[turbofan] Make global variable loads and stores explicit.

src/compiler/js-generic-lowering.cc

Index: src/compiler/js-generic-lowering.cc
diff --git a/src/compiler/js-generic-lowering.cc b/src/compiler/js-generic-lowering.cc
index 793727da2c414fd929863bcc38f239462156ac79..4037e84c04e3b991ea85ba8eeb732b960b6625bc 100644
--- a/src/compiler/js-generic-lowering.cc
+++ b/src/compiler/js-generic-lowering.cc
@@ -332,6 +332,17 @@ void JSGenericLowering::LowerJSLoadNamed(Node* node) {
 }
 
 
+void JSGenericLowering::LowerJSLoadGlobal(Node* node) {
+  CallDescriptor::Flags flags = AdjustFrameStatesForCall(node);
+  const LoadNamedParameters& p = LoadGlobalParametersOf(node->op());
+  Callable callable = CodeFactory::LoadICInOptimizedCode(
+      isolate(), p.contextual_mode(), UNINITIALIZED);
+  node->InsertInput(zone(), 1, jsgraph()->HeapConstant(p.name()));
+  node->InsertInput(zone(), 2, jsgraph()->SmiConstant(p.feedback().index()));
+  ReplaceWithStubCall(node, callable, flags);
+}
+
+
 void JSGenericLowering::LowerJSStoreProperty(Node* node) {
   CallDescriptor::Flags flags = AdjustFrameStatesForCall(node);
   const StorePropertyParameters& p = StorePropertyParametersOf(node->op());
@@ -365,6 +376,22 @@ void JSGenericLowering::LowerJSStoreNamed(Node* node) {
 }
 
 
+void JSGenericLowering::LowerJSStoreGlobal(Node* node) {
+  CallDescriptor::Flags flags = AdjustFrameStatesForCall(node);
+  const StoreNamedParameters& p = StoreGlobalParametersOf(node->op());
+  Callable callable = CodeFactory::StoreIC(isolate(), p.language_mode());
+  node->InsertInput(zone(), 1, jsgraph()->HeapConstant(p.name()));
+  if (FLAG_vector_stores) {
+    DCHECK(p.feedback().index() != -1);
+    node->InsertInput(zone(), 3, jsgraph()->SmiConstant(p.feedback().index()));
+  } else {
+    node->RemoveInput(3);
+  }
+  ReplaceWithStubCall(node, callable,
+                      CallDescriptor::kPatchableCallSite | flags);
+}
+
+
 void JSGenericLowering::LowerJSDeleteProperty(Node* node) {
   LanguageMode language_mode = OpParameter<LanguageMode>(node);
   ReplaceWithBuiltinCall(node, Builtins::DELETE, 3);