[llvm] [gn build] Port b8afba677502d (PR #228412)

[Nico Weber via llvm-commits]

https://github.com/nico created https://github.com/llvm/llvm-project/pull/228412

None

>From 4cbc81b122c9bb4fd56db7951616c9d94a624ab6 Mon Sep 17 00:00:00 2001
From: Nico Weber <thakis at chromium.org>
Date: Fri, 2 Oct 2026 05:11:28 -0700
Subject: [PATCH] [gn build] Port b8afba677502d

---
 llvm/utils/gn/secondary/clang/lib/CodeGenUtils/BUILD.gn | 1 +
 1 file changed, 1 insertion(+)

diff --git a/llvm/utils/gn/secondary/clang/lib/CodeGenUtils/BUILD.gn b/llvm/utils/gn/secondary/clang/lib/CodeGenUtils/BUILD.gn
index 94574cb8566d8d..c9574b7871ef55 100644
--- a/llvm/utils/gn/secondary/clang/lib/CodeGenUtils/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/lib/CodeGenUtils/BUILD.gn
@@ -7,6 +7,7 @@ static_library("CodeGenUtils") {
     "//llvm/lib/Support",
   ]
   sources = [
+    "BackendDiagnosticHandler.cpp",
     "CallUtils.cpp",
     "ClassUtils.cpp",
     "CodeGenUtils.cpp",