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//===--- Driver.cpp - Clang GCC Compatible Driver -------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "clang/Driver/Driver.h"
#include "InputInfo.h"
#include "ToolChains.h"
#include "clang/Basic/Version.h"
#include "clang/Basic/VirtualFileSystem.h"
#include "clang/Config/config.h"
#include "clang/Driver/Action.h"
#include "clang/Driver/Compilation.h"
#include "clang/Driver/DriverDiagnostic.h"
#include "clang/Driver/Job.h"
#include "clang/Driver/Options.h"
#include "clang/Driver/SanitizerArgs.h"
#include "clang/Driver/Tool.h"
#include "clang/Driver/ToolChain.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringSet.h"
#include "llvm/ADT/StringSwitch.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/ErrorHandling.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/Process.h"
#include "llvm/Support/Program.h"
#include "llvm/Support/raw_ostream.h"
#include <map>
#include <memory>
#include <utility>
#if LLVM_ON_UNIX
#include <unistd.h> // getpid
#endif
using namespace clang::driver;
using namespace clang;
using namespace llvm::opt;
Driver::Driver(StringRef ClangExecutable, StringRef DefaultTargetTriple,
DiagnosticsEngine &Diags,
IntrusiveRefCntPtr<vfs::FileSystem> VFS)
: Opts(createDriverOptTable()), Diags(Diags), VFS(std::move(VFS)),
Mode(GCCMode), SaveTemps(SaveTempsNone), BitcodeEmbed(EmbedNone),
LTOMode(LTOK_None), ClangExecutable(ClangExecutable),
SysRoot(DEFAULT_SYSROOT), UseStdLib(true),
DriverTitle("clang LLVM compiler"), CCPrintOptionsFilename(nullptr),
CCPrintHeadersFilename(nullptr), CCLogDiagnosticsFilename(nullptr),
CCCPrintBindings(false), CCPrintHeaders(false), CCLogDiagnostics(false),
CCGenDiagnostics(false), DefaultTargetTriple(DefaultTargetTriple),
CCCGenericGCCName(""), CheckInputsExist(true), CCCUsePCH(true),
GenReproducer(false), SuppressMissingInputWarning(false) {
// Provide a sane fallback if no VFS is specified.
if (!this->VFS)
this->VFS = vfs::getRealFileSystem();
Name = llvm::sys::path::filename(ClangExecutable);
Dir = llvm::sys::path::parent_path(ClangExecutable);
InstalledDir = Dir; // Provide a sensible default installed dir.
// Compute the path to the resource directory.
StringRef ClangResourceDir(CLANG_RESOURCE_DIR);
SmallString<128> P(Dir);
if (ClangResourceDir != "") {
llvm::sys::path::append(P, ClangResourceDir);
} else {
StringRef ClangLibdirSuffix(CLANG_LIBDIR_SUFFIX);
P = llvm::sys::path::parent_path(Dir);
llvm::sys::path::append(P, Twine("lib") + ClangLibdirSuffix, "clang",
CLANG_VERSION_STRING);
}
ResourceDir = P.str();
}
Driver::~Driver() {
delete Opts;
llvm::DeleteContainerSeconds(ToolChains);
}
void Driver::ParseDriverMode(StringRef ProgramName,
ArrayRef<const char *> Args) {
auto Default = ToolChain::getTargetAndModeFromProgramName(ProgramName);
StringRef DefaultMode(Default.second);
setDriverModeFromOption(DefaultMode);
for (const char *ArgPtr : Args) {
// Ingore nullptrs, they are response file's EOL markers
if (ArgPtr == nullptr)
continue;
const StringRef Arg = ArgPtr;
setDriverModeFromOption(Arg);
}
}
void Driver::setDriverModeFromOption(StringRef Opt) {
const std::string OptName =
getOpts().getOption(options::OPT_driver_mode).getPrefixedName();
if (!Opt.startswith(OptName))
return;
StringRef Value = Opt.drop_front(OptName.size());
const unsigned M = llvm::StringSwitch<unsigned>(Value)
.Case("gcc", GCCMode)
.Case("g++", GXXMode)
.Case("cpp", CPPMode)
.Case("cl", CLMode)
.Default(~0U);
if (M != ~0U)
Mode = static_cast<DriverMode>(M);
else
Diag(diag::err_drv_unsupported_option_argument) << OptName << Value;
}
InputArgList Driver::ParseArgStrings(ArrayRef<const char *> ArgStrings) {
llvm::PrettyStackTraceString CrashInfo("Command line argument parsing");
unsigned IncludedFlagsBitmask;
unsigned ExcludedFlagsBitmask;
std::tie(IncludedFlagsBitmask, ExcludedFlagsBitmask) =
getIncludeExcludeOptionFlagMasks();
unsigned MissingArgIndex, MissingArgCount;
InputArgList Args =
getOpts().ParseArgs(ArgStrings, MissingArgIndex, MissingArgCount,
IncludedFlagsBitmask, ExcludedFlagsBitmask);
// Check for missing argument error.
if (MissingArgCount)
Diag(clang::diag::err_drv_missing_argument)
<< Args.getArgString(MissingArgIndex) << MissingArgCount;
// Check for unsupported options.
for (const Arg *A : Args) {
if (A->getOption().hasFlag(options::Unsupported)) {
Diag(clang::diag::err_drv_unsupported_opt) << A->getAsString(Args);
continue;
}
// Warn about -mcpu= without an argument.
if (A->getOption().matches(options::OPT_mcpu_EQ) && A->containsValue("")) {
Diag(clang::diag::warn_drv_empty_joined_argument) << A->getAsString(Args);
}
}
for (const Arg *A : Args.filtered(options::OPT_UNKNOWN))
Diags.Report(IsCLMode() ? diag::warn_drv_unknown_argument_clang_cl :
diag::err_drv_unknown_argument)
<< A->getAsString(Args);
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))) {
FinalPhase = phases::Preprocess;
// --precompile only runs up to precompilation.
} else if ((PhaseArg = DAL.getLastArg(options::OPT__precompile))) {
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_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__migrate)) ||
(PhaseArg = DAL.getLastArg(options::OPT__analyze,
options::OPT__analyze_auto)) ||
(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;
// Otherwise do everything.
} else
FinalPhase = phases::Link;
if (FinalPhaseArg)
*FinalPhaseArg = PhaseArg;
return FinalPhase;
}
static Arg *MakeInputArg(DerivedArgList &Args, OptTable *Opts,
StringRef Value) {
Arg *A = new Arg(Opts->getOption(options::OPT_INPUT), Value,
Args.getBaseArgs().MakeIndex(Value), Value.data());
Args.AddSynthesizedArg(A);
A->claim();
return A;
}
DerivedArgList *Driver::TranslateInputArgs(const InputArgList &Args) const {
DerivedArgList *DAL = new DerivedArgList(Args);
bool HasNostdlib = Args.hasArg(options::OPT_nostdlib);
bool HasNodefaultlib = Args.hasArg(options::OPT_nodefaultlibs);
for (Arg *A : Args) {
// 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->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 && 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));
continue;
}
DAL->append(A);
}
// Enforce -static if -miamcu is present.
if (Args.hasFlag(options::OPT_miamcu, options::OPT_mno_iamcu, false))
DAL->AddFlagArg(0, 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;
}
/// \brief 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 DefaultTargetTriple,
const ArgList &Args,
StringRef DarwinArchName = "") {
// FIXME: Already done in Compilation *Driver::BuildCompilation
if (const Arg *A = Args.getLastArg(options::OPT_target))
DefaultTargetTriple = A->getValue();
llvm::Triple Target(llvm::Triple::normalize(DefaultTargetTriple));
// Handle Apple-specific options available here.
