no-scevccp-outer-22.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 (int n){
  12   int i,j;
  13   int sum;
  14
  15   if (n<=0)
  16     return 0;
  17
  18   /* inner-loop index j used after the inner-loop */
  19   for (i = 0; i < N; i++) {
  20     sum = 0;
  21     for (j = 0; j < n; j+=2) {
  22       sum += j;
  23     }
  24     a[i] = sum + j;
  25   }
  26 }
  27
  28 int main (void)
  29 {
  30   int i,j;
  31   int sum;
  32
  33   check_vect ();
  34
  35   for (i=0; i<N; i++)
  36     a[i] = i;
  37
  38   foo (N);
  39
  40     /* check results:  */
  41   for (i=0; i<N; i++)
  42     {
  43       sum = 0;
  44       for (j = 0; j < N; j+=2)
  45         sum += j;
  46       if (a[i] != sum + j)
  47         abort();
  48     }
  49
  50   return 0;
  51 }
  52
  53 /* { dg-final { scan-tree-dump-times "OUTER LOOP VECTORIZED." 1 "vect" } } */
  54 /* { dg-final { cleanup-tree-dump "vect" } } */