I just tried to compile lapack version 3.1.1 with the GNU Fortran compiler version 4.3 snapshot 20070914.
The compiler said /home/dcb/gcc/20070914/results/bin/gfortran -g -O3 -Wall -ftree-vectorize -c dlarre.f -o dlarre.o dlarre.f: In function 'dlarre': dlarre.f:1: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. Here is some help from valgrind ==32315== Invalid read of size 4 ==32315== at 0xAB06EA: vect_get_vec_defs_for_stmt_copy (tree.h:210) ==32315== by 0xAB3CC5: vectorizable_operation (tree-vect-transform.c:3987) ==32315== by 0xAC058B: vect_transform_stmt (tree-vect-transform.c:6095) ==32315== by 0xAC1707: vect_transform_loop (tree-vect-transform.c:7334) ==32315== by 0x80766B: vectorize_loops (tree-vectorizer.c:2507) ==32315== by 0x64BCC8: execute_one_pass (passes.c:1115) ==32315== by 0x64BE9F: execute_pass_list (passes.c:1168) ==32315== by 0x64BEB4: execute_pass_list (passes.c:1169) ==32315== by 0x64BEB4: execute_pass_list (passes.c:1169) ==32315== by 0x72480F: tree_rest_of_compilation (tree-optimize.c:404) ==32315== by 0x893DD3: cgraph_expand_function (cgraphunit.c:1070) ==32315== by 0x896024: cgraph_optimize (cgraphunit.c:1139) ==32315== Address 0x0 is not stack'd, malloc'd or (recently) free'd dlarre.f: In function 'dlarre': dlarre.f:1: internal compiler error: Segmentation fault Source attached. Flags -O2 -ftree-vectorize required. -- Summary: ice for fortran code with -O2 -ftree-vectorize Product: gcc Version: 4.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: dcb314 at hotmail dot com GCC host triplet: suse-linux-x86_64 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33449
