src/test/ui/structs-enums/enum-nullable-simplifycfg-misopt.rs

   1 // run-pass
   2
   3 /*!
   4  * This is a regression test for a bug in LLVM, fixed in upstream r179587,
   5  * where the switch instructions generated for destructuring enums
   6  * represented with nullable pointers could be misoptimized in some cases.
   7  */
   8
   9 enum List<X> { Nil, Cons(X, Box<List<X>>) }
  10 pub fn main() {
  11     match List::Cons(10, Box::new(List::Nil)) {
  12         List::Cons(10, _) => {}
  13         List::Nil => {}
  14         _ => panic!()
  15     }
  16 }