(n.(*ir.UnaryExpr).X.Op() == ir.OBYTES2STR || n.(*ir.UnaryExpr).X.Op() == ir.OBYTES2STRTMP)
}

// isChanLenCap reports whether n is of the form len(c) or cap(c) for a channel c.
// Note that this does not check for -n or instrumenting because this
// is a correctness rewrite, not an optimization.
func isChanLenCap(n ir.Node) bool {
	return (n.Op() == ir.OLEN || n.Op() == ir.OCAP) && n.(*ir.UnaryExpr).X.Type().IsChan()