[Bug tree-optimization/103897] x86: Missing optimizations with _mm_undefined_si128 and PMOVSX*

pinskia at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Mon Jan 3 13:44:13 GMT 2022


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103897

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |missed-optimization
           Severity|normal                      |enhancement

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The zeroing is a known issue which I suspect is going to be resolved during the
next stage 1, there is a few other bugs referencing the reason why we do the
zeroing of registers.


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