[Bug tree-optimization/51890] vectorizer does not recognize intrinsic functions like sqrt

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51890

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID

--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-01-18 
10:06:07 UTC ---
You need to enable -fno-math-errno as sqrt may set errno which we cannot
vectorize.  Then the loop is vectorized (-ffast-math conveniently also
enables -fno-math-errno).