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// 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_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_
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