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// RUN: %libomptarget-compile-run-and-check-generic
// XFAIL: intelgpu
// This test checks that "update from" clause in OpenMP supports strided
// sections. #pragma omp target update from(result[0:N/2:2]) updates every other
// element from device
#include <omp.h>
#include <stdio.h>
#include <stdlib.h>
#define N 32
int main() {
double *result = (double *)calloc(N, sizeof(double));
printf("initial host array values:\n");
for (int i = 0; i < N; i++)
printf("%f\n", result[i]);
printf("\n");
#pragma omp target data map(to : result[0 : N])
{
#pragma omp target map(alloc : result[0 : N])
for (int i = 0; i < N; i++)
result[i] += i;
// Update strided elements from device: even indices 0,2,4,...,30
#pragma omp target update from(result[0 : 16 : 2])
}
printf("after target update from (even indices up to 30 updated):\n");
for (int i = 0; i < N; i++)
printf("%f\n", result[i]);
printf("\n");
// Expected: even indices i, odd indices 0
// CHECK: after target update from
// CHECK: 0.000000
// CHECK: 0.000000
// CHECK: 2.000000
// CHECK: 0.000000
// CHECK: 4.000000
// CHECK: 0.000000
// CHECK: 6.000000
// CHECK: 0.000000
// CHECK: 8.000000
// CHECK: 0.000000
// CHECK: 10.000000
// CHECK: 0.000000
// CHECK: 12.000000
// CHECK: 0.000000
// CHECK: 14.000000
// CHECK: 0.000000
// CHECK: 16.000000
// CHECK: 0.000000
// CHECK: 18.000000
// CHECK: 0.000000
// CHECK: 20.000000
// CHECK: 0.000000
// CHECK: 22.000000
// CHECK: 0.000000
// CHECK: 24.000000
// CHECK: 0.000000
// CHECK: 26.000000
// CHECK: 0.000000
// CHECK: 28.000000
// CHECK: 0.000000
// CHECK: 30.000000
// CHECK: 0.000000
// CHECK-NOT: 1.000000
// CHECK-NOT: 3.000000
// CHECK-NOT: 31.000000
free(result);
return 0;
}
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