gcc/testsuite/gcc.dg/vect/no-scevccp-outer-18.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   for (i = 0; i < N/2; i++) {
  16     sum = 0;
  17     for (j = 0; j < N; j++) {
  18       sum += j;
  19     }
  20     a[2*i] = sum;
  21     a[2*i+1] = 2*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 #pragma GCC novector
  39   for (i=0; i<N/2; i++)
  40     {
  41       sum = 0;
  42       for (j = 0; j < N; j++)
  43         sum += j;
  44       if (a[2*i] != sum || a[2*i+1] != 2*sum)
  45         abort();
  46     }
  47
  48   return 0;
  49 }
  50
  51 /* { dg-final { scan-tree-dump-times "OUTER LOOP VECTORIZED." 1 "vect" { target { vect_interleave || vect_strided2 } } } } */