https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115282
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Priority|P3 |P1
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot
gnu.org
Target|powerpc64-linux-gnu |powerpc64*-linux-gnu
Status|NEW |ASSIGNED
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ah, this is probably a case where we need to split because CSE causes us to
associate operations differently so SLP build for the whole thing fails.
The three-vector permute issue will go away when I manage to finish the load
part of the full SLP enablement.
It also fails on LE. It's the
node 0x39913f0 (max_nunits=4, refcnt=2) vector(4) unsigned int
op template: _14 = in[_13];
stmt 0 _14 = in[_13];
load permutation { 6 }
note. We split the 8-group into 6 and two times 1 element. This needs
an intermediate (interleaving) permute and indeed the load part will fix it.
I suggest to leave this failing until then. The loop is still vectorized
but using non-SLP full interleaving until then.
