Don't explicitly pass requested representations to constants; implement ConstantS

src/ia32/lithium-ia32.h

Index: src/ia32/lithium-ia32.h
diff --git a/src/ia32/lithium-ia32.h b/src/ia32/lithium-ia32.h
index 2ed4cd611c207f07e8f8fb951ea96c9c421ae64a..568ef87b1bf36173a47cfbc8e071f73ef85dad43 100644
--- a/src/ia32/lithium-ia32.h
+++ b/src/ia32/lithium-ia32.h
@@ -82,6 +82,7 @@ class LCodeGen;
   V(CmpConstantEqAndBranch)                     \
   V(ConstantD)                                  \
   V(ConstantI)                                  \
+  V(ConstantS)                                  \
   V(ConstantT)                                  \
   V(Context)                                    \
   V(DebugBreak)                                 \
@@ -1152,6 +1153,15 @@ class LConstantI: public LTemplateInstruction<1, 0, 0> {
 };
 
 
+class LConstantS: public LTemplateInstruction<1, 0, 0> {
+ public:
+  DECLARE_CONCRETE_INSTRUCTION(ConstantS, "constant-s")
+  DECLARE_HYDROGEN_ACCESSOR(Constant)
+
+  Smi* value() const { return Smi::FromInt(hydrogen()->Integer32Value()); }
+};
+
+
 class LConstantD: public LTemplateInstruction<1, 0, 1> {
  public:
   explicit LConstantD(LOperand* temp) {