CompileUtils.cpp
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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 {
IRMaterializationUnit::ManglingOptions
irManglingOptionsFromTargetOptions(const TargetOptions &Opts) {
IRMaterializationUnit::ManglingOptions MO;
MO.EmulatedTLS = Opts.EmulatedTLS;
return MO;
}
/// Compile a Module to an ObjectFile.
Expected<SimpleCompiler::CompileResult> SimpleCompiler::operator()(Module &M) {
CompileResult CachedObject = tryToLoadFromObjectCache(M);
if (CachedObject)
return std::move(CachedObject);
SmallVector<char, 0> ObjBufferSV;
{
raw_svector_ostream ObjStream(ObjBufferSV);
legacy::PassManager PM;
MCContext *Ctx;
if (TM.addPassesToEmitMC(PM, Ctx, ObjStream))
return make_error<StringError>("Target does not support MC emission",
inconvertibleErrorCode());
PM.run(M);
}
auto ObjBuffer = std::make_unique<SmallVectorMemoryBuffer>(
std::move(ObjBufferSV), M.getModuleIdentifier() + "-jitted-objectbuffer");
auto Obj = object::ObjectFile::createObjectFile(ObjBuffer->getMemBufferRef());
if (!Obj)
return Obj.takeError();
notifyObjectCompiled(M, *ObjBuffer);
return std::move(ObjBuffer);
}
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)
: IRCompiler(irManglingOptionsFromTargetOptions(JTMB.getOptions())),
JTMB(std::move(JTMB)), ObjCache(ObjCache) {}
Expected<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