1  /* Copyright (C) 2001  Free Software Foundation.
       2  
       3     Ensure that short builtin memcmp are optimized and perform correctly.
       4     On architectures with a cmpstrsi instruction, this test doesn't determine
       5     which optimization is being performed, but it does check for correctness.
       6  
       7     Written by Roger Sayle, 12/02/2001.
       8     Additional tests by Roger Sayle after PR 3508, 12/26/2001.  */
       9  
      10  extern void abort (void);
      11  typedef __SIZE_TYPE__ size_t;
      12  extern int memcmp (const void *, const void *, size_t);
      13  extern char *strcpy (char *, const char *);
      14  extern void link_error (void);
      15  
      16  void
      17  main_test (void)
      18  {
      19    char str[8];
      20  
      21    strcpy (str, "3141");
      22  
      23    if ( memcmp (str, str+2, 0) != 0 )
      24      abort ();
      25    if ( memcmp (str+1, str+3, 0) != 0 )
      26      abort ();
      27  
      28    if ( memcmp (str+1, str+3, 1) != 0 )
      29      abort ();
      30    if ( memcmp (str, str+2, 1) >= 0 )
      31      abort ();
      32    if ( memcmp (str+2, str, 1) <= 0 )
      33      abort ();
      34  
      35    if (memcmp ("abcd", "efgh", 4) >= 0)
      36      link_error ();
      37    if (memcmp ("abcd", "abcd", 4) != 0)
      38      link_error ();
      39    if (memcmp ("efgh", "abcd", 4) <= 0)
      40      link_error ();
      41  }