[Bug tree-optimization/116765] [12/13/14/15 regression] gcc generate wrong code with -O3 -march=skylake

[sjames at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116765

Sam James <sjames at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|gcc generate wrong code     |[12/13/14/15 regression]
                   |with -O3 -march=skylake     |gcc generate wrong code
                   |                            |with -O3 -march=skylake
      Known to work|                            |4.9.0

--- Comment #2 from Sam James <sjames at gcc dot gnu.org> ---
4.9.1 seems to be the first bad version on godbolt w/ -O3 -fno-vect-cost-model
-ftree-vectorize -mavx