[Bug c/99322] New: [11 Regression] ICE in change_scope, at final.c:1480

["gscfq@t-online.de" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99322

            Bug ID: 99322
           Summary: [11 Regression] ICE in change_scope, at final.c:1480
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

Changed between 20201018 and 20201108 :


$ cat z1.c
void g ();
void f ()
{
  #pragma omp parallel
  for (;;)
    for (int i = 0; i < 8; ++i)
      g ();
  { L1: }
  &&L1;
}


$ gcc-11-20210228 -c z1.c -fopenmp -O2 -g
$ gcc-11-20210228 -c z1.c -fopenmp -O3
$
$ gcc-11-20210228 -c z1.c -fopenmp -O3 -g
during RTL pass: final
z1.c: In function 'f._omp_fn.0':
z1.c:4:11: internal compiler error: Segmentation fault
    4 |   #pragma omp parallel
      |           ^~~
0xb5eeff crash_signal
        ../../gcc/toplev.c:327
0x87295d change_scope
        ../../gcc/final.c:1480
0x8792c1 reemit_insn_block_notes
        ../../gcc/final.c:1581
0x8792c1 final_start_function_1
        ../../gcc/final.c:1785
0x879549 rest_of_handle_final
        ../../gcc/final.c:4675
0x879549 execute
        ../../gcc/final.c:4754

---

z1.c: In function 'f._omp_fn.0':
z1.c:10:1: error: location references block not in block tree
   10 | }
      | ^
L1:
during IPA pass: *free_lang_data
z1.c:10:1: internal compiler error: verify_gimple failed
0xd94884 verify_gimple_in_cfg(function*, bool)
        ../../gcc/tree-cfg.c:5477
0xc45d3e execute_function_todo
        ../../gcc/passes.c:2042
0xc46b7d do_per_function
        ../../gcc/passes.c:1694
0xc46be2 execute_todo
        ../../gcc/passes.c:2096