When trying to compile rev. 13636 of VegaStrike (using the CMake build method) with gcc (GCC) 4.8.1 20130603 (Red Hat 4.8.1-1), g++ ICEs on the following compilation target on both a C2D E7500 and an AMD Athlon II 240e running fedora19 x86_64: [ermo@sheila build]$ make /usr/bin/cmake -H/home/ermo/VegaStrike/trunk/vegastrike -B/home/ermo/VegaStrike/trunk/vegastrike/build --check-build-system CMakeFiles/Makefile.cmake 0 /usr/bin/cmake -E cmake_progress_start /home/ermo/VegaStrike/trunk/vegastrike/build/CMakeFiles /home/ermo/VegaStrike/trunk/vegastrike/build/CMakeFiles/progress.marks make -f CMakeFiles/Makefile2 all make[1]: Entering directory `/home/ermo/VegaStrike/trunk/vegastrike/build' make -f CMakeFiles/OPcollide.dir/build.make CMakeFiles/OPcollide.dir/depend make[2]: Entering directory `/home/ermo/VegaStrike/trunk/vegastrike/build' cd /home/ermo/VegaStrike/trunk/vegastrike/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/ermo/VegaStrike/trunk/vegastrike /home/ermo/VegaStrike/trunk/vegastrike /home/ermo/VegaStrike/trunk/vegastrike/build /home/ermo/VegaStrike/trunk/vegastrike/build /home/ermo/VegaStrike/trunk/vegastrike/build/CMakeFiles/OPcollide.dir/DependInfo.cmake --color= make[2]: Leaving directory `/home/ermo/VegaStrike/trunk/vegastrike/build' make -f CMakeFiles/OPcollide.dir/build.make CMakeFiles/OPcollide.dir/build make[2]: Entering directory `/home/ermo/VegaStrike/trunk/vegastrike/build' make[2]: Nothing to be done for `CMakeFiles/OPcollide.dir/build'. make[2]: Leaving directory `/home/ermo/VegaStrike/trunk/vegastrike/build' /usr/bin/cmake -E cmake_progress_report /home/ermo/VegaStrike/trunk/vegastrike/build/CMakeFiles 1 2 3 4 5 6 7 8 [ 8%] Built target OPcollide make -f CMakeFiles/engine_com.dir/build.make CMakeFiles/engine_com.dir/depend make[2]: Entering directory `/home/ermo/VegaStrike/trunk/vegastrike/build' cd /home/ermo/VegaStrike/trunk/vegastrike/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/ermo/VegaStrike/trunk/vegastrike /home/ermo/VegaStrike/trunk/vegastrike /home/ermo/VegaStrike/trunk/vegastrike/build /home/ermo/VegaStrike/trunk/vegastrike/build /home/ermo/VegaStrike/trunk/vegastrike/build/CMakeFiles/engine_com.dir/DependInfo.cmake --color= make[2]: Leaving directory `/home/ermo/VegaStrike/trunk/vegastrike/build' make -f CMakeFiles/engine_com.dir/build.make CMakeFiles/engine_com.dir/build make[2]: Entering directory `/home/ermo/VegaStrike/trunk/vegastrike/build' /usr/bin/cmake -E cmake_progress_report /home/ermo/VegaStrike/trunk/vegastrike/build/CMakeFiles [ 8%] Building CXX object CMakeFiles/engine_com.dir/src/gfx/cockpit_generic.cpp.o /usr/bin/c++ -O2 -mtune=native -march=native -mfpmath=sse -msse3 -mmmx -ftree-vectorize -ffast-math -fassociative-math -funsafe-math-optimizations -funroll-loops -ftree-parallelize-loops=2 -DNV_CUBE_MAP -DBOOST_PYTHON_NO_PY_SIGNATURES -include config.h -pipe -Wall -fvisibility=hidden -I/home/ermo/VegaStrike/trunk/vegastrike/src -I/home/ermo/VegaStrike/trunk/vegastrike/src/cmd -I/home/ermo/VegaStrike/trunk/vegastrike/build -I/usr/include/python2.7 -I/home/ermo/VegaStrike/trunk/vegastrike/boost/1_53 -I/usr/include/AL -I/usr/include/SDL -I/usr/include/vorbis -I/usr/include/ogg -o CMakeFiles/engine_com.dir/src/gfx/cockpit_generic.cpp.o -c /home/ermo/VegaStrike/trunk/vegastrike/src/gfx/cockpit_generic.cpp /home/ermo/VegaStrike/trunk/vegastrike/src/gfx/cockpit_generic.cpp: In member function ‘bool Cockpit::Update()’: /home/ermo/VegaStrike/trunk/vegastrike/src/gfx/cockpit_generic.cpp:494:6: internal compiler error: Segmentation fault bool Cockpit::Update() ^ Please submit a full bug report, with preprocessed source if appropriate. See <http://bugzilla.redhat.com/bugzilla> for instructions. Preprocessed source stored into /tmp/ccnOEb2C.out file, please attach this to your bugreport. make[2]: *** [CMakeFiles/engine_com.dir/src/gfx/cockpit_generic.cpp.o] Error 1 make[2]: Leaving directory `/home/ermo/VegaStrike/trunk/vegastrike/build' make[1]: *** [CMakeFiles/engine_com.dir/all] Error 2 make[1]: Leaving directory `/home/ermo/VegaStrike/trunk/vegastrike/build' make: *** [all] Error 2 [ermo@sheila build]$ It turns out that the minimal repro case is adding just -mtune=native -march=native -ffast-math -ftree-parallelize-loops=2 to that particular compilation target. Note that on fedora18, which uses gcc-4.7.2, the exact same configuration does not result in an ICE. Vega Strike build instructions can be found here: http://wiki.vega-strike.org/HowTo:Compile_from_SVN_on_Linux I used the following ccmake configuration (only differences to default listed): CPUINTEL_native ON CPU_SMP 2 DISABLE_FFMPEG ON CMAKE_VERBOSE_MAKEFILE ON (only listed in the advanced config options) P.S. I am aware that there might be some redundancy in the build configuration CFLAGS.
