1 //===- IRTransformLayer.h - Run all IR through a functor --------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // Run all IR passed in through a user supplied functor.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef LLVM_EXECUTIONENGINE_ORC_IRTRANSFORMLAYER_H
14 #define LLVM_EXECUTIONENGINE_ORC_IRTRANSFORMLAYER_H
15 
16 #include "llvm/ADT/FunctionExtras.h"
17 #include "llvm/ExecutionEngine/JITSymbol.h"
18 #include "llvm/ExecutionEngine/Orc/Layer.h"
19 #include <memory>
20 
21 namespace llvm {
22 class Module;
23 namespace orc {
24 
25 /// A layer that applies a transform to emitted modules.
26 /// The transform function is responsible for locking the ThreadSafeContext
27 /// before operating on the module.
28 class IRTransformLayer : public IRLayer {
29 public:
30   using TransformFunction = unique_function<Expected<ThreadSafeModule>(
31       ThreadSafeModule, MaterializationResponsibility &R)>;
32 
33   IRTransformLayer(ExecutionSession &ES, IRLayer &BaseLayer,
34                    TransformFunction Transform = identityTransform);
35 
36   void setTransform(TransformFunction Transform) {
37     this->Transform = std::move(Transform);
38   }
39 
40   void emit(std::unique_ptr<MaterializationResponsibility> R,
41             ThreadSafeModule TSM) override;
42 
43   static ThreadSafeModule identityTransform(ThreadSafeModule TSM,
44                                             MaterializationResponsibility &R) {
45     return TSM;
46   }
47 
48 private:
49   IRLayer &BaseLayer;
50   TransformFunction Transform;
51 };
52 
53 } // end namespace orc
54 } // end namespace llvm
55 
56 #endif // LLVM_EXECUTIONENGINE_ORC_IRTRANSFORMLAYER_H
57