if (Target.isOSBinFormatMachO()) {
// If an explict Darwin arch name is given, that trumps all.
if (!DarwinArchName.empty()) {
tools::darwin::setTripleTypeForMachOArchName(Target, DarwinArchName);
return Target;
}
// Handle the Darwin '-arch' flag.
if (Arg *A = Args.getLastArg(options::OPT_arch)) {
StringRef ArchName = A->getValue();
tools::darwin::setTripleTypeForMachOArchName(Target, ArchName);
}
}
// Handle pseudo-target flags '-mlittle-endian'/'-EL' and
// '-mbig-endian'/'-EB'.
if (Arg *A = Args.getLastArg(options::OPT_mlittle_endian,
options::OPT_mbig_endian)) {
if (A->getOption().matches(options::OPT_mlittle_endian)) {
llvm::Triple LE = Target.getLittleEndianArchVariant();
if (LE.getArch() != llvm::Triple::UnknownArch)
Target = std::move(LE);
} else {
llvm::Triple BE = Target.getBigEndianArchVariant();
if (BE.getArch() != llvm::Triple::UnknownArch)
Target = std::move(BE);
}
}
// Skip further flag support on OSes which don't support '-m32' or '-m64'.
if (Target.getArch() == llvm::Triple::tce ||
Target.getOS() == llvm::Triple::Minix)
return Target;
// 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);
if (A) {
llvm::Triple::ArchType AT = llvm::Triple::UnknownArch;
if (A->getOption().matches(options::OPT_m64)) {
AT = Target.get64BitArchVariant().getArch();
if (Target.getEnvironment() == llvm::Triple::GNUX32)
Target.setEnvironment(llvm::Triple::GNU);
} else if (A->getOption().matches(options::OPT_mx32) &&
Target.get64BitArchVariant().getArch() == llvm::Triple::x86_64) {
AT = llvm::Triple::x86_64;
Target.setEnvironment(llvm::Triple::GNUX32);
} else if (A->getOption().matches(options::OPT_m32)) {
AT = Target.get32BitArchVariant().getArch();
if (Target.getEnvironment() == llvm::Triple::GNUX32)
Target.setEnvironment(llvm::Triple::GNU);
} 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);
}
// 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");
}
return Target;
}
// \brief Parse the LTO options and record the type of LTO compilation
// based on which -f(no-)?lto(=.*)? option occurs last.
void Driver::setLTOMode(const llvm::opt::ArgList &Args) {
LTOMode = LTOK_None;
if (!Args.hasFlag(options::OPT_flto, options::OPT_flto_EQ,
options::OPT_fno_lto, false))
return;
StringRef LTOName("full");
const Arg *A = Args.getLastArg(options::OPT_flto_EQ);
if (A)
LTOName = A->getValue();
LTOMode = llvm::StringSwitch<LTOKind>(LTOName)
.Case("full", LTOK_Full)
.Case("thin", LTOK_Thin)
.Default(LTOK_Unknown);
if (LTOMode == LTOK_Unknown) {
assert(A);
Diag(diag::err_drv_unsupported_option_argument) << A->getOption().getName()
<< A->getValue();
}
}
/// 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->getOption().getName() << A->getValue();
else
// FIXME: We could use a nicer diagnostic here.
Diag(diag::err_drv_unsupported_opt) << "-fopenmp";
}
return RT;
}
void Driver::CreateOffloadingDeviceToolChains(Compilation &C,
InputList &Inputs) {
//
// CUDA
//
// We need to generate a CUDA toolchain if any of the inputs has a CUDA type.
if (llvm::any_of(Inputs, [](std::pair<types::ID, const llvm::opt::Arg *> &I) {
return types::isCuda(I.first);
})) {
const ToolChain *HostTC = C.getSingleOffloadToolChain<Action::OFK_Host>();
const llvm::Triple &HostTriple = HostTC->getTriple();
llvm::Triple CudaTriple(HostTriple.isArch64Bit() ? "nvptx64-nvidia-cuda"
: "nvptx-nvidia-cuda");
// Use the CUDA and host triples as the key into the ToolChains map, because
// the device toolchain we create depends on both.
ToolChain *&CudaTC = ToolChains[CudaTriple.str() + "/" + HostTriple.str()];
if (!CudaTC) {
CudaTC = new toolchains::CudaToolChain(*this, CudaTriple, *HostTC,
C.getInputArgs());
}
C.addOffloadDeviceToolChain(CudaTC, Action::OFK_Cuda);
}
//
// OpenMP
//
// We need to generate an OpenMP toolchain if the user specified targets with
// the -fopenmp-targets option.
if (Arg *OpenMPTargets =
C.getInputArgs().getLastArg(options::OPT_fopenmp_targets_EQ)) {
if (OpenMPTargets->getNumValues()) {
// We expect that -fopenmp-targets is always used in conjunction with the
// option -fopenmp specifying a valid runtime with offloading support,
// i.e. libomp or libiomp.
bool HasValidOpenMPRuntime = C.getInputArgs().hasFlag(
options::OPT_fopenmp, options::OPT_fopenmp_EQ,
options::OPT_fno_openmp, false);
if (HasValidOpenMPRuntime) {
OpenMPRuntimeKind OpenMPKind = getOpenMPRuntime(C.getInputArgs());
HasValidOpenMPRuntime =
OpenMPKind == OMPRT_OMP || OpenMPKind == OMPRT_IOMP5;
}
if (HasValidOpenMPRuntime) {
llvm::StringMap<const char *> FoundNormalizedTriples;
for (const char *Val : OpenMPTargets->getValues()) {
llvm::Triple TT(Val);
std::string NormalizedName = TT.normalize();
// Make sure we don't have a duplicate triple.
auto Duplicate = FoundNormalizedTriples.find(NormalizedName);
if (Duplicate != FoundNormalizedTriples.end()) {
Diag(clang::diag::warn_drv_omp_offload_target_duplicate)
<< Val << Duplicate->second;
continue;
}
// Store the current triple so that we can check for duplicates in the
// following iterations.
FoundNormalizedTriples[NormalizedName] = Val;
// If the specified target is invalid, emit a diagnostic.
if (TT.getArch() == llvm::Triple::UnknownArch)
Diag(clang::diag::err_drv_invalid_omp_target) << Val;
else {
const ToolChain &TC = getToolChain(C.getInputArgs(), TT);
C.addOffloadDeviceToolChain(&TC, Action::OFK_OpenMP);
}
}
} else
Diag(clang::diag::err_drv_expecting_fopenmp_with_fopenmp_targets);
} else
Diag(clang::diag::warn_drv_empty_joined_argument)
<< OpenMPTargets->getAsString(C.getInputArgs());
}
//
// TODO: Add support for other offloading programming models here.
//
return;
}
Compilation *Driver::BuildCompilation(ArrayRef<const char *> ArgList) {
llvm::PrettyStackTraceString CrashInfo("Compilation construction");
// FIXME: Handle environment options which affect driver behavior, somewhere
// (client?). GCC_EXEC_PREFIX, LPATH, CC_PRINT_OPTIONS.
if (Optional<std::string> CompilerPathValue =
llvm::sys::Process::GetEnv("COMPILER_PATH")) {
StringRef CompilerPath = *CompilerPathValue;
while (!CompilerPath.empty()) {
std::pair<StringRef, StringRef> Split =
CompilerPath.split(llvm::sys::EnvPathSeparator);
PrefixDirs.push_back(Split.first);
CompilerPath = Split.second;
}
}
// We look for the driver mode option early, because the mode can affect
// how other options are parsed.
ParseDriverMode(ClangExecutable, ArgList.slice(1));
// FIXME: What are we going to do with -V and -b?
