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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 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "src/hydrogen-instructions.h" | 5 #include "src/crankshaft/hydrogen-store-elimination.h" |
| 6 #include "src/hydrogen-store-elimination.h" | 6 |
| 7 #include "src/crankshaft/hydrogen-instructions.h" |
| 7 | 8 |
| 8 namespace v8 { | 9 namespace v8 { |
| 9 namespace internal { | 10 namespace internal { |
| 10 | 11 |
| 11 #define TRACE(x) if (FLAG_trace_store_elimination) PrintF x | 12 #define TRACE(x) if (FLAG_trace_store_elimination) PrintF x |
| 12 | 13 |
| 13 // Performs a block-by-block local analysis for removable stores. | 14 // Performs a block-by-block local analysis for removable stores. |
| 14 void HStoreEliminationPhase::Run() { | 15 void HStoreEliminationPhase::Run() { |
| 15 GVNFlagSet flags; // Use GVN flags as an approximation for some instructions. | 16 GVNFlagSet flags; // Use GVN flags as an approximation for some instructions. |
| 16 flags.RemoveAll(); | 17 flags.RemoveAll(); |
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| 113 if (instr->DependsOnFlags().ContainsAnyOf(flags)) { | 114 if (instr->DependsOnFlags().ContainsAnyOf(flags)) { |
| 114 TRACE(("-- Observed stores at I%d (GVN flags of %s)\n", | 115 TRACE(("-- Observed stores at I%d (GVN flags of %s)\n", |
| 115 instr->id(), instr->Mnemonic())); | 116 instr->id(), instr->Mnemonic())); |
| 116 unobserved_.Rewind(0); | 117 unobserved_.Rewind(0); |
| 117 return; | 118 return; |
| 118 } | 119 } |
| 119 } | 120 } |
| 120 | 121 |
| 121 } // namespace internal | 122 } // namespace internal |
| 122 } // namespace v8 | 123 } // namespace v8 |
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