Loads and stores to global vars are now made via property cell shortcuts installed into parent scri…

src/code-stubs.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/code-stubs.h"
 
 #include <sstream>
 
 #include "src/bootstrapper.h"
 #include "src/cpu-profiler.h"
 #include "src/factory.h"
 #include "src/gdb-jit.h"
 #include "src/ic/handler-compiler.h"
 #include "src/ic/ic.h"
 #include "src/macro-assembler.h"
 #include "src/parser.h"
 
 namespace v8 {
 namespace internal {
 
 
+RUNTIME_FUNCTION(UnexpectedStubMiss) {
+  FATAL("Unexpected deopt of a stub");
+  return Smi::FromInt(0);
+}
+
+
 CodeStubDescriptor::CodeStubDescriptor(CodeStub* stub)
     : call_descriptor_(stub->GetCallInterfaceDescriptor()),
       stack_parameter_count_(no_reg),
       hint_stack_parameter_count_(-1),
       function_mode_(NOT_JS_FUNCTION_STUB_MODE),
       deoptimization_handler_(NULL),
       handler_arguments_mode_(DONT_PASS_ARGUMENTS),
       miss_handler_(),
       has_miss_handler_(false) {
   stub->InitializeDescriptor(this);
@@ skipping 681 matching lines @@
 void CreateWeakCellStub::InitializeDescriptor(CodeStubDescriptor* d) {}
 
 
 void RegExpConstructResultStub::InitializeDescriptor(
     CodeStubDescriptor* descriptor) {
   descriptor->Initialize(
       Runtime::FunctionForId(Runtime::kRegExpConstructResultRT)->entry);
 }
 
 
+void LoadGlobalViaContextStub::InitializeDescriptor(
+    CodeStubDescriptor* descriptor) {
+  // Must never deoptimize.
+  descriptor->Initialize(FUNCTION_ADDR(UnexpectedStubMiss));
+}
+
+
+void StoreGlobalViaContextStub::InitializeDescriptor(
+    CodeStubDescriptor* descriptor) {
+  // Must never deoptimize.
+  descriptor->Initialize(FUNCTION_ADDR(UnexpectedStubMiss));
+}
+
+
 void TransitionElementsKindStub::InitializeDescriptor(
     CodeStubDescriptor* descriptor) {
   descriptor->Initialize(
       Runtime::FunctionForId(Runtime::kTransitionElementsKind)->entry);
 }
 
 
 void AllocateHeapNumberStub::InitializeDescriptor(
     CodeStubDescriptor* descriptor) {
   descriptor->Initialize(
@@ skipping 328 matching lines @@
 
   if (type->Is(Type::UntaggedPointer())) {
     return Representation::External();
   }
 
   DCHECK(!type->Is(Type::Untagged()));
   return Representation::Tagged();
 }
 }  // namespace internal
 }  // namespace v8