When I compile my application with the actual snapshot of gcc41 I get an ICE when I enable autovectorisation and -Woverloaded-virtual.
last working snapshot is: gcc-4.1-20050625 first failing snapshot is: gcc-4.1-20050702 Michael Cieslinski g++41h -O3 -ftree-vectorize -Woverloaded-virtual -c FiltMgr.ii -o FiltMgr.o FiltMgr.ii: In member function 'EVT FilterMgr::calcKernel()': FiltMgr.ii:13912: error: definition in block 14 does not dominate use in block 19 for SSA_NAME: TMT.1129_15 in statement: TMT.1129_526 = PHI <TMT.1129_15(19), TMT.1129_15(18)>; PHI argument TMT.1129_15 for PHI node TMT.1129_526 = PHI <TMT.1129_15(19), TMT.1129_15(18)>; FiltMgr.ii:13912: internal compiler error: verify_ssa failed Please submit a full bug report, with preprocessed source if appropriate. g++41h -v Using built-in specs. Target: x86_64-unknown-linux-gnu Configured with: ../gcc-4.1-20050723/configure --prefix=/usr/local/gcc41h --program-suffix=41h --with-arch=opteron --enable-languages=c,c++ --enable-checking Thread model: posix gcc version 4.1.0 20050723 (experimental) -- Summary: ICE: verify_ssa failed with -O3 -ftree-vectorize - Woverloaded-virtual Product: gcc Version: 4.1.0 Status: UNCONFIRMED Severity: normal Priority: P2 Component: tree-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: micis at gmx dot de CC: gcc-bugs at gcc dot gnu dot org 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=23059