From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 30645 invoked by alias); 2 Oct 2002 14:56:01 -0000 Mailing-List: contact gcc-prs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-prs-owner@gcc.gnu.org Received: (qmail 30625 invoked by uid 71); 2 Oct 2002 14:56:01 -0000 Date: Wed, 02 Oct 2002 07:56:00 -0000 Message-ID: <20021002145601.30624.qmail@sources.redhat.com> To: nobody@gcc.gnu.org Cc: gcc-prs@gcc.gnu.org, From: "Kaveh R. Ghazi" Subject: Re: target/8087: sparc-sun-solaris2.7 C testsuite failures in execute/20020720-1.c w/-m64 or on sparcv9/sparc64 Reply-To: "Kaveh R. Ghazi" X-SW-Source: 2002-10/txt/msg00054.txt.bz2 List-Id: The following reply was made to PR target/8087; it has been noted by GNATS. From: "Kaveh R. Ghazi" To: roger@eyesopen.com, rth@redhat.com Cc: davem@redhat.com, gcc-bugs@gcc.gnu.org, gcc-gnats@gcc.gnu.org, gcc-prs@gcc.gnu.org, jakub@redhat.com Subject: Re: target/8087: sparc-sun-solaris2.7 C testsuite failures in execute/20020720-1.c w/-m64 or on sparcv9/sparc64 Date: Wed, 2 Oct 2002 10:46:13 -0400 (EDT) > From: Roger Sayle > > > One is sort of meaningless all on its own. You have to know what > > sort of comparison is going to be used with it.o > > Hum, actually that's true with NaN and UNORDERED as well. > > I.e. this is all bogus for COMPARE targets. > > My apologies to that sparc64 maintainers. The HP-UX solution is > indeed inapplicable for COMPARE targets. > > I also now realize my mistake trying to analyze this problem. I was > running "cc1" with "-m64 -O2" whilst debuging in gdb, as these were > the same flags I used to run gcc. The problem is that gcc also > passes "-mcpu=v9" to cc1, and this flag is required to exhibit > the problem. It turns out that its the sparc64's constant pool > handling that hides the optimization, rather than the optimization > triggering and not being representable in the machine description. So what does that mean with respect to addressing the testcase? Fixable? XFAIL it? --Kaveh -- Kaveh R. Ghazi ghazi@caip.rutgers.edu