IRTransformLayer.h

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//===- IRTransformLayer.h - Run all IR through a 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 IR passed in through a user supplied functor.
//
//===----------------------------------------------------------------------===//
 
#ifndef LLVM_EXECUTIONENGINE_ORC_IRTRANSFORMLAYER_H
#define LLVM_EXECUTIONENGINE_ORC_IRTRANSFORMLAYER_H
 
#include "llvm/ADT/FunctionExtras.h"
#include "llvm/ExecutionEngine/JITSymbol.h"
#include "llvm/ExecutionEngine/Orc/Layer.h"
#include <memory>
 
namespace llvm {
class Module;
namespace orc {
 
/// A layer that applies a transform to emitted modules.
/// The transform function is responsible for locking the ThreadSafeContext
/// before operating on the module.
class IRTransformLayer : public IRLayer {
public:
  using TransformFunction = unique_function<Expected<ThreadSafeModule>(
      ThreadSafeModule, MaterializationResponsibility &R)>;
 
  IRTransformLayer(ExecutionSession &ES, IRLayer &BaseLayer,
                   TransformFunction Transform = identityTransform);
 
  void setTransform(TransformFunction Transform) {
    this->Transform = std::move(Transform);
  }
 
  void emit(std::unique_ptr<MaterializationResponsibility> R,
            ThreadSafeModule TSM) override;
 
  static ThreadSafeModule identityTransform(ThreadSafeModule TSM,
                                            MaterializationResponsibility &R) {
    return TSM;
  }
 
private:
  IRLayer &BaseLayer;
  TransformFunction Transform;
};
 
} // end namespace orc
} // end namespace llvm
 
#endif // LLVM_EXECUTIONENGINE_ORC_IRTRANSFORMLAYER_H