Separating transitions from descriptors.

src/ia32/lithium-codegen-ia32.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 2392 matching lines @@
   }
 }
 
 
 void LCodeGen::EmitLoadFieldOrConstantFunction(Register result,
                                                Register object,
                                                Handle<Map> type,
                                                Handle<String> name,
                                                LEnvironment* env) {
   LookupResult lookup(isolate());
-  type->LookupInDescriptors(NULL, *name, &lookup);
+  type->LookupTransitionOrDescriptor(NULL, *name, &lookup);
   ASSERT(lookup.IsFound() || lookup.IsCacheable());
   if (lookup.IsField()) {
     int index = lookup.GetLocalFieldIndexFromMap(*type);
     int offset = index * kPointerSize;
     if (index < 0) {
       // Negative property indices are in-object properties, indexed
       // from the end of the fixed part of the object.
       __ mov(result, FieldOperand(object, offset + type->instance_size()));
     } else {
       // Non-negative property indices are in the properties array.
@@ skipping 40 matching lines @@
 
 // Check for cases where EmitLoadFieldOrConstantFunction needs to walk the
 // prototype chain, which causes unbounded code generation.
 static bool CompactEmit(SmallMapList* list,
                         Handle<String> name,
                         int i,
                         Isolate* isolate) {
   Handle<Map> map = list->at(i);
   // If the map has ElementsKind transitions, we will generate map checks
   // for each kind in __ CompareMap(..., ALLOW_ELEMENTS_TRANSITION_MAPS).
-  if (map->elements_transition_map() != NULL) return false;
+  if (map->HasElementsTransition()) return false;
   LookupResult lookup(isolate);
-  map->LookupInDescriptors(NULL, *name, &lookup);
+  map->LookupDescriptor(NULL, *name, &lookup);
   return lookup.IsField() || lookup.IsConstantFunction();
 }
 
 
 void LCodeGen::DoLoadNamedFieldPolymorphic(LLoadNamedFieldPolymorphic* instr) {
   Register object = ToRegister(instr->object());
   Register result = ToRegister(instr->result());
 
   int map_count = instr->hydrogen()->types()->length();
   bool need_generic = instr->hydrogen()->need_generic();
@@ skipping 2845 matching lines @@
                               FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32