It wasn't too long ago—perhaps even 5 to 10 years ago—that EDA and IP cores made strange bedfellows. If you've been in the industry for a few years, you remember those days (think "star IP" for one thing).
Well, times change quickly in our industry. Today, IP cores are a fundamental part of EDA and design methodologies. Just a few short years ago, Cadence's IP business was minimal or nonexistent. Today, Cadence is the number 4 provider of IP cores in the global electronics design world.