From 95aca052b5e6e9fde8b85188e6fe761c848afd75 Mon Sep 17 00:00:00 2001
From: Alex Gaynor <alex.gaynor@gmail.com>
Date: Sat, 28 Dec 2024 10:14:46 -0500
Subject: [PATCH] Added a codegen test for optimization with const arrays

Closes #107208
---
 tests/codegen/const-array.rs | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 tests/codegen/const-array.rs

diff --git a/tests/codegen/const-array.rs b/tests/codegen/const-array.rs
new file mode 100644
index 0000000000000..f23079627351c
--- /dev/null
+++ b/tests/codegen/const-array.rs
@@ -0,0 +1,22 @@
+//@ compile-flags: -O
+
+#![crate_type = "lib"]
+
+const LUT: [u8; 2] = [
+    1,
+    1,
+];
+
+// CHECK-LABEL: @decode
+#[no_mangle]
+pub fn decode(i: u8) -> u8 {
+    // CHECK: start:
+    // CHECK-NEXT: icmp
+    // CHECK-NEXT: select
+    // CHECK-NEXT: ret
+    if i < 2 {
+        LUT[i as usize]
+    } else {
+        2
+    }
+}