[CIR] Add diagnostic for NYI AST visitor handlers

A couple of handlers that were missing from the CIRGenerator AST visitor
allowed important features to be silently ignored during CIR generation.
This change adds these handlers with diagnostics to report that they are
not yet handled (except in the case where only debug information is
missed).

Author: andykaylor

clang/include/clang/CIR/CIRGenerator.h

@@ -79,7 +79,10 @@ class CIRGenerator : public clang::ASTConsumer {
   void HandleTranslationUnit(clang::ASTContext &astContext) override;
   void HandleInlineFunctionDefinition(clang::FunctionDecl *d) override;
   void HandleTagDeclDefinition(clang::TagDecl *d) override;
+  void HandleTagDeclRequiredDefinition(const clang::TagDecl *D) override;
+  void HandleCXXStaticMemberVarInstantiation(clang::VarDecl *D) override;
   void CompleteTentativeDefinition(clang::VarDecl *d) override;
+  void HandleVTable(clang::CXXRecordDecl *rd) override;
 
   mlir::ModuleOp getModule() const;
   mlir::MLIRContext &getMLIRContext() { return *mlirContext; };

clang/lib/CIR/CodeGen/CIRGenerator.cpp

@@ -152,9 +152,30 @@ void CIRGenerator::HandleTagDeclDefinition(TagDecl *d) {
     cgm->errorNYI(d->getSourceRange(), "HandleTagDeclDefinition: OpenMP");
 }
 
+void CIRGenerator::HandleTagDeclRequiredDefinition(const TagDecl *D) {
+  if (diags.hasErrorOccurred())
+    return;
+
+  assert(!cir::MissingFeatures::generateDebugInfo());
+}
+
+void CIRGenerator::HandleCXXStaticMemberVarInstantiation(VarDecl *D) {
+  if (diags.hasErrorOccurred())
+    return;
+
+  cgm->errorNYI(D->getSourceRange(), "HandleCXXStaticMemberVarInstantiation");
+}
+
 void CIRGenerator::CompleteTentativeDefinition(VarDecl *d) {
   if (diags.hasErrorOccurred())
     return;
 
   cgm->emitTentativeDefinition(d);
 }
+
+void CIRGenerator::HandleVTable(CXXRecordDecl *rd) {
+  if (diags.hasErrorOccurred())
+    return;
+
+  cgm->errorNYI(rd->getSourceRange(), "HandleVTable");
+}