1 files changed, 26 insertions, 0 deletions

diff --git a/tests/codegen/issues/issue-73031.rs b/tests/codegen/issues/issue-73031.rs
new file mode 100644
index 000000000..a09c4bcfb
--- /dev/null
+++ b/tests/codegen/issues/issue-73031.rs
@@ -0,0 +1,26 @@
+// compile-flags: -O
+#![crate_type = "lib"]
+
+// Test that LLVM can eliminate the unreachable `All::None` branch.
+
+pub enum All {
+    None,
+    Foo,
+    Bar,
+}
+
+// CHECK-LABEL: @issue_73031
+#[no_mangle]
+pub fn issue_73031(a: &mut All, q: i32) -> i32 {
+    *a = if q == 5 {
+        All::Foo
+    } else {
+        All::Bar
+    };
+    match *a {
+        // CHECK-NOT: panic
+        All::None => panic!(),
+        All::Foo => 1,
+        All::Bar => 2,
+    }
+}