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/* Copyright (C) 2003  Free Software Foundation.

   Ensure builtin mempcpy performs correctly.

   Written by Kaveh Ghazi, 4/11/2003.  */

extern void abort (void);

typedef __SIZE_TYPE__ size_t;

extern size_t strlen(const char *);

extern void *memcpy (void *, const void *, size_t);

extern void *mempcpy (void *, const void *, size_t);

extern int memcmp (const void *, const void *, size_t);

extern int inside_main;

const char s1[] = "123";

char p[32] = "";

char *s2 = "defg";

char *s3 = "FGH";

size_t l1 = 1;

void

main_test (void)

{

  int i;

#if !defined __i386__ && !defined __x86_64__

  /* The functions below might not be optimized into direct stores on all

     arches.  It depends on how many instructions would be generated and

     what limits the architecture chooses in STORE_BY_PIECES_P.  */

  inside_main = 0;

#endif

  if (mempcpy (p, "ABCDE", 6) != p + 6 || memcmp (p, "ABCDE", 6))

    abort ();

  if (mempcpy (p + 16, "VWX" + 1, 2) != p + 16 + 2

      || memcmp (p + 16, "WX\0\0", 5))

    abort ();

  if (mempcpy (p + 1, "", 1) != p + 1 + 1 || memcmp (p, "A\0CDE", 6))

    abort ();

  if (mempcpy (p + 3, "FGHI", 4) != p + 3 + 4 || memcmp (p, "A\0CFGHI", 8))

    abort ();

  i = 8;

  memcpy (p + 20, "qrstu", 6);

  memcpy (p + 25, "QRSTU", 6);

  if (mempcpy (p + 25 + 1, s1, 3) != (p + 25 + 1 + 3)

      || memcmp (p + 25, "Q123U", 6))

    abort ();

  if (mempcpy (mempcpy (p, "abcdEFG", 4), "efg", 4) != p + 8

      || memcmp (p, "abcdefg", 8))

    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_mempcpy (p, "ABCDE", 6) != p + 6 || memcmp (p, "ABCDE", 6))

    abort ();

  /* If the result of mempcpy is ignored, gcc should use memcpy.

     This should be optimized always, so set inside_main again.  */

  inside_main = 1;

  mempcpy (p + 5, s3, 1);

  if (memcmp (p, "ABCDEFg", 8))

    abort ();

  mempcpy (p + 6, s1 + 1, l1);

  if (memcmp (p, "ABCDEF2", 8))

    abort ();

}