// Stream B1 (fibers) — an `abi(.naked)` function with PARAMETERS reads its args
// from ABI registers (the shape the fiber context-switch needs: `swap_context`
// reads `from`/`to` from x0/x1).
//
// A naked function has no frame, so params are NOT spilled to stack slots — they
// stay in their ABI registers and the asm body reads them directly. Here `a` is
// in x0, `b` in x1 (aarch64 AAPCS), and the result returns in x0: `add x0, x0,
// x1`. The lowering skips the param-alloca loop for `.naked` (decl.zig /
// generic.zig); the LLVM args are declared-but-unused, which the verifier allows
// (spilling them would emit `store i64 %0, …` → "cannot use argument of naked
// function"). aarch64-pinned; runs end-to-end (exit 42), ir-only on a mismatch.
//
// Regression for an adversarial-review finding: before the param-alloca guard, a
// param-bearing `.naked` fn emitted invalid LLVM (loud verifier error) instead of
// a working naked function.
add :: (a: i64, b: i64) -> i64 abi(.naked) {
    asm volatile {
        #string A
        add x0, x0, x1
        ret
A
    };
}

main :: () -> i64 { return add(40, 2); }