Adding Smi support to Add, Sub, Mul, and Bitwise

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 30b889ffa67fdecf62b8e9df5e71d7b05de5afab..4033fe658d94c0d6ddf835a23e2939d7687ae18c 100644
--- a/src/ia32/lithium-codegen-ia32.h
+++ b/src/ia32/lithium-codegen-ia32.h
@@ -109,11 +109,8 @@ 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));
   }
   double ToDouble(LConstantOperand* op) const;
 
@@ -297,6 +294,7 @@ class LCodeGen BASE_EMBEDDED {
   Register ToRegister(int index) const;
   XMMRegister ToDoubleRegister(int index) const;
   X87Register ToX87Register(int index) const;
+  int ToRepresentation(LConstantOperand* op, const Representation& r) const;
   int ToInteger32(LConstantOperand* op) const;
 
   Operand BuildFastArrayOperand(LOperand* elements_pointer,