xref: /external/chromium_org/v8/src/hydrogen-uint32-analysis.h

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#ifndef V8_HYDROGEN_UINT32_ANALYSIS_H_
#define V8_HYDROGEN_UINT32_ANALYSIS_H_

#include "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_