| // Copyright 2013 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef V8_HYDROGEN_UINT32_ANALYSIS_H_ |
| #define V8_HYDROGEN_UINT32_ANALYSIS_H_ |
| |
| #include "src/hydrogen.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| |
| // Discover instructions that can be marked with kUint32 flag allowing |
| // them to produce full range uint32 values. |
| class HUint32AnalysisPhase : public HPhase { |
| public: |
| explicit HUint32AnalysisPhase(HGraph* graph) |
| : HPhase("H_Compute safe UInt32 operations", graph), phis_(4, zone()) { } |
| |
| void Run(); |
| |
| private: |
| INLINE(bool IsSafeUint32Use(HValue* val, HValue* use)); |
| INLINE(bool Uint32UsesAreSafe(HValue* uint32val)); |
| INLINE(bool CheckPhiOperands(HPhi* phi)); |
| INLINE(void UnmarkPhi(HPhi* phi, ZoneList<HPhi*>* worklist)); |
| INLINE(void UnmarkUnsafePhis()); |
| |
| ZoneList<HPhi*> phis_; |
| }; |
| |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_HYDROGEN_UINT32_ANALYSIS_H_ |