[PATCH] D41721: [X86] Move HasNOPL to a subtarget feature bit. Plumb MCSubtargetInfo through the MCAsmBackend constructor

Simon Pilgrim via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Thu Jan 4 05:48:23 PST 2018

RKSimon added a comment.

Nice, I was half way through doing this myself....

PR22965 needs addressing as well - instead of driving off the silvermont feature bit - do we need a 'PreferNop15' feature bit for AMD (fam15/fam16/ryzen) and possibly recent Intel (???) targets and otherwise use 11 byte NOPs?


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