From 7d967ffa8df2ae74e4cff5d5ed7b53adedac00a2 Mon Sep 17 00:00:00 2001
From: Lzu Tao <taolzu@gmail.com>
Date: Mon, 20 May 2024 19:52:30 +0000
Subject: [PATCH] add codegen test for #109328

---
 .../codegen/issues/issue-109328-split_first.rs  | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 tests/codegen/issues/issue-109328-split_first.rs

diff --git a/tests/codegen/issues/issue-109328-split_first.rs b/tests/codegen/issues/issue-109328-split_first.rs
new file mode 100644
index 0000000000000..a43e653e1a264
--- /dev/null
+++ b/tests/codegen/issues/issue-109328-split_first.rs
@@ -0,0 +1,17 @@
+//@ compile-flags: -O
+//@ min-llvm-version: 17
+
+#![crate_type = "lib"]
+
+#[no_mangle]
+// CHECK-LABEL: @foo
+// CHECK: getelementptr inbounds
+// CHECK-NEXT: load i64
+// CHECK-NEXT: icmp eq i64
+// CHECK-NEXT: br i1
+#[no_mangle]
+pub fn foo(input: &mut &[u64]) -> Option<u64> {
+    let (first, rest) = input.split_first()?;
+    *input = rest;
+    Some(*first)
+}