gcc/testsuite/gcc.dg/vect/bb-slp-subgroups-3.c

   1 /* { dg-require-effective-target vect_int } */
   2 /* PR tree-optimization/67682.  */
   3
   4 #include "tree-vect.h"
   5
   6 int __attribute__((__aligned__(8))) a[8];
   7 int __attribute__((__aligned__(8))) b[8];
   8
   9 __attribute__ ((noinline)) void
  10 test ()
  11 {
  12     a[0] = b[0] + 1;
  13     a[1] = b[1] + 2;
  14     a[2] = b[2] + 3;
  15     a[3] = b[3] + 4;
  16     a[4] = b[0] * 3;
  17     a[5] = b[2] * 4;
  18     a[6] = b[4] * 5;
  19     a[7] = b[6] * 7;
  20 }
  21
  22 int
  23 main (int argc, char **argv)
  24 {
  25   check_vect ();
  26
  27   for (int i = 0; i < 8; i++)
  28     a[i] = 1;
  29   for (int i = 0; i < 8; i++)
  30     b[i] = i + 4;
  31   __asm__ volatile ("" : : : "memory");
  32   test (a, b);
  33   __asm__ volatile ("" : : : "memory");
  34   if ((a[0] != 5) || (a[1] != 7) || (a[2] != 9) || (a[3] != 11)
  35       || (a[4] != 12) || (a[5] != 24) || (a[6] != 40) || (a[7] != 70))
  36     abort ();
  37   return 0;
  38 }
  39
  40 /* { dg-final { scan-tree-dump-times "Basic block will be vectorized using SLP" 1 "slp2" } } */
  41 /* { dg-final { scan-tree-dump-times "basic block vectorized" 1 "slp2" } } */