[Bug target/88343] [7/8 Regression] R31 is unconditionally saved/restored on powerpc-darwin even when it's not necessary.

[jsm28 at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88343

--- Comment #18 from Joseph S. Myers <jsm28 at gcc dot gnu.org> ---
Created attachment 45329
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45329&action=edit
Good assembly (with the GCC patch reverted)