How to handling input arrays (external memories)

void test_input_array(int a[4], int n) {
for (int i = 0; i < 4; i++) {
a[i] = a[i] + 5;
}
}

gives

Generating IR...
UNIMPLEMENTED: For loop missing #pragma
--> ./test_input_array.cpp:2:3
|
2 | for (int i = 0; i < 4; i++) {
| ^