Move representation into HObjectAccess and remove from HLoadNamedField and HStoreNamedField.

src/hydrogen-instructions.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3769 matching lines @@
 
 
 HObjectAccess HObjectAccess::ForFixedArrayHeader(int offset) {
   ASSERT(offset >= 0);
   ASSERT(offset < FixedArray::kHeaderSize);
   if (offset == FixedArray::kLengthOffset) return ForFixedArrayLength();
   return HObjectAccess(kInobject, offset);
 }
 
 
-HObjectAccess HObjectAccess::ForJSObjectOffset(int offset) {
+HObjectAccess HObjectAccess::ForJSObjectOffset(int offset,
+    Representation representation) {
   ASSERT(offset >= 0);
   Portion portion = kInobject;
 
   if (offset == JSObject::kElementsOffset) {
     portion = kElementsPointer;
   } else if (offset == JSObject::kMapOffset) {
     portion = kMaps;
   }
-  return HObjectAccess(portion, offset, Handle<String>::null());
+  return HObjectAccess(portion, offset, representation);
 }
 
 
 HObjectAccess HObjectAccess::ForJSArrayOffset(int offset) {
   ASSERT(offset >= 0);
   Portion portion = kInobject;
 
   if (offset == JSObject::kElementsOffset) {
     portion = kElementsPointer;
   } else if (offset == JSArray::kLengthOffset) {
     portion = kArrayLengths;
   } else if (offset == JSObject::kMapOffset) {
     portion = kMaps;
   }
-  return HObjectAccess(portion, offset, Handle<String>::null());
+  return HObjectAccess(portion, offset);
 }
 
 
-HObjectAccess HObjectAccess::ForBackingStoreOffset(int offset) {
+HObjectAccess HObjectAccess::ForBackingStoreOffset(int offset,
+    Representation representation) {
   ASSERT(offset >= 0);
-  return HObjectAccess(kBackingStore, offset, Handle<String>::null());
+  return HObjectAccess(kBackingStore, offset, representation);
 }
 
 
 HObjectAccess HObjectAccess::ForField(Handle<Map> map,
     LookupResult *lookup, Handle<String> name) {
   ASSERT(lookup->IsField() || lookup->IsTransitionToField(*map));
   int index;
+  Representation representation;
   if (lookup->IsField()) {
     index = lookup->GetLocalFieldIndexFromMap(*map);
+    representation = lookup->representation();
   } else {
     Map* transition = lookup->GetTransitionMapFromMap(*map);
     int descriptor = transition->LastAdded();
     index = transition->instance_descriptors()->GetFieldIndex(descriptor) -
         map->inobject_properties();
+    PropertyDetails details =
+        transition->instance_descriptors()->GetDetails(descriptor);
+    representation = details.representation();
   }
   if (index < 0) {
     // Negative property indices are in-object properties, indexed
     // from the end of the fixed part of the object.
     int offset = (index * kPointerSize) + map->instance_size();
-    return HObjectAccess(kInobject, offset);
+    return HObjectAccess(kInobject, offset, representation);
   } else {
     // Non-negative property indices are in the properties array.
     int offset = (index * kPointerSize) + FixedArray::kHeaderSize;
-    return HObjectAccess(kBackingStore, offset, name);
+    return HObjectAccess(kBackingStore, offset, representation, name);
   }
 }
 
 
 HObjectAccess HObjectAccess::ForCellPayload(Isolate* isolate) {
   return HObjectAccess(
       kInobject, Cell::kValueOffset,
+      Representation::Tagged(),
       Handle<String>(isolate->heap()->cell_value_string()));
 }
 
 
 void HObjectAccess::SetGVNFlags(HValue *instr, bool is_store) {
   // set the appropriate GVN flags for a given load or store instruction
   if (is_store) {
     // track dominating allocations in order to eliminate write barriers
     instr->SetGVNFlag(kDependsOnNewSpacePromotion);
     instr->SetFlag(HValue::kTrackSideEffectDominators);
@@ skipping 53 matching lines @@
     case kBackingStore:
       if (!name_.is_null()) stream->Add(*String::cast(*name_)->ToCString());
       stream->Add("[backing-store]");
       break;
   }
 
   stream->Add("@%d", offset());
 }
 
 } }  // namespace v8::internal