src/test/mir-opt/simplify-arm-identity.rs

   1 // Checks that `SimplifyArmIdentity` is not applied if enums have incompatible layouts.
   2 // Regression test for issue #66856.
   3 //
   4 // compile-flags: -Zmir-opt-level=2
   5
   6 enum Src {
   7     Foo(u8),
   8     Bar,
   9 }
  10
  11 enum Dst {
  12     Foo(u8),
  13 }
  14
  15 // EMIT_MIR rustc.main.SimplifyArmIdentity.diff
  16 fn main() {
  17     let e: Src = Src::Foo(0);
  18     let _: Dst = match e {
  19         Src::Foo(x) => Dst::Foo(x),
  20         Src::Bar => Dst::Foo(0),
  21     };
  22 }