Store value to pointer, with optional guaranteed alignment:
            *ptr = name

def store(self, value, ptr, align=None):
        """
        Store value to pointer, with optional guaranteed alignment:
            *ptr = name
        """
        if not isinstance(ptr.type, types.PointerType):
            raise TypeError("cannot store to value of type %s (%r): not a pointer"
                            % (ptr.type, str(ptr)))
        if ptr.type.pointee != value.type:
            raise TypeError("cannot store %s to %s: mismatching types"
                            % (value.type, ptr.type))
        st = instructions.StoreInstr(self.block, value, ptr)
        st.align = align
        self._insert(st)
        return st