[Bug target/108958] Powerpcle could generate mtvsrdd for zero extend DI to TI mode, when the TImode is in a vector register

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108958

--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(A good patch is like: we currently generate X (because of Y Z A), but we could
do B C D instead, and generate E).