[Bug target/101456] Unnecessary vzeroupper when upper bits of YMM registers already zero

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101456

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |12.0
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |FIXED

--- Comment #7 from H.J. Lu <hjl.tools at gmail dot com> ---
Fixed for GCC 12.  Please reopen it if there are other cases where
vzeroupper should be skipped.