vendor/llvm/llvm-trunk-r238337

1 files changed, 101 insertions, 0 deletions

diff --git a/include/llvm/ExecutionEngine/Orc/IRTransformLayer.h b/include/llvm/ExecutionEngine/Orc/IRTransformLayer.h
new file mode 100644
index 000000000000..4dabb9a41494
--- /dev/null
+++ b/include/llvm/ExecutionEngine/Orc/IRTransformLayer.h
@@ -0,0 +1,101 @@
+//===----- IRTransformLayer.h - Run all IR through a functor ----*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Run all IR passed in through a user supplied functor.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_EXECUTIONENGINE_ORC_IRTRANSFORMLAYER_H
+#define LLVM_EXECUTIONENGINE_ORC_IRTRANSFORMLAYER_H
+
+#include "JITSymbol.h"
+
+namespace llvm {
+namespace orc {
+
+/// @brief IR mutating layer.
+///
+///   This layer accepts sets of LLVM IR Modules (via addModuleSet). It
+/// immediately applies the user supplied functor to each module, then adds
+/// the set of transformed modules to the layer below.
+template <typename BaseLayerT, typename TransformFtor>
+class IRTransformLayer {
+public:
+  /// @brief Handle to a set of added modules.
+  typedef typename BaseLayerT::ModuleSetHandleT ModuleSetHandleT;
+
+  /// @brief Construct an IRTransformLayer with the given BaseLayer
+  IRTransformLayer(BaseLayerT &BaseLayer,
+                   TransformFtor Transform = TransformFtor())
+    : BaseLayer(BaseLayer), Transform(std::move(Transform)) {}
+
+  /// @brief Apply the transform functor to each module in the module set, then
+  ///        add the resulting set of modules to the base layer, along with the
+  ///        memory manager and symbol resolver.
+  ///
+  /// @return A handle for the added modules.
+  template <typename ModuleSetT, typename MemoryManagerPtrT,
+            typename SymbolResolverPtrT>
+  ModuleSetHandleT addModuleSet(ModuleSetT Ms,
+                                MemoryManagerPtrT MemMgr,
+                                SymbolResolverPtrT Resolver) {
+
+    for (auto I = Ms.begin(), E = Ms.end(); I != E; ++I)
+      *I = Transform(std::move(*I));
+
+    return BaseLayer.addModuleSet(std::move(Ms), std::move(MemMgr),
+                                  std::move(Resolver));
+  }
+
+  /// @brief Remove the module set associated with the handle H.
+  void removeModuleSet(ModuleSetHandleT H) { BaseLayer.removeModuleSet(H); }
+
+  /// @brief 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);
+  }
+
+  /// @brief Get the address of the given symbol in the context of the set of
+  ///        modules represented by the handle H. This call is forwarded to the
+  ///        base layer's implementation.
+  /// @param H The handle for the module 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 module set.
+  JITSymbol findSymbolIn(ModuleSetHandleT H, const std::string &Name,
+                         bool ExportedSymbolsOnly) {
+    return BaseLayer.findSymbolIn(H, Name, ExportedSymbolsOnly);
+  }
+
+  /// @brief Immediately emit and finalize the module set represented by the
+  ///        given handle.
+  /// @param H Handle for module set to emit/finalize.
+  void emitAndFinalize(ModuleSetHandleT H) {
+    BaseLayer.emitAndFinalize(H);
+  }
+
+  /// @brief Access the transform functor directly.
+  TransformFtor& getTransform() { return Transform; }
+
+  /// @brief 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_IRTRANSFORMLAYER_H