From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 29450 invoked by alias); 5 Jan 2010 23:03:37 -0000 Received: (qmail 27734 invoked by uid 48); 5 Jan 2010 23:03:22 -0000 Date: Tue, 05 Jan 2010 23:03:00 -0000 Subject: [Bug bootstrap/42628] New: [4.4 regression] ICE during bootstrap when compiling dyncast.cc: original tree changed by fold Message-ID: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "matt at use dot net" 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: 2010-01/txt/msg00593.txt.bz2 X-Bugzilla-Reason: CC doing a profiledbootstrap with trunk revision 155656, I ran into this crash: /home/matt/src/gcc-obj/./gcc/xgcc -shared-libgcc -B/home/matt/src/gcc-obj/./gcc -nostdinc++ -L/home/matt/src/gcc-obj/x86_64-unknown-linux-gnu/libstdc++-v3/src -L/home/matt/src/gcc-obj/x86_64-unknown-linux-gnu/libstdc++-v3/src/.libs -B/usr/local/x86_64-unknown-linux-gnu/bin/ -B/usr/local/x86_64-unknown-linux-gnu/lib/ -isystem /usr/local/x86_64-unknown-linux-gnu/include -isystem /usr/local/x86_64-unknown-linux-gnu/sys-include -I/home/matt/src/gcc-trunk/libstdc++-v3/../gcc -I/home/matt/src/gcc-obj/x86_64-unknown-linux-gnu/libstdc++-v3/include/x86_64-unknown-linux-gnu -I/home/matt/src/gcc-obj/x86_64-unknown-linux-gnu/libstdc++-v3/include -I/home/matt/src/gcc-trunk/libstdc++-v3/libsupc++ -fno-implicit-templates -Wall -Wextra -Wwrite-strings -Wcast-qual -fdiagnostics-show-location=once -ffunction-sections -fdata-sections -g -O0 -Wuninitialized -Warray-bounds -D_GNU_SOURCE -c ../gcc-trunk/libstdc++-v3/libsupc++/dyncast.cc -fPIC -DPIC -o ~/crashmatt@hargett-755:~/src/gcc-obj$ /home/matt/src/gcc-obj/./gcc/xgcc -shared-libgcc -B/home/matt/src/gcc-obj/./gcc -nostdinc++ -L/home/matt/src/gcc-obj/x86_64-unknown-linux-gnu/libstdc++-v3/src -L/home/matt/src/gcc-obj/x86_64-unknown-linux-gnu/libstdc++-v3/src/.libs -B/usr/local/x86_64-unknown-linux-gnu/bin/ -B/usr/local/x86_64-unknown-linux-gnu/lib/ -isystem /usr/local/x86_64-unknown-linux-gnu/include -isystem /usr/local/x86_64-unknown-linux-gnu/sys-include -I/home/matt/src/gcc-trunk/libstdc++-v3/../gcc -I/home/matt/src/gcc-obj/x86_64-unknown-linux-gnu/libstdc++-v3/include/x86_64-unknown-linux-gnu -I/home/matt/src/gcc-obj/x86_64-unknown-linux-gnu/libstdc++-v3/include -I/home/matt/src/gcc-trunk/libstdc++-v3/libsupc++ -fno-implicit-templates -Wall -Wextra -Wwrite-strings -Wcast-qual -fdiagnostics-show-location=once -ffunction-sections -fdata-sections -g -O1 -Wuninitialized -Warray-bounds -D_GNU_SOURCE -c ../gcc-trunk/libstdc++-v3/libsupc++/dyncast.cc -fPIC -DPIC -o ~/crash ../gcc-trunk/libstdc++-v3/libsupc++/dyncast.cc: In function ‘void* __cxxabiv1::__dynamic_cast(const void*, const __cxxabiv1::__class_type_info*, const __cxxabiv1::__class_type_info*, ptrdiff_t)’: ../gcc-trunk/libstdc++-v3/libsupc++/dyncast.cc:86:1: internal compiler error: fold check: original tree changed by fold valgrind 3.5.0 doesn't find anything worth reporting. Note that I used BOOT_CFLAGS and CFLAGS of -O3 -g, but in the commandline above I reduced it to -O1 as that still evoked the crash. -O0 works fine. Curiously, I couldn't reproduce when I manually added all the individual options listed for -O1 in the 4.5 man page. (Maybe the man page is missing one of the options?) I didn't see this issue when I did a profiledbootstrap about 4 weeks ago. Compiling the same file and same options with GCC 4.4 and 4.3 doesn't crash, and neither provides any notable valgrind output. -- Summary: [4.4 regression] ICE during bootstrap when compiling dyncast.cc: original tree changed by fold Product: gcc Version: 4.5.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: bootstrap AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: matt at use dot net GCC build triplet: x86_64-unknown-linux-gnu GCC host triplet: x86_64-unknown-linux-gnu GCC target triplet: x86_64-unknown-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42628