ARM: Make the ARM hardware builder green...

src/arm/code-stubs-arm.cc

 // Copyright 2011 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 3142 matching lines @@
   __ mov(r0, Operand(r4));
   __ mov(r1, Operand(r6));
 
 #if defined(V8_HOST_ARCH_ARM)
   int frame_alignment = MacroAssembler::ActivationFrameAlignment();
   int frame_alignment_mask = frame_alignment - 1;
   if (FLAG_debug_code) {
     if (frame_alignment > kPointerSize) {
       Label alignment_as_expected;
       ASSERT(IsPowerOf2(frame_alignment));
-      __ tst(r2, Operand(frame_alignment_mask));
+      __ tst(sp, Operand(frame_alignment_mask));
       __ b(eq, &alignment_as_expected);
       // Don't use Check here, as it will call Runtime_Abort re-entering here.
       __ stop("Unexpected alignment");
       __ bind(&alignment_as_expected);
     }
   }
 #endif
 
   // TODO(1242173): To let the GC traverse the return address of the exit
   // frames, we need to know where the return address is. Right now,
@@ skipping 2482 matching lines @@
   __ pop(r1);
   __ Jump(r2);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM