------- Comment #1 from burnus at gcc dot gnu dot org 2008-05-02 15:48 ------- This GCC version does not make sense: 4.4.0-20060501. I assume you mean 20080501.
The mentioned file is available at: http://www.netlib.org/lapack/single/sgtrfs.f I can reproduce the crash with: $ gfortran -S -O2 -ftree-loop-distribution "sgtrfs.f" sgtrfs.f: In function sgtrfs: sgtrfs.f:1: internal compiler error: Segmentation fault Valgrind shows: ==32764== Use of uninitialised value of size 8 ==32764== at 0x4D4520: bitmap_bit_p (bitmap.c:548) ==32764== by 0xAB76DE: compute_dominance_frontiers (cfganal.c:1273) ==32764== by 0x74F70E: update_ssa (tree-into-ssa.c:3281) ==32764== by 0x7F2D29: rewrite_into_loop_closed_ssa (tree-ssa-loop-manip.c:377) ==32764== by 0x754967: tree_loop_distribution (tree-loop-distribution.c:1029) ==32764== by 0x678576: execute_one_pass (passes.c:1136) ==32764== by 0x6787B4: execute_pass_list (passes.c:1191) -- burnus at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Component|fortran |middle-end GCC build triplet|i686-pc-linux-gnu | GCC host triplet|i686-pc-linux-gnu | GCC target triplet|i686-pc-linux-gnu | Keywords| |ice-on-valid-code Summary| Segmentation fault when |ICE (segmentation fault) |compiling lapack with |with -ftree-loop- |fortran 4.4.0-20060501 |distribution http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36110
