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