[turbofan] Desugar lookup slot optimization in graph builder.

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/js-generic-lowering.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/machine-operator.h"
@@ skipping 423 matching lines @@
                             graph()->start()));
   }
   node->ReplaceInput(2, NodeProperties::GetValueInput(node, 1));
   node->ReplaceInput(1, jsgraph()->Int32Constant(Context::SlotOffset(
                             static_cast<int>(access.index()))));
   NodeProperties::ChangeOp(node, machine()->Store(StoreRepresentation(
                                      kMachAnyTagged, kFullWriteBarrier)));
 }
 
 
-void JSGenericLowering::LowerJSLoadDynamicGlobal(Node* node) {
-  const DynamicGlobalAccess& access = DynamicGlobalAccessOf(node->op());
+void JSGenericLowering::LowerJSLoadDynamic(Node* node) {
+  const DynamicAccess& access = DynamicAccessOf(node->op());
   Runtime::FunctionId function_id =
       (access.typeof_mode() == NOT_INSIDE_TYPEOF)
           ? Runtime::kLoadLookupSlot
           : Runtime::kLoadLookupSlotNoReferenceError;
   Node* projection = graph()->NewNode(common()->Projection(0), node);
   NodeProperties::ReplaceUses(node, projection, node, node, node);
-  node->RemoveInput(NodeProperties::FirstFrameStateIndex(node) + 1);
   node->RemoveInput(NodeProperties::FirstValueIndex(node));
   node->InsertInput(zone(), 1, jsgraph()->Constant(access.name()));
   ReplaceWithRuntimeCall(node, function_id);
   projection->ReplaceInput(0, node);
 }
 
 
-void JSGenericLowering::LowerJSLoadDynamicContext(Node* node) {
-  const DynamicContextAccess& access = DynamicContextAccessOf(node->op());
-  Node* projection = graph()->NewNode(common()->Projection(0), node);
-  NodeProperties::ReplaceUses(node, projection, node, node, node);
-  node->InsertInput(zone(), 1, jsgraph()->Constant(access.name()));
-  ReplaceWithRuntimeCall(node, Runtime::kLoadLookupSlot);
-  projection->ReplaceInput(0, node);
-}
-
-
 void JSGenericLowering::LowerJSCreate(Node* node) { UNIMPLEMENTED(); }
 
 
 void JSGenericLowering::LowerJSCreateArguments(Node* node) {
   const CreateArgumentsParameters& p = CreateArgumentsParametersOf(node->op());
   switch (p.type()) {
     case CreateArgumentsParameters::kMappedArguments:
       ReplaceWithRuntimeCall(node, Runtime::kNewSloppyArguments_Generic);
       break;
     case CreateArgumentsParameters::kUnmappedArguments:
@@ skipping 360 matching lines @@
 }
 
 
 MachineOperatorBuilder* JSGenericLowering::machine() const {
   return jsgraph()->machine();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8