gcc/testsuite/gcc.dg/vect/vect-bswap32.c

   1 /* { dg-additional-options "-msse4" { target sse4_runtime } } */
   2
   3 #include "tree-vect.h"
   4
   5 #define N 128
   6
   7 volatile int y = 0;
   8
   9 static inline void
  10 vfoo32 (unsigned int* a)
  11 {
  12   int i = 0;
  13   for (i = 0; i < N; ++i)
  14     a[i] = __builtin_bswap32 (a[i]);
  15 }
  16
  17 int
  18 main (void)
  19 {
  20   unsigned int arr[N];
  21   unsigned int expect[N];
  22   int i;
  23
  24   check_vect ();
  25
  26   for (i = 0; i < N; ++i)
  27     {
  28       arr[i] = i;
  29       expect[i] = __builtin_bswap32 (i);
  30       if (y) /* Avoid vectorisation.  */
  31         abort ();
  32     }
  33
  34   vfoo32 (arr);
  35
  36   for (i = 0; i < N; ++i)
  37     {
  38       if (arr[i] != expect[i])
  39         abort ();
  40     }
  41
  42   return 0;
  43 }
  44
  45 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target { vect_bswap || sse4_runtime } } } } */