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From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/32648] missed-optimization: bit-manipulation via bool's
Date: Fri, 06 Jul 2007 12:54:00 -0000 [thread overview]
Message-ID: <20070706125402.5257.qmail@sourceware.org> (raw)
In-Reply-To: <bug-32648-8535@http.gcc.gnu.org/bugzilla/>
------- Comment #1 from rguenth at gcc dot gnu dot org 2007-07-06 12:54 -------
Confirmed. This needs VRP of bits. The IL we generate is currently
bool b3;
bool b5;
int D.2483;
int D.2482;
int D.2481;
<bb 2>:
D.2481_2 = a_1(D) & 32;
b5_3 = D.2481_2 != 0;
D.2482_4 = a_1(D) & 8;
b3_5 = D.2482_4 != 0;
D.2483_6 = b5_3 != b3_5;
return D.2483_6;
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Component|c++ |tree-optimization
Ever Confirmed|0 |1
Keywords| |missed-optimization
Last reconfirmed|0000-00-00 00:00:00 |2007-07-06 12:54:02
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32648
next prev parent reply other threads:[~2007-07-06 12:54 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-06 12:25 [Bug c++/32648] New: " wouter dot vermaelen at scarlet dot be
2007-07-06 12:54 ` rguenth at gcc dot gnu dot org [this message]
2007-07-07 3:10 ` [Bug tree-optimization/32648] " rob1weld at aol dot com
[not found] <bug-32648-4@http.gcc.gnu.org/bugzilla/>
2012-02-27 3:39 ` pinskia at gcc dot gnu.org
2023-06-10 1:56 ` pinskia at gcc dot gnu.org
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