ThreadSafeModule.cpp
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//===-- ThreadSafeModule.cpp - Thread safe Module, Context, and Utilities
//h-===//
//
// 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/ThreadSafeModule.h"
#include "llvm/Bitcode/BitcodeReader.h"
#include "llvm/Bitcode/BitcodeWriter.h"
#include "llvm/Transforms/Utils/Cloning.h"
namespace llvm {
namespace orc {
ThreadSafeModule cloneToNewContext(const ThreadSafeModule &TSM,
GVPredicate ShouldCloneDef,
GVModifier UpdateClonedDefSource) {
assert(TSM && "Can not clone null module");
if (!ShouldCloneDef)
ShouldCloneDef = [](const GlobalValue &) { return true; };
return TSM.withModuleDo([&](Module &M) {
SmallVector<char, 1> ClonedModuleBuffer;
{
std::set<GlobalValue *> ClonedDefsInSrc;
ValueToValueMapTy VMap;
auto Tmp = CloneModule(M, VMap, [&](const GlobalValue *GV) {
if (ShouldCloneDef(*GV)) {
ClonedDefsInSrc.insert(const_cast<GlobalValue *>(GV));
return true;
}
return false;
});
if (UpdateClonedDefSource)
for (auto *GV : ClonedDefsInSrc)
UpdateClonedDefSource(*GV);
BitcodeWriter BCWriter(ClonedModuleBuffer);
BCWriter.writeModule(*Tmp);
BCWriter.writeSymtab();
BCWriter.writeStrtab();
}
MemoryBufferRef ClonedModuleBufferRef(
StringRef(ClonedModuleBuffer.data(), ClonedModuleBuffer.size()),
"cloned module buffer");
ThreadSafeContext NewTSCtx(std::make_unique<LLVMContext>());
auto ClonedModule = cantFail(
parseBitcodeFile(ClonedModuleBufferRef, *NewTSCtx.getContext()));
ClonedModule->setModuleIdentifier(M.getName());
return ThreadSafeModule(std::move(ClonedModule), std::move(NewTSCtx));
});
}
} // end namespace orc
} // end namespace llvm