From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 26444 invoked by alias); 28 Jul 2010 23:32:04 -0000 Received: (qmail 26400 invoked by uid 48); 28 Jul 2010 23:31:52 -0000 Date: Wed, 28 Jul 2010 23:32:00 -0000 Message-ID: <20100728233152.26399.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug tree-optimization/45034] [4.3/4.4/4.5/4.6 Regression] "safe" conversion from unsigned to signed char gives broken code In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "mikpe at it dot uu dot se" 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: 2010-07/txt/msg03152.txt.bz2 ------- Comment #15 from mikpe at it dot uu dot se 2010-07-28 23:31 ------- Richard's proposed fix appears to need the PR44284 fix to avoid regressing vect-20.c, much like PR44828 also needed PR44284 to not regress vectorization tests. Current 4.5 has PR44284 backported, so the PR45034 fix works there. I did a preliminary backport of the first PR44284 fix to 4.4, and that solved the vect-20.c regression but caused a couple of regressions of its own. I'll try backporting the followup fixes too, but I suspect the rational conclusion will be to not backport the PR45034 fix, or to backport it with an adjustment to vect-20.c to expect the reduced vectorization. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45034