1 files changed, 26 insertions, 0 deletions
diff --git a/tests/codegen/enum-bounds-check.rs b/tests/codegen/enum-bounds-check.rs
new file mode 100644
index 000000000..17322d591
--- /dev/null
+++ b/tests/codegen/enum-bounds-check.rs
@@ -0,0 +1,26 @@
+// compile-flags: -O
+
+#![crate_type = "lib"]
+
+pub enum Foo {
+    A, B
+}
+
+// CHECK-LABEL: @lookup
+#[no_mangle]
+pub fn lookup(buf: &[u8; 2], f: Foo) -> u8 {
+    // CHECK-NOT: panic_bounds_check
+    buf[f as usize]
+}
+
+pub enum Bar {
+    A = 2,
+    B = 3
+}
+
+// CHECK-LABEL: @lookup_unmodified
+#[no_mangle]
+pub fn lookup_unmodified(buf: &[u8; 5], f: Bar) -> u8 {
+    // CHECK-NOT: panic_bounds_check
+    buf[f as usize]
+}