https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103270
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hubicka at gcc dot gnu.org
Last reconfirmed| |2021-11-16
Target Milestone|--- |12.0
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
So you say this is a problem with loop header copying, that would mean the
issue is really latent and general, no? Header copying uses
gimple_duplicate_sese_region and has no own profile updating. I guess its
profile updating code isn't designed to cope with copying a region with
"side"-entries (we are ignoring the backedge here). Not sure if we can
somehow generally handle those (maybe we can learn from tracer or threader
here).
Honza?
