[clang] [RISCV][FMV] Support target_version (PR #99040)

[Philip Reames via cfe-commits]

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@@ -11027,13 +11029,27 @@ static bool CheckMultiVersionValue(Sema &S, const FunctionDecl *FD) {
   }
 
   if (TVA) {
-    llvm::SmallVector<StringRef, 8> Feats;
-    TVA->getFeatures(Feats);
-    for (const auto &Feat : Feats) {
-      if (!TargetInfo.validateCpuSupports(Feat)) {
-        S.Diag(FD->getLocation(), diag::err_bad_multiversion_option)
-            << Feature << Feat;
-        return true;
+    if (S.getASTContext().getTargetInfo().getTriple().isRISCV()) {
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preames wrote:

The need to version all of this by target is unfortunate.  Is there a way we can reduce the duplication here?

https://github.com/llvm/llvm-project/pull/99040