v8/src/hydrogen-range-analysis.h

63 lines
2.4 KiB
C++

// Copyright 2013 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#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() {
Analyze(graph()->entry_block());
}
private:
void TraceRange(const char* msg, ...);
void Analyze(HBasicBlock* block);
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_