------- Comment #11 from jv244 at cam dot ac dot uk 2008-12-13 08:39 ------- (In reply to comment #10) > (In reply to comment #9) > > Unfortunately, '-fgraphite -fgraphite-identity -floop-block > > -floop-strip-mine > > -floop-interchang' goes generate an executable, but it is miscompiled and > > segfaults. > > reduced testcase in PR38492 > After Sebastian Pop's fix for PR38492 the test run goes a bit further but segfaults again, now with a different trace:
Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x2b0112f77440 (LWP 18589)] 0x0000000000df557b in __fist_neighbor_lists_MOD_give_ijk_subcell () (gdb) bt #0 0x0000000000df557b in __fist_neighbor_lists_MOD_give_ijk_subcell () #1 0x0000000000df7742 in __fist_neighbor_lists_MOD_build_neighbor_lists () #2 0x0000000000dfd0de in __fist_neighbor_lists_MOD_build_fist_neighbor_lists () #3 0x000000000126f50a in __topology_generate_util_MOD_topology_generate_bond () #4 0x0000000001223746 in __topology_MOD_connectivity_control () #5 0x00000000012247db in __topology_MOD_topology_control () #6 0x000000000113cf43 in __qs_environment_MOD_qs_init () #7 0x00000000007facaa in __qs_main_MOD_quickstep_create_force_env () #8 0x0000000000434416 in __f77_interface_MOD_create_force_env () #9 0x000000000040a40e in __cp2k_runs_MOD_cp2k_run () #10 0x000000000040dc47 in __cp2k_runs_MOD_run_input () #11 0x0000000000403c01 in MAIN__ () #12 0x00000000014483ba in main (argc=2, argv=0x7fff99be3828) at /scratch/vondele/gcc/graphite/libgfortran/fmain.c:21 There is an earlier error by valgrind: ==18647== Conditional jump or move depends on uninitialised value(s) ==18647== at 0xDF69A3: __fist_neighbor_lists_MOD_build_neighbor_lists (in /scratch/vondele/clean/cp2k/exe/Linux-x86-6 4-gfortran/cp2k.sopt) ==18647== by 0xDFD0DD: __fist_neighbor_lists_MOD_build_fist_neighbor_lists (in /scratch/vondele/clean/cp2k/exe/Linux- x86-64-gfortran/cp2k.sopt) ==18647== by 0x126F509: __topology_generate_util_MOD_topology_generate_bond (in /scratch/vondele/clean/cp2k/exe/Linux -x86-64-gfortran/cp2k.sopt) ==18647== by 0x1223745: __topology_MOD_connectivity_control (in /scratch/vondele/clean/cp2k/exe/Linux-x86-64-gfortran /cp2k.sopt) ==18647== by 0x12247DA: __topology_MOD_topology_control (in /scratch/vondele/clean/cp2k/exe/Linux-x86-64-gfortran/cp2 k.sopt) ==18647== by 0x113CF42: __qs_environment_MOD_qs_init (in /scratch/vondele/clean/cp2k/exe/Linux-x86-64-gfortran/cp2k.s opt) ==18647== by 0x7FACA9: __qs_main_MOD_quickstep_create_force_env (in /scratch/vondele/clean/cp2k/exe/Linux-x86-64-gfor tran/cp2k.sopt) ==18647== by 0x434415: __f77_interface_MOD_create_force_env (in /scratch/vondele/clean/cp2k/exe/Linux-x86-64-gfortran /cp2k.sopt) ==18647== by 0x40A40D: __cp2k_runs_MOD_cp2k_run (in /scratch/vondele/clean/cp2k/exe/Linux-x86-64-gfortran/cp2k.sopt) ==18647== by 0x40DC46: __cp2k_runs_MOD_run_input (in /scratch/vondele/clean/cp2k/exe/Linux-x86-64-gfortran/cp2k.sopt) ==18647== by 0x403C00: MAIN__ (in /scratch/vondele/clean/cp2k/exe/Linux-x86-64-gfortran/cp2k.sopt) ==18647== by 0x14483B9: main (fmain.c:21) (obviously absent if compiled without graphite). build_neighbor_lists (fist_neighbor_lists.F) is pretty loopy code, so well.. even though the routine is not so long, it wont be easy to reduce it, as it depends on quite a few types defined elsewhere (it would be nice if the fortran frontend could generate 'preprocessed' source without module dependencies, they're similar to C header files.). -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38431
