Minimal JIT compiled example

Here's the simplest JIT-compiled program that does something interesting:

#include <Halide.h>
#include <stdio.h>

int main(int argc, char **argv) {
  // Define a gradient function.
  Halide::Func f;
  Halide::Var x, y;
  f(x, y) = x + y;

  // JIT-compile and evaluate it.
  Halide::Image<int> result = f.realize(32, 32);

  // Print the result.
  for (int y = 0; y < result.height(); y++) {
      for (int x = 0; x < result.width(); x++) {
          printf("%3d ", result(x, y));
      }
      printf("\n");
  }

  return 0;
}

The tutorials cover many more examples of JIT-compilation.

For further, more complex examples, you may wish to peruse the correctness tests.