https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115484
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|AVX vectorization is |if-to-switch prevents AVX
|limited to 3 comparisons |vectorization
Ever confirmed|0 |1
Last reconfirmed| |2024-06-14
Blocks| |53947
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Target| |x86_64-*-*
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
The issue seems to be that if-to-switch creates a switch () once you get to
four
conditions and switch statements are not handled by the pre-vectorizer
if-conversion (or by vectorization natively).
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations
