diff --git a/src/include/IRBuilder.h b/src/include/IRBuilder.h
index aab9a1d..6df82e7 100644
--- a/src/include/IRBuilder.h
+++ b/src/include/IRBuilder.h
@@ -333,15 +333,11 @@ class IRBuilder {
     block->getInstructions().emplace(position, inst);
     return inst;
   }  ///< 创建store指令
-  PhiInst * createPhiInst(Type *type, Value *lhs, BasicBlock *parent, const std::string &name = "") {
-    auto predNum = parent->getNumPredecessors();
-    std::vector<Value *> rhs;
-    for (size_t i = 0; i < predNum; i++) {
-      rhs.push_back(lhs);
-    }
-    auto inst = new PhiInst(type, lhs, rhs, lhs, parent, name);
+  PhiInst * createPhiInst(Type *type, const std::vector<Value*> &vals = {}, const std::vector<BasicBlock*> &blks = {}, const std::string &name = "") {
+    auto predNum = block->getNumPredecessors();
+    auto inst = new PhiInst(type, vals, blks, block, name);
     assert(inst);
-    parent->getInstructions().emplace(parent->begin(), inst);
+    block->getInstructions().emplace(block->begin(), inst);
     return inst;
   }  ///< 创建Phi指令
 };