void TableGenBackend::anchor() { }
-void TableGenBackend::EmitSourceFileHeader(const std::string &Desc,
+void TableGenBackend::EmitSourceFileHeader(StringRef Desc,
raw_ostream &OS) const {
OS << "//===- TableGen'erated file -------------------------------------*-"
" C++ -*-===//\n//\n// " << Desc << "\n//\n// Automatically generate"