diff --git a/src/SysYFIRBuilder/IRBuilder.cpp b/src/SysYFIRBuilder/IRBuilder.cpp
index 9861dda..d47d589 100644
--- a/src/SysYFIRBuilder/IRBuilder.cpp
+++ b/src/SysYFIRBuilder/IRBuilder.cpp
@@ -20,6 +20,18 @@ size_t Ifnum = 0;
 
 Ptr<AllocaInst> retAlloca;
 SysYF::Ptr<SysYF::IR::BasicBlock> retbb;
+
+/* enum Condtype
+{
+    equal,
+    greater,
+    less,
+    ge,
+    le,
+    notequal
+
+}condtype_; */
+SysYF::Ptr<SysYF::IR::CmpInst> _cmp;
 // store temporary value
 Ptr<Value> tmp_val = nullptr;
 // types
@@ -272,8 +284,22 @@ void IRBuilder::visit(SyntaxTree::IfStmt &node) {
     bbAfter = BasicBlock::create(module, s + num, ParentFunc);
 
     node.cond_exp->accept(*this);
-    auto CondType = tmp_val->get_type();
-    
+    if(node.else_statement)
+        builder->create_cond_br(_cmp, bbTrue, bbFalse);
+    else
+        builder->create_cond_br(_cmp, bbTrue, bbAfter);
+
+    builder->set_insert_point(bbTrue);
+    node.if_statement->accept(*this);
+    builder->create_br(bbAfter);
+
+    if(node.else_statement){
+        builder->set_insert_point(bbTrue);
+        node.else_statement->accept(*this);
+        builder->create_br(bbAfter);
+    }
+
+    builder->set_insert_point(bbAfter);
 }
 
 void IRBuilder::visit(SyntaxTree::WhileStmt &node) {}