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Driver.cpp
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//===--- Driver.cpp - Clang GCC Compatible Driver -------------------------===//
//
// 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 "clang/Driver/Driver.h"
#include "ToolChains/AIX.h"
#include "ToolChains/AMDGPU.h"
#include "ToolChains/AMDGPUOpenMP.h"
#include "ToolChains/AVR.h"
#include "ToolChains/Arch/RISCV.h"
#include "ToolChains/BareMetal.h"
#include "ToolChains/CSKYToolChain.h"
#include "ToolChains/Clang.h"
#include "ToolChains/CrossWindows.h"
#include "ToolChains/Cuda.h"
#include "ToolChains/Darwin.h"
#include "ToolChains/DragonFly.h"
#include "ToolChains/FreeBSD.h"
#include "ToolChains/Fuchsia.h"
#include "ToolChains/Gnu.h"
#include "ToolChains/HIPAMD.h"
#include "ToolChains/HIPSPV.h"
#include "ToolChains/HLSL.h"
#include "ToolChains/Haiku.h"
#include "ToolChains/Hexagon.h"
#include "ToolChains/Hurd.h"
#include "ToolChains/Lanai.h"
#include "ToolChains/Linux.h"
#include "ToolChains/MSP430.h"
#include "ToolChains/MSVC.h"
#include "ToolChains/MinGW.h"
#include "ToolChains/MipsLinux.h"
#include "ToolChains/NaCl.h"
#include "ToolChains/NetBSD.h"
#include "ToolChains/OHOS.h"
#include "ToolChains/OpenBSD.h"
#include "ToolChains/PPCFreeBSD.h"
#include "ToolChains/PPCLinux.h"
#include "ToolChains/PS4CPU.h"
#include "ToolChains/RISCVToolchain.h"
#include "ToolChains/SPIRV.h"
#include "ToolChains/SYCL.h"
#include "ToolChains/SPIRVOpenMP.h"
#include "ToolChains/SYCL.h"
#include "ToolChains/Solaris.h"
#include "ToolChains/TCE.h"
#include "ToolChains/UEFI.h"
#include "ToolChains/VEToolchain.h"
#include "ToolChains/WebAssembly.h"
#include "ToolChains/XCore.h"
#include "ToolChains/ZOS.h"
#include "clang/Basic/DiagnosticDriver.h"
#include "clang/Basic/TargetID.h"
#include "clang/Basic/Version.h"
#include "clang/Config/config.h"
#include "clang/Driver/Action.h"
#include "clang/Driver/Compilation.h"
#include "clang/Driver/InputInfo.h"
#include "clang/Driver/Job.h"
#include "clang/Driver/Options.h"
#include "clang/Driver/Phases.h"
#include "clang/Driver/SanitizerArgs.h"
#include "clang/Driver/Tool.h"
#include "clang/Driver/ToolChain.h"
#include "clang/Driver/Types.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/MapVector.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/StringSet.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/BinaryFormat/Magic.h"
#include "llvm/Config/llvm-config.h"
#include "llvm/MC/TargetRegistry.h"
#include "llvm/Option/Arg.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Option/OptSpecifier.h"
#include "llvm/Option/OptTable.h"
#include "llvm/Option/Option.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/ExitCodes.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/FileUtilities.h"
#include "llvm/Support/FormatVariadic.h"
#include "llvm/Support/LineIterator.h"
#include "llvm/Support/MD5.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/Process.h"
#include "llvm/Support/Program.h"
#include "llvm/Support/Regex.h"
#include "llvm/Support/StringSaver.h"
#include "llvm/Support/VirtualFileSystem.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/TargetParser/Host.h"
#include "llvm/TargetParser/RISCVISAInfo.h"
#include <cstdlib> // ::getenv
#include <map>
#include <memory>
#include <optional>
#include <set>
#include <utility>
#if LLVM_ON_UNIX
#include <unistd.h> // getpid
#endif
using namespace clang::driver;
using namespace clang;
using namespace llvm::opt;
static std::optional<llvm::Triple> getOffloadTargetTriple(const Driver &D,
const ArgList &Args) {
auto OffloadTargets = Args.getAllArgValues(options::OPT_offload_EQ);
// Offload compilation flow does not support multiple targets for now. We
// need the HIPActionBuilder (and possibly the CudaActionBuilder{,Base}too)
// to support multiple tool chains first.
switch (OffloadTargets.size()) {
default:
D.Diag(diag::err_drv_only_one_offload_target_supported);
return std::nullopt;
case 0:
D.Diag(diag::err_drv_invalid_or_unsupported_offload_target) << "";
return std::nullopt;
case 1:
break;
}
return llvm::Triple(OffloadTargets[0]);
}
static std::optional<llvm::Triple>
getNVIDIAOffloadTargetTriple(const Driver &D, const ArgList &Args,
const llvm::Triple &HostTriple) {
if (!Args.hasArg(options::OPT_offload_EQ)) {
return llvm::Triple(HostTriple.isArch64Bit() ? "nvptx64-nvidia-cuda"
: "nvptx-nvidia-cuda");
}
auto TT = getOffloadTargetTriple(D, Args);
if (TT && (TT->getArch() == llvm::Triple::spirv32 ||
TT->getArch() == llvm::Triple::spirv64)) {
if (Args.hasArg(options::OPT_emit_llvm))
return TT;
D.Diag(diag::err_drv_cuda_offload_only_emit_bc);
return std::nullopt;
}
D.Diag(diag::err_drv_invalid_or_unsupported_offload_target) << TT->str();
return std::nullopt;
}
static std::optional<llvm::Triple>
getHIPOffloadTargetTriple(const Driver &D, const ArgList &Args) {
if (!Args.hasArg(options::OPT_offload_EQ)) {
auto OffloadArchs = Args.getAllArgValues(options::OPT_offload_arch_EQ);
if (llvm::is_contained(OffloadArchs, "amdgcnspirv") &&
OffloadArchs.size() == 1)
return llvm::Triple("spirv64-amd-amdhsa");
return llvm::Triple("amdgcn-amd-amdhsa"); // Default HIP triple.
