[clang] [clang][fmv] Drop .ifunc from target_version's entrypoint's mangling (PR #81194)

[via cfe-commits]

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@@ -4393,7 +4394,7 @@ llvm::Constant *CodeGenModule::GetOrCreateMultiVersionResolver(GlobalDecl GD) {
   // a separate resolver).
   std::string ResolverName = MangledName;
   if (getTarget().supportsIFunc()) {
-    if (!FD->isTargetClonesMultiVersion())
+    if (!FD->isTargetClonesMultiVersion() && !FD->isTargetVersionMultiVersion())
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elizabethandrews wrote:

I didn't realize there were multiple attributes still using this mangling. A switch would make this code better but I'm ok either way. 

https://github.com/llvm/llvm-project/pull/81194