https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119103
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Blocks| |53947
Target| |x86_64-*-*
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Hongtao Liu from comment #5)
> (In reply to Hongtao Liu from comment #4)
> > vect_recog_over_widening_pattern could be extended with range info for this?
>
> Looks like vectorizer already have range_info from
> vect_determine_precisions_from_range
vect_recog_over_widening_pattern is where the demotion should happen, not sure
why it doesn't.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations
