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 namespace orc {
23 
24 /// A layer that applies a transform to emitted modules.
25 /// The transform function is responsible for locking the ThreadSafeContext
26 /// before operating on the module.
27 class IRTransformLayer : public IRLayer {
28 public:
29   using TransformFunction = unique_function<Expected<ThreadSafeModule>(
30       ThreadSafeModule, MaterializationResponsibility &R)>;
31 
32   IRTransformLayer(ExecutionSession &ES, IRLayer &BaseLayer,
33                    TransformFunction Transform = identityTransform);
34 
35   void setTransform(TransformFunction Transform) {
36     this->Transform = std::move(Transform);
37   }
38 
39   void emit(std::unique_ptr<MaterializationResponsibility> R,
40             ThreadSafeModule TSM) override;
41 
42   static ThreadSafeModule identityTransform(ThreadSafeModule TSM,
43                                             MaterializationResponsibility &R) {
44     return TSM;
45   }
46 
47 private:
48   IRLayer &BaseLayer;
49   TransformFunction Transform;
50 };
51 
52 } // end namespace orc
53 } // end namespace llvm
54 
55 #endif // LLVM_EXECUTIONENGINE_ORC_IRTRANSFORMLAYER_H
56