Provide DIA implementation of DebugInfoPDB.

This implements DebugInfoPDB when the DIA SDK is present on the system.
Specifically, this means that the following conditions are met:
  1) You are building on Windows.
  2) You are building with MSVC.
  3) Visual Studio did not corrupt the installation of DIA due to a
     known issue with side-by-side installations of VS2012 and VS2013.
If all of these conditions are true, you will be able to pass a value
of PDB_Reader::DIA to PDB::createPdbReader().

There are no tests for this yet, as any test will be in the form of a
lit test which tests the llvm-pdbdump.exe, which still needs to be
rewritten in terms of this library.

llvm-svn: 228747

1 files changed, 8 insertions, 0 deletions

diff --git a/llvm/lib/DebugInfo/PDB/PDB.cpp b/llvm/lib/DebugInfo/PDB/PDB.cpp
index e80beee..6aea237 100644
--- a/llvm/lib/DebugInfo/PDB/PDB.cpp
+++ b/llvm/lib/DebugInfo/PDB/PDB.cpp
@@ -7,15 +7,23 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/Config/config.h"
+
 #include "llvm/ADT/StringRef.h"
 
 #include "llvm/DebugInfo/PDB/PDB.h"
 #include "llvm/DebugInfo/PDB/IPDBSession.h"
+#if HAVE_DIA_SDK
+#include "llvm/DebugInfo/PDB/DIA/DIASession.h"
+#endif
 
 using namespace llvm;
 
 std::unique_ptr<IPDBSession> llvm::createPDBReader(PDB_ReaderType Type,
                                                    StringRef Path) {
   // Create the correct concrete instance type based on the value of Type.
+#if HAVE_DIA_SDK
+  return std::unique_ptr<DIASession>(DIASession::createFromPdb(Path));
+#endif
   return nullptr;
 }