[TextAPI] Add error code for invalid input formats (#71824)

llvm/include/llvm/TextAPI/TextAPIError.h

@@ -21,6 +21,7 @@ enum class TextAPIErrorCode {
   NoSuchArchitecture,
   EmptyResults,
   GenericFrontendError,
+  InvalidInputFormat
 };
 
 class TextAPIError : public llvm::ErrorInfo<TextAPIError> {

llvm/lib/TextAPI/TextAPIError.cpp

@@ -23,6 +23,9 @@ void TextAPIError::log(raw_ostream &OS) const {
   case TextAPIErrorCode::NoSuchArchitecture:
     OS << "no such architecture\n";
     return;
+  case TextAPIErrorCode::InvalidInputFormat:
+    OS << "invalid input format\n";
+    return;
   default:
     llvm_unreachable("unhandled TextAPIErrorCode");
   }