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/Host.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 void JITTargetMachineBuilderPrinter::print(raw_ostream &OS) const { 69 OS << Indent << "{\n" 70 << Indent << " Triple = \"" << JTMB.TT.str() << "\"\n" 71 << Indent << " CPU = \"" << JTMB.CPU << "\"\n" 72 << Indent << " Features = \"" << JTMB.Features.getString() << "\"\n" 73 << Indent << " Options = <not-printable>\n" 74 << Indent << " Relocation Model = "; 75 76 if (JTMB.RM) { 77 switch (*JTMB.RM) { 78 case Reloc::Static: 79 OS << "Static"; 80 break; 81 case Reloc::PIC_: 82 OS << "PIC_"; 83 break; 84 case Reloc::DynamicNoPIC: 85 OS << "DynamicNoPIC"; 86 break; 87 case Reloc::ROPI: 88 OS << "ROPI"; 89 break; 90 case Reloc::RWPI: 91 OS << "RWPI"; 92 break; 93 case Reloc::ROPI_RWPI: 94 OS << "ROPI_RWPI"; 95 break; 96 } 97 } else 98 OS << "unspecified (will use target default)"; 99 100 OS << "\n" 101 << Indent << " Code Model = "; 102 103 if (JTMB.CM) { 104 switch (*JTMB.CM) { 105 case CodeModel::Tiny: 106 OS << "Tiny"; 107 break; 108 case CodeModel::Small: 109 OS << "Small"; 110 break; 111 case CodeModel::Kernel: 112 OS << "Kernel"; 113 break; 114 case CodeModel::Medium: 115 OS << "Medium"; 116 break; 117 case CodeModel::Large: 118 OS << "Large"; 119 break; 120 } 121 } else 122 OS << "unspecified (will use target default)"; 123 124 OS << "\n" 125 << Indent << " Optimization Level = "; 126 switch (JTMB.OptLevel) { 127 case CodeGenOpt::None: 128 OS << "None"; 129 break; 130 case CodeGenOpt::Less: 131 OS << "Less"; 132 break; 133 case CodeGenOpt::Default: 134 OS << "Default"; 135 break; 136 case CodeGenOpt::Aggressive: 137 OS << "Aggressive"; 138 break; 139 } 140 141 OS << "\n" << Indent << "}\n"; 142 } 143 #endif // NDEBUG 144 145 } // End namespace orc. 146 } // End namespace llvm. 147