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ToolChain.cpp
1250 lines (1081 loc) · 42 KB
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ToolChain.cpp
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//===- ToolChain.cpp - Collections of tools for one platform --------------===//
//
// 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/ToolChain.h"
#include "InputInfo.h"
#include "ToolChains/Arch/ARM.h"
#include "ToolChains/Clang.h"
#include "ToolChains/InterfaceStubs.h"
#include "ToolChains/Flang.h"
#include "clang/Basic/ObjCRuntime.h"
#include "clang/Basic/Sanitizers.h"
#include "clang/Config/config.h"
#include "clang/Driver/Action.h"
#include "clang/Driver/Driver.h"
#include "clang/Driver/DriverDiagnostic.h"
#include "clang/Driver/Job.h"
#include "clang/Driver/Options.h"
#include "clang/Driver/SanitizerArgs.h"
#include "clang/Driver/XRayArgs.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Triple.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Config/llvm-config.h"
#include "llvm/MC/MCTargetOptions.h"
#include "llvm/Option/Arg.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Option/OptTable.h"
#include "llvm/Option/Option.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/TargetParser.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/VersionTuple.h"
#include "llvm/Support/VirtualFileSystem.h"
#include <cassert>
#include <cstddef>
#include <cstring>
#include <string>
using namespace clang;
using namespace driver;
using namespace tools;
using namespace llvm;
using namespace llvm::opt;
static llvm::opt::Arg *GetRTTIArgument(const ArgList &Args) {
return Args.getLastArg(options::OPT_mkernel, options::OPT_fapple_kext,
options::OPT_fno_rtti, options::OPT_frtti);
}
static ToolChain::RTTIMode CalculateRTTIMode(const ArgList &Args,
const llvm::Triple &Triple,
const Arg *CachedRTTIArg) {
// Explicit rtti/no-rtti args
if (CachedRTTIArg) {
if (CachedRTTIArg->getOption().matches(options::OPT_frtti))
return ToolChain::RM_Enabled;
else
return ToolChain::RM_Disabled;
}
// -frtti is default, except for the PS4 CPU.
return (Triple.isPS4CPU()) ? ToolChain::RM_Disabled : ToolChain::RM_Enabled;
}
ToolChain::ToolChain(const Driver &D, const llvm::Triple &T,
const ArgList &Args)
: D(D), Triple(T), Args(Args), CachedRTTIArg(GetRTTIArgument(Args)),
CachedRTTIMode(CalculateRTTIMode(Args, Triple, CachedRTTIArg)) {
if (D.CCCIsCXX()) {
if (auto CXXStdlibPath = getCXXStdlibPath())
getFilePaths().push_back(*CXXStdlibPath);
}
if (auto RuntimePath = getRuntimePath())
getLibraryPaths().push_back(*RuntimePath);
std::string CandidateLibPath = getArchSpecificLibPath();
if (getVFS().exists(CandidateLibPath))
getFilePaths().push_back(CandidateLibPath);
}
void ToolChain::setTripleEnvironment(llvm::Triple::EnvironmentType Env) {
Triple.setEnvironment(Env);
if (EffectiveTriple != llvm::Triple())
EffectiveTriple.setEnvironment(Env);
}
ToolChain::~ToolChain() = default;
llvm::vfs::FileSystem &ToolChain::getVFS() const {
return getDriver().getVFS();
}
bool ToolChain::useIntegratedAs() const {
return Args.hasFlag(options::OPT_fintegrated_as,
options::OPT_fno_integrated_as,
IsIntegratedAssemblerDefault());
}
bool ToolChain::useRelaxRelocations() const {
return ENABLE_X86_RELAX_RELOCATIONS;
}
bool ToolChain::isNoExecStackDefault() const {
return false;
}
const SanitizerArgs& ToolChain::getSanitizerArgs() const {
if (!SanitizerArguments.get())
SanitizerArguments.reset(new SanitizerArgs(*this, Args));
return *SanitizerArguments.get();
}
const XRayArgs& ToolChain::getXRayArgs() const {
if (!XRayArguments.get())
XRayArguments.reset(new XRayArgs(*this, Args));
return *XRayArguments.get();
}
namespace {
struct DriverSuffix {
const char *Suffix;
const char *ModeFlag;
};
} // namespace
static const DriverSuffix *FindDriverSuffix(StringRef ProgName, size_t &Pos) {
// A list of known driver suffixes. Suffixes are compared against the
// program name in order. If there is a match, the frontend type is updated as
// necessary by applying the ModeFlag.
static const DriverSuffix DriverSuffixes[] = {
{"clang", nullptr},
{"clang++", "--driver-mode=g++"},
{"clang-c++", "--driver-mode=g++"},
{"clang-cc", nullptr},
{"clang-cpp", "--driver-mode=cpp"},
{"clang-g++", "--driver-mode=g++"},
{"clang-gcc", nullptr},
{"clang-cl", "--driver-mode=cl"},
{"cc", nullptr},
{"cpp", "--driver-mode=cpp"},
{"cl", "--driver-mode=cl"},
{"++", "--driver-mode=g++"},
{"flang", "--driver-mode=flang"},
};
for (size_t i = 0; i < llvm::array_lengthof(DriverSuffixes); ++i) {
StringRef Suffix(DriverSuffixes[i].Suffix);
if (ProgName.endswith(Suffix)) {
Pos = ProgName.size() - Suffix.size();
return &DriverSuffixes[i];
}
}
return nullptr;
}
/// Normalize the program name from argv[0] by stripping the file extension if
/// present and lower-casing the string on Windows.
static std::string normalizeProgramName(llvm::StringRef Argv0) {
std::string ProgName = std::string(llvm::sys::path::stem(Argv0));
#ifdef _WIN32
// Transform to lowercase for case insensitive file systems.
std::transform(ProgName.begin(), ProgName.end(), ProgName.begin(), ::tolower);
#endif
return ProgName;
}
static const DriverSuffix *parseDriverSuffix(StringRef ProgName, size_t &Pos) {
// Try to infer frontend type and default target from the program name by
// comparing it against DriverSuffixes in order.
// If there is a match, the function tries to identify a target as prefix.
// E.g. "x86_64-linux-clang" as interpreted as suffix "clang" with target
// prefix "x86_64-linux". If such a target prefix is found, it may be
// added via -target as implicit first argument.
const DriverSuffix *DS = FindDriverSuffix(ProgName, Pos);
if (!DS) {
// Try again after stripping any trailing version number:
// clang++3.5 -> clang++
ProgName = ProgName.rtrim("0123456789.");
DS = FindDriverSuffix(ProgName, Pos);
}
if (!DS) {
// Try again after stripping trailing -component.
// clang++-tot -> clang++
ProgName = ProgName.slice(0, ProgName.rfind('-'));
DS = FindDriverSuffix(ProgName, Pos);
}
return DS;
}
ParsedClangName
ToolChain::getTargetAndModeFromProgramName(StringRef PN) {
std::string ProgName = normalizeProgramName(PN);
size_t SuffixPos;
const DriverSuffix *DS = parseDriverSuffix(ProgName, SuffixPos);
if (!DS)
return {};
size_t SuffixEnd = SuffixPos + strlen(DS->Suffix);
size_t LastComponent = ProgName.rfind('-', SuffixPos);
if (LastComponent == std::string::npos)
return ParsedClangName(ProgName.substr(0, SuffixEnd), DS->ModeFlag);
std::string ModeSuffix = ProgName.substr(LastComponent + 1,
SuffixEnd - LastComponent - 1);
// Infer target from the prefix.
StringRef Prefix(ProgName);
Prefix = Prefix.slice(0, LastComponent);
std::string IgnoredError;
bool IsRegistered =
llvm::TargetRegistry::lookupTarget(std::string(Prefix), IgnoredError);
return ParsedClangName{std::string(Prefix), ModeSuffix, DS->ModeFlag,
IsRegistered};
}
StringRef ToolChain::getDefaultUniversalArchName() const {
// In universal driver terms, the arch name accepted by -arch isn't exactly
// the same as the ones that appear in the triple. Roughly speaking, this is
// an inverse of the darwin::getArchTypeForDarwinArchName() function.
