------- Comment #4 from ubizjak at gmail dot com 2007-06-27 11:24 -------
(In reply to comment #3)
> The problem is in -ftree-vectorize
The difference is, that without -ftree-vectorize the inner loop (do k = 1, 9)
is completely unrolled, but with vectorization, the loop is vectorized, but
_not_ unrolled. Since the vectorization factor is only 2 for V2DF mode vectors,
we loose big time at this point.
My best guess for unroller problems would be rtl-optimization.
--
ubizjak at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC|dorit at gcc dot gnu dot org|
Component|tree-optimization |rtl-optimization
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32084
