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IIRC, wasn't part of the issue that compile-time instruction scheduling was a poor match with speculative execution and/or hardware-based branch prediction? I.

IIRC, wasn't part of the issue that compile-time instruction scheduling was a poor match with speculative execution and/or hardware-based branch prediction? I.e., the compiler had no access to information that's only revealed at runtime?

duskwuff 1y ago
Yes, absolutely. Itanium was designed with the expectation that memory speed/latency would keep pace with CPUs - it didn't.