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//===----- JITTargetMachineBuilder.cpp - Build TargetMachines for JIT -----===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/ExecutionEngine/Orc/JITTargetMachineBuilder.h"
#include "llvm/MC/TargetRegistry.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/raw_ostream.h"
namespace llvm {
namespace orc {
JITTargetMachineBuilder::JITTargetMachineBuilder(Triple TT)
: TT(std::move(TT)) {
Options.EmulatedTLS = true;
Options.ExplicitEmulatedTLS = true;
}
Expected<JITTargetMachineBuilder> JITTargetMachineBuilder::detectHost() {
// FIXME: getProcessTriple is bogus. It returns the host LLVM was compiled on,
// rather than a valid triple for the current process.
JITTargetMachineBuilder TMBuilder((Triple(sys::getProcessTriple())));
// Retrieve host CPU name and sub-target features and add them to builder.
// Relocation model, code model and codegen opt level are kept to default
// values.
llvm::StringMap<bool> FeatureMap;
llvm::sys::getHostCPUFeatures(FeatureMap);
for (auto &Feature : FeatureMap)
TMBuilder.getFeatures().AddFeature(Feature.first(), Feature.second);
TMBuilder.setCPU(std::string(llvm::sys::getHostCPUName()));
return TMBuilder;
}
Expected<std::unique_ptr<TargetMachine>>
JITTargetMachineBuilder::createTargetMachine() {
std::string ErrMsg;
auto *TheTarget = TargetRegistry::lookupTarget(TT.getTriple(), ErrMsg);
if (!TheTarget)
return make_error<StringError>(std::move(ErrMsg), inconvertibleErrorCode());
auto *TM =
TheTarget->createTargetMachine(TT.getTriple(), CPU, Features.getString(),
Options, RM, CM, OptLevel, /*JIT*/ true);
if (!TM)
return make_error<StringError>("Could not allocate target machine",
inconvertibleErrorCode());
return std::unique_ptr<TargetMachine>(TM);
}
JITTargetMachineBuilder &JITTargetMachineBuilder::addFeatures(
const std::vector<std::string> &FeatureVec) {
for (const auto &F : FeatureVec)
Features.AddFeature(F);
return *this;
}
#ifndef NDEBUG
void JITTargetMachineBuilderPrinter::print(raw_ostream &OS) const {
OS << Indent << "{\n"
<< Indent << " Triple = \"" << JTMB.TT.str() << "\"\n"
<< Indent << " CPU = \"" << JTMB.CPU << "\"\n"
<< Indent << " Features = \"" << JTMB.Features.getString() << "\"\n"
<< Indent << " Options = <not-printable>\n"
<< Indent << " Relocation Model = ";
if (JTMB.RM) {
switch (*JTMB.RM) {
case Reloc::Static:
OS << "Static";
break;
case Reloc::PIC_:
OS << "PIC_";
break;
case Reloc::DynamicNoPIC:
OS << "DynamicNoPIC";
break;
case Reloc::ROPI:
OS << "ROPI";
break;
case Reloc::RWPI:
OS << "RWPI";
break;
case Reloc::ROPI_RWPI:
OS << "ROPI_RWPI";
break;
}
} else
OS << "unspecified (will use target default)";
OS << "\n"
<< Indent << " Code Model = ";
if (JTMB.CM) {
switch (*JTMB.CM) {
case CodeModel::Tiny:
OS << "Tiny";
break;
case CodeModel::Small:
OS << "Small";
break;
case CodeModel::Kernel:
OS << "Kernel";
break;
case CodeModel::Medium:
OS << "Medium";
break;
case CodeModel::Large:
OS << "Large";
break;
}
} else
OS << "unspecified (will use target default)";
OS << "\n"
<< Indent << " Optimization Level = ";
switch (JTMB.OptLevel) {
case CodeGenOpt::None:
OS << "None";
break;
case CodeGenOpt::Less:
OS << "Less";
break;
case CodeGenOpt::Default:
OS << "Default";
break;
case CodeGenOpt::Aggressive:
OS << "Aggressive";
break;
}
OS << "\n" << Indent << "}\n";
}
#endif // NDEBUG
} // End namespace orc.
} // End namespace llvm.
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