1 files changed, 18 insertions, 0 deletions
diff --git a/tests/mir-opt/simplify_locals_removes_unused_consts.rs b/tests/mir-opt/simplify_locals_removes_unused_consts.rs
new file mode 100644
index 000000000..7a03a2837
--- /dev/null
+++ b/tests/mir-opt/simplify_locals_removes_unused_consts.rs
@@ -0,0 +1,18 @@
+// unit-test: SimplifyLocals-before-const-prop
+// compile-flags: -C overflow-checks=no
+
+fn use_zst(_: ((), ())) {}
+
+struct Temp {
+    x: u8,
+}
+
+fn use_u8(_: u8) {}
+
+// EMIT_MIR simplify_locals_removes_unused_consts.main.SimplifyLocals-before-const-prop.diff
+fn main() {
+    let ((), ()) = ((), ());
+    use_zst(((), ()));
+
+    use_u8((Temp { x: 40 }).x + 2);
+}