From d6c73ebbf3df1331eb60a6fba1f4b0bd03274f49 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 | 15 +++++++++++++++
 1 file changed, 15 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..f2b331c315dce
--- /dev/null
+++ b/tests/codegen/const-array.rs
@@ -0,0 +1,15 @@
+//@ 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 }
+}