diff --git a/out.ll b/out.ll
deleted file mode 100644
index f9ddd4a..0000000
--- a/out.ll
+++ /dev/null
@@ -1,40 +0,0 @@
-declare i32 @getint()
-declare i32 @getch()
-declare i32 @getarray(i32*)
-declare void @putint(i32)
-declare void @putch(i32)
-declare void @putarray(i32, i32*)
-declare void @puts(i32*)
-declare void @_sysy_starttime(i32)
-declare void @_sysy_stoptime(i32)
-declare void @starttime()
-declare void @stoptime()
-declare float @getfloat()
-declare void @putfloat(float)
-declare i32 @getfarray(float*)
-declare void @putfarray(i32, float*)
-declare i32* @memset(i32*, i32, i32)
-declare i32* @sysy_alloc_i32(i32)
-declare float* @sysy_alloc_f32(i32)
-declare void @sysy_free_i32(i32*)
-declare void @sysy_free_f32(float*)
-declare void @sysy_zero_i32(i32*, i32)
-declare void @sysy_zero_f32(float*, i32)
-define i32 @main() {
-entry:
-  %t0.retval = alloca i32
-  %t1_x = alloca i32
-  store i32 0, i32* %t1_x
-  %t5 = load i32, i32* %t1_x
-  %t6 = icmp eq i32 %t5, 0
-  br i1 %t6, label %then.t2, label %else.t3
-then.t2:
-  store i32 5, i32* %t1_x
-  br label %merge.t4
-else.t3:
-  store i32 7, i32* %t1_x
-  br label %merge.t4
-merge.t4:
-  %t7 = load i32, i32* %t1_x
-  ret i32 %t7
-}
diff --git a/out.s b/out.s
deleted file mode 100644
index e69de29..0000000
diff --git a/test/test_case/mem2reg/01_phi.out b/test/test_case/mem2reg/01_phi.out
deleted file mode 100644
index 7ed6ff8..0000000
--- a/test/test_case/mem2reg/01_phi.out
+++ /dev/null
@@ -1 +0,0 @@
-5
diff --git a/test/test_case/mem2reg/01_phi.sy b/test/test_case/mem2reg/01_phi.sy
deleted file mode 100644
index aa9db2b..0000000
--- a/test/test_case/mem2reg/01_phi.sy
+++ /dev/null
@@ -1,9 +0,0 @@
-int main() {
-  int x = 0;
-  if (x == 0) {
-    x = 5;
-  } else {
-    x = 7;
-  }
-  return x;
-}