// FIXME: This stuff needs to go into the Compilation, not the driver.
bool CCCPrintPhases;
InputArgList Args = ParseArgStrings(ArgList.slice(1));
// Silence driver warnings if requested
Diags.setIgnoreAllWarnings(Args.hasArg(options::OPT_w));
// -no-canonical-prefixes is used very early in main.
Args.ClaimAllArgs(options::OPT_no_canonical_prefixes);
// Ignore -pipe.
Args.ClaimAllArgs(options::OPT_pipe);
// Extract -ccc args.
//
// FIXME: We need to figure out where this behavior should live. Most of it
// should be outside in the client; the parts that aren't should have proper
// options, either by introducing new ones or by overloading gcc ones like -V
// or -b.
CCCPrintPhases = Args.hasArg(options::OPT_ccc_print_phases);
CCCPrintBindings = Args.hasArg(options::OPT_ccc_print_bindings);
if (const Arg *A = Args.getLastArg(options::OPT_ccc_gcc_name))
CCCGenericGCCName = A->getValue();
CCCUsePCH =
Args.hasFlag(options::OPT_ccc_pch_is_pch, options::OPT_ccc_pch_is_pth);
GenReproducer = Args.hasFlag(options::OPT_gen_reproducer,
options::OPT_fno_crash_diagnostics,
!!::getenv("FORCE_CLANG_DIAGNOSTICS_CRASH"));
// FIXME: DefaultTargetTriple is used by the target-prefixed calls to as/ld
// and getToolChain is const.
if (IsCLMode()) {
// clang-cl targets MSVC-style Win32.
llvm::Triple T(DefaultTargetTriple);
T.setOS(llvm::Triple::Win32);
T.setVendor(llvm::Triple::PC);
T.setEnvironment(llvm::Triple::MSVC);
DefaultTargetTriple = T.str();
}
if (const Arg *A = Args.getLastArg(options::OPT_target))
DefaultTargetTriple = A->getValue();
if (const Arg *A = Args.getLastArg(options::OPT_ccc_install_dir))
Dir = InstalledDir = A->getValue();
for (const Arg *A : Args.filtered(options::OPT_B)) {
A->claim();
PrefixDirs.push_back(A->getValue(0));
}
if (const Arg *A = Args.getLastArg(options::OPT__sysroot_EQ))
SysRoot = A->getValue();
if (const Arg *A = Args.getLastArg(options::OPT__dyld_prefix_EQ))
DyldPrefix = A->getValue();
if (Args.hasArg(options::OPT_nostdlib))
UseStdLib = false;
if (const Arg *A = Args.getLastArg(options::OPT_resource_dir))
ResourceDir = A->getValue();
if (const Arg *A = Args.getLastArg(options::OPT_save_temps_EQ)) {
SaveTemps = llvm::StringSwitch<SaveTempsMode>(A->getValue())
.Case("cwd", SaveTempsCwd)
.Case("obj", SaveTempsObj)
.Default(SaveTempsCwd);
}
setLTOMode(Args);
// Process -fembed-bitcode= flags.
if (Arg *A = Args.getLastArg(options::OPT_fembed_bitcode_EQ)) {
StringRef Name = A->getValue();
unsigned Model = llvm::StringSwitch<unsigned>(Name)
.Case("off", EmbedNone)
.Case("all", EmbedBitcode)
.Case("bitcode", EmbedBitcode)
.Case("marker", EmbedMarker)
.Default(~0U);
if (Model == ~0U) {
Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
<< Name;
} else
BitcodeEmbed = static_cast<BitcodeEmbedMode>(Model);
}
std::unique_ptr<llvm::opt::InputArgList> UArgs =
llvm::make_unique<InputArgList>(std::move(Args));
// Perform the default argument translations.
DerivedArgList *TranslatedArgs = TranslateInputArgs(*UArgs);
// Owned by the host.
const ToolChain &TC = getToolChain(
*UArgs, computeTargetTriple(*this, DefaultTargetTriple, *UArgs));
// The compilation takes ownership of Args.
Compilation *C = new Compilation(*this, TC, UArgs.release(), TranslatedArgs);
if (!HandleImmediateArgs(*C))
return C;
// Construct the list of inputs.
InputList Inputs;
BuildInputs(C->getDefaultToolChain(), *TranslatedArgs, Inputs);
// Populate the tool chains for the offloading devices, if any.
CreateOffloadingDeviceToolChains(*C, Inputs);
// Construct the list of abstract actions to perform for this compilation. On
// MachO targets this uses the driver-driver and universal actions.
if (TC.getTriple().isOSBinFormatMachO())
BuildUniversalActions(*C, C->getDefaultToolChain(), Inputs);
else
BuildActions(*C, C->getArgs(), Inputs, C->getActions());
if (CCCPrintPhases) {
PrintActions(*C);
return C;
}
BuildJobs(*C);
return C;
}
static void printArgList(raw_ostream &OS, const llvm::opt::ArgList &Args) {
llvm::opt::ArgStringList ASL;
for (const auto *A : Args)
A->render(Args, ASL);
for (auto I = ASL.begin(), E = ASL.end(); I != E; ++I) {
if (I != ASL.begin())
OS << ' ';
Command::printArg(OS, *I, true);
}
OS << '\n';
}
bool Driver::getCrashDiagnosticFile(StringRef ReproCrashFilename,
SmallString<128> &CrashDiagDir) {
using namespace llvm::sys;
assert(llvm::Triple(llvm::sys::getProcessTriple()).isOSDarwin() &&
"Only knows about .crash files on Darwin");
// The .crash file can be found on at ~/Library/Logs/DiagnosticReports/
// (or /Library/Logs/DiagnosticReports for root) and has the filename pattern
// clang-<VERSION>_<YYYY-MM-DD-HHMMSS>_<hostname>.crash.
path::home_directory(CrashDiagDir);
if (CrashDiagDir.startswith("/var/root"))
CrashDiagDir = "/";
path::append(CrashDiagDir, "Library/Logs/DiagnosticReports");
int PID =
#if LLVM_ON_UNIX
getpid();
#else
0;
#endif
std::error_code EC;
fs::file_status FileStatus;
TimePoint<> LastAccessTime;
SmallString<128> CrashFilePath;
// Lookup the .crash files and get the one generated by a subprocess spawned
// by this driver invocation.
for (fs::directory_iterator File(CrashDiagDir, EC), FileEnd;
File != FileEnd && !EC; File.increment(EC)) {
StringRef FileName = path::filename(File->path());
if (!FileName.startswith(Name))
continue;
if (fs::status(File->path(), FileStatus))
continue;
llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> CrashFile =
llvm::MemoryBuffer::getFile(File->path());
if (!CrashFile)
continue;
// The first line should start with "Process:", otherwise this isn't a real
// .crash file.
StringRef Data = CrashFile.get()->getBuffer();
if (!Data.startswith("Process:"))
continue;
// Parse parent process pid line, e.g: "Parent Process: clang-4.0 [79141]"
size_t ParentProcPos = Data.find("Parent Process:");
if (ParentProcPos == StringRef::npos)
continue;
size_t LineEnd = Data.find_first_of("\n", ParentProcPos);
if (LineEnd == StringRef::npos)
continue;
StringRef ParentProcess = Data.slice(ParentProcPos+15, LineEnd).trim();
int OpenBracket = -1, CloseBracket = -1;
for (size_t i = 0, e = ParentProcess.size(); i < e; ++i) {
if (ParentProcess[i] == '[')
OpenBracket = i;
if (ParentProcess[i] == ']')
CloseBracket = i;
}
// Extract the parent process PID from the .crash file and check whether
// it matches this driver invocation pid.
int CrashPID;
if (OpenBracket < 0 || CloseBracket < 0 ||
ParentProcess.slice(OpenBracket + 1, CloseBracket)
.getAsInteger(10, CrashPID) || CrashPID != PID) {
continue;
}
// Found a .crash file matching the driver pid. To avoid getting an older
// and misleading crash file, continue looking for the most recent.
// FIXME: the driver can dispatch multiple cc1 invocations, leading to
// multiple crashes poiting to the same parent process. Since the driver
// does not collect pid information for the dispatched invocation there's
// currently no way to distinguish among them.
const auto FileAccessTime = FileStatus.getLastModificationTime();
if (FileAccessTime > LastAccessTime) {
CrashFilePath.assign(File->path());
LastAccessTime = FileAccessTime;
}
}
// If found, copy it over to the location of other reproducer files.
if (!CrashFilePath.empty()) {
EC = fs::copy_file(CrashFilePath, ReproCrashFilename);
if (EC)
return false;
return true;
}
return false;
}
// When clang crashes, produce diagnostic information including the fully
// preprocessed source file(s). Request that the developer attach the
// diagnostic information to a bug report.
void Driver::generateCompilationDiagnostics(Compilation &C,
const Command &FailingCommand) {
if (C.getArgs().hasArg(options::OPT_fno_crash_diagnostics))
return;
// Don't try to generate diagnostics for link or dsymutil jobs.
if (FailingCommand.getCreator().isLinkJob() ||
FailingCommand.getCreator().isDsymutilJob())
return;
// Print the version of the compiler.
PrintVersion(C, llvm::errs());
Diag(clang::diag::note_drv_command_failed_diag_msg)
<< "PLEASE submit a bug report to " BUG_REPORT_URL " and include the "
"crash backtrace, preprocessed source, and associated run script.";
// Suppress driver output and emit preprocessor output to temp file.
Mode = CPPMode;
CCGenDiagnostics = true;
// Save the original job command(s).
Command Cmd = FailingCommand;
// Keep track of whether we produce any errors while trying to produce
// preprocessed sources.
DiagnosticErrorTrap Trap(Diags);
// Suppress tool output.
C.initCompilationForDiagnostics();
// Construct the list of inputs.
InputList Inputs;
BuildInputs(C.getDefaultToolChain(), C.getArgs(), Inputs);
for (InputList::iterator it = Inputs.begin(), ie = Inputs.end(); it != ie;) {
bool IgnoreInput = false;
// Ignore input from stdin or any inputs that cannot be preprocessed.
// Check type first as not all linker inputs have a value.
if (types::getPreprocessedType(it->first) == types::TY_INVALID) {
IgnoreInput = true;
} else if (!strcmp(it->second->getValue(), "-")) {
Diag(clang::diag::note_drv_command_failed_diag_msg)
<< "Error generating preprocessed source(s) - "
"ignoring input from stdin.";
IgnoreInput = true;
}
if (IgnoreInput) {
it = Inputs.erase(it);
ie = Inputs.end();
} else {
++it;
}
}
if (Inputs.empty()) {
Diag(clang::diag::note_drv_command_failed_diag_msg)
<< "Error generating preprocessed source(s) - "
"no preprocessable inputs.";
return;
}
// Don't attempt to generate preprocessed files if multiple -arch options are
// used, unless they're all duplicates.
llvm::StringSet<> ArchNames;
for (const Arg *A : C.getArgs()) {
if (A->getOption().matches(options::OPT_arch)) {
StringRef ArchName = A->getValue();
ArchNames.insert(ArchName);
}
}
if (ArchNames.size() > 1) {
Diag(clang::diag::note_drv_command_failed_diag_msg)
<< "Error generating preprocessed source(s) - cannot generate "
"preprocessed source with multiple -arch options.";
return;
}
// Construct the list of abstract actions to perform for this compilation. On
// Darwin OSes this uses the driver-driver and builds universal actions.
const ToolChain &TC = C.getDefaultToolChain();
if (TC.getTriple().isOSBinFormatMachO())
BuildUniversalActions(C, TC, Inputs);
else
BuildActions(C, C.getArgs(), Inputs, C.getActions());
BuildJobs(C);
// If there were errors building the compilation, quit now.
if (Trap.hasErrorOccurred()) {
Diag(clang::diag::note_drv_command_failed_diag_msg)
<< "Error generating preprocessed source(s).";
return;
}
// Generate preprocessed output.
SmallVector<std::pair<int, const Command *>, 4> FailingCommands;
C.ExecuteJobs(C.getJobs(), FailingCommands);
// If any of the preprocessing commands failed, clean up and exit.
if (!FailingCommands.empty()) {
if (!isSaveTempsEnabled())
C.CleanupFileList(C.getTempFiles(), true);
Diag(clang::diag::note_drv_command_failed_diag_msg)
<< "Error generating preprocessed source(s).";
return;
}
const ArgStringList &TempFiles = C.getTempFiles();
if (TempFiles.empty()) {
Diag(clang::diag::note_drv_command_failed_diag_msg)
<< "Error generating preprocessed source(s).";
return;
}
Diag(clang::diag::note_drv_command_failed_diag_msg)
<< "\n********************\n\n"
"PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:\n"
"Preprocessed source(s) and associated run script(s) are located at:";
SmallString<128> VFS;
SmallString<128> ReproCrashFilename;
for (const char *TempFile : TempFiles) {
Diag(clang::diag::note_drv_command_failed_diag_msg) << TempFile;
if (ReproCrashFilename.empty()) {
ReproCrashFilename = TempFile;
llvm::sys::path::replace_extension(ReproCrashFilename, ".crash");
}
if (StringRef(TempFile).endswith(".cache")) {
// In some cases (modules) we'll dump extra data to help with reproducing
// the crash into a directory next to the output.
VFS = llvm::sys::path::filename(TempFile);
llvm::sys::path::append(VFS, "vfs", "vfs.yaml");
}
}
// Assume associated files are based off of the first temporary file.
CrashReportInfo CrashInfo(TempFiles[0], VFS);
std::string Script = CrashInfo.Filename.rsplit('.').first.str() + ".sh";
std::error_code EC;
llvm::raw_fd_ostream ScriptOS(Script, EC, llvm::sys::fs::F_Excl);
if (EC) {
Diag(clang::diag::note_drv_command_failed_diag_msg)
<< "Error generating run script: " + Script + " " + EC.message();
} else {
ScriptOS << "# Crash reproducer for " << getClangFullVersion() << "\n"
<< "# Driver args: ";
printArgList(ScriptOS, C.getInputArgs());
ScriptOS << "# Original command: ";
Cmd.Print(ScriptOS, "\n", /*Quote=*/true);
Cmd.Print(ScriptOS, "\n", /*Quote=*/true, &CrashInfo);
Diag(clang::diag::note_drv_command_failed_diag_msg) << Script;
}
// On darwin, provide information about the .crash diagnostic report.
if (llvm::Triple(llvm::sys::getProcessTriple()).isOSDarwin()) {
SmallString<128> CrashDiagDir;
if (getCrashDiagnosticFile(ReproCrashFilename, CrashDiagDir)) {
Diag(clang::diag::note_drv_command_failed_diag_msg)
<< ReproCrashFilename.str();
} else { // Suggest a directory for the user to look for .crash files.
llvm::sys::path::append(CrashDiagDir, Name);
CrashDiagDir += "_<YYYY-MM-DD-HHMMSS>_<hostname>.crash";
Diag(clang::diag::note_drv_command_failed_diag_msg)
<< "Crash backtrace is located in";
Diag(clang::diag::note_drv_command_failed_diag_msg)
<< CrashDiagDir.str();
Diag(clang::diag::note_drv_command_failed_diag_msg)
<< "(choose the .crash file that corresponds to your crash)";
}
}
for (const auto &A : C.getArgs().filtered(options::OPT_frewrite_map_file,
options::OPT_frewrite_map_file_EQ))
Diag(clang::diag::note_drv_command_failed_diag_msg) << A->getValue();
Diag(clang::diag::note_drv_command_failed_diag_msg)
<< "\n\n********************";
}
void Driver::setUpResponseFiles(Compilation &C, Command &Cmd) {
// Since commandLineFitsWithinSystemLimits() may underestimate system's capacity
// if the tool does not support response files, there is a chance/ that things
// will just work without a response file, so we silently just skip it.
