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::StringMap<bool> FeatureMap; 32 llvm::sys::getHostCPUFeatures(FeatureMap); 33 for (auto &Feature : FeatureMap) 34 TMBuilder.getFeatures().AddFeature(Feature.first(), Feature.second); 35 36 TMBuilder.setCPU(llvm::sys::getHostCPUName()); 37 38 return TMBuilder; 39 } 40 41 Expected<std::unique_ptr<TargetMachine>> 42 JITTargetMachineBuilder::createTargetMachine() { 43 44 std::string ErrMsg; 45 auto *TheTarget = TargetRegistry::lookupTarget(TT.getTriple(), ErrMsg); 46 if (!TheTarget) 47 return make_error<StringError>(std::move(ErrMsg), inconvertibleErrorCode()); 48 49 auto *TM = 50 TheTarget->createTargetMachine(TT.getTriple(), CPU, Features.getString(), 51 Options, RM, CM, OptLevel, /*JIT*/ true); 52 if (!TM) 53 return make_error<StringError>("Could not allocate target machine", 54 inconvertibleErrorCode()); 55 56 return std::unique_ptr<TargetMachine>(TM); 57 } 58 59 JITTargetMachineBuilder &JITTargetMachineBuilder::addFeatures( 60 const std::vector<std::string> &FeatureVec) { 61 for (const auto &F : FeatureVec) 62 Features.AddFeature(F); 63 return *this; 64 } 65 66 } // End namespace orc. 67 } // End namespace llvm. 68