https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104982
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-* i?86-*-*
Ever confirmed|0 |1
Last reconfirmed| |2022-03-21
Status|UNCONFIRMED |NEW
Keywords| |missed-optimization
Target Milestone|--- |12.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. From my analysis at the point I pushed the offending revision the
edges out of a conditional are now swapped, EDGE_SUCC (bb, 1) vs. EDGE_SUCC
(bb, 0), and that somehow leads to magic no longer happening.
That's of course a condition (the particular edge order) that we can't rely
on. If there's a "better" one for expanding RTL we should conciously choose
it there.
