[Bug bootstrap/49086] New: [4.7 Regression] libgomp/task.c:79:1: internal compiler error: Segmentation fault

[Bug bootstrap/49086] New: [4.7 Regression] libgomp/task.c:79:1: internal compiler error: Segmentation fault

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49086

           Summary: [4.7 Regression] libgomp/task.c:79:1: internal
                    compiler error: Segmentation fault
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: dominiq@lps.ens.fr


Created attachment 24306
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24306
Preprocessed file task.i

On x86_64-apple-darwin10 at revision 173960, bootstrap fails with the following
ICE:

[macbook] x86_64-apple-darwin10.7.0/libgomp% /opt/gcc/build_w/./gcc/xgcc
-B/opt/gcc/build_w/./gcc/ -B/opt/gcc/gcc4.7w/x86_64-apple-darwin10.7.0/bin/
-B/opt/gcc/gcc4.7w/x86_64-apple-darwin10.7.0/lib/ -DHAVE_CONFIG_H -I.
-I../../../work/libgomp -I../../../work/libgomp/config/bsd
-I../../../work/libgomp/config/posix -I../../../work/libgomp -Wall -pthread
-Werror -g -O2 -MT single.lo -MD -MP -MF .deps/single.Tpo -c
../../../work/libgomp/task.c
../../../work/libgomp/task.c: In function 'GOMP_task':
../../../work/libgomp/task.c:79:1: internal compiler error: Segmentation fault

[Bug bootstrap/49086] [4.7 Regression] libgomp/task.c:79:1: internal compiler error: Segmentation fault

[dominiq at lps dot ens.fr]

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

[Bug bootstrap/49086] [4.7 Regression] libgomp/task.c:79:1: internal compiler error: Segmentation fault

[hubicka at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49086

Jan Hubicka <hubicka at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hubicka at gcc dot gnu.org
             Blocks|                            |45375

--- Comment #2 from Jan Hubicka <hubicka at gcc dot gnu.org> 2011-05-20 17:48:16 UTC ---
Also reproduce during mozilla LTO build today.

[Bug bootstrap/49086] [4.7 Regression] libgomp/task.c:79:1: internal compiler error: Segmentation fault

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49086

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2011.05.20 18:07:57
         AssignedTo|unassigned at gcc dot       |jakub at gcc dot gnu.org
                   |gnu.org                     |
     Ever Confirmed|0                           |1

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-05-20 18:07:57 UTC ---
Created attachment 24308
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24308
gcc46-pr49086.patch

Can you please try this patch?

[Bug bootstrap/49086] [4.7 Regression] libgomp/task.c:79:1: internal compiler error: Segmentation fault

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49086

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-05-20 18:23:40 UTC ---
Author: jakub
Date: Fri May 20 18:23:36 2011
New Revision: 173968

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=173968
Log:
    PR bootstrap/49086
    * gimple-fold.c (and_comparisons_1, or_comparisons_1): Return NULL
    for PHI args that are SSA_NAME_IS_DEFAULT_DEF.

Modified:
    branches/gcc-4_6-branch/gcc/ChangeLog
    branches/gcc-4_6-branch/gcc/gimple-fold.c

[Bug bootstrap/49086] [4.7 Regression] libgomp/task.c:79:1: internal compiler error: Segmentation fault

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49086

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-05-20 18:22:52 UTC ---
Author: jakub
Date: Fri May 20 18:22:49 2011
New Revision: 173967

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=173967
Log:
    PR bootstrap/49086
    * gimple-fold.c (and_comparisons_1, or_comparisons_1): Return NULL
    for PHI args that are SSA_NAME_IS_DEFAULT_DEF.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple-fold.c

[Bug bootstrap/49086] [4.7 Regression] libgomp/task.c:79:1: internal compiler error: Segmentation fault

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49086

Dominique d'Humieres <dominiq at lps dot ens.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED

--- Comment #6 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2011-05-20 22:58:23 UTC ---
Bootstrapped revision 173968. Closing as fixed. Thanks.