diff --git a/include/naivebackend/build_layout.hpp b/include/naivebackend/build_layout.hpp
index 2982fdc..6be2efd 100644
--- a/include/naivebackend/build_layout.hpp
+++ b/include/naivebackend/build_layout.hpp
@@ -32,7 +32,7 @@ inline void ScanForVar(FuncLayout &layout, std::shared_ptr<ActionItem> action,
       throw std::runtime_error("GetElementPtrAction should have a result_full");
     }
     if (get_element_act->indices.size() == 1) {
-      layout.AllocateItem(get_element_act->result_full, CalcSize(get_element_act->ty));
+      layout.AllocateItem(get_element_act->result_full, 4);
     } else if (get_element_act->indices.size() == 2) {
       if (get_element_act->indices[0] != "0")
         throw std::runtime_error("GetElementPtrAction with non-zero base index is not supported");
diff --git a/include/naivebackend/codegen.hpp b/include/naivebackend/codegen.hpp
index 0e63a57..574b878 100644
--- a/include/naivebackend/codegen.hpp
+++ b/include/naivebackend/codegen.hpp
@@ -88,7 +88,7 @@ inline void GenerateASM(std::shared_ptr<ActionItem> act, std::vector<std::string
       size_t element_sz = CalcSize(get_element_act->ty);
       code_lines.push_back("slli t1, t1, " + std::to_string(std::countr_zero(element_sz)));
       code_lines.push_back("add t2, t0, t1");
-      GenerateWriteAccess(get_element_act->result_full, element_sz, "t2", layout, code_lines);
+      GenerateWriteAccess(get_element_act->result_full, 4, "t2", layout, code_lines);
     } else if (get_element_act->indices.size() == 2) {
       // struct access
       if (get_element_act->indices[0] != "0") {
@@ -138,6 +138,8 @@ inline void GenerateASM(std::shared_ptr<ActionItem> act, std::vector<std::string
     if (call_act->args_ty.size() != call_act->args_val_full.size()) {
       throw std::runtime_error("args_ty and args_full_name should have the same size");
     }
+    code_lines.push_back("addi sp, sp, -16");
+    code_lines.push_back("sw a0, 0(sp)");
     for (size_t i = 0; i < num_of_args && i < 8; i++) {
       IRVar2RISCVReg(call_act->args_val_full[i], CalcSize(call_act->args_ty[i]), "a" + std::to_string(i), layout,
                      code_lines);
@@ -160,6 +162,8 @@ inline void GenerateASM(std::shared_ptr<ActionItem> act, std::vector<std::string
       size_t ret_sz = CalcSize(call_act->return_type);
       GenerateWriteAccess(call_act->result_full, ret_sz, "a0", layout, code_lines);
     }
+    code_lines.push_back("lw a0, 0(sp)");
+    code_lines.push_back("addi sp, sp, 16");
   } else if (auto phi_act = std::dynamic_pointer_cast<PhiItem>(act)) {
     if (!process_phi) {
       return;  // for efficiency, phi actions are implemented as store action in the previous block
diff --git a/include/naivebackend/naivebackend.h b/include/naivebackend/naivebackend.h
index d1a0f94..3723554 100644
--- a/include/naivebackend/naivebackend.h
+++ b/include/naivebackend/naivebackend.h
@@ -32,6 +32,8 @@ class RISCVConstStrItem : public RISCVAsmItemBase {
         os << "\\t";
       } else if (c == '\"') {
         os << "\\\"";
+      } else if (c == '\\') {
+        os << "\\\\";
       } else {
         os << c;
       }
diff --git a/src/IR/IRBuilder.cpp b/src/IR/IRBuilder.cpp
index b42c582..724c16c 100644
--- a/src/IR/IRBuilder.cpp
+++ b/src/IR/IRBuilder.cpp
@@ -47,11 +47,11 @@ void IRBuilder::ActuralVisit(FuncDef_ASTNode *node) {
   size_t block_id = block_counter++;
   current_block->label_full = "label_" + std::to_string(block_id);
 
-  if (node->func_name == "main") {
+  if (declare->func_name_raw == "main") {
     func_def->init_block = main_init_block;
   } else {
     func_def->init_block = std::make_shared<BlockItem>();
-    func_def->init_block->label_full = "label_init_" + node->func_name;
+    func_def->init_block->label_full = "label_init_" + declare->func_name_raw;
     for (auto &arg : node->params) {
       std::string &arg_name_raw = arg.first;
       std::string rvalue_full_name = "%.var.local." + std::to_string(scope_id) + "." + arg_name_raw + ".val";