[turbofan] Properly type field access to stable heap object maps.

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 {
 
 // static
 FieldAccess AccessBuilder::ForMap() {
   FieldAccess access = {kTaggedBase, HeapObject::kMapOffset,
-                        MaybeHandle<Name>(), Type::Any(), kMachAnyTagged};
+                        MaybeHandle<Name>(), Type::Internal(), kMachAnyTagged};
   return access;
 }
 
 
 // static
 FieldAccess AccessBuilder::ForJSObjectProperties() {
   FieldAccess access = {kTaggedBase, JSObject::kPropertiesOffset,
                         MaybeHandle<Name>(), Type::Any(), kMachAnyTagged};
   return access;
 }
@@ skipping 273 matching lines @@
 // static
 FieldAccess AccessBuilder::ForFrameMarker() {
   FieldAccess access = {kUntaggedBase, StandardFrameConstants::kMarkerOffset,
                         MaybeHandle<Name>(), Type::Tagged(), kMachAnyTagged};
   return access;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8