modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/20030408-1.c (about)

     1  /* PR optimization/8634 */
     2  /* Contributed by Glen Nakamura <glen at imodulo dot com> */
     3  
     4  extern void abort (void);
     5  
     6  struct foo {
     7    char a, b, c, d, e, f, g, h, i, j;
     8  };
     9  
    10  int test1 ()
    11  {
    12    const char X[8] = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H' };
    13    char buffer[8];
    14    __builtin_memcpy (buffer, X, 8);
    15    if (buffer[0] != 'A' || buffer[1] != 'B'
    16        || buffer[2] != 'C' || buffer[3] != 'D'
    17        || buffer[4] != 'E' || buffer[5] != 'F'
    18        || buffer[6] != 'G' || buffer[7] != 'H')
    19      abort ();
    20    return 0;
    21  }
    22  
    23  int test2 ()
    24  {
    25    const char X[10] = { 'A', 'B', 'C', 'D', 'E' };
    26    char buffer[10];
    27    __builtin_memcpy (buffer, X, 10);
    28    if (buffer[0] != 'A' || buffer[1] != 'B'
    29        || buffer[2] != 'C' || buffer[3] != 'D'
    30        || buffer[4] != 'E' || buffer[5] != '\0'
    31        || buffer[6] != '\0' || buffer[7] != '\0'
    32        || buffer[8] != '\0' || buffer[9] != '\0')
    33      abort ();
    34    return 0;
    35  }
    36  
    37  int test3 ()
    38  {
    39    const struct foo X = { a : 'A', c : 'C', e : 'E', g : 'G', i : 'I' };
    40    char buffer[10];
    41    __builtin_memcpy (buffer, &X, 10);
    42    if (buffer[0] != 'A' || buffer[1] != '\0'
    43        || buffer[2] != 'C' || buffer[3] != '\0'
    44        || buffer[4] != 'E' || buffer[5] != '\0'
    45        || buffer[6] != 'G' || buffer[7] != '\0'
    46        || buffer[8] != 'I' || buffer[9] != '\0')
    47      abort ();
    48    return 0;
    49  }
    50  
    51  int test4 ()
    52  {
    53    const struct foo X = { .b = 'B', .d = 'D', .f = 'F', .h = 'H' , .j = 'J' };
    54    char buffer[10];
    55    __builtin_memcpy (buffer, &X, 10);
    56    if (buffer[0] != '\0' || buffer[1] != 'B'
    57        || buffer[2] != '\0' || buffer[3] != 'D'
    58        || buffer[4] != '\0' || buffer[5] != 'F'
    59        || buffer[6] != '\0' || buffer[7] != 'H'
    60        || buffer[8] != '\0' || buffer[9] != 'J')
    61      abort ();
    62    return 0;
    63  }
    64  
    65  int main ()
    66  {
    67    test1 (); test2 (); test3 (); test4 ();
    68    return 0;
    69  }