[Bug target/95125] Unoptimal code for vectorized conversions

rguenth at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Thu May 14 11:55:34 GMT 2020


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95125

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|unknown                     |11.0
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2020-05-14
             Target|                            |x86_64-*-* i?86-*-*
           Keywords|                            |missed-optimization
             Status|UNCONFIRMED                 |NEW

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
ISTR I filed a duplicate 10 years ago or so.  The issue is the vectorizer
could not handle V4DFmode -> V4SFmode conversions.

Could, because for SVE we added the capability but this requires
additional instruction patterns (IIRC I filed a but about this last
year).  Yep.  PR92658 it is.


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