[Bug target/90323] powerpc should convert equivalent sequences to vec_sel()

[slandden at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90323

--- Comment #2 from Shawn Landden <slandden at gmail dot com> ---
Created attachment 46305
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46305&action=edit
test case.

These two functions should produce identical code.