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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/112445] [14 Regression] ICE: in lra_split_hard_reg_for,
 at lra-assigns.cc:1861 unable to find a register to spill: {*umulditi3_1}
 with -O -march=cascadelake -fwrapv since r14-4968-g89e5d902fc55ad
Date: Wed, 22 Nov 2023 20:34:06 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D112445

--- Comment #6 from Uro=C5=A1 Bizjak <ubizjak at gmail dot com> ---
(In reply to Jakub Jelinek from comment #4)
> I think this goes wrong during combine.
Combine does not / should not combine moves from hard registers just becaus=
e of
extending register live range. It looks that this should also include
zero-extracts and other "pseudo-move" instructions.

The relevant patch and discussion is at [1].

[1] https://gcc.gnu.org/legacy-ml/gcc-patches/2018-10/msg01356.html=