https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95063

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Reduced testcase that is valid:

template <typename T>
struct S {
  T a:12;
  S () : a(0)
  {
#pragma omp for linear(a)
    for (int k = 0; k < 64; ++k)
      a++;
  }
};

S<int> s;

I guess this boils down to what type should the artificial
DECL_OMP_PRIVATIZED_MEMBER vars have for bit-fields, without it being a
template or without the bitfield type being a dependent type
omp_privatize_field would create the bitfield type, which is I think right, the
artificial var just stands for the COMPONENT_REF of this->bit_field (just will
have to check what exactly we do during expansion with that).

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