[turbofan] Lower JSLoadMessage/JSStoreMessage earlier.

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/compiler/type-cache.h"
 #include "src/contexts.h"
 #include "src/frames.h"
 #include "src/handles-inl.h"
 #include "src/heap/heap.h"
 #include "src/objects-inl.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 // static
 FieldAccess AccessBuilder::ForExternalDoubleValue() {
   FieldAccess access = {kUntaggedBase,       0,
                         MaybeHandle<Name>(), MaybeHandle<Map>(),
                         Type::Number(),      MachineType::Float64(),
                         kNoWriteBarrier};
   return access;
 }
 
 // static
+FieldAccess AccessBuilder::ForExternalTaggedValue() {
+  FieldAccess access = {kUntaggedBase,       0,
+                        MaybeHandle<Name>(), MaybeHandle<Map>(),
+                        Type::Any(),         MachineType::AnyTagged(),
+                        kNoWriteBarrier};
+  return access;
+}
+
+// static
 FieldAccess AccessBuilder::ForExternalUint8Value() {
   FieldAccess access = {kUntaggedBase,           0,
                         MaybeHandle<Name>(),     MaybeHandle<Map>(),
                         TypeCache::Get().kUint8, MachineType::Uint8(),
                         kNoWriteBarrier};
   return access;
 }
 
 // static
 FieldAccess AccessBuilder::ForMap() {
@@ skipping 873 matching lines @@
       MaybeHandle<Map>(),
       Type::SignedSmall(),
       MachineType::TaggedSigned(),
       kNoWriteBarrier};
   return access;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8