| //===--- AMDGPU.cpp - AMDGPU ToolChain Implementations ----------*- C++ -*-===// |
| // |
| // 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 "AMDGPU.h" |
| #include "CommonArgs.h" |
| #include "InputInfo.h" |
| #include "clang/Basic/TargetID.h" |
| #include "clang/Driver/Compilation.h" |
| #include "clang/Driver/DriverDiagnostic.h" |
| #include "llvm/Option/ArgList.h" |
| #include "llvm/Support/Path.h" |
| #include "llvm/Support/VirtualFileSystem.h" |
| |
| using namespace clang::driver; |
| using namespace clang::driver::tools; |
| using namespace clang::driver::toolchains; |
| using namespace clang; |
| using namespace llvm::opt; |
| |
| // Look for sub-directory starts with PackageName under ROCm candidate path. |
| // If there is one and only one matching sub-directory found, append the |
| // sub-directory to Path. If there is no matching sub-directory or there are |
| // more than one matching sub-directories, diagnose them. Returns the full |
| // path of the package if there is only one matching sub-directory, otherwise |
| // returns an empty string. |
| llvm::SmallString<0> |
| RocmInstallationDetector::findSPACKPackage(const Candidate &Cand, |
| StringRef PackageName) { |
| if (!Cand.isSPACK()) |
| return {}; |
| std::error_code EC; |
| std::string Prefix = Twine(PackageName + "-" + Cand.SPACKReleaseStr).str(); |
| llvm::SmallVector<llvm::SmallString<0>> SubDirs; |
| for (llvm::vfs::directory_iterator File = D.getVFS().dir_begin(Cand.Path, EC), |
| FileEnd; |
| File != FileEnd && !EC; File.increment(EC)) { |
| llvm::StringRef FileName = llvm::sys::path::filename(File->path()); |
| if (FileName.startswith(Prefix)) { |
| SubDirs.push_back(FileName); |
| if (SubDirs.size() > 1) |
| break; |
| } |
| } |
| if (SubDirs.size() == 1) { |
| auto PackagePath = Cand.Path; |
| llvm::sys::path::append(PackagePath, SubDirs[0]); |
| return PackagePath; |
| } |
| if (SubDirs.size() == 0) { |
| unsigned DiagID = D.getDiags().getCustomDiagID( |
| DiagnosticsEngine::Error, |
| "Expecting SPACK package %0 at %1 but not found"); |
| D.Diag(DiagID) << Prefix << Cand.Path; |
| return {}; |
| } |
| |
| assert(SubDirs.size() > 1); |
| unsigned DiagID = D.getDiags().getCustomDiagID( |
| DiagnosticsEngine::Error, |
| "Expecting one SPACK package %0 at %1 but found more"); |
| D.Diag(DiagID) << Prefix << Cand.Path; |
| return {}; |
| } |
| |
| void RocmInstallationDetector::scanLibDevicePath(llvm::StringRef Path) { |
| assert(!Path.empty()); |
| |
| const StringRef Suffix(".bc"); |
| const StringRef Suffix2(".amdgcn.bc"); |
| |
| std::error_code EC; |
| for (llvm::vfs::directory_iterator LI = D.getVFS().dir_begin(Path, EC), LE; |
| !EC && LI != LE; LI = LI.increment(EC)) { |
| StringRef FilePath = LI->path(); |
| StringRef FileName = llvm::sys::path::filename(FilePath); |
| if (!FileName.endswith(Suffix)) |
| continue; |
| |
| StringRef BaseName; |
| if (FileName.endswith(Suffix2)) |
| BaseName = FileName.drop_back(Suffix2.size()); |
| else if (FileName.endswith(Suffix)) |
| BaseName = FileName.drop_back(Suffix.size()); |
| |
| if (BaseName == "ocml") { |
| OCML = FilePath; |
| } else if (BaseName == "ockl") { |
| OCKL = FilePath; |
| } else if (BaseName == "opencl") { |
| OpenCL = FilePath; |
| } else if (BaseName == "hip") { |
| HIP = FilePath; |
| } else if (BaseName == "asanrtl") { |
| AsanRTL = FilePath; |
| } else if (BaseName == "oclc_finite_only_off") { |
| FiniteOnly.Off = FilePath; |
| } else if (BaseName == "oclc_finite_only_on") { |
| FiniteOnly.On = FilePath; |
| } else if (BaseName == "oclc_daz_opt_on") { |
| DenormalsAreZero.On = FilePath; |
| } else if (BaseName == "oclc_daz_opt_off") { |
| DenormalsAreZero.Off = FilePath; |
