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-// Copyright 2011 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_MIPS_LITHIUM_GAP_RESOLVER_MIPS_H_
-#define V8_MIPS_LITHIUM_GAP_RESOLVER_MIPS_H_
-
-#include "v8.h"
-
-#include "lithium.h"
-
-namespace v8 {
-namespace internal {
-
-class LCodeGen;
-class LGapResolver;
-
-class LGapResolver 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);
-
- // If a cycle is found in the series of moves, save the blocking value to
- // a scratch register. The cycle must be found by hitting the root of the
- // depth-first search.
- void BreakCycle(int index);
-
- // After a cycle has been resolved, restore the value from the scratch
- // register to its proper destination.
- void RestoreValue();
-
- // Emit a move and remove it from the move graph.
- void EmitMove(int index);
-
- // Verify the move list before performing moves.
- void Verify();
-
- LCodeGen* cgen_;
-
- // List of moves not yet resolved.
- ZoneList<LMoveOperands> moves_;
-
- int root_index_;
- bool in_cycle_;
- LOperand* saved_destination_;
-};
-
-} } // namespace v8::internal
-
-#endif // V8_MIPS_LITHIUM_GAP_RESOLVER_MIPS_H_