Remove support for "loads and stores to global vars through property cell shortcuts inst…

src/compiler/js-typed-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/compiler/access-builder.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/js-typed-lowering.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 1024 matching lines @@
                                     check_true);
     Node* if_true = graph()->NewNode(common()->IfTrue(), branch);
     Node* if_false = graph()->NewNode(common()->IfFalse(), branch);
     check_false->AppendInput(graph()->zone(), if_false);
     NodeProperties::ChangeOp(check_false,
                              common()->Merge(check_false->InputCount()));
     check_true = if_true;
   }
 
   // Fast case, because variable is not shadowed. Perform global object load.
-  Node* global = graph()->NewNode(
-      javascript()->LoadContext(0, Context::GLOBAL_OBJECT_INDEX, true), context,
-      context, effect);
   Node* fast = graph()->NewNode(
       javascript()->LoadGlobal(access.name(), access.feedback(),
                                access.typeof_mode()),
-      context, global, vector, context, state1, state2, global, check_true);
+      vector, context, state1, state2, effect, check_true);
 
   // Slow case, because variable potentially shadowed. Perform dynamic lookup.
   uint32_t check_bitset = DynamicGlobalAccess::kFullCheckRequired;
   Node* slow = graph()->NewNode(
       javascript()->LoadDynamicGlobal(access.name(), check_bitset,
                                       access.feedback(), access.typeof_mode()),
       vector, context, context, state1, state2, effect, check_false);
 
   // Replace value, effect and control uses accordingly.
   Node* new_control =
@@ skipping 778 matching lines @@
 }
 
 
 MachineOperatorBuilder* JSTypedLowering::machine() const {
   return jsgraph()->machine();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8