old-autovect-branch/gcc/testsuite/gcc.c-torture/execute/builtin-prefetch-3.c

   1 /* Test that __builtin_prefetch does no harm.
   2
   3    Prefetch data using a variety of storage classes and address
   4    expressions with volatile variables and pointers.  */
   5
   6 int glob_int_arr[100];
   7 int glob_int = 4;
   8 volatile int glob_vol_int_arr[100];
   9 int * volatile glob_vol_ptr_int = glob_int_arr;
  10 volatile int *glob_ptr_vol_int = glob_vol_int_arr;
  11 volatile int * volatile glob_vol_ptr_vol_int = glob_vol_int_arr;
  12 volatile int glob_vol_int;
  13
  14 static stat_int_arr[100];
  15 static volatile int stat_vol_int_arr[100];
  16 static int * volatile stat_vol_ptr_int = stat_int_arr;
  17 static volatile int *stat_ptr_vol_int = stat_vol_int_arr;
  18 static volatile int * volatile stat_vol_ptr_vol_int = stat_vol_int_arr;
  19 static volatile int stat_vol_int;
  20
  21 struct S {
  22   int a;
  23   short b, c;
  24   char d[8];
  25   struct S *next;
  26 };
  27
  28 struct S str;
  29 volatile struct S vol_str;
  30 struct S * volatile vol_ptr_str = &str;
  31 volatile struct S *ptr_vol_str = &vol_str;
  32 volatile struct S * volatile vol_ptr_vol_str = &vol_str;
  33
  34 /* Prefetch volatile global variables using the address of the variable.  */
  35
  36 void
  37 simple_vol_global ()
  38 {
  39   __builtin_prefetch (glob_vol_int_arr, 0, 0);
  40   __builtin_prefetch (glob_vol_ptr_int, 0, 0);
  41   __builtin_prefetch (glob_ptr_vol_int, 0, 0);
  42   __builtin_prefetch (glob_vol_ptr_vol_int, 0, 0);
  43   __builtin_prefetch (&glob_vol_int, 0, 0);
  44 }
  45
  46 /* Prefetch volatile static variables using the address of the variable.  */
  47
  48 void
  49 simple_vol_file ()
  50 {
  51   __builtin_prefetch (stat_vol_int_arr, 0, 0);
  52   __builtin_prefetch (stat_vol_ptr_int, 0, 0);
  53   __builtin_prefetch (stat_ptr_vol_int, 0, 0);
  54   __builtin_prefetch (stat_vol_ptr_vol_int, 0, 0);
  55   __builtin_prefetch (&stat_vol_int, 0, 0);
  56 }
  57
  58 /* Prefetch using address expressions involving volatile global variables.  */
  59
  60 void
  61 expr_vol_global (void)
  62 {
  63   __builtin_prefetch (&vol_str, 0, 0);
  64   __builtin_prefetch (ptr_vol_str, 0, 0);
  65   __builtin_prefetch (vol_ptr_str, 0, 0);
  66   __builtin_prefetch (vol_ptr_vol_str, 0, 0);
  67   __builtin_prefetch (&vol_str.b, 0, 0);
  68   __builtin_prefetch (&ptr_vol_str->b, 0, 0);
  69   __builtin_prefetch (&vol_ptr_str->b, 0, 0);
  70   __builtin_prefetch (&vol_ptr_vol_str->b, 0, 0);
  71   __builtin_prefetch (&vol_str.d, 0, 0);
  72   __builtin_prefetch (&vol_ptr_str->d, 0, 0);
  73   __builtin_prefetch (&ptr_vol_str->d, 0, 0);
  74   __builtin_prefetch (&vol_ptr_vol_str->d, 0, 0);
  75   __builtin_prefetch (vol_str.next, 0, 0);
  76   __builtin_prefetch (vol_ptr_str->next, 0, 0);
  77   __builtin_prefetch (ptr_vol_str->next, 0, 0);
  78   __builtin_prefetch (vol_ptr_vol_str->next, 0, 0);
  79   __builtin_prefetch (vol_str.next->d, 0, 0);
  80   __builtin_prefetch (vol_ptr_str->next->d, 0, 0);
  81   __builtin_prefetch (ptr_vol_str->next->d, 0, 0);
  82   __builtin_prefetch (vol_ptr_vol_str->next->d, 0, 0);
  83
  84   __builtin_prefetch (&glob_vol_int_arr, 0, 0);
  85   __builtin_prefetch (glob_vol_ptr_int, 0, 0);
  86   __builtin_prefetch (glob_ptr_vol_int, 0, 0);
  87   __builtin_prefetch (glob_vol_ptr_vol_int, 0, 0);
  88   __builtin_prefetch (&glob_vol_int_arr[2], 0, 0);
  89   __builtin_prefetch (&glob_vol_ptr_int[3], 0, 0);
  90   __builtin_prefetch (&glob_ptr_vol_int[3], 0, 0);
  91   __builtin_prefetch (&glob_vol_ptr_vol_int[3], 0, 0);
  92   __builtin_prefetch (glob_vol_int_arr+3, 0, 0);
  93   __builtin_prefetch (glob_vol_int_arr+glob_vol_int, 0, 0);
  94   __builtin_prefetch (glob_vol_ptr_int+5, 0, 0);
  95   __builtin_prefetch (glob_ptr_vol_int+5, 0, 0);
  96   __builtin_prefetch (glob_vol_ptr_vol_int+5, 0, 0);
  97   __builtin_prefetch (glob_vol_ptr_int+glob_vol_int, 0, 0);
  98   __builtin_prefetch (glob_ptr_vol_int+glob_vol_int, 0, 0);
  99   __builtin_prefetch (glob_vol_ptr_vol_int+glob_vol_int, 0, 0);
 100 }
 101
 102 int
 103 main ()
 104 {
 105   simple_vol_global ();
 106   simple_vol_file ();
 107
 108   str.next = &str;
 109   vol_str.next = &str;
 110   expr_vol_global ();
 111
 112   exit (0);
 113 }