ACCEPT_PERMIT doesn't allow optimization of loops with loop exits

[billzorn]

In the example, neither loop can be perforated, despite the annotations. Is this expected?

On a related note, it would be very helpful if accept told you where the loop exit was, the same way it tells you what line an assignment to a precise value or an impure function call is.

#include <assert.h>
#include <enerc.h>

int main() {

  APPROX int x_approx = 0;

  for (int i = 0; i < 1000; ++i) {
    assert(x_approx <= 2000); // ACCEPT_PERMIT
    x_approx += 1;
  }

  for (int i = 0; i < 1000; ++i) {
    if (i > 557) // ACCEPT_PERMIT
      break; // ACCEPT_PERMIT
    x_approx += 1;
  }

  return ENDORSE(x_approx);
}