First step towards making JumpTarget work on ARM. Instead...

src/register-allocator.cc

 // Copyright 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 66 matching lines @@
       ASSERT(!is_used(free_reg));
       return Result(free_reg);
     }
   }
   return result;
 }
 
 
 Result RegisterAllocator::Allocate(Register target) {
   // If the target is not referenced, it can simply be allocated.
-  if (!is_used(target)) {
+  if (!is_used(RegisterAllocator::ToNumber(target))) {
     return Result(target);
   }
   // If the target is only referenced in the frame, it can be spilled and
   // then allocated.
   ASSERT(cgen_->has_valid_frame());
-  if (cgen_->frame()->is_used(target) && count(target) == 1)  {
+  if (cgen_->frame()->is_used(RegisterAllocator::ToNumber(target)) && count(target) == 1)  {
     cgen_->frame()->Spill(target);
-    ASSERT(!is_used(target));
+    ASSERT(!is_used(RegisterAllocator::ToNumber(target)));
     return Result(target);
   }
   // Otherwise (if it's referenced outside the frame) we cannot allocate it.
   return Result();
 }
 
 
 } }  // namespace v8::internal