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 for (const auto &Feature : llvm::sys::getHostCPUFeatures()) 31 TMBuilder.getFeatures().AddFeature(Feature.first(), Feature.second); 32 33 TMBuilder.setCPU(std::string(llvm::sys::getHostCPUName())); 34 35 return TMBuilder; 36 } 37 38 Expected<std::unique_ptr<TargetMachine>> 39 JITTargetMachineBuilder::createTargetMachine() { 40 41 std::string ErrMsg; 42 auto *TheTarget = TargetRegistry::lookupTarget(TT, ErrMsg); 43 if (!TheTarget) 44 return make_error<StringError>(std::move(ErrMsg), inconvertibleErrorCode()); 45 46 if (!TheTarget->hasJIT()) 47 return make_error<StringError>("Target has no JIT support", 48 inconvertibleErrorCode()); 49 50 auto *TM = TheTarget->createTargetMachine( 51 TT, CPU, Features.getString(), 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 #ifndef NDEBUG 67 void JITTargetMachineBuilderPrinter::print(raw_ostream &OS) const { 68 OS << Indent << "{\n" 69 << Indent << " Triple = \"" << JTMB.TT.str() << "\"\n" 70 << Indent << " CPU = \"" << JTMB.CPU << "\"\n" 71 << Indent << " Features = \"" << JTMB.Features.getString() << "\"\n" 72 << Indent << " Options = <not-printable>\n" 73 << Indent << " Relocation Model = "; 74 75 if (JTMB.RM) { 76 switch (*JTMB.RM) { 77 case Reloc::Static: 78 OS << "Static"; 79 break; 80 case Reloc::PIC_: 81 OS << "PIC_"; 82 break; 83 case Reloc::DynamicNoPIC: 84 OS << "DynamicNoPIC"; 85 break; 86 case Reloc::ROPI: 87 OS << "ROPI"; 88 break; 89 case Reloc::RWPI: 90 OS << "RWPI"; 91 break; 92 case Reloc::ROPI_RWPI: 93 OS << "ROPI_RWPI"; 94 break; 95 } 96 } else 97 OS << "unspecified (will use target default)"; 98 99 OS << "\n" 100 << Indent << " Code Model = "; 101 102 if (JTMB.CM) { 103 switch (*JTMB.CM) { 104 case CodeModel::Tiny: 105 OS << "Tiny"; 106 break; 107 case CodeModel::Small: 108 OS << "Small"; 109 break; 110 case CodeModel::Kernel: 111 OS << "Kernel"; 112 break; 113 case CodeModel::Medium: 114 OS << "Medium"; 115 break; 116 case CodeModel::Large: 117 OS << "Large"; 118 break; 119 } 120 } else 121 OS << "unspecified (will use target default)"; 122 123 OS << "\n" 124 << Indent << " Optimization Level = "; 125 switch (JTMB.OptLevel) { 126 case CodeGenOptLevel::None: 127 OS << "None"; 128 break; 129 case CodeGenOptLevel::Less: 130 OS << "Less"; 131 break; 132 case CodeGenOptLevel::Default: 133 OS << "Default"; 134 break; 135 case CodeGenOptLevel::Aggressive: 136 OS << "Aggressive"; 137 break; 138 } 139 140 OS << "\n" << Indent << "}\n"; 141 } 142 #endif // NDEBUG 143 144 } // End namespace orc. 145 } // End namespace llvm. 146