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 for (const auto &Feature : llvm::sys::getHostCPUFeatures())
31 TMBuilder.getFeatures().AddFeature(String: Feature.first(), Enable: Feature.second);
32
33 TMBuilder.setCPU(std::string(llvm::sys::getHostCPUName()));
34
35 return TMBuilder;
36}
37
38Expected<std::unique_ptr<TargetMachine>>
39JITTargetMachineBuilder::createTargetMachine() {
40
41 std::string ErrMsg;
42 auto *TheTarget = TargetRegistry::lookupTarget(TheTriple: TT, Error&: ErrMsg);
43 if (!TheTarget)
44 return make_error<StringError>(Args: std::move(ErrMsg), Args: inconvertibleErrorCode());
45
46 if (!TheTarget->hasJIT())
47 return make_error<StringError>(Args: "Target has no JIT support",
48 Args: inconvertibleErrorCode());
49
50 auto *TM = TheTarget->createTargetMachine(
51 TT, CPU, Features: Features.getString(), Options, RM, CM, OL: OptLevel, /*JIT=*/true);
52 if (!TM)
53 return make_error<StringError>(Args: "Could not allocate target machine",
54 Args: inconvertibleErrorCode());
55
56 return std::unique_ptr<TargetMachine>(TM);
57}
58
59Expected<DataLayout>
60JITTargetMachineBuilder::getDefaultDataLayoutForTarget() const {
61 return DataLayout::parse(
62 LayoutString: TT.computeDataLayout(ABIName: Options.MCOptions.getABIName()));
63}
64
65JITTargetMachineBuilder &JITTargetMachineBuilder::addFeatures(
66 const std::vector<std::string> &FeatureVec) {
67 for (const auto &F : FeatureVec)
68 Features.AddFeature(String: F);
69 return *this;
70}
71
72#ifndef NDEBUG
73void 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 CodeGenOptLevel::None:
133 OS << "None";
134 break;
135 case CodeGenOptLevel::Less:
136 OS << "Less";
137 break;
138 case CodeGenOptLevel::Default:
139 OS << "Default";
140 break;
141 case CodeGenOptLevel::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