[turbofan] Fix stack->stack double moves for pushing on ia32 and x64.

src/compiler/instruction.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_COMPILER_INSTRUCTION_H_
 #define V8_COMPILER_INSTRUCTION_H_
 
 #include <deque>
 #include <iosfwd>
 #include <map>
@@ skipping 1005 matching lines @@
 typedef ZoneDeque<Instruction*> InstructionDeque;
 typedef ZoneDeque<ReferenceMap*> ReferenceMapDeque;
 typedef ZoneVector<FrameStateDescriptor*> DeoptimizationVector;
 typedef ZoneVector<InstructionBlock*> InstructionBlocks;
 
 struct PrintableInstructionSequence;
 
 
 // Represents architecture-specific generated code before, during, and after
 // register allocation.
-// TODO(titzer): s/IsDouble/IsFloat64/
 class InstructionSequence final : public ZoneObject {
  public:
   static InstructionBlocks* InstructionBlocksFor(Zone* zone,
                                                  const Schedule* schedule);
   // Puts the deferred blocks last.
   static void ComputeAssemblyOrder(InstructionBlocks* blocks);
 
   InstructionSequence(Isolate* isolate, Zone* zone,
                       InstructionBlocks* instruction_blocks);
 
@@ skipping 169 matching lines @@
 
 
 std::ostream& operator<<(std::ostream& os,
                          const PrintableInstructionSequence& code);
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_INSTRUCTION_H_