Start using the overwrite mode from the full codegens to generate...

src/ia32/code-stubs-ia32.h

Index: src/ia32/code-stubs-ia32.h
===================================================================
--- src/ia32/code-stubs-ia32.h	(revision 5338)
+++ src/ia32/code-stubs-ia32.h	(working copy)
@@ -117,6 +117,11 @@
                       Result* left,
                       Result* right);
 
+  bool ArgsInRegistersSupported() {
+    return op_ == Token::ADD || op_ == Token::SUB
+        || op_ == Token::MUL || op_ == Token::DIV;
+  }
+
  private:
   Token::Value op_;
   OverwriteMode mode_;
@@ -181,10 +186,6 @@
   void GenerateRegisterArgsPush(MacroAssembler* masm);
   void GenerateTypeTransition(MacroAssembler* masm);
 
-  bool ArgsInRegistersSupported() {
-    return op_ == Token::ADD || op_ == Token::SUB
-        || op_ == Token::MUL || op_ == Token::DIV;
-  }
   bool IsOperationCommutative() {
     return (op_ == Token::ADD) || (op_ == Token::MUL);
   }