}
auto TT = getOffloadTargetTriple(D, Args);
if (!TT)
return std::nullopt;
if (TT->isAMDGCN() && TT->getVendor() == llvm::Triple::AMD &&
TT->getOS() == llvm::Triple::AMDHSA)
return TT;
if (TT->getArch() == llvm::Triple::spirv64)
return TT;
D.Diag(diag::err_drv_invalid_or_unsupported_offload_target) << TT->str();
return std::nullopt;
}
// static
std::string Driver::GetResourcesPath(StringRef BinaryPath) {
// Since the resource directory is embedded in the module hash, it's important
// that all places that need it call this function, so that they get the
// exact same string ("a/../b/" and "b/" get different hashes, for example).
// Dir is bin/ or lib/, depending on where BinaryPath is.
StringRef Dir = llvm::sys::path::parent_path(BinaryPath);
SmallString<128> P(Dir);
StringRef ConfiguredResourceDir(CLANG_RESOURCE_DIR);
if (!ConfiguredResourceDir.empty()) {
llvm::sys::path::append(P, ConfiguredResourceDir);
} else {
// On Windows, libclang.dll is in bin/.
// On non-Windows, libclang.so/.dylib is in lib/.
// With a static-library build of libclang, LibClangPath will contain the
// path of the embedding binary, which for LLVM binaries will be in bin/.
// ../lib gets us to lib/ in both cases.
P = llvm::sys::path::parent_path(Dir);
// This search path is also created in the COFF driver of lld, so any
// changes here also needs to happen in lld/COFF/Driver.cpp
llvm::sys::path::append(P, CLANG_INSTALL_LIBDIR_BASENAME, "clang",
CLANG_VERSION_MAJOR_STRING);
}
return std::string(P);
}
CUIDOptions::CUIDOptions(llvm::opt::DerivedArgList &Args, const Driver &D)
: UseCUID(Kind::Hash) {
if (Arg *A = Args.getLastArg(options::OPT_fuse_cuid_EQ)) {
StringRef UseCUIDStr = A->getValue();
UseCUID = llvm::StringSwitch<Kind>(UseCUIDStr)
.Case("hash", Kind::Hash)
.Case("random", Kind::Random)
.Case("none", Kind::None)
.Default(Kind::Invalid);
if (UseCUID == Kind::Invalid)
D.Diag(clang::diag::err_drv_invalid_value)
<< A->getAsString(Args) << UseCUIDStr;
}
FixedCUID = Args.getLastArgValue(options::OPT_cuid_EQ);
if (!FixedCUID.empty())
UseCUID = Kind::Fixed;
}
std::string CUIDOptions::getCUID(StringRef InputFile,
llvm::opt::DerivedArgList &Args) const {
std::string CUID = FixedCUID.str();
if (CUID.empty()) {
if (UseCUID == Kind::Random)
CUID = llvm::utohexstr(llvm::sys::Process::GetRandomNumber(),
/*LowerCase=*/true);
else if (UseCUID == Kind::Hash) {
llvm::MD5 Hasher;
llvm::MD5::MD5Result Hash;
Hasher.update(InputFile);
for (auto *A : Args) {
if (A->getOption().matches(options::OPT_INPUT))
continue;
Hasher.update(A->getAsString(Args));
}
Hasher.final(Hash);
CUID = llvm::utohexstr(Hash.low(), /*LowerCase=*/true);
}
}
return CUID;
}
Driver::Driver(StringRef ClangExecutable, StringRef TargetTriple,
DiagnosticsEngine &Diags, std::string Title,
IntrusiveRefCntPtr<llvm::vfs::FileSystem> VFS)
: Diags(Diags), VFS(std::move(VFS)), DumpDeviceCode(false), Mode(GCCMode),
SaveTemps(SaveTempsNone), BitcodeEmbed(EmbedNone),
Offload(OffloadHostDevice), CXX20HeaderType(HeaderMode_None),
ModulesModeCXX20(false), LTOMode(LTOK_None), OffloadLTOMode(LTOK_None),
ClangExecutable(ClangExecutable), SysRoot(DEFAULT_SYSROOT),
DriverTitle(Title), CCCPrintBindings(false), CCPrintOptions(false),
CCLogDiagnostics(false), CCGenDiagnostics(false),
CCPrintProcessStats(false), CCPrintInternalStats(false),
TargetTriple(TargetTriple), Saver(Alloc), PrependArg(nullptr),
CheckInputsExist(true), ProbePrecompiled(true),
SuppressMissingInputWarning(false) {
// Provide a sane fallback if no VFS is specified.
