Update clang to r339409.

Change-Id: I800772d2d838223be1f6b40d490c4591b937fca2
diff --git a/linux-x64/clang/include/llvm/ExecutionEngine/Orc/IRCompileLayer.h b/linux-x64/clang/include/llvm/ExecutionEngine/Orc/IRCompileLayer.h
index a7f9416..ad64815 100644
--- a/linux-x64/clang/include/llvm/ExecutionEngine/Orc/IRCompileLayer.h
+++ b/linux-x64/clang/include/llvm/ExecutionEngine/Orc/IRCompileLayer.h
@@ -16,8 +16,9 @@
 
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ExecutionEngine/JITSymbol.h"
-#include "llvm/ExecutionEngine/Orc/Core.h"
+#include "llvm/ExecutionEngine/Orc/Layer.h"
 #include "llvm/Support/Error.h"
+#include "llvm/Support/MemoryBuffer.h"
 #include <memory>
 #include <string>
 
@@ -27,7 +28,30 @@
 
 namespace orc {
 
-/// @brief Eager IR compiling layer.
+class IRCompileLayer2 : public IRLayer {
+public:
+  using CompileFunction =
+      std::function<Expected<std::unique_ptr<MemoryBuffer>>(Module &)>;
+
+  using NotifyCompiledFunction =
+      std::function<void(VModuleKey K, std::unique_ptr<Module>)>;
+
+  IRCompileLayer2(ExecutionSession &ES, ObjectLayer &BaseLayer,
+                  CompileFunction Compile);
+
+  void setNotifyCompiled(NotifyCompiledFunction NotifyCompiled);
+
+  void emit(MaterializationResponsibility R, VModuleKey K,
+            std::unique_ptr<Module> M) override;
+
+private:
+  mutable std::mutex IRLayerMutex;
+  ObjectLayer &BaseLayer;
+  CompileFunction Compile;
+  NotifyCompiledFunction NotifyCompiled = NotifyCompiledFunction();
+};
+
+/// Eager IR compiling layer.
 ///
 ///   This layer immediately compiles each IR module added via addModule to an
 /// object file and adds this module file to the layer below, which must
@@ -35,11 +59,11 @@
 template <typename BaseLayerT, typename CompileFtor>
 class IRCompileLayer {
 public:
-  /// @brief Callback type for notifications when modules are compiled.
+  /// Callback type for notifications when modules are compiled.
   using NotifyCompiledCallback =
       std::function<void(VModuleKey K, std::unique_ptr<Module>)>;
 
-  /// @brief Construct an IRCompileLayer with the given BaseLayer, which must
+  /// Construct an IRCompileLayer with the given BaseLayer, which must
   ///        implement the ObjectLayer concept.
   IRCompileLayer(
       BaseLayerT &BaseLayer, CompileFtor Compile,
@@ -47,15 +71,15 @@
       : BaseLayer(BaseLayer), Compile(std::move(Compile)),
         NotifyCompiled(std::move(NotifyCompiled)) {}
 
-  /// @brief Get a reference to the compiler functor.
+  /// Get a reference to the compiler functor.
   CompileFtor& getCompiler() { return Compile; }
 
-  /// @brief (Re)set the NotifyCompiled callback.
+  /// (Re)set the NotifyCompiled callback.
   void setNotifyCompiled(NotifyCompiledCallback NotifyCompiled) {
     this->NotifyCompiled = std::move(NotifyCompiled);
   }
 
-  /// @brief Compile the module, and add the resulting object to the base layer
+  /// Compile the module, and add the resulting object to the base layer
   ///        along with the given memory manager and symbol resolver.
   Error addModule(VModuleKey K, std::unique_ptr<Module> M) {
     if (auto Err = BaseLayer.addObject(std::move(K), Compile(*M)))
@@ -65,10 +89,10 @@
     return Error::success();
   }
 
-  /// @brief Remove the module associated with the VModuleKey K.
+  /// Remove the module associated with the VModuleKey K.
   Error removeModule(VModuleKey K) { return BaseLayer.removeObject(K); }
 
-  /// @brief Search for the given named symbol.
+  /// Search for the given named symbol.
   /// @param Name The name of the symbol to search for.
   /// @param ExportedSymbolsOnly If true, search only for exported symbols.
   /// @return A handle for the given named symbol, if it exists.
@@ -76,7 +100,7 @@
     return BaseLayer.findSymbol(Name, ExportedSymbolsOnly);
   }
 
-  /// @brief Get the address of the given symbol in compiled module represented
+  /// Get the address of the given symbol in compiled module represented
   ///        by the handle H. This call is forwarded to the base layer's
   ///        implementation.
   /// @param K The VModuleKey for the module to search in.
@@ -89,7 +113,7 @@
     return BaseLayer.findSymbolIn(K, Name, ExportedSymbolsOnly);
   }
 
-  /// @brief Immediately emit and finalize the module represented by the given
+  /// Immediately emit and finalize the module represented by the given
   ///        handle.
   /// @param K The VModuleKey for the module to emit/finalize.
   Error emitAndFinalize(VModuleKey K) { return BaseLayer.emitAndFinalize(K); }