Initial commit from sysy-main

testdata/functional/44_stmt_expr.sy

@@ -0,0 +1,13 @@
+int k;
+const int n = 10;
+int main () {
+	int i = 0;
+	k = 1;
+	while (i <= n - 1) {
+		i = i + 1;
+		k + 1;
+		k = k + k;
+	}
+	putint(k);
+	return k;
+}