if (!this->VFS)
this->VFS = llvm::vfs::getRealFileSystem();
Name = std::string(llvm::sys::path::filename(ClangExecutable));
Dir = std::string(llvm::sys::path::parent_path(ClangExecutable));
if ((!SysRoot.empty()) && llvm::sys::path::is_relative(SysRoot)) {
// Prepend InstalledDir if SysRoot is relative
SmallString<128> P(Dir);
llvm::sys::path::append(P, SysRoot);
SysRoot = std::string(P);
}
#if defined(CLANG_CONFIG_FILE_SYSTEM_DIR)
if (llvm::sys::path::is_absolute(CLANG_CONFIG_FILE_SYSTEM_DIR)) {
SystemConfigDir = CLANG_CONFIG_FILE_SYSTEM_DIR;
} else {
SmallString<128> configFileDir(Dir);
llvm::sys::path::append(configFileDir, CLANG_CONFIG_FILE_SYSTEM_DIR);
llvm::sys::path::remove_dots(configFileDir, true);
SystemConfigDir = static_cast<std::string>(configFileDir);
}
#endif
#if defined(CLANG_CONFIG_FILE_USER_DIR)
{
SmallString<128> P;
llvm::sys::fs::expand_tilde(CLANG_CONFIG_FILE_USER_DIR, P);
UserConfigDir = static_cast<std::string>(P);
}
#endif
// Compute the path to the resource directory.
ResourceDir = GetResourcesPath(ClangExecutable);
}
void Driver::setDriverMode(StringRef Value) {
static StringRef OptName =
getOpts().getOption(options::OPT_driver_mode).getPrefixedName();
if (auto M = llvm::StringSwitch<std::optional<DriverMode>>(Value)
.Case("gcc", GCCMode)
.Case("g++", GXXMode)
.Case("cpp", CPPMode)
.Case("cl", CLMode)
.Case("flang", FlangMode)
.Case("dxc", DXCMode)
.Default(std::nullopt))
Mode = *M;
else
Diag(diag::err_drv_unsupported_option_argument) << OptName << Value;
}
InputArgList Driver::ParseArgStrings(ArrayRef<const char *> ArgStrings,
bool UseDriverMode,
bool &ContainsError) const {
llvm::PrettyStackTraceString CrashInfo("Command line argument parsing");
ContainsError = false;
llvm::opt::Visibility VisibilityMask = getOptionVisibilityMask(UseDriverMode);
unsigned MissingArgIndex, MissingArgCount;
InputArgList Args = getOpts().ParseArgs(ArgStrings, MissingArgIndex,
MissingArgCount, VisibilityMask);
// Check for missing argument error.
if (MissingArgCount) {
Diag(diag::err_drv_missing_argument)
<< Args.getArgString(MissingArgIndex) << MissingArgCount;
ContainsError |=
Diags.getDiagnosticLevel(diag::err_drv_missing_argument,
SourceLocation()) > DiagnosticsEngine::Warning;
}
// Check for unsupported options.
for (const Arg *A : Args) {
if (A->getOption().hasFlag(options::Unsupported)) {
Diag(diag::err_drv_unsupported_opt) << A->getAsString(Args);
ContainsError |= Diags.getDiagnosticLevel(diag::err_drv_unsupported_opt,
SourceLocation()) >
DiagnosticsEngine::Warning;
continue;
}
// Emit an unsupported and removed diagnostic for any options that were
// previously supported and subsequently removed. This is considered a
// special case scenario that is currently being used for FPGA related
// options that did not go through the regular deprecation process.
if (A->getOption().hasFlag(options::UnsupportedRemoved)) {
Diag(diag::err_drv_unsupported_opt_removed) << A->getAsString(Args);
ContainsError |= Diags.getDiagnosticLevel(
diag::err_drv_unsupported_opt_removed,
SourceLocation()) > DiagnosticsEngine::Warning;
continue;
}
// Deprecated options emit a diagnostic about deprecation, but are still
// supported until removed. It's possible to have a deprecated option which
// aliases with a non-deprecated option, so always compute the argument
// actually used before checking for deprecation.
const Arg *Used = A;
while (Used->getAlias())
Used = Used->getAlias();
if (Used->getOption().hasFlag(options::Deprecated)) {
// Some deprecated options have a replacement option. In these cases,
// add the replacement option string to the diagnostic.
SmallString<128> AliasOpt;
if (Used != A) {
AliasOpt = A->getSpelling();
if (A->getNumValues())
AliasOpt += A->getValue();
}
Diag(diag::warn_drv_deprecated_option_release)
<< Used->getAsString(Args) << !AliasOpt.empty() << AliasOpt;
ContainsError |= Diags.getDiagnosticLevel(
diag::warn_drv_deprecated_option_release,
SourceLocation()) > DiagnosticsEngine::Warning;
}
// Warn about -mcpu= without an argument.
