if len(cgoExport) > 0 && fn.ABIRefs&^obj.ABISetOf(fn.ABI) != 0 {
			base.Fatalf("cgo exported function %v cannot have ABI wrappers", fn)
		}

		if !buildcfg.Experiment.RegabiWrappers {
			continue
		}

		forEachWrapperABI(fn, makeABIWrapper)
	}
}

func forEachWrapperABI(fn *ir.Func, cb func(fn *ir.Func, wrapperABI obj.ABI)) {
	need := fn.ABIRefs &^ obj.ABISetOf(fn.ABI)
	if need == 0 {
		return
	}

	// potentially be called using.
	ABISetCallable ABISet = (1 << ABI0) | (1 << ABIInternal)
)

// Ensure ABISet is big enough to hold all ABIs.
var _ ABISet = 1 << (ABICount - 1)

func ABISetOf(abi ABI) ABISet {
	return 1 << abi
}

func (a *ABISet) Set(abi ABI, value bool) {
	if value {
		*a |= 1 << abi
	} else {
		*a &^= 1 << abi
	}
}

func (a *ABISet) Get(abi ABI) bool {