From 5663bb3f1c4637e36d6b6c3879b43e4f9e5bb347 Mon Sep 17 00:00:00 2001
From: Nikita Popov <npopov@redhat.com>
Date: Tue, 30 Aug 2022 15:03:22 +0200
Subject: [PATCH] Add test for issue #85872

This has been fixed by the LLVM 15 upgrade, add a codegen test.

Fixes #85872.
---
 .../codegen/issue-85872-multiple-reverse.rs   | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 src/test/codegen/issue-85872-multiple-reverse.rs

diff --git a/src/test/codegen/issue-85872-multiple-reverse.rs b/src/test/codegen/issue-85872-multiple-reverse.rs
new file mode 100644
index 0000000000000..591a1aca74747
--- /dev/null
+++ b/src/test/codegen/issue-85872-multiple-reverse.rs
@@ -0,0 +1,20 @@
+// min-llvm-version: 15.0.0
+// compile-flags: -O
+
+#![crate_type = "lib"]
+
+#[no_mangle]
+pub fn u16_be_to_arch(mut data: [u8; 2]) -> [u8; 2] {
+    // CHECK-LABEL: @u16_be_to_arch
+    // CHECK: @llvm.bswap.i16
+    data.reverse();
+    data
+}
+
+#[no_mangle]
+pub fn u32_be_to_arch(mut data: [u8; 4]) -> [u8; 4] {
+    // CHECK-LABEL: @u32_be_to_arch
+    // CHECK: @llvm.bswap.i32
+    data.reverse();
+    data
+}