gcc/testsuite/gcc.dg/vect/vect-outer-slp-1.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target vect_int } */
   3
   4 int a[1024];
   5
   6 void foo (void)
   7 {
   8   for (int i = 0; i < 1020; i += 4)
   9     {
  10       int suma = a[i];
  11       int sumb = a[i+1];
  12       int sumc = a[i+2];
  13       int sumd = a[i+3];
  14       for (unsigned j = 0; j < 77; ++j)
  15         {
  16           suma = (suma ^ i) + 1;
  17           sumb = (sumb ^ i) + 2;
  18           sumc = (sumc ^ i) + 3;
  19           sumd = (sumd ^ i) + 4;
  20         }
  21       a[i] = suma;
  22       a[i+1] = sumb;
  23       a[i+2] = sumc;
  24       a[i+3] = sumd;
  25     }
  26 }
  27
  28 /* We should vectorize this outer loop with SLP.  */
  29 /* { dg-final { scan-tree-dump "OUTER LOOP VECTORIZED" "vect" } } */
  30 /* We don't yet support SLP inductions for variable length vectors.  */
  31 /* { dg-final { scan-tree-dump "vectorizing stmts using SLP" "vect" { xfail vect_variable_length } } } */
  32 /* { dg-final { scan-tree-dump-not " = VEC_PERM_EXPR" "vect" } } */