Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 32 insertions, 0 deletions

diff --git a/tests/mir-opt/uninhabited_fallthrough_elimination.rs b/tests/mir-opt/uninhabited_fallthrough_elimination.rs
new file mode 100644
index 000000000..0853883f8
--- /dev/null
+++ b/tests/mir-opt/uninhabited_fallthrough_elimination.rs
@@ -0,0 +1,32 @@
+enum Empty {}
+
+enum S {
+    A(Empty),
+    B,
+    C,
+}
+
+use S::*;
+
+// EMIT_MIR uninhabited_fallthrough_elimination.keep_fallthrough.UninhabitedEnumBranching.diff
+fn keep_fallthrough(s: S) -> u32 {
+    match s {
+        A(_) => 1,
+        B => 2,
+        _ => 3,
+    }
+}
+
+// EMIT_MIR uninhabited_fallthrough_elimination.eliminate_fallthrough.UninhabitedEnumBranching.diff
+fn eliminate_fallthrough(s: S) -> u32 {
+    match s {
+        C => 1,
+        B => 2,
+        _ => 3,
+    }
+}
+
+fn main() {
+    keep_fallthrough(B);
+    eliminate_fallthrough(B);
+}