modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/pr40493.c (about)

     1  extern void abort (void);
     2  
     3  typedef union i386_operand_type
     4  {
     5    struct
     6      {
     7        unsigned int reg8:1;
     8        unsigned int reg16:1;
     9        unsigned int reg32:1;
    10        unsigned int reg64:1;
    11        unsigned int floatreg:1;
    12        unsigned int regmmx:1;
    13        unsigned int regxmm:1;
    14        unsigned int regymm:1;
    15        unsigned int control:1;
    16        unsigned int debug:1;
    17        unsigned int test:1;
    18        unsigned int sreg2:1;
    19        unsigned int sreg3:1;
    20        unsigned int imm1:1;
    21        unsigned int imm8:1;
    22        unsigned int imm8s:1;
    23        unsigned int imm16:1;
    24        unsigned int imm32:1;
    25        unsigned int imm32s:1;
    26        unsigned int imm64:1;
    27        unsigned int disp8:1;
    28        unsigned int disp16:1;
    29        unsigned int disp32:1;
    30        unsigned int disp32s:1;
    31        unsigned int disp64:1;
    32        unsigned int acc:1;
    33        unsigned int floatacc:1;
    34        unsigned int baseindex:1;
    35        unsigned int inoutportreg:1;
    36        unsigned int shiftcount:1;
    37        unsigned int jumpabsolute:1;
    38        unsigned int esseg:1;
    39        unsigned int regmem:1;
    40        unsigned int mem:1;
    41        unsigned int byte:1;
    42        unsigned int word:1;
    43        unsigned int dword:1;
    44        unsigned int fword:1;
    45        unsigned int qword:1;
    46        unsigned int tbyte:1;
    47        unsigned int xmmword:1;
    48        unsigned int ymmword:1;
    49        unsigned int unspecified:1;
    50        unsigned int anysize:1;
    51      } bitfield;
    52    unsigned int array[2];
    53  } i386_operand_type;
    54  
    55  unsigned int x00, x01, y00, y01;
    56  
    57  int main (int argc, char *argv[])
    58  {
    59    i386_operand_type a,b,c,d;
    60  
    61    a.bitfield.reg16 = 1;
    62    a.bitfield.imm16 = 0;
    63    a.array[1] = 22;
    64  
    65    b = a;
    66    x00 = b.array[0];
    67    x01 = b.array[1];
    68  
    69    c = b;
    70    y00 = c.array[0];
    71    y01 = c.array[1];
    72  
    73    d = c;
    74    if (d.bitfield.reg16 != 1)
    75      abort();
    76    if (d.bitfield.imm16 != 0)
    77      abort();
    78    if (d.array[1] != 22)
    79      abort();
    80  
    81    return 0;
    82  }