[turbofan] only use two gaps

src/compiler/register-allocator.h

 // Copyright 2014 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_REGISTER_ALLOCATOR_H_
 #define V8_REGISTER_ALLOCATOR_H_
 
 #include "src/compiler/instruction.h"
 #include "src/zone-containers.h"
 
@@ skipping 546 matching lines @@
   bool IsBlockBoundary(LifetimePosition pos);
 
   // Helper methods for resolving control flow.
   void ResolveControlFlow(const InstructionBlock* block,
                           InstructionOperand* cur_op,
                           const InstructionBlock* pred,
                           InstructionOperand* pred_op);
 
   void SetLiveRangeAssignedRegister(LiveRange* range, int reg);
 
-  // Return parallel move that should be used to connect ranges split at the
-  // given position.
-  ParallelMove* GetConnectingParallelMove(LifetimePosition pos);
-
   // Return the block which contains give lifetime position.
   const InstructionBlock* GetInstructionBlock(LifetimePosition pos);
 
   // Helper methods for the fixed registers.
   int RegisterCount() const;
   static int FixedLiveRangeID(int index) { return -index - 1; }
   int FixedDoubleLiveRangeID(int index);
   LiveRange* FixedLiveRangeFor(int index);
   LiveRange* FixedDoubleLiveRangeFor(int index);
   LiveRange* LiveRangeFor(int index);
@@ skipping 64 matching lines @@
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(RegisterAllocator);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_REGISTER_ALLOCATOR_H_