LLVM  16.0.0git
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/MC/TargetRegistry.h"
12 #include "llvm/Support/Host.h"
14 
15 namespace llvm {
16 namespace orc {
17 
19  : TT(std::move(TT)) {
20  Options.EmulatedTLS = true;
21  Options.ExplicitEmulatedTLS = true;
22  Options.UseInitArray = true;
23 }
24 
26  // FIXME: getProcessTriple is bogus. It returns the host LLVM was compiled on,
27  // rather than a valid triple for the current process.
29 
30  // Retrieve host CPU name and sub-target features and add them to builder.
31  // Relocation model, code model and codegen opt level are kept to default
32  // values.
35  for (auto &Feature : FeatureMap)
36  TMBuilder.getFeatures().AddFeature(Feature.first(), Feature.second);
37 
38  TMBuilder.setCPU(std::string(llvm::sys::getHostCPUName()));
39 
40  return TMBuilder;
41 }
42 
45 
46  std::string ErrMsg;
47  auto *TheTarget = TargetRegistry::lookupTarget(TT.getTriple(), ErrMsg);
48  if (!TheTarget)
49  return make_error<StringError>(std::move(ErrMsg), inconvertibleErrorCode());
50 
51  if (!TheTarget->hasJIT())
52  return make_error<StringError>("Target has no JIT support",
54 
55  auto *TM =
56  TheTarget->createTargetMachine(TT.getTriple(), CPU, Features.getString(),
57  Options, RM, CM, OptLevel, /*JIT*/ true);
58  if (!TM)
59  return make_error<StringError>("Could not allocate target machine",
61 
62  return std::unique_ptr<TargetMachine>(TM);
63 }
64 
66  const std::vector<std::string> &FeatureVec) {
67  for (const auto &F : FeatureVec)
68  Features.AddFeature(F);
69  return *this;
70 }
71 
72 #ifndef NDEBUG
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;
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 CodeGenOpt::None:
133  OS << "None";
134  break;
135  case CodeGenOpt::Less:
136  OS << "Less";
137  break;
138  case CodeGenOpt::Default:
139  OS << "Default";
140  break;
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.
llvm::orc::JITTargetMachineBuilder
A utility class for building TargetMachines for JITs.
Definition: JITTargetMachineBuilder.h:34
llvm
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
llvm::orc::JITTargetMachineBuilder::createTargetMachine
Expected< std::unique_ptr< TargetMachine > > createTargetMachine()
Create a TargetMachine.
Definition: JITTargetMachineBuilder.cpp:44
llvm::FeatureMap
const std::array< TensorSpec, NumberOfFeatures > FeatureMap
Definition: MLInlineAdvisor.cpp:62
llvm::SubtargetFeatures::AddFeature
void AddFeature(StringRef String, bool Enable=true)
Adds Features.
Definition: SubtargetFeature.cpp:37
llvm::CodeModel::Medium
@ Medium
Definition: CodeGen.h:28
Host.h
llvm::Triple
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:44
llvm::sys::getHostCPUFeatures
bool getHostCPUFeatures(StringMap< bool, MallocAllocator > &Features)
getHostCPUFeatures - Get the LLVM names for the host CPU features.
llvm::Reloc::ROPI_RWPI
@ ROPI_RWPI
Definition: CodeGen.h:22
llvm::orc::JITTargetMachineBuilder::getFeatures
SubtargetFeatures & getFeatures()
Access subtarget features.
Definition: JITTargetMachineBuilder.h:120
llvm::Expected
Tagged union holding either a T or a Error.
Definition: APFloat.h:41
llvm::CodeModel::Kernel
@ Kernel
Definition: CodeGen.h:28
llvm::TargetRegistry::lookupTarget
static const Target * lookupTarget(const std::string &Triple, std::string &Error)
lookupTarget - Lookup a target based on a target triple.
Definition: TargetRegistry.cpp:62
F
#define F(x, y, z)
Definition: MD5.cpp:55
llvm::Triple::str
const std::string & str() const
Definition: Triple.h:413
llvm::TargetOptions::UseInitArray
unsigned UseInitArray
UseInitArray - Use .init_array instead of .ctors for static constructors.
