// Phase 286 P3.1: Pattern2 "break without update" minimal fixture
//
// Purpose: Test Pattern2 where break path has NO carrier update
// Expected output: 11
//
// Structure:
//   i = 0, sum = 10        // non-zero init to clarify intent
//   loop(i < 3) {
//       if (i == 1) { break }   // NO sum update before break!
//       sum = sum + 1           // i==0 only: sum = 11
//       i = i + 1
//   }
//   return sum              // expects 11 (value at break point)
//
// Key insight (after_bb PHI):
//   - break path: carrier_break = carrier_current (no update)
//   - natural exit: carrier_out = carrier_current (from header)
//   - after_bb PHI: carrier_out = PHI(header: carrier_current, break_then: carrier_break)
//
// This fixture tests the case where carrier_break == carrier_current
// (i.e., no intermediate update before break)

static box Main {
    main() {
        local i, sum
        i = 0
        sum = 10
        loop(i < 3) {
            if (i == 1) { break }
            sum = sum + 1
            i = i + 1
        }
        return sum
    }
}