[clang] [clang-cl] Fix value of __FUNCTION__ in MSVC mode. (PR #84014)

[Aaron Ballman via cfe-commits]

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@@ -855,7 +868,17 @@ void DeclPrinter::VisitFunctionDecl(FunctionDecl *D) {
         Out << Proto << " -> ";
         Proto.clear();
       }
-      AFT->getReturnType().print(Out, Policy, Proto);
+      if (!Policy.SuppressTagKeyword && Policy.SuppressScope &&
+          !Policy.SuppressUnwrittenScope) {
+        AddPrefix(Policy, AFT->getReturnType(), Out);
+        bool OldTagKeyword = Policy.SuppressTagKeyword;
+        bool OldSupressScope = Policy.SuppressScope;
+        AFT->getReturnType().print(Out, Policy, Proto);
+        Policy.SuppressTagKeyword = OldTagKeyword;
+        Policy.SuppressScope = OldSupressScope;
----------------
AaronBallman wrote:

This is only necessary because of the changes you made in TypePrinter.cpp, right? e.g., if we reset the policy back to its original values there, we don't need to do it here.

https://github.com/llvm/llvm-project/pull/84014