modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/compile/pr44063.c (about)

     1  typedef signed char int8_t;
     2  typedef short int16_t;
     3  typedef unsigned char uint8_t;
     4  typedef unsigned int uint32_t;
     5  
     6  union unaligned_32 {uint32_t l;} __attribute__((packed)) __attribute__((may_alias));
     7  static inline uint32_t NEG_USR32(uint32_t a, int8_t s){return a << (32 - s);}
     8  typedef struct GetBitContext { const uint8_t *buffer, *buffer_end; int index;}GetBitContext;
     9  typedef struct VLC {int16_t (*table)[2];} VLC;
    10  static __attribute__((always_inline)) inline int get_vlc2(GetBitContext *s, int16_t (*table)[2], int bits, int max_depth) {
    11      unsigned int re_index= (s)->index;
    12      int re_cache= 0;
    13      {
    14          int n, nb_bits;
    15          unsigned int index;
    16          index= NEG_USR32(re_cache, bits);
    17          n = table[index][1];
    18          if(max_depth > 1 && n < 0){
    19              re_cache= bswap_32((((const union unaligned_32 *) (((const uint8_t *)(s)->buffer)+(re_index>>3)))->l)) << (re_index&0x07);
    20          }
    21      }
    22  }
    23  typedef struct HYuvContext{GetBitContext gb; int decorrelate; int bitstream_bpp; uint8_t *temp[3]; VLC vlc[6];} HYuvContext;
    24  static __attribute__((always_inline)) inline void decode_bgr_1(HYuvContext *s, int count, int decorrelate, int alpha){
    25      int i;
    26          int code = get_vlc2(&s->gb, s->vlc[3].table, 11, 1);
    27          if(code != -1){
    28              s->temp[0][4*i+0] = get_vlc2(&s->gb, s->vlc[0].table, 11, 3);
    29              s->temp[0][4*i+1] = get_vlc2(&s->gb, s->vlc[1].table, 11, 3);
    30              s->temp[0][4*i+2] = get_vlc2(&s->gb, s->vlc[2].table, 11, 3);
    31          }
    32  }
    33  void decode_bgr_bitstream(HYuvContext *s, int count){
    34      if(s->decorrelate){
    35          if(s->bitstream_bpp==24) decode_bgr_1(s, count, 1, 0);
    36          else             decode_bgr_1(s, count, 1, 1);
    37      }
    38  }