gcc/testsuite/gcc.dg/tree-ssa/alias-access-path-4.c

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