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

   1 /* Copyright (C) 2000, 2003, 2004  Free Software Foundation.
   2
   3    Ensure all expected transformations of builtin strrchr and rindex
   4    occur and perform correctly.
   5
   6    Written by Jakub Jelinek, 11/7/2000.  */
   7
   8 extern void abort (void);
   9 extern char *strrchr (const char *, int);
  10 extern char *rindex (const char *, int);
  11
  12 char *bar = "hi world";
  13 int x = 7;
  14
  15 void
  16 main_test (void)
  17 {
  18   const char *const foo = "hello world";
  19
  20   if (strrchr (foo, 'x'))
  21     abort ();
  22   if (strrchr (foo, 'o') != foo + 7)
  23     abort ();
  24   if (strrchr (foo, 'e') != foo + 1)
  25     abort ();
  26   if (strrchr (foo + 3, 'e'))
  27     abort ();
  28   if (strrchr (foo, '\0') != foo + 11)
  29     abort ();
  30   if (strrchr (bar, '\0') != bar + 8)
  31     abort ();
  32   if (strrchr (bar + 4, '\0') != bar + 8)
  33     abort ();
  34   if (strrchr (bar + (x++ & 3), '\0') != bar + 8)
  35     abort ();
  36   if (x != 8)
  37     abort ();
  38   /* Test only one instance of rindex since the code path is the same
  39      as that of strrchr. */
  40   if (rindex ("hello", 'z') != 0)
  41     abort ();
  42
  43   /* Test at least one instance of the __builtin_ style.  We do this
  44      to ensure that it works and that the prototype is correct.  */
  45   if (__builtin_strrchr (foo, 'o') != foo + 7)
  46     abort ();
  47   if (__builtin_rindex (foo, 'o') != foo + 7)
  48     abort ();
  49 }