47 lines
905 B
C
47 lines
905 B
C
/* PR middle-end/55430 */
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/* { dg-do run { target mmap } } */
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/* { dg-options "-O2" } */
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#include <stddef.h>
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#include <stdio.h>
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#include <sys/mman.h>
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#ifndef MAP_ANONYMOUS
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#define MAP_ANONYMOUS MAP_ANON
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#endif
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#ifndef MAP_ANON
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#define MAP_ANON 0
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#endif
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#ifndef MAP_FAILED
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#define MAP_FAILED ((void *)-1)
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#endif
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#include <stdlib.h>
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struct S
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{
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unsigned int s1 : 8;
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unsigned int s2 : 2;
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};
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__attribute__((noinline, noclone)) int
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foo (int x, int y, struct S *z, unsigned int w)
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{
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if (z[y].s2 == x && z[y].s1 == w)
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return 1;
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return 0;
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}
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int
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main ()
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{
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char *p = mmap (NULL, 131072, PROT_READ | PROT_WRITE,
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MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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if (p == MAP_FAILED)
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return 0;
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if (munmap (p + 65536, 65536) < 0)
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return 0;
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if ((65536 / sizeof (struct S)) * sizeof (struct S) != 65536)
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return 0;
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struct S *s = (struct S *) (p + 65536);
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return foo (0, 0, s - 1, 0) != 1;
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}
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