6877254: Server vm crashes with no branches off of store slice" when run with CMS and UseSuperWord(default)
cfang
parents:
955
diff
changeset
|
3907 uint oop_alias_idx, |
|
851
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
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|
3908 Node* index, |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3909 Node* index_adr, |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
827
diff
changeset
|
3910 Node* buffer, |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents:
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|
3911 const TypeFunc* tf) { |
|
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
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|
3912 |
|
10185
d50cc62e94ff
8012715: G1: GraphKit accesses PtrQueue::_index as int but is size_t
johnc
parents:
8868
diff
changeset
|
3913 Node* zero = __ ConI(0); |
|
d50cc62e94ff
8012715: G1: GraphKit accesses PtrQueue::_index as int but is size_t
johnc
parents:
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changeset
|
3914 Node* zeroX = __ ConX(0); |
|
342
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|
3915 Node* no_base = __ top(); |
|
37f87013dfd8
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|
3916 BasicType card_bt = T_BYTE; |
|
37f87013dfd8
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diff
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|
3917 // Smash zero into card. MUST BE ORDERED WRT TO STORE |
|
985
685e959d09ea
6877254: Server vm crashes with no branches off of store slice" when run with CMS and UseSuperWord(default)
cfang
parents:
955
diff
changeset
|
3918 __ storeCM(__ ctrl(), card_adr, zero, oop_store, oop_alias_idx, card_bt, Compile::AliasIdxRaw); |
|
342
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|
3919 |
|
37f87013dfd8
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|
3920 // Now do the queue work |
|
10185
d50cc62e94ff
8012715: G1: GraphKit accesses PtrQueue::_index as int but is size_t
johnc
parents:
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|
3921 __ if_then(index, BoolTest::ne, zeroX); { |
|
d50cc62e94ff
8012715: G1: GraphKit accesses PtrQueue::_index as int but is size_t
johnc
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8868
diff
changeset
|
3922 |
|
d50cc62e94ff
8012715: G1: GraphKit accesses PtrQueue::_index as int but is size_t
johnc
parents:
8868
diff
changeset
|
3923 Node* next_index = _gvn.transform(new (C) SubXNode(index, __ ConX(sizeof(intptr_t)))); |
|
d50cc62e94ff
8012715: G1: GraphKit accesses PtrQueue::_index as int but is size_t
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|
3924 Node* log_addr = __ AddP(no_base, buffer, next_index); |
|
342
37f87013dfd8
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|
3925 |
|
37f87013dfd8
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|
3926 __ store(__ ctrl(), log_addr, card_adr, T_ADDRESS, Compile::AliasIdxRaw); |
|
10185
d50cc62e94ff
8012715: G1: GraphKit accesses PtrQueue::_index as int but is size_t
johnc
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|
3927 __ store(__ ctrl(), index_adr, next_index, TypeX_X->basic_type(), Compile::AliasIdxRaw); |
|
342
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|
3928 |
|
37f87013dfd8
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diff
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|
3929 } __ else_(); { |
|
37f87013dfd8
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|
3930 __ make_leaf_call(tf, CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_post), "g1_wb_post", card_adr, __ thread()); |
|
37f87013dfd8
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|
3931 } __ end_if(); |
|
851
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6851742: (EA) allocation elimination doesn't work with UseG1GC
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|
3932 |
|
342
37f87013dfd8
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|
3933 } |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
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diff
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|
3934 |
|
851
fc4be448891f
6851742: (EA) allocation elimination doesn't work with UseG1GC
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|
3935 void GraphKit::g1_write_barrier_post(Node* oop_store, |
|
342
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|
3936 Node* obj, |
|
37f87013dfd8
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diff
changeset
|
3937 Node* adr, |
|
37f87013dfd8
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diff
changeset
|
3938 uint alias_idx, |
|
37f87013dfd8
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diff
changeset
|
3939 Node* val, |
|
37f87013dfd8
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diff
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|
3940 BasicType bt, |
|
37f87013dfd8
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|
3941 bool use_precise) { |
|
37f87013dfd8
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|
3942 // If we are writing a NULL then we need no post barrier |
|
37f87013dfd8
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diff
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|
3943 |
|
37f87013dfd8
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|
3944 if (val != NULL && val->is_Con() && val->bottom_type() == TypePtr::NULL_PTR) { |
