From 4a8202c4a68ec6161dbc31dcb5b0ec51d84c9d87 Mon Sep 17 00:00:00 2001
From: Hans Kratz <hans@appfour.com>
Date: Wed, 21 Jul 2021 13:20:35 +0200
Subject: [PATCH] Add testcase for proper LLVM representation of SIMD types.

Testcase to make sure that no 0-sized padding is inserted in structs and that structs are represented as expected by Neon intrinsics in LLVM.
---
 src/test/codegen/unpadded-simd.rs | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 src/test/codegen/unpadded-simd.rs

diff --git a/src/test/codegen/unpadded-simd.rs b/src/test/codegen/unpadded-simd.rs
new file mode 100644
index 00000000000..eb44dbd9313
--- /dev/null
+++ b/src/test/codegen/unpadded-simd.rs
@@ -0,0 +1,14 @@
+// Make sure that no 0-sized padding is inserted in structs and that
+// structs are represented as expected by Neon intrinsics in LLVM.
+// See #87254.
+
+#![crate_type = "lib"]
+#![feature(repr_simd)]
+
+#[derive(Copy, Clone, Debug)]
+#[repr(simd)]
+pub struct int16x4_t(pub i16, pub i16, pub i16, pub i16);
+
+#[derive(Copy, Clone, Debug)]
+pub struct int16x4x2_t(pub int16x4_t, pub int16x4_t);
+// CHECK: %int16x4x2_t = type { <4 x i16>, <4 x i16> }