[Bug rtl-optimization/48773] Dataflow and REG_DEAD notes

[mfortune at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48773

--- Comment #6 from Matthew Fortune <mfortune at gmail dot com> 2011-05-04 16:19:32 UTC ---
(In reply to comment #5)
> This is a known issue introduced by the DF merge.  I think that the current
> state of affairs is that the passes consuming REG_DEAD/REG_UNUSED notes have to
> invoke df_note_add_problem on entry.

Can anyone speculate as to which passes consume REG_DEAD notes or is it a case
of trawling the source? invoking df_note_add_problem in the final pass should
resolve the bug I have seen but I expect there are more.