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From: "rsandifo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/94398] ICE: in vectorizable_load, at
 tree-vect-stmts.c:9173
Date: Mon, 30 Mar 2020 09:55:18 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94398

--- Comment #3 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.or=
g> ---
(In reply to Richard Biener from comment #2)
> But the ICE happens because the result from the function at transform time
> does not match that at analysis time.
>=20
> Richard?

Looks like we're trying to compute:

  alignment_support_scheme
    =3D vect_supportable_dr_alignment (first_dr_info, false);
  gcc_assert (alignment_support_scheme);

even for VMAT_GATHER_SCATTER, which always accesses individual
elements.  Guess we should set alignment_support_scheme to
dr_unaligned_supported instead of calling
vect_supportable_dr_alignment.

The target hook is probably incorrect for SVE + -mstrict-align.=