[turbofan] Add control input to Load and LoadElements.

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/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph-inl.h"
 #include "src/compiler/js-generic-lowering.h"
 #include "src/compiler/machine-operator.h"
@@ skipping 313 matching lines @@
   CallDescriptor* desc =
       linkage()->GetStubCallDescriptor(d, 0, FlagsForNode(node));
   Node* stub_code = CodeConstant(stub.GetCode());
   PatchInsertInput(node, 0, stub_code);
   PatchOperator(node, common()->Call(desc));
 }
 
 
 void JSGenericLowering::LowerJSLoadContext(Node* node) {
   const ContextAccess& access = ContextAccessOf(node->op());
-  // TODO(mstarzinger): Use simplified operators instead of machine operators
-  // here so that load/store optimization can be applied afterwards.
   for (size_t i = 0; i < access.depth(); ++i) {
     node->ReplaceInput(
         0, graph()->NewNode(
                machine()->Load(kMachAnyTagged),
                NodeProperties::GetValueInput(node, 0),
                Int32Constant(Context::SlotOffset(Context::PREVIOUS_INDEX)),
-               NodeProperties::GetEffectInput(node)));
+               NodeProperties::GetEffectInput(node), graph()->start()));
   }
   node->ReplaceInput(
       1, Int32Constant(Context::SlotOffset(static_cast<int>(access.index()))));
+  node->AppendInput(zone(), graph()->start());
   PatchOperator(node, machine()->Load(kMachAnyTagged));
 }
 
 
 void JSGenericLowering::LowerJSStoreContext(Node* node) {
   const ContextAccess& access = ContextAccessOf(node->op());
-  // TODO(mstarzinger): Use simplified operators instead of machine operators
-  // here so that load/store optimization can be applied afterwards.
   for (size_t i = 0; i < access.depth(); ++i) {
     node->ReplaceInput(
         0, graph()->NewNode(
                machine()->Load(kMachAnyTagged),
                NodeProperties::GetValueInput(node, 0),
                Int32Constant(Context::SlotOffset(Context::PREVIOUS_INDEX)),
-               NodeProperties::GetEffectInput(node)));
+               NodeProperties::GetEffectInput(node), graph()->start()));
   }
   node->ReplaceInput(2, NodeProperties::GetValueInput(node, 1));
   node->ReplaceInput(
       1, Int32Constant(Context::SlotOffset(static_cast<int>(access.index()))));
   PatchOperator(node, machine()->Store(StoreRepresentation(kMachAnyTagged,
                                                            kFullWriteBarrier)));
 }
 
 
 void JSGenericLowering::LowerJSCallConstruct(Node* node) {
@@ skipping 25 matching lines @@
 
 
 void JSGenericLowering::LowerJSCallRuntime(Node* node) {
   const CallRuntimeParameters& p = CallRuntimeParametersOf(node->op());
   ReplaceWithRuntimeCall(node, p.id(), static_cast<int>(p.arity()));
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8