gcc/testsuite/gcc.dg/vect/no-scevccp-outer-3.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 40
   7
   8 int a[N];
   9
  10 __attribute__ ((noinline)) int
  11 foo (){
  12   int i,j;
  13   int sum;
  14
  15   /* inner-loop step > 1 */
  16   for (i = 0; i < N; i++) {
  17     sum = 0;
  18     for (j = 0; j < N; j+=2) {
  19       sum += j;
  20     }
  21     a[i] = sum;
  22   }
  23 }
  24
  25 int main (void)
  26 {
  27   int i,j;
  28   int sum;
  29
  30   check_vect ();
  31
  32   for (i=0; i<N; i++)
  33     a[i] = i;
  34
  35   foo ();
  36
  37     /* check results:  */
  38   for (i=0; i<N; i++)
  39     {
  40       sum = 0;
  41       for (j = 0; j < N; j+=2)
  42         sum += j;
  43       if (a[i] != sum)
  44         abort();
  45     }
  46
  47   return 0;
  48 }
  49
  50 /* { dg-final { scan-tree-dump-times "OUTER LOOP VECTORIZED." 1 "vect" } } */