Anonymous bit fields in structures cause crashes due to duplicate name fields and supports merging multiple bit fields into one underlying type, such as unsigned int.

[tsingbx]

_structs.txt

1、Supports merging multiple bit fields into one underlying type, such as unsigned int. 2、The ast file should not contain code that the compiler ignores. For example, #ifdef XXX code #endif. The code here should be ignored when XXX is not defined, and the ast file should not contain this code.

[luoliwoshang]

• 刚刚去看了一下Bit field这块，虽然在这里表达看起来是从 invalid 到 pc 共同组成一个unsigned short ，但实际上这几个是分开的，连续的位域定义可以省略前面的类型，所以这里从invalid开始到pc 都是unsigned short 类型的位域，那我们肯定是不能将其合并为同一个底层类型的

• 而中间那个没名字的位置则是用于对齐位置的空域，不能访问，仅用作占位对齐

#define _STRUCT_FP_CONTROL  struct fp_control
_STRUCT_FP_CONTROL
{
    unsigned short      invalid :1,
                    denorm  :1,
                zdiv    :1,
                ovrfl   :1,
                undfl   :1,
                precis  :1,
                    :2,
                pc  :2,
#define FP_PREC_24B     0
#define FP_PREC_53B     2
#define FP_PREC_64B     3
                rc  :2,
#define FP_RND_NEAR     0
#define FP_RND_DOWN     1
#define FP_RND_UP       2
#define FP_CHOP         3
                /*inf*/ :1,
                    :3;
};