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