[ic] Encode LoadGlobalIC's typeof mode in slot kind instead of code object's flags.

src/full-codegen/full-codegen.cc

 // Copyright 2012 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/full-codegen/full-codegen.h"
 
 #include "src/ast/ast-numbering.h"
 #include "src/ast/ast.h"
 #include "src/ast/prettyprinter.h"
 #include "src/ast/scopes.h"
@@ skipping 467 matching lines @@
   Comment cmnt(masm_, "[ VariableProxy");
   EmitVariableLoad(expr);
 }
 
 void FullCodeGenerator::EmitGlobalVariableLoad(VariableProxy* proxy,
                                                TypeofMode typeof_mode) {
   Variable* var = proxy->var();
   DCHECK(var->IsUnallocated());
   __ Move(LoadDescriptor::NameRegister(), var->name());
 
-  EmitLoadSlot(LoadGlobalDescriptor::SlotRegister(),
-               proxy->VariableFeedbackSlot());
+  FeedbackVectorSlot slot = proxy->VariableFeedbackSlot();
+  // Ensure that typeof mode is in sync with the IC slot kind.
+  DCHECK_EQ(GetTypeofModeFromICKind(feedback_vector_spec()->GetKind(slot)),
+            typeof_mode);
+
+  EmitLoadSlot(LoadGlobalDescriptor::SlotRegister(), slot);
   Handle<Code> code = CodeFactory::LoadGlobalIC(isolate(), typeof_mode).code();
   __ Call(code, RelocInfo::CODE_TARGET);
   RestoreContext();
 }
 
 void FullCodeGenerator::VisitSloppyBlockFunctionStatement(
     SloppyBlockFunctionStatement* declaration) {
   Visit(declaration->statement());
 }
 
@@ skipping 1113 matching lines @@
 
 const FeedbackVectorSpec* FullCodeGenerator::feedback_vector_spec() const {
   return literal()->feedback_vector_spec();
 }
 
 #undef __
 
 
 }  // namespace internal
 }  // namespace v8