Definition: TargetOptions.h:248
llvm::CodeModel::Small
@ Small
Definition: CodeGen.h:28
llvm::raw_ostream
This class implements an extremely fast bulk output stream that can only output to a stream.
Definition: raw_ostream.h:53
llvm::TargetOptions::EmulatedTLS
unsigned EmulatedTLS
EmulatedTLS - This flag enables emulated TLS model, using emutls function in the runtime library.
Definition: TargetOptions.h:291
llvm::orc::JITTargetMachineBuilder::detectHost
static Expected< JITTargetMachineBuilder > detectHost()
Create a JITTargetMachineBuilder for the host system.
Definition: JITTargetMachineBuilder.cpp:25
llvm::Triple::getTriple
const std::string & getTriple() const
Definition: Triple.h:415
llvm::StringMap< bool >
llvm::orc::JITTargetMachineBuilder::setCPU
JITTargetMachineBuilder & setCPU(std::string CPU)
Set the CPU string.
Definition: JITTargetMachineBuilder.h:77
llvm::SubtargetFeatures::getString
std::string getString() const
Returns features as a string.
Definition: SubtargetFeature.cpp:50
llvm::CodeGenOpt::Default
@ Default
Definition: CodeGen.h:55
move
compiles ldr LCPI1_0 ldr ldr mov lsr tst moveq r1 ldr LCPI1_1 and r0 bx lr It would be better to do something like to fold the shift into the conditional move
Definition: README.txt:546
llvm::orc::JITTargetMachineBuilder::JITTargetMachineBuilder
JITTargetMachineBuilder(Triple TT)
Create a JITTargetMachineBuilder based on the given triple.
Definition: JITTargetMachineBuilder.cpp:18
llvm::move
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:1861
llvm::Reloc::ROPI
@ ROPI
Definition: CodeGen.h:22
llvm::CodeGenOpt::Aggressive
@ Aggressive
Definition: CodeGen.h:56
llvm::Reloc::DynamicNoPIC
@ DynamicNoPIC
Definition: CodeGen.h:22
llvm::CodeGenOpt::None
@ None
Definition: CodeGen.h:53
llvm::Reloc::RWPI
@ RWPI
Definition: CodeGen.h:22
llvm::Reloc::PIC_
@ PIC_
Definition: CodeGen.h:22
llvm::Reloc::Static
@ Static
Definition: CodeGen.h:22
llvm::CodeModel::Tiny
@ Tiny
Definition: CodeGen.h:28
std
Definition: BitVector.h:851
llvm::inconvertibleErrorCode
std::error_code inconvertibleErrorCode()
The value returned by this function can be returned from convertToErrorCode for Error values where no...
Definition: Error.cpp:79
llvm::sys::getProcessTriple
std::string getProcessTriple()
getProcessTriple() - Return an appropriate target triple for generating code to be loaded into the cu...
Definition: Host.cpp:1839
llvm::CodeModel::Large
@ Large
Definition: CodeGen.h:28
llvm::orc::JITTargetMachineBuilder::addFeatures
JITTargetMachineBuilder & addFeatures(const std::vector< std::string > &FeatureVec)
Add subtarget features.
Definition: JITTargetMachineBuilder.cpp:65
llvm::sys::getHostCPUName
StringRef getHostCPUName()
getHostCPUName - Get the LLVM name for the host CPU.
Definition: Host.cpp:1563
TM
const char LLVMTargetMachineRef TM
Definition: PassBuilderBindings.cpp:47
raw_ostream.h
llvm::CodeGenOpt::Less
@ Less
Definition: CodeGen.h:54
TargetRegistry.h
llvm::TargetOptions::ExplicitEmulatedTLS
unsigned ExplicitEmulatedTLS
Whether -emulated-tls or -no-emulated-tls is set.
Definition: TargetOptions.h:294
JITTargetMachineBuilder.h
llvm::orc::JITTargetMachineBuilderPrinter::print
void print(raw_ostream &OS) const
Definition: JITTargetMachineBuilder.cpp:73