[turbofan] Lower JSLoadMessage/JSStoreMessage earlier.

src/compiler/js-generic-lowering.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/js-generic-lowering.h"
 
 #include "src/ast/ast.h"
 #include "src/builtins/builtins-constructor.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
@@ skipping 528 matching lines @@
 void JSGenericLowering::LowerJSForInNext(Node* node) {
   ReplaceWithRuntimeCall(node, Runtime::kForInNext);
 }
 
 
 void JSGenericLowering::LowerJSForInPrepare(Node* node) {
   ReplaceWithRuntimeCall(node, Runtime::kForInPrepare);
 }
 
 void JSGenericLowering::LowerJSLoadMessage(Node* node) {
-  ExternalReference message_address =
-      ExternalReference::address_of_pending_message_obj(isolate());
-  node->RemoveInput(NodeProperties::FirstContextIndex(node));
-  node->InsertInput(zone(), 0, jsgraph()->ExternalConstant(message_address));
-  node->InsertInput(zone(), 1, jsgraph()->IntPtrConstant(0));
-  NodeProperties::ChangeOp(node, machine()->Load(MachineType::AnyTagged()));
+  UNREACHABLE();  // Eliminated in typed lowering.
 }
 
 
 void JSGenericLowering::LowerJSStoreMessage(Node* node) {
-  ExternalReference message_address =
-      ExternalReference::address_of_pending_message_obj(isolate());
-  node->RemoveInput(NodeProperties::FirstContextIndex(node));
-  node->InsertInput(zone(), 0, jsgraph()->ExternalConstant(message_address));
-  node->InsertInput(zone(), 1, jsgraph()->IntPtrConstant(0));
-  StoreRepresentation representation(MachineRepresentation::kTagged,
-                                     kNoWriteBarrier);
-  NodeProperties::ChangeOp(node, machine()->Store(representation));
+  UNREACHABLE();  // Eliminated in typed lowering.
 }
 
 void JSGenericLowering::LowerJSLoadModule(Node* node) {
   UNREACHABLE();  // Eliminated in typed lowering.
 }
 
 void JSGenericLowering::LowerJSStoreModule(Node* node) {
   UNREACHABLE();  // Eliminated in typed lowering.
 }
 
@@ skipping 66 matching lines @@
 }
 
 
 MachineOperatorBuilder* JSGenericLowering::machine() const {
   return jsgraph()->machine();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8