gcc/testsuite/gcc.c-torture/execute/builtins/memchr.c

   1 /* Copyright (C) 2007  Free Software Foundation.
   2
   3    Ensure all expected transformations of builtin memchr occur
   4    and perform correctly.
   5
   6    Written by Paolo Carlini, 10/5/2007.  */
   7
   8 extern void abort (void);
   9 typedef __SIZE_TYPE__ size_t;
  10 extern void *memchr (const void *, int, size_t);
  11
  12 void
  13 main_test (void)
  14 {
  15   const char* const foo1 = "hello world";
  16
  17   if (memchr (foo1, 'x', 11))
  18     abort ();
  19   if (memchr (foo1, 'o', 11) != foo1 + 4)
  20     abort ();
  21   if (memchr (foo1, 'w', 2))
  22     abort ();
  23   if (memchr (foo1 + 5, 'o', 6) != foo1 + 7)
  24     abort ();
  25   if (memchr (foo1, 'd', 11) != foo1 + 10)
  26     abort ();
  27   if (memchr (foo1, 'd', 10))
  28     abort ();
  29   if (memchr (foo1, '\0', 11))
  30     abort ();
  31   if (memchr (foo1, '\0', 12) != foo1 + 11)
  32     abort ();
  33
  34   /* Test at least one instance of the __builtin_ style.  We do this
  35      to ensure that it works and that the prototype is correct.  */
  36   if (__builtin_memchr (foo1, 'r', 11) != foo1 + 8)
  37     abort ();
  38 }