[Bug testsuite/59494] [4.9 Regression] FAIL: gfortran.dg/vect/fast-math-mgrid-resid.f scan-tree-dump-times optimized "vect_[^\\n]*\\+ " 13

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59494

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
True, I guess adding -mtune=generic doesn't hurt though, it will be still
broken with --target_board=unix/-mtune=core2 or similar testing, but at least
it will FAIL less often.  For core* tuning the difference is e.g. in reassoc
(different reassoc widths, fairly recent change), and starting with probably
r160636 different IVopts decisions based on different costs.  I believe that is
the only reason for the different number of vector additions.