Your Jan 8th, 2001 rtlanal.c:note_stores change

[Richard Kenner]

    It sounds like you know of a current note_stores() callback that is
    going to fail if they are given as SETs.  

More specifically, I *knew* of.

    Where will these problems be caused?  In particular, who inside a
    note_stores() callback interprets sets of CALL returns in this weird
    way? 

I wish I remembered.  My recollection, though, is that it had to do with
the modes: either something got confused about two things of different modes
being assigned the same value or the fact that it was a non-const VOIDmode
value bothered somebody.

    Is this some ADA specific issue?

No.  The test case was certainly in Ada, but I think it was just that
Ada programs are more likely to return structures than C.