[PATCH] D144776: [X86][MC] Early bail out in emitREXPrefix, NFCI

[Phoebe Wang via Phabricator via llvm-commits]

pengfei added inline comments.


================
Comment at: llvm/lib/Target/X86/MCTargetDesc/X86MCCodeEmitter.cpp:1193
   }
+  if (!HasRegOp) {
+    PrefixKind Kind = Prefix.determineOptimalKind();
----------------
You intend to `!NumOps || !HasRegOp`?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D144776/new/

https://reviews.llvm.org/D144776