[Bug debug/100515] New: [12 Regression] ICE in output_rnglists, at dwarf2out.c:12294

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100515

            Bug ID: 100515
           Summary: [12 Regression] ICE in output_rnglists, at
                    dwarf2out.c:12294
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code, openmp
          Severity: normal
          Priority: P3
         Component: debug
          Assignee: unassigned at gcc dot gnu.org
          Reporter: asolokha at gmx dot com
  Target Milestone: ---

gcc-12.0.0-alpha20210509 snapshot (g:5e0236d3b0e0d7ad98bcee36128433fa755b5558)
ICEs when compiling the following testcase, reduced from
clang/testsuite/AST/ast-dump-openmp-taskloop-simd.c, w/ -O2 -fopenmp -g:

void
foo (int x)
{
#pragma omp taskloop
  for (int i = 0; i < x; i++)
    ;
}

void
bar (int x)
{
#pragma omp taskloop
  for (int i = 0; i < x; i++)
    ;
}

% gcc-12.0.0 -O2 -fopenmp -g -c wuhgfgai.c
wuhgfgai.c:15:1: internal compiler error: in output_rnglists, at
dwarf2out.c:12294
   15 | }
      | ^
0x64302c output_rnglists
       
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210509/work/gcc-12-20210509/gcc/dwarf2out.c:12294
0xa4d492 dwarf2out_finish
       
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210509/work/gcc-12-20210509/gcc/dwarf2out.c:32176