[clang] Upstream enum support (PR #136807)

[Bruno Cardoso Lopes via cfe-commits]

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@@ -617,6 +617,9 @@ void CIRGenModule::emitTopLevelDecl(Decl *decl) {
   case Decl::OpenACCDeclare:
     emitGlobalOpenACCDecl(cast<OpenACCDeclareDecl>(decl));
     break;
+  case Decl::Enum:
+    assert(!cir::MissingFeatures::generateDebugInfo() && "NYI");
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bcardosolopes wrote:

`assert(!cir::MissingFeatures::generateDebugInfo())` should be enough here.

https://github.com/llvm/llvm-project/pull/136807