Split up HLoadNamedField and HStoreNamedField.

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 912ec1e04d87580cce3e34d031f280527c109957..694e1c1b2f9384929bb92b0c11fcc9fb1b9657db 100644
--- a/src/ia32/lithium-ia32.h
+++ b/src/ia32/lithium-ia32.h
@@ -2201,29 +2201,25 @@ class LSmiUntag V8_FINAL : public LTemplateInstruction<1, 1, 0> {
 };
 
 
-class LStoreNamedField V8_FINAL : public LTemplateInstruction<0, 2, 2> {
+class LStoreNamedField V8_FINAL : public LTemplateInstruction<0, 2, 1> {
  public:
   LStoreNamedField(LOperand* obj,
                    LOperand* val,
-                   LOperand* temp,
-                   LOperand* temp_map) {
+                   LOperand* temp) {
     inputs_[0] = obj;
     inputs_[1] = val;
     temps_[0] = temp;
-    temps_[1] = temp_map;
   }
 
   LOperand* object() { return inputs_[0]; }
   LOperand* value() { return inputs_[1]; }
   LOperand* temp() { return temps_[0]; }
-  LOperand* temp_map() { return temps_[1]; }
 
   DECLARE_CONCRETE_INSTRUCTION(StoreNamedField, "store-named-field")
   DECLARE_HYDROGEN_ACCESSOR(StoreNamedField)
 
   virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE;
 
-  Handle<Map> transition() const { return hydrogen()->transition_map(); }
   Representation representation() const {
     return hydrogen()->field_representation();
   }