[Bug target/92566] rs6000_preferred_simd_mode isn't very good

[linkw at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92566

Kewen Lin <linkw at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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  Attachment #47306|0                           |1
        is obsolete|                            |

--- Comment #7 from Kewen Lin <linkw at gcc dot gnu.org> ---
Created attachment 47325
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47325&action=edit
Simplify with VECTOR_UNIT_NONE_P and mode_for_vector

Updated as mode_for_vector.