Subversion Repositories openrisc

/* Copyright (C) 2000, 2001, 2003, 2004  Free Software Foundation.

   Ensure all expected transformations of builtin strlen

   occur and perform correctly.

   Written by Jakub Jelinek, 11/7/2000.

   Additional tests written by Roger Sayle, 11/02/2001:

   Ensure all builtin strlen comparisons against zero are optimized

   and perform correctly. The multiple calls to strcpy are to prevent

   the potentially "pure" strlen calls from being removed by CSE.

   Modified by Ben Elliston, 2006-10-25:

   The multiple calls to strcpy that Roger mentions above are

   problematic on systems where strcpy is implemented using strlen

   (which this test overrides to call abort).  So, rather than use

   strcpy, we perform the identical operations using array indexing

   and char assignments.  */

extern void abort (void);

extern __SIZE_TYPE__ strlen (const char *);

extern char *strcpy (char *, const char *);

int x = 6;

void

main_test(void)

{

  const char *const foo = "hello world";

  char str[8];

  char *ptr;

  if (strlen (foo) != 11)

    abort ();

  if (strlen (foo + 4) != 7)

    abort ();

  if (strlen (foo + (x++ & 7)) != 5)

    abort ();

  if (x != 7)

    abort ();

  ptr = str;

  ptr[0] = 'n'; ptr[1] = 't'; ptr[2] = 's'; ptr[3] = '\0';

  if (strlen (ptr) == 0)

    abort ();

  ptr[0] = 'n'; ptr[1] = 't'; ptr[2] = 's'; ptr[3] = '\0';

  if (strlen (ptr) < 1)

    abort ();

  ptr[0] = 'n'; ptr[1] = 't'; ptr[2] = 's'; ptr[3] = '\0';

  if (strlen (ptr) <= 0)

    abort ();

  ptr[0] = 'n'; ptr[1] = 't'; ptr[2] = 's'; ptr[3] = '\0';

  if (strlen (ptr+3) != 0)

    abort ();

  ptr[0] = 'n'; ptr[1] = 't'; ptr[2] = 's'; ptr[3] = '\0';

  if (strlen (ptr+3) > 0)

    abort ();

  ptr[0] = 'n'; ptr[1] = 't'; ptr[2] = 's'; ptr[3] = '\0';

  if (strlen (str+3) >= 1)

    abort ();

  /* Test at least one instance of the __builtin_ style.  We do this

     to ensure that it works and that the prototype is correct.  */

  if (__builtin_strlen (foo) != 11)

    abort ();

}