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/MC/TargetRegistry.h" 12 #include "llvm/Support/raw_ostream.h" 13 #include "llvm/TargetParser/Host.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.UseInitArray = true; 22 } 23 24 Expected<JITTargetMachineBuilder> JITTargetMachineBuilder::detectHost() { 25 JITTargetMachineBuilder TMBuilder((Triple(sys::getProcessTriple()))); 26 27 // Retrieve host CPU name and sub-target features and add them to builder. 28 // Relocation model, code model and codegen opt level are kept to default 29 // values. 30 llvm::StringMap<bool> FeatureMap; 31 llvm::sys::getHostCPUFeatures(FeatureMap); 32 for (auto &Feature : FeatureMap) 33 TMBuilder.getFeatures().AddFeature(Feature.first(), Feature.second); 34 35 TMBuilder.setCPU(std::string(llvm::sys::getHostCPUName())); 36 37 return TMBuilder; 38 } 39 40 Expected<std::unique_ptr<TargetMachine>> 41 JITTargetMachineBuilder::createTargetMachine() { 42 43 std::string ErrMsg; 44 auto *TheTarget = TargetRegistry::lookupTarget(TT.getTriple(), ErrMsg); 45 if (!TheTarget) 46 return make_error<StringError>(std::move(ErrMsg), inconvertibleErrorCode()); 47 48 if (!TheTarget->hasJIT()) 49 return make_error<StringError>("Target has no JIT support", 50 inconvertibleErrorCode()); 51 52 auto *TM = 53 TheTarget->createTargetMachine(TT.getTriple(), CPU, Features.getString(), 54 Options, RM, CM, OptLevel, /*JIT*/ true); 55 if (!TM) 56 return make_error<StringError>("Could not allocate target machine", 57 inconvertibleErrorCode()); 58 59 return std::unique_ptr<TargetMachine>(TM); 60 } 61 62 JITTargetMachineBuilder &JITTargetMachineBuilder::addFeatures( 63 const std::vector<std::string> &FeatureVec) { 64 for (const auto &F : FeatureVec) 65 Features.AddFeature(F); 66 return *this; 67 } 68 69 #ifndef NDEBUG 70 void JITTargetMachineBuilderPrinter::print(raw_ostream &OS) const { 71 OS << Indent << "{\n" 72 << Indent << " Triple = \"" << JTMB.TT.str() << "\"\n" 73 << Indent << " CPU = \"" << JTMB.CPU << "\"\n" 74 << Indent << " Features = \"" << JTMB.Features.getString() << "\"\n" 75 << Indent << " Options = <not-printable>\n" 76 << Indent << " Relocation Model = "; 77 78 if (JTMB.RM) { 79 switch (*JTMB.RM) { 80 case Reloc::Static: 81 OS << "Static"; 82 break; 83 case Reloc::PIC_: 84 OS << "PIC_"; 85 break; 86 case Reloc::DynamicNoPIC: 87 OS << "DynamicNoPIC"; 88 break; 89 case Reloc::ROPI: 90 OS << "ROPI"; 91 break; 92 case Reloc::RWPI: 93 OS << "RWPI"; 94 break; 95 case Reloc::ROPI_RWPI: 96 OS << "ROPI_RWPI"; 97 break; 98 } 99 } else 100 OS << "unspecified (will use target default)"; 101 102 OS << "\n" 103 << Indent << " Code Model = "; 104 105 if (JTMB.CM) { 106 switch (*JTMB.CM) { 107 case CodeModel::Tiny: 108 OS << "Tiny"; 109 break; 110 case CodeModel::Small: 111 OS << "Small"; 112 break; 113 case CodeModel::Kernel: 114 OS << "Kernel"; 115 break; 116 case CodeModel::Medium: 117 OS << "Medium"; 118 break; 119 case CodeModel::Large: 120 OS << "Large"; 121 break; 122 } 123 } else 124 OS << "unspecified (will use target default)"; 125 126 OS << "\n" 127 << Indent << " Optimization Level = "; 128 switch (JTMB.OptLevel) { 129 case CodeGenOpt::None: 130 OS << "None"; 131 break; 132 case CodeGenOpt::Less: 133 OS << "Less"; 134 break; 135 case CodeGenOpt::Default: 136 OS << "Default"; 137 break; 138 case CodeGenOpt::Aggressive: 139 OS << "Aggressive"; 140 break; 141 } 142 143 OS << "\n" << Indent << "}\n"; 144 } 145 #endif // NDEBUG 146 147 } // End namespace orc. 148 } // End namespace llvm. 149