if (Cmd.getCreator().getResponseFilesSupport() == Tool::RF_None ||
llvm::sys::commandLineFitsWithinSystemLimits(Cmd.getExecutable(), Cmd.getArguments()))
return;
std::string TmpName = GetTemporaryPath("response", "txt");
Cmd.setResponseFile(C.addTempFile(C.getArgs().MakeArgString(TmpName)));
}
int Driver::ExecuteCompilation(
Compilation &C,
SmallVectorImpl<std::pair<int, const Command *>> &FailingCommands) {
// Just print if -### was present.
if (C.getArgs().hasArg(options::OPT__HASH_HASH_HASH)) {
C.getJobs().Print(llvm::errs(), "\n", true);
return 0;
}
// If there were errors building the compilation, quit now.
if (Diags.hasErrorOccurred())
return 1;
// Set up response file names for each command, if necessary
for (auto &Job : C.getJobs())
setUpResponseFiles(C, Job);
C.ExecuteJobs(C.getJobs(), FailingCommands);
// Remove temp files.
C.CleanupFileList(C.getTempFiles());
// If the command succeeded, we are done.
if (FailingCommands.empty())
return 0;
// Otherwise, remove result files and print extra information about abnormal
// failures.
for (const auto &CmdPair : FailingCommands) {
int Res = CmdPair.first;
const Command *FailingCommand = CmdPair.second;
// Remove result files if we're not saving temps.
if (!isSaveTempsEnabled()) {
const JobAction *JA = cast<JobAction>(&FailingCommand->getSource());
C.CleanupFileMap(C.getResultFiles(), JA, true);
// Failure result files are valid unless we crashed.
if (Res < 0)
C.CleanupFileMap(C.getFailureResultFiles(), JA, true);
}
// Print extra information about abnormal failures, if possible.
//
// This is ad-hoc, but we don't want to be excessively noisy. If the result
// status was 1, assume the command failed normally. In particular, if it
// was the compiler then assume it gave a reasonable error code. Failures
// in other tools are less common, and they generally have worse
// diagnostics, so always print the diagnostic there.
const Tool &FailingTool = FailingCommand->getCreator();
if (!FailingCommand->getCreator().hasGoodDiagnostics() || Res != 1) {
// FIXME: See FIXME above regarding result code interpretation.
if (Res < 0)
Diag(clang::diag::err_drv_command_signalled)
<< FailingTool.getShortName();
else
Diag(clang::diag::err_drv_command_failed) << FailingTool.getShortName()
<< Res;
}
}
return 0;
}
void Driver::PrintHelp(bool ShowHidden) const {
unsigned IncludedFlagsBitmask;
unsigned ExcludedFlagsBitmask;
std::tie(IncludedFlagsBitmask, ExcludedFlagsBitmask) =
getIncludeExcludeOptionFlagMasks();
ExcludedFlagsBitmask |= options::NoDriverOption;
if (!ShowHidden)
ExcludedFlagsBitmask |= HelpHidden;
getOpts().PrintHelp(llvm::outs(), Name.c_str(), DriverTitle.c_str(),
IncludedFlagsBitmask, ExcludedFlagsBitmask);
}
void Driver::PrintVersion(const Compilation &C, raw_ostream &OS) const {
// FIXME: The following handlers should use a callback mechanism, we don't
// know what the client would like to do.
OS << getClangFullVersion() << '\n';
const ToolChain &TC = C.getDefaultToolChain();
OS << "Target: " << TC.getTripleString() << '\n';
// Print the threading model.
if (Arg *A = C.getArgs().getLastArg(options::OPT_mthread_model)) {
// Don't print if the ToolChain would have barfed on it already
if (TC.isThreadModelSupported(A->getValue()))
OS << "Thread model: " << A->getValue();
} else
OS << "Thread model: " << TC.getThreadModel();
OS << '\n';
// Print out the install directory.
OS << "InstalledDir: " << InstalledDir << '\n';
}
/// PrintDiagnosticCategories - Implement the --print-diagnostic-categories
/// option.
static void PrintDiagnosticCategories(raw_ostream &OS) {
// Skip the empty category.
for (unsigned i = 1, max = DiagnosticIDs::getNumberOfCategories(); i != max;
++i)
OS << i << ',' << DiagnosticIDs::getCategoryNameFromID(i) << '\n';
}
bool Driver::HandleImmediateArgs(const Compilation &C) {
// The order these options are handled in gcc is all over the place, but we
// don't expect inconsistencies w.r.t. that to matter in practice.
if (C.getArgs().hasArg(options::OPT_dumpmachine)) {
llvm::outs() << C.getDefaultToolChain().getTripleString() << '\n';
return false;
}
if (C.getArgs().hasArg(options::OPT_dumpversion)) {
// Since -dumpversion is only implemented for pedantic GCC compatibility, we
// return an answer which matches our definition of __VERSION__.
//
// If we want to return a more correct answer some day, then we should
// introduce a non-pedantically GCC compatible mode to Clang in which we
// provide sensible definitions for -dumpversion, __VERSION__, etc.
llvm::outs() << "4.2.1\n";
return false;
}
if (C.getArgs().hasArg(options::OPT__print_diagnostic_categories)) {
PrintDiagnosticCategories(llvm::outs());
return false;
}
if (C.getArgs().hasArg(options::OPT_help) ||
C.getArgs().hasArg(options::OPT__help_hidden)) {
PrintHelp(C.getArgs().hasArg(options::OPT__help_hidden));
return false;
}
if (C.getArgs().hasArg(options::OPT__version)) {
// Follow gcc behavior and use stdout for --version and stderr for -v.
PrintVersion(C, llvm::outs());
return false;
}
if (C.getArgs().hasArg(options::OPT_v) ||
C.getArgs().hasArg(options::OPT__HASH_HASH_HASH)) {
PrintVersion(C, llvm::errs());
SuppressMissingInputWarning = true;
}
const ToolChain &TC = C.getDefaultToolChain();
if (C.getArgs().hasArg(options::OPT_v))
TC.printVerboseInfo(llvm::errs());
if (C.getArgs().hasArg(options::OPT_print_search_dirs)) {
llvm::outs() << "programs: =";
bool separator = false;
for (const std::string &Path : TC.getProgramPaths()) {
if (separator)
llvm::outs() << ':';
llvm::outs() << Path;
separator = true;
}
llvm::outs() << "\n";
llvm::outs() << "libraries: =" << ResourceDir;
StringRef sysroot = C.getSysRoot();
for (const std::string &Path : TC.getFilePaths()) {
// Always print a separator. ResourceDir was the first item shown.
llvm::outs() << ':';
// Interpretation of leading '=' is needed only for NetBSD.
if (Path[0] == '=')
llvm::outs() << sysroot << Path.substr(1);
else
llvm::outs() << Path;
}
llvm::outs() << "\n";
return false;
}
// FIXME: The following handlers should use a callback mechanism, we don't
// know what the client would like to do.
