ARM: Track Smis on top 4 stack positions and Smi loop variables....

src/arm/virtual-frame-arm-inl.h

 // 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 30 matching lines @@
   ASSERT(-1 <= index);  // -1 is the receiver.
   ASSERT(index <= parameter_count());
   return MemOperand(fp, (1 + parameter_count() - index) * kPointerSize);
 }
 
   // The receiver frame slot.
 MemOperand VirtualFrame::Receiver() {
   return ParameterAt(-1);
 }
 
+
+void VirtualFrame::Forget(int count) {
+  SpillAll();
+  LowerHeight(count);
+}
+
 } }  // namespace v8::internal
 
 #endif  // V8_VIRTUAL_FRAME_ARM_INL_H_