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Re: Thoughts about semantics of BB_VISITED

because get_loop_body is often used on places where (lots of) new blocks
get created (like unroller).  Resizing the sbitmap would be quite
annoying.

Also, it's quite annoying to have to keep resetting these flags. I don't think a simple read-only helper should be altering the basic block flags.
All i did was ask for the loop body.

--Dan

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