http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49086
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2011-05-20 16:49:58 UTC --- Backtrace (gdb) run -DHAVE_CONFIG_H -I. -I../../../work/libgomp -I../../../work/libgomp/config/bsd -I../../../work/libgomp/config/posix -I../../../work/libgomp -Wall -Werror -g -O2 -MT single.lo -MD -MP -MF .deps/single.Tpo ../../../work/libgomp/task.cStarting program: /opt/gcc/build_w/gcc/cc1 -DHAVE_CONFIG_H -I. -I../../../work/libgomp -I../../../work/libgomp/config/bsd -I../../../work/libgomp/config/posix -I../../../work/libgomp -Wall -Werror -g -O2 -MT single.lo -MD -MP -MF .deps/single.Tpo ../../../work/libgomp/task.c _OSSwapInt16 _OSSwapInt32 _OSSwapInt64 __darwin_fd_isset gomp_mutex_init gomp_mutex_lock gomp_mutex_unlock gomp_mutex_destroy gomp_barrier_wait_start gomp_barrier_last_thread gomp_barrier_wait_last gomp_team_barrier_set_task_pending gomp_team_barrier_clear_task_pending gomp_team_barrier_set_waiting_for_tasks gomp_team_barrier_waiting_for_tasks gomp_team_barrier_done gomp_ptrlock_init gomp_ptrlock_get gomp_ptrlock_set gomp_ptrlock_destroy gomp_thread gomp_icv gomp_finish_task gomp_work_share_init_done __inline_memcpy_chk __inline_memmove_chk __inline_memset_chk __inline_strcpy_chk __inline_stpcpy_chk __inline_strncpy_chk __inline_strcat_chk __inline_strncat_chk gomp_init_task gomp_end_task gomp_clear_parent GOMP_task gomp_barrier_handle_tasks GOMP_taskwait Analyzing compilation unit Performing interprocedural optimizations <*free_lang_data> <visibility> <early_local_cleanups> <emutls> <whole-program> <ipa-profile> <cp> <inline> <pure-const> <static-var>Assembling functions: gomp_init_task gomp_end_task GOMP_task Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_INVALID_ADDRESS at address: 0x0000000000000020 0x0000000100591de0 in dominated_by_p (dir=CDI_DOMINATORS, bb1=0x0, bb2=0x101357a90) at ../../work/gcc/dominance.c:972 972 struct et_node *n1 = bb1->dom[dir_index], *n2 = bb2->dom[dir_index]; (gdb) bt #0 0x0000000100591de0 in dominated_by_p (dir=CDI_DOMINATORS, bb1=0x0, bb2=0x101357a90) at ../../work/gcc/dominance.c:972 #1 0x00000001007a7d8d in or_comparisons_1 (code1=EQ_EXPR, op1a=0x101386cd0, op1b=0x14300fe40, code2=EQ_EXPR, op2a=0x101386d70, op2b=0x10127aca0) at ../../work/gcc/gimple-fold.c:2747 #2 0x00000001007a7ee0 in maybe_fold_or_comparisons (code1=EQ_EXPR, op1a=0x101386d70, op1b=0x10127aca0, code2=EQ_EXPR, op2a=0x101386cd0, op2b=0x14300fe40) at ../../work/gcc/gimple-fold.c:2790 #3 0x0000000100c30753 in ifcombine_iforif (inner_cond_bb=0x101357bc8, outer_cond_bb=0x101357a90) at ../../work/gcc/tree-ssa-ifcombine.c:521 #4 0x0000000100c3094f in tree_ssa_ifcombine_bb (inner_cond_bb=0x101357bc8) at ../../work/gcc/tree-ssa-ifcombine.c:611 #5 0x0000000100c30a9a in tree_ssa_ifcombine () at ../../work/gcc/tree-ssa-ifcombine.c:637 #6 0x0000000100995f58 in execute_one_pass (pass=0x1011fd9a0) at ../../work/gcc/passes.c:1556 #7 0x00000001009963dc in execute_pass_list (pass=0x1011fd9a0) at ../../work/gcc/passes.c:1610 #8 0x00000001009963fa in execute_pass_list (pass=0x1011fd160) at ../../work/gcc/passes.c:1611 #9 0x0000000100b83eb6 in tree_rest_of_compilation (fndecl=0x1431f0400) at ../../work/gcc/tree-optimize.c:417 #10 0x00000001004ff93e in cgraph_expand_function (node=0x1012c3250) at ../../work/gcc/cgraphunit.c:1630 #11 0x00000001004ffb0a in cgraph_expand_all_functions () at ../../work/gcc/cgraphunit.c:1689 #12 0x0000000100500273 in cgraph_optimize () at ../../work/gcc/cgraphunit.c:1952 #13 0x00000001004fcc80 in cgraph_finalize_compilation_unit () at ../../work/gcc/cgraphunit.c:1126 #14 0x00000001000374c2 in c_write_global_declarations () at ../../work/gcc/c-decl.c:9840 #15 0x0000000100ab3600 in compile_file () at ../../work/gcc/toplev.c:586 #16 0x0000000100ab61a6 in do_compile () at ../../work/gcc/toplev.c:1905 #17 0x0000000100ab6321 in toplev_main (argc=18, argv=0x7fff5fbfd830) at ../../work/gcc/toplev.c:1977 #18 0x000000010013c829 in main (argc=18, argv=0x7fff5fbfd830) at ../../work/gcc/main.c:36
