From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
	id 036B43858025; Wed, 11 Jan 2023 12:14:02 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 036B43858025
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1673439243;
	bh=ocnX6trtUUPHF7ZqYms6m/zUu5TpL7qxtrr1wMCwhc0=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=rFYg9Busg5Z2LPNESdWtaXHX7CxWicnrBtIGCSq61FcRN/RFCPuHPwkcIi3rjv5KA
	 jOi6UZtOl7pKrsWE9saWlNL1K9NjdmuRQ13ZRXyWHXdlG1s0e+KnDHGcDki72gEsuJ
	 I9vonHZpLUfnzQndNeH4MNbxgLhi+YMWNpRKNAzg=
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/107767] [13 Regression] switch to table
 conversion happening even though using btq is better
Date: Wed, 11 Jan 2023 12:14:00 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 13.0
X-Bugzilla-Keywords: missed-optimization
X-Bugzilla-Severity: normal
X-Bugzilla-Who: cvs-commit at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P1
X-Bugzilla-Assigned-To: rguenth at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 13.0
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-107767-4-p5oXUNfFND@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-107767-4@http.gcc.gnu.org/bugzilla/>
References: <bug-107767-4@http.gcc.gnu.org/bugzilla/>
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: <gcc-bugs.sourceware.org>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107767

--- Comment #19 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Biener <rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:f99d7d669eaa2830eb5878df4da67e77ec791522

commit r13-5106-gf99d7d669eaa2830eb5878df4da67e77ec791522
Author: Richard Biener <rguenther@suse.de>
Date:   Mon Jan 9 09:42:22 2023 +0100

    tree-optimization/107767 - not profitable switch conversion

    When the CFG has not merged equal PHI defs in a switch stmt the
    cost model from switch conversion gets off and we prefer a
    jump table over branches.  The following fixes that by recording
    cases that will be merged later and more appropriately counting
    unique values.

            PR tree-optimization/107767
            * tree-cfgcleanup.cc (phi_alternatives_equal): Export.
            * tree-cfgcleanup.h (phi_alternatives_equal): Declare.
            * tree-switch-conversion.cc (switch_conversion::collect):
            Count unique non-default targets accounting for later
            merging opportunities.

            * gcc.dg/tree-ssa/pr107767.c: New testcase.=