[clang] [llvm] Split fmv and extensions (PR #92882)

[Alexandros Lamprineas via cfe-commits]

================
@@ -13664,16 +13665,23 @@ QualType ASTContext::getCorrespondingSignedFixedPointType(QualType Ty) const {
   }
 }
 
+// Given a list of FMV features, add each of their backend features to the list.
+static void
+GetFMVBackendFeaturesFor(const llvm::SmallVector<StringRef, 8> FMVFeatStrings,
----------------
labrinea wrote:

pass by reference?

https://github.com/llvm/llvm-project/pull/92882