gcc/testsuite/gcc.dg/tree-ssa/alias-access-path-5.c

   1
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -fdump-tree-optimized" } */
   4
   5 struct a {int v1;
   6           int v2;};
   7 struct b {int array[0]; struct a a[];};
   8 union c {struct b b;};
   9
  10 int
  11 test (struct b *bptr1, union c *cptr, int i, int j)
  12 {
  13   bptr1->a[i].v1=123;
  14   cptr->b.a[j].v2=1;
  15   return bptr1->a[i].v1;
  16 }
  17 int
  18 test2 (struct b *bptr1, union c *cptr, int i, int j)
  19 {
  20   bptr1->a[i].v1=124;
  21   cptr->b.a[j].v1=1;
  22   return bptr1->a[i].v1;
  23 }
  24 /* { dg-final { scan-tree-dump-times "return 123" 1 "optimized"  { xfail *-*-* } } } */
  25 /* { dg-final { scan-tree-dump-not "return 124" "optimized"} } */