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 Options.UseInitArray = true; 23 } 24 25 Expected<JITTargetMachineBuilder> JITTargetMachineBuilder::detectHost() { 26 // FIXME: getProcessTriple is bogus. It returns the host LLVM was compiled on, 27 // rather than a valid triple for the current process. 28 JITTargetMachineBuilder TMBuilder((Triple(sys::getProcessTriple()))); 29 30 // Retrieve host CPU name and sub-target features and add them to builder. 31 // Relocation model, code model and codegen opt level are kept to default 32 // values. 33 llvm::StringMap<bool> FeatureMap; 34 llvm::sys::getHostCPUFeatures(FeatureMap); 35 for (auto &Feature : FeatureMap) 36 TMBuilder.getFeatures().AddFeature(Feature.first(), Feature.second); 37 38 TMBuilder.setCPU(std::string(llvm::sys::getHostCPUName())); 39 40 return TMBuilder; 41 } 42 43 Expected<std::unique_ptr<TargetMachine>> 44 JITTargetMachineBuilder::createTargetMachine() { 45 46 std::string ErrMsg; 47 auto *TheTarget = TargetRegistry::lookupTarget(TT.getTriple(), ErrMsg); 48 if (!TheTarget) 49 return make_error<StringError>(std::move(ErrMsg), inconvertibleErrorCode()); 50 51 if (!TheTarget->hasJIT()) 52 return make_error<StringError>("Target has no JIT support", 53 inconvertibleErrorCode()); 54 55 auto *TM = 56 TheTarget->createTargetMachine(TT.getTriple(), CPU, Features.getString(), 57 Options, RM, CM, OptLevel, /*JIT*/ true); 58 if (!TM) 59 return make_error<StringError>("Could not allocate target machine", 60 inconvertibleErrorCode()); 61 62 return std::unique_ptr<TargetMachine>(TM); 63 } 64 65 JITTargetMachineBuilder &JITTargetMachineBuilder::addFeatures( 66 const std::vector<std::string> &FeatureVec) { 67 for (const auto &F : FeatureVec) 68 Features.AddFeature(F); 69 return *this; 70 } 71 72 #ifndef NDEBUG 73 void JITTargetMachineBuilderPrinter::print(raw_ostream &OS) const { 74 OS << Indent << "{\n" 75 << Indent << " Triple = \"" << JTMB.TT.str() << "\"\n" 76 << Indent << " CPU = \"" << JTMB.CPU << "\"\n" 77 << Indent << " Features = \"" << JTMB.Features.getString() << "\"\n" 78 << Indent << " Options = <not-printable>\n" 79 << Indent << " Relocation Model = "; 80 81 if (JTMB.RM) { 82 switch (*JTMB.RM) { 83 case Reloc::Static: 84 OS << "Static"; 85 break; 86 case Reloc::PIC_: 87 OS << "PIC_"; 88 break; 89 case Reloc::DynamicNoPIC: 90 OS << "DynamicNoPIC"; 91 break; 92 case Reloc::ROPI: 93 OS << "ROPI"; 94 break; 95 case Reloc::RWPI: 96 OS << "RWPI"; 97 break; 98 case Reloc::ROPI_RWPI: 99 OS << "ROPI_RWPI"; 100 break; 101 } 102 } else 103 OS << "unspecified (will use target default)"; 104 105 OS << "\n" 106 << Indent << " Code Model = "; 107 108 if (JTMB.CM) { 109 switch (*JTMB.CM) { 110 case CodeModel::Tiny: 111 OS << "Tiny"; 112 break; 113 case CodeModel::Small: 114 OS << "Small"; 115 break; 116 case CodeModel::Kernel: 117 OS << "Kernel"; 118 break; 119 case CodeModel::Medium: 120 OS << "Medium"; 121 break; 122 case CodeModel::Large: 123 OS << "Large"; 124 break; 125 } 126 } else 127 OS << "unspecified (will use target default)"; 128 129 OS << "\n" 130 << Indent << " Optimization Level = "; 131 switch (JTMB.OptLevel) { 132 case CodeGenOpt::None: 133 OS << "None"; 134 break; 135 case CodeGenOpt::Less: 136 OS << "Less"; 137 break; 138 case CodeGenOpt::Default: 139 OS << "Default"; 140 break; 141 case CodeGenOpt::Aggressive: 142 OS << "Aggressive"; 143 break; 144 } 145 146 OS << "\n" << Indent << "}\n"; 147 } 148 #endif // NDEBUG 149 150 } // End namespace orc. 151 } // End namespace llvm. 152