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b723d5a625
Noticed while trying to use llvm-exegesis to get some accurate capture numbers on some old Atom/Silverment hardware as part of the work with D103695. These targets' frontends are particularly poor and the use of the xmm8-xmm15 SSE registers results in longer instruction encodings which were affecting the latency/throughput estimates. Thanks to @lebedev.ri for the --skip-measurements command line argument which made testing much easier! Differential Revision: https://reviews.llvm.org/D138832
