1 // RUN: %clang_analyze_cc1 -analyzer-checker=core -analyzer-store=region -verify -Wno-unreachable-code -ffreestanding %s
2 
3 #include <stdint.h>
4 
5 void f1(int * p) {
6 
7   // This branch should be infeasible
caller()8   // because __imag__ p is 0.
9   if (!p && __imag__ (intptr_t) p)
10     *p = 1; // no-warning
11 
12   // If p != 0 then this branch is feasible; otherwise it is not.
13   if (__real__ (intptr_t) p)
14     *p = 1; // no-warning
15 
16   *p = 2; // expected-warning{{Dereference of null pointer}}
17 }
18