[Bug target/38899] pessimizes function without SSE intrinsics

["pinskia at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>]

------- 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

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