diff --git a/llvm/utils/gn/secondary/llvm/lib/Transforms/Vectorize/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Transforms/Vectorize/BUILD.gn
index 0900872d444939..853cf341e28447 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Transforms/Vectorize/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Transforms/Vectorize/BUILD.gn
@@ -15,6 +15,7 @@ static_library("Vectorize") {
     "SLPVectorizer.cpp",
     "SandboxVectorizer/DependencyGraph.cpp",
     "SandboxVectorizer/Passes/BottomUpVec.cpp",
+    "SandboxVectorizer/Region.cpp",
     "SandboxVectorizer/SandboxVectorizer.cpp",
     "VPlan.cpp",
     "VPlanAnalysis.cpp",
diff --git a/llvm/utils/gn/secondary/llvm/unittests/Transforms/Vectorize/SandboxVectorizer/BUILD.gn b/llvm/utils/gn/secondary/llvm/unittests/Transforms/Vectorize/SandboxVectorizer/BUILD.gn
index c990fb313f557a..a91cb838c5e2c5 100644
--- a/llvm/utils/gn/secondary/llvm/unittests/Transforms/Vectorize/SandboxVectorizer/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/unittests/Transforms/Vectorize/SandboxVectorizer/BUILD.gn
@@ -12,5 +12,6 @@ unittest("SandboxVectorizerTests") {
   sources = [
     "DependencyGraphTest.cpp",
     "LegalityTest.cpp",
+    "RegionTest.cpp",
   ]
 }