This bug was reported in http://lists.gnu.org/archive/html/tinycc-devel/2010-08/msg00050.html In this case, we should not emit any code when we cast from VT_FUNC to VT_PTR.
- Fix a wrong calculation for size of struct - Handle cases where struct size isn't multple of 8 - Recover vstack after memcpy for pushing struct - Add a float parameter for struct_assign_test1 to check SSE alignment