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//===-- CompileUtils.h - Utilities for compiling IR in the JIT --*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Contains utilities for compiling IR to object files.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_EXECUTIONENGINE_ORC_COMPILEUTILS_H
#define LLVM_EXECUTIONENGINE_ORC_COMPILEUTILS_H
#include "llvm/ExecutionEngine/ObjectMemoryBuffer.h"
#include "llvm/IR/LegacyPassManager.h"
#include "llvm/MC/MCContext.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Target/TargetMachine.h"
namespace llvm {
namespace orc {
/// @brief Simple compile functor: Takes a single IR module and returns an
/// ObjectFile.
class SimpleCompiler {
public:
/// @brief Construct a simple compile functor with the given target.
SimpleCompiler(TargetMachine &TM) : TM(TM) {}
/// @brief Compile a Module to an ObjectFile.
object::OwningBinary<object::ObjectFile> operator()(Module &M) const {
SmallVector<char, 0> ObjBufferSV;
raw_svector_ostream ObjStream(ObjBufferSV);
legacy::PassManager PM;
MCContext *Ctx;
if (TM.addPassesToEmitMC(PM, Ctx, ObjStream))
llvm_unreachable("Target does not support MC emission.");
PM.run(M);
ObjStream.flush();
std::unique_ptr<MemoryBuffer> ObjBuffer(
new ObjectMemoryBuffer(std::move(ObjBufferSV)));
ErrorOr<std::unique_ptr<object::ObjectFile>> Obj =
object::ObjectFile::createObjectFile(ObjBuffer->getMemBufferRef());
// TODO: Actually report errors helpfully.
typedef object::OwningBinary<object::ObjectFile> OwningObj;
if (Obj)
return OwningObj(std::move(*Obj), std::move(ObjBuffer));
return OwningObj(nullptr, nullptr);
}
private:
TargetMachine &TM;
};
} // End namespace orc.
} // End namespace llvm.
#endif // LLVM_EXECUTIONENGINE_ORC_COMPILEUTILS_H
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