f60609bd1b
R=jkummerow@chromium.org Review URL: https://codereview.chromium.org/18487003 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15441 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
60 lines
2.4 KiB
C++
60 lines
2.4 KiB
C++
// Copyright 2013 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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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 "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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