1 files changed, 12 insertions, 4 deletions
diff --git a/llvm/lib/Support/SourceMgr.cpp b/llvm/lib/Support/SourceMgr.cpp
index 2eb2989b..42982b4 100644
--- a/llvm/lib/Support/SourceMgr.cpp
+++ b/llvm/lib/Support/SourceMgr.cpp
@@ -40,6 +40,17 @@ static const size_t TabStop = 8;
 unsigned SourceMgr::AddIncludeFile(const std::string &Filename,
                                    SMLoc IncludeLoc,
                                    std::string &IncludedFile) {
+  ErrorOr<std::unique_ptr<MemoryBuffer>> NewBufOrErr =
+      OpenIncludeFile(Filename, IncludedFile);
+  if (!NewBufOrErr)
+    return 0;
+
+  return AddNewSourceBuffer(std::move(*NewBufOrErr), IncludeLoc);
+}
+
+ErrorOr<std::unique_ptr<MemoryBuffer>>
+SourceMgr::OpenIncludeFile(const std::string &Filename,
+                           std::string &IncludedFile) {
   IncludedFile = Filename;
   ErrorOr<std::unique_ptr<MemoryBuffer>> NewBufOrErr =
       MemoryBuffer::getFile(IncludedFile);
@@ -52,10 +63,7 @@ unsigned SourceMgr::AddIncludeFile(const std::string &Filename,
     NewBufOrErr = MemoryBuffer::getFile(IncludedFile);
   }
 
-  if (!NewBufOrErr)
-    return 0;
-
-  return AddNewSourceBuffer(std::move(*NewBufOrErr), IncludeLoc);
+  return NewBufOrErr;
 }
 
 unsigned SourceMgr::FindBufferContainingLoc(SMLoc Loc) const {