[Bug rtl-optimization/114960] [12/13/14/15 Regression] fails to clean up vector casts

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114960

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|target                      |rtl-optimization
           Keywords|                            |missed-optimization, ra

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The difference between GCC 11 and 12 is just:
(subreg:V16QI (reg:V2DI 84 [ <retval> ]) 0)

vs
(reg:V16QI 88)

For the lhs of the plus.

This is a RA issue. There are a few bugs about subreg and RA somewhere ...