[turbofan] Optimize JSConvertReceiver if we know something about the receiver.

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 114 matching lines @@
   FieldAccess access = {
       kTaggedBase, String::kLengthOffset, Handle<Name>(),
       Type::Intersect(Type::Range(0, String::kMaxLength, zone),
                       Type::TaggedSigned(), zone),
       kMachAnyTagged};
   return access;
 }
 
 
 // static
+FieldAccess AccessBuilder::ForGlobalObjectGlobalProxy() {
+  FieldAccess access = {kTaggedBase, GlobalObject::kGlobalProxyOffset,
+                        Handle<Name>(), Type::Receiver(), kMachAnyTagged};
+  return access;
+}
+
+
+// static
 FieldAccess AccessBuilder::ForGlobalObjectNativeContext() {
   FieldAccess access = {kTaggedBase, GlobalObject::kNativeContextOffset,
-                        Handle<Name>(), Type::Any(), kMachAnyTagged};
+                        Handle<Name>(), Type::Internal(), kMachAnyTagged};
   return access;
 }
 
 
 // static
 FieldAccess AccessBuilder::ForValue() {
   FieldAccess access = {kTaggedBase, JSValue::kValueOffset, Handle<Name>(),
                         Type::Any(), kMachAnyTagged};
   return access;
 }
@@ skipping 152 matching lines @@
 // static
 FieldAccess AccessBuilder::ForFrameMarker() {
   FieldAccess access = {kUntaggedBase, StandardFrameConstants::kMarkerOffset,
                         MaybeHandle<Name>(), Type::Tagged(), kMachAnyTagged};
   return access;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8