github.com/prattmic/llgo-embedded@v0.0.0-20150820070356-41cfecea0e1e/third_party/gofrontend/libffi/testsuite/libffi.call/cls_9byte1.c (about)

     1  /* Area:	ffi_call, closure_call
     2     Purpose:	Check structure passing with different structure size.
     3  		Depending on the ABI. Darwin/AIX do double-word
     4  		alignment of the struct if the first element is a double.
     5  		Check that it does not here.
     6     Limitations:	none.
     7     PR:		none.
     8     Originator:	<andreast@gcc.gnu.org> 20030914	 */
     9  
    10  /* { dg-do run } */
    11  #include "ffitest.h"
    12  
    13  typedef struct cls_struct_9byte {
    14    int a;
    15    double b;
    16  } cls_struct_9byte;
    17  
    18  cls_struct_9byte cls_struct_9byte_fn(struct cls_struct_9byte b1,
    19  			    struct cls_struct_9byte b2)
    20  {
    21    struct cls_struct_9byte result;
    22  
    23    result.a = b1.a + b2.a;
    24    result.b = b1.b + b2.b;
    25  
    26    printf("%d %g %d %g: %d %g\n", b1.a, b1.b,  b2.a, b2.b,
    27  	 result.a, result.b);
    28  
    29    return result;
    30  }
    31  
    32  static void cls_struct_9byte_gn(ffi_cif* cif __UNUSED__, void* resp,
    33  				void** args, void* userdata __UNUSED__)
    34  {
    35    struct cls_struct_9byte b1, b2;
    36  
    37    b1 = *(struct cls_struct_9byte*)(args[0]);
    38    b2 = *(struct cls_struct_9byte*)(args[1]);
    39  
    40    *(cls_struct_9byte*)resp = cls_struct_9byte_fn(b1, b2);
    41  }
    42  
    43  int main (void)
    44  {
    45    ffi_cif cif;
    46    void *code;
    47    ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
    48    void* args_dbl[3];
    49    ffi_type* cls_struct_fields[3];
    50    ffi_type cls_struct_type;
    51    ffi_type* dbl_arg_types[3];
    52  
    53    struct cls_struct_9byte h_dbl = { 7, 8.0};
    54    struct cls_struct_9byte j_dbl = { 1, 9.0};
    55    struct cls_struct_9byte res_dbl;
    56  
    57    cls_struct_type.size = 0;
    58    cls_struct_type.alignment = 0;
    59    cls_struct_type.type = FFI_TYPE_STRUCT;
    60    cls_struct_type.elements = cls_struct_fields;
    61  
    62    cls_struct_fields[0] = &ffi_type_sint;
    63    cls_struct_fields[1] = &ffi_type_double;
    64    cls_struct_fields[2] = NULL;
    65  
    66    dbl_arg_types[0] = &cls_struct_type;
    67    dbl_arg_types[1] = &cls_struct_type;
    68    dbl_arg_types[2] = NULL;
    69  
    70    CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &cls_struct_type,
    71  		     dbl_arg_types) == FFI_OK);
    72  
    73    args_dbl[0] = &h_dbl;
    74    args_dbl[1] = &j_dbl;
    75    args_dbl[2] = NULL;
    76  
    77    ffi_call(&cif, FFI_FN(cls_struct_9byte_fn), &res_dbl, args_dbl);
    78    /* { dg-output "7 8 1 9: 8 17" } */
    79    printf("res: %d %g\n", res_dbl.a, res_dbl.b);
    80    /* { dg-output "\nres: 8 17" } */
    81  
    82    CHECK(ffi_prep_closure_loc(pcl, &cif, cls_struct_9byte_gn, NULL, code) == FFI_OK);
    83  
    84    res_dbl = ((cls_struct_9byte(*)(cls_struct_9byte, cls_struct_9byte))(code))(h_dbl, j_dbl);
    85    /* { dg-output "\n7 8 1 9: 8 17" } */
    86    printf("res: %d %g\n", res_dbl.a, res_dbl.b);
    87    /* { dg-output "\nres: 8 17" } */
    88  
    89    exit(0);
    90  }