[clang] [Clang] Fix __is_trivially_equaltiy_comparable documentation (PR #88528)

[Nikolas Klauser via cfe-commits]

https://github.com/philnik777 updated https://github.com/llvm/llvm-project/pull/88528

>From 0c9372749f4b2d52deddea82be4e77524a66a348 Mon Sep 17 00:00:00 2001
From: Nikolas Klauser <nikolasklauser at berlin.de>
Date: Fri, 12 Apr 2024 17:36:53 +0200
Subject: [PATCH] [Clang] Fix __is_trivially_equaltiy_comparable documentation

---
 clang/docs/LanguageExtensions.rst | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/clang/docs/LanguageExtensions.rst b/clang/docs/LanguageExtensions.rst
index 7b23e4d1c2f30c..40ff2d074e1648 100644
--- a/clang/docs/LanguageExtensions.rst
+++ b/clang/docs/LanguageExtensions.rst
@@ -1640,7 +1640,8 @@ The following type trait primitives are supported by Clang. Those traits marked
   were made trivially relocatable via the ``clang::trivial_abi`` attribute.
 * ``__is_trivially_equality_comparable`` (Clang): Returns true if comparing two
   objects of the provided type is known to be equivalent to comparing their
-  value representations.
+  object representations. Note that types containing padding bytes are never
+  trivially equality comparable.
 * ``__is_unbounded_array`` (C++, GNU, Microsoft, Embarcadero)
 * ``__is_union`` (C++, GNU, Microsoft, Embarcadero)
 * ``__is_unsigned`` (C++, Embarcadero):