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
15namespace llvm {
16namespace orc {
17
18JITTargetMachineBuilder::JITTargetMachineBuilder(Triple TT)
19 : TT(std::move(TT)) {
20 Options.EmulatedTLS = true;
21 Options.UseInitArray = true;
22}
23
24Expected<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 llvm::StringMap<bool> FeatureMap;
31 llvm::sys::getHostCPUFeatures(Features&: FeatureMap);
32 for (auto &Feature : FeatureMap)
33 TMBuilder.getFeatures().AddFeature(String: Feature.first(), Enable: Feature.second);
34
35 TMBuilder.setCPU(std::string(llvm::sys::getHostCPUName()));
36
37 return TMBuilder;
38}
39
40Expected<std::unique_ptr<TargetMachine>>
41JITTargetMachineBuilder::createTargetMachine() {
42
43 std::string ErrMsg;
44 auto *TheTarget = TargetRegistry::lookupTarget(Triple: TT.getTriple(), Error&: ErrMsg);
45 if (!TheTarget)
46 return make_error<StringError>(Args: std::move(ErrMsg), Args: inconvertibleErrorCode());
47
48 if (!TheTarget->hasJIT())
49 return make_error<StringError>(Args: "Target has no JIT support",
50 Args: inconvertibleErrorCode());
51
52 auto *TM =
53 TheTarget->createTargetMachine(TT: TT.getTriple(), CPU, Features: Features.getString(),
54 Options, RM, CM, OL: OptLevel, /*JIT*/ true);
55 if (!TM)
56 return make_error<StringError>(Args: "Could not allocate target machine",
57 Args: inconvertibleErrorCode());
58
59 return std::unique_ptr<TargetMachine>(TM);
60}
61
62JITTargetMachineBuilder &JITTargetMachineBuilder::addFeatures(
63 const std::vector<std::string> &FeatureVec) {
64 for (const auto &F : FeatureVec)
65 Features.AddFeature(String: F);
66 return *this;
67}
68
69#ifndef NDEBUG
70void JITTargetMachineBuilderPrinter::print(raw_ostream &OS) const {
71 OS << Indent << "{\n"
72 << Indent << " Triple = \"" << JTMB.TT.str() << "\"\n"
73 << Indent << " CPU = \"" << JTMB.CPU << "\"\n"
74 << Indent << " Features = \"" << JTMB.Features.getString() << "\"\n"
75 << Indent << " Options = <not-printable>\n"
76 << Indent << " Relocation Model = ";
77
78 if (JTMB.RM) {
79 switch (*JTMB.RM) {
80 case Reloc::Static:
81 OS << "Static";
82 break;
83 case Reloc::PIC_:
84 OS << "PIC_";
85 break;
86 case Reloc::DynamicNoPIC:
87 OS << "DynamicNoPIC";
88 break;
89 case Reloc::ROPI:
90 OS << "ROPI";
91 break;
92 case Reloc::RWPI:
93 OS << "RWPI";
94 break;
95 case Reloc::ROPI_RWPI:
96 OS << "ROPI_RWPI";
97 break;
98 }
99 } else
100 OS << "unspecified (will use target default)";
101
102 OS << "\n"
103 << Indent << " Code Model = ";
104
105 if (JTMB.CM) {
106 switch (*JTMB.CM) {
107 case CodeModel::Tiny:
108 OS << "Tiny";
109 break;
110 case CodeModel::Small:
111 OS << "Small";
112 break;
113 case CodeModel::Kernel:
114 OS << "Kernel";
115 break;
116 case CodeModel::Medium:
117 OS << "Medium";
118 break;
119 case CodeModel::Large:
120 OS << "Large";
121 break;
122 }
123 } else
124 OS << "unspecified (will use target default)";
125
126 OS << "\n"
127 << Indent << " Optimization Level = ";
128 switch (JTMB.OptLevel) {
129 case CodeGenOptLevel::None:
130 OS << "None";
131 break;
132 case CodeGenOptLevel::Less:
133 OS << "Less";
134 break;
135 case CodeGenOptLevel::Default:
136 OS << "Default";
137 break;
138 case CodeGenOptLevel::Aggressive:
139 OS << "Aggressive";
140 break;
141 }
142
143 OS << "\n" << Indent << "}\n";
144}
145#endif // NDEBUG
146
147} // End namespace orc.
148} // End namespace llvm.
149

source code of llvm/lib/ExecutionEngine/Orc/JITTargetMachineBuilder.cpp