From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 26830 invoked by alias); 19 Feb 2007 00:54:51 -0000 Received: (qmail 26794 invoked by alias); 19 Feb 2007 00:54:39 -0000 Date: Mon, 19 Feb 2007 00:54:00 -0000 Message-ID: <20070219005439.26793.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug rtl-optimization/28173] [4.0/4.1 regression] misses constant folding In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "sayle at gcc dot gnu dot org" Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2007-02/txt/msg02156.txt.bz2 ------- Comment #5 from sayle at gcc dot gnu dot org 2007-02-19 00:54 ------- Subject: Bug 28173 Author: sayle Date: Mon Feb 19 00:54:29 2007 New Revision: 122116 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=122116 Log: PR rtl-optimization/28173 * simplify-rtx.c (simplify_binary_operation_1) : Optimize (X & C1) | C2 as C2 when (C1 & C2) == C1 and X has no side-effects. Optimize (X & C1) | C2 as X | C2 when (C1 | C2) == ~0. Canonicalize (X & C1) | C2 as (X & (C1 & ~C2)) | C2. : Canonicalize (X | C1) & C2 as (X & C2) | (C1 & C2). * gcc.target/i386/andor-1.c: New test case. Added: trunk/gcc/testsuite/gcc.target/i386/andor-1.c Modified: trunk/gcc/ChangeLog trunk/gcc/simplify-rtx.c trunk/gcc/testsuite/ChangeLog -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28173