[Bug c++/108422] New: [13 Regression] ICE: base pointer cycle detected

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108422

            Bug ID: 108422
           Summary: [13 Regression] ICE: base pointer cycle detected
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

Started between 20220911 and 20220918 :


$ cat z1.cc
void foo (int a)
{
  auto bar = [&]()
  {
    #pragma omp target parallel
    #pragma omp target
    ++a;
  };
  bar();
}


$ cat z2.cc
void foo (int a)
{
  auto bar = [&]()
  {
    #pragma omp target
    #pragma omp target
    ++a;
  };
  bar();
}


$ g++-13-20230115 -c z1.cc -fopenmp
when processing group:
map(to:*__closure)
z1.cc: In lambda function:
z1.cc:5:13: internal compiler error: base pointer cycle detected
    5 |     #pragma omp target parallel
      |             ^~~
0xc0a6f3 omp_tsort_mapping_groups_1
        ../../gcc/gimplify.cc:9603
0xc0a515 omp_tsort_mapping_groups_1
        ../../gcc/gimplify.cc:9646
0xc0a515 omp_tsort_mapping_groups_1
        ../../gcc/gimplify.cc:9646
0xc1ee00 omp_tsort_mapping_groups
        ../../gcc/gimplify.cc:9684
0xc1ee00 gimplify_scan_omp_clauses
        ../../gcc/gimplify.cc:10771
0xc24fce gimplify_omp_workshare
        ../../gcc/gimplify.cc:15390
0xc10cca gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc/gimplify.cc:16903
0xc14308 gimplify_stmt(tree_node**, gimple**)
        ../../gcc/gimplify.cc:7219
0xc14861 gimplify_bind_expr
        ../../gcc/gimplify.cc:1430
0xc10eea gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc/gimplify.cc:16562
0xc14308 gimplify_stmt(tree_node**, gimple**)
        ../../gcc/gimplify.cc:7219
0xc11ccb gimplify_statement_list
        ../../gcc/gimplify.cc:2019
0xc11ccb gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc/gimplify.cc:16806
0xc14308 gimplify_stmt(tree_node**, gimple**)
        ../../gcc/gimplify.cc:7219
0xc14861 gimplify_bind_expr
        ../../gcc/gimplify.cc:1430
0xc10eea gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc/gimplify.cc:16562
0xc14308 gimplify_stmt(tree_node**, gimple**)
        ../../gcc/gimplify.cc:7219
0xc153ab gimplify_body(tree_node*, bool)
        ../../gcc/gimplify.cc:17623
0xc157fd gimplify_function_tree(tree_node*)
        ../../gcc/gimplify.cc:17822
0xa988e7 cgraph_node::analyze()
        ../../gcc/cgraphunit.cc:676