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* [Bug tree-optimization/96424] New: ICE: verify_flow_info failed (error: wrong outgoing edge flags at end of bb 23); or ICE: Segmentation fault (in expand_omp_for_init_vars/contains_struct_check)
@ 2020-08-03  3:03 asolokha at gmx dot com
  2020-08-07 10:08 ` [Bug tree-optimization/96424] " jakub at gcc dot gnu.org
                   ` (2 more replies)
  0 siblings, 3 replies; 4+ messages in thread
From: asolokha at gmx dot com @ 2020-08-03  3:03 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96424

            Bug ID: 96424
           Summary: ICE: verify_flow_info failed (error: wrong outgoing
                    edge flags at end of bb 23); or ICE: Segmentation
                    fault (in
                    expand_omp_for_init_vars/contains_struct_check)
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Keywords: openmp
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: asolokha at gmx dot com
  Target Milestone: ---

1.

g++-11.0.0-alpha20200726 snapshot (g:39ddfef9a5c24acf6412236f52f6716c8e0ebc9e)
ICEs when compiling the following testcase, reduced from
libgomp/testsuite/libgomp.c/loop-18.c, w/ -fbranch-probabilities
-fnon-call-exceptions -fopenmp:

int
main ()
{
  int i, j;

#pragma omp for collapse (2)
  for (i = 0; i < 1; ++i)
    for (j = 0; j <= i; ++j)
      {
      }

  return 0;
}

% g++-11.0.0 -fbranch-probabilities -fnon-call-exceptions -fopenmp -c
qr6y7wzi.c
qr6y7wzi.c: In function 'int main()':
qr6y7wzi.c:13:1: error: wrong outgoing edge flags at end of bb 23
   13 | }
      | ^
during IPA pass: profile
qr6y7wzi.c:13:1: internal compiler error: verify_flow_info failed
0xb80b56 verify_flow_info()
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200726/work/gcc-11-20200726/gcc/cfghooks.c:269
0x105e7e7 checking_verify_flow_info
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200726/work/gcc-11-20200726/gcc/cfghooks.h:212
0x105e7e7 gimple_flow_call_edges_add
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200726/work/gcc-11-20200726/gcc/tree-cfg.c:8622
0xf81fdd branch_prob(bool)
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200726/work/gcc-11-20200726/gcc/profile.c:1099
0x10fe836 tree_profiling
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200726/work/gcc-11-20200726/gcc/tree-profile.c:779
0x10fe836 execute
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200726/work/gcc-11-20200726/gcc/tree-profile.c:885

2.

Replacing <= w/ < yields the following instead:

--- qr6y7wzi.c
+++ #<buffer qr6y7wzi.c>
@@ -5,7 +5,7 @@ main ()

 #pragma omp for collapse (2)
   for (i = 0; i < 1; ++i)
-    for (j = 0; j <= i; ++j)
+    for (j = 0; j < i; ++j)
       {
       }


% g++-11.0.0 -fbranch-probabilities -fnon-call-exceptions -fopenmp -c
qr6y7wzi.c
during GIMPLE pass: ompexp
qr6y7wzi.c: In function 'int main()':
qr6y7wzi.c:6:9: internal compiler error: Segmentation fault
    6 | #pragma omp for collapse (2)
      |         ^~~
0x1028baf crash_signal
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200726/work/gcc-11-20200726/gcc/toplev.c:328
0xec69ae contains_struct_check(tree_node*, tree_node_structure_enum, char
const*, int, char const*)
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200726/work/gcc-11-20200726/gcc/tree.h:3416
0xec69ae expand_omp_for_init_vars
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200726/work/gcc-11-20200726/gcc/omp-expand.c:2271
0xeccbe2 expand_omp_for_static_nochunk
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200726/work/gcc-11-20200726/gcc/omp-expand.c:4969
0xedc6b4 expand_omp_for
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200726/work/gcc-11-20200726/gcc/omp-expand.c:7421
0xedcb8a expand_omp
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200726/work/gcc-11-20200726/gcc/omp-expand.c:9691
0xede96c execute_expand_omp
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200726/work/gcc-11-20200726/gcc/omp-expand.c:9920

^ permalink raw reply	[flat|nested] 4+ messages in thread
end of thread, other threads:[~2020-08-08 11:36 UTC | newest]

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2020-08-03  3:03 [Bug tree-optimization/96424] New: ICE: verify_flow_info failed (error: wrong outgoing edge flags at end of bb 23); or ICE: Segmentation fault (in expand_omp_for_init_vars/contains_struct_check) asolokha at gmx dot com
2020-08-07 10:08 ` [Bug tree-optimization/96424] " jakub at gcc dot gnu.org
2020-08-08  9:09 ` cvs-commit at gcc dot gnu.org
2020-08-08 11:36 ` jakub at gcc dot gnu.org

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