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//===------ CompileUtils.cpp - Utilities for compiling IR in the JIT ------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "llvm/ExecutionEngine/Orc/CompileUtils.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ExecutionEngine/ObjectCache.h"
#include "llvm/IR/LegacyPassManager.h"
#include "llvm/IR/Module.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SmallVectorMemoryBuffer.h"
#include "llvm/Target/TargetMachine.h"
#include <algorithm>
namespace llvm {
namespace orc {
/// Compile a Module to an ObjectFile.
SimpleCompiler::CompileResult SimpleCompiler::operator()(Module &M) {
CompileResult CachedObject = tryToLoadFromObjectCache(M);
if (CachedObject)
return CachedObject;
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);
}
auto ObjBuffer = llvm::make_unique<SmallVectorMemoryBuffer>(
std::move(ObjBufferSV),
"<in memory object compiled from " + M.getModuleIdentifier() + ">");
auto Obj = object::ObjectFile::createObjectFile(ObjBuffer->getMemBufferRef());
if (Obj) {
notifyObjectCompiled(M, *ObjBuffer);
return std::move(ObjBuffer);
}
// TODO: Actually report errors helpfully.
consumeError(Obj.takeError());
return nullptr;
}
SimpleCompiler::CompileResult
SimpleCompiler::tryToLoadFromObjectCache(const Module &M) {
if (!ObjCache)
return CompileResult();
return ObjCache->getObject(&M);
}
void SimpleCompiler::notifyObjectCompiled(const Module &M,
const MemoryBuffer &ObjBuffer) {
if (ObjCache)
ObjCache->notifyObjectCompiled(&M, ObjBuffer.getMemBufferRef());
}
ConcurrentIRCompiler::ConcurrentIRCompiler(JITTargetMachineBuilder JTMB,
ObjectCache *ObjCache)
: JTMB(std::move(JTMB)), ObjCache(ObjCache) {}
std::unique_ptr<MemoryBuffer> ConcurrentIRCompiler::operator()(Module &M) {
auto TM = cantFail(JTMB.createTargetMachine());
SimpleCompiler C(*TM, ObjCache);
return C(M);
}
} // end namespace orc
} // end namespace llvm
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