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#include "Halide.h"
#include <stdio.h>
using namespace Halide;
int count = 0;
int my_trace(JITUserContext *user_context, const halide_trace_event_t *ev) {
if (ev->event == halide_trace_load) {
count++;
}
return 0;
}
int main(int argc, char **argv) {
Func f;
Var x, y;
Func in;
in(x, y) = x + y;
in.compute_root();
// Set f to zero
f(x, y) = 0;
// Then iterate over a circle, adding in(x, y) to f.
Expr t = cast<int>(ceil(sqrt(max(0, 10 * 10 - y * y))));
f(x, y) += select(x > -t && x < t, in(x, y), 0);
in.trace_loads();
f.jit_handlers().custom_trace = my_trace;
f.realize({20, 20});
int c = 0;
for (int y = 0; y < 20; y++) {
for (int x = 0; x < 20; x++) {
if (x * x + y * y < 10 * 10) c++;
}
}
if (count != c) {
printf("Func 'in' should only have been loaded from at points "
"within the circle x*x + y*y < 10*10. It was loaded %d "
"times, but there are %d points within that circle\n",
count, c);
return 1;
}
printf("Success!\n");
return 0;
}
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