public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
From: "vmakarov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/113354] Regression/14: unable to find a register to spill on mips Date: Fri, 12 Jan 2024 18:34:32 +0000 [thread overview] Message-ID: <bug-113354-4-ocxnTJxI6s@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-113354-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113354 Vladimir Makarov <vmakarov at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |vmakarov at gcc dot gnu.org --- Comment #2 from Vladimir Makarov <vmakarov at gcc dot gnu.org> --- Thank you for reporting this. The issue is not in the patch itself. The patch simply triggered a hidden bug. The insn in the question looks like 1657: {r3001:SI=r291:SI*r294:SI+r3002:SI;clobber r2788:SI;clobber r2390:SI;} On the 1st subpass we choose alternative with the following constraints (0) l (1) d (2) d (3) l (4) X (5) X {*mul_acc_si} On the second subpass we choose alternative (0) l (1) d (2) d (3) l (4) X (5) X {*mul_acc_si} p2788 happened to get MD0 and it prevents p3001 to get MD0 too. p2788 can be in any location for this alternative but LRA assignment subpass does not take this into account. I'll try to fix this hidden bug on the beginning of the next week.
next prev parent reply other threads:[~2024-01-12 18:34 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-01-12 12:28 [Bug middle-end/113354] New: " syq at gcc dot gnu.org 2024-01-12 14:02 ` [Bug middle-end/113354] " syq at gcc dot gnu.org 2024-01-12 18:34 ` vmakarov at gcc dot gnu.org [this message] 2024-01-13 0:46 ` [Bug middle-end/113354] [14 Regression] : " pinskia at gcc dot gnu.org 2024-01-15 15:26 ` cvs-commit at gcc dot gnu.org 2024-01-17 9:44 ` syq at gcc dot gnu.org
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=bug-113354-4-ocxnTJxI6s@http.gcc.gnu.org/bugzilla/ \ --to=gcc-bugzilla@gcc.gnu.org \ --cc=gcc-bugs@gcc.gnu.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).