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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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855 current_block_ = NULL; | 855 current_block_ = NULL; |
856 } | 856 } |
857 | 857 |
858 | 858 |
859 void LChunkBuilder::VisitInstruction(HInstruction* current) { | 859 void LChunkBuilder::VisitInstruction(HInstruction* current) { |
860 HInstruction* old_current = current_instruction_; | 860 HInstruction* old_current = current_instruction_; |
861 current_instruction_ = current; | 861 current_instruction_ = current; |
862 | 862 |
863 LInstruction* instr = NULL; | 863 LInstruction* instr = NULL; |
864 if (current->CanReplaceWithDummyUses()) { | 864 if (current->CanReplaceWithDummyUses()) { |
865 HValue* first_operand = current->OperandCount() == 0 | 865 if (current->OperandCount() == 0) { |
866 ? graph()->GetConstant1() | 866 instr = DefineAsRegister(new(zone()) LDummy()); |
867 : current->OperandAt(0); | 867 } else { |
868 instr = DefineAsRegister(new(zone()) LDummyUse(UseAny(first_operand))); | 868 instr = DefineAsRegister(new(zone()) |
| 869 LDummyUse(UseAny(current->OperandAt(0)))); |
| 870 } |
869 for (int i = 1; i < current->OperandCount(); ++i) { | 871 for (int i = 1; i < current->OperandCount(); ++i) { |
870 LInstruction* dummy = | 872 LInstruction* dummy = |
871 new(zone()) LDummyUse(UseAny(current->OperandAt(i))); | 873 new(zone()) LDummyUse(UseAny(current->OperandAt(i))); |
872 dummy->set_hydrogen_value(current); | 874 dummy->set_hydrogen_value(current); |
873 chunk_->AddInstruction(dummy, current_block_); | 875 chunk_->AddInstruction(dummy, current_block_); |
874 } | 876 } |
875 } else { | 877 } else { |
876 instr = current->CompileToLithium(this); | 878 instr = current->CompileToLithium(this); |
877 } | 879 } |
878 | 880 |
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2549 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) { | 2551 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) { |
2550 LOperand* object = UseRegister(instr->object()); | 2552 LOperand* object = UseRegister(instr->object()); |
2551 LOperand* index = UseTempRegister(instr->index()); | 2553 LOperand* index = UseTempRegister(instr->index()); |
2552 return DefineSameAsFirst(new(zone()) LLoadFieldByIndex(object, index)); | 2554 return DefineSameAsFirst(new(zone()) LLoadFieldByIndex(object, index)); |
2553 } | 2555 } |
2554 | 2556 |
2555 | 2557 |
2556 } } // namespace v8::internal | 2558 } } // namespace v8::internal |
2557 | 2559 |
2558 #endif // V8_TARGET_ARCH_X64 | 2560 #endif // V8_TARGET_ARCH_X64 |
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