src/test/ui/issues/issue-41696.rs

   1 // run-pass
   2 #![allow(dead_code)]
   3 #![allow(unused_variables)]
   4 #![recursion_limit = "128"]
   5 // this used to cause exponential code-size blowup during LLVM passes.
   6
   7 #![feature(test)]
   8
   9 extern crate test;
  10
  11 struct MayUnwind;
  12
  13 impl Drop for MayUnwind {
  14     fn drop(&mut self) {
  15         if test::black_box(false) {
  16             panic!()
  17         }
  18     }
  19 }
  20
  21 struct DS<U> {
  22     may_unwind: MayUnwind,
  23     name: String,
  24     next: U,
  25 }
  26
  27 fn add<U>(ds: DS<U>, name: String) -> DS<DS<U>> {
  28     DS {
  29         may_unwind: MayUnwind,
  30         name: "?".to_owned(),
  31         next: ds,
  32     }
  33 }
  34
  35 fn main() {
  36     let deserializers = DS { may_unwind: MayUnwind, name: "?".to_owned(), next: () };
  37     let deserializers = add(deserializers, "?".to_owned());
  38     let deserializers = add(deserializers, "?".to_owned());
  39     let deserializers = add(deserializers, "?".to_owned());
  40     let deserializers = add(deserializers, "?".to_owned());
  41     let deserializers = add(deserializers, "?".to_owned());
  42     let deserializers = add(deserializers, "?".to_owned());
  43     let deserializers = add(deserializers, "?".to_owned()); // 0.7s
  44     let deserializers = add(deserializers, "?".to_owned()); // 1.3s
  45     let deserializers = add(deserializers, "?".to_owned()); // 2.4s
  46     let deserializers = add(deserializers, "?".to_owned()); // 6.7s
  47     let deserializers = add(deserializers, "?".to_owned()); // 26.0s
  48     let deserializers = add(deserializers, "?".to_owned()); // 114.0s
  49     let deserializers = add(deserializers, "?".to_owned()); // 228.0s
  50     let deserializers = add(deserializers, "?".to_owned()); // 400.0s
  51     let deserializers = add(deserializers, "?".to_owned()); // 800.0s
  52     let deserializers = add(deserializers, "?".to_owned()); // 1600.0s
  53     let deserializers = add(deserializers, "?".to_owned()); // 3200.0s
  54 }