5.2.1.6 #pragma may_not_point_to (pointer, variable [, variable]…)

This pragma specifies that at the point of any dereference of the named pointer variable, the pointer value being dereferenced does not point to the objects that are contained in any of the named variables. This pragma overrides all other applied alias levels. In the following example, the compiler assumes that any indirect access of *p does not alias the direct accesses a, b, or c.

#pragma may_not_point_to(p, a, b, c)