Unnecessary to_string

Author: sinkuu

src/librustc_codegen_llvm/back/symbol_export.rs

@@ -206,9 +206,8 @@ fn exported_symbols_provider_local<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
                                  })
                                  .collect();
 
-    if let Some(_) = *tcx.sess.entry_fn.borrow() {
-        let symbol_name = "main".to_string();
-        let exported_symbol = ExportedSymbol::NoDefId(SymbolName::new(&symbol_name));
+    if tcx.sess.entry_fn.borrow().is_some() {
+        let exported_symbol = ExportedSymbol::NoDefId(SymbolName::new("main"));
 
         symbols.push((exported_symbol, SymbolExportLevel::C));
     }