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[Bug rtl-optimization/48773] Dataflow and REG_DEAD notes
- From: "mfortune at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 4 May 2011 16:25:19 +0000
- Subject: [Bug rtl-optimization/48773] Dataflow and REG_DEAD notes
- Auto-submitted: auto-generated
- References: <bug-48773-4@http.gcc.gnu.org/bugzilla/>
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.