[turbofan] Optimize loads from the global object in JSTypeFeedbackSpecializer.

src/compiler/access-builder.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/access-builder.h"
 #include "src/types-inl.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
@@ skipping 70 matching lines @@
 }
 
 
 // static
 FieldAccess AccessBuilder::ForStatsCounter() {
   return {kUntaggedBase, 0, MaybeHandle<Name>(), Type::Signed32(), kMachInt32};
 }
 
 
 // static
+FieldAccess AccessBuilder::ForPropertyCellValue() {
+  return {kTaggedBase, PropertyCell::kValueOffset, Handle<Name>(), Type::Any(),
+          kMachAnyTagged};
+}
+
+
+// static
 ElementAccess AccessBuilder::ForFixedArrayElement() {
   return {kTaggedBase, FixedArray::kHeaderSize, Type::Any(), kMachAnyTagged};
 }
 
 
 // static
 ElementAccess AccessBuilder::ForTypedArrayElement(ExternalArrayType type,
                                                   bool is_external) {
   BaseTaggedness taggedness = is_external ? kUntaggedBase : kTaggedBase;
   int header_size = is_external ? 0 : FixedTypedArrayBase::kDataOffset;
@@ skipping 31 matching lines @@
       return {kTaggedBase, SeqString::kHeaderSize, Type::Unsigned32(),
               kMachUint16};
   }
   UNREACHABLE();
   return {kUntaggedBase, 0, Type::None(), kMachNone};
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8