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36 lines
994 B
36 lines
994 B
// Copyright 2013 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_HYDROGEN_UINT32_ANALYSIS_H_
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#define V8_HYDROGEN_UINT32_ANALYSIS_H_
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#include "src/hydrogen.h"
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namespace v8 {
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namespace internal {
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// Discover instructions that can be marked with kUint32 flag allowing
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// them to produce full range uint32 values.
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class HUint32AnalysisPhase : public HPhase {
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public:
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explicit HUint32AnalysisPhase(HGraph* graph)
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: HPhase("H_Compute safe UInt32 operations", graph), phis_(4, zone()) { }
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void Run();
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private:
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INLINE(bool IsSafeUint32Use(HValue* val, HValue* use));
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INLINE(bool Uint32UsesAreSafe(HValue* uint32val));
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INLINE(bool CheckPhiOperands(HPhi* phi));
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INLINE(void UnmarkPhi(HPhi* phi, ZoneList<HPhi*>* worklist));
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INLINE(void UnmarkUnsafePhis());
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ZoneList<HPhi*> phis_;
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};
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} } // namespace v8::internal
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#endif // V8_HYDROGEN_UINT32_ANALYSIS_H_
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