From 71d5a2540a98c81f5bcaeb48805e0e2881f530ef Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Sun, 16 Apr 2017 16:01:22 +0000
Subject: Vendor import of llvm trunk r300422:
 https://llvm.org/svn/llvm-project/llvm/trunk@300422

---
 lib/Object/ModuleSummaryIndexObjectFile.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'lib/Object/ModuleSummaryIndexObjectFile.cpp')

diff --git a/lib/Object/ModuleSummaryIndexObjectFile.cpp b/lib/Object/ModuleSummaryIndexObjectFile.cpp
index 11ace84b9ceb..de1ddab88fd4 100644
--- a/lib/Object/ModuleSummaryIndexObjectFile.cpp
+++ b/lib/Object/ModuleSummaryIndexObjectFile.cpp
@@ -96,13 +96,18 @@ ModuleSummaryIndexObjectFile::create(MemoryBufferRef Object) {
 // Parse the module summary index out of an IR file and return the summary
 // index object if found, or nullptr if not.
 Expected<std::unique_ptr<ModuleSummaryIndex>>
-llvm::getModuleSummaryIndexForFile(StringRef Path) {
+llvm::getModuleSummaryIndexForFile(StringRef Path, StringRef Identifier) {
   ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
       MemoryBuffer::getFileOrSTDIN(Path);
   std::error_code EC = FileOrErr.getError();
   if (EC)
     return errorCodeToError(EC);
-  MemoryBufferRef BufferRef = (FileOrErr.get())->getMemBufferRef();
+  std::unique_ptr<MemoryBuffer> MemBuffer = std::move(FileOrErr.get());
+  // If Identifier is non-empty, use it as the buffer identifier, which
+  // will become the module path in the index.
+  if (Identifier.empty())
+    Identifier = MemBuffer->getBufferIdentifier();
+  MemoryBufferRef BufferRef(MemBuffer->getBuffer(), Identifier);
   if (IgnoreEmptyThinLTOIndexFile && !BufferRef.getBufferSize())
     return nullptr;
   Expected<std::unique_ptr<object::ModuleSummaryIndexObjectFile>> ObjOrErr =
-- 
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