| } else if (BaseName == "oclc_correctly_rounded_sqrt_on") { |
| CorrectlyRoundedSqrt.On = FilePath; |
| } else if (BaseName == "oclc_correctly_rounded_sqrt_off") { |
| CorrectlyRoundedSqrt.Off = FilePath; |
| } else if (BaseName == "oclc_unsafe_math_on") { |
| UnsafeMath.On = FilePath; |
| } else if (BaseName == "oclc_unsafe_math_off") { |
| UnsafeMath.Off = FilePath; |
| } else if (BaseName == "oclc_wavefrontsize64_on") { |
| WavefrontSize64.On = FilePath; |
| } else if (BaseName == "oclc_wavefrontsize64_off") { |
| WavefrontSize64.Off = FilePath; |
| } else { |
| // Process all bitcode filenames that look like |
| // ocl_isa_version_XXX.amdgcn.bc |
| const StringRef DeviceLibPrefix = "oclc_isa_version_"; |
| if (!BaseName.startswith(DeviceLibPrefix)) |
| continue; |
| |
| StringRef IsaVersionNumber = |
| BaseName.drop_front(DeviceLibPrefix.size()); |
| |
| llvm::Twine GfxName = Twine("gfx") + IsaVersionNumber; |
| SmallString<8> Tmp; |
| LibDeviceMap.insert( |
| std::make_pair(GfxName.toStringRef(Tmp), FilePath.str())); |
| } |
| } |
| } |
| |
| // Parse and extract version numbers from `.hipVersion`. Return `true` if |
| // the parsing fails. |
| bool RocmInstallationDetector::parseHIPVersionFile(llvm::StringRef V) { |
| SmallVector<StringRef, 4> VersionParts; |
| V.split(VersionParts, '\n'); |
| unsigned Major = ~0U; |
| unsigned Minor = ~0U; |
| for (auto Part : VersionParts) { |
| auto Splits = Part.rtrim().split('='); |
| if (Splits.first == "HIP_VERSION_MAJOR") { |
| if (Splits.second.getAsInteger(0, Major)) |
| return true; |
| } else if (Splits.first == "HIP_VERSION_MINOR") { |
| if (Splits.second.getAsInteger(0, Minor)) |
| return true; |
| } else if (Splits.first == "HIP_VERSION_PATCH") |
| VersionPatch = Splits.second.str(); |
| } |
| if (Major == ~0U || Minor == ~0U) |
| return true; |
| VersionMajorMinor = llvm::VersionTuple(Major, Minor); |
| DetectedVersion = |
| (Twine(Major) + "." + Twine(Minor) + "." + VersionPatch).str(); |
| return false; |
| } |
| |
| /// \returns a list of candidate directories for ROCm installation, which is |
| /// cached and populated only once. |
| const SmallVectorImpl<RocmInstallationDetector::Candidate> & |
| RocmInstallationDetector::getInstallationPathCandidates() { |
| |
| // Return the cached candidate list if it has already been populated. |
| if (!ROCmSearchDirs.empty()) |
| return ROCmSearchDirs; |
| |
| auto DoPrintROCmSearchDirs = [&]() { |
| if (PrintROCmSearchDirs) |
| for (auto Cand : ROCmSearchDirs) { |
| llvm::errs() << "ROCm installation search path"; |
| if (Cand.isSPACK()) |
| llvm::errs() << " (Spack " << Cand.SPACKReleaseStr << ")"; |
| llvm::errs() << ": " << Cand.Path << '\n'; |
| } |
| }; |
| |
| // For candidate specified by --rocm-path we do not do strict check, i.e., |
| // checking existence of HIP version file and device library files. |
| if (!RocmPathArg.empty()) { |
| ROCmSearchDirs.emplace_back(RocmPathArg.str()); |
| DoPrintROCmSearchDirs(); |
| return ROCmSearchDirs; |
| } else if (const char *RocmPathEnv = ::getenv("ROCM_PATH")) { |
| if (!StringRef(RocmPathEnv).empty()) { |
| ROCmSearchDirs.emplace_back(RocmPathEnv); |
| DoPrintROCmSearchDirs(); |
| return ROCmSearchDirs; |
| } |
| } |
| |
| // Try to find relative to the compiler binary. |
| const char *InstallDir = D.getInstalledDir(); |
| |
| // Check both a normal Unix prefix position of the clang binary, as well as |
| // the Windows-esque layout the ROCm packages use with the host architecture |
| // subdirectory of bin. |
| auto DeduceROCmPath = [](StringRef ClangPath) { |
| // Strip off directory (usually bin) |
| StringRef ParentDir = llvm::sys::path::parent_path(ClangPath); |
