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 855F93858C50; Tue, 12 Sep 2023 15:02:27 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 855F93858C50
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1694530947;
	bh=BliXFakeYfgbG+VuUOyXX9fhmV2v4xH/HAo+Z9/BlN8=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=Agbm8DWwOjozjv2b+uGMV3JW2IXbL7TzhIEgy/JirFQ9OrDnXzN0erYaKn8lVwsI6
	 faw6rQB/buWFTPY0SAJ2XhyTSI1510Du0lNQ9Uc3L8wIJQSYh0mIdoxm+EyyPZwoBv
	 y6TdpGOSLz+llAWuZBPT5NSA/WN7yCHz6Sj9zeqo=
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/107881] (a <= b) == (b >= a) should be
 optimized to (a == b)
Date: Tue, 12 Sep 2023 15:02:26 +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: enhancement
X-Bugzilla-Who: cvs-commit at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: pinskia at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-107881-4-FrwbauG6Ke@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-107881-4@http.gcc.gnu.org/bugzilla/>
References: <bug-107881-4@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=3D107881

--- Comment #17 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Andrew Pinski <pinskia@gcc.gnu.org>:

https://gcc.gnu.org/g:895e476f64c308dfdbf49693d0b1166c0b7733de

commit r14-3881-g895e476f64c308dfdbf49693d0b1166c0b7733de
Author: Andrew Pinski <apinski@marvell.com>
Date:   Mon Sep 11 15:35:59 2023 -0700

    MATCH: Simplify (a CMP1 b) ^ (a CMP2 b)

    This adds the missing optimizations here.
    Note we don't need to match where CMP1 and CMP2 are complements of each
    other as that is already handled elsewhere.

    I added a new executable testcase to make sure we optimize it correctly
    as I had originally messed up one of the entries for the resulting
    comparison to make sure they were 100% correct.

    OK? Bootstrapped and tested on x86_64-linux-gnu with no regressions.

            PR tree-optimization/107881

    gcc/ChangeLog:

            * match.pd (`(a CMP1 b) ^ (a CMP2 b)`): New pattern.
            (`(a CMP1 b) =3D=3D (a CMP2 b)`): New pattern.

    gcc/testsuite/ChangeLog:

            * gcc.c-torture/execute/pr107881-1.c: New test.
            * gcc.dg/tree-ssa/cmpeq-4.c: New test.
            * gcc.dg/tree-ssa/cmpxor-1.c: New test.=