gcc/testsuite/gcc.dg/vect/no-scevccp-outer-10b.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 int b[N];
  10
  11 __attribute__ ((noinline)) int
  12 foo (int n){
  13   int i,j;
  14   int sum,x,y;
  15
  16   if (n<=0)
  17     return 0;
  18
  19   for (i = 0; i < N/2; i++) {
  20     sum = 0;
  21     x = b[2*i];
  22     y = b[2*i+1];
  23     for (j = 0; j < n; j++) {
  24       sum += j;
  25     }
  26     a[2*i] = sum + x;
  27     a[2*i+1] = sum + y;
  28   }
  29 }
  30
  31 int main (void)
  32 {
  33   int i,j;
  34   int sum;
  35
  36   check_vect ();
  37
  38   for (i=0; i<N; i++)
  39     b[i] = i;
  40
  41   foo (N-1);
  42
  43     /* check results:  */
  44   for (i=0; i<N/2; i++)
  45     {
  46       sum = 0;
  47       for (j = 0; j < N-1; j++)
  48         sum += j;
  49       if (a[2*i] != sum + b[2*i] || a[2*i+1] != sum + b[2*i+1])
  50         abort();
  51     }
  52
  53   return 0;
  54 }
  55
  56 /* { dg-final { scan-tree-dump-times "OUTER LOOP VECTORIZED." 1 "vect" { target { vect_interleave && vect_extract_even_odd } } } } */
  57 /* { dg-final { cleanup-tree-dump "vect" } } */