one of our more ambitious users discovered an ICE while building libmsn with -O1 -ftree-loop-distribution -floop-block. dropping any one of these flags makes it go away. i'll attach a reduced testcase which i believe is invalid code but still ICEs, and the original preprocessed sources. i also reproduced the error with a recent 4.4 branch checkout (-r152264).
$ gcc -v Using built-in specs. Target: x86_64-unknown-linux-gnu Configured with: /var/tmp/portage/sys-devel/gcc-4.4.1/work/gcc-4.4.1/configure --prefix=/usr --bindir=/usr/x86_64-unknown-linux-gnu/gcc-bin/4.4.1 --includedir=/usr/lib/gcc/x86_64-unknown-linux-gnu/4.4.1/include --datadir=/usr/share/gcc-data/x86_64-unknown-linux-gnu/4.4.1 --mandir=/usr/share/gcc-data/x86_64-unknown-linux-gnu/4.4.1/man --infodir=/usr/share/gcc-data/x86_64-unknown-linux-gnu/4.4.1/info --with-gxx-include-dir=/usr/lib/gcc/x86_64-unknown-linux-gnu/4.4.1/include/g++-v4 --host=x86_64-unknown-linux-gnu --build=x86_64-unknown-linux-gnu --disable-altivec --disable-fixed-point --with-ppl --with-cloog --disable-nls --with-system-zlib --disable-checking --disable-werror --enable-secureplt --enable-multilib --disable-libmudflap --disable-libssp --enable-libgomp --enable-cld --with-python-dir=/share/gcc-data/x86_64-unknown-linux-gnu/4.4.1/python --disable-libgcj --enable-languages=c,c++ --enable-shared --enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu --with-bugurl=http://bugs.gentoo.org/ --with-pkgversion='Gentoo 4.4.1 p1.0' Thread model: posix gcc version 4.4.1 (Gentoo 4.4.1 p1.0) -- Summary: ICE with -O1 -ftree-loop-distribution -floop-block Product: gcc Version: 4.4.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: dirtyepic at gentoo dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41562