| StringRef ParentName = llvm::sys::path::filename(ParentDir); |
| |
| // Some builds use bin/{host arch}, so go up again. |
| if (ParentName == "bin") { |
| ParentDir = llvm::sys::path::parent_path(ParentDir); |
| ParentName = llvm::sys::path::filename(ParentDir); |
| } |
| |
| // Detect ROCm packages built with SPACK. |
| // clang is installed at |
| // <rocm_root>/llvm-amdgpu-<rocm_release_string>-<hash>/bin directory. |
| // We only consider the parent directory of llvm-amdgpu package as ROCm |
| // installation candidate for SPACK. |
| if (ParentName.startswith("llvm-amdgpu-")) { |
| auto SPACKPostfix = |
| ParentName.drop_front(strlen("llvm-amdgpu-")).split('-'); |
| auto SPACKReleaseStr = SPACKPostfix.first; |
| if (!SPACKReleaseStr.empty()) { |
| ParentDir = llvm::sys::path::parent_path(ParentDir); |
| return Candidate(ParentDir.str(), /*StrictChecking=*/true, |
| SPACKReleaseStr); |
| } |
| } |
| |
| // Some versions of the rocm llvm package install to /opt/rocm/llvm/bin |
| // Some versions of the aomp package install to /opt/rocm/aomp/bin |
| if (ParentName == "llvm" || ParentName.startswith("aomp")) |
| ParentDir = llvm::sys::path::parent_path(ParentDir); |
| |
| return Candidate(ParentDir.str(), /*StrictChecking=*/true); |
| }; |
| |
| // Deduce ROCm path by the path used to invoke clang. Do not resolve symbolic |
| // link of clang itself. |
| ROCmSearchDirs.emplace_back(DeduceROCmPath(InstallDir)); |
| |
| // Deduce ROCm path by the real path of the invoked clang, resolving symbolic |
| // link of clang itself. |
| llvm::SmallString<256> RealClangPath; |
| llvm::sys::fs::real_path(D.getClangProgramPath(), RealClangPath); |
| auto ParentPath = llvm::sys::path::parent_path(RealClangPath); |
| if (ParentPath != InstallDir) |
| ROCmSearchDirs.emplace_back(DeduceROCmPath(ParentPath)); |
| |
| // Device library may be installed in clang resource directory. |
| ROCmSearchDirs.emplace_back(D.ResourceDir, |
| /*StrictChecking=*/true); |
| |
| ROCmSearchDirs.emplace_back(D.SysRoot + "/opt/rocm", |
| /*StrictChecking=*/true); |
| |
| // Find the latest /opt/rocm-{release} directory. |
| std::error_code EC; |
| std::string LatestROCm; |
| llvm::VersionTuple LatestVer; |
| // Get ROCm version from ROCm directory name. |
| auto GetROCmVersion = [](StringRef DirName) { |
| llvm::VersionTuple V; |
| std::string VerStr = DirName.drop_front(strlen("rocm-")).str(); |
| // The ROCm directory name follows the format of |
| // rocm-{major}.{minor}.{subMinor}[-{build}] |
| std::replace(VerStr.begin(), VerStr.end(), '-', '.'); |
| V.tryParse(VerStr); |
| return V; |
| }; |
| for (llvm::vfs::directory_iterator |
| File = D.getVFS().dir_begin(D.SysRoot + "/opt", EC), |
| FileEnd; |
| File != FileEnd && !EC; File.increment(EC)) { |
| llvm::StringRef FileName = llvm::sys::path::filename(File->path()); |
| if (!FileName.startswith("rocm-")) |
| continue; |
| if (LatestROCm.empty()) { |
| LatestROCm = FileName.str(); |
| LatestVer = GetROCmVersion(LatestROCm); |
| continue; |
| } |
| auto Ver = GetROCmVersion(FileName); |
| if (LatestVer < Ver) { |
| LatestROCm = FileName.str(); |
| LatestVer = Ver; |
| } |
| } |
| if (!LatestROCm.empty()) |
| ROCmSearchDirs.emplace_back(D.SysRoot + "/opt/" + LatestROCm, |
| /*StrictChecking=*/true); |
| |
| DoPrintROCmSearchDirs(); |
| return ROCmSearchDirs; |
| } |
| |
| RocmInstallationDetector::RocmInstallationDetector( |
| const Driver &D, const llvm::Triple &HostTriple, |
| const llvm::opt::ArgList &Args, bool DetectHIPRuntime, bool DetectDeviceLib) |
| : D(D) { |
| RocmPathArg = Args.getLastArgValue(clang::driver::options::OPT_rocm_path_EQ); |
| PrintROCmSearchDirs = |
