修复IR函数参数输出，变量命名

src/SysYIRPrinter.cpp

@@ -128,12 +128,15 @@ void SysYPrinter::printFunction(Function *function) {
   std::cout << " @" << function->getName() << "(";
   
   auto entryBlock = function->getEntryBlock();
+  const auto &args_types = function->getParamTypes();
   auto &args = entryBlock->getArguments();
   
-  for (size_t i = 0; i < args.size(); i++) {
+  int i = 0;
+  for (const auto &args_type : args_types) {
     if (i > 0) std::cout << ", ";
-    printType(args[i]->getType());
+    printType(args_type);
     std::cout << " %" << args[i]->getName();
+    i++;
   }
   
   std::cout << ") {" << std::endl;