File: wrapper_never_used.cpp

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halide 21.0.0-4
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#include "Halide.h"

using namespace Halide;
using namespace Halide::Internal;

int main() {
    Var x("x"), y("y");
    Func f("f"), g("g"), h("h");
    f(x, y) = x + y;
    g(x, y) = 5;
    h(x, y) = f(x, y) + g(x, y);

    f.compute_root();
    f.in(g).compute_root();

    // This should cause an error since f.in(g) was called but 'f' is
    // never used in 'g'.
    h.realize({5, 5});

    printf("Success!\n");
    return 0;
}