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//===- AMDGPUOpenMP.cpp - AMDGPUOpenMP ToolChain Implementation -*- 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 "AMDGPUOpenMP.h"
#include "AMDGPU.h"
#include "CommonArgs.h"
#include "ToolChains/ROCm.h"
#include "clang/Basic/DiagnosticDriver.h"
#include "clang/Driver/Compilation.h"
#include "clang/Driver/Driver.h"
#include "clang/Driver/DriverDiagnostic.h"
#include "clang/Driver/InputInfo.h"
#include "clang/Driver/Options.h"
#include "clang/Driver/Tool.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/FormatAdapters.h"
#include "llvm/Support/FormatVariadic.h"
#include "llvm/Support/Path.h"
using namespace clang::driver;
using namespace clang::driver::toolchains;
using namespace clang::driver::tools;
using namespace clang;
using namespace llvm::opt;
AMDGPUOpenMPToolChain::AMDGPUOpenMPToolChain(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 AMDGPUOpenMPToolChain::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.");
assert(DeviceOffloadingKind == Action::OFK_OpenMP &&
"Only OpenMP offloading kinds are supported.");
CC1Args.push_back("-target-cpu");
CC1Args.push_back(DriverArgs.MakeArgStringRef(GPUArch));
CC1Args.push_back("-fcuda-is-device");
if (DriverArgs.hasArg(options::OPT_nogpulib))
return;
for (auto BCFile : getDeviceLibs(DriverArgs)) {
CC1Args.push_back(BCFile.ShouldInternalize ? "-mlink-builtin-bitcode"
: "-mlink-bitcode-file");
CC1Args.push_back(DriverArgs.MakeArgString(BCFile.Path));
}
// Link the bitcode library late if we're using device LTO.
if (getDriver().isUsingLTO(/* IsOffload */ true))
return;
}
llvm::opt::DerivedArgList *AMDGPUOpenMPToolChain::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();
if (DeviceOffloadKind == Action::OFK_OpenMP) {
for (Arg *A : Args)
if (!llvm::is_contained(*DAL, A))
DAL->append(A);
if (!DAL->hasArg(options::OPT_march_EQ)) {
StringRef Arch = BoundArch;
if (Arch.empty()) {
auto ArchsOrErr = getSystemGPUArchs(Args);
if (!ArchsOrErr) {
std::string ErrMsg =
llvm::formatv("{0}", llvm::fmt_consume(ArchsOrErr.takeError()));
getDriver().Diag(diag::err_drv_undetermined_gpu_arch)
<< llvm::Triple::getArchTypeName(getArch()) << ErrMsg << "-march";
Arch = CudaArchToString(CudaArch::HIPDefault);
} else {
Arch = Args.MakeArgString(ArchsOrErr->front());
}
}
DAL->AddJoinedArg(nullptr, Opts.getOption(options::OPT_march_EQ), Arch);
}
return DAL;
}
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;
}
void AMDGPUOpenMPToolChain::addClangWarningOptions(
ArgStringList &CC1Args) const {
HostTC.addClangWarningOptions(CC1Args);
}
ToolChain::CXXStdlibType
AMDGPUOpenMPToolChain::GetCXXStdlibType(const ArgList &Args) const {
return HostTC.GetCXXStdlibType(Args);
}
void AMDGPUOpenMPToolChain::AddClangSystemIncludeArgs(
const ArgList &DriverArgs, ArgStringList &CC1Args) const {
HostTC.AddClangSystemIncludeArgs(DriverArgs, CC1Args);
}
void AMDGPUOpenMPToolChain::AddIAMCUIncludeArgs(const ArgList &Args,
ArgStringList &CC1Args) const {
HostTC.AddIAMCUIncludeArgs(Args, CC1Args);
}
SanitizerMask AMDGPUOpenMPToolChain::getSupportedSanitizers() const {
// The AMDGPUOpenMPToolChain only supports sanitizers in the sense that it
// allows sanitizer arguments on the command line if they are supported by the
// host toolchain. The AMDGPUOpenMPToolChain 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
AMDGPUOpenMPToolChain::computeMSVCVersion(const Driver *D,
const ArgList &Args) const {
return HostTC.computeMSVCVersion(D, Args);
}
llvm::SmallVector<ToolChain::BitCodeLibraryInfo, 12>
AMDGPUOpenMPToolChain::getDeviceLibs(const llvm::opt::ArgList &Args) const {
if (Args.hasArg(options::OPT_nogpulib))
return {};
if (!RocmInstallation.hasDeviceLibrary()) {
getDriver().Diag(diag::err_drv_no_rocm_device_lib) << 0;
return {};
}
StringRef GpuArch = getProcessorFromTargetID(
getTriple(), Args.getLastArgValue(options::OPT_march_EQ));
SmallVector<BitCodeLibraryInfo, 12> BCLibs;
for (auto BCLib : getCommonDeviceLibNames(Args, GpuArch.str(),
/*IsOpenMP=*/true))
BCLibs.emplace_back(BCLib);
return BCLibs;
}
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