// Phase 212: Pattern 3 (IfPHI) test - if-sum implementation
// Tests: Loop with conditional update inside if block
// Target: selfhost if-sum pattern (e.g., FuncScannerBox._sum_def_count)
//
// Expected behavior:
//   Simulated array [null-equivalent, "a", "b"] → sum counts non-empty strings
//   i=0 → skip, i=1,2 → count
//
// Expected result: RC=2 (count of valid items)

static box Main {
    sum_def_count(defs) {
        local sum
        sum = 0
        local i
        i = 0
        local len
        len = 3

        loop(i < len) {
            // Simulate: [empty, "a", "b"]
            //   i=0 → empty (skip)
            //   i=1 → "a" (count)
            //   i=2 → "b" (count)

            if i > 0 {
                // Conditional update: sum = sum + 1
                sum = sum + 1
            } else {
                // Else branch (do nothing)
                sum = sum + 0
            }

            i = i + 1
        }

        return sum
    }

    main(args) {
        // Simulated array [empty, "a", "b"] → sum=2
        local result
        result = Main.sum_def_count(0)  // dummy arg
        return result
    }
}