1  /* Copyright (C) 2004  Free Software Foundation.
       2  
       3     Ensure builtin strcpy is optimized into memcpy
       4     even when there is more than one possible string literal
       5     passed to it, but all string literals passed to it
       6     have equal length.
       7  
       8     Written by Jakub Jelinek, 9/15/2004.  */
       9  
      10  extern void abort (void);
      11  extern char *strcpy (char *, const char *);
      12  typedef __SIZE_TYPE__ size_t;
      13  extern void *memcpy (void *, const void *, size_t);
      14  extern int memcmp (const void *, const void *, size_t);
      15  
      16  char buf[32], *p;
      17  int i;
      18  
      19  char *
      20  __attribute__((noinline))
      21  test (void)
      22  {
      23    int j;
      24    const char *q = "abcdefg";
      25    for (j = 0; j < 3; ++j)
      26      {
      27        if (j == i)
      28          q = "bcdefgh";
      29        else if (j == i + 1)
      30          q = "cdefghi";
      31        else if (j == i + 2)
      32          q = "defghij";
      33      }
      34    p = strcpy (buf, q);
      35    return strcpy (buf + 16, q);
      36  }
      37  
      38  void
      39  main_test (void)
      40  {
      41  #ifndef __OPTIMIZE_SIZE__
      42    /* For -Os, strcpy above is not replaced with
      43       memcpy (buf, q, 8);, as that is larger.  */
      44    if (test () != buf + 16 || p != buf)
      45      abort ();
      46  #endif
      47  }