[turbofan] smash GapInstruction into Instruction

src/compiler/move-optimizer.h

Index: src/compiler/move-optimizer.h
diff --git a/src/compiler/move-optimizer.h b/src/compiler/move-optimizer.h
index e5fa1258e0b5fe8c7c6ed9cf3e7effb5bb39ffc5..952fcc09a2e86a6b2920780c0d6f09d0593d4e67 100644
--- a/src/compiler/move-optimizer.h
+++ b/src/compiler/move-optimizer.h
@@ -19,7 +19,7 @@ class MoveOptimizer FINAL {
 
  private:
   typedef ZoneVector<MoveOperands*> MoveOpVector;
-  typedef ZoneVector<GapInstruction*> GapInstructions;
+  typedef ZoneVector<Instruction*> Instructions;
 
   InstructionSequence* code() const { return code_; }
   Zone* local_zone() const { return local_zone_; }
@@ -30,13 +30,13 @@ class MoveOptimizer FINAL {
   void CompressBlock(InstructionBlock* blocke);
   void CompressMoves(MoveOpVector* eliminated, ParallelMove* left,
                      ParallelMove* right);
-  GapInstruction* LastGap(InstructionBlock* block);
+  Instruction* LastInstruction(InstructionBlock* block);
   void OptimizeMerge(InstructionBlock* block);
-  void FinalizeMoves(GapInstruction* gap);
+  void FinalizeMoves(Instruction* instr);
 
   Zone* const local_zone_;
   InstructionSequence* const code_;
-  GapInstructions to_finalize_;
+  Instructions to_finalize_;
   MoveOpVector temp_vector_0_;
   MoveOpVector temp_vector_1_;