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#include "Halide.h"
#include <stdio.h>
using namespace Halide;
int my_trace(JITUserContext *user_context, const halide_trace_event_t *e) {
if (e->event == 2) { // begin realization
if (e->coordinates[1] != 4) {
printf("Realization of f was supposed to be 4-wide\n");
exit(1);
}
}
return 0;
}
int main(int argc, char **argv) {
Func f("f"), g("g"), h("h");
Var x;
// One pixel of this is needed.
f(x) = x;
f.compute_root();
// One pixel of this is needed, but four will be computed, loading
// four values from f(x), so the allocation of f(x) had better be
// 4-wide.
g(x) = f(x) + 1;
g.compute_root().vectorize(x, 4);
// One pixel of this is needed.
h(x) = g(x) + 2;
h.output_buffer().dim(0).set_bounds(0, 1);
f.trace_realizations();
h.jit_handlers().custom_trace = &my_trace;
h.realize({1});
printf("Success!\n");
return 0;
}
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