[llvm] [gn build] Port 4214b4601f49 (PR #223190)

[Nico Weber via llvm-commits]

https://github.com/nico created https://github.com/llvm/llvm-project/pull/223190

None

>From 2afeaad1d8bc73eeee288e3bbf8703395b2a2ce9 Mon Sep 17 00:00:00 2001
From: Nico Weber <thakis at chromium.org>
Date: Sat, 12 Sep 2026 19:13:13 -0400
Subject: [PATCH] [gn build] Port 4214b4601f49

---
 llvm/utils/gn/secondary/llvm/lib/Frontend/HLSL/BUILD.gn  | 1 +
 llvm/utils/gn/secondary/llvm/unittests/Frontend/BUILD.gn | 1 +
 2 files changed, 2 insertions(+)

diff --git a/llvm/utils/gn/secondary/llvm/lib/Frontend/HLSL/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Frontend/HLSL/BUILD.gn
index 518da033d5612..ab07bbcb3bfe0 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Frontend/HLSL/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Frontend/HLSL/BUILD.gn
@@ -11,6 +11,7 @@ static_library("HLSL") {
     "HLSLRootSignature.cpp",
     "RootSignatureMetadata.cpp",
     "RootSignatureValidations.cpp",
+    "SemanticSignaturePacking.cpp",
     "SemanticSignatures.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/unittests/Frontend/BUILD.gn b/llvm/utils/gn/secondary/llvm/unittests/Frontend/BUILD.gn
index 338d366e7bfcb..b44013f38e8ce 100644
--- a/llvm/utils/gn/secondary/llvm/unittests/Frontend/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/unittests/Frontend/BUILD.gn
@@ -17,6 +17,7 @@ unittest("LLVMFrontendTests") {
     "HLSLBindingTest.cpp",
     "HLSLRootSignatureDumpTest.cpp",
     "HLSLSemanticSignatureMetadataTest.cpp",
+    "HLSLSemanticSignaturePackingTest.cpp",
     "HLSLSemanticStagesTest.cpp",
     "OpenACCTest.cpp",
     "OpenMPCompositionTest.cpp",