Refactor transitioning stores.

src/ia32/lithium-codegen-ia32.cc

Index: src/ia32/lithium-codegen-ia32.cc
diff --git a/src/ia32/lithium-codegen-ia32.cc b/src/ia32/lithium-codegen-ia32.cc
index 906ee3e97b8efb5d53f5d487e27ea00cab968908..b79fc33c7f0406e6295c11b88191366d30c8428a 100644
--- a/src/ia32/lithium-codegen-ia32.cc
+++ b/src/ia32/lithium-codegen-ia32.cc
@@ -4003,34 +4003,12 @@ void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) {
     }
   } else if (representation.IsDouble()) {
     ASSERT(access.IsInobject());
-    ASSERT(!instr->hydrogen()->has_transition());
     ASSERT(!instr->hydrogen()->NeedsWriteBarrier());
     XMMRegister value = ToDoubleRegister(instr->value());
     __ movsd(FieldOperand(object, offset), value);
     return;
   }
 
-  if (instr->hydrogen()->has_transition()) {
-    Handle<Map> transition = instr->hydrogen()->transition_map();
-    AddDeprecationDependency(transition);
-    if (!instr->hydrogen()->NeedsWriteBarrierForMap()) {
-      __ mov(FieldOperand(object, HeapObject::kMapOffset), transition);
-    } else {
-      Register temp = ToRegister(instr->temp());
-      Register temp_map = ToRegister(instr->temp_map());
-      __ mov(temp_map, transition);
-      __ mov(FieldOperand(object, HeapObject::kMapOffset), temp_map);
-      // Update the write barrier for the map field.
-      __ RecordWriteField(object,
-                          HeapObject::kMapOffset,
-                          temp_map,
-                          temp,
-                          kSaveFPRegs,
-                          OMIT_REMEMBERED_SET,
-                          OMIT_SMI_CHECK);
-    }
-  }
-
   // Do the store.
   Register write_register = object;
   if (!access.IsInobject()) {