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/* { dg-additional-options "-Wopenacc-parallelism" } for testing/documenting
aspects of that functionality. */
#include <assert.h>
/* Test of reduction on parallel directive. */
#define ACTUAL_GANGS 256
int
main (int argc, char *argv[])
{
int res, res1 = 0, res2 = 0;
#if defined(ACC_DEVICE_TYPE_host)
# define GANGS 1
#else
# define GANGS 256
#endif
#pragma acc parallel num_gangs(GANGS) num_workers(32) vector_length(32) \
reduction(+:res1) copy(res2, res1)
/* { dg-bogus "warning: region is gang partitioned but does not contain gang partitioned code" "TODO 'reduction', 'atomic'" { xfail { ! openacc_host_selected } } .-2 } */
/* { dg-warning "region is worker partitioned but does not contain worker partitioned code" "" { target *-*-* } .-3 } */
/* { dg-warning "region is vector partitioned but does not contain vector partitioned code" "" { target *-*-* } .-4 } */
{
res1 += 5;
#pragma acc atomic
res2 += 5;
}
res = GANGS * 5;
assert (res == res1);
assert (res == res2);
#undef GANGS
res = res1 = res2 = 1;
#if defined(ACC_DEVICE_TYPE_host)
# define GANGS 1
#else
# define GANGS 8
#endif
#pragma acc parallel num_gangs(GANGS) num_workers(32) vector_length(32) \
reduction(*:res1) copy(res1, res2)
/* { dg-bogus "warning: region is gang partitioned but does not contain gang partitioned code" "TODO 'reduction', 'atomic'" { xfail { ! openacc_host_selected } } .-2 } */
/* { dg-warning "region is worker partitioned but does not contain worker partitioned code" "" { target *-*-* } .-3 } */
/* { dg-warning "region is vector partitioned but does not contain vector partitioned code" "" { target *-*-* } .-4 } */
{
res1 *= 5;
#pragma acc atomic
res2 *= 5;
}
for (int i = 0; i < GANGS; ++i)
res *= 5;
assert (res == res1);
assert (res == res2);
#undef GANGS
return 0;
}
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