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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/93974] [10 Regression] ICE in
 decompose_normal_address, at rtlanal.c:6403 on powerpc64le-linux-gnu since
 r10-6762
Date: Wed, 15 Apr 2020 23:24:54 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D93974

--- 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).=