[Bug target/63892] [5 Regression] gcc.dg/sibcall-3.c fails on darwin with -m32

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63892

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 34818
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34818&action=edit
V499

And let's copy and adjust the sibcall-{3,4}.c testcases so that they aren't ICF
optimized, so that we also test what we originally meant to.