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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_CHECK_ELIMINATION_H_
#define V8_HYDROGEN_CHECK_ELIMINATION_H_
#include "hydrogen.h"
#include "hydrogen-alias-analysis.h"
namespace v8 {
namespace internal {
// Remove CheckMaps instructions through flow- and branch-sensitive analysis.
class HCheckEliminationPhase : public HPhase {
public:
explicit HCheckEliminationPhase(HGraph* graph)
: HPhase("H_Check Elimination", graph), aliasing_() {
#ifdef DEBUG
redundant_ = 0;
removed_ = 0;
removed_cho_ = 0;
narrowed_ = 0;
loads_ = 0;
empty_ = 0;
compares_true_ = 0;
compares_false_ = 0;
transitions_ = 0;
#endif
}
void Run();
friend class HCheckTable;
private:
void PrintStats();
HAliasAnalyzer* aliasing_;
#ifdef DEBUG
int redundant_;
int removed_;
int removed_cho_;
int narrowed_;
int loads_;
int empty_;
int compares_true_;
int compares_false_;
int transitions_;
#endif
};
} } // namespace v8::internal
#endif // V8_HYDROGEN_CHECK_ELIMINATION_H_
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