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
11#include "llvm/ADT/StringMap.h"
15
16namespace llvm {
17namespace orc {
18
20 : TT(std::move(TT)) {
21 Options.EmulatedTLS = true;
22 Options.UseInitArray = true;
23}
24
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(Feature.first(), Feature.second);
33
34 TMBuilder.setCPU(std::string(llvm::sys::getHostCPUName()));
35
36 return TMBuilder;
37}
38
41
42 std::string ErrMsg;
43 auto *TheTarget = TargetRegistry::lookupTarget(TT.getTriple(), ErrMsg);
44 if (!TheTarget)
45 return make_error<StringError>(std::move(ErrMsg), inconvertibleErrorCode());
46
47 if (!TheTarget->hasJIT())
48 return make_error<StringError>("Target has no JIT support",
50
51 auto *TM =
52 TheTarget->createTargetMachine(TT.getTriple(), CPU, Features.getString(),
53 Options, RM, CM, OptLevel, /*JIT*/ true);
54 if (!TM)
55 return make_error<StringError>("Could not allocate target machine",
57
58 return std::unique_ptr<TargetMachine>(TM);
59}
60
62 const std::vector<std::string> &FeatureVec) {
63 for (const auto &F : FeatureVec)
64 Features.AddFeature(F);
65 return *this;
66}
67
68#ifndef NDEBUG
70 OS << Indent << "{\n"
71 << Indent << " Triple = \"" << JTMB.TT.str() << "\"\n"
72 << Indent << " CPU = \"" << JTMB.CPU << "\"\n"
73 << Indent << " Features = \"" << JTMB.Features.getString() << "\"\n"
74 << Indent << " Options = <not-printable>\n"
75 << Indent << " Relocation Model = ";
76
77 if (JTMB.RM) {
78 switch (*JTMB.RM) {
79 case Reloc::Static:
80 OS << "Static";
81 break;
82 case Reloc::PIC_:
83 OS << "PIC_";
84 break;
86 OS << "DynamicNoPIC";
87 break;
88 case Reloc::ROPI:
89 OS << "ROPI";
90 break;
91 case Reloc::RWPI:
92 OS << "RWPI";
93 break;
95 OS << "ROPI_RWPI";
96 break;
97 }
98 } else
99 OS << "unspecified (will use target default)";
100
101 OS << "\n"
102 << Indent << " Code Model = ";
103
104 if (JTMB.CM) {
105 switch (*JTMB.CM) {
106 case CodeModel::Tiny:
107 OS << "Tiny";
108 break;
109 case CodeModel::Small:
110 OS << "Small";
111 break;
113 OS << "Kernel";
114 break;
116 OS << "Medium";
117 break;
118 case CodeModel::Large:
119 OS << "Large";
120 break;
121 }
122 } else
123 OS << "unspecified (will use target default)";
124
125 OS << "\n"
126 << Indent << " Optimization Level = ";
127 switch (JTMB.OptLevel) {
129 OS << "None";
130 break;
132 OS << "Less";
133 break;
135 OS << "Default";
136 break;
138 OS << "Aggressive";
139 break;
140 }
141
142 OS << "\n" << Indent << "}\n";
143}
144#endif // NDEBUG
145
146} // End namespace orc.
147} // End namespace llvm.
This file defines the StringMap class.
#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: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:440
const std::string & getTriple() const
Definition: Triple.h:442
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:2036
StringRef getHostCPUName()
getHostCPUName - Get the LLVM name for the host CPU.
Definition: Host.cpp:1641
std::string getProcessTriple()
getProcessTriple() - Return an appropriate target triple for generating code to be loaded into the cu...
Definition: Host.cpp:2070
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: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.