switch (Triple.getArch()) {
case llvm::Triple::aarch64:
return "arm64";
case llvm::Triple::aarch64_32:
return "arm64_32";
case llvm::Triple::ppc:
return "ppc";
case llvm::Triple::ppc64:
return "ppc64";
case llvm::Triple::ppc64le:
return "ppc64le";
default:
return Triple.getArchName();
}
}
std::string ToolChain::getInputFilename(const InputInfo &Input) const {
return Input.getFilename();
}
bool ToolChain::IsUnwindTablesDefault(const ArgList &Args) const {
return false;
}
Tool *ToolChain::getClang() const {
if (!Clang)
Clang.reset(new tools::Clang(*this));
return Clang.get();
}
Tool *ToolChain::getFlang() const {
if (!Flang)
Flang.reset(new tools::Flang(*this));
return Flang.get();
}
Tool *ToolChain::buildAssembler() const {
return new tools::ClangAs(*this);
}
Tool *ToolChain::buildLinker() const {
llvm_unreachable("Linking is not supported by this toolchain");
}
Tool *ToolChain::buildStaticLibTool() const {
llvm_unreachable("Creating static lib is not supported by this toolchain");
}
Tool *ToolChain::getAssemble() const {
if (!Assemble)
Assemble.reset(buildAssembler());
return Assemble.get();
}
Tool *ToolChain::getClangAs() const {
if (!Assemble)
Assemble.reset(new tools::ClangAs(*this));
return Assemble.get();
}
Tool *ToolChain::getLink() const {
if (!Link)
Link.reset(buildLinker());
return Link.get();
}
Tool *ToolChain::getStaticLibTool() const {
if (!StaticLibTool)
StaticLibTool.reset(buildStaticLibTool());
return StaticLibTool.get();
}
Tool *ToolChain::getIfsMerge() const {
if (!IfsMerge)
IfsMerge.reset(new tools::ifstool::Merger(*this));
return IfsMerge.get();
}
Tool *ToolChain::getOffloadBundler() const {
if (!OffloadBundler)
OffloadBundler.reset(new tools::OffloadBundler(*this));
return OffloadBundler.get();
}
Tool *ToolChain::getOffloadWrapper() const {
if (!OffloadWrapper)
OffloadWrapper.reset(new tools::OffloadWrapper(*this));
return OffloadWrapper.get();
}
Tool *ToolChain::getTool(Action::ActionClass AC) const {
switch (AC) {
case Action::AssembleJobClass:
return getAssemble();
case Action::IfsMergeJobClass:
return getIfsMerge();
case Action::LinkJobClass:
return getLink();
case Action::StaticLibJobClass:
return getStaticLibTool();
case Action::InputClass:
case Action::BindArchClass:
case Action::OffloadClass:
case Action::LipoJobClass:
case Action::DsymutilJobClass:
case Action::VerifyDebugInfoJobClass:
llvm_unreachable("Invalid tool kind.");
case Action::CompileJobClass:
case Action::PrecompileJobClass:
case Action::HeaderModulePrecompileJobClass:
case Action::PreprocessJobClass:
case Action::AnalyzeJobClass:
case Action::MigrateJobClass:
case Action::VerifyPCHJobClass:
case Action::BackendJobClass:
return getClang();
case Action::OffloadBundlingJobClass:
case Action::OffloadUnbundlingJobClass:
return getOffloadBundler();
case Action::OffloadWrapperJobClass:
return getOffloadWrapper();
}
llvm_unreachable("Invalid tool kind.");
}
static StringRef getArchNameForCompilerRTLib(const ToolChain &TC,
const ArgList &Args) {
const llvm::Triple &Triple = TC.getTriple();
bool IsWindows = Triple.isOSWindows();
if (TC.getArch() == llvm::Triple::arm || TC.getArch() == llvm::Triple::armeb)
return (arm::getARMFloatABI(TC, Args) == arm::FloatABI::Hard && !IsWindows)
? "armhf"
: "arm";
// For historic reasons, Android library is using i686 instead of i386.
if (TC.getArch() == llvm::Triple::x86 && Triple.isAndroid())
return "i686";
return llvm::Triple::getArchTypeName(TC.getArch());
}
StringRef ToolChain::getOSLibName() const {
switch (Triple.getOS()) {
case llvm::Triple::FreeBSD:
return "freebsd";
case llvm::Triple::NetBSD:
return "netbsd";
case llvm::Triple::OpenBSD:
return "openbsd";
case llvm::Triple::Solaris:
return "sunos";
default:
return getOS();
}
}
std::string ToolChain::getCompilerRTPath() const {
SmallString<128> Path(getDriver().ResourceDir);
if (Triple.isOSUnknown()) {
llvm::sys::path::append(Path, "lib");
} else {
llvm::sys::path::append(Path, "lib", getOSLibName());
}
return std::string(Path.str());
}
std::string ToolChain::getCompilerRTBasename(const ArgList &Args,
StringRef Component, FileType Type,
bool AddArch) const {
const llvm::Triple &TT = getTriple();
bool IsITANMSVCWindows =
TT.isWindowsMSVCEnvironment() || TT.isWindowsItaniumEnvironment();
const char *Prefix =
IsITANMSVCWindows || Type == ToolChain::FT_Object ? "" : "lib";
const char *Suffix;
switch (Type) {
case ToolChain::FT_Object:
Suffix = IsITANMSVCWindows ? ".obj" : ".o";
break;
case ToolChain::FT_Static:
Suffix = IsITANMSVCWindows ? ".lib" : ".a";
break;
case ToolChain::FT_Shared:
Suffix = Triple.isOSWindows()
? (Triple.isWindowsGNUEnvironment() ? ".dll.a" : ".lib")
: ".so";
break;
}
std::string ArchAndEnv;
if (AddArch) {
StringRef Arch = getArchNameForCompilerRTLib(*this, Args);
const char *Env = TT.isAndroid() ? "-android" : "";
ArchAndEnv = ("-" + Arch + Env).str();
}
return (Prefix + Twine("clang_rt.") + Component + ArchAndEnv + Suffix).str();
}
std::string ToolChain::getCompilerRT(const ArgList &Args, StringRef Component,
FileType Type) const {
// Check for runtime files in the new layout without the architecture first.