| Args.hasArg(clang::driver::options::OPT_print_rocm_search_dirs); |
| RocmDeviceLibPathArg = |
| Args.getAllArgValues(clang::driver::options::OPT_rocm_device_lib_path_EQ); |
| HIPPathArg = Args.getLastArgValue(clang::driver::options::OPT_hip_path_EQ); |
| if (auto *A = Args.getLastArg(clang::driver::options::OPT_hip_version_EQ)) { |
| HIPVersionArg = A->getValue(); |
| unsigned Major = 0; |
| unsigned Minor = 0; |
| SmallVector<StringRef, 3> Parts; |
| HIPVersionArg.split(Parts, '.'); |
| if (Parts.size()) |
| Parts[0].getAsInteger(0, Major); |
| if (Parts.size() > 1) |
| Parts[1].getAsInteger(0, Minor); |
| if (Parts.size() > 2) |
| VersionPatch = Parts[2].str(); |
| if (VersionPatch.empty()) |
| VersionPatch = "0"; |
| if (Major == 0 || Minor == 0) |
| D.Diag(diag::err_drv_invalid_value) |
| << A->getAsString(Args) << HIPVersionArg; |
| |
| VersionMajorMinor = llvm::VersionTuple(Major, Minor); |
| DetectedVersion = |
| (Twine(Major) + "." + Twine(Minor) + "." + VersionPatch).str(); |
| } else { |
| VersionPatch = DefaultVersionPatch; |
| VersionMajorMinor = |
| llvm::VersionTuple(DefaultVersionMajor, DefaultVersionMinor); |
| DetectedVersion = (Twine(DefaultVersionMajor) + "." + |
| Twine(DefaultVersionMinor) + "." + VersionPatch) |
| .str(); |
| } |
| |
| if (DetectHIPRuntime) |
| detectHIPRuntime(); |
| if (DetectDeviceLib) |
| detectDeviceLibrary(); |
| } |
| |
| void RocmInstallationDetector::detectDeviceLibrary() { |
| assert(LibDevicePath.empty()); |
| |
| if (!RocmDeviceLibPathArg.empty()) |
| LibDevicePath = RocmDeviceLibPathArg[RocmDeviceLibPathArg.size() - 1]; |
| else if (const char *LibPathEnv = ::getenv("HIP_DEVICE_LIB_PATH")) |
| LibDevicePath = LibPathEnv; |
| |
| auto &FS = D.getVFS(); |
| if (!LibDevicePath.empty()) { |
| // Maintain compatability with HIP flag/envvar pointing directly at the |
| // bitcode library directory. This points directly at the library path instead |
| // of the rocm root installation. |
| if (!FS.exists(LibDevicePath)) |
| return; |
| |
| scanLibDevicePath(LibDevicePath); |
| HasDeviceLibrary = allGenericLibsValid() && !LibDeviceMap.empty(); |
| return; |
| } |
| |
| // The install path situation in old versions of ROCm is a real mess, and |
| // use a different install layout. Multiple copies of the device libraries |
| // exist for each frontend project, and differ depending on which build |
| // system produced the packages. Standalone OpenCL builds also have a |
| // different directory structure from the ROCm OpenCL package. |
| auto &ROCmDirs = getInstallationPathCandidates(); |
| for (const auto &Candidate : ROCmDirs) { |
| auto CandidatePath = Candidate.Path; |
| |
| // Check device library exists at the given path. |
| auto CheckDeviceLib = [&](StringRef Path) { |
| bool CheckLibDevice = (!NoBuiltinLibs || Candidate.StrictChecking); |
| if (CheckLibDevice && !FS.exists(Path)) |
| return false; |
| |
| scanLibDevicePath(Path); |
| |
| if (!NoBuiltinLibs) { |
| // Check that the required non-target libraries are all available. |
| if (!allGenericLibsValid()) |
| return false; |
| |
| // Check that we have found at least one libdevice that we can link in |
| // if -nobuiltinlib hasn't been specified. |
| if (LibDeviceMap.empty()) |
| return false; |
| } |
| return true; |
| }; |
| |
| // The possible structures are: |
| // - ${ROCM_ROOT}/amdgcn/bitcode/* |
| // - ${ROCM_ROOT}/lib/* |
| // - ${ROCM_ROOT}/lib/bitcode/* |
| // so try to detect these layouts. |
| static constexpr std::array<const char *, 2> SubDirsList[] = { |
| {"amdgcn", "bitcode"}, |
| {"lib", ""}, |
| {"lib", "bitcode"}, |
| }; |
| |
| // Make a path by appending sub-directories to InstallPath. |
