[Bug tree-optimization/97081] [8/9/10/11 Regression] wrong code for rotate vectorization (x86 target)

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97081

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|                            |10.1.0, 8.4.0, 9.3.0
           Priority|P3                          |P2
      Known to work|                            |7.5.0, 8.3.0, 9.2.0
   Target Milestone|---                         |8.5
            Summary|wrong code for rotate       |[8/9/10/11 Regression]
                   |vectorization (x86 target)  |wrong code for rotate
                   |                            |vectorization (x86 target)

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Interestingly GCC 7 created the correct

 patt_18 = patt_19 & 63;

but something broke it during GCC 10 development and was even backported.