std::string CRTBasename =
getCompilerRTBasename(Args, Component, Type, /*AddArch=*/false);
for (const auto &LibPath : getLibraryPaths()) {
SmallString<128> P(LibPath);
llvm::sys::path::append(P, CRTBasename);
if (getVFS().exists(P))
return std::string(P.str());
}
// Fall back to the old expected compiler-rt name if the new one does not
// exist.
CRTBasename = getCompilerRTBasename(Args, Component, Type, /*AddArch=*/true);
SmallString<128> Path(getCompilerRTPath());
llvm::sys::path::append(Path, CRTBasename);
return std::string(Path.str());
}
const char *ToolChain::getCompilerRTArgString(const llvm::opt::ArgList &Args,
StringRef Component,
FileType Type) const {
return Args.MakeArgString(getCompilerRT(Args, Component, Type));
}
Optional<std::string> ToolChain::getRuntimePath() const {
SmallString<128> P;
// First try the triple passed to driver as --target=<triple>.
P.assign(D.ResourceDir);
llvm::sys::path::append(P, "lib", D.getTargetTriple());
if (getVFS().exists(P))
return llvm::Optional<std::string>(std::string(P.str()));
// Second try the normalized triple.
P.assign(D.ResourceDir);
llvm::sys::path::append(P, "lib", Triple.str());
if (getVFS().exists(P))
return llvm::Optional<std::string>(std::string(P.str()));
return None;
}
Optional<std::string> ToolChain::getCXXStdlibPath() const {
SmallString<128> P;
// First try the triple passed to driver as --target=<triple>.
P.assign(D.Dir);
llvm::sys::path::append(P, "..", "lib", D.getTargetTriple(), "c++");
if (getVFS().exists(P))
return llvm::Optional<std::string>(std::string(P.str()));
// Second try the normalized triple.
P.assign(D.Dir);
llvm::sys::path::append(P, "..", "lib", Triple.str(), "c++");
if (getVFS().exists(P))
return llvm::Optional<std::string>(std::string(P.str()));
return None;
}
std::string ToolChain::getArchSpecificLibPath() const {
SmallString<128> Path(getDriver().ResourceDir);
llvm::sys::path::append(Path, "lib", getOSLibName(),
llvm::Triple::getArchTypeName(getArch()));
return std::string(Path.str());
}
bool ToolChain::needsProfileRT(const ArgList &Args) {
if (Args.hasArg(options::OPT_noprofilelib))
return false;
return Args.hasArg(options::OPT_fprofile_generate) ||
Args.hasArg(options::OPT_fprofile_generate_EQ) ||
Args.hasArg(options::OPT_fcs_profile_generate) ||
Args.hasArg(options::OPT_fcs_profile_generate_EQ) ||
Args.hasArg(options::OPT_fprofile_instr_generate) ||
Args.hasArg(options::OPT_fprofile_instr_generate_EQ) ||
Args.hasArg(options::OPT_fcreate_profile) ||
Args.hasArg(options::OPT_forder_file_instrumentation);
}
bool ToolChain::needsGCovInstrumentation(const llvm::opt::ArgList &Args) {
return Args.hasArg(options::OPT_coverage) ||
Args.hasFlag(options::OPT_fprofile_arcs, options::OPT_fno_profile_arcs,
false);
}
Tool *ToolChain::SelectTool(const JobAction &JA) const {
if (D.IsFlangMode() && getDriver().ShouldUseFlangCompiler(JA)) return getFlang();
if (getDriver().ShouldUseClangCompiler(JA)) return getClang();
Action::ActionClass AC = JA.getKind();
if (AC == Action::AssembleJobClass && useIntegratedAs())
return getClangAs();
return getTool(AC);
}
std::string ToolChain::GetFilePath(const char *Name) const {
return D.GetFilePath(Name, *this);
}
std::string ToolChain::GetProgramPath(const char *Name) const {
return D.GetProgramPath(Name, *this);
}
std::string ToolChain::GetLinkerPath() const {
// Get -fuse-ld= first to prevent -Wunused-command-line-argument. -fuse-ld= is
// considered as the linker flavor, e.g. "bfd", "gold", or "lld".
