https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110083
Roger Sayle <roger at nextmovesoftware dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |roger at
nextmovesoftware dot com
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2023-06-02
Ever confirmed|0 |1
--- Comment #1 from Roger Sayle <roger at nextmovesoftware dot com> ---
The latent issue exposed by my change is that REG_EQUAL notes on comparisons
are not (correctly) being updated during the STV pass. The temporary work
around is -mno-stv, but I'm working on a patch so that the TImode
const_wide_int in the REG_EQUAL note is converted into a suitable CONST_VECTOR.
The silver lining is that using CCZmode for ptest is finding more optimization
opportunities than before, so that's a good thing.
