[backend] supported if

test/10_test.sy

@@ -6,9 +6,9 @@ int main() {
   int c;
   
   if (a == b)
-    c = a + b;
+    c = b - a + 20; // 21 <- this
   else
-    c = a * b + b;
+    c = a * b + b + b + 10; // 16
   
   return c;
 }

test/11_add2.sy

@@ -7,7 +7,7 @@ int mul(int x, int y) {
 int main(){
     int a, b;
     a = 10;
-    b = 0;
-    a = mul(a, b);
-    return a + b;
+    b = 3;
+    a = mul(a, b); //60
+    return a + b; //66
 }