const Arg* A = Args.getLastArg(options::OPT_fuse_ld_EQ);
StringRef UseLinker = A ? A->getValue() : CLANG_DEFAULT_LINKER;
// --ld-path= takes precedence over -fuse-ld= and specifies the executable
// name. -B, COMPILER_PATH and PATH and consulted if the value does not
// contain a path component separator.
if (const Arg *A = Args.getLastArg(options::OPT_ld_path_EQ)) {
std::string Path(A->getValue());
if (!Path.empty()) {
if (llvm::sys::path::parent_path(Path).empty())
Path = GetProgramPath(A->getValue());
if (llvm::sys::fs::can_execute(Path))
return std::string(Path);
}
getDriver().Diag(diag::err_drv_invalid_linker_name) << A->getAsString(Args);
return GetProgramPath(getDefaultLinker());
}
// If we're passed -fuse-ld= with no argument, or with the argument ld,
// then use whatever the default system linker is.
if (UseLinker.empty() || UseLinker == "ld") {
const char *DefaultLinker = getDefaultLinker();
if (llvm::sys::path::is_absolute(DefaultLinker))
return std::string(DefaultLinker);
else
return GetProgramPath(DefaultLinker);
}
// Extending -fuse-ld= to an absolute or relative path is unexpected. Checking
// for the linker flavor is brittle. In addition, prepending "ld." or "ld64."
// to a relative path is surprising. This is more complex due to priorities
// among -B, COMPILER_PATH and PATH. --ld-path= should be used instead.
if (UseLinker.find('/') != StringRef::npos)
getDriver().Diag(diag::warn_drv_use_ld_non_word);
if (llvm::sys::path::is_absolute(UseLinker)) {
// If we're passed what looks like an absolute path, don't attempt to
// second-guess that.
if (llvm::sys::fs::can_execute(UseLinker))
return std::string(UseLinker);
} else {
llvm::SmallString<8> LinkerName;
if (Triple.isOSDarwin())
LinkerName.append("ld64.");
else
LinkerName.append("ld.");
LinkerName.append(UseLinker);
std::string LinkerPath(GetProgramPath(LinkerName.c_str()));
if (llvm::sys::fs::can_execute(LinkerPath))
return LinkerPath;
}
if (A)
getDriver().Diag(diag::err_drv_invalid_linker_name) << A->getAsString(Args);
return GetProgramPath(getDefaultLinker());
}
std::string ToolChain::GetStaticLibToolPath() const {
// TODO: Add support for static lib archiving on Windows
return GetProgramPath("llvm-ar");
}
types::ID ToolChain::LookupTypeForExtension(StringRef Ext) const {
types::ID id = types::lookupTypeForExtension(Ext);
// Flang always runs the preprocessor and has no notion of "preprocessed
// fortran". Here, TY_PP_Fortran is coerced to TY_Fortran to avoid treating
// them differently.
if (D.IsFlangMode() && id == types::TY_PP_Fortran)
id = types::TY_Fortran;
return id;
}
bool ToolChain::HasNativeLLVMSupport() const {
return false;
}
bool ToolChain::isCrossCompiling() const {
llvm::Triple HostTriple(LLVM_HOST_TRIPLE);
switch (HostTriple.getArch()) {
// The A32/T32/T16 instruction sets are not separate architectures in this
// context.
case llvm::Triple::arm:
case llvm::Triple::armeb:
case llvm::Triple::thumb:
case llvm::Triple::thumbeb:
return getArch() != llvm::Triple::arm && getArch() != llvm::Triple::thumb &&
getArch() != llvm::Triple::armeb && getArch() != llvm::Triple::thumbeb;
default:
return HostTriple.getArch() != getArch();
}
}
ObjCRuntime ToolChain::getDefaultObjCRuntime(bool isNonFragile) const {
return ObjCRuntime(isNonFragile ? ObjCRuntime::GNUstep : ObjCRuntime::GCC,
VersionTuple());
}
llvm::ExceptionHandling
ToolChain::GetExceptionModel(const llvm::opt::ArgList &Args) const {
return llvm::ExceptionHandling::None;
}
bool ToolChain::isThreadModelSupported(const StringRef Model) const {
if (Model == "single") {
// FIXME: 'single' is only supported on ARM and WebAssembly so far.
