From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id C4391385840E; Fri, 22 Mar 2024 12:17:57 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org C4391385840E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1711109877; bh=im/NJ3AudAdAMR0Z4lZniBLWHo2Usot7ET2MY87fYbk=; h=From:To:Subject:Date:In-Reply-To:References:From; b=YUxNlQiLolRTNUY/+lcG90GXu2cpMaVqEXFAlCgwn7/CBYFwBA332yLWt2/FRJh9a S9rSoyNQ7eVOdgHqRgmMn71tP5p63JO9mSvb94Ra0/kYkm2BBsCAYTTDEq0uArp8wh bIE1b+31ytsR2HlRNLwuFCfkqspiZSTx87hu79kI= From: "rguenth at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/101523] Huge number of combine attempts Date: Fri, 22 Mar 2024 12:17:54 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: target X-Bugzilla-Version: 12.0 X-Bugzilla-Keywords: compile-time-hog, memory-hog X-Bugzilla-Severity: normal X-Bugzilla-Who: rguenth at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: segher at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101523 --- Comment #47 from Richard Biener --- The rtx_equal_p change gets us 50% improvement only, it's necessary to also disable the added_{links,notes}_insn extra re-processing to get us all the way to -O1 speed. We'd need the worklist to avoid combine regressions there (though for the actual testcase it doesn't make a difference).=