gcc/testsuite/gcc.dg/vect/bb-slp-4.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 16
   7
   8 unsigned short out[N];
   9 unsigned short in[N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
  10
  11 int i;
  12 __attribute__ ((noinline)) int
  13 main1 ()
  14 {
  15   unsigned short *pin = &in[0];
  16   unsigned short *pout = &out[0];
  17
  18   *pout++ = *pin++;
  19   *pout++ = *pin++;
  20
  21   if (i)
  22     __asm__ volatile ("" : : : "memory");
  23
  24   /* Check results.  */
  25   if (out[0] != in[0]
  26       || out[1] != in[1])
  27     abort();
  28
  29   return 0;
  30 }
  31
  32 int main (void)
  33 {
  34   check_vect ();
  35
  36   main1 ();
  37
  38   return 0;
  39 }
  40
  41 /* { dg-final { scan-tree-dump-times "basic block vectorized using SLP" 0 "slp" } } */
  42 /* { dg-final { cleanup-tree-dump "slp" } } */
  43