Subversion Repositories openrisc

/* Test whether strncmp has not been "optimized" into memcmp

   nor any code with memcmp semantics.  */

/* { dg-do run { target i?86-*-linux* x86_64-*-linux* ia64-*-linux* alpha*-*-linux* powerpc*-*-linux* s390*-*-linux* sparc*-*-linux* i?86-*-darwin* powerpc-*-darwin*} } */

/* { dg-options "-O2" } */

#include <stddef.h>

#include <stdio.h>

#include <sys/mman.h>

/* Darwin spells this differently */

#ifndef MAP_ANONYMOUS

#define MAP_ANONYMOUS MAP_ANON

#endif

#include <stdlib.h>

    struct Flags {

 int filler[18];

 unsigned int a:14;

 unsigned int b:14;

 unsigned int c:1;

 unsigned int d:1;

 unsigned int e:1;

 unsigned int f:1;

    };

static void __attribute__((noinline)) set (struct Flags *);

static void set (struct Flags *fp)

{

  fp->b = 5;

  fp->d = 1;

}

static int __attribute__((noinline)) bar (int);

static int bar(int x) { return !(x==1); }

int main (void)

{

  char *p = mmap (NULL, 131072, PROT_READ | PROT_WRITE,

                  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);

  struct Flags *fp;

  if (p == MAP_FAILED)

    return 0;

  if (munmap (p + 65536, 65536) < 0)

    return 0;

  fp = (struct Flags*)(p + 65536 - sizeof(struct Flags));

  set(fp);

  if (fp->b > 0)

    return (bar(fp->d));

  return 1;

}