if (A->getOption().matches(options::OPT_mcpu_EQ) && A->containsValue("")) {
Diag(diag::warn_drv_empty_joined_argument) << A->getAsString(Args);
ContainsError |= Diags.getDiagnosticLevel(
diag::warn_drv_empty_joined_argument,
SourceLocation()) > DiagnosticsEngine::Warning;
}
}
for (const Arg *A : Args.filtered(options::OPT_UNKNOWN)) {
unsigned DiagID;
auto ArgString = A->getAsString(Args);
std::string Nearest;
if (getOpts().findNearest(ArgString, Nearest, VisibilityMask) > 1) {
if (!IsCLMode() &&
getOpts().findExact(ArgString, Nearest,
llvm::opt::Visibility(options::CC1Option))) {
DiagID = diag::err_drv_unknown_argument_with_suggestion;
Diags.Report(DiagID) << ArgString << "-Xclang " + Nearest;
} else {
DiagID = IsCLMode() ? diag::warn_drv_unknown_argument_clang_cl
: diag::err_drv_unknown_argument;
Diags.Report(DiagID) << ArgString;
}
} else {
DiagID = IsCLMode()
? diag::warn_drv_unknown_argument_clang_cl_with_suggestion
: diag::err_drv_unknown_argument_with_suggestion;
Diags.Report(DiagID) << ArgString << Nearest;
}
ContainsError |= Diags.getDiagnosticLevel(DiagID, SourceLocation()) >
DiagnosticsEngine::Warning;
}
for (const Arg *A : Args.filtered(options::OPT_o)) {
if (ArgStrings[A->getIndex()] == A->getSpelling())
continue;
// Warn on joined arguments that are similar to a long argument.
std::string ArgString = ArgStrings[A->getIndex()];
std::string Nearest;
if (getOpts().findExact("-" + ArgString, Nearest, VisibilityMask))
Diags.Report(diag::warn_drv_potentially_misspelled_joined_argument)
<< A->getAsString(Args) << Nearest;
}
return Args;
}
// Determine which compilation mode we are in. We look for options which
// affect the phase, starting with the earliest phases, and record which
// option we used to determine the final phase.
phases::ID Driver::getFinalPhase(const DerivedArgList &DAL,
Arg **FinalPhaseArg) const {
Arg *PhaseArg = nullptr;
phases::ID FinalPhase;
// -{E,EP,P,M,MM} only run the preprocessor.
if (CCCIsCPP() || (PhaseArg = DAL.getLastArg(options::OPT_E)) ||
(PhaseArg = DAL.getLastArg(options::OPT__SLASH_EP)) ||
(PhaseArg = DAL.getLastArg(options::OPT_M, options::OPT_MM)) ||
(PhaseArg = DAL.getLastArg(options::OPT__SLASH_P)) ||
CCGenDiagnostics) {
FinalPhase = phases::Preprocess;
// --precompile only runs up to precompilation.
// Options that cause the output of C++20 compiled module interfaces or
// header units have the same effect.
} else if ((PhaseArg = DAL.getLastArg(options::OPT__precompile)) ||
(PhaseArg = DAL.getLastArg(options::OPT_extract_api)) ||
(PhaseArg = DAL.getLastArg(options::OPT_fmodule_header,
options::OPT_fmodule_header_EQ))) {
FinalPhase = phases::Precompile;
// -{fsyntax-only,-analyze,emit-ast} only run up to the compiler.
} else if ((PhaseArg = DAL.getLastArg(options::OPT_fsyntax_only)) ||
(PhaseArg = DAL.getLastArg(options::OPT_print_supported_cpus)) ||
(PhaseArg =
DAL.getLastArg(options::OPT_print_enabled_extensions)) ||
(PhaseArg = DAL.getLastArg(options::OPT_module_file_info)) ||
(PhaseArg = DAL.getLastArg(options::OPT_verify_pch)) ||
(PhaseArg = DAL.getLastArg(options::OPT_rewrite_objc)) ||
(PhaseArg = DAL.getLastArg(options::OPT_rewrite_legacy_objc)) ||
(PhaseArg = DAL.getLastArg(options::OPT__analyze)) ||
(PhaseArg = DAL.getLastArg(options::OPT_emit_cir)) ||
(PhaseArg = DAL.getLastArg(options::OPT_emit_ast))) {
FinalPhase = phases::Compile;
// -S only runs up to the backend.
} else if ((PhaseArg = DAL.getLastArg(options::OPT_S))) {
FinalPhase = phases::Backend;
// -c compilation only runs up to the assembler.
} else if ((PhaseArg = DAL.getLastArg(options::OPT_c))) {
FinalPhase = phases::Assemble;
} else if ((PhaseArg = DAL.getLastArg(options::OPT_emit_interface_stubs))) {
FinalPhase = phases::IfsMerge;
// Otherwise do everything.
} else
FinalPhase = phases::Link;
if (FinalPhaseArg)
*FinalPhaseArg = PhaseArg;
return FinalPhase;
}
static Arg *MakeInputArg(DerivedArgList &Args, const OptTable &Opts,
StringRef Value, bool Claim = true) {
Arg *A = new Arg(Opts.getOption(options::OPT_INPUT), Value,
Args.getBaseArgs().MakeIndex(Value), Value.data());
Args.AddSynthesizedArg(A);
if (Claim)
A->claim();
return A;
}
DerivedArgList *Driver::TranslateInputArgs(const InputArgList &Args) const {
const llvm::opt::OptTable &Opts = getOpts();
DerivedArgList *DAL = new DerivedArgList(Args);
bool HasNostdlib = Args.hasArg(options::OPT_nostdlib);
bool HasNostdlibxx = Args.hasArg(options::OPT_nostdlibxx);
bool HasNodefaultlib = Args.hasArg(options::OPT_nodefaultlibs);
bool IgnoreUnused = false;
for (Arg *A : Args) {
if (IgnoreUnused)
A->claim();
if (A->getOption().matches(options::OPT_start_no_unused_arguments)) {
IgnoreUnused = true;
continue;
}
if (A->getOption().matches(options::OPT_end_no_unused_arguments)) {
IgnoreUnused = false;
continue;
}
// Unfortunately, we have to parse some forwarding options (-Xassembler,
// -Xlinker, -Xpreprocessor) because we either integrate their functionality
// (assembler and preprocessor), or bypass a previous driver ('collect2').
