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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/105394] [12/13 Regression] ICE: verify_gimple failed
 with MVE during GIMPLE pass: veclower2
Date: Fri, 29 Apr 2022 09:20:05 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105394

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #5)
> I think the fix should rather be to the
>=20
>       else=20
>         aa =3D tree_vec_extract (gsi, cond_type, a, width, index);
>=20
> part which assumes that if a is not a comparison or a integer mode mask t=
hen
> the mask vector element width is the same as the data element width which
> isn't the case for VnBImode vectors (neither on MVE which can have multi-=
bit
> bitsize BImode elements nor on SVE/GCN which I think have one-bit bitsize
> BImode elements only).

And a proper refactoring of things would turn the tree_vec_extract
bitsize/bitpos arguments to poly_uint64 so we can do arithmetic in
non-trees in the caller(s) (maybe add an overload for simplicity).=