gcc/testsuite/gcc.dg/tree-ssa/alias-access-path-12.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1 -fno-strict-aliasing -fdump-tree-optimized" } */
   3
   4 struct S
   5 {
   6   int i;
   7   int j;
   8 };
   9 union U
  10 {
  11   struct S a[10];
  12 };
  13 int
  14 foo (union U *u, int n, int i, int j)
  15 {
  16   u->a[i].i = 123;
  17   u->a[j].j = j;
  18   return u->a[i].i;
  19 }
  20 /* { dg-final { scan-tree-dump-times "return 123" 1 "optimized"} } */