From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 21706 invoked by alias); 28 Nov 2011 23:45:41 -0000 Received: (qmail 21696 invoked by uid 22791); 28 Nov 2011 23:45:39 -0000 X-SWARE-Spam-Status: No, hits=-2.6 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,TW_BJ,TW_CX,TW_DC,TW_GC,TW_GT,TW_GX X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Mon, 28 Nov 2011 23:45:24 +0000 From: "jurij at wooyd dot org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/51315] gcc 4.6.2 miscompilation with -ftree-sra (included in -O2) on Debian/sparc Date: Tue, 29 Nov 2011 04:54:00 -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-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: jurij at wooyd dot org X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 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: 2011-11/txt/msg02728.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51315 --- Comment #1 from Jurij Smakov 2011-11-28 23:45:19 UTC --- Debian gcc maintainers suggested that I try to build the test case with various gcc versions available in Debian and post the results here. Here's a summary: Debian's gcc-4.4 is not affected: jurij@debian:~/ftree-sra$ gcc-4.4 -v Using built-in specs. Target: sparc-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Debian 4.4.6-11' --with-bugurl=file:///usr/share/doc/gcc-4.4/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.4 --enable-shared --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.4 --libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-objc-gc --enable-targets=all --with-long-double-128 --enable-checking=release --build=sparc-linux-gnu --host=sparc-linux-gnu --target=sparc-linux-gnu Thread model: posix gcc version 4.4.6 (Debian 4.4.6-11) jurij@debian:~/ftree-sra$ jurij@debian:~/ftree-sra$ gcc-4.4 -g -O2 -ftree-sra pack.c -o pack jurij@debian:~/ftree-sra$ ./pack do_something called with item=-32767 do_something called with item=-123456 jurij@debian:~/ftree-sra$ Debian's gcc-4.5 is not affected: jurij@debian:~/ftree-sra$ gcc-4.5 -v Using built-in specs. COLLECT_GCC=gcc-4.5 COLLECT_LTO_WRAPPER=/usr/lib/gcc/sparc-linux-gnu/4.5.3/lto-wrapper Target: sparc-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Debian 4.5.3-9' --with-bugurl=file:///usr/share/doc/gcc-4.5/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.5 --enable-shared --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.5 --libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-plugin --enable-gold --enable-ld=default --with-plugin-ld=ld.gold --enable-objc-gc --enable-targets=all --with-long-double-128 --enable-checking=release --build=sparc-linux-gnu --host=sparc-linux-gnu --target=sparc-linux-gnu Thread model: posix gcc version 4.5.3 (Debian 4.5.3-9) jurij@debian:~/ftree-sra$ jurij@debian:~/ftree-sra$ gcc-4.5 -g -O2 -ftree-sra pack.c -o pack jurij@debian:~/ftree-sra$ ./pack do_something called with item=-32767 do_something called with item=-123456 jurij@debian:~/ftree-sra$ Debian's gcc-snapshot is affected: jurij@debian:~/ftree-sra$ export PATH=/usr/lib/gcc-snapshot/bin:${PATH} jurij@debian:~/ftree-sra$ which gcc /usr/lib/gcc-snapshot/bin/gcc jurij@debian:~/ftree-sra$ gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc-snapshot/libexec/gcc/sparc-linux-gnu/4.7.0/lto-wrapper Target: sparc-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Debian 20111103-1' --with-bugurl=file:///usr/share/doc/gcc-snapshot/README.Bugs --enable-languages=c,ada,c++,java,fortran,objc,obj-c++ --prefix=/usr/lib/gcc-snapshot --enable-shared --enable-linker-build-id --with-system-zlib --disable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-plugin --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.7-snap/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.7-snap --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.7-snap --with-arch-directory=sparc --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-targets=all --with-long-double-128 --disable-werror --enable-checking=yes --build=sparc-linux-gnu --host=sparc-linux-gnu --target=sparc-linux-gnu Thread model: posix gcc version 4.7.0 20111103 (experimental) [trunk revision 180824] (Debian 20111103-1) jurij@debian:~/ftree-sra$ gcc -g -O2 -ftree-sra pack.c -o pack jurij@debian:~/ftree-sra$ ./pack do_something called with item=-32767 Bus error jurij@debian:~/ftree-sra$ gcc -g -O2 -fno-tree-sra pack.c -o pack jurij@debian:~/ftree-sra$ ./pack do_something called with item=-32767 do_something called with item=-123456 jurij@debian:~/ftree-sra$