return Triple.getArch() == llvm::Triple::arm ||
Triple.getArch() == llvm::Triple::armeb ||
Triple.getArch() == llvm::Triple::thumb ||
Triple.getArch() == llvm::Triple::thumbeb || Triple.isWasm();
} else if (Model == "posix")
return true;
return false;
}
std::string ToolChain::ComputeLLVMTriple(const ArgList &Args,
types::ID InputType) const {
switch (getTriple().getArch()) {
default:
return getTripleString();
case llvm::Triple::x86_64: {
llvm::Triple Triple = getTriple();
if (!Triple.isOSBinFormatMachO())
return getTripleString();
if (Arg *A = Args.getLastArg(options::OPT_march_EQ)) {
// x86_64h goes in the triple. Other -march options just use the
// vanilla triple we already have.
StringRef MArch = A->getValue();
if (MArch == "x86_64h")
Triple.setArchName(MArch);
}
return Triple.getTriple();
}
case llvm::Triple::aarch64: {
llvm::Triple Triple = getTriple();
if (!Triple.isOSBinFormatMachO())
return getTripleString();
// FIXME: older versions of ld64 expect the "arm64" component in the actual
// triple string and query it to determine whether an LTO file can be
// handled. Remove this when we don't care any more.
Triple.setArchName("arm64");
return Triple.getTriple();
}
case llvm::Triple::aarch64_32:
return getTripleString();
case llvm::Triple::arm:
case llvm::Triple::armeb:
case llvm::Triple::thumb:
case llvm::Triple::thumbeb: {
// FIXME: Factor into subclasses.
llvm::Triple Triple = getTriple();
bool IsBigEndian = getTriple().getArch() == llvm::Triple::armeb ||
getTriple().getArch() == llvm::Triple::thumbeb;
// Handle pseudo-target flags '-mlittle-endian'/'-EL' and
// '-mbig-endian'/'-EB'.
if (Arg *A = Args.getLastArg(options::OPT_mlittle_endian,
options::OPT_mbig_endian)) {
IsBigEndian = !A->getOption().matches(options::OPT_mlittle_endian);
}
// Thumb2 is the default for V7 on Darwin.
//
// FIXME: Thumb should just be another -target-feaure, not in the triple.
StringRef MCPU, MArch;
if (const Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
MCPU = A->getValue();
if (const Arg *A = Args.getLastArg(options::OPT_march_EQ))
MArch = A->getValue();
std::string CPU =
Triple.isOSBinFormatMachO()
? tools::arm::getARMCPUForMArch(MArch, Triple).str()
: tools::arm::getARMTargetCPU(MCPU, MArch, Triple);
StringRef Suffix =
tools::arm::getLLVMArchSuffixForARM(CPU, MArch, Triple);
bool IsMProfile = ARM::parseArchProfile(Suffix) == ARM::ProfileKind::M;
bool ThumbDefault = IsMProfile || (ARM::parseArchVersion(Suffix) == 7 &&
getTriple().isOSBinFormatMachO());
// FIXME: this is invalid for WindowsCE
if (getTriple().isOSWindows())
ThumbDefault = true;
std::string ArchName;
if (IsBigEndian)
ArchName = "armeb";
else
ArchName = "arm";
// Check if ARM ISA was explicitly selected (using -mno-thumb or -marm) for
// M-Class CPUs/architecture variants, which is not supported.
bool ARMModeRequested = !Args.hasFlag(options::OPT_mthumb,
options::OPT_mno_thumb, ThumbDefault);
if (IsMProfile && ARMModeRequested) {
if (!MCPU.empty())
getDriver().Diag(diag::err_cpu_unsupported_isa) << CPU << "ARM";
else
getDriver().Diag(diag::err_arch_unsupported_isa)
<< tools::arm::getARMArch(MArch, getTriple()) << "ARM";
}
// Check to see if an explicit choice to use thumb has been made via
// -mthumb. For assembler files we must check for -mthumb in the options
// passed to the assembler via -Wa or -Xassembler.
bool IsThumb = false;
if (InputType != types::TY_PP_Asm)
IsThumb = Args.hasFlag(options::OPT_mthumb, options::OPT_mno_thumb,
ThumbDefault);
else {
// Ideally we would check for these flags in
// CollectArgsForIntegratedAssembler but we can't change the ArchName at
// that point. There is no assembler equivalent of -mno-thumb, -marm, or
// -mno-arm.
