From 218caa410aa38c29984be31a5229b9fa717560ee Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:19:13 +0200 Subject: Merging upstream version 1.68.2+dfsg1. Signed-off-by: Daniel Baumann --- .../ui/structs-enums/enum-nullable-simplifycfg-misopt.rs | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 tests/ui/structs-enums/enum-nullable-simplifycfg-misopt.rs (limited to 'tests/ui/structs-enums/enum-nullable-simplifycfg-misopt.rs') diff --git a/tests/ui/structs-enums/enum-nullable-simplifycfg-misopt.rs b/tests/ui/structs-enums/enum-nullable-simplifycfg-misopt.rs new file mode 100644 index 000000000..a05cf8b93 --- /dev/null +++ b/tests/ui/structs-enums/enum-nullable-simplifycfg-misopt.rs @@ -0,0 +1,16 @@ +// run-pass + +/*! + * This is a regression test for a bug in LLVM, fixed in upstream r179587, + * where the switch instructions generated for destructuring enums + * represented with nullable pointers could be misoptimized in some cases. + */ + +enum List { Nil, Cons(X, #[allow(unused_tuple_struct_fields)] Box>) } +pub fn main() { + match List::Cons(10, Box::new(List::Nil)) { + List::Cons(10, _) => {} + List::Nil => {} + _ => panic!() + } +} -- cgit v1.2.3