1 files changed, 63 insertions, 0 deletions
diff --git a/llvm/unittests/Analysis/TBAATest.cpp b/llvm/unittests/Analysis/TBAATest.cpp
new file mode 100644
index 00000000000..98899dd553d
--- /dev/null
+++ b/llvm/unittests/Analysis/TBAATest.cpp
@@ -0,0 +1,63 @@
+//===--- TBAATest.cpp - Mixed TBAA unit tests -----------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Analysis/AliasAnalysisEvaluator.h"
+#include "llvm/Analysis/Passes.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/Instructions.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/MDBuilder.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IR/LegacyPassManager.h"
+#include "llvm/IR/Verifier.h"
+#include "llvm/Support/CommandLine.h"
+#include "gtest/gtest.h"
+
+namespace llvm {
+namespace {
+
+class OldTBAATest : public testing::Test {
+protected:
+  OldTBAATest() : M("MixedTBAATest", C), MD(C) {}
+
+  LLVMContext C;
+  Module M;
+  MDBuilder MD;
+};
+
+TEST_F(OldTBAATest, checkVerifierBehavior) {
+  // C++ unit test case to avoid going through the auto upgrade logic.
+
+  FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), {});
+  auto *F = cast<Function>(M.getOrInsertFunction("f", FTy));
+  auto *BB = BasicBlock::Create(C, "entry", F);
+  auto *IntType = Type::getInt32Ty(C);
+  auto *PtrType = Type::getInt32PtrTy(C);
+  auto *SI = new StoreInst(ConstantInt::get(IntType, 42),
+                           ConstantPointerNull::get(PtrType), BB);
+  ReturnInst::Create(C, nullptr, BB);
+
+  auto *RootMD = MD.createTBAARoot("Simple C/C++ TBAA");
+  auto *MD1 = MD.createTBAANode("omnipotent char", RootMD);
+  auto *MD2 = MD.createTBAANode("int", MD1);
+  SI->setMetadata(LLVMContext::MD_tbaa, MD2);
+
+  SmallVector<char, 0> ErrorMsg;
+  raw_svector_ostream Outs(ErrorMsg);
+
+  StringRef ExpectedFailureMsg(
+      "Old-style TBAA is no longer allowed, use struct-path TBAA instead");
+
+  EXPECT_TRUE(verifyFunction(*F, &Outs));
+  EXPECT_TRUE(StringRef(ErrorMsg.begin(), ErrorMsg.size())
+                  .startswith(ExpectedFailureMsg));
+}
+
+} // end anonymous namspace
+} // end llvm namespace