1 files changed, 13 insertions, 11 deletions

diff --git a/lib/Frontend/PrecompiledPreamble.cpp b/lib/Frontend/PrecompiledPreamble.cpp
index 276a9676eaa9..ced32c670288 100644
--- a/lib/Frontend/PrecompiledPreamble.cpp
+++ b/lib/Frontend/PrecompiledPreamble.cpp
@@ -12,6 +12,7 @@
 
 #include "clang/Frontend/PrecompiledPreamble.h"
 #include "clang/AST/DeclObjC.h"
+#include "clang/Basic/LangStandard.h"
 #include "clang/Basic/TargetInfo.h"
 #include "clang/Frontend/CompilerInstance.h"
 #include "clang/Frontend/CompilerInvocation.h"
@@ -26,11 +27,10 @@
 #include "llvm/Config/llvm-config.h"
 #include "llvm/Support/CrashRecoveryContext.h"
 #include "llvm/Support/FileSystem.h"
-#include "llvm/Support/Mutex.h"
-#include "llvm/Support/MutexGuard.h"
 #include "llvm/Support/Process.h"
 #include "llvm/Support/VirtualFileSystem.h"
 #include <limits>
+#include <mutex>
 #include <utility>
 
 using namespace clang;
@@ -95,7 +95,7 @@ public:
   void removeFile(StringRef File);
 
 private:
-  llvm::sys::SmartMutex<false> Mutex;
+  std::mutex Mutex;
   llvm::StringSet<> Files;
 };
 
@@ -105,20 +105,20 @@ TemporaryFiles &TemporaryFiles::getInstance() {
 }
 
 TemporaryFiles::~TemporaryFiles() {
-  llvm::MutexGuard Guard(Mutex);
+  std::lock_guard<std::mutex> Guard(Mutex);
   for (const auto &File : Files)
     llvm::sys::fs::remove(File.getKey());
 }
 
 void TemporaryFiles::addFile(StringRef File) {
-  llvm::MutexGuard Guard(Mutex);
+  std::lock_guard<std::mutex> Guard(Mutex);
   auto IsInserted = Files.insert(File).second;
   (void)IsInserted;
   assert(IsInserted && "File has already been added");
 }
 
 void TemporaryFiles::removeFile(StringRef File) {
-  llvm::MutexGuard Guard(Mutex);
+  std::lock_guard<std::mutex> Guard(Mutex);
   auto WasPresent = Files.erase(File);
   (void)WasPresent;
   assert(WasPresent && "File was not tracked");
@@ -202,7 +202,7 @@ PrecompilePreambleAction::CreateASTConsumer(CompilerInstance &CI,
 
   std::unique_ptr<llvm::raw_ostream> OS;
   if (InMemStorage) {
-    OS = llvm::make_unique<llvm::raw_string_ostream>(*InMemStorage);
+    OS = std::make_unique<llvm::raw_string_ostream>(*InMemStorage);
   } else {
     std::string OutputFile;
     OS = GeneratePCHAction::CreateOutputFile(CI, InFile, OutputFile);
@@ -213,7 +213,7 @@ PrecompilePreambleAction::CreateASTConsumer(CompilerInstance &CI,
   if (!CI.getFrontendOpts().RelocatablePCH)
     Sysroot.clear();
 
-  return llvm::make_unique<PrecompilePreambleConsumer>(
+  return std::make_unique<PrecompilePreambleConsumer>(
       *this, CI.getPreprocessor(), CI.getModuleCache(), Sysroot, std::move(OS));
 }
 
@@ -303,7 +303,7 @@ llvm::ErrorOr<PrecompiledPreamble> PrecompiledPreamble::Build(
       Clang->getFrontendOpts().Inputs[0].getKind().getFormat() !=
           InputKind::Source ||
       Clang->getFrontendOpts().Inputs[0].getKind().getLanguage() ==
-          InputKind::LLVM_IR) {
+          Language::LLVM_IR) {
     return BuildPreambleError::BadInputs;
   }
 
@@ -369,9 +369,11 @@ llvm::ErrorOr<PrecompiledPreamble> PrecompiledPreamble::Build(
 
   SourceManager &SourceMgr = Clang->getSourceManager();
   for (auto &Filename : PreambleDepCollector->getDependencies()) {
-    const FileEntry *File = Clang->getFileManager().getFile(Filename);
-    if (!File || File == SourceMgr.getFileEntryForID(SourceMgr.getMainFileID()))
+    auto FileOrErr = Clang->getFileManager().getFile(Filename);
+    if (!FileOrErr ||
+        *FileOrErr == SourceMgr.getFileEntryForID(SourceMgr.getMainFileID()))
       continue;
+    auto File = *FileOrErr;
     if (time_t ModTime = File->getModificationTime()) {
       FilesInPreamble[File->getName()] =
           PrecompiledPreamble::PreambleFileHash::createForFile(File->getSize(),