[gn build] Port 71e434d

Author: llvmgnsyncbot

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",

llvm/utils/gn/secondary/llvm/unittests/Transforms/Vectorize/SandboxVectorizer/BUILD.gn

@@ -12,5 +12,6 @@ unittest("SandboxVectorizerTests") {
   sources = [
     "DependencyGraphTest.cpp",
     "LegalityTest.cpp",
+    "RegionTest.cpp",
   ]
 }