LLVM 19.0.0git
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.
32 for (auto &Feature : FeatureMap)
33 TMBuilder.getFeatures().AddFeature(Feature.first(), Feature.second);
34
35 TMBuilder.setCPU(std::string(llvm::sys::getHostCPUName()));
36
37 return TMBuilder;
38}
39
42
43 std::string ErrMsg;
44 auto *TheTarget = TargetRegistry::lookupTarget(TT.getTriple(), ErrMsg);
45 if (!TheTarget)
46 return make_error<StringError>(std::move(ErrMsg), inconvertibleErrorCode());
47
48 if (!TheTarget->hasJIT())
49 return make_error<StringError>("Target has no JIT support",
51
52 auto *TM =
53 TheTarget->createTargetMachine(TT.getTriple(), CPU, Features.getString(),
54 Options, RM, CM, OptLevel, /*JIT*/ true);
55 if (!TM)
56 return make_error<StringError>("Could not allocate target machine",
58
59 return std::unique_ptr<TargetMachine>(TM);
60}
61
63 const std::vector<std::string> &FeatureVec) {
64 for (const auto &F : FeatureVec)
65 Features.AddFeature(F);
66 return *this;
67}
68
69#ifndef NDEBUG
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;
87 OS << "DynamicNoPIC";
88 break;
89 case Reloc::ROPI:
90 OS << "ROPI";
91 break;
92 case Reloc::RWPI:
93 OS << "RWPI";
94 break;
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;
114 OS << "Kernel";
115 break;
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) {
130 OS << "None";
131 break;
133 OS << "Less";
134 break;
136 OS << "Default";
137 break;
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.
#define F(x, y, z)
Definition: MD5.cpp:55
const char LLVMTargetMachineRef TM
raw_pwrite_stream & OS
Tagged union holding either a T or a Error.
Definition: Error.h:474
StringMap - This is an unconventional map that is specialized for handling keys that are "strings",...
Definition: StringMap.h:127
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:424
const std::string & getTriple() const
Definition: Triple.h:426
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
StringRef getHostCPUName()
getHostCPUName - Get the LLVM name for the host CPU.
Definition: Host.cpp:1691
bool getHostCPUFeatures(StringMap< bool, MallocAllocator > &Features)
getHostCPUFeatures - Get the LLVM names for the host CPU features.
std::string getProcessTriple()
getProcessTriple() - Return an appropriate target triple for generating code to be loaded into the cu...
Definition: Host.cpp:2037
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:90
const std::vector< TensorSpec > FeatureMap
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:1849
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.