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// 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_CRANKSHAFT_HYDROGEN_UINT32_ANALYSIS_H_
#define V8_CRANKSHAFT_HYDROGEN_UINT32_ANALYSIS_H_
#include "src/crankshaft/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 internal
} // namespace v8
#endif // V8_CRANKSHAFT_HYDROGEN_UINT32_ANALYSIS_H_
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