[Bug middle-end/113724] New: [14 Regression][OpenMP] ICE (segfault) when mapping a struct in omp_gather_mapping_groups_1

["burnus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113724

            Bug ID: 113724
           Summary: [14 Regression][OpenMP] ICE (segfault) when mapping a
                    struct in omp_gather_mapping_groups_1
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code, openmp
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: burnus at gcc dot gnu.org
  Target Milestone: ---

Created attachment 57295
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57295&action=edit
compile with: gcc -fopenmp target_struct_map.4

The attached testcase from the OpenMP examples document now ICEs in the
new omp_gather_mapping_groups_1 function.

* * *

target_struct_map.4.c: In function ‘main’:
target_struct_map.4.c:46:11: internal compiler error: Segmentation fault
   46 |   #pragma omp target data map(S1.p[:N],S1.p,S1.a,S1.b)
      |           ^~~
0x1045382 crash_signal
        /home/tburnus/repos/gcc/gcc/toplev.cc:317
0x7fc380e4251f ???
        ./signal/../sysdeps/unix/sysv/linux/x86_64/libc_sigaction.c:0
0xcf8263 tree_check(tree_node*, char const*, int, char const*, tree_code)
        /home/tburnus/repos/gcc/gcc/tree.h:3611
0xcf8263 omp_gather_mapping_groups_1
        /home/tburnus/repos/gcc/gcc/gimplify.cc:9583
0xd0bc32 omp_gather_mapping_groups
        /home/tburnus/repos/gcc/gcc/gimplify.cc:9610
0xd0bc32 gimplify_adjust_omp_clauses
        /home/tburnus/repos/gcc/gcc/gimplify.cc:13733
0xd23d27 gimplify_omp_workshare