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/ADT/StringMap.h" 12 #include "llvm/MC/TargetRegistry.h" 13 #include "llvm/Support/raw_ostream.h" 14 #include "llvm/TargetParser/Host.h" 15 16 namespace llvm { 17 namespace orc { 18 19 JITTargetMachineBuilder::JITTargetMachineBuilder(Triple TT) 20 : TT(std::move(TT)) { 21 Options.EmulatedTLS = true; 22 Options.UseInitArray = true; 23 } 24 25 Expected<JITTargetMachineBuilder> JITTargetMachineBuilder::detectHost() { 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 for (const auto &Feature : llvm::sys::getHostCPUFeatures()) 32 TMBuilder.getFeatures().AddFeature(Feature.first(), Feature.second); 33 34 TMBuilder.setCPU(std::string(llvm::sys::getHostCPUName())); 35 36 return TMBuilder; 37 } 38 39 Expected<std::unique_ptr<TargetMachine>> 40 JITTargetMachineBuilder::createTargetMachine() { 41 42 std::string ErrMsg; 43 auto *TheTarget = TargetRegistry::lookupTarget(TT.getTriple(), ErrMsg); 44 if (!TheTarget) 45 return make_error<StringError>(std::move(ErrMsg), inconvertibleErrorCode()); 46 47 if (!TheTarget->hasJIT()) 48 return make_error<StringError>("Target has no JIT support", 49 inconvertibleErrorCode()); 50 51 auto *TM = 52 TheTarget->createTargetMachine(TT.getTriple(), CPU, Features.getString(), 53 Options, RM, CM, OptLevel, /*JIT*/ true); 54 if (!TM) 55 return make_error<StringError>("Could not allocate target machine", 56 inconvertibleErrorCode()); 57 58 return std::unique_ptr<TargetMachine>(TM); 59 } 60 61 JITTargetMachineBuilder &JITTargetMachineBuilder::addFeatures( 62 const std::vector<std::string> &FeatureVec) { 63 for (const auto &F : FeatureVec) 64 Features.AddFeature(F); 65 return *this; 66 } 67 68 #ifndef NDEBUG 69 void JITTargetMachineBuilderPrinter::print(raw_ostream &OS) const { 70 OS << Indent << "{\n" 71 << Indent << " Triple = \"" << JTMB.TT.str() << "\"\n" 72 << Indent << " CPU = \"" << JTMB.CPU << "\"\n" 73 << Indent << " Features = \"" << JTMB.Features.getString() << "\"\n" 74 << Indent << " Options = <not-printable>\n" 75 << Indent << " Relocation Model = "; 76 77 if (JTMB.RM) { 78 switch (*JTMB.RM) { 79 case Reloc::Static: 80 OS << "Static"; 81 break; 82 case Reloc::PIC_: 83 OS << "PIC_"; 84 break; 85 case Reloc::DynamicNoPIC: 86 OS << "DynamicNoPIC"; 87 break; 88 case Reloc::ROPI: 89 OS << "ROPI"; 90 break; 91 case Reloc::RWPI: 92 OS << "RWPI"; 93 break; 94 case Reloc::ROPI_RWPI: 95 OS << "ROPI_RWPI"; 96 break; 97 } 98 } else 99 OS << "unspecified (will use target default)"; 100 101 OS << "\n" 102 << Indent << " Code Model = "; 103 104 if (JTMB.CM) { 105 switch (*JTMB.CM) { 106 case CodeModel::Tiny: 107 OS << "Tiny"; 108 break; 109 case CodeModel::Small: 110 OS << "Small"; 111 break; 112 case CodeModel::Kernel: 113 OS << "Kernel"; 114 break; 115 case CodeModel::Medium: 116 OS << "Medium"; 117 break; 118 case CodeModel::Large: 119 OS << "Large"; 120 break; 121 } 122 } else 123 OS << "unspecified (will use target default)"; 124 125 OS << "\n" 126 << Indent << " Optimization Level = "; 127 switch (JTMB.OptLevel) { 128 case CodeGenOptLevel::None: 129 OS << "None"; 130 break; 131 case CodeGenOptLevel::Less: 132 OS << "Less"; 133 break; 134 case CodeGenOptLevel::Default: 135 OS << "Default"; 136 break; 137 case CodeGenOptLevel::Aggressive: 138 OS << "Aggressive"; 139 break; 140 } 141 142 OS << "\n" << Indent << "}\n"; 143 } 144 #endif // NDEBUG 145 146 } // End namespace orc. 147 } // End namespace llvm. 148