if (Arg *A = C.getArgs().getLastArg(options::OPT_print_file_name_EQ)) {
llvm::outs() << GetFilePath(A->getValue(), TC) << "\n";
return false;
}
if (Arg *A = C.getArgs().getLastArg(options::OPT_print_prog_name_EQ)) {
llvm::outs() << GetProgramPath(A->getValue(), TC) << "\n";
return false;
}
if (C.getArgs().hasArg(options::OPT_print_libgcc_file_name)) {
ToolChain::RuntimeLibType RLT = TC.GetRuntimeLibType(C.getArgs());
switch (RLT) {
case ToolChain::RLT_CompilerRT:
llvm::outs() << TC.getCompilerRT(C.getArgs(), "builtins") << "\n";
break;
case ToolChain::RLT_Libgcc:
llvm::outs() << GetFilePath("libgcc.a", TC) << "\n";
break;
}
return false;
}
if (C.getArgs().hasArg(options::OPT_print_multi_lib)) {
for (const Multilib &Multilib : TC.getMultilibs())
llvm::outs() << Multilib << "\n";
return false;
}
if (C.getArgs().hasArg(options::OPT_print_multi_directory)) {
for (const Multilib &Multilib : TC.getMultilibs()) {
if (Multilib.gccSuffix().empty())
llvm::outs() << ".\n";
else {
StringRef Suffix(Multilib.gccSuffix());
assert(Suffix.front() == '/');
llvm::outs() << Suffix.substr(1) << "\n";
}
}
return false;
}
return true;
}
// Display an action graph human-readably. Action A is the "sink" node
// and latest-occuring action. Traversal is in pre-order, visiting the
// inputs to each action before printing the action itself.
static unsigned PrintActions1(const Compilation &C, Action *A,
std::map<Action *, unsigned> &Ids) {
if (Ids.count(A)) // A was already visited.
return Ids[A];
std::string str;
llvm::raw_string_ostream os(str);
os << Action::getClassName(A->getKind()) << ", ";
if (InputAction *IA = dyn_cast<InputAction>(A)) {
os << "\"" << IA->getInputArg().getValue() << "\"";
} else if (BindArchAction *BIA = dyn_cast<BindArchAction>(A)) {
os << '"' << BIA->getArchName() << '"' << ", {"
<< PrintActions1(C, *BIA->input_begin(), Ids) << "}";
} else if (OffloadAction *OA = dyn_cast<OffloadAction>(A)) {
bool IsFirst = true;
OA->doOnEachDependence(
[&](Action *A, const ToolChain *TC, const char *BoundArch) {
// E.g. for two CUDA device dependences whose bound arch is sm_20 and
// sm_35 this will generate:
// "cuda-device" (nvptx64-nvidia-cuda:sm_20) {#ID}, "cuda-device"
// (nvptx64-nvidia-cuda:sm_35) {#ID}
if (!IsFirst)
os << ", ";
os << '"';
if (TC)
os << A->getOffloadingKindPrefix();
else
os << "host";
os << " (";
os << TC->getTriple().normalize();
if (BoundArch)
os << ":" << BoundArch;
os << ")";
os << '"';
os << " {" << PrintActions1(C, A, Ids) << "}";
IsFirst = false;
});
} else {
const ActionList *AL = &A->getInputs();
if (AL->size()) {
const char *Prefix = "{";
for (Action *PreRequisite : *AL) {
os << Prefix << PrintActions1(C, PreRequisite, Ids);
Prefix = ", ";
}
os << "}";
} else
os << "{}";
}
// Append offload info for all options other than the offloading action
// itself (e.g. (cuda-device, sm_20) or (cuda-host)).
std::string offload_str;
llvm::raw_string_ostream offload_os(offload_str);
if (!isa<OffloadAction>(A)) {
auto S = A->getOffloadingKindPrefix();
if (!S.empty()) {
offload_os << ", (" << S;
if (A->getOffloadingArch())
offload_os << ", " << A->getOffloadingArch();
offload_os << ")";
}
}
unsigned Id = Ids.size();
Ids[A] = Id;
llvm::errs() << Id << ": " << os.str() << ", "
<< types::getTypeName(A->getType()) << offload_os.str() << "\n";
return Id;
}
// Print the action graphs in a compilation C.
// For example "clang -c file1.c file2.c" is composed of two subgraphs.
void Driver::PrintActions(const Compilation &C) const {
std::map<Action *, unsigned> Ids;
for (Action *A : C.getActions())
PrintActions1(C, A, Ids);
}
/// \brief Check whether the given input tree contains any compilation or
/// assembly actions.
static bool ContainsCompileOrAssembleAction(const Action *A) {
if (isa<CompileJobAction>(A) || isa<BackendJobAction>(A) ||
isa<AssembleJobAction>(A))
return true;
for (const Action *Input : A->inputs())
if (ContainsCompileOrAssembleAction(Input))
return true;
return false;
}
void Driver::BuildUniversalActions(Compilation &C, const ToolChain &TC,
const InputList &BAInputs) const {
DerivedArgList &Args = C.getArgs();
ActionList &Actions = C.getActions();
llvm::PrettyStackTraceString CrashInfo("Building universal build actions");
// Collect the list of architectures. Duplicates are allowed, but should only
// be handled once (in the order seen).
llvm::StringSet<> ArchNames;
SmallVector<const char *, 4> Archs;
for (Arg *A : Args) {
if (A->getOption().matches(options::OPT_arch)) {
// Validate the option here; we don't save the type here because its
// particular spelling may participate in other driver choices.
llvm::Triple::ArchType Arch =
tools::darwin::getArchTypeForMachOArchName(A->getValue());
if (Arch == llvm::Triple::UnknownArch) {
Diag(clang::diag::err_drv_invalid_arch_name) << A->getAsString(Args);
continue;
}
A->claim();
if (ArchNames.insert(A->getValue()).second)
Archs.push_back(A->getValue());
}
}
// When there is no explicit arch for this platform, make sure we still bind
// the architecture (to the default) so that -Xarch_ is handled correctly.
if (!Archs.size())
Archs.push_back(Args.MakeArgString(TC.getDefaultUniversalArchName()));
ActionList SingleActions;
BuildActions(C, Args, BAInputs, SingleActions);
// Add in arch bindings for every top level action, as well as lipo and
// dsymutil steps if needed.
for (Action* Act : SingleActions) {
// Make sure we can lipo this kind of output. If not (and it is an actual
// output) then we disallow, since we can't create an output file with the
// right name without overwriting it. We could remove this oddity by just
// changing the output names to include the arch, which would also fix
// -save-temps. Compatibility wins for now.
if (Archs.size() > 1 && !types::canLipoType(Act->getType()))
Diag(clang::diag::err_drv_invalid_output_with_multiple_archs)
<< types::getTypeName(Act->getType());
ActionList Inputs;
for (unsigned i = 0, e = Archs.size(); i != e; ++i)
Inputs.push_back(C.MakeAction<BindArchAction>(Act, Archs[i]));
// Lipo if necessary, we do it this way because we need to set the arch flag
// so that -Xarch_ gets overwritten.
if (Inputs.size() == 1 || Act->getType() == types::TY_Nothing)
Actions.append(Inputs.begin(), Inputs.end());
else
Actions.push_back(C.MakeAction<LipoJobAction>(Inputs, Act->getType()));
// Handle debug info queries.