| auto MakePath = [&](const llvm::ArrayRef<const char *> &SubDirs) { |
| // Device library built by SPACK is installed to |
| // <rocm_root>/rocm-device-libs-<rocm_release_string>-<hash> directory. |
| auto SPACKPath = findSPACKPackage(Candidate, "rocm-device-libs"); |
| auto Path = SPACKPath.empty() ? CandidatePath : SPACKPath; |
| for (auto SubDir : SubDirs) |
| llvm::sys::path::append(Path, SubDir); |
| return Path; |
| }; |
| |
| for (auto SubDirs : SubDirsList) { |
| LibDevicePath = MakePath(SubDirs); |
| HasDeviceLibrary = CheckDeviceLib(LibDevicePath); |
| if (HasDeviceLibrary) |
| return; |
| } |
| } |
| } |
| |
| void RocmInstallationDetector::detectHIPRuntime() { |
| SmallVector<Candidate, 4> HIPSearchDirs; |
| if (!HIPPathArg.empty()) |
| HIPSearchDirs.emplace_back(HIPPathArg.str(), /*StrictChecking=*/true); |
| else |
| HIPSearchDirs.append(getInstallationPathCandidates()); |
| auto &FS = D.getVFS(); |
| |
| for (const auto &Candidate : HIPSearchDirs) { |
| InstallPath = Candidate.Path; |
| if (InstallPath.empty() || !FS.exists(InstallPath)) |
| continue; |
| // HIP runtime built by SPACK is installed to |
| // <rocm_root>/hip-<rocm_release_string>-<hash> directory. |
| auto SPACKPath = findSPACKPackage(Candidate, "hip"); |
| InstallPath = SPACKPath.empty() ? InstallPath : SPACKPath; |
| |
| BinPath = InstallPath; |
| llvm::sys::path::append(BinPath, "bin"); |
| IncludePath = InstallPath; |
| llvm::sys::path::append(IncludePath, "include"); |
| LibPath = InstallPath; |
| llvm::sys::path::append(LibPath, "lib"); |
| |
| llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> VersionFile = |
| FS.getBufferForFile(BinPath + "/.hipVersion"); |
| if (!VersionFile && Candidate.StrictChecking) |
| continue; |
| |
| if (HIPVersionArg.empty() && VersionFile) |
| if (parseHIPVersionFile((*VersionFile)->getBuffer())) |
| continue; |
| |
| HasHIPRuntime = true; |
| return; |
| } |
| HasHIPRuntime = false; |
| } |
| |
| void RocmInstallationDetector::print(raw_ostream &OS) const { |
| if (hasHIPRuntime()) |
| OS << "Found HIP installation: " << InstallPath << ", version " |
| << DetectedVersion << '\n'; |
| } |
| |
| void RocmInstallationDetector::AddHIPIncludeArgs(const ArgList &DriverArgs, |
| ArgStringList &CC1Args) const { |
| bool UsesRuntimeWrapper = VersionMajorMinor > llvm::VersionTuple(3, 5); |
| |
| if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) { |
| // HIP header includes standard library wrapper headers under clang |
| // cuda_wrappers directory. Since these wrapper headers include_next |
| // standard C++ headers, whereas libc++ headers include_next other clang |
| // headers. The include paths have to follow this order: |
| // - wrapper include path |
| // - standard C++ include path |
| // - other clang include path |
| // Since standard C++ and other clang include paths are added in other |
| // places after this function, here we only need to make sure wrapper |
| // include path is added. |
| // |
| // ROCm 3.5 does not fully support the wrapper headers. Therefore it needs |
| // a workaround. |
| SmallString<128> P(D.ResourceDir); |
| if (UsesRuntimeWrapper) |
| llvm::sys::path::append(P, "include", "cuda_wrappers"); |
| CC1Args.push_back("-internal-isystem"); |
| CC1Args.push_back(DriverArgs.MakeArgString(P)); |
| } |
| |
| if (DriverArgs.hasArg(options::OPT_nogpuinc)) |
| return; |
| |
| if (!hasHIPRuntime()) { |
| D.Diag(diag::err_drv_no_hip_runtime); |
| return; |
| } |
| |
| CC1Args.push_back("-internal-isystem"); |
| CC1Args.push_back(DriverArgs.MakeArgString(getIncludePath())); |
| if (UsesRuntimeWrapper) |
| CC1Args.append({"-include", "__clang_hip_runtime_wrapper.h"}); |
| } |
| |
