Re: C++ PATCH for c++/68703 (dependent vector length)

[Jakub Jelinek <jakub@redhat.com>]

On Tue, Aug 09, 2016 at 06:02:45PM -0400, Jason Merrill wrote:
> diff --git a/gcc/testsuite/g++.dg/ext/vector32.C b/gcc/testsuite/g++.dg/ext/vector32.C
> new file mode 100644
> index 0000000..8901d0b
> --- /dev/null
> +++ b/gcc/testsuite/g++.dg/ext/vector32.C
> @@ -0,0 +1,18 @@
> +// PR c++/68703
> +
> +template <int N>
> +struct D {
> +  int v __attribute__((vector_size (N * sizeof (int))));
> +  int f1 () { return this->v[N-1]; }
> +  int f2 () { return v[N-1]; }
> +};
> +
> +int
> +main ()
> +{
> +  D<4> a = { { 0, 1, 2, 3 } };
> +  D<8> b = { { 0, 1, 2, 3, 4, 5, 6, 7 } };
> +  if (a.f1 () != 3 || a.f2 () != 3
> +      || b.f1 () != 7 || b.f2 () != 7)
> +    __builtin_abort ();
> +}
> diff --git a/gcc/testsuite/g++.dg/ext/vector32a.C b/gcc/testsuite/g++.dg/ext/vector32a.C
> new file mode 100644
> index 0000000..8901d0b
> --- /dev/null
> +++ b/gcc/testsuite/g++.dg/ext/vector32a.C

This test is the same as the other one.  Did you mean to use
  typedef int V __attribute__((vector_size (N * sizeof (int))));
  V v;
instead or something similar (where the attribute would live on
the type rather than on the FIELD_DECL?

	Jakub