https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102138
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Last reconfirmed| |2021-08-31
Status|UNCONFIRMED |NEW
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. I attached some propagation through PHI folding for forwprop (WIP)
to the spaceship PR. There's also tree-ssa-phiprop.c which does sth like
PHI-translation for loads that could be generalized.
In general it opens the same issues as PRE - possibly extra copies due to the
constants in PHIs and possibly less optimized code because readily available
constants (in registers) are explicitely represented and need to be
re-materialized.
