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llvm-project/clang/lib/Driver/ToolChains/HIP.cpp

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//===--- HIP.cpp - HIP Tool and 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 "HIP.h"
#include "AMDGPU.h"
#include "CommonArgs.h"
#include "InputInfo.h"
#include "clang/Basic/Cuda.h"
#include "clang/Driver/Compilation.h"
#include "clang/Driver/Driver.h"
#include "clang/Driver/DriverDiagnostic.h"
#include "clang/Driver/Options.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/TargetParser.h"
using namespace clang::driver;
using namespace clang::driver::toolchains;
using namespace clang::driver::tools;
using namespace clang;
using namespace llvm::opt;
#if defined(_WIN32) || defined(_WIN64)
#define NULL_FILE "nul"
#else
#define NULL_FILE "/dev/null"
#endif
namespace {
static void addBCLib(const Driver &D, const ArgList &Args,
ArgStringList &CmdArgs, ArgStringList LibraryPaths,
StringRef BCName) {
StringRef FullName;
for (std::string LibraryPath : LibraryPaths) {
SmallString<128> Path(LibraryPath);
llvm::sys::path::append(Path, BCName);
FullName = Path;
if (llvm::sys::fs::exists(FullName)) {
CmdArgs.push_back("-mlink-builtin-bitcode");
CmdArgs.push_back(Args.MakeArgString(FullName));
return;
}
}
D.Diag(diag::err_drv_no_such_file) << BCName;
}
static const char *getOutputFileName(Compilation &C, StringRef Base,
const char *Postfix,
const char *Extension) {
const char *OutputFileName;
if (C.getDriver().isSaveTempsEnabled()) {
OutputFileName =
C.getArgs().MakeArgString(Base.str() + Postfix + "." + Extension);
} else {
std::string TmpName =
C.getDriver().GetTemporaryPath(Base.str() + Postfix, Extension);
OutputFileName = C.addTempFile(C.getArgs().MakeArgString(TmpName));
}
return OutputFileName;
}
static void addOptLevelArgs(const llvm::opt::ArgList &Args,
llvm::opt::ArgStringList &CmdArgs,
bool IsLlc = false) {
if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
StringRef OOpt = "3";
if (A->getOption().matches(options::OPT_O4) ||
A->getOption().matches(options::OPT_Ofast))
OOpt = "3";
else if (A->getOption().matches(options::OPT_O0))
OOpt = "0";
else if (A->getOption().matches(options::OPT_O)) {
// Clang and opt support -Os/-Oz; llc only supports -O0, -O1, -O2 and -O3
// so we map -Os/-Oz to -O2.
// Only clang supports -Og, and maps it to -O1.
// We map anything else to -O2.
OOpt = llvm::StringSwitch<const char *>(A->getValue())
.Case("1", "1")
.Case("2", "2")
.Case("3", "3")
.Case("s", IsLlc ? "2" : "s")
.Case("z", IsLlc ? "2" : "z")
.Case("g", "1")
.Default("2");
}
CmdArgs.push_back(Args.MakeArgString("-O" + OOpt));
}
}
} // namespace
const char *AMDGCN::Linker::constructLLVMLinkCommand(
Compilation &C, const JobAction &JA, const InputInfoList &Inputs,
const ArgList &Args, StringRef SubArchName,
StringRef OutputFilePrefix) const {
ArgStringList CmdArgs;
// Add the input bc's created by compile step.
for (const auto &II : Inputs)
CmdArgs.push_back(II.getFilename());
// Add an intermediate output file.
CmdArgs.push_back("-o");
auto OutputFileName = getOutputFileName(C, OutputFilePrefix, "-linked", "bc");
CmdArgs.push_back(OutputFileName);
const char *Exec =
Args.MakeArgString(getToolChain().GetProgramPath("llvm-link"));
C.addCommand(std::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
return OutputFileName;
}
const char *AMDGCN::Linker::constructOptCommand(
Compilation &C, const JobAction &JA, const InputInfoList &Inputs,
const llvm::opt::ArgList &Args, llvm::StringRef SubArchName,
llvm::StringRef OutputFilePrefix, const char *InputFileName) const {
// Construct opt command.
ArgStringList OptArgs;
// The input to opt is the output from llvm-link.
OptArgs.push_back(InputFileName);
// Pass optimization arg to opt.
addOptLevelArgs(Args, OptArgs);
OptArgs.push_back("-mtriple=amdgcn-amd-amdhsa");
OptArgs.push_back(Args.MakeArgString("-mcpu=" + SubArchName));
for (const Arg *A : Args.filtered(options::OPT_mllvm)) {
OptArgs.push_back(A->getValue(0));
}
OptArgs.push_back("-o");
auto OutputFileName =
getOutputFileName(C, OutputFilePrefix, "-optimized", "bc");
OptArgs.push_back(OutputFileName);
const char *OptExec =
Args.MakeArgString(getToolChain().GetProgramPath("opt"));
C.addCommand(std::make_unique<Command>(JA, *this, OptExec, OptArgs, Inputs));
return OutputFileName;
}
const char *AMDGCN::Linker::constructLlcCommand(
Compilation &C, const JobAction &JA, const InputInfoList &Inputs,
const llvm::opt::ArgList &Args, llvm::StringRef SubArchName,
llvm::StringRef OutputFilePrefix, const char *InputFileName,
bool OutputIsAsm) const {
// Construct llc command.
ArgStringList LlcArgs;
// The input to llc is the output from opt.
LlcArgs.push_back(InputFileName);
// Pass optimization arg to llc.
addOptLevelArgs(Args, LlcArgs, /*IsLlc=*/true);
LlcArgs.push_back("-mtriple=amdgcn-amd-amdhsa");
LlcArgs.push_back(Args.MakeArgString("-mcpu=" + SubArchName));
LlcArgs.push_back(
Args.MakeArgString(Twine("-filetype=") + (OutputIsAsm ? "asm" : "obj")));
// Extract all the -m options
std::vector<llvm::StringRef> Features;
handleTargetFeaturesGroup(
Args, Features, options::OPT_m_amdgpu_Features_Group);
// Add features to mattr such as xnack
std::string MAttrString = "-mattr=";
for(auto OneFeature : Features) {
MAttrString.append(Args.MakeArgString(OneFeature));
if (OneFeature != Features.back())
MAttrString.append(",");
}
if(!Features.empty())
LlcArgs.push_back(Args.MakeArgString(MAttrString));
for (const Arg *A : Args.filtered(options::OPT_mllvm)) {
LlcArgs.push_back(A->getValue(0));
}
// Add output filename
LlcArgs.push_back("-o");
auto LlcOutputFile =
getOutputFileName(C, OutputFilePrefix, "", OutputIsAsm ? "s" : "o");
LlcArgs.push_back(LlcOutputFile);
const char *Llc = Args.MakeArgString(getToolChain().GetProgramPath("llc"));
C.addCommand(std::make_unique<Command>(JA, *this, Llc, LlcArgs, Inputs));
return LlcOutputFile;
}
void AMDGCN::Linker::constructLldCommand(Compilation &C, const JobAction &JA,
const InputInfoList &Inputs,
const InputInfo &Output,
const llvm::opt::ArgList &Args,
const char *InputFileName) const {
// Construct lld command.
// The output from ld.lld is an HSA code object file.
ArgStringList LldArgs{"-flavor", "gnu", "--no-undefined",
"-shared", "-o", Output.getFilename(),
InputFileName};
const char *Lld = Args.MakeArgString(getToolChain().GetProgramPath("lld"));
C.addCommand(std::make_unique<Command>(JA, *this, Lld, LldArgs, Inputs));
}
// Construct a clang-offload-bundler command to bundle code objects for
// different GPU's into a HIP fat binary.
void AMDGCN::constructHIPFatbinCommand(Compilation &C, const JobAction &JA,
StringRef OutputFileName, const InputInfoList &Inputs,
const llvm::opt::ArgList &Args, const Tool& T) {
// Construct clang-offload-bundler command to bundle object files for
// for different GPU archs.
ArgStringList BundlerArgs;
BundlerArgs.push_back(Args.MakeArgString("-type=o"));
// ToDo: Remove the dummy host binary entry which is required by
// clang-offload-bundler.
std::string BundlerTargetArg = "-targets=host-x86_64-unknown-linux";
std::string BundlerInputArg = "-inputs=" NULL_FILE;
for (const auto &II : Inputs) {
const auto* A = II.getAction();
BundlerTargetArg = BundlerTargetArg + ",hip-amdgcn-amd-amdhsa-" +
StringRef(A->getOffloadingArch()).str();
BundlerInputArg = BundlerInputArg + "," + II.getFilename();
}
BundlerArgs.push_back(Args.MakeArgString(BundlerTargetArg));
BundlerArgs.push_back(Args.MakeArgString(BundlerInputArg));
auto BundlerOutputArg = Args.MakeArgString(
std::string("-outputs=").append(std::string(OutputFileName)));
BundlerArgs.push_back(BundlerOutputArg);
const char *Bundler = Args.MakeArgString(
T.getToolChain().GetProgramPath("clang-offload-bundler"));
C.addCommand(std::make_unique<Command>(JA, T, Bundler, BundlerArgs, Inputs));
}
// For amdgcn the inputs of the linker job are device bitcode and output is
// object file. It calls llvm-link, opt, llc, then lld steps.
void AMDGCN::Linker::ConstructJob(Compilation &C, const JobAction &JA,
const InputInfo &Output,
const InputInfoList &Inputs,
const ArgList &Args,
const char *LinkingOutput) const {
if (JA.getType() == types::TY_HIP_FATBIN)
return constructHIPFatbinCommand(C, JA, Output.getFilename(), Inputs, Args, *this);
assert(getToolChain().getTriple().getArch() == llvm::Triple::amdgcn &&
"Unsupported target");
std::string SubArchName = JA.getOffloadingArch();
assert(StringRef(SubArchName).startswith("gfx") && "Unsupported sub arch");
// Prefix for temporary file name.
std::string Prefix = llvm::sys::path::stem(Inputs[0].getFilename()).str();
if (!C.getDriver().isSaveTempsEnabled())
Prefix += "-" + SubArchName;
// Each command outputs different files.
const char *LLVMLinkCommand =
constructLLVMLinkCommand(C, JA, Inputs, Args, SubArchName, Prefix);
const char *OptCommand = constructOptCommand(C, JA, Inputs, Args, SubArchName,
Prefix, LLVMLinkCommand);
if (C.getDriver().isSaveTempsEnabled())
constructLlcCommand(C, JA, Inputs, Args, SubArchName, Prefix, OptCommand,
/*OutputIsAsm=*/true);
const char *LlcCommand =
constructLlcCommand(C, JA, Inputs, Args, SubArchName, Prefix, OptCommand);
constructLldCommand(C, JA, Inputs, Output, Args, LlcCommand);
}
HIPToolChain::HIPToolChain(const Driver &D, const llvm::Triple &Triple,
const ToolChain &HostTC, const ArgList &Args)
: ROCMToolChain(D, Triple, Args), HostTC(HostTC) {
// Lookup binaries into the driver directory, this is used to
// discover the clang-offload-bundler executable.
getProgramPaths().push_back(getDriver().Dir);
}
void HIPToolChain::addClangTargetOptions(
const llvm::opt::ArgList &DriverArgs,
llvm::opt::ArgStringList &CC1Args,
Action::OffloadKind DeviceOffloadingKind) const {
HostTC.addClangTargetOptions(DriverArgs, CC1Args, DeviceOffloadingKind);
StringRef GpuArch = DriverArgs.getLastArgValue(options::OPT_march_EQ);
assert(!GpuArch.empty() && "Must have an explicit GPU arch.");
(void) GpuArch;
assert(DeviceOffloadingKind == Action::OFK_HIP &&
"Only HIP offloading kinds are supported for GPUs.");
auto Kind = llvm::AMDGPU::parseArchAMDGCN(GpuArch);
const StringRef CanonArch = llvm::AMDGPU::getArchNameAMDGCN(Kind);
CC1Args.push_back("-target-cpu");
CC1Args.push_back(DriverArgs.MakeArgStringRef(GpuArch));
CC1Args.push_back("-fcuda-is-device");
if (DriverArgs.hasFlag(options::OPT_fcuda_approx_transcendentals,
options::OPT_fno_cuda_approx_transcendentals, false))
CC1Args.push_back("-fcuda-approx-transcendentals");
if (DriverArgs.hasFlag(options::OPT_fgpu_rdc, options::OPT_fno_gpu_rdc,
false))
CC1Args.push_back("-fgpu-rdc");
StringRef MaxThreadsPerBlock =
DriverArgs.getLastArgValue(options::OPT_gpu_max_threads_per_block_EQ);
if (!MaxThreadsPerBlock.empty()) {
std::string ArgStr =
std::string("--gpu-max-threads-per-block=") + MaxThreadsPerBlock.str();
CC1Args.push_back(DriverArgs.MakeArgStringRef(ArgStr));
}
if (DriverArgs.hasFlag(options::OPT_fgpu_allow_device_init,
options::OPT_fno_gpu_allow_device_init, false))
CC1Args.push_back("-fgpu-allow-device-init");
CC1Args.push_back("-fcuda-allow-variadic-functions");
// 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.append({"-fvisibility", "hidden"});
CC1Args.push_back("-fapply-global-visibility-to-externs");
}
if (DriverArgs.hasArg(options::OPT_nogpulib))
return;
ArgStringList LibraryPaths;
// Find in --hip-device-lib-path and HIP_LIBRARY_PATH.
for (auto Path :
DriverArgs.getAllArgValues(options::OPT_hip_device_lib_path_EQ))
LibraryPaths.push_back(DriverArgs.MakeArgString(Path));
addDirectoryList(DriverArgs, LibraryPaths, "", "HIP_DEVICE_LIB_PATH");
// Maintain compatability with --hip-device-lib.
auto BCLibs = DriverArgs.getAllArgValues(options::OPT_hip_device_lib_EQ);
if (!BCLibs.empty()) {
for (auto Lib : BCLibs)
addBCLib(getDriver(), DriverArgs, CC1Args, LibraryPaths, Lib);
} else {
if (!RocmInstallation.isValid()) {
getDriver().Diag(diag::err_drv_no_rocm_installation);
return;
}
std::string LibDeviceFile = RocmInstallation.getLibDeviceFile(CanonArch);
if (LibDeviceFile.empty()) {
getDriver().Diag(diag::err_drv_no_rocm_device_lib) << GpuArch;
return;
}
// If --hip-device-lib is not set, add the default bitcode libraries.
// TODO: There are way too many flags that change this. Do we need to check
// them all?
bool DAZ = DriverArgs.hasFlag(options::OPT_fcuda_flush_denormals_to_zero,
options::OPT_fno_cuda_flush_denormals_to_zero,
getDefaultDenormsAreZeroForTarget(Kind));
// TODO: Check standard C++ flags?
bool FiniteOnly = false;
bool UnsafeMathOpt = false;
bool FastRelaxedMath = false;
bool CorrectSqrt = true;
bool Wave64 = isWave64(DriverArgs, Kind);
// Add the HIP specific bitcode library.
CC1Args.push_back("-mlink-builtin-bitcode");
CC1Args.push_back(DriverArgs.MakeArgString(RocmInstallation.getHIPPath()));
// Add the generic set of libraries.
RocmInstallation.addCommonBitcodeLibCC1Args(
DriverArgs, CC1Args, LibDeviceFile, Wave64, DAZ, FiniteOnly,
UnsafeMathOpt, FastRelaxedMath, CorrectSqrt);
}
}
llvm::opt::DerivedArgList *
HIPToolChain::TranslateArgs(const llvm::opt::DerivedArgList &Args,
StringRef BoundArch,
Action::OffloadKind DeviceOffloadKind) const {
DerivedArgList *DAL =
HostTC.TranslateArgs(Args, BoundArch, DeviceOffloadKind);
if (!DAL)
DAL = new DerivedArgList(Args.getBaseArgs());
const OptTable &Opts = getDriver().getOpts();
for (Arg *A : Args) {
DAL->append(A);
}
if (!BoundArch.empty()) {
DAL->eraseArg(options::OPT_march_EQ);
DAL->AddJoinedArg(nullptr, Opts.getOption(options::OPT_march_EQ), BoundArch);
}
return DAL;
}
Tool *HIPToolChain::buildLinker() const {
assert(getTriple().getArch() == llvm::Triple::amdgcn);
return new tools::AMDGCN::Linker(*this);
}
void HIPToolChain::addClangWarningOptions(ArgStringList &CC1Args) const {
HostTC.addClangWarningOptions(CC1Args);
}
ToolChain::CXXStdlibType
HIPToolChain::GetCXXStdlibType(const ArgList &Args) const {
return HostTC.GetCXXStdlibType(Args);
}
void HIPToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
ArgStringList &CC1Args) const {
HostTC.AddClangSystemIncludeArgs(DriverArgs, CC1Args);
}
void HIPToolChain::AddClangCXXStdlibIncludeArgs(const ArgList &Args,
ArgStringList &CC1Args) const {
HostTC.AddClangCXXStdlibIncludeArgs(Args, CC1Args);
}
void HIPToolChain::AddIAMCUIncludeArgs(const ArgList &Args,
ArgStringList &CC1Args) const {
HostTC.AddIAMCUIncludeArgs(Args, CC1Args);
}
SanitizerMask HIPToolChain::getSupportedSanitizers() const {
// The HIPToolChain only supports sanitizers in the sense that it allows
// sanitizer arguments on the command line if they are supported by the host
// toolchain. The HIPToolChain will actually ignore any command line
// arguments for any of these "supported" sanitizers. That means that no
// sanitization of device code is actually supported at this time.
//
// This behavior is necessary because the host and device toolchains
// invocations often share the command line, so the device toolchain must
// tolerate flags meant only for the host toolchain.
return HostTC.getSupportedSanitizers();
}
VersionTuple HIPToolChain::computeMSVCVersion(const Driver *D,
const ArgList &Args) const {
return HostTC.computeMSVCVersion(D, Args);
}
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