https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114027
Robin Dapp <rdapp at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org
Last reconfirmed| |2024-2-22
Target|riscv |x86_64-*-* riscv*-*-*
| |aarch64-*-*
--- Comment #5 from Robin Dapp <rdapp at gcc dot gnu.org> ---
To me it looks like we interpret e.g. c_53 = _43 ? prephitmp_13 : 0 as the only
reduction statement and simplify to MAX because of the wrong assumption that
this is the only reduction statement in the chain when we actually have
several.
(See "condition expression based on compile time constant").
--- Comment #6 from Robin Dapp <rdapp at gcc dot gnu.org> ---
Btw this fails on x86 and aarch64 for me with -fno-vect-cost-model. So it
definitely looks generic.