// Rewrite linker options, to replace --no-demangle with a custom internal
// option.
if ((A->getOption().matches(options::OPT_Wl_COMMA) ||
A->getOption().matches(options::OPT_Xlinker)) &&
A->containsValue("--no-demangle")) {
// Add the rewritten no-demangle argument.
DAL->AddFlagArg(A, Opts.getOption(options::OPT_Z_Xlinker__no_demangle));
// Add the remaining values as Xlinker arguments.
for (StringRef Val : A->getValues())
if (Val != "--no-demangle")
DAL->AddSeparateArg(A, Opts.getOption(options::OPT_Xlinker), Val);
continue;
}
// Rewrite preprocessor options, to replace -Wp,-MD,FOO which is used by
// some build systems. We don't try to be complete here because we don't
// care to encourage this usage model.
if (A->getOption().matches(options::OPT_Wp_COMMA) &&
A->getNumValues() > 0 &&
(A->getValue(0) == StringRef("-MD") ||
A->getValue(0) == StringRef("-MMD"))) {
// Rewrite to -MD/-MMD along with -MF.
if (A->getValue(0) == StringRef("-MD"))
DAL->AddFlagArg(A, Opts.getOption(options::OPT_MD));
else
DAL->AddFlagArg(A, Opts.getOption(options::OPT_MMD));
if (A->getNumValues() == 2)
DAL->AddSeparateArg(A, Opts.getOption(options::OPT_MF), A->getValue(1));
continue;
}
// Rewrite reserved library names.
if (A->getOption().matches(options::OPT_l)) {
StringRef Value = A->getValue();
// Rewrite unless -nostdlib is present.
if (!HasNostdlib && !HasNodefaultlib && !HasNostdlibxx &&
Value == "stdc++") {
DAL->AddFlagArg(A, Opts.getOption(options::OPT_Z_reserved_lib_stdcxx));
continue;
}
// Rewrite unconditionally.
if (Value == "cc_kext") {
DAL->AddFlagArg(A, Opts.getOption(options::OPT_Z_reserved_lib_cckext));
continue;
}
}
// Pick up inputs via the -- option.
if (A->getOption().matches(options::OPT__DASH_DASH)) {
A->claim();
for (StringRef Val : A->getValues())
DAL->append(MakeInputArg(*DAL, Opts, Val, false));
continue;
}
if (A->getOption().matches(options::OPT_offload_lib_Group)) {
if (!A->getNumValues()) {
Diag(clang::diag::warn_drv_unused_argument) << A->getSpelling();
continue;
}
}
DAL->append(A);
}
// DXC mode quits before assembly if an output object file isn't specified.
if (IsDXCMode() && !Args.hasArg(options::OPT_dxc_Fo))
DAL->AddFlagArg(nullptr, Opts.getOption(options::OPT_S));
// Enforce -static if -miamcu is present.
if (Args.hasFlag(options::OPT_miamcu, options::OPT_mno_iamcu, false))
DAL->AddFlagArg(nullptr, Opts.getOption(options::OPT_static));
// Add a default value of -mlinker-version=, if one was given and the user
// didn't specify one.
#if defined(HOST_LINK_VERSION)
if (!Args.hasArg(options::OPT_mlinker_version_EQ) &&
strlen(HOST_LINK_VERSION) > 0) {
DAL->AddJoinedArg(0, Opts.getOption(options::OPT_mlinker_version_EQ),
HOST_LINK_VERSION);
DAL->getLastArg(options::OPT_mlinker_version_EQ)->claim();
}
#endif
return DAL;
}
static void setZosTargetVersion(const Driver &D, llvm::Triple &Target,
StringRef ArgTarget) {
static bool BeSilent = false;
auto IsTooOldToBeSupported = [](int v, int r) -> bool {
return ((v < 2) || ((v == 2) && (r < 4)));
};
/* expect CURRENT, zOSV2R[45], or 0xnnnnnnnn */
if (ArgTarget.equals_insensitive("CURRENT")) {
/* If the user gives CURRENT, then we rely on the LE to set */
/* __TARGET_LIB__. There's nothing more we need to do. */
} else {
unsigned int Version = 0;
unsigned int Release = 0;
unsigned int Modification = 0;
bool IsOk = true;
llvm::Regex ZOsvRegex("[zZ][oO][sS][vV]([0-9])[rR]([0-9])");
llvm::Regex HexRegex(
"0x4" /* product */
"([0-9a-fA-F])" /* version */
"([0-9a-fA-F][0-9a-fA-F])" /* release */
"([0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F])" /* modification */);
SmallVector<StringRef> Matches;
if (ZOsvRegex.match(ArgTarget, &Matches)) {
Matches[1].getAsInteger(10, Version);
Matches[2].getAsInteger(10, Release);
Modification = 0;
if (IsTooOldToBeSupported(Version, Release)) {
if (!BeSilent)
D.Diag(diag::err_zos_target_release_discontinued) << ArgTarget;
IsOk = false;
}
} else if (HexRegex.match(ArgTarget, &Matches)) {
Matches[1].getAsInteger(16, Version);
Matches[2].getAsInteger(16, Release);
Matches[3].getAsInteger(16, Modification);
if (IsTooOldToBeSupported(Version, Release)) {
if (!BeSilent)
D.Diag(diag::err_zos_target_release_discontinued) << ArgTarget;
IsOk = false;
}
} else {
/* something else: need to report an error */
if (!BeSilent)
D.Diag(diag::err_zos_target_unrecognized_release) << ArgTarget;
IsOk = false;
}
if (IsOk) {
llvm::VersionTuple V(Version, Release, Modification);
llvm::VersionTuple TV = Target.getOSVersion();
// The goal is to pick the minimally supported version of
// the OS. Pick the lesser as the target.
