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96100
2017 Nov 09
2
RFC: [X86] Introducing command line options to prefer narrower vector instructions even when wider instructions are available
I agree that a less x86 specific command line makes sense. I've been having
an internal discussions with gcc folks and their evaluating switching to
something like -mprefer-vector-width=128/256/512/none
Based on the current performance data we're seeing, we think we need to
ultimately default skylake-avx512 to -mprefer-vector-width=256. If we go
with a target independent