gcc/testsuite/gcc.dg/vect/slp-perm-10.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include "tree-vect.h"
   4
   5 int a[256], b[256];
   6
   7 void __attribute__((noinline))
   8 foo (void)
   9 {
  10   int i;
  11   for (i = 0; i < 32; ++i)
  12     {
  13       b[i*8+0] = a[i*8+0];
  14       b[i*8+1] = a[i*8+0];
  15       b[i*8+2] = a[i*8+3];
  16       b[i*8+3] = a[i*8+3];
  17       b[i*8+4] = a[i*8+4];
  18       b[i*8+5] = a[i*8+6];
  19       b[i*8+6] = a[i*8+4];
  20       b[i*8+7] = a[i*8+6];
  21     }
  22 }
  23
  24 int main ()
  25 {
  26   int i;
  27
  28   check_vect ();
  29
  30   for (i = 0; i < 256; ++i)
  31     {
  32       a[i] = i;
  33       __asm__ volatile ("");
  34     }
  35
  36   foo ();
  37
  38   for (i = 0; i < 32; ++i)
  39     if (b[i*8+0] != i*8+0
  40         || b[i*8+1] != i*8+0
  41         || b[i*8+2] != i*8+3
  42         || b[i*8+3] != i*8+3
  43         || b[i*8+4] != i*8+4
  44         || b[i*8+5] != i*8+6
  45         || b[i*8+6] != i*8+4
  46         || b[i*8+7] != i*8+6)
  47       abort ();
  48
  49   return 0;
  50 }
  51
  52 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_perm } } } */
  53 /* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 1 "vect" { target vect_perm } } } */