modernc.org/cc@v1.0.1/testdata/gcc-6.3.0/gcc/testsuite/gcc.c-torture/execute/builtins/memops-asm-lib.c (about)

     1  extern void abort (void);
     2  extern int inside_main;
     3  typedef __SIZE_TYPE__ size_t;
     4  
     5  #define TEST_ABORT if (inside_main) abort()
     6  
     7  /* LTO code is at the present to able to track that asm alias my_bcopy on builtin
     8     actually refers to this function.  See PR47181. */
     9  __attribute__ ((used))
    10  void *
    11  my_memcpy (void *d, const void *s, size_t n)
    12  {
    13    char *dst = (char *) d;
    14    const char *src = (const char *) s;
    15    while (n--)
    16      *dst++ = *src++;
    17    return (char *) d;
    18  }
    19  
    20  /* LTO code is at the present to able to track that asm alias my_bcopy on builtin
    21     actually refers to this function.  See PR47181. */
    22  __attribute__ ((used))
    23  void
    24  my_bcopy (const void *s, void *d, size_t n)
    25  {
    26    char *dst = (char *) d;
    27    const char *src = (const char *) s;
    28    if (src >= dst)
    29      while (n--)
    30        *dst++ = *src++;
    31    else
    32      {
    33        dst += n;
    34        src += n;
    35        while (n--)
    36          *--dst = *--src;
    37      }
    38  }
    39  
    40  /* LTO code is at the present to able to track that asm alias my_bcopy on builtin
    41     actually refers to this function.  See PR47181. */
    42  __attribute__ ((used))
    43  void *
    44  my_memset (void *d, int c, size_t n)
    45  {
    46    char *dst = (char *) d;
    47    while (n--)
    48      *dst++ = c;
    49    return (char *) d;
    50  }
    51  
    52  /* LTO code is at the present to able to track that asm alias my_bcopy on builtin
    53     actually refers to this function.  See PR47181. */
    54  __attribute__ ((used))
    55  void
    56  my_bzero (void *d, size_t n)
    57  {
    58    char *dst = (char *) d;
    59    while (n--)
    60      *dst++ = '\0';
    61  }
    62  
    63  void *
    64  memcpy (void *d, const void *s, size_t n)
    65  {
    66    void *result = my_memcpy (d, s, n);
    67    TEST_ABORT;
    68    return result;
    69  }
    70  
    71  void
    72  bcopy (const void *s, void *d, size_t n)
    73  {
    74    my_bcopy (s, d, n);
    75    TEST_ABORT;
    76  }
    77  
    78  void *
    79  memset (void *d, int c, size_t n)
    80  {
    81    void *result = my_memset (d, c, n);
    82    TEST_ABORT;
    83    return result;
    84  }
    85  
    86  void
    87  bzero (void *d, size_t n)
    88  {
    89    my_bzero (d, n);
    90    TEST_ABORT;
    91  }
    92  
    93  #ifdef __vxworks
    94  /* The RTP C library uses bfill, which is defined in the same file as
    95     bzero and bcopy.  */
    96  #include "lib/bfill.c"
    97  #endif