| void amdgpu::Linker::ConstructJob(Compilation &C, const JobAction &JA, |
| const InputInfo &Output, |
| const InputInfoList &Inputs, |
| const ArgList &Args, |
| const char *LinkingOutput) const { |
| |
| std::string Linker = getToolChain().GetProgramPath(getShortName()); |
| ArgStringList CmdArgs; |
| addLinkerCompressDebugSectionsOption(getToolChain(), Args, CmdArgs); |
| AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs, JA); |
| CmdArgs.push_back("-shared"); |
| CmdArgs.push_back("-o"); |
| CmdArgs.push_back(Output.getFilename()); |
| C.addCommand(std::make_unique<Command>( |
| JA, *this, ResponseFileSupport::AtFileCurCP(), Args.MakeArgString(Linker), |
| CmdArgs, Inputs, Output)); |
| } |
| |
| void amdgpu::getAMDGPUTargetFeatures(const Driver &D, |
| const llvm::Triple &Triple, |
| const llvm::opt::ArgList &Args, |
| std::vector<StringRef> &Features) { |
| // Add target ID features to -target-feature options. No diagnostics should |
| // be emitted here since invalid target ID is diagnosed at other places. |
| StringRef TargetID = Args.getLastArgValue(options::OPT_mcpu_EQ); |
| if (!TargetID.empty()) { |
| llvm::StringMap<bool> FeatureMap; |
| auto OptionalGpuArch = parseTargetID(Triple, TargetID, &FeatureMap); |
| if (OptionalGpuArch) { |
| StringRef GpuArch = OptionalGpuArch.getValue(); |
| // Iterate through all possible target ID features for the given GPU. |
| // If it is mapped to true, add +feature. |
| // If it is mapped to false, add -feature. |
| // If it is not in the map (default), do not add it |
| for (auto &&Feature : getAllPossibleTargetIDFeatures(Triple, GpuArch)) { |
| auto Pos = FeatureMap.find(Feature); |
| if (Pos == FeatureMap.end()) |
| continue; |
| Features.push_back(Args.MakeArgStringRef( |
| (Twine(Pos->second ? "+" : "-") + Feature).str())); |
| } |
| } |
| } |
| |
| if (Args.hasFlag(options::OPT_mwavefrontsize64, |
| options::OPT_mno_wavefrontsize64, false)) |
| Features.push_back("+wavefrontsize64"); |
| |
| handleTargetFeaturesGroup( |
| Args, Features, options::OPT_m_amdgpu_Features_Group); |
| } |
| |
| /// AMDGPU Toolchain |
| AMDGPUToolChain::AMDGPUToolChain(const Driver &D, const llvm::Triple &Triple, |
| const ArgList &Args) |
| : Generic_ELF(D, Triple, Args), |
| OptionsDefault( |
| {{options::OPT_O, "3"}, {options::OPT_cl_std_EQ, "CL1.2"}}) { |
| // Check code object version options. Emit warnings for legacy options |
| // and errors for the last invalid code object version options. |
| // It is done here to avoid repeated warning or error messages for |
| // each tool invocation. |
| (void)getOrCheckAMDGPUCodeObjectVersion(D, Args, /*Diagnose=*/true); |
| } |
| |
| Tool *AMDGPUToolChain::buildLinker() const { |
| return new tools::amdgpu::Linker(*this); |
| } |
| |
| DerivedArgList * |
| AMDGPUToolChain::TranslateArgs(const DerivedArgList &Args, StringRef BoundArch, |
| Action::OffloadKind DeviceOffloadKind) const { |
| |
| DerivedArgList *DAL = |
| Generic_ELF::TranslateArgs(Args, BoundArch, DeviceOffloadKind); |
| |
| const OptTable &Opts = getDriver().getOpts(); |
| |
| if (!DAL) |
| DAL = new DerivedArgList(Args.getBaseArgs()); |
| |
| for (Arg *A : Args) { |
| if (!shouldSkipArgument(A)) |
| DAL->append(A); |
| } |
| |
| checkTargetID(*DAL); |
| |
| if (!Args.getLastArgValue(options::OPT_x).equals("cl")) |
| return DAL; |
| |
| // Phase 1 (.cl -> .bc) |
| if (Args.hasArg(options::OPT_c) && Args.hasArg(options::OPT_emit_llvm)) { |
| DAL->AddFlagArg(nullptr, Opts.getOption(getTriple().isArch64Bit() |
| ? options::OPT_m64 |
| : options::OPT_m32)); |
| |
| // Have to check OPT_O4, OPT_O0 & OPT_Ofast separately |
| // as they defined that way in Options.td |
