[Bug target/93768] Use vpternlog for composite logical operations

[ak at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93768

ak at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ak at gcc dot gnu.org
         Resolution|---                         |DUPLICATE
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #2 from ak at gcc dot gnu.org ---
Most of it is already done as part of PR101989

One issue is that it is only for suitable vector types, it doesn't really work
for scalars because the compiler has no idea that a conversion might be
profitable. Perhaps that would be an interesting (but likely) separate feature
to define some frame work to figure out if switching to the vector ISA is worth
it.

*** This bug has been marked as a duplicate of bug 101989 ***