[Bug middle-end/107028] [13 Regression][OpenACC] ICE in install_var_field, at omp-low.cc:797

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107028

--- Comment #2 from Tobias Burnus <burnus at gcc dot gnu.org> ---
Minor postscript: While the following (reduced testcase in comment 0) looks a
bit odd,

  int data;
  ...
  #pragma acc data copyin(a, a.data)

the original uses a pointer. Thus, something like
  int *data;
  ...
  #pragma acc data copyin(a, a.data[0:n])

which is more sensible. This variant still gives an ICE.
However, either variant shouldn't ICE

BTW: GCC 12 has the following omplower dump for this variant:
   #pragma omp target oacc_data \
        map(to:a [len: 8]) map(alloc:a.data [len: 8]) \
        map(to:*_8 [len: _7]) map(attach:a.data [bias: 0])

--------------------------------------
long long n = 10;

class data_container {
 public:
  int *data;
};

void test2() {
  data_container a;
  a.data = (int*)__builtin_malloc (n * sizeof (int));
#pragma acc data copyin(a, a.data[0:n])
{ }
}