[Bug tree-optimization/126415] [17 regression] Wrong code at -O2/3/s on x86_64-pc-linux-gnu since r17-2078

"ptomsich at gcc dot gnu.org via Gcc-bugs" <[email protected]> Mon, 27 Jul 2026 11:23:10 +0000

Newsgroups	gmane.comp.gcc.bugs
Message-ID	<[email protected]/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126415

ptomsich at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at gcc dot gnu.org      |ptomsich at gcc dot gnu.org
             Status|NEW                         |ASSIGNED

--- Comment #3 from ptomsich at gcc dot gnu.org ---
Looking at the dump files: the match.pd is not confined to VN and misfires.
To fix, this has to be coded by hand direly in SCCVN (as in an earlier version
of PR124545).