[X86] PMULLD latency wrong in skylake scheduler model

[topperc]

Bugzilla Link	36808
Resolution	FIXED
Resolved on	Mar 20, 2018 16:40
Version	trunk
OS	Windows NT
Blocks	#31672
CC	@RKSimon

Extended Description

skylake client and server scheduler models show a latency of 8. Haswell/Broadwell have 10. Agner's tables, Intel® Xeon® Scalable Processor throughput latency doc, and the llvm-exegesis data show 10 for skylake.

[topperc]

Fixed in r328061