if (TV.empty() || V < TV) {
SmallString<16> Str;
Str = llvm::Triple::getOSTypeName(Target.getOS());
Str += V.getAsString();
Target.setOSName(Str);
}
}
}
BeSilent = true;
}
/// Compute target triple from args.
///
/// This routine provides the logic to compute a target triple from various
/// args passed to the driver and the default triple string.
static llvm::Triple computeTargetTriple(const Driver &D,
StringRef TargetTriple,
const ArgList &Args,
StringRef DarwinArchName = "") {
// FIXME: Already done in Compilation *Driver::BuildCompilation
if (const Arg *A = Args.getLastArg(options::OPT_target))
TargetTriple = A->getValue();
llvm::Triple Target(llvm::Triple::normalize(TargetTriple));
// GNU/Hurd's triples should have been -hurd-gnu*, but were historically made
// -gnu* only, and we can not change this, so we have to detect that case as
// being the Hurd OS.
if (TargetTriple.contains("-unknown-gnu") || TargetTriple.contains("-pc-gnu"))
Target.setOSName("hurd");
// Handle Apple-specific options available here.
if (Target.isOSBinFormatMachO()) {
// If an explicit Darwin arch name is given, that trumps all.
if (!DarwinArchName.empty()) {
tools::darwin::setTripleTypeForMachOArchName(Target, DarwinArchName,
Args);
return Target;
}
// Handle the Darwin '-arch' flag.
if (Arg *A = Args.getLastArg(options::OPT_arch)) {
StringRef ArchName = A->getValue();
tools::darwin::setTripleTypeForMachOArchName(Target, ArchName, Args);
}
}
// Handle pseudo-target flags '-mlittle-endian'/'-EL' and
// '-mbig-endian'/'-EB'.
if (Arg *A = Args.getLastArgNoClaim(options::OPT_mlittle_endian,
options::OPT_mbig_endian)) {
llvm::Triple T = A->getOption().matches(options::OPT_mlittle_endian)
? Target.getLittleEndianArchVariant()
: Target.getBigEndianArchVariant();
if (T.getArch() != llvm::Triple::UnknownArch) {
Target = std::move(T);
Args.claimAllArgs(options::OPT_mlittle_endian, options::OPT_mbig_endian);
}
}
// Skip further flag support on OSes which don't support '-m32' or '-m64'.
if (Target.getArch() == llvm::Triple::tce)
return Target;
// On AIX, the env OBJECT_MODE may affect the resulting arch variant.
if (Target.isOSAIX()) {
if (std::optional<std::string> ObjectModeValue =
llvm::sys::Process::GetEnv("OBJECT_MODE")) {
StringRef ObjectMode = *ObjectModeValue;
llvm::Triple::ArchType AT = llvm::Triple::UnknownArch;
if (ObjectMode == "64") {
AT = Target.get64BitArchVariant().getArch();
} else if (ObjectMode == "32") {
AT = Target.get32BitArchVariant().getArch();
} else {
D.Diag(diag::err_drv_invalid_object_mode) << ObjectMode;
}
if (AT != llvm::Triple::UnknownArch && AT != Target.getArch())
Target.setArch(AT);
}
}
// Currently the only architecture supported by *-uefi triples are x86_64.
if (Target.isUEFI() && Target.getArch() != llvm::Triple::x86_64)
D.Diag(diag::err_target_unknown_triple) << Target.str();
// The `-maix[32|64]` flags are only valid for AIX targets.
if (Arg *A = Args.getLastArgNoClaim(options::OPT_maix32, options::OPT_maix64);
A && !Target.isOSAIX())
D.Diag(diag::err_drv_unsupported_opt_for_target)
<< A->getAsString(Args) << Target.str();
// Handle pseudo-target flags '-m64', '-mx32', '-m32' and '-m16'.
