gcc/testsuite/gcc.dg/vect/no-scevccp-outer-4.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 /* induction variable k advances through inner and outer loops.  */
  11
  12 __attribute__ ((noinline)) int
  13 foo (int n){
  14   int i,j,k=0;
  15   int sum;
  16
  17   if (n<=0)
  18     return 0;
  19
  20   for (i = 0; i < N; i++) {
  21     sum = 0;
  22     for (j = 0; j < n; j+=2) {
  23       sum += k++;
  24     }
  25     a[i] = sum + j;
  26   }
  27 }
  28
  29 int main (void)
  30 {
  31   int i,j,k=0;
  32   int sum;
  33
  34   check_vect ();
  35
  36   for (i=0; i<N; i++)
  37     a[i] = i;
  38
  39   foo (N);
  40
  41     /* check results:  */
  42 #pragma GCC novector
  43   for (i=0; i<N; i++)
  44     {
  45       sum = 0;
  46       for (j = 0; j < N; j+=2)
  47         sum += k++;
  48       if (a[i] != sum + j)
  49         abort();
  50     }
  51
  52   return 0;
  53 }
  54
  55 /* { dg-final { scan-tree-dump-times "OUTER LOOP VECTORIZED." 1 "vect" { xfail *-*-* } } } */