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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 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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3926 | 3926 |
3927 #ifdef DEBUG | 3927 #ifdef DEBUG |
3928 for (int i = 0; i < block->phis()->length(); i++) { | 3928 for (int i = 0; i < block->phis()->length(); i++) { |
3929 HPhi* phi = block->phis()->at(i); | 3929 HPhi* phi = block->phis()->at(i); |
3930 ASSERT(phi->ActualValue() == phi); | 3930 ASSERT(phi->ActualValue() == phi); |
3931 } | 3931 } |
3932 #endif | 3932 #endif |
3933 | 3933 |
3934 for (HInstructionIterator it(block); !it.Done(); it.Advance()) { | 3934 for (HInstructionIterator it(block); !it.Done(); it.Advance()) { |
3935 HInstruction* instruction = it.Current(); | 3935 HInstruction* instruction = it.Current(); |
3936 if (instruction->ActualValue() != instruction) { | 3936 if (instruction->ActualValue() == instruction) continue; |
| 3937 if (instruction->CheckFlag(HValue::kIsDead)) { |
| 3938 // The instruction was marked as deleted but left in the graph |
| 3939 // as a control flow dependency point for subsequent |
| 3940 // instructions. |
| 3941 instruction->DeleteAndReplaceWith(instruction->ActualValue()); |
| 3942 } else { |
3937 ASSERT(instruction->IsInformativeDefinition()); | 3943 ASSERT(instruction->IsInformativeDefinition()); |
3938 if (instruction->IsPurelyInformativeDefinition()) { | 3944 if (instruction->IsPurelyInformativeDefinition()) { |
3939 instruction->DeleteAndReplaceWith(instruction->RedefinedOperand()); | 3945 instruction->DeleteAndReplaceWith(instruction->RedefinedOperand()); |
3940 } else { | 3946 } else { |
3941 instruction->ReplaceAllUsesWith(instruction->ActualValue()); | 3947 instruction->ReplaceAllUsesWith(instruction->ActualValue()); |
3942 } | 3948 } |
3943 } | 3949 } |
3944 } | 3950 } |
3945 } | 3951 } |
3946 } | 3952 } |
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11118 if (ShouldProduceTraceOutput()) { | 11124 if (ShouldProduceTraceOutput()) { |
11119 isolate()->GetHTracer()->TraceHydrogen(name(), graph_); | 11125 isolate()->GetHTracer()->TraceHydrogen(name(), graph_); |
11120 } | 11126 } |
11121 | 11127 |
11122 #ifdef DEBUG | 11128 #ifdef DEBUG |
11123 graph_->Verify(false); // No full verify. | 11129 graph_->Verify(false); // No full verify. |
11124 #endif | 11130 #endif |
11125 } | 11131 } |
11126 | 11132 |
11127 } } // namespace v8::internal | 11133 } } // namespace v8::internal |
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