1*0b57cec5SDimitry Andric //===-- ThreadSafeModule.cpp - Thread safe Module, Context, and Utilities
2*0b57cec5SDimitry Andric //h-===//
3*0b57cec5SDimitry Andric //
4*0b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5*0b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information.
6*0b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7*0b57cec5SDimitry Andric //
8*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===//
9*0b57cec5SDimitry Andric
10*0b57cec5SDimitry Andric #include "llvm/ExecutionEngine/Orc/ThreadSafeModule.h"
11*0b57cec5SDimitry Andric #include "llvm/Bitcode/BitcodeReader.h"
12*0b57cec5SDimitry Andric #include "llvm/Bitcode/BitcodeWriter.h"
13*0b57cec5SDimitry Andric #include "llvm/Transforms/Utils/Cloning.h"
14*0b57cec5SDimitry Andric
15*0b57cec5SDimitry Andric namespace llvm {
16*0b57cec5SDimitry Andric namespace orc {
17*0b57cec5SDimitry Andric
cloneToNewContext(const ThreadSafeModule & TSM,GVPredicate ShouldCloneDef,GVModifier UpdateClonedDefSource)18*0b57cec5SDimitry Andric ThreadSafeModule cloneToNewContext(const ThreadSafeModule &TSM,
19*0b57cec5SDimitry Andric GVPredicate ShouldCloneDef,
20*0b57cec5SDimitry Andric GVModifier UpdateClonedDefSource) {
21*0b57cec5SDimitry Andric assert(TSM && "Can not clone null module");
22*0b57cec5SDimitry Andric
23*0b57cec5SDimitry Andric if (!ShouldCloneDef)
24*0b57cec5SDimitry Andric ShouldCloneDef = [](const GlobalValue &) { return true; };
25*0b57cec5SDimitry Andric
26*0b57cec5SDimitry Andric return TSM.withModuleDo([&](Module &M) {
27*0b57cec5SDimitry Andric SmallVector<char, 1> ClonedModuleBuffer;
28*0b57cec5SDimitry Andric
29*0b57cec5SDimitry Andric {
30*0b57cec5SDimitry Andric std::set<GlobalValue *> ClonedDefsInSrc;
31*0b57cec5SDimitry Andric ValueToValueMapTy VMap;
32*0b57cec5SDimitry Andric auto Tmp = CloneModule(M, VMap, [&](const GlobalValue *GV) {
33*0b57cec5SDimitry Andric if (ShouldCloneDef(*GV)) {
34*0b57cec5SDimitry Andric ClonedDefsInSrc.insert(const_cast<GlobalValue *>(GV));
35*0b57cec5SDimitry Andric return true;
36*0b57cec5SDimitry Andric }
37*0b57cec5SDimitry Andric return false;
38*0b57cec5SDimitry Andric });
39*0b57cec5SDimitry Andric
40*0b57cec5SDimitry Andric if (UpdateClonedDefSource)
41*0b57cec5SDimitry Andric for (auto *GV : ClonedDefsInSrc)
42*0b57cec5SDimitry Andric UpdateClonedDefSource(*GV);
43*0b57cec5SDimitry Andric
44*0b57cec5SDimitry Andric BitcodeWriter BCWriter(ClonedModuleBuffer);
45*0b57cec5SDimitry Andric
46*0b57cec5SDimitry Andric BCWriter.writeModule(*Tmp);
47*0b57cec5SDimitry Andric BCWriter.writeSymtab();
48*0b57cec5SDimitry Andric BCWriter.writeStrtab();
49*0b57cec5SDimitry Andric }
50*0b57cec5SDimitry Andric
51*0b57cec5SDimitry Andric MemoryBufferRef ClonedModuleBufferRef(
52*0b57cec5SDimitry Andric StringRef(ClonedModuleBuffer.data(), ClonedModuleBuffer.size()),
53*0b57cec5SDimitry Andric "cloned module buffer");
54*0b57cec5SDimitry Andric ThreadSafeContext NewTSCtx(std::make_unique<LLVMContext>());
55*0b57cec5SDimitry Andric
56*0b57cec5SDimitry Andric auto ClonedModule = cantFail(
57*0b57cec5SDimitry Andric parseBitcodeFile(ClonedModuleBufferRef, *NewTSCtx.getContext()));
58*0b57cec5SDimitry Andric ClonedModule->setModuleIdentifier(M.getName());
59*0b57cec5SDimitry Andric return ThreadSafeModule(std::move(ClonedModule), std::move(NewTSCtx));
60*0b57cec5SDimitry Andric });
61*0b57cec5SDimitry Andric }
62*0b57cec5SDimitry Andric
63*0b57cec5SDimitry Andric } // end namespace orc
64*0b57cec5SDimitry Andric } // end namespace llvm
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