| if (!Args.hasArg(options::OPT_O, options::OPT_O0, options::OPT_O4, |
| options::OPT_Ofast)) |
| DAL->AddJoinedArg(nullptr, Opts.getOption(options::OPT_O), |
| getOptionDefault(options::OPT_O)); |
| } |
| |
| return DAL; |
| } |
| |
| bool AMDGPUToolChain::getDefaultDenormsAreZeroForTarget( |
| llvm::AMDGPU::GPUKind Kind) { |
| |
| // Assume nothing without a specific target. |
| if (Kind == llvm::AMDGPU::GK_NONE) |
| return false; |
| |
| const unsigned ArchAttr = llvm::AMDGPU::getArchAttrAMDGCN(Kind); |
| |
| // Default to enabling f32 denormals by default on subtargets where fma is |
| // fast with denormals |
| const bool BothDenormAndFMAFast = |
| (ArchAttr & llvm::AMDGPU::FEATURE_FAST_FMA_F32) && |
| (ArchAttr & llvm::AMDGPU::FEATURE_FAST_DENORMAL_F32); |
| return !BothDenormAndFMAFast; |
| } |
| |
| llvm::DenormalMode AMDGPUToolChain::getDefaultDenormalModeForType( |
| const llvm::opt::ArgList &DriverArgs, const JobAction &JA, |
| const llvm::fltSemantics *FPType) const { |
| // Denormals should always be enabled for f16 and f64. |
| if (!FPType || FPType != &llvm::APFloat::IEEEsingle()) |
| return llvm::DenormalMode::getIEEE(); |
| |
| if (JA.getOffloadingDeviceKind() == Action::OFK_HIP || |
| JA.getOffloadingDeviceKind() == Action::OFK_Cuda) { |
| auto Arch = getProcessorFromTargetID(getTriple(), JA.getOffloadingArch()); |
| auto Kind = llvm::AMDGPU::parseArchAMDGCN(Arch); |
| if (FPType && FPType == &llvm::APFloat::IEEEsingle() && |
| DriverArgs.hasFlag(options::OPT_fcuda_flush_denormals_to_zero, |
| options::OPT_fno_cuda_flush_denormals_to_zero, |
| getDefaultDenormsAreZeroForTarget(Kind))) |
| return llvm::DenormalMode::getPreserveSign(); |
| |
| return llvm::DenormalMode::getIEEE(); |
| } |
| |
| const StringRef GpuArch = getGPUArch(DriverArgs); |
| auto Kind = llvm::AMDGPU::parseArchAMDGCN(GpuArch); |
| |
| // TODO: There are way too many flags that change this. Do we need to check |
| // them all? |
| bool DAZ = DriverArgs.hasArg(options::OPT_cl_denorms_are_zero) || |
| getDefaultDenormsAreZeroForTarget(Kind); |
| |
| // Outputs are flushed to zero (FTZ), preserving sign. Denormal inputs are |
| // also implicit treated as zero (DAZ). |
| return DAZ ? llvm::DenormalMode::getPreserveSign() : |
| llvm::DenormalMode::getIEEE(); |
| } |
| |
| bool AMDGPUToolChain::isWave64(const llvm::opt::ArgList &DriverArgs, |
| llvm::AMDGPU::GPUKind Kind) { |
| const unsigned ArchAttr = llvm::AMDGPU::getArchAttrAMDGCN(Kind); |
| bool HasWave32 = (ArchAttr & llvm::AMDGPU::FEATURE_WAVE32); |
| |
| return !HasWave32 || DriverArgs.hasFlag( |
| options::OPT_mwavefrontsize64, options::OPT_mno_wavefrontsize64, false); |
| } |
| |
| |
| /// ROCM Toolchain |
| ROCMToolChain::ROCMToolChain(const Driver &D, const llvm::Triple &Triple, |
| const ArgList &Args) |
| : AMDGPUToolChain(D, Triple, Args) { |
| RocmInstallation.detectDeviceLibrary(); |
| } |
| |
| void AMDGPUToolChain::addClangTargetOptions( |
| const llvm::opt::ArgList &DriverArgs, |
| llvm::opt::ArgStringList &CC1Args, |
| Action::OffloadKind DeviceOffloadingKind) const { |
| // Default to "hidden" visibility, as object level linking will not be |
| // supported for the foreseeable future. |
| if (!DriverArgs.hasArg(options::OPT_fvisibility_EQ, |
| options::OPT_fvisibility_ms_compat)) { |
| CC1Args.push_back("-fvisibility"); |
| CC1Args.push_back("hidden"); |
| CC1Args.push_back("-fapply-global-visibility-to-externs"); |
| } |
| } |
| |
| StringRef |
| AMDGPUToolChain::getGPUArch(const llvm::opt::ArgList &DriverArgs) const { |
| return getProcessorFromTargetID( |
| getTriple(), DriverArgs.getLastArgValue(options::OPT_mcpu_EQ)); |
| } |
| |
| void AMDGPUToolChain::checkTargetID( |