Arg *A = Args.getLastArg(options::OPT_m64, options::OPT_mx32,
options::OPT_m32, options::OPT_m16,
options::OPT_maix32, options::OPT_maix64);
if (A) {
llvm::Triple::ArchType AT = llvm::Triple::UnknownArch;
if (A->getOption().matches(options::OPT_m64) ||
A->getOption().matches(options::OPT_maix64)) {
AT = Target.get64BitArchVariant().getArch();
if (Target.getEnvironment() == llvm::Triple::GNUX32 ||
Target.getEnvironment() == llvm::Triple::GNUT64)
Target.setEnvironment(llvm::Triple::GNU);
else if (Target.getEnvironment() == llvm::Triple::MuslX32)
Target.setEnvironment(llvm::Triple::Musl);
} else if (A->getOption().matches(options::OPT_mx32) &&
Target.get64BitArchVariant().getArch() == llvm::Triple::x86_64) {
AT = llvm::Triple::x86_64;
if (Target.getEnvironment() == llvm::Triple::Musl)
Target.setEnvironment(llvm::Triple::MuslX32);
else
Target.setEnvironment(llvm::Triple::GNUX32);
} else if (A->getOption().matches(options::OPT_m32) ||
A->getOption().matches(options::OPT_maix32)) {
AT = Target.get32BitArchVariant().getArch();
if (Target.getEnvironment() == llvm::Triple::GNUX32)
Target.setEnvironment(llvm::Triple::GNU);
else if (Target.getEnvironment() == llvm::Triple::MuslX32)
Target.setEnvironment(llvm::Triple::Musl);
} else if (A->getOption().matches(options::OPT_m16) &&
Target.get32BitArchVariant().getArch() == llvm::Triple::x86) {
AT = llvm::Triple::x86;
Target.setEnvironment(llvm::Triple::CODE16);
}
if (AT != llvm::Triple::UnknownArch && AT != Target.getArch()) {
Target.setArch(AT);
if (Target.isWindowsGNUEnvironment())
toolchains::MinGW::fixTripleArch(D, Target, Args);
}
}
if (Target.isOSzOS()) {
if ((A = Args.getLastArg(options::OPT_mzos_target_EQ))) {
setZosTargetVersion(D, Target, A->getValue());
}
}
// Handle -miamcu flag.
if (Args.hasFlag(options::OPT_miamcu, options::OPT_mno_iamcu, false)) {
if (Target.get32BitArchVariant().getArch() != llvm::Triple::x86)
D.Diag(diag::err_drv_unsupported_opt_for_target) << "-miamcu"
<< Target.str();
if (A && !A->getOption().matches(options::OPT_m32))
D.Diag(diag::err_drv_argument_not_allowed_with)
<< "-miamcu" << A->getBaseArg().getAsString(Args);
Target.setArch(llvm::Triple::x86);
Target.setArchName("i586");
Target.setEnvironment(llvm::Triple::UnknownEnvironment);
Target.setEnvironmentName("");
Target.setOS(llvm::Triple::ELFIAMCU);
Target.setVendor(llvm::Triple::UnknownVendor);
Target.setVendorName("intel");
}
// If target is MIPS adjust the target triple
// accordingly to provided ABI name.
if (Target.isMIPS()) {
if ((A = Args.getLastArg(options::OPT_mabi_EQ))) {
StringRef ABIName = A->getValue();
if (ABIName == "32") {
Target = Target.get32BitArchVariant();
if (Target.getEnvironment() == llvm::Triple::GNUABI64 ||
Target.getEnvironment() == llvm::Triple::GNUABIN32)
Target.setEnvironment(llvm::Triple::GNU);
} else if (ABIName == "n32") {
Target = Target.get64BitArchVariant();
if (Target.getEnvironment() == llvm::Triple::GNU ||
Target.getEnvironment() == llvm::Triple::GNUT64 ||
Target.getEnvironment() == llvm::Triple::GNUABI64)
Target.setEnvironment(llvm::Triple::GNUABIN32);
else if (Target.getEnvironment() == llvm::Triple::Musl ||
Target.getEnvironment() == llvm::Triple::MuslABI64)
Target.setEnvironment(llvm::Triple::MuslABIN32);
} else if (ABIName == "64") {
Target = Target.get64BitArchVariant();
if (Target.getEnvironment() == llvm::Triple::GNU ||
Target.getEnvironment() == llvm::Triple::GNUT64 ||
Target.getEnvironment() == llvm::Triple::GNUABIN32)
Target.setEnvironment(llvm::Triple::GNUABI64);
else if (Target.getEnvironment() == llvm::Triple::Musl ||
Target.getEnvironment() == llvm::Triple::MuslABIN32)
Target.setEnvironment(llvm::Triple::MuslABI64);
}
}
}
// If target is RISC-V adjust the target triple according to
// provided architecture name
if (Target.isRISCV()) {
if (Args.hasArg(options::OPT_march_EQ) ||
Args.hasArg(options::OPT_mcpu_EQ)) {
std::string ArchName = tools::riscv::getRISCVArch(Args, Target);
auto ISAInfo = llvm::RISCVISAInfo::parseArchString(
ArchName, /*EnableExperimentalExtensions=*/true);
if (!llvm::errorToBool(ISAInfo.takeError())) {
unsigned XLen = (*ISAInfo)->getXLen();
if (XLen == 32)
Target.setArch(llvm::Triple::riscv32);
else if (XLen == 64)
Target.setArch(llvm::Triple::riscv64);
}
}
}
return Target;
}
// Parse the LTO options and record the type of LTO compilation
// based on which -f(no-)?lto(=.*)? or -f(no-)?offload-lto(=.*)?
