gcc/testsuite/gcc.dg/vect/vect-iv-9.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 26
   7 int a[N];
   8
   9 __attribute__ ((noinline)) int main1 (int X)
  10 {
  11   int s = X;
  12   int i;
  13
  14   /* vectorization of reduction with induction.  */
  15   for (i = 0; i < N; i++)
  16     s += (i + a[i]);
  17
  18   return s;
  19 }
  20
  21 int main (void)
  22 {
  23   int s, i;
  24   check_vect ();
  25
  26   for (i = 0; i < N; i++)
  27     a[i] = 2*i;
  28
  29   s = main1 (3);
  30   if (s != 978)
  31     abort ();
  32
  33   return 0;
  34 }
  35
  36 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 2 "vect" { target vect_int_mult } } } */
  37 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target {! vect_int_mult } } } } */
  38 /* { dg-final { cleanup-tree-dump "vect" } } */