[PATCH] D19189: Expose the list of available features in MCSubtargetInfo

[Johan Engelen via llvm-commits]

johanengelen added a comment.

I don't know how I missed "ToggleFeature", thanks very much for pointing me in that direction!
With the current interface, I think I can already do what I want:

  auto *mcinfo = gTargetMachine->getMCSubtargetInfo();
  auto SavedFeatbits = mcinfo->getFeatureBits();
  auto NewFeatbits = mcinfo->ApplyFeatureFlag("feature to query");
  bool FeatureFound = (SavedFeatbits == NewFeatbits);
  mcinfo->setFeatureBits(SavedFeatbits);

Do you think it still makes sense to add a `bool MCSubtargetInfo::QueryFeatureFlag(StringRef FS)` ?


http://reviews.llvm.org/D19189