[Bug target/103124] PPC: "mr" instruction is unnecessary when extending DI to V1TI

[guihaoc at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103124

--- Comment #1 from HaoChen Gui <guihaoc at gcc dot gnu.org> ---
Build command gcc -O2 -S test.c -mcpu=power9