|
37f87013dfd8
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|
3945 // Must be NULL |
|
37f87013dfd8
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|
3946 const Type* t = val->bottom_type(); |
|
37f87013dfd8
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|
3947 assert(t == Type::TOP || t == TypePtr::NULL_PTR, "must be NULL"); |
|
37f87013dfd8
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|
3948 // No post barrier if writing NULLx |
|
37f87013dfd8
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|
3949 return; |
|
37f87013dfd8
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|
3950 } |
|
37f87013dfd8
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|
3951 |
|
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3952 if (!use_precise) { |
|
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3953 // All card marks for a (non-array) instance are in one place: |
|
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|
3954 adr = obj; |
|
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|
3955 } |
|
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|
3956 // (Else it's an array (or unknown), and we want more precise card marks.) |
|
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3957 assert(adr != NULL, ""); |
|
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|
3958 |
|
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07acc51c1d2a
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|
3959 IdealKit ideal(this, true); |
|
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|
3960 |
|
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|
3961 Node* tls = __ thread(); // ThreadLocalStorage |
|
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3962 |
|
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|
3963 Node* no_base = __ top(); |
|
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|
3964 float likely = PROB_LIKELY(0.999); |
|
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|
3965 float unlikely = PROB_UNLIKELY(0.999); |
|
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3966 Node* young_card = __ ConI((jint)G1SATBCardTableModRefBS::g1_young_card_val()); |
|
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3967 Node* dirty_card = __ ConI((jint)CardTableModRefBS::dirty_card_val()); |
|
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|
3968 Node* zeroX = __ ConX(0); |
|
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|
3969 |
|
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|
3970 // Get the alias_index for raw card-mark memory |
|
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3971 const TypePtr* card_type = TypeRawPtr::BOTTOM; |
|
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|
3972 |
|
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|
3973 const TypeFunc *tf = OptoRuntime::g1_wb_post_Type(); |
|
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|
3974 |
|
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|
3975 // Offsets into the thread |
|
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|
3976 const int index_offset = in_bytes(JavaThread::dirty_card_queue_offset() + |
|
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|
3977 PtrQueue::byte_offset_of_index()); |
|
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|
3978 const int buffer_offset = in_bytes(JavaThread::dirty_card_queue_offset() + |
|
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|
3979 PtrQueue::byte_offset_of_buf()); |
|
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|
3980 |
|
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|
3981 // Pointers into the thread |
|
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|
3982 |
|
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|
3983 Node* buffer_adr = __ AddP(no_base, tls, __ ConX(buffer_offset)); |
|
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3984 Node* index_adr = __ AddP(no_base, tls, __ ConX(index_offset)); |
|
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|
3985 |
|
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|
3986 // Now some values |
|
1593
2458a1f25356
6953058: G1: A bigapp crashes with SIGSEGV in compiled code
johnc
parents:
1397
diff
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|
3987 // Use ctrl to avoid hoisting these values past a safepoint, which could |
|
2458a1f25356
6953058: G1: A bigapp crashes with SIGSEGV in compiled code
johnc
parents:
1397
diff
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|
3988 // potentially reset these fields in the JavaThread. |
|
10185
d50cc62e94ff
8012715: G1: GraphKit accesses PtrQueue::_index as int but is size_t
johnc
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8868
diff
changeset
|
3989 Node* index = __ load(__ ctrl(), index_adr, TypeX_X, TypeX_X->basic_type(), Compile::AliasIdxRaw); |
|
1593
2458a1f25356
6953058: G1: A bigapp crashes with SIGSEGV in compiled code
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|
3990 Node* buffer = __ load(__ ctrl(), buffer_adr, TypeRawPtr::NOTNULL, T_ADDRESS, Compile::AliasIdxRaw); |
|
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|
3991 |
|
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|
3992 // Convert the store obj pointer to an int prior to doing math on it |
|
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3993 // Must use ctrl to prevent "integerized oop" existing across safepoint |
