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#include <assert.h>
/* Test of reduction on both parallel and loop directives (workers and vectors
together in gang-partitioned mode, float type). */
int
main (int argc, char *argv[])
{
int i, j;
float arr[32768];
float res = 0, hres = 0;
for (i = 0; i < 32768; i++)
arr[i] = i % (32768 / 64);
#pragma acc parallel num_gangs(32) num_workers(32) vector_length(32) \
reduction(+:res) copy(res)
{
#pragma acc loop gang /* { dg-warning "nested loop in reduction needs reduction clause for 'res'" "TODO" } */
for (j = 0; j < 32; j++)
{
#pragma acc loop worker vector reduction(+:res)
for (i = 0; i < 1024; i++)
res += arr[j * 1024 + i];
#pragma acc loop worker vector reduction(+:res)
for (i = 0; i < 1024; i++)
res += arr[j * 1024 + (1023 - i)];
}
}
for (j = 0; j < 32; j++)
for (i = 0; i < 1024; i++)
{
hres += arr[j * 1024 + i];
hres += arr[j * 1024 + (1023 - i)];
}
assert (hres <= 16777216);
assert (res == hres);
return 0;
}
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