gcc/testsuite/gcc.dg/vect/vect-alias-check-17.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target vect_load_lanes } */
   3
   4 struct s { int x[100]; };
   5
   6 void
   7 f (struct s *s1, int a, int b)
   8 {
   9   for (int i = 0; i < 32; ++i)
  10     s1->x[a + i] = s1->x[b + i * 2] + s1->x[b + i * 3];
  11 }
  12
  13 /* { dg-final { scan-tree-dump {flags: *[^\n]*MIXED_STEPS} "vect" } } */
  14 /* { dg-final { scan-tree-dump "using an address-based overlap test" "vect" } } */
  15 /* { dg-final { scan-tree-dump-not "using an index-based" "vect" } } */