[Bug rtl-optimization/93974] [10 Regression] ICE in decompose_normal_address, at rtlanal.c:6403 on powerpc64le-linux-gnu since r10-6762

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93974

--- Comment #23 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(cannot_substitute_mem_equiv_p,
 "A target hook which returns @code{true} if @var{subst} can't\n\
substitute safely pseudos with equivalent memory values during\n\
register allocation.\n\

I guess "ICEs the compiler" falls under "not safely" ;-)

Since AltiVec addresses are "legacy", this is a fine change (well
I haven't seen the actual patch yet, heh).