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// Copyright 2011 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_X64_LITHIUM_GAP_RESOLVER_X64_H_
#define V8_X64_LITHIUM_GAP_RESOLVER_X64_H_
#include "src/lithium.h"
namespace v8 {
namespace internal {
class LCodeGen;
class LGapResolver;
class LGapResolver final BASE_EMBEDDED {
public:
explicit LGapResolver(LCodeGen* owner);
// Resolve a set of parallel moves, emitting assembler instructions.
void Resolve(LParallelMove* parallel_move);
private:
// Build the initial list of moves.
void BuildInitialMoveList(LParallelMove* parallel_move);
// Perform the move at the moves_ index in question (possibly requiring
// other moves to satisfy dependencies).
void PerformMove(int index);
// Emit a move and remove it from the move graph.
void EmitMove(int index);
// Execute a move by emitting a swap of two operands. The move from
// source to destination is removed from the move graph.
void EmitSwap(int index);
// Verify the move list before performing moves.
void Verify();
LCodeGen* cgen_;
// List of moves not yet resolved.
ZoneList<LMoveOperands> moves_;
};
} } // namespace v8::internal
#endif // V8_X64_LITHIUM_GAP_RESOLVER_X64_H_
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