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

// Copyright 2013 the V8 project authors. All rights reserved.
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#ifndef V8_HYDROGEN_RANGE_ANALYSIS_H_
#define V8_HYDROGEN_RANGE_ANALYSIS_H_

#include "hydrogen.h"

namespace v8 {
namespace internal {


class HRangeAnalysisPhase : public HPhase {
 public:
  explicit HRangeAnalysisPhase(HGraph* graph)
      : HPhase("H_Range analysis", graph), changed_ranges_(16, zone()) { }

  void Run();

 private:
  void TraceRange(const char* msg, ...);
  void InferControlFlowRange(HCompareNumericAndBranch* test,
                             HBasicBlock* dest);
  void UpdateControlFlowRange(Token::Value op, HValue* value, HValue* other);
  void InferRange(HValue* value);
  void RollBackTo(int index);
  void AddRange(HValue* value, Range* range);

  ZoneList<HValue*> changed_ranges_;
};


} }  // namespace v8::internal

#endif  // V8_HYDROGEN_RANGE_ANALYSIS_H_