blob: d12ca524d5368e15e32497b3a740fc89cbbd5715 [file] [log] [blame]
/* Test whether strncmp has not been "optimized" into memcmp
nor any code with memcmp semantics. */
/* APPLE LOCAL begin 4229621 mainline */
/* { dg-do run { target i?86-*-linux* x86_64-*-linux* ia64-*-linux* alpha*-*-linux* powerpc*-*-linux* s390*-*-linux* sparc*-*-linux* *-*-darwin* } } */
/* { dg-options "-O2" } */
#include <sys/mman.h>
#ifndef MAP_ANONYMOUS
#define MAP_ANONYMOUS MAP_ANON
#endif
/* APPLE LOCAL end 4229621 mainline */
#include <stdlib.h>
void __attribute__((noinline)) test (const char *p)
{
if (__builtin_strncmp (p, "abcdefghijklmnopq", 17) == 0)
abort ();
}
int main (void)
{
char *p = mmap (NULL, 131072, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (p == MAP_FAILED)
return 0;
if (munmap (p + 65536, 65536) < 0)
return 0;
__builtin_memcpy (p + 65536 - 5, "abcd", 5);
test (p + 65536 - 5);
return 0;
}