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 #include "llvm/Support/raw_ostream.h" 14 15 namespace llvm { 16 namespace orc { 17 18 JITTargetMachineBuilder::JITTargetMachineBuilder(Triple TT) 19 : TT(std::move(TT)) { 20 Options.EmulatedTLS = true; 21 Options.ExplicitEmulatedTLS = true; 22 } 23 24 Expected<JITTargetMachineBuilder> JITTargetMachineBuilder::detectHost() { 25 // FIXME: getProcessTriple is bogus. It returns the host LLVM was compiled on, 26 // rather than a valid triple for the current process. 27 JITTargetMachineBuilder TMBuilder((Triple(sys::getProcessTriple()))); 28 29 // Retrieve host CPU name and sub-target features and add them to builder. 30 // Relocation model, code model and codegen opt level are kept to default 31 // values. 32 llvm::StringMap<bool> FeatureMap; 33 llvm::sys::getHostCPUFeatures(FeatureMap); 34 for (auto &Feature : FeatureMap) 35 TMBuilder.getFeatures().AddFeature(Feature.first(), Feature.second); 36 37 TMBuilder.setCPU(std::string(llvm::sys::getHostCPUName())); 38 39 return TMBuilder; 40 } 41 42 Expected<std::unique_ptr<TargetMachine>> 43 JITTargetMachineBuilder::createTargetMachine() { 44 45 std::string ErrMsg; 46 auto *TheTarget = TargetRegistry::lookupTarget(TT.getTriple(), ErrMsg); 47 if (!TheTarget) 48 return make_error<StringError>(std::move(ErrMsg), inconvertibleErrorCode()); 49 50 auto *TM = 51 TheTarget->createTargetMachine(TT.getTriple(), CPU, Features.getString(), 52 Options, RM, CM, OptLevel, /*JIT*/ true); 53 if (!TM) 54 return make_error<StringError>("Could not allocate target machine", 55 inconvertibleErrorCode()); 56 57 return std::unique_ptr<TargetMachine>(TM); 58 } 59 60 JITTargetMachineBuilder &JITTargetMachineBuilder::addFeatures( 61 const std::vector<std::string> &FeatureVec) { 62 for (const auto &F : FeatureVec) 63 Features.AddFeature(F); 64 return *this; 65 } 66 67 #ifndef NDEBUG 68 raw_ostream &operator<<(raw_ostream &OS, const JITTargetMachineBuilder &JTMB) { 69 OS << "{ Triple = \"" << JTMB.TT.str() << "\", CPU = \"" << JTMB.CPU 70 << "\", Options = <not-printable>, Relocation Model = "; 71 72 if (JTMB.RM) { 73 switch (*JTMB.RM) { 74 case Reloc::Static: 75 OS << "Static"; 76 break; 77 case Reloc::PIC_: 78 OS << "PIC_"; 79 break; 80 case Reloc::DynamicNoPIC: 81 OS << "DynamicNoPIC"; 82 break; 83 case Reloc::ROPI: 84 OS << "ROPI"; 85 break; 86 case Reloc::RWPI: 87 OS << "RWPI"; 88 break; 89 case Reloc::ROPI_RWPI: 90 OS << "ROPI_RWPI"; 91 break; 92 } 93 } else 94 OS << "unspecified"; 95 96 OS << ", Code Model = "; 97 98 if (JTMB.CM) { 99 switch (*JTMB.CM) { 100 case CodeModel::Tiny: 101 OS << "Tiny"; 102 break; 103 case CodeModel::Small: 104 OS << "Small"; 105 break; 106 case CodeModel::Kernel: 107 OS << "Kernel"; 108 break; 109 case CodeModel::Medium: 110 OS << "Medium"; 111 break; 112 case CodeModel::Large: 113 OS << "Large"; 114 break; 115 } 116 } else 117 OS << "unspecified"; 118 119 OS << ", Optimization Level = "; 120 switch (JTMB.OptLevel) { 121 case CodeGenOpt::None: 122 OS << "None"; 123 break; 124 case CodeGenOpt::Less: 125 OS << "Less"; 126 break; 127 case CodeGenOpt::Default: 128 OS << "Default"; 129 break; 130 case CodeGenOpt::Aggressive: 131 OS << "Aggressive"; 132 break; 133 } 134 135 OS << " }"; 136 return OS; 137 } 138 #endif // NDEBUG 139 140 } // End namespace orc. 141 } // End namespace llvm. 142