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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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861 } | 861 } |
862 | 862 |
863 | 863 |
864 void LChunkBuilder::VisitInstruction(HInstruction* current) { | 864 void LChunkBuilder::VisitInstruction(HInstruction* current) { |
865 HInstruction* old_current = current_instruction_; | 865 HInstruction* old_current = current_instruction_; |
866 current_instruction_ = current; | 866 current_instruction_ = current; |
867 if (current->has_position()) position_ = current->position(); | 867 if (current->has_position()) position_ = current->position(); |
868 | 868 |
869 LInstruction* instr = NULL; | 869 LInstruction* instr = NULL; |
870 if (current->CanReplaceWithDummyUses()) { | 870 if (current->CanReplaceWithDummyUses()) { |
871 HValue* first_operand = current->OperandCount() == 0 | 871 if (current->OperandCount() == 0) { |
872 ? graph()->GetConstant1() | 872 instr = DefineAsRegister(new(zone()) LDummy()); |
873 : current->OperandAt(0); | 873 } else { |
874 instr = DefineAsRegister(new(zone()) LDummyUse(UseAny(first_operand))); | 874 instr = DefineAsRegister(new(zone()) |
| 875 LDummyUse(UseAny(current->OperandAt(0)))); |
| 876 } |
875 for (int i = 1; i < current->OperandCount(); ++i) { | 877 for (int i = 1; i < current->OperandCount(); ++i) { |
876 LInstruction* dummy = | 878 LInstruction* dummy = |
877 new(zone()) LDummyUse(UseAny(current->OperandAt(i))); | 879 new(zone()) LDummyUse(UseAny(current->OperandAt(i))); |
878 dummy->set_hydrogen_value(current); | 880 dummy->set_hydrogen_value(current); |
879 chunk_->AddInstruction(dummy, current_block_); | 881 chunk_->AddInstruction(dummy, current_block_); |
880 } | 882 } |
881 } else { | 883 } else { |
882 instr = current->CompileToLithium(this); | 884 instr = current->CompileToLithium(this); |
883 } | 885 } |
884 | 886 |
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2588 | 2590 |
2589 | 2591 |
2590 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) { | 2592 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) { |
2591 LOperand* object = UseRegister(instr->object()); | 2593 LOperand* object = UseRegister(instr->object()); |
2592 LOperand* index = UseRegister(instr->index()); | 2594 LOperand* index = UseRegister(instr->index()); |
2593 return DefineAsRegister(new(zone()) LLoadFieldByIndex(object, index)); | 2595 return DefineAsRegister(new(zone()) LLoadFieldByIndex(object, index)); |
2594 } | 2596 } |
2595 | 2597 |
2596 | 2598 |
2597 } } // namespace v8::internal | 2599 } } // namespace v8::internal |
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