[Bug target/84200] [8/9 Regression] r256888 causes 30% performance regression of 519.lbm_r at -Ofast generic tuning on Zen/9

marxin at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Thu Apr 11 08:51:00 GMT 2019


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84200

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |WONTFIX

--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
I can't confirm that on a Ryzen 5 machine, it's actually faster on trunk:
https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=154.477.0&plot.1=65.477.0&plot.2=82.477.0&plot.3=35.477.0&

Out of all configurations, the benchmark is actually faster on trunk than on
GCC-8. Thus I'm closing that.


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