1  /* { dg-do compile } */
       2  /* { dg-options "-fno-tree-sra" } */
       3  typedef struct {
       4    unsigned int en : 1;
       5    unsigned int bit_order : 1;
       6    unsigned int scl_io : 1;
       7    unsigned int scl_inv : 1;
       8    unsigned int sda0_io : 1;
       9    unsigned int sda0_idle : 1;
      10    unsigned int sda1_io : 1;
      11    unsigned int sda1_idle : 1;
      12    unsigned int sda2_io : 1;
      13    unsigned int sda2_idle : 1;
      14    unsigned int sda3_io : 1;
      15    unsigned int sda3_idle : 1;
      16    unsigned int sda_sel : 2;
      17    unsigned int sen_idle : 1;
      18    unsigned int sen_inv : 1;
      19    unsigned int sen_sel : 2;
      20    unsigned int dummy1 : 14;
      21  } reg_gio_rw_i2c1_cfg;
      22  
      23  typedef struct {
      24    unsigned int data0 : 8;
      25    unsigned int data1 : 8;
      26    unsigned int data2 : 8;
      27    unsigned int data3 : 8;
      28  } reg_gio_rw_i2c1_data;
      29  
      30  typedef struct {
      31    unsigned int trf_bits : 6;
      32    unsigned int switch_dir : 6;
      33    unsigned int extra_start : 3;
      34    unsigned int early_end : 1;
      35    unsigned int start_stop : 1;
      36    unsigned int ack_dir0 : 1;
      37    unsigned int ack_dir1 : 1;
      38    unsigned int ack_dir2 : 1;
      39    unsigned int ack_dir3 : 1;
      40    unsigned int ack_dir4 : 1;
      41    unsigned int ack_dir5 : 1;
      42    unsigned int ack_bit : 1;
      43    unsigned int start_bit : 1;
      44    unsigned int freq : 2;
      45    unsigned int dummy1 : 5;
      46  } reg_gio_rw_i2c1_ctrl;
      47  
      48  extern reg_gio_rw_i2c1_cfg reg_gio;
      49  extern reg_gio_rw_i2c1_data reg_data;
      50  extern int reg_start;
      51  extern reg_gio_rw_i2c1_ctrl reg_ctrl;
      52  
      53  extern void foobar(void);
      54  extern void foo(int);
      55  extern void frob(unsigned int);
      56  extern void bar(int);
      57  extern void baz(void);
      58  
      59  unsigned int f(int *devspec, unsigned int addr)
      60  {
      61   reg_gio_rw_i2c1_ctrl ctrl = {0};
      62   reg_gio_rw_i2c1_data data = {0};
      63  
      64   foobar();
      65  
      66   static int first = 1;
      67  
      68   if (first) {
      69    reg_gio_rw_i2c1_cfg cfg = {0};
      70    first = 0;
      71  
      72    foo(1);
      73    cfg.sda0_idle = 1;
      74    cfg.sda0_io = 0;
      75    cfg.scl_inv = 0;
      76    cfg.scl_io = 0;
      77    cfg.bit_order = 1;
      78    cfg.sda_sel = 0;
      79    cfg.sen_sel = 0;
      80    cfg.en = 1;
      81    reg_gio = cfg;
      82   }
      83  
      84   ctrl.freq = 1;
      85   ctrl.start_bit = 0;
      86   ctrl.ack_bit = 1;
      87   ctrl.ack_dir0 = 0;
      88   ctrl.ack_dir1 = 0;
      89   ctrl.ack_dir2 = 0;
      90   ctrl.ack_dir3 = 1;
      91   ctrl.ack_dir4 = 0;
      92   ctrl.ack_dir5 = 0;
      93   ctrl.start_stop = 1;
      94   ctrl.early_end = 0;
      95   ctrl.extra_start = 2;
      96   ctrl.switch_dir = 8*3;
      97   ctrl.trf_bits = 8*4;
      98   reg_ctrl = ctrl;
      99   frob(0xac);
     100   data.data0 = devspec[1] & 192;
     101   data.data1 = addr;
     102   data.data2 = devspec[1] | 0x01;
     103   reg_data = data;
     104   reg_start = 1;
     105   bar(100);
     106   data = reg_data;
     107   baz();
     108  
     109   return data.data3;
     110  }