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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_OSR_H_
#define V8_HYDROGEN_OSR_H_
#include "hydrogen.h"
#include "ast.h"
#include "zone.h"
namespace v8 {
namespace internal {
// Responsible for building graph parts related to OSR and otherwise
// setting up the graph to do an OSR compile.
class HOsrBuilder : public ZoneObject {
public:
explicit HOsrBuilder(HOptimizedGraphBuilder* builder)
: builder_(builder),
osr_entry_(NULL),
osr_loop_entry_(NULL),
osr_values_(NULL) { }
// Creates the loop entry block for the given statement, setting up OSR
// entries as necessary, and sets the current block to the new block.
HBasicBlock* BuildPossibleOsrLoopEntry(IterationStatement* statement);
// Process the hydrogen graph after it has been completed, performing
// any OSR-specific cleanups or changes.
void FinishGraph();
// Process the OSR values and phis after initial graph optimization.
void FinishOsrValues();
private:
HBasicBlock* BuildLoopEntry();
bool HasOsrEntryAt(IterationStatement* statement);
HOptimizedGraphBuilder* builder_;
HBasicBlock* osr_entry_;
HBasicBlock* osr_loop_entry_;
ZoneList<HUnknownOSRValue*>* osr_values_;
};
} } // namespace v8::internal
#endif // V8_HYDROGEN_OSR_H_
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