|
111
|
1 /* PR middle-end/55430 */
|
|
|
2 /* { dg-do run { target mmap } } */
|
|
|
3 /* { dg-options "-O2" } */
|
|
|
4
|
|
|
5 #include <stddef.h>
|
|
|
6 #include <stdio.h>
|
|
|
7 #include <sys/mman.h>
|
|
|
8 #ifndef MAP_ANONYMOUS
|
|
|
9 #define MAP_ANONYMOUS MAP_ANON
|
|
|
10 #endif
|
|
|
11 #ifndef MAP_ANON
|
|
|
12 #define MAP_ANON 0
|
|
|
13 #endif
|
|
|
14 #ifndef MAP_FAILED
|
|
|
15 #define MAP_FAILED ((void *)-1)
|
|
|
16 #endif
|
|
|
17 #include <stdlib.h>
|
|
|
18
|
|
|
19 struct S
|
|
|
20 {
|
|
|
21 unsigned int s1 : 8;
|
|
|
22 unsigned int s2 : 2;
|
|
|
23 };
|
|
|
24
|
|
|
25 __attribute__((noinline, noclone)) int
|
|
|
26 foo (int x, int y, struct S *z, unsigned int w)
|
|
|
27 {
|
|
|
28 if (z[y].s2 == x && z[y].s1 == w)
|
|
|
29 return 1;
|
|
|
30 return 0;
|
|
|
31 }
|
|
|
32
|
|
|
33 int
|
|
|
34 main ()
|
|
|
35 {
|
|
|
36 char *p = mmap (NULL, 131072, PROT_READ | PROT_WRITE,
|
|
|
37 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
|
|
|
38 if (p == MAP_FAILED)
|
|
|
39 return 0;
|
|
|
40 if (munmap (p + 65536, 65536) < 0)
|
|
|
41 return 0;
|
|
|
42 if ((65536 / sizeof (struct S)) * sizeof (struct S) != 65536)
|
|
|
43 return 0;
|
|
|
44 struct S *s = (struct S *) (p + 65536);
|
|
|
45 return foo (0, 0, s - 1, 0) != 1;
|
|
|
46 }
|