// option occurs last.
static driver::LTOKind parseLTOMode(Driver &D, const llvm::opt::ArgList &Args,
OptSpecifier OptEq, OptSpecifier OptNeg) {
if (!Args.hasFlag(OptEq, OptNeg, false))
return LTOK_None;
const Arg *A = Args.getLastArg(OptEq);
StringRef LTOName = A->getValue();
driver::LTOKind LTOMode = llvm::StringSwitch<LTOKind>(LTOName)
.Case("full", LTOK_Full)
.Case("thin", LTOK_Thin)
.Default(LTOK_Unknown);
if (LTOMode == LTOK_Unknown) {
D.Diag(diag::err_drv_unsupported_option_argument)
<< A->getSpelling() << A->getValue();
return LTOK_None;
}
return LTOMode;
}
// Parse the LTO options.
void Driver::setLTOMode(const llvm::opt::ArgList &Args) {
LTOMode =
parseLTOMode(*this, Args, options::OPT_flto_EQ, options::OPT_fno_lto);
OffloadLTOMode = parseLTOMode(*this, Args, options::OPT_foffload_lto_EQ,
options::OPT_fno_offload_lto);
// Try to enable `-foffload-lto=full` if `-fopenmp-target-jit` is on.
if (Args.hasFlag(options::OPT_fopenmp_target_jit,
options::OPT_fno_openmp_target_jit, false)) {
if (Arg *A = Args.getLastArg(options::OPT_foffload_lto_EQ,
options::OPT_fno_offload_lto))
if (OffloadLTOMode != LTOK_Full)
Diag(diag::err_drv_incompatible_options)
<< A->getSpelling() << "-fopenmp-target-jit";
OffloadLTOMode = LTOK_Full;
}
}
/// Compute the desired OpenMP runtime from the flags provided.
Driver::OpenMPRuntimeKind Driver::getOpenMPRuntime(const ArgList &Args) const {
StringRef RuntimeName(CLANG_DEFAULT_OPENMP_RUNTIME);
const Arg *A = Args.getLastArg(options::OPT_fopenmp_EQ);
if (A)
RuntimeName = A->getValue();
auto RT = llvm::StringSwitch<OpenMPRuntimeKind>(RuntimeName)
.Case("libomp", OMPRT_OMP)
.Case("libgomp", OMPRT_GOMP)
.Case("libiomp5", OMPRT_IOMP5)
.Default(OMPRT_Unknown);
if (RT == OMPRT_Unknown) {
if (A)
Diag(diag::err_drv_unsupported_option_argument)
<< A->getSpelling() << A->getValue();
else
// FIXME: We could use a nicer diagnostic here.
Diag(diag::err_drv_unsupported_opt) << "-fopenmp";
}
return RT;
}
static bool isValidSYCLTriple(llvm::Triple T) {
// 'nvptx64-nvidia-cuda' is the valid SYCL triple for NVidia GPUs.
if (T.getArch() == llvm::Triple::nvptx64 &&
T.getVendor() == llvm::Triple::NVIDIA &&
T.getOS() == llvm::Triple::CUDA && !T.hasEnvironment())
return true;
// 'amdgcn-amd-amdhsa' is the valid SYCL triple for AMD GPUs.
if (T.getArch() == llvm::Triple::amdgcn &&
T.getVendor() == llvm::Triple::AMD && T.getOS() == llvm::Triple::AMDHSA &&
!T.hasEnvironment())
return true;
// 'native_cpu' is valid for Native CPU.
if (isSYCLNativeCPU(T))
return true;
// Check for invalid SYCL device triple values.
// Non-SPIR/SPIRV arch.
if (!T.isSPIROrSPIRV())
return false;
// SPIR/SPIRV arch, but has invalid SubArch for AOT.
StringRef A(T.getArchName());
if (T.getSubArch() == llvm::Triple::NoSubArch &&
((T.getArch() == llvm::Triple::spir && A != "spir") ||
(T.getArch() == llvm::Triple::spir64 && A != "spir64")))
return false;
return true;
}
static const char *getDefaultSYCLArch(Compilation &C) {
// If -fsycl is supplied we will assume SPIR-V
if (C.getDefaultToolChain().getTriple().getArch() == llvm::Triple::x86)
return "spir";
return "spir64";
}
llvm::Triple Driver::getSYCLDeviceTriple(StringRef TargetArch,
const Arg *Arg) const {
SmallVector<StringRef, 5> SYCLAlias = {
"spir", "spir64", "spir64_fpga", "spir64_x86_64",
"spir64_gen", "spirv32", "spirv64", "nvptx64"};
// spir64_fpga is not supported. Retain this check as it impacts the command
// line acceptance of -fsycl-targets=spir64_fpga. We need to continue to
// emit the proper diagnostic informing the user of no support.
llvm::Triple TargetTriple(TargetArch);
if (Arg && !Arg->isClaimed() && TargetTriple.isSPIR() &&
TargetTriple.getSubArch() == llvm::Triple::SPIRSubArch_fpga) {
Diag(diag::err_drv_unsupported_opt_removed)
<< Arg->getSpelling().str() + TargetArch.str();
Arg->claim();
}
if (llvm::is_contained(SYCLAlias, TargetArch)) {
llvm::Triple TT;