Extracted some test cases from SolidityEndToEnd.cpp

test/libsolidity/semanticTests/structs/packed_storage_structs_delete.sol

@@ -0,0 +1,27 @@
+contract C {
+    struct str { uint8 a; uint16 b; uint8 c; }
+    uint8 x;
+    uint16 y;
+    str data;
+    function test() public returns (uint) {
+        x = 1;
+        y = 2;
+        data.a = 2;
+        data.b = 0xabcd;
+        data.c = 0xfa;
+        if (x != 1 || y != 2 || data.a != 2 || data.b != 0xabcd || data.c != 0xfa)
+            return 2;
+        delete y;
+        delete data.b;
+        if (x != 1 || y != 0 || data.a != 2 || data.b != 0 || data.c != 0xfa)
+            return 3;
+        delete x;
+        delete data;
+        return 1;
+    }
+}
+// ====
+// compileViaYul: also
+// ----
+// test() -> 1
+// storageEmpty -> 1