Merge "Update prebuilt Clang to r353983." into p9.0HEADp9.0-backupp9.0

1 files changed, 113 insertions, 0 deletions

diff --git a/clang-r353983/include/llvm/ExecutionEngine/Orc/ObjectTransformLayer.h b/clang-r353983/include/llvm/ExecutionEngine/Orc/ObjectTransformLayer.h
new file mode 100644
index 00000000..de4603f9
--- /dev/null
+++ b/clang-r353983/include/llvm/ExecutionEngine/Orc/ObjectTransformLayer.h
@@ -0,0 +1,113 @@
+//===- ObjectTransformLayer.h - Run all objects through functor -*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// Run all objects passed in through a user supplied functor.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_EXECUTIONENGINE_ORC_OBJECTTRANSFORMLAYER_H
+#define LLVM_EXECUTIONENGINE_ORC_OBJECTTRANSFORMLAYER_H
+
+#include "llvm/ExecutionEngine/JITSymbol.h"
+#include "llvm/ExecutionEngine/Orc/Layer.h"
+#include <algorithm>
+#include <memory>
+#include <string>
+
+namespace llvm {
+namespace orc {
+
+class ObjectTransformLayer : public ObjectLayer {
+public:
+  using TransformFunction =
+      std::function<Expected<std::unique_ptr<MemoryBuffer>>(
+          std::unique_ptr<MemoryBuffer>)>;
+
+  ObjectTransformLayer(ExecutionSession &ES, ObjectLayer &BaseLayer,
+                       TransformFunction Transform);
+
+  void emit(MaterializationResponsibility R,
+            std::unique_ptr<MemoryBuffer> O) override;
+
+private:
+  ObjectLayer &BaseLayer;
+  TransformFunction Transform;
+};
+
+/// Object mutating layer.
+///
+///   This layer accepts sets of ObjectFiles (via addObject). It
+/// immediately applies the user supplied functor to each object, then adds
+/// the set of transformed objects to the layer below.
+template <typename BaseLayerT, typename TransformFtor>
+class LegacyObjectTransformLayer {
+public:
+  /// Construct an ObjectTransformLayer with the given BaseLayer
+  LegacyObjectTransformLayer(BaseLayerT &BaseLayer,
+                             TransformFtor Transform = TransformFtor())
+      : BaseLayer(BaseLayer), Transform(std::move(Transform)) {}
+
+  /// Apply the transform functor to each object in the object set, then
+  ///        add the resulting set of objects to the base layer, along with the
+  ///        memory manager and symbol resolver.
+  ///
+  /// @return A handle for the added objects.
+  template <typename ObjectPtr> Error addObject(VModuleKey K, ObjectPtr Obj) {
+    return BaseLayer.addObject(std::move(K), Transform(std::move(Obj)));
+  }
+
+  /// Remove the object set associated with the VModuleKey K.
+  Error removeObject(VModuleKey K) { return BaseLayer.removeObject(K); }
+
+  /// 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.
+  JITSymbol findSymbol(const std::string &Name, bool ExportedSymbolsOnly) {
+    return BaseLayer.findSymbol(Name, ExportedSymbolsOnly);
+  }
+
+  /// Get the address of the given symbol in the context of the set of
+  ///        objects represented by the VModuleKey K. This call is forwarded to
+  ///        the base layer's implementation.
+  /// @param K The VModuleKey associated with the object set to search in.
+  /// @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 is found in the
+  ///         given object set.
+  JITSymbol findSymbolIn(VModuleKey K, const std::string &Name,
+                         bool ExportedSymbolsOnly) {
+    return BaseLayer.findSymbolIn(K, Name, ExportedSymbolsOnly);
+  }
+
+  /// Immediately emit and finalize the object set represented by the
+  ///        given VModuleKey K.
+  Error emitAndFinalize(VModuleKey K) { return BaseLayer.emitAndFinalize(K); }
+
+  /// Map section addresses for the objects associated with the
+  /// VModuleKey K.
+  void mapSectionAddress(VModuleKey K, const void *LocalAddress,
+                         JITTargetAddress TargetAddr) {
+    BaseLayer.mapSectionAddress(K, LocalAddress, TargetAddr);
+  }
+
+  /// Access the transform functor directly.
+  TransformFtor &getTransform() { return Transform; }
+
+  /// Access the mumate functor directly.
+  const TransformFtor &getTransform() const { return Transform; }
+
+private:
+  BaseLayerT &BaseLayer;
+  TransformFtor Transform;
+};
+
+} // end namespace orc
+} // end namespace llvm
+
+#endif // LLVM_EXECUTIONENGINE_ORC_OBJECTTRANSFORMLAYER_H