[clang] [Clang][AArch64] Update comments in tests (nfc) (PR #186885)

[Andrzej Warzyński via cfe-commits]

https://github.com/banach-space created https://github.com/llvm/llvm-project/pull/186885

None

>From d02034af99003eff7508e3ddca7bb828bb707c6d Mon Sep 17 00:00:00 2001
From: Andrzej Warzynski <andrzej.warzynski at arm.com>
Date: Mon, 16 Mar 2026 21:10:41 +0000
Subject: [PATCH] [Clang][AArch64] Update comments in tests (nfc)

---
 clang/test/CodeGen/AArch64/neon/bf16-getset.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/clang/test/CodeGen/AArch64/neon/bf16-getset.c b/clang/test/CodeGen/AArch64/neon/bf16-getset.c
index 759b2a5af7121..2470fc3b7db15 100644
--- a/clang/test/CodeGen/AArch64/neon/bf16-getset.c
+++ b/clang/test/CodeGen/AArch64/neon/bf16-getset.c
@@ -6,8 +6,15 @@
 
 #include <arm_neon.h>
 
+//=============================================================================
+// NOTES
+//
+// ACLE section headings based on v2025Q2 of the ACLE specification:
+//  * https://arm-software.github.io/acle/neon_intrinsics/advsimd.html#bitwise-equal-to-zero
+//=============================================================================
+
 //===------------------------------------------------------===//
-// BF16 get/set lane
+// 2.4.1.2. Set all lanes to the same value
 //===------------------------------------------------------===//
 // TODO: Add the remaining intrinsics from this group.