From bab175ec4b075c8076ba14c762900392533f6ee4 Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Mon, 2 Jan 2017 19:18:08 +0000
Subject: Vendor import of clang trunk r290819:
 https://llvm.org/svn/llvm-project/cfe/trunk@290819

---
 lib/CodeGen/ObjectFilePCHContainerOperations.cpp | 37 +++++++++++++-----------
 1 file changed, 20 insertions(+), 17 deletions(-)

(limited to 'lib/CodeGen/ObjectFilePCHContainerOperations.cpp')

diff --git a/lib/CodeGen/ObjectFilePCHContainerOperations.cpp b/lib/CodeGen/ObjectFilePCHContainerOperations.cpp
index de40e4121124b..baf7811eedaf5 100644
--- a/lib/CodeGen/ObjectFilePCHContainerOperations.cpp
+++ b/lib/CodeGen/ObjectFilePCHContainerOperations.cpp
@@ -312,27 +312,30 @@ ObjectFilePCHContainerWriter::CreatePCHContainerGenerator(
       CI, MainFileName, OutputFileName, std::move(OS), Buffer);
 }
 
-void ObjectFilePCHContainerReader::ExtractPCH(
-    llvm::MemoryBufferRef Buffer, llvm::BitstreamReader &StreamFile) const {
-  if (auto OF = llvm::object::ObjectFile::createObjectFile(Buffer)) {
-    auto *Obj = OF.get().get();
-    bool IsCOFF = isa<llvm::object::COFFObjectFile>(Obj);
+StringRef
+ObjectFilePCHContainerReader::ExtractPCH(llvm::MemoryBufferRef Buffer) const {
+  StringRef PCH;
+  auto OFOrErr = llvm::object::ObjectFile::createObjectFile(Buffer);
+  if (OFOrErr) {
+    auto &OF = OFOrErr.get();
+    bool IsCOFF = isa<llvm::object::COFFObjectFile>(*OF);
     // Find the clang AST section in the container.
-    for (auto &Section : OF->get()->sections()) {
+    for (auto &Section : OF->sections()) {
       StringRef Name;
       Section.getName(Name);
-      if ((!IsCOFF && Name == "__clangast") ||
-          ( IsCOFF && Name ==   "clangast")) {
-        StringRef Buf;
-        Section.getContents(Buf);
-        StreamFile.init((const unsigned char *)Buf.begin(),
-                        (const unsigned char *)Buf.end());
-        return;
+      if ((!IsCOFF && Name == "__clangast") || (IsCOFF && Name == "clangast")) {
+        Section.getContents(PCH);
+        return PCH;
       }
     }
   }
-
-  // As a fallback, treat the buffer as a raw AST.
-  StreamFile.init((const unsigned char *)Buffer.getBufferStart(),
-                  (const unsigned char *)Buffer.getBufferEnd());
+  handleAllErrors(OFOrErr.takeError(), [&](const llvm::ErrorInfoBase &EIB) {
+    if (EIB.convertToErrorCode() ==
+        llvm::object::object_error::invalid_file_type)
+      // As a fallback, treat the buffer as a raw AST.
+      PCH = Buffer.getBuffer();
+    else
+      EIB.log(llvm::errs());
+  });
+  return PCH;
 }
-- 
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