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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_HYDROGEN_UINT32_ANALYSIS_H_ | |
6 #define V8_HYDROGEN_UINT32_ANALYSIS_H_ | |
7 | |
8 #include "src/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_HYDROGEN_UINT32_ANALYSIS_H_ | |
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