[PATCH] D105462: [X86] Add CRC32 feature.

[Wang Tianqing via Phabricator via cfe-commits]

tianqing added inline comments.


================
Comment at: llvm/lib/Target/X86/X86.td:84
                                       "Enable SSE 4.2 instructions",
-                                      [FeatureSSE41]>;
+                                      [FeatureSSE41, FeatureCRC32]>;
 // The MMX subtarget feature is separate from the rest of the SSE features
----------------
craig.topper wrote:
> Doesn't this make -mno-crc32 disable sse4.2? Is that what we want?
> 
> Or should we be doing this like popcnt where we loosely enable it at the end of X86TargetInfo::initFeatureMap
It does. But it's not a big deal in this case. The scenario described in the commit message doesn't require crc32 capable to be disabled separately.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D105462/new/

https://reviews.llvm.org/D105462