[Bug rtl-optimization/104049] [12 Regression] vec_select to subreg lowering causes superfluous moves
pinskia at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Mon Jan 17 02:20:39 GMT 2022
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104049
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2022-01-17
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=104039
Target Milestone|--- |12.0
Ever confirmed|0 |1
Keywords| |ra
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This might be the same issue as PR 104039 really, though there we have a
paradoxical subreg.
The problem is the register allocator really really does not handle subreg in a
decent way.
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