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 2D0463858D39; Tue,  2 May 2023 04:06:49 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 2D0463858D39
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1683000409;
	bh=cXF5AIq2d4EaJHkyTfuViF/WkR5Xq2r4jUhZ5H4VPtc=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=TRx1q62FmmYIMpbtUlkJOQJlDW6i8OHMlet+A4l4GQ16OVc4zRalHOPTvgrRQRLr1
	 Jg9DeujCkcUySyqBmh+vSNCRuAYbgbhVOg6UvuX0CA2io8NR+ViWr5jqDhS2y0Nb2z
	 NikQJYPLJTUH6uz5XlNhJSG+wZNiHGNa62j4z0oU=
From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/101226] Suboptimal codegen for >>/>>>
Date: Tue, 02 May 2023 04:06:48 +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: 11.1.0
X-Bugzilla-Keywords: missed-optimization
X-Bugzilla-Severity: enhancement
X-Bugzilla-Who: pinskia at gcc dot gnu.org
X-Bugzilla-Status: NEW
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: assigned_to
Message-ID: <bug-101226-4-swm9ocBPqZ@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-101226-4@http.gcc.gnu.org/bugzilla/>
References: <bug-101226-4@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=3D101226

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at gcc dot gnu.org      |pinskia at gcc dot =
gnu.org

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Here is a C/C++ example:
typedef unsigned char ubyte;
void f1()
{
    extern ubyte value;
    unsigned int t =3D value;
    t >>=3D 5;
    value =3D t;
}

void f2()
{
    extern ubyte value;
    value =3D value >> 5;
}=