[backend] incorrect asm output

test/01_add.sy

@@ -1,12 +1,8 @@
 //test add
 
-
 int main(){
     int a, b;
-    float d;
     a = 10;
     b = 2;
-    int c = a;
-    d = 1.1 ;
-    return a + b + c;
+    return a + b;
 } 

test/10_test.sy

@@ -8,7 +8,7 @@ int main() {
   if (a == b)
     c = a + b;
   else
-    c = a * b;
+    c = a * b + b;
   
   return c;
 }