1 //===----- JITTargetMachineBuilder.cpp - Build TargetMachines for JIT -----===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "llvm/ExecutionEngine/Orc/JITTargetMachineBuilder.h" 10 11 #include "llvm/Support/Host.h" 12 #include "llvm/Support/TargetRegistry.h" 13 14 namespace llvm { 15 namespace orc { 16 17 JITTargetMachineBuilder::JITTargetMachineBuilder(Triple TT) 18 : TT(std::move(TT)) { 19 Options.EmulatedTLS = true; 20 Options.ExplicitEmulatedTLS = true; 21 } 22 23 Expected<JITTargetMachineBuilder> JITTargetMachineBuilder::detectHost() { 24 // FIXME: getProcessTriple is bogus. It returns the host LLVM was compiled on, 25 // rather than a valid triple for the current process. 26 JITTargetMachineBuilder TMBuilder((Triple(sys::getProcessTriple()))); 27 28 // Retrieve host CPU name and sub-target features and add them to builder. 29 // Relocation model, code model and codegen opt level are kept to default 30 // values. 31 llvm::SubtargetFeatures SubtargetFeatures; 32 llvm::StringMap<bool> FeatureMap; 33 llvm::sys::getHostCPUFeatures(FeatureMap); 34 for (auto &Feature : FeatureMap) 35 SubtargetFeatures.AddFeature(Feature.first(), Feature.second); 36 37 TMBuilder.setCPU(llvm::sys::getHostCPUName()); 38 TMBuilder.addFeatures(SubtargetFeatures.getFeatures()); 39 40 return TMBuilder; 41 } 42 43 Expected<std::unique_ptr<TargetMachine>> 44 JITTargetMachineBuilder::createTargetMachine() { 45 46 std::string ErrMsg; 47 auto *TheTarget = TargetRegistry::lookupTarget(TT.getTriple(), ErrMsg); 48 if (!TheTarget) 49 return make_error<StringError>(std::move(ErrMsg), inconvertibleErrorCode()); 50 51 auto *TM = 52 TheTarget->createTargetMachine(TT.getTriple(), CPU, Features.getString(), 53 Options, RM, CM, OptLevel, /*JIT*/ true); 54 if (!TM) 55 return make_error<StringError>("Could not allocate target machine", 56 inconvertibleErrorCode()); 57 58 return std::unique_ptr<TargetMachine>(TM); 59 } 60 61 JITTargetMachineBuilder &JITTargetMachineBuilder::addFeatures( 62 const std::vector<std::string> &FeatureVec) { 63 for (const auto &F : FeatureVec) 64 Features.AddFeature(F); 65 return *this; 66 } 67 68 } // End namespace orc. 69 } // End namespace llvm. 70