Split up HLoadNamedField and HStoreNamedField.

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 bba3acaa9a55ac059287d801acc552a7f6f70d69..8b295bd71bc44c3c7f78d3905becbe679bb33e06 100644
--- a/src/ia32/lithium-codegen-ia32.cc
+++ b/src/ia32/lithium-codegen-ia32.cc
@@ -3292,10 +3292,6 @@ void LCodeGen::DoLoadNamedField(LLoadNamedField* instr) {
   }
 
   Register result = ToRegister(instr->result());
-  if (!access.IsInobject()) {
-    __ mov(result, FieldOperand(object, JSObject::kPropertiesOffset));
-    object = result;
-  }
   __ Load(result, FieldOperand(object, offset), access.representation());
 }
 
@@ -4394,7 +4390,6 @@ void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) {
   }
 
   Register object = ToRegister(instr->object());
-  Handle<Map> transition = instr->transition();
 
   if (FLAG_track_fields && representation.IsSmi()) {
     if (instr->value()->IsConstantOperand()) {
@@ -4417,7 +4412,6 @@ void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) {
       }
     }
   } else if (FLAG_track_double_fields && representation.IsDouble()) {
-    ASSERT(transition.is_null());
     ASSERT(access.IsInobject());
     ASSERT(!instr->hydrogen()->NeedsWriteBarrier());
     if (CpuFeatures::IsSupported(SSE2)) {
@@ -4431,37 +4425,12 @@ void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) {
     return;
   }
 
-  if (!transition.is_null()) {
-    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,
-                          GetSaveFPRegsMode(),
-                          OMIT_REMEMBERED_SET,
-                          OMIT_SMI_CHECK);
-    }
-  }
-
   // Do the store.
   SmiCheck check_needed =
       instr->hydrogen()->value()->IsHeapObject()
           ? OMIT_SMI_CHECK : INLINE_SMI_CHECK;
 
-  Register write_register = object;
-  if (!access.IsInobject()) {
-    write_register = ToRegister(instr->temp());
-    __ mov(write_register, FieldOperand(object, JSObject::kPropertiesOffset));
-  }
-
-  MemOperand operand = FieldOperand(write_register, offset);
+  MemOperand operand = FieldOperand(object, offset);
   if (instr->value()->IsConstantOperand()) {
     LConstantOperand* operand_value = LConstantOperand::cast(instr->value());
     if (operand_value->IsRegister()) {
@@ -4483,9 +4452,9 @@ void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) {
 
   if (instr->hydrogen()->NeedsWriteBarrier()) {
     Register value = ToRegister(instr->value());
-    Register temp = access.IsInobject() ? ToRegister(instr->temp()) : object;
+    Register temp = ToRegister(instr->temp());
     // Update the write barrier for the object for in-object properties.
-    __ RecordWriteField(write_register,
+    __ RecordWriteField(object,
                         offset,
                         value,
                         temp,