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From: "burnus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/100059] [OpenMP] wrong code with 'declare target
 link' and a scalar variable
Date: Tue, 13 Apr 2021 14:11:00 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100059

--- Comment #3 from Tobias Burnus <burnus at gcc dot gnu.org> ---
With GCN it does work:
 i=3D5: A=3D5, B=3D6, C=3D7
 i=3D5: A=3D6, B=3D8, C=3D10
 i=3D5: A=3D7, B=3D10, C=3D13

And the follow testcase prints:
* with nvptx:
  42, 5, 0, 0
* with amdgcn:
  5, 42, 43, 44

This something must be reversed ...
//-----------------------------------------------
int i =3D 0, a[3];

void update () {=20
  i =3D 5; a[0] =3D 42; a[1] =3D 43; a[2] =3D 44;
}

#pragma omp declare target link(i,a)
#pragma omp declare target to(update)=20=20

int main () {
  #pragma omp target map(from: i, a)
    update();
__builtin_printf("%d, %d, %d, %d\n", i,a[0],a[1],a[2]);
  return 0;
}=