1 //===-- ThreadSafeModule.cpp - Thread safe Module, Context, and Utilities 2 //h-===// 3 // 4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5 // See https://llvm.org/LICENSE.txt for license information. 6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "llvm/ExecutionEngine/Orc/ThreadSafeModule.h" 11 #include "llvm/Bitcode/BitcodeReader.h" 12 #include "llvm/Bitcode/BitcodeWriter.h" 13 #include "llvm/Transforms/Utils/Cloning.h" 14 15 namespace llvm { 16 namespace orc { 17 18 ThreadSafeModule cloneToNewContext(const ThreadSafeModule &TSM, 19 GVPredicate ShouldCloneDef, 20 GVModifier UpdateClonedDefSource) { 21 assert(TSM && "Can not clone null module"); 22 23 if (!ShouldCloneDef) 24 ShouldCloneDef = [](const GlobalValue &) { return true; }; 25 26 return TSM.withModuleDo([&](Module &M) { 27 SmallVector<char, 1> ClonedModuleBuffer; 28 29 { 30 std::set<GlobalValue *> ClonedDefsInSrc; 31 ValueToValueMapTy VMap; 32 auto Tmp = CloneModule(M, VMap, [&](const GlobalValue *GV) { 33 if (ShouldCloneDef(*GV)) { 34 ClonedDefsInSrc.insert(const_cast<GlobalValue *>(GV)); 35 return true; 36 } 37 return false; 38 }); 39 40 if (UpdateClonedDefSource) 41 for (auto *GV : ClonedDefsInSrc) 42 UpdateClonedDefSource(*GV); 43 44 BitcodeWriter BCWriter(ClonedModuleBuffer); 45 46 BCWriter.writeModule(*Tmp); 47 BCWriter.writeSymtab(); 48 BCWriter.writeStrtab(); 49 } 50 51 MemoryBufferRef ClonedModuleBufferRef( 52 StringRef(ClonedModuleBuffer.data(), ClonedModuleBuffer.size()), 53 "cloned module buffer"); 54 ThreadSafeContext NewTSCtx(std::make_unique<LLVMContext>()); 55 56 auto ClonedModule = cantFail( 57 parseBitcodeFile(ClonedModuleBufferRef, *NewTSCtx.getContext())); 58 ClonedModule->setModuleIdentifier(M.getName()); 59 return ThreadSafeModule(std::move(ClonedModule), std::move(NewTSCtx)); 60 }); 61 } 62 63 } // end namespace orc 64 } // end namespace llvm 65