PPC: Fix "Support for global var shortcuts in script contexts."

src/ppc/full-codegen-ppc.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/v8.h"
 
 #if V8_TARGET_ARCH_PPC
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
@@ skipping 2728 matching lines @@
     __ mr(r6, result_register());
     int offset = Context::SlotOffset(var->index());
     __ RecordWriteContextSlot(r4, offset, r6, r5, kLRHasBeenSaved,
                               kDontSaveFPRegs);
   }
 }
 
 
 void FullCodeGenerator::EmitVariableAssignment(Variable* var, Token::Value op,
                                                FeedbackVectorICSlot slot) {
-  if (var->IsUnallocated()) {
+  if (var->IsUnallocatedOrGlobalSlot()) {
     // Global var, const, or let.
     __ mov(StoreDescriptor::NameRegister(), Operand(var->name()));
     __ LoadP(StoreDescriptor::ReceiverRegister(), GlobalObjectOperand());
     if (FLAG_vector_stores) EmitLoadStoreICSlot(slot);
     CallStoreIC();
 
   } else if (var->mode() == LET && op != Token::INIT_LET) {
     // Non-initializing assignment to let variable needs a write barrier.
     DCHECK(!var->IsLookupSlot());
     DCHECK(var->IsStackAllocated() || var->IsContextSlot());
@@ skipping 2079 matching lines @@
         __ LoadSmiLiteral(r4, Smi::FromInt(language_mode()));
         __ push(r4);
         __ InvokeBuiltin(Builtins::DELETE, CALL_FUNCTION);
         context()->Plug(r3);
       } else if (proxy != NULL) {
         Variable* var = proxy->var();
         // Delete of an unqualified identifier is disallowed in strict mode but
         // "delete this" is allowed.
         bool is_this = var->HasThisName(isolate());
         DCHECK(is_sloppy(language_mode()) || is_this);
-        if (var->IsUnallocated()) {
+        if (var->IsUnallocatedOrGlobalSlot()) {
           __ LoadP(r5, GlobalObjectOperand());
           __ mov(r4, Operand(var->name()));
           __ LoadSmiLiteral(r3, Smi::FromInt(SLOPPY));
           __ Push(r5, r4, r3);
           __ InvokeBuiltin(Builtins::DELETE, CALL_FUNCTION);
           context()->Plug(r3);
         } else if (var->IsStackAllocated() || var->IsContextSlot()) {
           // Result of deleting non-global, non-dynamic variables is false.
           // The subexpression does not have side effects.
           context()->Plug(is_this);
@@ skipping 335 matching lines @@
       break;
     }
   }
 }
 
 
 void FullCodeGenerator::VisitForTypeofValue(Expression* expr) {
   DCHECK(!context()->IsEffect());
   DCHECK(!context()->IsTest());
   VariableProxy* proxy = expr->AsVariableProxy();
-  if (proxy != NULL && proxy->var()->IsUnallocated()) {
+  if (proxy != NULL && proxy->var()->IsUnallocatedOrGlobalSlot()) {
     Comment cmnt(masm_, "[ Global variable");
     __ LoadP(LoadDescriptor::ReceiverRegister(), GlobalObjectOperand());
     __ mov(LoadDescriptor::NameRegister(), Operand(proxy->name()));
     __ mov(LoadDescriptor::SlotRegister(),
            Operand(SmiFromSlot(proxy->VariableFeedbackSlot())));
     // Use a regular load, not a contextual load, to avoid a reference
     // error.
     CallLoadIC(NOT_CONTEXTUAL);
     PrepareForBailout(expr, TOS_REG);
     context()->Plug(r3);
@@ skipping 379 matching lines @@
     return ON_STACK_REPLACEMENT;
   }
 
   DCHECK(interrupt_address ==
          isolate->builtins()->OsrAfterStackCheck()->entry());
   return OSR_AFTER_STACK_CHECK;
 }
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_TARGET_ARCH_PPC