https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103076
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|slp vectorizer failed to |slp vectorizer failed to
|try smaller lenth. |try smaller size for
| |generic vectors with
| |word_mode
Ever confirmed|0 |1
Status|UNCONFIRMED |NEW
Last reconfirmed| |2021-11-04
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
with -march=z13 unaligned accesses are supported and with -march=z10 we only
seem to try word_mode vectorization which we never "iterate" to try a smaller
integer mode even though in principle we can form vectors with smaller
integer modes.
I suspect this is also reproducible on other strict-alignment platforms
when you disable HW vector support.
