------- Comment #4 from pinskia at gcc dot gnu dot org 2009-01-21 03:00 -------
(In reply to comment #2)
That is because the early complete unrolling comes and unrolls the loop so the
autovectorizer does not have a loop to work on anymore. If I increase it to be
16 instead of 4, the loop is vectorizer.
So the original testcase is invalid as two things: aliasing and alignment.
Aliasing because out could overlap with in1/in2, restrict fixes that. And then
the alignment comes into play because there is no way to say the incoming
arguments are 16 byte aligned.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |INVALID
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38899