| const llvm::opt::ArgList &DriverArgs) const { |
| StringRef TargetID = DriverArgs.getLastArgValue(options::OPT_mcpu_EQ); |
| if (TargetID.empty()) |
| return; |
| |
| llvm::StringMap<bool> FeatureMap; |
| auto OptionalGpuArch = parseTargetID(getTriple(), TargetID, &FeatureMap); |
| if (!OptionalGpuArch) { |
| getDriver().Diag(clang::diag::err_drv_bad_target_id) << TargetID; |
| } |
| } |
| |
| void ROCMToolChain::addClangTargetOptions( |
| const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args, |
| Action::OffloadKind DeviceOffloadingKind) const { |
| AMDGPUToolChain::addClangTargetOptions(DriverArgs, CC1Args, |
| DeviceOffloadingKind); |
| |
| // For the OpenCL case where there is no offload target, accept -nostdlib to |
| // disable bitcode linking. |
| if (DeviceOffloadingKind == Action::OFK_None && |
| DriverArgs.hasArg(options::OPT_nostdlib)) |
| return; |
| |
| if (DriverArgs.hasArg(options::OPT_nogpulib)) |
| return; |
| |
| if (!RocmInstallation.hasDeviceLibrary()) { |
| getDriver().Diag(diag::err_drv_no_rocm_device_lib) << 0; |
| return; |
| } |
| |
| // Get the device name and canonicalize it |
| const StringRef GpuArch = getGPUArch(DriverArgs); |
| auto Kind = llvm::AMDGPU::parseArchAMDGCN(GpuArch); |
| const StringRef CanonArch = llvm::AMDGPU::getArchNameAMDGCN(Kind); |
| std::string LibDeviceFile = RocmInstallation.getLibDeviceFile(CanonArch); |
| if (LibDeviceFile.empty()) { |
| getDriver().Diag(diag::err_drv_no_rocm_device_lib) << 1 << GpuArch; |
| return; |
| } |
| |
| bool Wave64 = isWave64(DriverArgs, Kind); |
| |
| // TODO: There are way too many flags that change this. Do we need to check |
| // them all? |
| bool DAZ = DriverArgs.hasArg(options::OPT_cl_denorms_are_zero) || |
| getDefaultDenormsAreZeroForTarget(Kind); |
| bool FiniteOnly = DriverArgs.hasArg(options::OPT_cl_finite_math_only); |
| |
| bool UnsafeMathOpt = |
| DriverArgs.hasArg(options::OPT_cl_unsafe_math_optimizations); |
| bool FastRelaxedMath = DriverArgs.hasArg(options::OPT_cl_fast_relaxed_math); |
| bool CorrectSqrt = |
| DriverArgs.hasArg(options::OPT_cl_fp32_correctly_rounded_divide_sqrt); |
| |
| // Add the OpenCL specific bitcode library. |
| llvm::SmallVector<std::string, 12> BCLibs; |
| BCLibs.push_back(RocmInstallation.getOpenCLPath().str()); |
| |
| // Add the generic set of libraries. |
| BCLibs.append(RocmInstallation.getCommonBitcodeLibs( |
| DriverArgs, LibDeviceFile, Wave64, DAZ, FiniteOnly, UnsafeMathOpt, |
| FastRelaxedMath, CorrectSqrt)); |
| |
| llvm::for_each(BCLibs, [&](StringRef BCFile) { |
| CC1Args.push_back("-mlink-builtin-bitcode"); |
| CC1Args.push_back(DriverArgs.MakeArgString(BCFile)); |
| }); |
| } |
| |
| llvm::SmallVector<std::string, 12> |
| RocmInstallationDetector::getCommonBitcodeLibs( |
| const llvm::opt::ArgList &DriverArgs, StringRef LibDeviceFile, bool Wave64, |
| bool DAZ, bool FiniteOnly, bool UnsafeMathOpt, bool FastRelaxedMath, |
| bool CorrectSqrt) const { |
| |
| llvm::SmallVector<std::string, 12> BCLibs; |
| |
| auto AddBCLib = [&](StringRef BCFile) { BCLibs.push_back(BCFile.str()); }; |
| |
| AddBCLib(getOCMLPath()); |
| AddBCLib(getOCKLPath()); |
| AddBCLib(getDenormalsAreZeroPath(DAZ)); |
| AddBCLib(getUnsafeMathPath(UnsafeMathOpt || FastRelaxedMath)); |
| AddBCLib(getFiniteOnlyPath(FiniteOnly || FastRelaxedMath)); |
| AddBCLib(getCorrectlyRoundedSqrtPath(CorrectSqrt)); |
| AddBCLib(getWavefrontSize64Path(Wave64)); |
| AddBCLib(LibDeviceFile); |
| |
| return BCLibs; |
| } |
| |
| bool AMDGPUToolChain::shouldSkipArgument(const llvm::opt::Arg *A) const { |
| Option O = A->getOption(); |
| if (O.matches(options::OPT_fPIE) || O.matches(options::OPT_fpie)) |
| return true; |
| return false; |
| } |
