Pass checked values to HLoadNamedField, removing the need for extra type-check field.

src/code-stubs-hydrogen.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 334 matching lines @@
                                                   static_cast<HValue*>(NULL),
                                                   FAST_ELEMENTS);
   IfBuilder checker(this);
   checker.IfNot<HCompareObjectEqAndBranch, HValue*>(allocation_site,
                                                     undefined);
   checker.Then();
 
   HObjectAccess access = HObjectAccess::ForAllocationSiteTransitionInfo();
   HInstruction* boilerplate = Add<HLoadNamedField>(allocation_site, access);
   if (mode == FastCloneShallowArrayStub::CLONE_ANY_ELEMENTS) {
-    HValue* elements = AddLoadElements(boilerplate, NULL);
+    HValue* elements = AddLoadElements(boilerplate);
 
     IfBuilder if_fixed_cow(this);
     if_fixed_cow.If<HCompareMap>(elements, factory->fixed_cow_array_map());
     if_fixed_cow.Then();
     environment()->Push(BuildCloneShallowArray(boilerplate,
                                                allocation_site,
                                                alloc_site_mode,
                                                FAST_ELEMENTS,
                                                0/*copy-on-write*/));
     if_fixed_cow.Else();
@@ skipping 140 matching lines @@
   return DoGenerateCode(this);
 }
 
 
 template<>
 HValue* CodeStubGraphBuilder<LoadFieldStub>::BuildCodeStub() {
   Representation rep = casted_stub()->representation();
   HObjectAccess access = casted_stub()->is_inobject() ?
       HObjectAccess::ForJSObjectOffset(casted_stub()->offset(), rep) :
       HObjectAccess::ForBackingStoreOffset(casted_stub()->offset(), rep);
-  return AddInstruction(BuildLoadNamedField(GetParameter(0), access, NULL));
+  return AddInstruction(BuildLoadNamedField(GetParameter(0), access));
 }
 
 
 Handle<Code> LoadFieldStub::GenerateCode() {
   return DoGenerateCode(this);
 }
 
 
 template<>
 HValue* CodeStubGraphBuilder<KeyedLoadFieldStub>::BuildCodeStub() {
   Representation rep = casted_stub()->representation();
   HObjectAccess access = casted_stub()->is_inobject() ?
       HObjectAccess::ForJSObjectOffset(casted_stub()->offset(), rep) :
       HObjectAccess::ForBackingStoreOffset(casted_stub()->offset(), rep);
-  return AddInstruction(BuildLoadNamedField(GetParameter(0), access, NULL));
+  return AddInstruction(BuildLoadNamedField(GetParameter(0), access));
 }
 
 
 Handle<Code> KeyedLoadFieldStub::GenerateCode() {
   return DoGenerateCode(this);
 }
 
 
 template <>
 HValue* CodeStubGraphBuilder<KeyedStoreFastElementStub>::BuildCodeStub() {
@@ skipping 356 matching lines @@
   return value;
 }
 
 
 Handle<Code> ElementsTransitionAndStoreStub::GenerateCode() {
   return DoGenerateCode(this);
 }
 
 
 } }  // namespace v8::internal