Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 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_ |