gcc/testsuite/gcc.dg/vect/pr80928.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target vect_int } */
   3
   4 #include "tree-vect.h"
   5
   6 int a[1020];
   7
   8 void __attribute__((noinline))
   9 foo ()
  10 {
  11   for (int i = 0; i < 1020; i += 5)
  12     {
  13       a[i] = i;
  14       a[i+1] = i;
  15       a[i+2] = i;
  16       a[i+3] = i;
  17       a[i+4] = i;
  18     }
  19 }
  20
  21 int main ()
  22 {
  23   check_vect ();
  24
  25   foo ();
  26
  27   /* check results */
  28 #pragma GCC novector
  29   for (int i = 0; i < 1020; ++i)
  30     if (a[i] != ((i + 4) / 5) * 5)
  31       abort ();
  32
  33   return 0;
  34 }
  35
  36 /* Make sure we are not triggering hybrid SLP due to the IV update.  */
  37 /* { dg-final { scan-tree-dump "Loop contains only SLP stmts" "vect" } } */
  38 /* { dg-final { scan-tree-dump "vectorized 1 loops" "vect" } } */