IA-64 was not a clean break; it was an enormous bet on compilers getting sufficiently smart by the time the cheap gets out. They didn't. In fact, today's compil

IA-64 was not a clean break; it was an enormous bet on compilers getting sufficiently smart by the time the cheap gets out. They didn't. In fact, today's compilers are still not smart enough to make the IA-64 a reasonable architecture.