gcc/testsuite/gcc.dg/torture/pr53120.c

   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 }