Arg *A = Args.getLastArg(options::OPT_g_Group);
if (A && !A->getOption().matches(options::OPT_g0) &&
!A->getOption().matches(options::OPT_gstabs) &&
ContainsCompileOrAssembleAction(Actions.back())) {
// Add a 'dsymutil' step if necessary, when debug info is enabled and we
// have a compile input. We need to run 'dsymutil' ourselves in such cases
// because the debug info will refer to a temporary object file which
// will be removed at the end of the compilation process.
if (Act->getType() == types::TY_Image) {
ActionList Inputs;
Inputs.push_back(Actions.back());
Actions.pop_back();
Actions.push_back(
C.MakeAction<DsymutilJobAction>(Inputs, types::TY_dSYM));
}
// Verify the debug info output.
if (Args.hasArg(options::OPT_verify_debug_info)) {
Action* LastAction = Actions.back();
Actions.pop_back();
Actions.push_back(C.MakeAction<VerifyDebugInfoJobAction>(
LastAction, types::TY_Nothing));
}
}
}
}
/// \brief Check that the file referenced by Value exists. If it doesn't,
/// issue a diagnostic and return false.
static bool DiagnoseInputExistence(const Driver &D, const DerivedArgList &Args,
StringRef Value, types::ID Ty) {
if (!D.getCheckInputsExist())
return true;
// stdin always exists.
if (Value == "-")
return true;
SmallString<64> Path(Value);
if (Arg *WorkDir = Args.getLastArg(options::OPT_working_directory)) {
if (!llvm::sys::path::is_absolute(Path)) {
SmallString<64> Directory(WorkDir->getValue());
llvm::sys::path::append(Directory, Value);
Path.assign(Directory);
}
}
if (llvm::sys::fs::exists(Twine(Path)))
return true;
if (D.IsCLMode()) {
if (!llvm::sys::path::is_absolute(Twine(Path)) &&
llvm::sys::Process::FindInEnvPath("LIB", Value))
return true;
if (Args.hasArg(options::OPT__SLASH_link) && Ty == types::TY_Object) {
// Arguments to the /link flag might cause the linker to search for object
// and library files in paths we don't know about. Don't error in such
// cases.
return true;
}
}
D.Diag(clang::diag::err_drv_no_such_file) << Path;
return false;
}
// Construct a the list of inputs and their types.
void Driver::BuildInputs(const ToolChain &TC, DerivedArgList &Args,
InputList &Inputs) const {
// Track the current user specified (-x) input. We also explicitly track the
// argument used to set the type; we only want to claim the type when we
// actually use it, so we warn about unused -x arguments.
types::ID InputType = types::TY_Nothing;
Arg *InputTypeArg = nullptr;
// The last /TC or /TP option sets the input type to C or C++ globally.
if (Arg *TCTP = Args.getLastArgNoClaim(options::OPT__SLASH_TC,
options::OPT__SLASH_TP)) {
InputTypeArg = TCTP;
InputType = TCTP->getOption().matches(options::OPT__SLASH_TC)
? types::TY_C
: types::TY_CXX;
arg_iterator it =
Args.filtered_begin(options::OPT__SLASH_TC, options::OPT__SLASH_TP);
const arg_iterator ie = Args.filtered_end();
Arg *Previous = *it++;
bool ShowNote = false;
while (it != ie) {
Diag(clang::diag::warn_drv_overriding_flag_option)
<< Previous->getSpelling() << (*it)->getSpelling();
Previous = *it++;
ShowNote = true;
}
if (ShowNote)
Diag(clang::diag::note_drv_t_option_is_global);
// No driver mode exposes -x and /TC or /TP; we don't support mixing them.
assert(!Args.hasArg(options::OPT_x) && "-x and /TC or /TP is not allowed");
}
for (Arg *A : Args) {
if (A->getOption().getKind() == Option::InputClass) {
const char *Value = A->getValue();
types::ID Ty = types::TY_INVALID;
// Infer the input type if necessary.
if (InputType == types::TY_Nothing) {
// If there was an explicit arg for this, claim it.
if (InputTypeArg)
InputTypeArg->claim();
// stdin must be handled specially.
if (memcmp(Value, "-", 2) == 0) {
// If running with -E, treat as a C input (this changes the builtin
// macros, for example). This may be overridden by -ObjC below.
//
// Otherwise emit an error but still use a valid type to avoid
// spurious errors (e.g., no inputs).
if (!Args.hasArgNoClaim(options::OPT_E) && !CCCIsCPP())
Diag(IsCLMode() ? clang::diag::err_drv_unknown_stdin_type_clang_cl
: clang::diag::err_drv_unknown_stdin_type);
Ty = types::TY_C;
} else {
// Otherwise lookup by extension.
// Fallback is C if invoked as C preprocessor or Object otherwise.
// We use a host hook here because Darwin at least has its own
// idea of what .s is.
if (const char *Ext = strrchr(Value, '.'))
Ty = TC.LookupTypeForExtension(Ext + 1);
if (Ty == types::TY_INVALID) {
if (CCCIsCPP())
Ty = types::TY_C;
else
Ty = types::TY_Object;
}
// If the driver is invoked as C++ compiler (like clang++ or c++) it
// should autodetect some input files as C++ for g++ compatibility.
if (CCCIsCXX()) {
types::ID OldTy = Ty;
Ty = types::lookupCXXTypeForCType(Ty);
if (Ty != OldTy)
Diag(clang::diag::warn_drv_treating_input_as_cxx)
<< getTypeName(OldTy) << getTypeName(Ty);
}
}
// -ObjC and -ObjC++ override the default language, but only for "source
// files". We just treat everything that isn't a linker input as a
// source file.
//
// FIXME: Clean this up if we move the phase sequence into the type.
if (Ty != types::TY_Object) {
if (Args.hasArg(options::OPT_ObjC))
Ty = types::TY_ObjC;
else if (Args.hasArg(options::OPT_ObjCXX))
Ty = types::TY_ObjCXX;
}
} else {
assert(InputTypeArg && "InputType set w/o InputTypeArg");
if (!InputTypeArg->getOption().matches(options::OPT_x)) {
// If emulating cl.exe, make sure that /TC and /TP don't affect input
// object files.
const char *Ext = strrchr(Value, '.');
if (Ext && TC.LookupTypeForExtension(Ext + 1) == types::TY_Object)
Ty = types::TY_Object;
}
if (Ty == types::TY_INVALID) {
Ty = InputType;
InputTypeArg->claim();
}
}
if (DiagnoseInputExistence(*this, Args, Value, Ty))
Inputs.push_back(std::make_pair(Ty, A));
} else if (A->getOption().matches(options::OPT__SLASH_Tc)) {
StringRef Value = A->getValue();
if (DiagnoseInputExistence(*this, Args, Value, types::TY_C)) {
Arg *InputArg = MakeInputArg(Args, Opts, A->getValue());
Inputs.push_back(std::make_pair(types::TY_C, InputArg));
}
A->claim();
} else if (A->getOption().matches(options::OPT__SLASH_Tp)) {
StringRef Value = A->getValue();
if (DiagnoseInputExistence(*this, Args, Value, types::TY_CXX)) {
Arg *InputArg = MakeInputArg(Args, Opts, A->getValue());
Inputs.push_back(std::make_pair(types::TY_CXX, InputArg));
}
A->claim();
} else if (A->getOption().hasFlag(options::LinkerInput)) {
// Just treat as object type, we could make a special type for this if
// necessary.
Inputs.push_back(std::make_pair(types::TY_Object, A));
} else if (A->getOption().matches(options::OPT_x)) {
InputTypeArg = A;
InputType = types::lookupTypeForTypeSpecifier(A->getValue());
A->claim();
// Follow gcc behavior and treat as linker input for invalid -x
// options. Its not clear why we shouldn't just revert to unknown; but
// this isn't very important, we might as well be bug compatible.
if (!InputType) {
Diag(clang::diag::err_drv_unknown_language) << A->getValue();
InputType = types::TY_Object;
}
}
}
if (CCCIsCPP() && Inputs.empty()) {
// If called as standalone preprocessor, stdin is processed
// if no other input is present.
Arg *A = MakeInputArg(Args, Opts, "-");
Inputs.push_back(std::make_pair(types::TY_C, A));
}
}
namespace {
/// Provides a convenient interface for different programming models to generate
/// the required device actions.
class OffloadingActionBuilder final {
/// Flag used to trace errors in the builder.
bool IsValid = false;
/// The compilation that is using this builder.