Per the bug reporting instructions, please attach a preprocessed reproducer. If at all possible, please do your best to reduce it to a manageable size: http://gcc.gnu.org/wiki/A_guide_to_testcase_reduction
Created attachment 30564 [details] preprocessed source
@Paolo: *sigh* -- I suspected that it wasn't ever going to be as simple as describing what I did to trigger the ICE. Sorry for polluting bugzilla with an incomplete bug-report. I'll see what I can do about educating myself on the ways of proper gcc bug-reporting -- you never know if it might come in handy one day. =)
Confirmed with just -Ofast -ftree-parallelize-loops=2. #0 __strlen_sse2_pminub () at ../sysdeps/x86_64/multiarch/strlen-sse2-pminub.S:38 #1 0x0000000000cf064b in get_identifier (text=0x0) at /data/repos/gcc/trunk/gcc/stringpool.c:111 #2 0x0000000000d96f46 in make_temp_ssa_name (type=0x7ffff5fb12a0, stmt=0x0, name=0x0) at /data/repos/gcc/trunk/gcc/tree-flow-inline.h:1222 #3 0x0000000000d97ee1 in take_address_of (obj=0x7ffff1449f50, type=0x7ffff5fb12a0, entry=0x7ffff0ddad58, decl_address=..., gsi=0x7fffffffd4b0) at /data/repos/gcc/trunk/gcc/tree-parloops.c:499 #4 0x0000000000d9841e in eliminate_local_variables_1 (tp=0x7ffff1840450, walk_subtrees=0x7fffffffd2b8, data=0x7fffffffd3e0) at /data/repos/gcc/trunk/gcc/tree-parloops.c:613 #5 0x0000000000f6f75e in walk_tree_1 (tp=0x7ffff1840450, func=0xd982f3 <eliminate_local_variables_1(tree*, int*, void*)>, data=0x7fffffffd3e0, pset=0x0, lh=0x0) at /data/repos/gcc/trunk/gcc/tree.c:10916 #6 0x0000000000a9b35d in walk_gimple_op (stmt=0x7ffff1840410, callback_op=0xd982f3 <eliminate_local_variables_1(tree*, int*, void*)>, wi=0x7fffffffd3e0) at /data/repos/gcc/trunk/gcc/gimple.c:1428 #7 0x0000000000d98727 in eliminate_local_variables_stmt (entry=0x7ffff0ddad58, gsi=0x7fffffffd4b0, decl_address=...) at /data/repos/gcc/trunk/gcc/tree-parloops.c:700 #8 0x0000000000d98881 in eliminate_local_variables (entry=0x7ffff0ddad58, exit=0x7ffff1b40a80) at /data/repos/gcc/trunk/gcc/tree-parloops.c:743 #9 0x0000000000d9c358 in gen_parallel_loop (loop=0x7ffff0d4bea0, reduction_list=..., n_threads=2, niter=0x7fffffffd5f0) at /data/repos/gcc/trunk/gcc/tree-parloops.c:1864 #10 0x0000000000d9d393 in parallelize_loops () at /data/repos/gcc/trunk/gcc/tree-parloops.c:2218
extern "C" float sqrtf (float); extern int a; extern int b; struct Vector { float i; float j; float Magnitude() const { return sqrtf( i*i+j*j ); } }; void f(){ int i = a; int end = b; for (; i != end; ++i) { float tmag = Vector().Magnitude(); } }
Thanks Marc.
Hello, I got the same under Debian Jessie $ gcc-4.8 -v Using built-in specs. COLLECT_GCC=gcc-4.8 COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.8/lto-wrapper Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Debian 4.8.1-2' --with-bugurl=file:///usr/share/doc/gcc-4.8/README.Bugs --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.8 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.8 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.8-amd64 --with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch --with-arch-32=i586 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu Thread model: posix gcc version 4.8.1 (Debian 4.8.1-2)
Created attachment 30666 [details] gcc49-pr58006.patch Untested fix.
Author: jakub Date: Sun Aug 18 15:23:24 2013 New Revision: 201827 URL: http://gcc.gnu.org/viewcvs?rev=201827&root=gcc&view=rev Log: PR tree-optimization/58006 * tree-parloops.c (take_address_of): Don't ICE if get_name returns NULL. (eliminate_local_variables_stmt): Remove clobber stmts. * g++.dg/opt/pr58006.C: New test. Added: trunk/gcc/testsuite/g++.dg/opt/pr58006.C Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/tree-parloops.c Author: jakub Date: Sun Aug 18 15:24:12 2013 New Revision: 201828 URL: http://gcc.gnu.org/viewcvs?rev=201828&root=gcc&view=rev Log: PR tree-optimization/58006 * tree-parloops.c (take_address_of): Don't ICE if get_name returns NULL. (eliminate_local_variables_stmt): Remove clobber stmts. * g++.dg/opt/pr58006.C: New test. Added: branches/gcc-4_8-branch/gcc/testsuite/g++.dg/opt/pr58006.C Modified: branches/gcc-4_8-branch/gcc/ChangeLog branches/gcc-4_8-branch/gcc/testsuite/ChangeLog branches/gcc-4_8-branch/gcc/tree-parloops.c