|
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|
3994 Node* cast = __ CastPX(__ ctrl(), adr); |
|
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|
3995 |
|
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|
3996 // Divide pointer by card size |
|
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|
3997 Node* card_offset = __ URShiftX( cast, __ ConI(CardTableModRefBS::card_shift) ); |
|
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|
3998 |
|
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|
3999 // Combine card table base and card offset |
|
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4000 Node* card_adr = __ AddP(no_base, byte_map_base_node(), card_offset ); |
|
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4001 |
|
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|
4002 // If we know the value being stored does it cross regions? |
|
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|
4003 |
|
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|
4004 if (val != NULL) { |
|
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|
4005 // Does the store cause us to cross regions? |
|
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|
4006 |
|
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|
4007 // Should be able to do an unsigned compare of region_size instead of |
|
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|
4008 // and extra shift. Do we have an unsigned compare?? |
|
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|
4009 // Node* region_size = __ ConI(1 << HeapRegion::LogOfHRGrainBytes); |
|
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|
4010 Node* xor_res = __ URShiftX ( __ XorX( cast, __ CastPX(__ ctrl(), val)), __ ConI(HeapRegion::LogOfHRGrainBytes)); |
|
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|
4011 |
|
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|
4012 // if (xor_res == 0) same region so skip |
|
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|
4013 __ if_then(xor_res, BoolTest::ne, zeroX); { |
|
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|
4014 |
|
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|
4015 // No barrier if we are storing a NULL |
|
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|
4016 __ if_then(val, BoolTest::ne, null(), unlikely); { |
|
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|
4017 |
|
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|
4018 // Ok must mark the card if not already dirty |
|
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|
4019 |
|
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|
4020 // load the original value of the card |
|
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|
4021 Node* card_val = __ load(__ ctrl(), card_adr, TypeInt::INT, T_BYTE, Compile::AliasIdxRaw); |
|
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|
4022 |
|
12835
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|
4023 __ if_then(card_val, BoolTest::ne, young_card); { |
|
69944b868a32
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mgerdin
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|
4024 sync_kit(ideal); |
|
69944b868a32
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|
4025 // Use Op_MemBarVolatile to achieve the effect of a StoreLoad barrier. |
|
69944b868a32
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|
4026 insert_mem_bar(Op_MemBarVolatile, oop_store); |
|
69944b868a32
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|
4027 __ sync_kit(this); |
|
69944b868a32
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|
4028 |
|
69944b868a32
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|
4029 Node* card_val_reload = __ load(__ ctrl(), card_adr, TypeInt::INT, T_BYTE, Compile::AliasIdxRaw); |
|
69944b868a32
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|
4030 __ if_then(card_val_reload, BoolTest::ne, dirty_card); { |
|
69944b868a32
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|
4031 g1_mark_card(ideal, card_adr, oop_store, alias_idx, index, index_adr, buffer, tf); |
|
69944b868a32
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|
4032 } __ end_if(); |
|
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|
4033 } __ end_if(); |
|
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|
4034 } __ end_if(); |
|
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|
4035 } __ end_if(); |
|
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|
4036 } else { |
|
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|
4037 // Object.clone() instrinsic uses this path. |
|
985
685e959d09ea
6877254: Server vm crashes with no branches off of store slice" when run with CMS and UseSuperWord(default)
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diff
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|
4038 g1_mark_card(ideal, card_adr, oop_store, alias_idx, index, index_adr, buffer, tf); |
|
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|
4039 } |
|
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|
4040 |
|
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|
4041 // Final sync IdealKit and GraphKit. |
|
2444
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|
4042 final_sync(ideal); |
|
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|
4043 } |
|
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|
4044 #undef __ |