for (const auto *A :
Args.filtered(options::OPT_Wa_COMMA, options::OPT_Xassembler)) {
for (StringRef Value : A->getValues()) {
if (Value == "-mthumb")
IsThumb = true;
}
}
}
// Assembly files should start in ARM mode, unless arch is M-profile, or
// -mthumb has been passed explicitly to the assembler. Windows is always
// thumb.
if (IsThumb || IsMProfile || getTriple().isOSWindows()) {
if (IsBigEndian)
ArchName = "thumbeb";
else
ArchName = "thumb";
}
Triple.setArchName(ArchName + Suffix.str());
return Triple.getTriple();
}
}
}
std::string ToolChain::ComputeEffectiveClangTriple(const ArgList &Args,
types::ID InputType) const {
return ComputeLLVMTriple(Args, InputType);
}
std::string ToolChain::computeSysRoot() const {
return D.SysRoot;
}
void ToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
ArgStringList &CC1Args) const {
// Each toolchain should provide the appropriate include flags.
}
void ToolChain::addClangTargetOptions(
const ArgList &DriverArgs, ArgStringList &CC1Args,
Action::OffloadKind DeviceOffloadKind) const {}
void ToolChain::addClangWarningOptions(ArgStringList &CC1Args) const {}
void ToolChain::addProfileRTLibs(const llvm::opt::ArgList &Args,
llvm::opt::ArgStringList &CmdArgs) const {
if (!needsProfileRT(Args) && !needsGCovInstrumentation(Args))
return;
CmdArgs.push_back(getCompilerRTArgString(Args, "profile"));
}
ToolChain::RuntimeLibType ToolChain::GetRuntimeLibType(
const ArgList &Args) const {
const Arg* A = Args.getLastArg(options::OPT_rtlib_EQ);
StringRef LibName = A ? A->getValue() : CLANG_DEFAULT_RTLIB;
// Only use "platform" in tests to override CLANG_DEFAULT_RTLIB!
if (LibName == "compiler-rt")
return ToolChain::RLT_CompilerRT;
else if (LibName == "libgcc")
return ToolChain::RLT_Libgcc;
else if (LibName == "platform")
return GetDefaultRuntimeLibType();
if (A)
getDriver().Diag(diag::err_drv_invalid_rtlib_name) << A->getAsString(Args);
return GetDefaultRuntimeLibType();
}
ToolChain::UnwindLibType ToolChain::GetUnwindLibType(
const ArgList &Args) const {
const Arg *A = Args.getLastArg(options::OPT_unwindlib_EQ);
StringRef LibName = A ? A->getValue() : CLANG_DEFAULT_UNWINDLIB;
if (LibName == "none")
return ToolChain::UNW_None;
else if (LibName == "platform" || LibName == "") {
ToolChain::RuntimeLibType RtLibType = GetRuntimeLibType(Args);
if (RtLibType == ToolChain::RLT_CompilerRT)
return ToolChain::UNW_None;
else if (RtLibType == ToolChain::RLT_Libgcc)
return ToolChain::UNW_Libgcc;
} else if (LibName == "libunwind") {
if (GetRuntimeLibType(Args) == RLT_Libgcc)
getDriver().Diag(diag::err_drv_incompatible_unwindlib);
return ToolChain::UNW_CompilerRT;
} else if (LibName == "libgcc")
return ToolChain::UNW_Libgcc;
if (A)
getDriver().Diag(diag::err_drv_invalid_unwindlib_name)
<< A->getAsString(Args);
return GetDefaultUnwindLibType();
}
ToolChain::CXXStdlibType ToolChain::GetCXXStdlibType(const ArgList &Args) const{
const Arg *A = Args.getLastArg(options::OPT_stdlib_EQ);
StringRef LibName = A ? A->getValue() : CLANG_DEFAULT_CXX_STDLIB;
// Only use "platform" in tests to override CLANG_DEFAULT_CXX_STDLIB!
if (LibName == "libc++")
return ToolChain::CST_Libcxx;
else if (LibName == "libstdc++")
return ToolChain::CST_Libstdcxx;
else if (LibName == "platform")
return GetDefaultCXXStdlibType();
if (A)
getDriver().Diag(diag::err_drv_invalid_stdlib_name) << A->getAsString(Args);
return GetDefaultCXXStdlibType();
}
/// Utility function to add a system include directory to CC1 arguments.
