Provide baseline for experimental GC implementation.

src/ia32/code-stubs-ia32.cc

 // Copyright 2010 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 3890 matching lines @@
 
   // ebx: last_match_info backing store (FixedArray)
   // edx: number of capture registers
   // Store the capture count.
   __ SmiTag(edx);  // Number of capture registers to smi.
   __ mov(FieldOperand(ebx, RegExpImpl::kLastCaptureCountOffset), edx);
   __ SmiUntag(edx);  // Number of capture registers back from smi.
   // Store last subject and last input.
   __ mov(eax, Operand(esp, kSubjectOffset));
   __ mov(FieldOperand(ebx, RegExpImpl::kLastSubjectOffset), eax);
+#ifdef ENABLE_CARDMARKING_WRITE_BARRIER
   __ mov(ecx, ebx);
   __ RecordWrite(ecx, RegExpImpl::kLastSubjectOffset, eax, edi);
+#endif
   __ mov(eax, Operand(esp, kSubjectOffset));
   __ mov(FieldOperand(ebx, RegExpImpl::kLastInputOffset), eax);
+#ifdef ENABLE_CARDMARKING_WRITE_BARRIER
   __ mov(ecx, ebx);
   __ RecordWrite(ecx, RegExpImpl::kLastInputOffset, eax, edi);
+#endif
 
   // Get the static offsets vector filled by the native regexp code.
   ExternalReference address_of_static_offsets_vector =
       ExternalReference::address_of_static_offsets_vector();
   __ mov(ecx, Immediate(address_of_static_offsets_vector));
 
   // ebx: last_match_info backing store (FixedArray)
   // ecx: offsets vector
   // edx: number of capture registers
   NearLabel next_capture, done;
@@ skipping 2356 matching lines @@
   // Do a tail call to the rewritten stub.
   __ jmp(Operand(edi));
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32