[gomp4.5] Handle #pragma omp declare target link

[Thomas Schwinge]

Hi!

On Mon, 14 Dec 2015 20:17:33 +0300, Ilya Verbin <iverbin@gmail.com> wrote:
> Here is an updated patch [for "#pragma omp declare target link"]

..., that got committed long ago (trunk r231655), with additional changes
later on.

As has later been filed in PR81689, the test case added
"libgomp.c/target-link-1.c fails for nvptx: #pragma omp target link not
implemented".  Curious, has anybody ever looked into what's going
on/wrong?


Grüße
 Thomas


> --- /dev/null
> +++ b/libgomp/testsuite/libgomp.c/target-link-1.c
> @@ -0,0 +1,63 @@
> +struct S { int s, t; };
> +
> +int a = 1, b = 1;
> +double c[27];
> +struct S d = { 8888, 8888 };
> +#pragma omp declare target link (a) to (b) link (c, d)
> +
> +int
> +foo (void)
> +{
> +  return a++ + b++;
> +}
> +
> +int
> +bar (int n)
> +{
> +  int *p1 = &a;
> +  int *p2 = &b;
> +  c[n] += 2.0;
> +  d.s -= 2;
> +  d.t -= 2;
> +  return *p1 + *p2 + d.s + d.t;
> +}
> +
> +#pragma omp declare target (foo, bar)
> +
> +int
> +main ()
> +{
> +  a = b = 2;
> +  d.s = 17;
> +  d.t = 18;
> +
> +  int res, n = 10;
> +  #pragma omp target map (to: a, b, c, d) map (from: res)
> +  {
> +    res = foo () + foo ();
> +    c[n] = 3.0;
> +    res += bar (n);
> +  }
> +
> +  int shared_mem = 0;
> +  #pragma omp target map (alloc: shared_mem)
> +    shared_mem = 1;
> +
> +  if ((shared_mem && res != (2 + 2) + (3 + 3) + (4 + 4 + 15 + 16))
> +      || (!shared_mem && res != (2 + 1) + (3 + 2) + (4 + 3 + 15 + 16)))
> +    __builtin_abort ();
> +
> +  #pragma omp target enter data map (to: c)
> +  #pragma omp target update from (c)
> +  res = (int) (c[n] + 0.5);
> +  if ((shared_mem && res != 5) || (!shared_mem && res != 0))
> +    __builtin_abort ();
> +
> +  #pragma omp target map (to: a, b) map (from: res)
> +    res = foo ();
> +
> +  if ((shared_mem && res != 4 + 4) || (!shared_mem && res != 2 + 3))
> +    __builtin_abort ();
> +
> +  return 0;
> +}
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