[Bug target/71805] incorrect code for test pr45752.c with -mcpu=power9

[meissner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71805

--- Comment #3 from Michael Meissner <meissner at gcc dot gnu.org> ---
Created attachment 38878
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38878&action=edit
Proposed patch to fix the problem