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
JITTargetMachineBuilder(Triple TT)19 JITTargetMachineBuilder::JITTargetMachineBuilder(Triple TT)
20 : TT(std::move(TT)) {
21 Options.EmulatedTLS = true;
22 Options.UseInitArray = true;
23 }
24
detectHost()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>>
createTargetMachine()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
addFeatures(const std::vector<std::string> & FeatureVec)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
print(raw_ostream & OS) const69 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