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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [testsuite/] [gcc.dg/] [duff-1.c] - Blame information for rev 298

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Line No. Rev Author Line
1 298 jeremybenn
/* Duff's device is legal C; test to make sure the compiler
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   doesn't complain about it.
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   Jason Thorpe <thorpej@wasabisystems.com>
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   Derived from PR 3846.  */
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/* { dg-do run } */
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/* { dg-options "-O2" } */
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extern void abort (void);
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extern void exit (int);
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typedef __SIZE_TYPE__ size_t;
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extern int memcmp (const void *, const void *, size_t);
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void
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duffcpy (char *dst, const char *src, unsigned long size)
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{
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  switch (size & 3)
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    {
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    for (;;)
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      {
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        *dst++ = *src++;
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    case 3:
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        *dst++ = *src++;
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    case 2:
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        *dst++ = *src++;
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    case 1:
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        *dst++ = *src++;
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    case 0:
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        if (size <= 3)
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          break;
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        size -= 4;
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      }
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    }
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}
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const char testpat[] = "The quick brown fox jumped over the lazy dog.";
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int
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main()
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{
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  char buf[64];
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  duffcpy (buf, testpat, sizeof (testpat));
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  if (memcmp (buf, testpat, sizeof (testpat)) != 0)
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    abort ();
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  exit (0);
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}

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