[Bug target/69299] [6 Regression] -mavx performance degradation with r232088

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69299

--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 37364
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37364&action=edit
A patch

Does it make sense?