[Bug target/84413] [8/9 Regression] -mtune=skylake,skylake-avx512,cannonlake,icelake disable many optimizations

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84413

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2018-07-12
            Summary|-mtune=skylake,skylake-avx5 |[8/9 Regression]
                   |12,cannonlake,icelake       |-mtune=skylake,skylake-avx5
                   |disable many optimizations  |12,cannonlake,icelake
                   |                            |disable many optimizations
     Ever confirmed|0                           |1