[PATCH] D75203: [X86] Relax existing instructions to reduce the number of nops needed for alignment purposes

[Philip Reames via Phabricator via llvm-commits]

reames updated this revision to Diff 248004.
reames added a comment.

Add command line options to selectively disable.  This is to ease performance regression triage post commit.

I think this is ready to land.  I'm just waiting on an LGTM.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D75203/new/

https://reviews.llvm.org/D75203

Files:
  llvm/lib/Target/X86/MCTargetDesc/X86AsmBackend.cpp
  llvm/test/MC/X86/align-branch-64.s
  llvm/test/MC/X86/align-via-relaxation.s

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