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Issue 9325019: Allow bailing out of the register allocator when running out of virtual registers. (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: '' Created 8 years, 10 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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664 ? chunk_->DefineConstantOperand(HConstant::cast(value)) 664 ? chunk_->DefineConstantOperand(HConstant::cast(value))
665 : Use(value, new LUnallocated(LUnallocated::ANY)); 665 : Use(value, new LUnallocated(LUnallocated::ANY));
666 } 666 }
667 667
668 668
669 LOperand* LChunkBuilder::Use(HValue* value, LUnallocated* operand) { 669 LOperand* LChunkBuilder::Use(HValue* value, LUnallocated* operand) {
670 if (value->EmitAtUses()) { 670 if (value->EmitAtUses()) {
671 HInstruction* instr = HInstruction::cast(value); 671 HInstruction* instr = HInstruction::cast(value);
672 VisitInstruction(instr); 672 VisitInstruction(instr);
673 } 673 }
674 allocator_->RecordUse(value, operand); 674 operand->set_virtual_register(value->id());
675 return operand; 675 return operand;
676 } 676 }
677 677
678 678
679 template<int I, int T> 679 template<int I, int T>
680 LInstruction* LChunkBuilder::Define(LTemplateInstruction<1, I, T>* instr, 680 LInstruction* LChunkBuilder::Define(LTemplateInstruction<1, I, T>* instr,
681 LUnallocated* result) { 681 LUnallocated* result) {
682 allocator_->RecordDefinition(current_instruction_, result); 682 result->set_virtual_register(current_instruction_->id());
683 instr->set_result(result); 683 instr->set_result(result);
684 return instr; 684 return instr;
685 } 685 }
686 686
687 687
688 template<int I, int T> 688 template<int I, int T>
689 LInstruction* LChunkBuilder::DefineAsRegister( 689 LInstruction* LChunkBuilder::DefineAsRegister(
690 LTemplateInstruction<1, I, T>* instr) { 690 LTemplateInstruction<1, I, T>* instr) {
691 return Define(instr, new LUnallocated(LUnallocated::MUST_HAVE_REGISTER)); 691 return Define(instr, new LUnallocated(LUnallocated::MUST_HAVE_REGISTER));
692 } 692 }
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784 784
785 LInstruction* LChunkBuilder::AssignPointerMap(LInstruction* instr) { 785 LInstruction* LChunkBuilder::AssignPointerMap(LInstruction* instr) {
786 ASSERT(!instr->HasPointerMap()); 786 ASSERT(!instr->HasPointerMap());
787 instr->set_pointer_map(new LPointerMap(position_)); 787 instr->set_pointer_map(new LPointerMap(position_));
788 return instr; 788 return instr;
789 } 789 }
790 790
791 791
792 LUnallocated* LChunkBuilder::TempRegister() { 792 LUnallocated* LChunkBuilder::TempRegister() {
793 LUnallocated* operand = new LUnallocated(LUnallocated::MUST_HAVE_REGISTER); 793 LUnallocated* operand = new LUnallocated(LUnallocated::MUST_HAVE_REGISTER);
794 allocator_->RecordTemporary(operand); 794 operand->set_virtual_register(allocator_->GetVirtualRegister());
795 if (!allocator_->AllocationOk()) Abort("Not enough virtual registers.");
795 return operand; 796 return operand;
796 } 797 }
797 798
798 799
799 LOperand* LChunkBuilder::FixedTemp(Register reg) { 800 LOperand* LChunkBuilder::FixedTemp(Register reg) {
800 LUnallocated* operand = ToUnallocated(reg); 801 LUnallocated* operand = ToUnallocated(reg);
801 allocator_->RecordTemporary(operand); 802 ASSERT(operand->HasFixedPolicy());
802 return operand; 803 return operand;
803 } 804 }
804 805
805 806
806 LOperand* LChunkBuilder::FixedTemp(DoubleRegister reg) { 807 LOperand* LChunkBuilder::FixedTemp(DoubleRegister reg) {
807 LUnallocated* operand = ToUnallocated(reg); 808 LUnallocated* operand = ToUnallocated(reg);
808 allocator_->RecordTemporary(operand); 809 ASSERT(operand->HasFixedPolicy());
809 return operand; 810 return operand;
810 } 811 }
811 812
812 813
813 LInstruction* LChunkBuilder::DoBlockEntry(HBlockEntry* instr) { 814 LInstruction* LChunkBuilder::DoBlockEntry(HBlockEntry* instr) {
814 return new LLabel(instr->block()); 815 return new LLabel(instr->block());
815 } 816 }
816 817
817 818
818 LInstruction* LChunkBuilder::DoSoftDeoptimize(HSoftDeoptimize* instr) { 819 LInstruction* LChunkBuilder::DoSoftDeoptimize(HSoftDeoptimize* instr) {
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2262 2263
2263 LInstruction* LChunkBuilder::DoIn(HIn* instr) { 2264 LInstruction* LChunkBuilder::DoIn(HIn* instr) {
2264 LOperand* key = UseRegisterAtStart(instr->key()); 2265 LOperand* key = UseRegisterAtStart(instr->key());
2265 LOperand* object = UseRegisterAtStart(instr->object()); 2266 LOperand* object = UseRegisterAtStart(instr->object());
2266 LIn* result = new LIn(key, object); 2267 LIn* result = new LIn(key, object);
2267 return MarkAsCall(DefineFixed(result, v0), instr); 2268 return MarkAsCall(DefineFixed(result, v0), instr);
2268 } 2269 }
2269 2270
2270 2271
2271 } } // namespace v8::internal 2272 } } // namespace v8::internal
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