1 //===-- CompileUtils.h - Utilities for compiling IR in the JIT --*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // Contains utilities for compiling IR to object files. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_EXECUTIONENGINE_ORC_COMPILEUTILS_H 15 #define LLVM_EXECUTIONENGINE_ORC_COMPILEUTILS_H 16 17 #include "llvm/ExecutionEngine/ObjectMemoryBuffer.h" 18 #include "llvm/IR/LegacyPassManager.h" 19 #include "llvm/MC/MCContext.h" 20 #include "llvm/Object/ObjectFile.h" 21 #include "llvm/Target/TargetMachine.h" 22 23 namespace llvm { 24 namespace orc { 25 26 /// @brief Simple compile functor: Takes a single IR module and returns an 27 /// ObjectFile. 28 class SimpleCompiler { 29 public: 30 /// @brief Construct a simple compile functor with the given target. SimpleCompiler(TargetMachine & TM)31 SimpleCompiler(TargetMachine &TM) : TM(TM) {} 32 33 /// @brief Compile a Module to an ObjectFile. operator()34 object::OwningBinary<object::ObjectFile> operator()(Module &M) const { 35 SmallVector<char, 0> ObjBufferSV; 36 raw_svector_ostream ObjStream(ObjBufferSV); 37 38 legacy::PassManager PM; 39 MCContext *Ctx; 40 if (TM.addPassesToEmitMC(PM, Ctx, ObjStream)) 41 llvm_unreachable("Target does not support MC emission."); 42 PM.run(M); 43 std::unique_ptr<MemoryBuffer> ObjBuffer( 44 new ObjectMemoryBuffer(std::move(ObjBufferSV))); 45 ErrorOr<std::unique_ptr<object::ObjectFile>> Obj = 46 object::ObjectFile::createObjectFile(ObjBuffer->getMemBufferRef()); 47 // TODO: Actually report errors helpfully. 48 typedef object::OwningBinary<object::ObjectFile> OwningObj; 49 if (Obj) 50 return OwningObj(std::move(*Obj), std::move(ObjBuffer)); 51 return OwningObj(nullptr, nullptr); 52 } 53 54 private: 55 TargetMachine &TM; 56 }; 57 58 } // End namespace orc. 59 } // End namespace llvm. 60 61 #endif // LLVM_EXECUTIONENGINE_ORC_COMPILEUTILS_H 62