Skip the write barrier for global property cell writes. The heap...

src/arm/stub-cache-arm.cc

 // Copyright 2006-2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 895 matching lines @@
 
   // Check that the map of the global has not changed.
   __ ldr(r1, MemOperand(sp, 0 * kPointerSize));
   __ ldr(r3, FieldMemOperand(r1, HeapObject::kMapOffset));
   __ cmp(r3, Operand(Handle<Map>(object->map())));
   __ b(ne, &miss);
 
   // Store the value in the cell.
   __ mov(r2, Operand(Handle<JSGlobalPropertyCell>(cell)));
   __ str(r0, FieldMemOperand(r2, JSGlobalPropertyCell::kValueOffset));
-  __ mov(r1, Operand(JSGlobalPropertyCell::kValueOffset));
-  __ RecordWrite(r2, r1, r3);
 
   __ Ret();
 
   // Handle store cache miss.
   __ bind(&miss);
   __ DecrementCounter(&Counters::named_store_global_inline, 1, r1, r3);
   __ IncrementCounter(&Counters::named_store_global_inline_miss, 1, r1, r3);
   Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Miss));
   __ Jump(ic, RelocInfo::CODE_TARGET);
 
@@ skipping 356 matching lines @@
   __ Jump(ic, RelocInfo::CODE_TARGET);
 
   // Return the generated code.
   return GetCode(transition == NULL ? FIELD : MAP_TRANSITION, name);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal