forked from OSchip/llvm-project
[Clang][OpenMP] Add partial support for Static Device Libraries
An archive containing device code object files can be passed to clang command line for linking. For each given offload target it creates a device specific archives which is either passed to llvm-link if the target is amdgpu, or to clang-nvlink-wrapper if the target is nvptx. -L/-l flags are used to specify these fat archives on the command line. E.g. clang++ -fopenmp -fopenmp-targets=nvptx64 main.cpp -L. -lmylib It currently doesn't support linking an archive directly, like: clang++ -fopenmp -fopenmp-targets=nvptx64 main.cpp libmylib.a Linking with x86 offload also does not work. Reviewed By: ye-luo Differential Revision: https://reviews.llvm.org/D105191
This commit is contained in:
Saiyedul Islam
parent
dcb0e687fa
commit
35ebe4cc24
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@ -114,6 +114,10 @@ const char *AMDGCN::OpenMPLinker::constructLLVMLinkCommand(
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}
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}
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AddStaticDeviceLibsLinking(C, *this, JA, Inputs, Args, CmdArgs, "amdgcn",
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SubArchName,
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/* bitcode SDL?*/ true,
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/* PostClang Link? */ false);
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// Add an intermediate output file.
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CmdArgs.push_back("-o");
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const char *OutputFileName =
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@ -7745,12 +7745,28 @@ void OffloadBundler::ConstructJob(Compilation &C, const JobAction &JA,
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Triples += Action::GetOffloadKindName(CurKind);
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Triples += '-';
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Triples += CurTC->getTriple().normalize();
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if ((CurKind == Action::OFK_HIP || CurKind == Action::OFK_OpenMP ||
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CurKind == Action::OFK_Cuda) &&
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if ((CurKind == Action::OFK_HIP || CurKind == Action::OFK_Cuda) &&
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CurDep->getOffloadingArch()) {
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Triples += '-';
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Triples += CurDep->getOffloadingArch();
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}
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// TODO: Replace parsing of -march flag. Can be done by storing GPUArch
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// with each toolchain.
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StringRef GPUArchName;
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if (CurKind == Action::OFK_OpenMP) {
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// Extract GPUArch from -march argument in TC argument list.
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for (unsigned ArgIndex = 0; ArgIndex < TCArgs.size(); ArgIndex++) {
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auto ArchStr = StringRef(TCArgs.getArgString(ArgIndex));
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auto Arch = ArchStr.startswith_insensitive("-march=");
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if (Arch) {
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GPUArchName = ArchStr.substr(7);
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Triples += "-";
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break;
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}
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}
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Triples += GPUArchName.str();
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}
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}
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CmdArgs.push_back(TCArgs.MakeArgString(Triples));
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@ -7824,12 +7840,27 @@ void OffloadBundler::ConstructJobMultipleOutputs(
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Triples += '-';
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Triples += Dep.DependentToolChain->getTriple().normalize();
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if ((Dep.DependentOffloadKind == Action::OFK_HIP ||
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Dep.DependentOffloadKind == Action::OFK_OpenMP ||
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Dep.DependentOffloadKind == Action::OFK_Cuda) &&
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!Dep.DependentBoundArch.empty()) {
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Triples += '-';
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Triples += Dep.DependentBoundArch;
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}
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// TODO: Replace parsing of -march flag. Can be done by storing GPUArch
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// with each toolchain.
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StringRef GPUArchName;
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if (Dep.DependentOffloadKind == Action::OFK_OpenMP) {
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// Extract GPUArch from -march argument in TC argument list.
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for (unsigned ArgIndex = 0; ArgIndex < TCArgs.size(); ArgIndex++) {
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StringRef ArchStr = StringRef(TCArgs.getArgString(ArgIndex));
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auto Arch = ArchStr.startswith_insensitive("-march=");
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if (Arch) {
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GPUArchName = ArchStr.substr(7);
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Triples += "-";
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break;
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}
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}
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Triples += GPUArchName.str();
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}
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}
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CmdArgs.push_back(TCArgs.MakeArgString(Triples));
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@ -34,6 +34,7 @@
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#include "clang/Driver/Util.h"
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#include "clang/Driver/XRayArgs.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/SmallSet.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/ADT/StringSwitch.h"
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@ -1587,6 +1588,292 @@ void tools::addX86AlignBranchArgs(const Driver &D, const ArgList &Args,
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}
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}
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/// SDLSearch: Search for Static Device Library
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/// The search for SDL bitcode files is consistent with how static host
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/// libraries are discovered. That is, the -l option triggers a search for
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/// files in a set of directories called the LINKPATH. The host library search
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/// procedure looks for a specific filename in the LINKPATH. The filename for
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/// a host library is lib<libname>.a or lib<libname>.so. For SDLs, there is an
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/// ordered-set of filenames that are searched. We call this ordered-set of
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/// filenames as SEARCH-ORDER. Since an SDL can either be device-type specific,
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/// architecture specific, or generic across all architectures, a naming
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/// convention and search order is used where the file name embeds the
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/// architecture name <arch-name> (nvptx or amdgcn) and the GPU device type
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/// <device-name> such as sm_30 and gfx906. <device-name> is absent in case of
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/// device-independent SDLs. To reduce congestion in host library directories,
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/// the search first looks for files in the “libdevice” subdirectory. SDLs that
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/// are bc files begin with the prefix “lib”.
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///
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/// Machine-code SDLs can also be managed as an archive (*.a file). The
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/// convention has been to use the prefix “lib”. To avoid confusion with host
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/// archive libraries, we use prefix "libbc-" for the bitcode SDL archives.
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///
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bool tools::SDLSearch(const Driver &D, const llvm::opt::ArgList &DriverArgs,
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llvm::opt::ArgStringList &CC1Args,
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SmallVector<std::string, 8> LibraryPaths, std::string Lib,
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StringRef Arch, StringRef Target, bool isBitCodeSDL,
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bool postClangLink) {
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SmallVector<std::string, 12> SDLs;
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std::string LibDeviceLoc = "/libdevice";
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std::string LibBcPrefix = "/libbc-";
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std::string LibPrefix = "/lib";
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if (isBitCodeSDL) {
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// SEARCH-ORDER for Bitcode SDLs:
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// libdevice/libbc-<libname>-<arch-name>-<device-type>.a
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// libbc-<libname>-<arch-name>-<device-type>.a
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// libdevice/libbc-<libname>-<arch-name>.a
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// libbc-<libname>-<arch-name>.a
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// libdevice/libbc-<libname>.a
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// libbc-<libname>.a
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// libdevice/lib<libname>-<arch-name>-<device-type>.bc
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// lib<libname>-<arch-name>-<device-type>.bc
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// libdevice/lib<libname>-<arch-name>.bc
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// lib<libname>-<arch-name>.bc
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// libdevice/lib<libname>.bc
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// lib<libname>.bc
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for (StringRef Base : {LibBcPrefix, LibPrefix}) {
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const auto *Ext = Base.contains(LibBcPrefix) ? ".a" : ".bc";
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for (auto Suffix : {Twine(Lib + "-" + Arch + "-" + Target).str(),
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Twine(Lib + "-" + Arch).str(), Twine(Lib).str()}) {
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SDLs.push_back(Twine(LibDeviceLoc + Base + Suffix + Ext).str());
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SDLs.push_back(Twine(Base + Suffix + Ext).str());
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}
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}
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} else {
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// SEARCH-ORDER for Machine-code SDLs:
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// libdevice/lib<libname>-<arch-name>-<device-type>.a
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// lib<libname>-<arch-name>-<device-type>.a
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// libdevice/lib<libname>-<arch-name>.a
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// lib<libname>-<arch-name>.a
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const auto *Ext = ".a";
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for (auto Suffix : {Twine(Lib + "-" + Arch + "-" + Target).str(),
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Twine(Lib + "-" + Arch).str()}) {
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SDLs.push_back(Twine(LibDeviceLoc + LibPrefix + Suffix + Ext).str());
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SDLs.push_back(Twine(LibPrefix + Suffix + Ext).str());
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}
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}
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// The CUDA toolchain does not use a global device llvm-link before the LLVM
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// backend generates ptx. So currently, the use of bitcode SDL for nvptx is
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// only possible with post-clang-cc1 linking. Clang cc1 has a feature that
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// will link libraries after clang compilation while the LLVM IR is still in
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// memory. This utilizes a clang cc1 option called “-mlink-builtin-bitcode”.
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// This is a clang -cc1 option that is generated by the clang driver. The
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// option value must a full path to an existing file.
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bool FoundSDL = false;
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for (auto LPath : LibraryPaths) {
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for (auto SDL : SDLs) {
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auto FullName = Twine(LPath + SDL).str();
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if (llvm::sys::fs::exists(FullName)) {
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if (postClangLink)
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CC1Args.push_back("-mlink-builtin-bitcode");
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CC1Args.push_back(DriverArgs.MakeArgString(FullName));
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FoundSDL = true;
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break;
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}
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}
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if (FoundSDL)
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break;
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}
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return FoundSDL;
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}
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/// Search if a user provided archive file lib<libname>.a exists in any of
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/// the library paths. If so, add a new command to clang-offload-bundler to
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/// unbundle this archive and create a temporary device specific archive. Name
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/// of this SDL is passed to the llvm-link (for amdgcn) or to the
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/// clang-nvlink-wrapper (for nvptx) commands by the driver.
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bool tools::GetSDLFromOffloadArchive(
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Compilation &C, const Driver &D, const Tool &T, const JobAction &JA,
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const InputInfoList &Inputs, const llvm::opt::ArgList &DriverArgs,
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llvm::opt::ArgStringList &CC1Args, SmallVector<std::string, 8> LibraryPaths,
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StringRef Lib, StringRef Arch, StringRef Target, bool isBitCodeSDL,
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bool postClangLink) {
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// We don't support bitcode archive bundles for nvptx
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if (isBitCodeSDL && Arch.contains("nvptx"))
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return false;
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bool FoundAOB = false;
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SmallVector<std::string, 2> AOBFileNames;
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std::string ArchiveOfBundles;
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for (auto LPath : LibraryPaths) {
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ArchiveOfBundles.clear();
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AOBFileNames.push_back(Twine(LPath + "/libdevice/lib" + Lib + ".a").str());
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AOBFileNames.push_back(Twine(LPath + "/lib" + Lib + ".a").str());
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for (auto AOB : AOBFileNames) {
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if (llvm::sys::fs::exists(AOB)) {
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ArchiveOfBundles = AOB;
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FoundAOB = true;
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break;
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}
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}
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if (!FoundAOB)
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continue;
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StringRef Prefix = isBitCodeSDL ? "libbc-" : "lib";
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std::string OutputLib = D.GetTemporaryPath(
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Twine(Prefix + Lib + "-" + Arch + "-" + Target).str(), "a");
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C.addTempFile(C.getArgs().MakeArgString(OutputLib.c_str()));
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ArgStringList CmdArgs;
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SmallString<128> DeviceTriple;
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DeviceTriple += Action::GetOffloadKindName(JA.getOffloadingDeviceKind());
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DeviceTriple += '-';
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std::string NormalizedTriple = T.getToolChain().getTriple().normalize();
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DeviceTriple += NormalizedTriple;
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if (!Target.empty()) {
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DeviceTriple += '-';
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DeviceTriple += Target;
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}
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std::string UnbundleArg("-unbundle");
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std::string TypeArg("-type=a");
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std::string InputArg("-inputs=" + ArchiveOfBundles);
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std::string OffloadArg("-targets=" + std::string(DeviceTriple));
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std::string OutputArg("-outputs=" + OutputLib);
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const char *UBProgram = DriverArgs.MakeArgString(
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T.getToolChain().GetProgramPath("clang-offload-bundler"));
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ArgStringList UBArgs;
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UBArgs.push_back(C.getArgs().MakeArgString(UnbundleArg.c_str()));
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UBArgs.push_back(C.getArgs().MakeArgString(TypeArg.c_str()));
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UBArgs.push_back(C.getArgs().MakeArgString(InputArg.c_str()));
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UBArgs.push_back(C.getArgs().MakeArgString(OffloadArg.c_str()));
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UBArgs.push_back(C.getArgs().MakeArgString(OutputArg.c_str()));
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// Add this flag to not exit from clang-offload-bundler if no compatible
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// code object is found in heterogenous archive library.
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std::string AdditionalArgs("-allow-missing-bundles");
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UBArgs.push_back(C.getArgs().MakeArgString(AdditionalArgs.c_str()));
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C.addCommand(std::make_unique<Command>(
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JA, T, ResponseFileSupport::AtFileCurCP(), UBProgram, UBArgs, Inputs,
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InputInfo(&JA, C.getArgs().MakeArgString(OutputLib.c_str()))));
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if (postClangLink)
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CC1Args.push_back("-mlink-builtin-bitcode");
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CC1Args.push_back(DriverArgs.MakeArgString(OutputLib));
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break;
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}
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return FoundAOB;
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}
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// Wrapper function used by driver for adding SDLs during link phase.
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void tools::AddStaticDeviceLibsLinking(Compilation &C, const Tool &T,
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const JobAction &JA,
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const InputInfoList &Inputs,
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const llvm::opt::ArgList &DriverArgs,
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llvm::opt::ArgStringList &CC1Args,
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StringRef Arch, StringRef Target,
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bool isBitCodeSDL, bool postClangLink) {
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AddStaticDeviceLibs(&C, &T, &JA, &Inputs, C.getDriver(), DriverArgs, CC1Args,
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Arch, Target, isBitCodeSDL, postClangLink);
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}
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// Wrapper function used for post clang linking of bitcode SDLS for nvptx by
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// the CUDA toolchain.
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void tools::AddStaticDeviceLibsPostLinking(const Driver &D,
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const llvm::opt::ArgList &DriverArgs,
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llvm::opt::ArgStringList &CC1Args,
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StringRef Arch, StringRef Target,
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bool isBitCodeSDL, bool postClangLink) {
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AddStaticDeviceLibs(nullptr, nullptr, nullptr, nullptr, D, DriverArgs,
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CC1Args, Arch, Target, isBitCodeSDL, postClangLink);
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}
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// User defined Static Device Libraries(SDLs) can be passed to clang for
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// offloading GPU compilers. Like static host libraries, the use of a SDL is
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// specified with the -l command line option. The primary difference between
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// host and SDLs is the filenames for SDLs (refer SEARCH-ORDER for Bitcode SDLs
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// and SEARCH-ORDER for Machine-code SDLs for the naming convention).
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// SDLs are of following types:
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//
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// * Bitcode SDLs: They can either be a *.bc file or an archive of *.bc files.
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// For NVPTX, these libraries are post-clang linked following each
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// compilation. For AMDGPU, these libraries are linked one time
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// during the application link phase.
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//
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// * Machine-code SDLs: They are archive files. For NVPTX, the archive members
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// contain cubin for Nvidia GPUs and are linked one time during the
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// link phase by the CUDA SDK linker called nvlink. For AMDGPU, the
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// process for machine code SDLs is still in development. But they
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// will be linked by the LLVM tool lld.
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//
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// * Bundled objects that contain both host and device codes: Bundled objects
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// may also contain library code compiled from source. For NVPTX, the
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// bundle contains cubin. For AMDGPU, the bundle contains bitcode.
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//
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// For Bitcode and Machine-code SDLs, current compiler toolchains hardcode the
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// inclusion of specific SDLs such as math libraries and the OpenMP device
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// library libomptarget.
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void tools::AddStaticDeviceLibs(Compilation *C, const Tool *T,
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const JobAction *JA,
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const InputInfoList *Inputs, const Driver &D,
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const llvm::opt::ArgList &DriverArgs,
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llvm::opt::ArgStringList &CC1Args,
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StringRef Arch, StringRef Target,
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bool isBitCodeSDL, bool postClangLink) {
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SmallVector<std::string, 8> LibraryPaths;
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// Add search directories from LIBRARY_PATH env variable
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llvm::Optional<std::string> LibPath =
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llvm::sys::Process::GetEnv("LIBRARY_PATH");
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if (LibPath) {
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SmallVector<StringRef, 8> Frags;
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const char EnvPathSeparatorStr[] = {llvm::sys::EnvPathSeparator, '\0'};
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llvm::SplitString(*LibPath, Frags, EnvPathSeparatorStr);
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for (StringRef Path : Frags)
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LibraryPaths.emplace_back(Path.trim());
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}
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// Add directories from user-specified -L options
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for (std::string Search_Dir : DriverArgs.getAllArgValues(options::OPT_L))
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LibraryPaths.emplace_back(Search_Dir);
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// Add path to lib-debug folders
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SmallString<256> DefaultLibPath = llvm::sys::path::parent_path(D.Dir);
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llvm::sys::path::append(DefaultLibPath, Twine("lib") + CLANG_LIBDIR_SUFFIX);
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LibraryPaths.emplace_back(DefaultLibPath.c_str());
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// Build list of Static Device Libraries SDLs specified by -l option
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llvm::SmallSet<std::string, 16> SDLNames;
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static const StringRef HostOnlyArchives[] = {
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"omp", "cudart", "m", "gcc", "gcc_s", "pthread", "hip_hcc"};
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for (auto SDLName : DriverArgs.getAllArgValues(options::OPT_l)) {
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if (!HostOnlyArchives->contains(SDLName)) {
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SDLNames.insert(SDLName);
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}
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}
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// The search stops as soon as an SDL file is found. The driver then provides
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// the full filename of the SDL to the llvm-link or clang-nvlink-wrapper
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// command. If no SDL is found after searching each LINKPATH with
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// SEARCH-ORDER, it is possible that an archive file lib<libname>.a exists
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// and may contain bundled object files.
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for (auto SDLName : SDLNames) {
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// This is the only call to SDLSearch
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if (!SDLSearch(D, DriverArgs, CC1Args, LibraryPaths, SDLName, Arch, Target,
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isBitCodeSDL, postClangLink)) {
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GetSDLFromOffloadArchive(*C, D, *T, *JA, *Inputs, DriverArgs, CC1Args,
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LibraryPaths, SDLName, Arch, Target,
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isBitCodeSDL, postClangLink);
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}
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}
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}
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static llvm::opt::Arg *
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getAMDGPUCodeObjectArgument(const Driver &D, const llvm::opt::ArgList &Args) {
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// The last of -mcode-object-v3, -mno-code-object-v3 and
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@ -49,6 +49,39 @@ void AddRunTimeLibs(const ToolChain &TC, const Driver &D,
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llvm::opt::ArgStringList &CmdArgs,
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const llvm::opt::ArgList &Args);
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void AddStaticDeviceLibsLinking(Compilation &C, const Tool &T,
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const JobAction &JA,
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const InputInfoList &Inputs,
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const llvm::opt::ArgList &DriverArgs,
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llvm::opt::ArgStringList &CmdArgs,
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StringRef Arch, StringRef Target,
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bool isBitCodeSDL, bool postClangLink);
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void AddStaticDeviceLibsPostLinking(const Driver &D,
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const llvm::opt::ArgList &DriverArgs,
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llvm::opt::ArgStringList &CmdArgs,
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StringRef Arch, StringRef Target,
|
||||
bool isBitCodeSDL, bool postClangLink);
|
||||
void AddStaticDeviceLibs(Compilation *C, const Tool *T, const JobAction *JA,
|
||||
const InputInfoList *Inputs, const Driver &D,
|
||||
const llvm::opt::ArgList &DriverArgs,
|
||||
llvm::opt::ArgStringList &CmdArgs, StringRef Arch,
|
||||
StringRef Target, bool isBitCodeSDL,
|
||||
bool postClangLink);
|
||||
|
||||
bool SDLSearch(const Driver &D, const llvm::opt::ArgList &DriverArgs,
|
||||
llvm::opt::ArgStringList &CmdArgs,
|
||||
SmallVector<std::string, 8> LibraryPaths, std::string Lib,
|
||||
StringRef Arch, StringRef Target, bool isBitCodeSDL,
|
||||
bool postClangLink);
|
||||
|
||||
bool GetSDLFromOffloadArchive(Compilation &C, const Driver &D, const Tool &T,
|
||||
const JobAction &JA, const InputInfoList &Inputs,
|
||||
const llvm::opt::ArgList &DriverArgs,
|
||||
llvm::opt::ArgStringList &CC1Args,
|
||||
SmallVector<std::string, 8> LibraryPaths,
|
||||
StringRef Lib, StringRef Arch, StringRef Target,
|
||||
bool isBitCodeSDL, bool postClangLink);
|
||||
|
||||
const char *SplitDebugName(const JobAction &JA, const llvm::opt::ArgList &Args,
|
||||
const InputInfo &Input, const InputInfo &Output);
|
||||
|
||||
|
|
|
|||
|
|
@ -610,8 +610,11 @@ void NVPTX::OpenMPLinker::ConstructJob(Compilation &C, const JobAction &JA,
|
|||
CmdArgs.push_back(CubinF);
|
||||
}
|
||||
|
||||
AddStaticDeviceLibsLinking(C, *this, JA, Inputs, Args, CmdArgs, "nvptx", GPUArch,
|
||||
false, false);
|
||||
|
||||
const char *Exec =
|
||||
Args.MakeArgString(getToolChain().GetProgramPath("nvlink"));
|
||||
Args.MakeArgString(getToolChain().GetProgramPath("clang-nvlink-wrapper"));
|
||||
C.addCommand(std::make_unique<Command>(
|
||||
JA, *this,
|
||||
ResponseFileSupport{ResponseFileSupport::RF_Full, llvm::sys::WEM_UTF8,
|
||||
|
|
@ -741,6 +744,8 @@ void CudaToolChain::addClangTargetOptions(
|
|||
|
||||
addOpenMPDeviceRTL(getDriver(), DriverArgs, CC1Args, BitcodeSuffix,
|
||||
getTriple());
|
||||
AddStaticDeviceLibsPostLinking(getDriver(), DriverArgs, CC1Args, "nvptx", GpuArch,
|
||||
/* bitcode SDL?*/ true, /* PostClang Link? */ true);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -0,0 +1,80 @@
|
|||
// REQUIRES: clang-driver
|
||||
// REQUIRES: x86-registered-target
|
||||
// REQUIRES: amdgpu-registered-target
|
||||
|
||||
// See the steps to create a fat archive are given at the end of the file.
|
||||
|
||||
// Given a FatArchive, clang-offload-bundler should be called to create a
|
||||
// device specific archive, which should be passed to llvm-link.
|
||||
// RUN: %clang -O2 -### -fopenmp -fopenmp-targets=amdgcn-amd-amdhsa -Xopenmp-target=amdgcn-amd-amdhsa -march=gfx906 %s -L%S/Inputs/openmp_static_device_link -lFatArchive 2>&1 | FileCheck %s
|
||||
// CHECK: clang{{.*}}"-cc1"{{.*}}"-triple" "amdgcn-amd-amdhsa"{{.*}}"-emit-llvm-bc"{{.*}}"-target-cpu" "[[GPU:gfx[0-9]+]]"{{.*}}"-o" "[[HOSTBC:.*.bc]]" "-x" "c++"{{.*}}.cpp
|
||||
// CHECK: clang-offload-bundler" "-unbundle" "-type=a" "-inputs={{.*}}/Inputs/openmp_static_device_link/libFatArchive.a" "-targets=openmp-amdgcn-amd-amdhsa-[[GPU]]" "-outputs=[[DEVICESPECIFICARCHIVE:.*.a]]" "-allow-missing-bundles"
|
||||
// CHECK: llvm-link{{.*}}"[[HOSTBC]]" "[[DEVICESPECIFICARCHIVE]]" "-o" "{{.*}}-[[GPU]]-linked-{{.*}}.bc"
|
||||
// expected-no-diagnostics
|
||||
|
||||
#ifndef HEADER
|
||||
#define HEADER
|
||||
|
||||
#define N 10
|
||||
|
||||
#pragma omp declare target
|
||||
// Functions defined in Fat Archive.
|
||||
extern "C" void func_present(float *, float *, unsigned);
|
||||
|
||||
#ifdef MISSING
|
||||
// Function not defined in the fat archive.
|
||||
extern "C" void func_missing(float *, float *, unsigned);
|
||||
#endif
|
||||
|
||||
#pragma omp end declare target
|
||||
|
||||
int main() {
|
||||
float in[N], out[N], sum = 0;
|
||||
unsigned i;
|
||||
|
||||
#pragma omp parallel for
|
||||
for (i = 0; i < N; ++i) {
|
||||
in[i] = i;
|
||||
}
|
||||
|
||||
func_present(in, out, N); // Returns out[i] = a[i] * 0
|
||||
|
||||
#ifdef MISSING
|
||||
func_missing(in, out, N); // Should throw an error here
|
||||
#endif
|
||||
|
||||
#pragma omp parallel for reduction(+ \
|
||||
: sum)
|
||||
for (i = 0; i < N; ++i)
|
||||
sum += out[i];
|
||||
|
||||
if (!sum)
|
||||
return 0;
|
||||
return sum;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
/***********************************************
|
||||
Steps to create Fat Archive (libFatArchive.a)
|
||||
************************************************
|
||||
***************** File: func_1.c ***************
|
||||
void func_present(float* in, float* out, unsigned n){
|
||||
unsigned i;
|
||||
#pragma omp target teams distribute parallel for map(to: in[0:n]) map(from: out[0:n])
|
||||
for(i=0; i<n; ++i){
|
||||
out[i] = in[i] * 0;
|
||||
}
|
||||
}
|
||||
*************************************************
|
||||
1. Compile source file(s) to generate object file(s)
|
||||
clang -O2 -fopenmp -fopenmp-targets=amdgcn-amd-amdhsa -Xopenmp-target=amdgcn-amd-amdhsa -march=gfx906 -c func_1.c -o func_1_gfx906.o
|
||||
clang -O2 -fopenmp -fopenmp-targets=amdgcn-amd-amdhsa -Xopenmp-target=amdgcn-amd-amdhsa -march=gfx908 -c func_1.c -o func_1_gfx908.o
|
||||
clang -O2 -fopenmp -fopenmp-targets=amdgcn-amd-amdhsa -Xopenmp-target=amdgcn-amd-amdhsa -march=gfx906 -c func_2.c -o func_2_gfx906.o
|
||||
clang -O2 -fopenmp -fopenmp-targets=amdgcn-amd-amdhsa -Xopenmp-target=amdgcn-amd-amdhsa -march=gfx908 -c func_2.c -o func_2_gfx908.o
|
||||
clang -O2 -fopenmp -fopenmp-targets=nvptx64 -c func_1.c -o func_1_nvptx.o
|
||||
clang -O2 -fopenmp -fopenmp-targets=nvptx64 -c func_2.c -o func_2_nvptx.o
|
||||
|
||||
2. Create a fat archive by combining all the object file(s)
|
||||
llvm-ar cr libFatArchive.a func_1_gfx906.o func_1_gfx908.o func_2_gfx906.o func_2_gfx908.o func_1_nvptx.o func_2_nvptx.o
|
||||
************************************************/
|
||||
|
|
@ -0,0 +1,80 @@
|
|||
// REQUIRES: clang-driver
|
||||
// REQUIRES: x86-registered-target
|
||||
// REQUIRES: nvptx-registered-target
|
||||
|
||||
// See the steps to create a fat archive are given at the end of the file.
|
||||
|
||||
// Given a FatArchive, clang-offload-bundler should be called to create a
|
||||
// device specific archive, which should be passed to clang-nvlink-wrapper.
|
||||
// RUN: %clang -O2 -### -fopenmp -fopenmp-targets=nvptx64 %s -L%S/Inputs/openmp_static_device_link -lFatArchive 2>&1 | FileCheck %s
|
||||
// CHECK: clang{{.*}}"-cc1"{{.*}}"-triple" "nvptx64"{{.*}}"-target-cpu" "[[GPU:sm_[0-9]+]]"{{.*}}"-o" "[[HOSTBC:.*.s]]" "-x" "c++"{{.*}}.cpp
|
||||
// CHECK: clang-offload-bundler" "-unbundle" "-type=a" "-inputs={{.*}}/Inputs/openmp_static_device_link/libFatArchive.a" "-targets=openmp-nvptx64-[[GPU]]" "-outputs=[[DEVICESPECIFICARCHIVE:.*.a]]" "-allow-missing-bundles"
|
||||
// CHECK: clang-nvlink-wrapper{{.*}}"-o" "{{.*}}.out" "-arch" "[[GPU]]" "{{.*}}[[DEVICESPECIFICARCHIVE]]"
|
||||
// expected-no-diagnostics
|
||||
|
||||
#ifndef HEADER
|
||||
#define HEADER
|
||||
|
||||
#define N 10
|
||||
|
||||
#pragma omp declare target
|
||||
// Functions defined in Fat Archive.
|
||||
extern "C" void func_present(float *, float *, unsigned);
|
||||
|
||||
#ifdef MISSING
|
||||
// Function not defined in the fat archive.
|
||||
extern "C" void func_missing(float *, float *, unsigned);
|
||||
#endif
|
||||
|
||||
#pragma omp end declare target
|
||||
|
||||
int main() {
|
||||
float in[N], out[N], sum = 0;
|
||||
unsigned i;
|
||||
|
||||
#pragma omp parallel for
|
||||
for (i = 0; i < N; ++i) {
|
||||
in[i] = i;
|
||||
}
|
||||
|
||||
func_present(in, out, N); // Returns out[i] = a[i] * 0
|
||||
|
||||
#ifdef MISSING
|
||||
func_missing(in, out, N); // Should throw an error here
|
||||
#endif
|
||||
|
||||
#pragma omp parallel for reduction(+ \
|
||||
: sum)
|
||||
for (i = 0; i < N; ++i)
|
||||
sum += out[i];
|
||||
|
||||
if (!sum)
|
||||
return 0;
|
||||
return sum;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
/***********************************************
|
||||
Steps to create Fat Archive (libFatArchive.a)
|
||||
************************************************
|
||||
***************** File: func_1.c ***************
|
||||
void func_present(float* in, float* out, unsigned n){
|
||||
unsigned i;
|
||||
#pragma omp target teams distribute parallel for map(to: in[0:n]) map(from: out[0:n])
|
||||
for(i=0; i<n; ++i){
|
||||
out[i] = in[i] * 0;
|
||||
}
|
||||
}
|
||||
*************************************************
|
||||
1. Compile source file(s) to generate object file(s)
|
||||
clang -O2 -fopenmp -fopenmp-targets=amdgcn-amd-amdhsa -Xopenmp-target=amdgcn-amd-amdhsa -march=gfx906 -c func_1.c -o func_1_gfx906.o
|
||||
clang -O2 -fopenmp -fopenmp-targets=amdgcn-amd-amdhsa -Xopenmp-target=amdgcn-amd-amdhsa -march=gfx908 -c func_1.c -o func_1_gfx908.o
|
||||
clang -O2 -fopenmp -fopenmp-targets=amdgcn-amd-amdhsa -Xopenmp-target=amdgcn-amd-amdhsa -march=gfx906 -c func_2.c -o func_2_gfx906.o
|
||||
clang -O2 -fopenmp -fopenmp-targets=amdgcn-amd-amdhsa -Xopenmp-target=amdgcn-amd-amdhsa -march=gfx908 -c func_2.c -o func_2_gfx908.o
|
||||
clang -O2 -fopenmp -fopenmp-targets=nvptx64 -c func_1.c -o func_1_nvptx.o
|
||||
clang -O2 -fopenmp -fopenmp-targets=nvptx64 -c func_2.c -o func_2_nvptx.o
|
||||
|
||||
2. Create a fat archive by combining all the object file(s)
|
||||
llvm-ar cr libFatArchive.a func_1_gfx906.o func_1_gfx908.o func_2_gfx906.o func_2_gfx908.o func_1_nvptx.o func_2_nvptx.o
|
||||
************************************************/
|
||||
|
|
@ -180,6 +180,28 @@ struct OffloadTargetInfo {
|
|||
}
|
||||
};
|
||||
|
||||
static StringRef getDeviceFileExtension(StringRef Device) {
|
||||
if (Device.contains("gfx"))
|
||||
return ".bc";
|
||||
if (Device.contains("sm_"))
|
||||
return ".cubin";
|
||||
|
||||
WithColor::warning() << "Could not determine extension for archive"
|
||||
"members, using \".o\"\n";
|
||||
return ".o";
|
||||
}
|
||||
|
||||
static std::string getDeviceLibraryFileName(StringRef BundleFileName,
|
||||
StringRef Device) {
|
||||
StringRef LibName = sys::path::stem(BundleFileName);
|
||||
StringRef Extension = getDeviceFileExtension(Device);
|
||||
|
||||
std::string Result;
|
||||
Result += LibName;
|
||||
Result += Extension;
|
||||
return Result;
|
||||
}
|
||||
|
||||
/// Generic file handler interface.
|
||||
class FileHandler {
|
||||
public:
|
||||
|
|
@ -1229,7 +1251,9 @@ static Error UnbundleArchive() {
|
|||
BundledObjectFileName.assign(BundledObjectFile);
|
||||
auto OutputBundleName =
|
||||
Twine(llvm::sys::path::stem(BundledObjectFileName) + "-" +
|
||||
CodeObject)
|
||||
CodeObject +
|
||||
getDeviceLibraryFileName(BundledObjectFileName,
|
||||
CodeObjectInfo.GPUArch))
|
||||
.str();
|
||||
// Replace ':' in optional target feature list with '_' to ensure
|
||||
// cross-platform validity.
|
||||
|
|
|
|||
Loading…
Reference in New Issue