/*static*/ void ToolChain::addSystemInclude(const ArgList &DriverArgs,
ArgStringList &CC1Args,
const Twine &Path) {
CC1Args.push_back("-internal-isystem");
CC1Args.push_back(DriverArgs.MakeArgString(Path));
}
/// Utility function to add a system include directory with extern "C"
/// semantics to CC1 arguments.
///
/// Note that this should be used rarely, and only for directories that
/// historically and for legacy reasons are treated as having implicit extern
/// "C" semantics. These semantics are *ignored* by and large today, but its
/// important to preserve the preprocessor changes resulting from the
/// classification.
/*static*/ void ToolChain::addExternCSystemInclude(const ArgList &DriverArgs,
ArgStringList &CC1Args,
const Twine &Path) {
CC1Args.push_back("-internal-externc-isystem");
CC1Args.push_back(DriverArgs.MakeArgString(Path));
}
void ToolChain::addExternCSystemIncludeIfExists(const ArgList &DriverArgs,
ArgStringList &CC1Args,
const Twine &Path) {
if (llvm::sys::fs::exists(Path))
addExternCSystemInclude(DriverArgs, CC1Args, Path);
}
/// Utility function to add a list of system include directories to CC1.
/*static*/ void ToolChain::addSystemIncludes(const ArgList &DriverArgs,
ArgStringList &CC1Args,
ArrayRef<StringRef> Paths) {
for (const auto &Path : Paths) {
CC1Args.push_back("-internal-isystem");
CC1Args.push_back(DriverArgs.MakeArgString(Path));
}
}
void ToolChain::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
ArgStringList &CC1Args) const {
// Header search paths should be handled by each of the subclasses.
// Historically, they have not been, and instead have been handled inside of
// the CC1-layer frontend. As the logic is hoisted out, this generic function
// will slowly stop being called.
//
// While it is being called, replicate a bit of a hack to propagate the
// '-stdlib=' flag down to CC1 so that it can in turn customize the C++
// header search paths with it. Once all systems are overriding this
// function, the CC1 flag and this line can be removed.
DriverArgs.AddAllArgs(CC1Args, options::OPT_stdlib_EQ);
}
void ToolChain::AddClangCXXStdlibIsystemArgs(
const llvm::opt::ArgList &DriverArgs,
llvm::opt::ArgStringList &CC1Args) const {
DriverArgs.ClaimAllArgs(options::OPT_stdlibxx_isystem);
if (!DriverArgs.hasArg(options::OPT_nostdincxx))
for (const auto &P :
DriverArgs.getAllArgValues(options::OPT_stdlibxx_isystem))
addSystemInclude(DriverArgs, CC1Args, P);
}
bool ToolChain::ShouldLinkCXXStdlib(const llvm::opt::ArgList &Args) const {
return getDriver().CCCIsCXX() &&
!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs,
options::OPT_nostdlibxx);
}
void ToolChain::AddCXXStdlibLibArgs(const ArgList &Args,
ArgStringList &CmdArgs) const {
assert(!Args.hasArg(options::OPT_nostdlibxx) &&
"should not have called this");
CXXStdlibType Type = GetCXXStdlibType(Args);
switch (Type) {
case ToolChain::CST_Libcxx:
CmdArgs.push_back("-lc++");
break;
case ToolChain::CST_Libstdcxx:
CmdArgs.push_back("-lstdc++");
break;
}
}
void ToolChain::AddFilePathLibArgs(const ArgList &Args,
ArgStringList &CmdArgs) const {
for (const auto &LibPath : getFilePaths())
if(LibPath.length() > 0)
CmdArgs.push_back(Args.MakeArgString(StringRef("-L") + LibPath));
}
void ToolChain::AddCCKextLibArgs(const ArgList &Args,
ArgStringList &CmdArgs) const {
CmdArgs.push_back("-lcc_kext");
}
bool ToolChain::isFastMathRuntimeAvailable(const ArgList &Args,
std::string &Path) const {
// Do not check for -fno-fast-math or -fno-unsafe-math when -Ofast passed
// (to keep the linker options consistent with gcc and clang itself).
if (!isOptimizationLevelFast(Args)) {
// Check if -ffast-math or -funsafe-math.
Arg *A =
Args.getLastArg(options::OPT_ffast_math, options::OPT_fno_fast_math,
options::OPT_funsafe_math_optimizations,
options::OPT_fno_unsafe_math_optimizations);
if (!A || A->getOption().getID() == options::OPT_fno_fast_math ||
A->getOption().getID() == options::OPT_fno_unsafe_math_optimizations)
return false;
}
// If crtfastmath.o exists add it to the arguments.
Path = GetFilePath("crtfastmath.o");