The attached code (from lapack) segfaults gfortran trunk 20080116 with -O3 -funroll-loops, succeeds without -funroll-loops.
$ gfortran-4.3 -funroll-loops -save-temps -O3 -c seispack.f seispack.f: In function 'invit': seispack.f:1742: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. -- Summary: [arm] ICE (segfault) with gfortran -O3 -funroll-loops Product: gcc Version: 4.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: debian-gcc at lists dot debian dot org GCC target triplet: arm-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35079