| Argyrios Kyrtzidis | c4d2c90 | 2011-02-28 19:49:42 +0000 | [diff] [blame] | 1 | // RUN: %clang_cc1 -analyze -analyzer-checker=core -analyzer-store=region -analyzer-constraints=range -verify -Wno-unreachable-code -ffreestanding %s |
| Ted Kremenek | b8e26e6 | 2008-06-19 17:55:38 +0000 | [diff] [blame] | 2 | |
| Ted Kremenek | 39a1884 | 2008-06-21 17:20:55 +0000 | [diff] [blame] | 3 | #include <stdint.h> |
| Ted Kremenek | b8e26e6 | 2008-06-19 17:55:38 +0000 | [diff] [blame] | 4 | |
| Mike Stump | fd28a61 | 2009-07-21 18:44:24 +0000 | [diff] [blame] | 5 | void f1(int * p) { |
| Ted Kremenek | b8e26e6 | 2008-06-19 17:55:38 +0000 | [diff] [blame] | 6 | |
| 7 | // This branch should be infeasible |
| 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 | } |