[PATCH] D159250: [X86][RFC] Add new option `-m[no-]evex512` to disable ZMM and 64-bit mask instructions for AVX512 features

[Kan Shengchen via Phabricator via cfe-commits]

skan added inline comments.


================
Comment at: llvm/lib/Target/X86/X86Subtarget.cpp:271
 
+  // Attach EVEX512 feature when we have AVX512 features and EVEX512 is not 
set.
+  size_t posNoEVEX512 = FS.rfind("-evex512");
----------------
It seems the change in X86.cpp is redundant?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D159250/new/

https://reviews.llvm.org/D159250

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