toolchain/gcc/gcc/testsuite/gcc.c-torture/execute/builtins/string-2.c

   1 /* Copyright (C) 2000, 2003  Free Software Foundation.
   2
   3    Ensure all expected transformations of builtin strchr and index
   4    occur and perform correctly.
   5
   6    Written by Jakub Jelinek, 11/7/2000.  */
   7
   8 extern void abort (void);
   9 extern char *strchr (const char *, int);
  10 extern char *index (const char *, int);
  11
  12 void
  13 main_test (void)
  14 {
  15   const char *const foo = "hello world";
  16
  17   if (strchr (foo, 'x'))
  18     abort ();
  19   if (strchr (foo, 'o') != foo + 4)
  20     abort ();
  21   if (strchr (foo + 5, 'o') != foo + 7)
  22     abort ();
  23   if (strchr (foo, '\0')  != foo + 11)
  24     abort ();
  25   /* Test only one instance of index since the code path is the same
  26      as that of strchr. */
  27   if (index ("hello", 'z')  != 0)
  28     abort ();
  29
  30   /* Test at least one instance of the __builtin_ style.  We do this
  31      to ensure that it works and that the prototype is correct.  */
  32   if (__builtin_strchr (foo, 'o')  != foo + 4)
  33     abort ();
  34   if (__builtin_index (foo, 'o')  != foo + 4)
  35     abort ();
  36 }