Looks like there is a bug (in GOMP_target lowering? or in
gomp_map_vars_existing?)
The reproducer:
#define N 1000
void foo ()
{
int *a = malloc (N * sizeof (int));
printf ("1: %p\n", a);
#pragma omp target data map(tofrom: a[0:N])
{
printf ("2: %p\n", a);
#pragma omp target
{
int i;
for (i = 0; i < N; i++)
a[i] = i;
}
printf ("3: %p\n", a);
}
printf ("4: %p\n", a);
free (a);
}
Here GOMP_target believes that the pointer 'a' has a type TOFROM, so
it sets copy_from to true for the existing mapping of the pointer 'a',
that was mapped in GOMP_target_data. Therefore the output is
incorrect:
1: [host addr]
2: [host addr]
3: [host addr]
4: [target addr]
-- Ilya
