func (s *state) Debug_checknil() bool                                { return s.f.Frontend().Debug_checknil() }

func ssaMarker(name string) *ir.Name {
	return ir.NewNameAt(base.Pos, &types.Sym{Name: name}, nil)
}

var (
	// marker node for the memory variable
	memVar = ssaMarker("mem")

	// marker nodes for temporary variables
	ptrVar       = ssaMarker("ptr")