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 3 // found in the LICENSE file. 4 5 #ifndef V8_CRANKSHAFT_HYDROGEN_UINT32_ANALYSIS_H_ 6 #define V8_CRANKSHAFT_HYDROGEN_UINT32_ANALYSIS_H_ 7 8 #include "src/crankshaft/hydrogen.h" 9 10 namespace v8 { 11 namespace internal { 12 13 14 // Discover instructions that can be marked with kUint32 flag allowing 15 // them to produce full range uint32 values. 16 class HUint32AnalysisPhase : public HPhase { 17 public: 18 explicit HUint32AnalysisPhase(HGraph* graph) 19 : HPhase("H_Compute safe UInt32 operations", graph), phis_(4, zone()) { } 20 21 void Run(); 22 23 private: 24 INLINE(bool IsSafeUint32Use(HValue* val, HValue* use)); 25 INLINE(bool Uint32UsesAreSafe(HValue* uint32val)); 26 INLINE(bool CheckPhiOperands(HPhi* phi)); 27 INLINE(void UnmarkPhi(HPhi* phi, ZoneList<HPhi*>* worklist)); 28 INLINE(void UnmarkUnsafePhis()); 29 30 ZoneList<HPhi*> phis_; 31 }; 32 33 34 } // namespace internal 35 } // namespace v8 36 37 #endif // V8_CRANKSHAFT_HYDROGEN_UINT32_ANALYSIS_H_ 38
