}

var ptr unsafe.Pointer

func StorePointer() {
	var x int // ERROR "moved to heap: x"
	atomic.StorePointer(&ptr, unsafe.Pointer(&x))
}

func SwapPointer() {
	var x int // ERROR "moved to heap: x"
	atomic.SwapPointer(&ptr, unsafe.Pointer(&x))
}

func CompareAndSwapPointer() {
	// BAD: x doesn't need to be heap allocated
	var x int // ERROR "moved to heap: x"
	var y int // ERROR "moved to heap: y"

}

//go:linkname sync_atomic_SwapUintptr sync/atomic.SwapUintptr
func sync_atomic_SwapUintptr(ptr *uintptr, new uintptr) uintptr

//go:linkname sync_atomic_SwapPointer sync/atomic.SwapPointer
//go:nosplit
func sync_atomic_SwapPointer(ptr *unsafe.Pointer, new unsafe.Pointer) unsafe.Pointer {
	if writeBarrier.enabled {
		atomicwb(ptr, new)
	}
	if goexperiment.CgoCheck2 {
		cgoCheckPtrWrite(ptr, new)

		if typ != np.typ {
			panic("sync/atomic: swap of inconsistently typed value into Value")
		}
		op := (*efaceWords)(unsafe.Pointer(&old))
		op.typ, op.data = np.typ, SwapPointer(&vp.data, np.data)
		return old
	}
}

// CompareAndSwap executes the compare-and-swap operation for the [Value].
//
// All calls to CompareAndSwap for a given Value must use values of the same

func (x *Pointer[T]) Store(val *T) { StorePointer(&x.v, unsafe.Pointer(val)) }

// Swap atomically stores new into x and returns the previous value.
func (x *Pointer[T]) Swap(new *T) (old *T) { return (*T)(SwapPointer(&x.v, unsafe.Pointer(new))) }

// CompareAndSwap executes the compare-and-swap operation for x.
func (x *Pointer[T]) CompareAndSwap(old, new *T) (swapped bool) {