[ic] Let LoadGlobalIC load the variable name from TypeFeedbackMetadata.

src/runtime/runtime-object.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/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/bootstrapper.h"
 #include "src/debug/debug.h"
 #include "src/isolate-inl.h"
@@ skipping 332 matching lines @@
 
   CONVERT_ARG_HANDLE_CHECKED(Object, object, 0);
   CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
 
   RETURN_RESULT_OR_FAILURE(isolate,
                            Runtime::GetObjectProperty(isolate, object, key));
 }
 
 namespace {
 
-Object* GetGlobal(Isolate* isolate, Handle<String> name,
+Object* GetGlobal(Isolate* isolate, int slot, Handle<TypeFeedbackVector> vector,
                   bool should_throw_reference_error) {
+  FeedbackVectorSlot vector_slot = vector->ToSlot(slot);
+  DCHECK_EQ(FeedbackVectorSlotKind::LOAD_GLOBAL_IC,
+            vector->GetKind(vector_slot));
+  Handle<String> name(vector->GetName(vector_slot), isolate);
+  DCHECK_NE(*name, *isolate->factory()->empty_string());
+
   Handle<JSGlobalObject> global = isolate->global_object();
 
   Handle<ScriptContextTable> script_contexts(
       global->native_context()->script_context_table());
 
   ScriptContextTable::LookupResult lookup_result;
   if (ScriptContextTable::Lookup(script_contexts, name, &lookup_result)) {
     Handle<Context> script_context = ScriptContextTable::GetContext(
         script_contexts, lookup_result.context_index);
     Handle<Object> result =
@@ skipping 10 matching lines @@
       isolate, result,
       Runtime::GetObjectProperty(isolate, global, name,
                                  should_throw_reference_error));
   return *result;
 }
 
 }  // namespace
 
 RUNTIME_FUNCTION(Runtime_GetGlobalInsideTypeof) {
   HandleScope scope(isolate);
-  DCHECK_EQ(1, args.length());
-  CONVERT_ARG_HANDLE_CHECKED(String, name, 0);
-  return GetGlobal(isolate, name, false);
+  DCHECK_EQ(2, args.length());
+  CONVERT_SMI_ARG_CHECKED(slot, 0);
+  CONVERT_ARG_HANDLE_CHECKED(TypeFeedbackVector, vector, 1);
+  return GetGlobal(isolate, slot, vector, false);
 }
 
 RUNTIME_FUNCTION(Runtime_GetGlobalNotInsideTypeof) {
   HandleScope scope(isolate);
-  DCHECK_EQ(1, args.length());
-  CONVERT_ARG_HANDLE_CHECKED(String, name, 0);
-  return GetGlobal(isolate, name, true);
+  DCHECK_EQ(2, args.length());
+  CONVERT_SMI_ARG_CHECKED(slot, 0);
+  CONVERT_ARG_HANDLE_CHECKED(TypeFeedbackVector, vector, 1);
+  return GetGlobal(isolate, slot, vector, true);
 }
 
 // KeyedGetProperty is called from KeyedLoadIC::GenerateGeneric.
 RUNTIME_FUNCTION(Runtime_KeyedGetProperty) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 2);
 
   CONVERT_ARG_HANDLE_CHECKED(Object, receiver_obj, 0);
   CONVERT_ARG_HANDLE_CHECKED(Object, key_obj, 1);
 
@@ skipping 585 matching lines @@
       isolate, o, key, &success, LookupIterator::OWN);
   if (!success) return isolate->heap()->exception();
   MAYBE_RETURN(
       JSReceiver::CreateDataProperty(&it, value, Object::THROW_ON_ERROR),
       isolate->heap()->exception());
   return *value;
 }
 
 }  // namespace internal
 }  // namespace v8