ARM: Fix register name in AllocateAsciiConsString.

src/arm/macro-assembler-arm.cc

 // Copyright 2012 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 1921 matching lines @@
                                              Register length,
                                              Register scratch1,
                                              Register scratch2,
                                              Label* gc_required) {
   Label allocate_new_space, install_map;
   AllocationFlags flags = TAG_OBJECT;
 
   ExternalReference high_promotion_mode = ExternalReference::
       new_space_high_promotion_mode_active_address(isolate());
   mov(scratch1, Operand(high_promotion_mode));
-  ldr(scratch1, MemOperand(r4, 0));
+  ldr(scratch1, MemOperand(scratch1, 0));
   cmp(scratch1, Operand::Zero());
   b(eq, &allocate_new_space);
 
   Allocate(ConsString::kSize,
            result,
            scratch1,
            scratch2,
            gc_required,
            static_cast<AllocationFlags>(flags | PRETENURE_OLD_POINTER_SPACE));
 
@@ skipping 1905 matching lines @@
 void CodePatcher::EmitCondition(Condition cond) {
   Instr instr = Assembler::instr_at(masm_.pc_);
   instr = (instr & ~kCondMask) | cond;
   masm_.emit(instr);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM