Resubmit unittests for DebugInfoPDB.

These were originally submitted as part of r228428, but this part
caused a build breakage in LLVMConfig.  The library portion was
resubmitted independently since it was not causing breakage.

There were two reasons this was causing the build to fail.  The
first is that there were no Makefiles added for the PDB tests.  And
the second is that the DebugInfoPDB library was only being built by
CMake behind an "if (MSVC)" check.  This is wrong since this the
library hides platform specific details, and it was causing
LLVM-Config to not find the library when trying to build unittests.

llvm-svn: 228482

8 files changed, 417 insertions, 13 deletions

diff --git a/llvm/unittests/DebugInfo/CMakeLists.txt b/llvm/unittests/DebugInfo/CMakeLists.txt
index ffc908608ab..dae472bafdd 100644
--- a/llvm/unittests/DebugInfo/CMakeLists.txt
+++ b/llvm/unittests/DebugInfo/CMakeLists.txt
@@ -1,11 +1,3 @@
-set(LLVM_LINK_COMPONENTS
-  DebugInfoDWARF
-  )
 
-set(DebugInfoSources
-  DWARFFormValueTest.cpp
-  )
-
-add_llvm_unittest(DebugInfoTests
-  ${DebugInfoSources}
-  )
+add_subdirectory(DWARF)
+add_subdirectory(PDB)
diff --git a/llvm/unittests/DebugInfo/DWARF/CMakeLists.txt b/llvm/unittests/DebugInfo/DWARF/CMakeLists.txt
new file mode 100644
index 00000000000..4bec17cbb52
--- /dev/null
+++ b/llvm/unittests/DebugInfo/DWARF/CMakeLists.txt
@@ -0,0 +1,11 @@
+set(LLVM_LINK_COMPONENTS
+  DebugInfoDWARF
+  )
+
+set(DebugInfoSources
+  DWARFFormValueTest.cpp
+  )
+
+add_llvm_unittest(DebugInfoDWARFTests
+  ${DebugInfoSources}
+  )
diff --git a/llvm/unittests/DebugInfo/DWARFFormValueTest.cpp b/llvm/unittests/DebugInfo/DWARF/DWARFFormValueTest.cpp
index 4521132de5e..4521132de5e 100644
--- a/llvm/unittests/DebugInfo/DWARFFormValueTest.cpp
+++ b/llvm/unittests/DebugInfo/DWARF/DWARFFormValueTest.cpp
diff --git a/llvm/unittests/DebugInfo/DWARF/Makefile b/llvm/unittests/DebugInfo/DWARF/Makefile
new file mode 100644
index 00000000000..b0f40e1ca9d
--- /dev/null
+++ b/llvm/unittests/DebugInfo/DWARF/Makefile
@@ -0,0 +1,16 @@
+##===- unittests/DebugInfo/Makefile ------------------------*- Makefile -*-===##
+#
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+##===----------------------------------------------------------------------===##
+
+LEVEL = ../../..
+TESTNAME = DebugInfoDWARF
+LINK_COMPONENTS := DebugInfoDWARF object support
+
+include $(LEVEL)/Makefile.config
+
+include $(LLVM_SRC_ROOT)/unittests/Makefile.unittest
diff --git a/llvm/unittests/DebugInfo/Makefile b/llvm/unittests/DebugInfo/Makefile
index ad3cb22bbd1..1889ad22db1 100644
--- a/llvm/unittests/DebugInfo/Makefile
+++ b/llvm/unittests/DebugInfo/Makefile
@@ -6,11 +6,10 @@
 # License. See LICENSE.TXT for details.
 #
 ##===----------------------------------------------------------------------===##
-
 LEVEL = ../..
-TESTNAME = DebugInfo
-LINK_COMPONENTS := DebugInfoDWARF object support
 
 include $(LEVEL)/Makefile.config
 
+PARALLEL_DIRS := DWARF PDB
+
 include $(LLVM_SRC_ROOT)/unittests/Makefile.unittest
diff --git a/llvm/unittests/DebugInfo/PDB/CMakeLists.txt b/llvm/unittests/DebugInfo/PDB/CMakeLists.txt
new file mode 100644
index 00000000000..91924a5a875
--- /dev/null
+++ b/llvm/unittests/DebugInfo/PDB/CMakeLists.txt
@@ -0,0 +1,11 @@
+set(LLVM_LINK_COMPONENTS
+  DebugInfoPDB
+  )
+
+set(DebugInfoPDBSources
+  PDBApiTest.cpp
+  )
+
+add_llvm_unittest(DebugInfoPDBTests
+  ${DebugInfoPDBSources}
+  )
diff --git a/llvm/unittests/DebugInfo/PDB/Makefile b/llvm/unittests/DebugInfo/PDB/Makefile
new file mode 100644
index 00000000000..eb118a3fd2b
--- /dev/null
+++ b/llvm/unittests/DebugInfo/PDB/Makefile
@@ -0,0 +1,16 @@
+##===- unittests/DebugInfo/PDB/Makefile -------------------*- Makefile -*-===##
+#
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+##===----------------------------------------------------------------------===##
+
+LEVEL = ../../..
+TESTNAME = DebugInfoPDB
+LINK_COMPONENTS := DebugInfoPDB support
+
+include $(LEVEL)/Makefile.config
+
+include $(LLVM_SRC_ROOT)/unittests/Makefile.unittest
diff --git a/llvm/unittests/DebugInfo/PDB/PDBApiTest.cpp b/llvm/unittests/DebugInfo/PDB/PDBApiTest.cpp
new file mode 100644
index 00000000000..d8dbb7adb0a
--- /dev/null
+++ b/llvm/unittests/DebugInfo/PDB/PDBApiTest.cpp
@@ -0,0 +1,359 @@
+//===- llvm/unittest/DebugInfo/PDB/PDBApiTest.cpp -------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include <unordered_map>
+
+#include "llvm/DebugInfo/PDB/IPDBEnumChildren.h"
+#include "llvm/DebugInfo/PDB/IPDBRawSymbol.h"
+#include "llvm/DebugInfo/PDB/PDBSymbol.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolAnnotation.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolBlock.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolCompiland.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolCompilandDetails.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolCompilandEnv.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolCustom.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolData.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolExe.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolFunc.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolFuncDebugEnd.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolFuncDebugStart.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolLabel.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolPublicSymbol.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolThunk.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeArray.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeBaseClass.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeBuiltin.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeCustom.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeDimension.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeEnum.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeFriend.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeFunctionArg.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeFunctionSig.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeManaged.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypePointer.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeTypedef.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeUDT.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeVTable.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeVTableShape.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolUnknown.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolUsingNamespace.h"
+#include "llvm/DebugInfo/PDB/PDBTypes.h"
+#include "gtest/gtest.h"
+using namespace llvm;
+
+namespace std {
+  template<>
+  struct hash<PDB_SymType> {
+  public:
+    std::size_t operator()(PDB_SymType Symbol) const {
+      return std::hash<int>()(static_cast<int>(Symbol));
+    }
+  };
+}
+
+namespace {
+
+#define MOCK_SYMBOL_ACCESSOR(Func)                                             \
+  auto Func() const->decltype(((IPDBRawSymbol *)nullptr)->Func()) override {   \
+    typedef decltype(IPDBRawSymbol::Func()) ReturnType;                        \
+    return ReturnType();                                                       \
+  }
+
+class MockRawSymbol : public IPDBRawSymbol {
+public:
+  MockRawSymbol(PDB_SymType SymType) : Type(SymType) {}
+
+  virtual void dump(llvm::raw_ostream &OS) const {}
+
+  virtual std::unique_ptr<IPDBEnumSymbols>
+  findChildren(PDB_SymType Type, StringRef Name,
+               PDB_NameSearchFlags Flags) const {
+    return nullptr;
+  }
+  virtual std::unique_ptr<IPDBEnumSymbols>
+  findChildrenByRVA(PDB_SymType Type, StringRef Name, PDB_NameSearchFlags Flags,
+                    uint32_t RVA) const {
+    return nullptr;
+  }
+  virtual std::unique_ptr<IPDBEnumSymbols>
+  findInlineFramesByRVA(uint32_t RVA) const {
+    return nullptr;
+  }
+
+  virtual void getDataBytes(llvm::SmallVector<uint8_t, 32> &bytes) const {}
+
+  PDB_SymType getSymTag() const override { return Type; }
+
+  MOCK_SYMBOL_ACCESSOR(getAccess)
+  MOCK_SYMBOL_ACCESSOR(getAddressOffset)
+  MOCK_SYMBOL_ACCESSOR(getAddressSection)
+  MOCK_SYMBOL_ACCESSOR(getAge)
+  MOCK_SYMBOL_ACCESSOR(getArrayIndexTypeId)
+  MOCK_SYMBOL_ACCESSOR(getBackEndBuild)
+  MOCK_SYMBOL_ACCESSOR(getBackEndMajor)
+  MOCK_SYMBOL_ACCESSOR(getBackEndMinor)
+  MOCK_SYMBOL_ACCESSOR(getBaseDataOffset)
+  MOCK_SYMBOL_ACCESSOR(getBaseDataSlot)
+  MOCK_SYMBOL_ACCESSOR(getBaseSymbolId)
+  MOCK_SYMBOL_ACCESSOR(getBuiltinType)
+  MOCK_SYMBOL_ACCESSOR(getBitPosition)
+  MOCK_SYMBOL_ACCESSOR(getCallingConvention)
+  MOCK_SYMBOL_ACCESSOR(getClassParentId)
+  MOCK_SYMBOL_ACCESSOR(getCompilerName)
+  MOCK_SYMBOL_ACCESSOR(getCount)
+  MOCK_SYMBOL_ACCESSOR(getCountLiveRanges)
+  MOCK_SYMBOL_ACCESSOR(getFrontEndBuild)
+  MOCK_SYMBOL_ACCESSOR(getFrontEndMajor)
+  MOCK_SYMBOL_ACCESSOR(getFrontEndMinor)
+  MOCK_SYMBOL_ACCESSOR(getLanguage)
+  MOCK_SYMBOL_ACCESSOR(getLexicalParentId)
+  MOCK_SYMBOL_ACCESSOR(getLibraryName)
+  MOCK_SYMBOL_ACCESSOR(getLiveRangeStartAddressOffset)
+  MOCK_SYMBOL_ACCESSOR(getLiveRangeStartAddressSection)
+  MOCK_SYMBOL_ACCESSOR(getLiveRangeStartRelativeVirtualAddress)
+  MOCK_SYMBOL_ACCESSOR(getLocalBasePointerRegisterId)
+  MOCK_SYMBOL_ACCESSOR(getLowerBoundId)
+  MOCK_SYMBOL_ACCESSOR(getMemorySpaceKind)
+  MOCK_SYMBOL_ACCESSOR(getName)
+  MOCK_SYMBOL_ACCESSOR(getNumberOfAcceleratorPointerTags)
+  MOCK_SYMBOL_ACCESSOR(getNumberOfColumns)
+  MOCK_SYMBOL_ACCESSOR(getNumberOfModifiers)
+  MOCK_SYMBOL_ACCESSOR(getNumberOfRegisterIndices)
+  MOCK_SYMBOL_ACCESSOR(getNumberOfRows)
+  MOCK_SYMBOL_ACCESSOR(getObjectFileName)
+  MOCK_SYMBOL_ACCESSOR(getOemId)
+  MOCK_SYMBOL_ACCESSOR(getOemSymbolId)
+  MOCK_SYMBOL_ACCESSOR(getOffsetInUdt)
+  MOCK_SYMBOL_ACCESSOR(getPlatform)
+  MOCK_SYMBOL_ACCESSOR(getRank)
+  MOCK_SYMBOL_ACCESSOR(getRegisterId)
+  MOCK_SYMBOL_ACCESSOR(getRegisterType)
+  MOCK_SYMBOL_ACCESSOR(getRelativeVirtualAddress)
+  MOCK_SYMBOL_ACCESSOR(getSamplerSlot)
+  MOCK_SYMBOL_ACCESSOR(getSignature)
+  MOCK_SYMBOL_ACCESSOR(getSizeInUdt)
+  MOCK_SYMBOL_ACCESSOR(getSlot)
+  MOCK_SYMBOL_ACCESSOR(getSourceFileName)
+  MOCK_SYMBOL_ACCESSOR(getStride)
+  MOCK_SYMBOL_ACCESSOR(getSubTypeId)
+  MOCK_SYMBOL_ACCESSOR(getSymbolsFileName)
+  MOCK_SYMBOL_ACCESSOR(getSymIndexId)
+  MOCK_SYMBOL_ACCESSOR(getTargetOffset)
+  MOCK_SYMBOL_ACCESSOR(getTargetRelativeVirtualAddress)
+  MOCK_SYMBOL_ACCESSOR(getTargetVirtualAddress)
+  MOCK_SYMBOL_ACCESSOR(getTargetSection)
+  MOCK_SYMBOL_ACCESSOR(getTextureSlot)
+  MOCK_SYMBOL_ACCESSOR(getTimeStamp)
+  MOCK_SYMBOL_ACCESSOR(getToken)
+  MOCK_SYMBOL_ACCESSOR(getTypeId)
+  MOCK_SYMBOL_ACCESSOR(getUavSlot)
+  MOCK_SYMBOL_ACCESSOR(getUndecoratedName)
+  MOCK_SYMBOL_ACCESSOR(getUnmodifiedTypeId)
+  MOCK_SYMBOL_ACCESSOR(getUpperBoundId)
+  MOCK_SYMBOL_ACCESSOR(getVirtualBaseDispIndex)
+  MOCK_SYMBOL_ACCESSOR(getVirtualBaseOffset)
+  MOCK_SYMBOL_ACCESSOR(getVirtualTableShapeId)
+  MOCK_SYMBOL_ACCESSOR(getDataKind)
+  MOCK_SYMBOL_ACCESSOR(getGuid)
+  MOCK_SYMBOL_ACCESSOR(getOffset)
+  MOCK_SYMBOL_ACCESSOR(getThisAdjust)
+  MOCK_SYMBOL_ACCESSOR(getVirtualBasePointerOffset)
+  MOCK_SYMBOL_ACCESSOR(getLocationType)
+  MOCK_SYMBOL_ACCESSOR(getMachineType)
+  MOCK_SYMBOL_ACCESSOR(getThunkOrdinal)
+  MOCK_SYMBOL_ACCESSOR(getLength)
+  MOCK_SYMBOL_ACCESSOR(getLiveRangeLength)
+  MOCK_SYMBOL_ACCESSOR(getVirtualAddress)
+  MOCK_SYMBOL_ACCESSOR(getUdtKind)
+  MOCK_SYMBOL_ACCESSOR(hasConstructor)
+  MOCK_SYMBOL_ACCESSOR(hasCustomCallingConvention)
+  MOCK_SYMBOL_ACCESSOR(hasFarReturn)
+  MOCK_SYMBOL_ACCESSOR(isCode)
+  MOCK_SYMBOL_ACCESSOR(isCompilerGenerated)
+  MOCK_SYMBOL_ACCESSOR(isConstType)
+  MOCK_SYMBOL_ACCESSOR(isEditAndContinueEnabled)
+  MOCK_SYMBOL_ACCESSOR(isFunction)
+  MOCK_SYMBOL_ACCESSOR(getAddressTaken)
+  MOCK_SYMBOL_ACCESSOR(getNoStackOrdering)
+  MOCK_SYMBOL_ACCESSOR(hasAlloca)
+  MOCK_SYMBOL_ACCESSOR(hasAssignmentOperator)
+  MOCK_SYMBOL_ACCESSOR(hasCTypes)
+  MOCK_SYMBOL_ACCESSOR(hasCastOperator)
+  MOCK_SYMBOL_ACCESSOR(hasDebugInfo)
+  MOCK_SYMBOL_ACCESSOR(hasEH)
+  MOCK_SYMBOL_ACCESSOR(hasEHa)
+  MOCK_SYMBOL_ACCESSOR(hasInlAsm)
+  MOCK_SYMBOL_ACCESSOR(hasInlineAttribute)
+  MOCK_SYMBOL_ACCESSOR(hasInterruptReturn)
+  MOCK_SYMBOL_ACCESSOR(hasLongJump)
+  MOCK_SYMBOL_ACCESSOR(hasManagedCode)
+  MOCK_SYMBOL_ACCESSOR(hasNestedTypes)
+  MOCK_SYMBOL_ACCESSOR(hasNoInlineAttribute)
+  MOCK_SYMBOL_ACCESSOR(hasNoReturnAttribute)
+  MOCK_SYMBOL_ACCESSOR(hasOptimizedCodeDebugInfo)
+  MOCK_SYMBOL_ACCESSOR(hasOverloadedOperator)
+  MOCK_SYMBOL_ACCESSOR(hasSEH)
+  MOCK_SYMBOL_ACCESSOR(hasSecurityChecks)
+  MOCK_SYMBOL_ACCESSOR(hasSetJump)
+  MOCK_SYMBOL_ACCESSOR(hasStrictGSCheck)
+  MOCK_SYMBOL_ACCESSOR(isAcceleratorGroupSharedLocal)
+  MOCK_SYMBOL_ACCESSOR(isAcceleratorPointerTagLiveRange)
+  MOCK_SYMBOL_ACCESSOR(isAcceleratorStubFunction)
+  MOCK_SYMBOL_ACCESSOR(isAggregated)
+  MOCK_SYMBOL_ACCESSOR(isIntroVirtualFunction)
+  MOCK_SYMBOL_ACCESSOR(isCVTCIL)
+  MOCK_SYMBOL_ACCESSOR(isConstructorVirtualBase)
+  MOCK_SYMBOL_ACCESSOR(isCxxReturnUdt)
+  MOCK_SYMBOL_ACCESSOR(isDataAligned)
+  MOCK_SYMBOL_ACCESSOR(isHLSLData)
+  MOCK_SYMBOL_ACCESSOR(isHotpatchable)
+  MOCK_SYMBOL_ACCESSOR(isIndirectVirtualBaseClass)
+  MOCK_SYMBOL_ACCESSOR(isInterfaceUdt)
+  MOCK_SYMBOL_ACCESSOR(isIntrinsic)
+  MOCK_SYMBOL_ACCESSOR(isLTCG)
+  MOCK_SYMBOL_ACCESSOR(isLocationControlFlowDependent)
+  MOCK_SYMBOL_ACCESSOR(isMSILNetmodule)
+  MOCK_SYMBOL_ACCESSOR(isMatrixRowMajor)
+  MOCK_SYMBOL_ACCESSOR(isManagedCode)
+  MOCK_SYMBOL_ACCESSOR(isMSILCode)
+  MOCK_SYMBOL_ACCESSOR(isMultipleInheritance)
+  MOCK_SYMBOL_ACCESSOR(isNaked)
+  MOCK_SYMBOL_ACCESSOR(isNested)
+  MOCK_SYMBOL_ACCESSOR(isOptimizedAway)
+  MOCK_SYMBOL_ACCESSOR(isPacked)
+  MOCK_SYMBOL_ACCESSOR(isPointerBasedOnSymbolValue)
+  MOCK_SYMBOL_ACCESSOR(isPointerToDataMember)
+  MOCK_SYMBOL_ACCESSOR(isPointerToMemberFunction)
+  MOCK_SYMBOL_ACCESSOR(isPureVirtual)
+  MOCK_SYMBOL_ACCESSOR(isRValueReference)
+  MOCK_SYMBOL_ACCESSOR(isRefUdt)
+  MOCK_SYMBOL_ACCESSOR(isReference)
+  MOCK_SYMBOL_ACCESSOR(isRestrictedType)
+  MOCK_SYMBOL_ACCESSOR(isReturnValue)
+  MOCK_SYMBOL_ACCESSOR(isSafeBuffers)
+  MOCK_SYMBOL_ACCESSOR(isScoped)
+  MOCK_SYMBOL_ACCESSOR(isSdl)
+  MOCK_SYMBOL_ACCESSOR(isSingleInheritance)
+  MOCK_SYMBOL_ACCESSOR(isSplitted)
+  MOCK_SYMBOL_ACCESSOR(isStatic)
+  MOCK_SYMBOL_ACCESSOR(hasPrivateSymbols)
+  MOCK_SYMBOL_ACCESSOR(isUnalignedType)
+  MOCK_SYMBOL_ACCESSOR(isUnreached)
+  MOCK_SYMBOL_ACCESSOR(isValueUdt)
+  MOCK_SYMBOL_ACCESSOR(isVirtual)
+  MOCK_SYMBOL_ACCESSOR(isVirtualBaseClass)
+  MOCK_SYMBOL_ACCESSOR(isVirtualInheritance)
+  MOCK_SYMBOL_ACCESSOR(isVolatileType)
+
+private:
+  PDB_SymType Type;
+};
+
+class PDBApiTest : public testing::Test {
+public:
+  std::unordered_map<PDB_SymType, std::unique_ptr<PDBSymbol>> SymbolMap;
+
+  void SetUp() override {
+    InsertItemWithTag(PDB_SymType::None);
+    InsertItemWithTag(PDB_SymType::Exe);
+    InsertItemWithTag(PDB_SymType::Compiland);
+    InsertItemWithTag(PDB_SymType::CompilandDetails);
+    InsertItemWithTag(PDB_SymType::CompilandEnv);
+    InsertItemWithTag(PDB_SymType::Function);
+    InsertItemWithTag(PDB_SymType::Block);
+    InsertItemWithTag(PDB_SymType::Data);
+    InsertItemWithTag(PDB_SymType::Annotation);
+    InsertItemWithTag(PDB_SymType::Label);
+    InsertItemWithTag(PDB_SymType::PublicSymbol);
+    InsertItemWithTag(PDB_SymType::UDT);
+    InsertItemWithTag(PDB_SymType::Enum);
+    InsertItemWithTag(PDB_SymType::FunctionSig);
+    InsertItemWithTag(PDB_SymType::PointerType);
+    InsertItemWithTag(PDB_SymType::ArrayType);
+    InsertItemWithTag(PDB_SymType::BuiltinType);
+    InsertItemWithTag(PDB_SymType::Typedef);
+    InsertItemWithTag(PDB_SymType::BaseClass);
+    InsertItemWithTag(PDB_SymType::Friend);
+    InsertItemWithTag(PDB_SymType::FunctionArg);
+    InsertItemWithTag(PDB_SymType::FuncDebugStart);
+    InsertItemWithTag(PDB_SymType::FuncDebugEnd);
+    InsertItemWithTag(PDB_SymType::UsingNamespace);
+    InsertItemWithTag(PDB_SymType::VTableShape);
+    InsertItemWithTag(PDB_SymType::VTable);
+    InsertItemWithTag(PDB_SymType::Custom);
+    InsertItemWithTag(PDB_SymType::Thunk);
+    InsertItemWithTag(PDB_SymType::CustomType);
+    InsertItemWithTag(PDB_SymType::ManagedType);
+    InsertItemWithTag(PDB_SymType::Dimension);
+    InsertItemWithTag(PDB_SymType::Max);
+  }
+
+private:
+  void InsertItemWithTag(PDB_SymType Tag) {
+    auto RawSymbol = std::unique_ptr<IPDBRawSymbol>(new MockRawSymbol(Tag));
+    auto Symbol = PDBSymbol::create(std::move(RawSymbol));
+    SymbolMap.insert(std::make_pair(Tag, std::move(Symbol)));
+  }
+
+public:
+  template <class ExpectedType> void VerifyDyncast(PDB_SymType Tag) {
+    for (auto item = SymbolMap.begin(); item != SymbolMap.end(); ++item) {
+      EXPECT_EQ(item->first == Tag, llvm::isa<ExpectedType>(*item->second));
+    }
+  }
+
+  void VerifyUnknownDyncasts() {
+    for (auto item = SymbolMap.begin(); item != SymbolMap.end(); ++item) {
+      bool should_match = false;
+      if (item->first == PDB_SymType::None || item->first >= PDB_SymType::Max)
+        should_match = true;
+
+      EXPECT_EQ(should_match, llvm::isa<PDBSymbolUnknown>(*item->second));
+    }
+  }
+};
+
+TEST_F(PDBApiTest, Dyncast) {
+
+  // Most of the types have a one-to-one mapping between Tag and concrete type.
+  VerifyDyncast<PDBSymbolExe>(PDB_SymType::Exe);
+  VerifyDyncast<PDBSymbolCompiland>(PDB_SymType::Compiland);
+  VerifyDyncast<PDBSymbolCompilandDetails>(PDB_SymType::CompilandDetails);
+  VerifyDyncast<PDBSymbolCompilandEnv>(PDB_SymType::CompilandEnv);
+  VerifyDyncast<PDBSymbolFunc>(PDB_SymType::Function);
+  VerifyDyncast<PDBSymbolBlock>(PDB_SymType::Block);
+  VerifyDyncast<PDBSymbolData>(PDB_SymType::Data);
+  VerifyDyncast<PDBSymbolAnnotation>(PDB_SymType::Annotation);
+  VerifyDyncast<PDBSymbolLabel>(PDB_SymType::Label);
+  VerifyDyncast<PDBSymbolPublicSymbol>(PDB_SymType::PublicSymbol);
+  VerifyDyncast<PDBSymbolTypeUDT>(PDB_SymType::UDT);
+  VerifyDyncast<PDBSymbolTypeEnum>(PDB_SymType::Enum);
+  VerifyDyncast<PDBSymbolTypeFunctionSig>(PDB_SymType::FunctionSig);
+  VerifyDyncast<PDBSymbolTypePointer>(PDB_SymType::PointerType);
+  VerifyDyncast<PDBSymbolTypeArray>(PDB_SymType::ArrayType);
+  VerifyDyncast<PDBSymbolTypeBuiltin>(PDB_SymType::BuiltinType);
+  VerifyDyncast<PDBSymbolTypeTypedef>(PDB_SymType::Typedef);
+  VerifyDyncast<PDBSymbolTypeBaseClass>(PDB_SymType::BaseClass);
+  VerifyDyncast<PDBSymbolTypeFriend>(PDB_SymType::Friend);
+  VerifyDyncast<PDBSymbolTypeFunctionArg>(PDB_SymType::FunctionArg);
+  VerifyDyncast<PDBSymbolFuncDebugStart>(PDB_SymType::FuncDebugStart);
+  VerifyDyncast<PDBSymbolFuncDebugEnd>(PDB_SymType::FuncDebugEnd);
+  VerifyDyncast<PDBSymbolUsingNamespace>(PDB_SymType::UsingNamespace);
+  VerifyDyncast<PDBSymbolTypeVTableShape>(PDB_SymType::VTableShape);
+  VerifyDyncast<PDBSymbolTypeVTable>(PDB_SymType::VTable);
+  VerifyDyncast<PDBSymbolCustom>(PDB_SymType::Custom);
+  VerifyDyncast<PDBSymbolThunk>(PDB_SymType::Thunk);
+  VerifyDyncast<PDBSymbolTypeCustom>(PDB_SymType::CustomType);
+  VerifyDyncast<PDBSymbolTypeManaged>(PDB_SymType::ManagedType);
+  VerifyDyncast<PDBSymbolTypeDimension>(PDB_SymType::Dimension);
+
+  VerifyUnknownDyncasts();
+}
+
+} // end anonymous namespace