gcc/testsuite/gcc.dg/vect/vect-outer-1a-big-array.c

   1 /* { dg-do compile } */
   2
   3 #define N 256
   4 signed short image[N][N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
   5 signed short block[N][N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
   6
   7 /* Can't do outer-loop vectorization because of non-consecutive access.  */
   8
   9 int
  10 foo (){
  11   int i,j;
  12   int diff = 0;
  13
  14   for (i = 0; i < N; i++) {
  15     for (j = 0; j < N; j+=8) {
  16       diff += (image[i][j] - block[i][j]);
  17     }
  18   }
  19   return diff;
  20 }
  21
  22 /* { dg-final { scan-tree-dump-times "OUTER LOOP VECTORIZED" 1 "vect" { xfail *-*-* } } } */
  23 /* { dg-final { scan-tree-dump-times "grouped access in outer loop" 1 "vect" } } */