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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/103439] genemit emits dead code
Date: Fri, 26 Nov 2021 12:28:30 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103439

--- Comment #2 from rguenther at suse dot de <rguenther at suse dot de> ---
On Fri, 26 Nov 2021, ubizjak at gmail dot com wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103439
>=20
> --- Comment #1 from Uro=C5=A1 Bizjak <ubizjak at gmail dot com> ---
> (In reply to Richard Biener from comment #0)
> > I'm not sure if there are valid cases where we have a mix of a direct
> > RTL pattern and manual expansion, so where the { } part falls thru.
>=20
> Yes, we have quite some of them in e.g. i386.md, movstrict<mode>, extv<mo=
de>,
> extzv<mode>, insv<mode> and zero_extend expanders are some of them.

OK, so that's conditional FAILs.  I've not yet found a conditional
DONE that eventually falls through to a "DONE via the pattern".=