On Aug 18, 2010, at 20:33, Steve Smith wrote:
>
>
> Furthermore, it is incorrect to put a USING statement before it is valid
> (although it is fairly common).  It should be moved after your commented
> line.  The USING for R13 is also obviously premature.
>
What do you do when you're marching through control blocks
using a single base register?  There's inevitably a point
in code between the L and the USING where the prior using
is invalid.  I suppose you could do:

    L  (different register)
    DROP
    LR
    USING

-- gil

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