[Bug rtl-optimization/88846] [9 Regression] pr69776-2.c failure on 32 bit AIX

[dje at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88846

--- Comment #4 from David Edelsohn <dje at gcc dot gnu.org> ---
PPC64 Linux Altivec and VSX by default while AIX does not.  PPC64 Linux loads
0.0 into FPR using VSX xxlor instruction while AIX loads via constant in
memory. This causes the different REG_EQUIV alias set.