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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 [thread overview]
Message-ID: <bug-112445-4-g6nRZGFSdy@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-112445-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112445
--- Comment #6 from Uroš 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 because 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
next prev parent reply other threads:[~2023-11-22 20:34 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-08 16:06 [Bug target/112445] New: [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 zsojka at seznam dot cz
2023-11-09 3:06 ` [Bug target/112445] " pinskia at gcc dot gnu.org
2023-11-09 3:16 ` pinskia at gcc dot gnu.org
2023-11-09 5:59 ` zsojka at seznam dot cz
2023-11-15 10:13 ` [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 sjames at gcc dot gnu.org
2023-11-22 19:25 ` jakub at gcc dot gnu.org
2023-11-22 20:03 ` jakub at gcc dot gnu.org
2023-11-22 20:34 ` ubizjak at gmail dot com [this message]
2023-11-22 20:46 ` vmakarov at gcc dot gnu.org
2023-12-01 16:54 ` cvs-commit at gcc dot gnu.org
2023-12-06 16:50 ` jakub at gcc dot gnu.org
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