Encountered this ICE with: gfc -c -O3 -ffast-math -march=nocona
Using built-in specs. Target: x86_64-unknown-linux-gnu Configured with: ../gcc43/configure --prefix=/home/jerry/gcc/usr --enable-languages=c,fortran --disable-libmudflap --enable-libgomp Thread model: posix gcc version 4.3.0 20070216 (experimental) /home/jerry/cp2k/makefiles/../src/mc_coordinates.F: In function ‘check_for_overlap’: /home/jerry/cp2k/makefiles/../src/mc_coordinates.F:137: internal compiler error: in operand_equal_p, at fold-const.c:2717 Also reported in 29975 [meta-bugs] ICEs with CP2K, but thought I should start a clean PR on this. -- Summary: CP2K ICE in mc_coordinates.F:137 Product: gcc Version: 4.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: jvdelisle at gcc dot gnu dot org GCC host triplet: x86_64-unknown-linux-gnu OtherBugsDependingO 29975 nThis: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30817