pa reload problem

[John David Anglin]

>   In message <200012141640.LAA03285@hiauly1.hia.nrc.ca>you write:
>   > That's what I thought.  It would appear to occur when the above two insns
>   > get moved out of a loop.  The count gets decremented when the old insns
>   > are deleted but not incremented when the new insns are created.  The puzzle
>   > is why the count is zero rather than 1.  Maybe what happens is the two
>   > insns in the loop are deleted first, then the label is deleted?  Notice
>   > that insn 788 is moved to insn 1530.  However, the insn becomes 1531 and
>   > the reg changes to 337 from 208.
> In this case we typically will bump the number of uses before we delete
> the insns that way the label doesn't go away unexpectedly.

As far I can tell, move_movables doesn't do this when it moves an insn
out of a loop.  It does this by deleting the old insn and creating a new
one.  It calls add_label_notes if notes need to be added to the new insn.

I sent a patch to add_label_notes for review which I think fixes the
problem.

Dave
-- 
J. David Anglin                                  dave.anglin@nrc.ca
National Research Council of Canada              (613) 990-0752 (FAX: 952-6605)