gcc/testsuite/gcc.dg/vect/bb-slp-subgroups-1.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[4];
   8
   9 __attribute__ ((noinline)) void
  10 test ()
  11 {
  12     a[0] = b[0];
  13     a[1] = b[1];
  14     a[2] = b[2];
  15     a[3] = b[3];
  16     a[4] = 0;
  17     a[5] = 0;
  18     a[6] = 0;
  19     a[7] = 0;
  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 < 4; i++)
  30     b[i] = i + 4;
  31   __asm__ volatile ("" : : : "memory");
  32   test (a, b);
  33   __asm__ volatile ("" : : : "memory");
  34   for (int i = 0; i < 4; i++)
  35     if (a[i] != i+4)
  36       abort ();
  37   for (int i = 4; i < 8; i++)
  38     if (a[i] != 0)
  39       abort ();
  40   return 0;
  41 }
  42
  43 /* { dg-final { scan-tree-dump-times "Basic block will be vectorized using SLP" 1 "slp2" } } */
  44 /* { dg-final { scan-tree-dump-times "basic block vectorized" 1 "slp2" } } */