https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57634
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2015-04-29
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
The reduction operation is way too complex (and not handled). It's
s = (unsigned int) (((unsigned long long)s * b[i] + 4194304) >> 23)
it's not clear that you can even vectorize this (independently handle
four 's') because of the truncation. For the case with s being
unsigned long long the point about the not handled reduction operation
is still true.
Thus confirmed in part (redL).
