https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104018
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2022-01-14
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
The "unfortunate" thing is that FRE1 figures out they are equal but there's
no SSA name available with the value to replace the PHI node with ... it needs
PRE hoisting to apply the CSE which is too late.
It's DOM doing the equivalence propagation btw. (I think DOM is even the only
pass doing this).
