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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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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 if (current->has_position()) position_ = current->position(); | 862 if (current->has_position()) position_ = current->position(); |
863 | 863 |
864 LInstruction* instr = NULL; | 864 LInstruction* instr = NULL; |
865 if (current->CanReplaceWithDummyUses()) { | 865 if (current->CanReplaceWithDummyUses()) { |
866 HValue* first_operand = current->OperandCount() == 0 | 866 if (current->OperandCount() == 0) { |
867 ? graph()->GetConstant1() | 867 instr = DefineAsRegister(new(zone()) LDummy()); |
868 : current->OperandAt(0); | 868 } else { |
869 instr = DefineAsRegister(new(zone()) LDummyUse(UseAny(first_operand))); | 869 instr = DefineAsRegister(new(zone()) |
| 870 LDummyUse(UseAny(current->OperandAt(0)))); |
| 871 } |
870 for (int i = 1; i < current->OperandCount(); ++i) { | 872 for (int i = 1; i < current->OperandCount(); ++i) { |
871 LInstruction* dummy = | 873 LInstruction* dummy = |
872 new(zone()) LDummyUse(UseAny(current->OperandAt(i))); | 874 new(zone()) LDummyUse(UseAny(current->OperandAt(i))); |
873 dummy->set_hydrogen_value(current); | 875 dummy->set_hydrogen_value(current); |
874 chunk_->AddInstruction(dummy, current_block_); | 876 chunk_->AddInstruction(dummy, current_block_); |
875 } | 877 } |
876 } else { | 878 } else { |
877 instr = current->CompileToLithium(this); | 879 instr = current->CompileToLithium(this); |
878 } | 880 } |
879 | 881 |
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2666 | 2668 |
2667 | 2669 |
2668 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) { | 2670 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) { |
2669 LOperand* object = UseRegister(instr->object()); | 2671 LOperand* object = UseRegister(instr->object()); |
2670 LOperand* index = UseRegister(instr->index()); | 2672 LOperand* index = UseRegister(instr->index()); |
2671 return DefineAsRegister(new(zone()) LLoadFieldByIndex(object, index)); | 2673 return DefineAsRegister(new(zone()) LLoadFieldByIndex(object, index)); |
2672 } | 2674 } |
2673 | 2675 |
2674 | 2676 |
2675 } } // namespace v8::internal | 2677 } } // namespace v8::internal |
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