complex.c revision 9457a800f1fea4db4bb595c77de277609913b1b3 
1// RUN: clang -analyze -checker-simple -analyzer-store=basic -analyzer-constraints=basic -verify %s &&
2// RUN: clang -analyze -checker-cfref -analyzer-store=basic -analyzer-constraints=basic -verify %s &&
3// RUN: clang -analyze -checker-cfref -analyzer-store=basic -analyzer-constraints=range -verify %s &&
4// RUN: clang -analyze -checker-cfref -analyzer-store=region -analyzer-constraints=basic -verify %s &&
5// RUN: clang -analyze -checker-cfref -analyzer-store=region -analyzer-constraints=range -verify %s
6
7#include <stdint.h>
8
9int f1(int * p) {
10
11  // This branch should be infeasible
12  // because __imag__ p is 0.
13  if (!p && __imag__ (intptr_t) p)
14    *p = 1; // no-warning
15
16  // If p != 0 then this branch is feasible; otherwise it is not.
17  if (__real__ (intptr_t) p)
18    *p = 1; // no-warning
19
20  *p = 2; // expected-warning{{Dereference of null pointer}}
21}
22