gcc/testsuite/g++.dg/tree-ssa/pr87008.C

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-optimized" } */
   3
   4 extern void dontcallthis();
   5
   6 struct A { long a, b; };
   7 struct B : A {};
   8 template<class T>void cp(T&a,T const&b){a=b;}
   9 long f(B x){
  10   B y; cp<A>(y,x);
  11   B z; cp<A>(z,x);
  12   if (y.a - z.a)
  13     dontcallthis ();
  14   return 0;
  15 }
  16
  17 /* { dg-final { scan-tree-dump-not "dontcallthis" "optimized" } } */