AMSTERDAM, June 11 (Reuters) - Elon Musk is expected to appear virtually at an event by computer chip equipment giant ASML on Thursday to discuss Terafab, his plan for a massive chipmaking plant to supply Tesla and IPO-bound SpaceX. The pricing of the initial public offering of Musk's SpaceX, potentially the largest ever, is expected later on Thursday. "Musk will share his vision on AI, robotics, space, and semiconductor manufacturing," an ASML spokesperson said in a statement.