| 6057 | 4045 |
| 4046 | |
| 4047 | |
| 4048 Node* GraphKit::load_String_offset(Node* ctrl, Node* str) { | |
| 4049 if (java_lang_String::has_offset_field()) { | |
| 4050 int offset_offset = java_lang_String::offset_offset_in_bytes(); | |
| 4051 const TypeInstPtr* string_type = TypeInstPtr::make(TypePtr::NotNull, C->env()->String_klass(), | |
| 4052 false, NULL, 0); | |
| 4053 const TypePtr* offset_field_type = string_type->add_offset(offset_offset); | |
| 4054 int offset_field_idx = C->get_alias_index(offset_field_type); | |
| 4055 return make_load(ctrl, | |
| 4056 basic_plus_adr(str, str, offset_offset), | |
| 4057 TypeInt::INT, T_INT, offset_field_idx); | |
| 4058 } else { | |
| 4059 return intcon(0); | |
| 4060 } | |
| 4061 } | |
| 4062 | |
| 4063 Node* GraphKit::load_String_length(Node* ctrl, Node* str) { | |
| 4064 if (java_lang_String::has_count_field()) { | |
| 4065 int count_offset = java_lang_String::count_offset_in_bytes(); | |
| 4066 const TypeInstPtr* string_type = TypeInstPtr::make(TypePtr::NotNull, C->env()->String_klass(), | |
| 4067 false, NULL, 0); | |
| 4068 const TypePtr* count_field_type = string_type->add_offset(count_offset); | |
| 4069 int count_field_idx = C->get_alias_index(count_field_type); | |
| 4070 return make_load(ctrl, | |
| 4071 basic_plus_adr(str, str, count_offset), | |
| 4072 TypeInt::INT, T_INT, count_field_idx); | |
| 4073 } else { | |
| 4074 return load_array_length(load_String_value(ctrl, str)); | |
| 4075 } | |
| 4076 } | |
| 4077 | |
| 4078 Node* GraphKit::load_String_value(Node* ctrl, Node* str) { | |
| 4079 int value_offset = java_lang_String::value_offset_in_bytes(); | |
| 4080 const TypeInstPtr* string_type = TypeInstPtr::make(TypePtr::NotNull, C->env()->String_klass(), | |
| 4081 false, NULL, 0); | |
| 4082 const TypePtr* value_field_type = string_type->add_offset(value_offset); | |
| 4083 const TypeAryPtr* value_type = TypeAryPtr::make(TypePtr::NotNull, | |
| 4084 TypeAry::make(TypeInt::CHAR,TypeInt::POS), | |
| 4085 ciTypeArrayKlass::make(T_CHAR), true, 0); | |
| 4086 int value_field_idx = C->get_alias_index(value_field_type); | |
|
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|
4087 Node* load = make_load(ctrl, basic_plus_adr(str, str, value_offset), |
|
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|
4088 value_type, T_OBJECT, value_field_idx); |
|
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|
4089 // String.value field is known to be @Stable. |
|
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|
4090 if (UseImplicitStableValues) { |
|
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|
4091 load = cast_array_to_stable(load, value_type); |
|
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|
4092 } |
|
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|
4093 return load; |
| 6057 | 4094 } |
| 4095 | |
| 4096 void GraphKit::store_String_offset(Node* ctrl, Node* str, Node* value) { | |
| 4097 int offset_offset = java_lang_String::offset_offset_in_bytes(); | |
| 4098 const TypeInstPtr* string_type = TypeInstPtr::make(TypePtr::NotNull, C->env()->String_klass(), | |
| 4099 false, NULL, 0); | |
| 4100 const TypePtr* offset_field_type = string_type->add_offset(offset_offset); | |
| 4101 int offset_field_idx = C->get_alias_index(offset_field_type); | |
| 4102 store_to_memory(ctrl, basic_plus_adr(str, offset_offset), | |
| 4103 value, T_INT, offset_field_idx); | |
| 4104 } | |
| 4105 | |
| 4106 void GraphKit::store_String_value(Node* ctrl, Node* str, Node* value) { | |
| 4107 int value_offset = java_lang_String::value_offset_in_bytes(); | |
| 4108 const TypeInstPtr* string_type = TypeInstPtr::make(TypePtr::NotNull, C->env()->String_klass(), | |
| 4109 false, NULL, 0); | |
| 4110 const TypePtr* value_field_type = string_type->add_offset(value_offset); | |
|
12331
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|
4111 |
|
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|
4112 store_oop_to_object(ctrl, str, basic_plus_adr(str, value_offset), value_field_type, |
|
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|
4113 value, TypeAryPtr::CHARS, T_OBJECT); |
| 6057 | 4114 } |
| 4115 | |
| 4116 void GraphKit::store_String_length(Node* ctrl, Node* str, Node* value) { | |
| 4117 int count_offset = java_lang_String::count_offset_in_bytes(); | |
| 4118 const TypeInstPtr* string_type = TypeInstPtr::make(TypePtr::NotNull, C->env()->String_klass(), | |
| 4119 false, NULL, 0); | |
| 4120 const TypePtr* count_field_type = string_type->add_offset(count_offset); | |
| 4121 int count_field_idx = C->get_alias_index(count_field_type); | |
| 4122 store_to_memory(ctrl, basic_plus_adr(str, count_offset), | |
| 4123 value, T_INT, count_field_idx); | |
| 4124 } | |
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12190
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4125 |
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4126 Node* GraphKit::cast_array_to_stable(Node* ary, const TypeAryPtr* ary_type) { |
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4127 // Reify the property as a CastPP node in Ideal graph to comply with monotonicity |
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4128 // assumption of CCP analysis. |
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4129 return _gvn.transform(new(C) CastPPNode(ary, ary_type->cast_to_stable(true))); |
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4130 } |