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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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917 current_block_ = NULL; | 917 current_block_ = NULL; |
918 } | 918 } |
919 | 919 |
920 | 920 |
921 void LChunkBuilder::VisitInstruction(HInstruction* current) { | 921 void LChunkBuilder::VisitInstruction(HInstruction* current) { |
922 HInstruction* old_current = current_instruction_; | 922 HInstruction* old_current = current_instruction_; |
923 current_instruction_ = current; | 923 current_instruction_ = current; |
924 | 924 |
925 LInstruction* instr = NULL; | 925 LInstruction* instr = NULL; |
926 if (current->CanReplaceWithDummyUses()) { | 926 if (current->CanReplaceWithDummyUses()) { |
927 HValue* first_operand = current->OperandCount() == 0 | 927 if (current->OperandCount() == 0) { |
928 ? graph()->GetConstant1() | 928 instr = DefineAsRegister(new(zone()) LDummy()); |
929 : current->OperandAt(0); | 929 } else { |
930 instr = DefineAsRegister(new(zone()) LDummyUse(UseAny(first_operand))); | 930 instr = DefineAsRegister(new(zone()) |
| 931 LDummyUse(UseAny(current->OperandAt(0)))); |
| 932 } |
931 for (int i = 1; i < current->OperandCount(); ++i) { | 933 for (int i = 1; i < current->OperandCount(); ++i) { |
932 LInstruction* dummy = | 934 LInstruction* dummy = |
933 new(zone()) LDummyUse(UseAny(current->OperandAt(i))); | 935 new(zone()) LDummyUse(UseAny(current->OperandAt(i))); |
934 dummy->set_hydrogen_value(current); | 936 dummy->set_hydrogen_value(current); |
935 chunk_->AddInstruction(dummy, current_block_); | 937 chunk_->AddInstruction(dummy, current_block_); |
936 } | 938 } |
937 } else { | 939 } else { |
938 instr = current->CompileToLithium(this); | 940 instr = current->CompileToLithium(this); |
939 } | 941 } |
940 | 942 |
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2750 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) { | 2752 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) { |
2751 LOperand* object = UseRegister(instr->object()); | 2753 LOperand* object = UseRegister(instr->object()); |
2752 LOperand* index = UseTempRegister(instr->index()); | 2754 LOperand* index = UseTempRegister(instr->index()); |
2753 return DefineSameAsFirst(new(zone()) LLoadFieldByIndex(object, index)); | 2755 return DefineSameAsFirst(new(zone()) LLoadFieldByIndex(object, index)); |
2754 } | 2756 } |
2755 | 2757 |
2756 | 2758 |
2757 } } // namespace v8::internal | 2759 } } // namespace v8::internal |
2758 | 2760 |
2759 #endif // V8_TARGET_ARCH_IA32 | 2761 #endif // V8_TARGET_ARCH_IA32 |
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