[Bug target/106708] [rs6000] 64bit constant generation with oris xoris

[guojiufu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106708

--- Comment #3 from Jiu Fu Guo <guojiufu at gcc dot gnu.org> ---
With the trunk, for
  *arg++ = 0x98765432ULL;
  *arg++ = 0xffffffff7cdeab55ULL;
are expected.

For *arg++ = 0xffffffff65430000ULL; lis+xoris are not committed to the trunk
yet.