https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67323
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2015-08-25
CC|richard.guenther at gmail dot com |rguenth at gcc dot
gnu.org
Depends on| |66721
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot
gnu.org
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. We go down the SLP path here because the vectorizer thinks that
SLP is always cheaper than using interleaving (which generally is true
if there were not targets which can do the load plus interleave with
load-lanes ...).
I think this may be a regression as well because I enhanced SLP to apply
to way more cases.
Note that my plan is to make the vectorizer consider both (well, not really,
but this bug shows I maybe should try), SLP and non-SLP, and evaluate based
on costs which route to go.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66721
[Bug 66721] [6 regression] gcc.target/i386/pr61403.c FAILs
