LLVM 20.0.0git
JITTargetMachineBuilder.cpp
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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
10
14
15namespace llvm {
16namespace orc {
17
19 : TT(std::move(TT)) {
20 Options.EmulatedTLS = true;
21 Options.UseInitArray = true;
22}
23
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(Feature.first(), Feature.second);
32
33 TMBuilder.setCPU(std::string(llvm::sys::getHostCPUName()));
34
35 return TMBuilder;
36}
37
40
41 std::string ErrMsg;
42 auto *TheTarget = TargetRegistry::lookupTarget(TT.getTriple(), ErrMsg);
43 if (!TheTarget)
44 return make_error<StringError>(std::move(ErrMsg), inconvertibleErrorCode());
45
46 if (!TheTarget->hasJIT())
47 return make_error<StringError>("Target has no JIT support",
49
50 auto *TM =
51 TheTarget->createTargetMachine(TT.getTriple(), CPU, Features.getString(),
52 Options, RM, CM, OptLevel, /*JIT*/ true);
53 if (!TM)
54 return make_error<StringError>("Could not allocate target machine",
56
57 return std::unique_ptr<TargetMachine>(TM);
58}
59
61 const std::vector<std::string> &FeatureVec) {
62 for (const auto &F : FeatureVec)
63 Features.AddFeature(F);
64 return *this;
65}
66
67#ifndef NDEBUG
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;
85 OS << "DynamicNoPIC";
86 break;
87 case Reloc::ROPI:
88 OS << "ROPI";
89 break;
90 case Reloc::RWPI:
91 OS << "RWPI";
92 break;
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;
112 OS << "Kernel";
113 break;
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) {
128 OS << "None";
129 break;
131 OS << "Less";
132 break;
134 OS << "Default";
135 break;
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.
#define F(x, y, z)
Definition: MD5.cpp:55
raw_pwrite_stream & OS
Tagged union holding either a T or a Error.
Definition: Error.h:481
std::string getString() const
Returns features as a string.
void AddFeature(StringRef String, bool Enable=true)
Adds Features.
unsigned UseInitArray
UseInitArray - Use .init_array instead of .ctors for static constructors.
unsigned EmulatedTLS
EmulatedTLS - This flag enables emulated TLS model, using emutls function in the runtime library.
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:44
const std::string & str() const
Definition: Triple.h:450
const std::string & getTriple() const
Definition: Triple.h:452
A utility class for building TargetMachines for JITs.
JITTargetMachineBuilder & addFeatures(const std::vector< std::string > &FeatureVec)
Add subtarget features.
SubtargetFeatures & getFeatures()
Access subtarget features.
static Expected< JITTargetMachineBuilder > detectHost()
Create a JITTargetMachineBuilder for the host system.
JITTargetMachineBuilder(Triple TT)
Create a JITTargetMachineBuilder based on the given triple.
Expected< std::unique_ptr< TargetMachine > > createTargetMachine()
Create a TargetMachine.
JITTargetMachineBuilder & setCPU(std::string CPU)
Set the CPU string.
This class implements an extremely fast bulk output stream that can only output to a stream.
Definition: raw_ostream.h:52
@ DynamicNoPIC
Definition: CodeGen.h:25
@ ROPI_RWPI
Definition: CodeGen.h:25
const StringMap< bool, MallocAllocator > getHostCPUFeatures()
getHostCPUFeatures - Get the LLVM names for the host CPU features.
Definition: Host.cpp:2177
StringRef getHostCPUName()
getHostCPUName - Get the LLVM name for the host CPU.
Definition: Host.cpp:1735
std::string getProcessTriple()
getProcessTriple() - Return an appropriate target triple for generating code to be loaded into the cu...
Definition: Host.cpp:2211
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
std::error_code inconvertibleErrorCode()
The value returned by this function can be returned from convertToErrorCode for Error values where no...
Definition: Error.cpp:98
OutputIt move(R &&Range, OutputIt Out)
Provide wrappers to std::move which take ranges instead of having to pass begin/end explicitly.
Definition: STLExtras.h:1873
Implement std::hash so that hash_code can be used in STL containers.
Definition: BitVector.h:858
static const Target * lookupTarget(StringRef Triple, std::string &Error)
lookupTarget - Lookup a target based on a target triple.