Avoid one repeated property lookup when computing load ICs.

src/ia32/stub-cache-ia32.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/v8.h"
 
 #if V8_TARGET_ARCH_IA32
 
 #include "src/codegen.h"
 #include "src/ic-inl.h"
@@ skipping 1227 matching lines @@
   }
   __ ret(0);
 }
 
 
 #undef __
 #define __ ACCESS_MASM(masm())
 
 
 Handle<Code> NamedLoadHandlerCompiler::CompileLoadGlobal(
-    Handle<PropertyCell> cell, Handle<Name> name, bool is_dont_delete) {
+    Handle<PropertyCell> cell, Handle<Name> name, bool is_configurable) {
   Label miss;
 
   FrontendHeader(receiver(), name, &miss);
   // Get the value from the cell.
   Register result = StoreIC::ValueRegister();
   if (masm()->serializer_enabled()) {
     __ mov(result, Immediate(cell));
     __ mov(result, FieldOperand(result, PropertyCell::kValueOffset));
   } else {
     __ mov(result, Operand::ForCell(cell));
   }
 
   // Check for deleted property if property can actually be deleted.
-  if (!is_dont_delete) {
+  if (is_configurable) {
     __ cmp(result, factory()->the_hole_value());
     __ j(equal, &miss);
   } else if (FLAG_debug_code) {
     __ cmp(result, factory()->the_hole_value());
     __ Check(not_equal, kDontDeleteCellsCannotContainTheHole);
   }
 
   Counters* counters = isolate()->counters();
   __ IncrementCounter(counters->named_load_global_stub(), 1);
   // The code above already loads the result into the return register.
@@ skipping 109 matching lines @@
   // -----------------------------------
   TailCallBuiltin(masm, Builtins::kKeyedLoadIC_Miss);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32