[clang] [llvm] [NFC][clang][FMV][TargetInfo] Refactor API for FMV feature priority. (PR #116257)

[Phoebe Wang via cfe-commits]

================
@@ -4303,21 +4288,15 @@ void CodeGenModule::emitMultiVersionFunctions() {
                 continue;
 
               llvm::Function *Func = createFunction(CurFD, I);
-              StringRef Architecture;
               Feats.clear();
-              if (getTarget().getTriple().isAArch64())
-                TC->getFeatures(Feats, I);
-              else if (getTarget().getTriple().isRISCV()) {
-                StringRef Version = TC->getFeatureStr(I);
-                Feats.push_back(Version);
+              if (getTarget().getTriple().isX86()) {
+                TC->getAddedFeatures(Feats, I);
----------------
phoebewang wrote:

Do you mean in the first case, `I` actually points to `arch=sandybridge,default,sse4.2` rather than `arch=sandybridge`? If it is true, I think that's something we need to pre-process in general instead of specialize to X86. X86 just needs to handle `Architecture` here.

https://github.com/llvm/llvm-project/pull/116257