X64: Add smi-type to loop variable of simple smi for-loops.

src/x64/codegen-x64.h

 // Copyright 2010 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
@@ skipping 595 matching lines @@
 
   // Methods used to indicate which source code is generated for. Source
   // positions are collected by the assembler and emitted with the relocation
   // information.
   void CodeForFunctionPosition(FunctionLiteral* fun);
   void CodeForReturnPosition(FunctionLiteral* fun);
   void CodeForStatementPosition(Statement* node);
   void CodeForDoWhileConditionPosition(DoWhileStatement* stmt);
   void CodeForSourcePosition(int pos);
 
+  void SetTypeForStackSlot(Slot* slot, TypeInfo info);
+
 #ifdef DEBUG
   // True if the registers are valid for entry to a block.  There should
   // be no frame-external references to (non-reserved) registers.
   bool HasValidEntryRegisters();
 #endif
 
   ZoneList<DeferredCode*> deferred_;
 
   // Assembler
   MacroAssembler* masm_;  // to generate code
@@ skipping 319 matching lines @@
   void Print() {
     PrintF("NumberToStringStub\n");
   }
 #endif
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_CODEGEN_X64_H_