Initial commit from sysy-main

test/20_test_licm_sr.sy

@@ -0,0 +1,20 @@
+//test file for loop-invariant code motion (licm) and strength reduction (sr is optional)
+
+int main(){
+    const int a = 1;
+    const int b = 2;
+    int c, d, f;
+
+    int i = 0;
+    while(i < 100){
+        c = a + b;
+        d = c * 2;
+
+        if(i > 50){
+            f = i * d;
+        }
+        i++;
+    }
+
+    return f;
+}