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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/113988] during GIMPLE pass: bitintlower: internal
 compiler error: in lower_stmt, at gimple-lower-bitint.cc:5470
Date: Mon, 19 Feb 2024 14:39:28 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113988

--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #8)
> (In reply to Jakub Jelinek from comment #7)
> > I think I can handle it like the VIEW_CONVERT_EXPR case, bet with
> > _BitInt(511) it would actually be a VCE, but when it is same size
> > BITINT_TYPE to INTEGER_TYPE we choose NOP_EXPR.
> > That said, I think it would be better if the memcpy folding used say ve=
ctor
> > types instead of these extra large integer types.
>=20
> Hmm.  Maybe we want a target hook to specify the "move mode" for a given
> byte size and then we can use bitwise_type_for_mode to get a type?
>=20
> Maybe we can even get rid of that large integer mode requirement that way=
 ...

Or we refuse to use integer types for > MAX_FIXED_MODE_SIZE sizes and
instead always try VNQImode?  For memcpy folding I mean.=