Add smi support to all binops minus shr, sar, shl, div and mod.

src/ia32/lithium-codegen-ia32.h

Index: src/ia32/lithium-codegen-ia32.h
diff --git a/src/ia32/lithium-codegen-ia32.h b/src/ia32/lithium-codegen-ia32.h
index 647dd0e4c0cc4d18716792c1063fd746371c5e6c..b9ea76cda5bdb8e8accdfe9727f0320a0ef0a743 100644
--- a/src/ia32/lithium-codegen-ia32.h
+++ b/src/ia32/lithium-codegen-ia32.h
@@ -112,11 +112,8 @@ class LCodeGen BASE_EMBEDDED {
 
   bool IsInteger32(LConstantOperand* op) const;
   bool IsSmi(LConstantOperand* op) const;
-  Immediate ToInteger32Immediate(LOperand* op) const {
-    return Immediate(ToInteger32(LConstantOperand::cast(op)));
-  }
-  Immediate ToSmiImmediate(LOperand* op) const {
-    return Immediate(Smi::FromInt(ToInteger32(LConstantOperand::cast(op))));
+  Immediate ToImmediate(LOperand* op, const Representation& r) const {
+    return Immediate(ToRepresentation(LConstantOperand::cast(op), r));
   }
 
   // Support for non-sse2 (x87) floating point stack handling.
@@ -299,6 +296,7 @@ class LCodeGen BASE_EMBEDDED {
 
   Register ToRegister(int index) const;
   XMMRegister ToDoubleRegister(int index) const;
+  int ToRepresentation(LConstantOperand* op, const Representation& r) const;
   int ToInteger32(LConstantOperand* op) const;
 
   double ToDouble(LConstantOperand* op) const;