Compilation &C;
/// Map between an input argument and the offload kinds used to process it.
std::map<const Arg *, unsigned> InputArgToOffloadKindMap;
/// Builder interface. It doesn't build anything or keep any state.
class DeviceActionBuilder {
public:
typedef llvm::SmallVector<phases::ID, phases::MaxNumberOfPhases> PhasesTy;
enum ActionBuilderReturnCode {
// The builder acted successfully on the current action.
ABRT_Success,
// The builder didn't have to act on the current action.
ABRT_Inactive,
// The builder was successful and requested the host action to not be
// generated.
ABRT_Ignore_Host,
};
protected:
/// Compilation associated with this builder.
Compilation &C;
/// Tool chains associated with this builder. The same programming
/// model may have associated one or more tool chains.
SmallVector<const ToolChain *, 2> ToolChains;
/// The derived arguments associated with this builder.
DerivedArgList &Args;
/// The inputs associated with this builder.
const Driver::InputList &Inputs;
/// The associated offload kind.
Action::OffloadKind AssociatedOffloadKind = Action::OFK_None;
public:
DeviceActionBuilder(Compilation &C, DerivedArgList &Args,
const Driver::InputList &Inputs,
Action::OffloadKind AssociatedOffloadKind)
: C(C), Args(Args), Inputs(Inputs),
AssociatedOffloadKind(AssociatedOffloadKind) {}
virtual ~DeviceActionBuilder() {}
/// Fill up the array \a DA with all the device dependences that should be
/// added to the provided host action \a HostAction. By default it is
/// inactive.
virtual ActionBuilderReturnCode
getDeviceDependences(OffloadAction::DeviceDependences &DA,
phases::ID CurPhase, phases::ID FinalPhase,
PhasesTy &Phases) {
return ABRT_Inactive;
}
/// Update the state to include the provided host action \a HostAction as a
/// dependency of the current device action. By default it is inactive.
virtual ActionBuilderReturnCode addDeviceDepences(Action *HostAction) {
return ABRT_Inactive;
}
/// Append top level actions generated by the builder. Return true if errors
/// were found.
virtual void appendTopLevelActions(ActionList &AL) {}
/// Append linker actions generated by the builder. Return true if errors
/// were found.
virtual void appendLinkDependences(OffloadAction::DeviceDependences &DA) {}
/// Initialize the builder. Return true if any initialization errors are
/// found.
virtual bool initialize() { return false; }
/// Return true if the builder can use bundling/unbundling.
virtual bool canUseBundlerUnbundler() const { return false; }
/// Return true if this builder is valid. We have a valid builder if we have
/// associated device tool chains.
bool isValid() { return !ToolChains.empty(); }
/// Return the associated offload kind.
Action::OffloadKind getAssociatedOffloadKind() {
return AssociatedOffloadKind;
}
};
/// \brief CUDA action builder. It injects device code in the host backend
/// action.
class CudaActionBuilder final : public DeviceActionBuilder {
/// Flags to signal if the user requested host-only or device-only
/// compilation.
bool CompileHostOnly = false;
bool CompileDeviceOnly = false;
/// List of GPU architectures to use in this compilation.
SmallVector<CudaArch, 4> GpuArchList;
/// The CUDA actions for the current input.
ActionList CudaDeviceActions;
/// The CUDA fat binary if it was generated for the current input.
Action *CudaFatBinary = nullptr;
/// Flag that is set to true if this builder acted on the current input.
bool IsActive = false;
public:
CudaActionBuilder(Compilation &C, DerivedArgList &Args,
const Driver::InputList &Inputs)
: DeviceActionBuilder(C, Args, Inputs, Action::OFK_Cuda) {}
ActionBuilderReturnCode
getDeviceDependences(OffloadAction::DeviceDependences &DA,
phases::ID CurPhase, phases::ID FinalPhase,
PhasesTy &Phases) override {
if (!IsActive)
return ABRT_Inactive;
// If we don't have more CUDA actions, we don't have any dependences to
// create for the host.
if (CudaDeviceActions.empty())
return ABRT_Success;
assert(CudaDeviceActions.size() == GpuArchList.size() &&
"Expecting one action per GPU architecture.");
assert(!CompileHostOnly &&
"Not expecting CUDA actions in host-only compilation.");
// If we are generating code for the device or we are in a backend phase,
// we attempt to generate the fat binary. We compile each arch to ptx and
// assemble to cubin, then feed the cubin *and* the ptx into a device
// "link" action, which uses fatbinary to combine these cubins into one
// fatbin. The fatbin is then an input to the host action if not in
// device-only mode.
if (CompileDeviceOnly || CurPhase == phases::Backend) {
ActionList DeviceActions;
for (unsigned I = 0, E = GpuArchList.size(); I != E; ++I) {
// Produce the device action from the current phase up to the assemble
// phase.
for (auto Ph : Phases) {
// Skip the phases that were already dealt with.
if (Ph < CurPhase)
continue;
// We have to be consistent with the host final phase.
if (Ph > FinalPhase)
break;
CudaDeviceActions[I] = C.getDriver().ConstructPhaseAction(
C, Args, Ph, CudaDeviceActions[I]);
if (Ph == phases::Assemble)
break;
}
// If we didn't reach the assemble phase, we can't generate the fat
// binary. We don't need to generate the fat binary if we are not in
// device-only mode.
if (!isa<AssembleJobAction>(CudaDeviceActions[I]) ||
CompileDeviceOnly)
continue;
Action *AssembleAction = CudaDeviceActions[I];
assert(AssembleAction->getType() == types::TY_Object);
assert(AssembleAction->getInputs().size() == 1);
Action *BackendAction = AssembleAction->getInputs()[0];
assert(BackendAction->getType() == types::TY_PP_Asm);
for (auto &A : {AssembleAction, BackendAction}) {
OffloadAction::DeviceDependences DDep;
DDep.add(*A, *ToolChains.front(), CudaArchToString(GpuArchList[I]),
Action::OFK_Cuda);
DeviceActions.push_back(
C.MakeAction<OffloadAction>(DDep, A->getType()));
}
}
// We generate the fat binary if we have device input actions.
if (!DeviceActions.empty()) {
CudaFatBinary =
C.MakeAction<LinkJobAction>(DeviceActions, types::TY_CUDA_FATBIN);
if (!CompileDeviceOnly) {
DA.add(*CudaFatBinary, *ToolChains.front(), /*BoundArch=*/nullptr,
Action::OFK_Cuda);
// Clear the fat binary, it is already a dependence to an host
// action.
CudaFatBinary = nullptr;
}
// Remove the CUDA actions as they are already connected to an host
// action or fat binary.
CudaDeviceActions.clear();
}
// We avoid creating host action in device-only mode.
return CompileDeviceOnly ? ABRT_Ignore_Host : ABRT_Success;
} else if (CurPhase > phases::Backend) {
// If we are past the backend phase and still have a device action, we
// don't have to do anything as this action is already a device
// top-level action.
return ABRT_Success;
}
assert(CurPhase < phases::Backend && "Generating single CUDA "
"instructions should only occur "
"before the backend phase!");
// By default, we produce an action for each device arch.
for (Action *&A : CudaDeviceActions)
A = C.getDriver().ConstructPhaseAction(C, Args, CurPhase, A);
return ABRT_Success;
}
ActionBuilderReturnCode addDeviceDepences(Action *HostAction) override {
// While generating code for CUDA, we only depend on the host input action
// to trigger the creation of all the CUDA device actions.
// If we are dealing with an input action, replicate it for each GPU
// architecture. If we are in host-only mode we return 'success' so that
// the host uses the CUDA offload kind.
if (auto *IA = dyn_cast<InputAction>(HostAction)) {
assert(!GpuArchList.empty() &&
"We should have at least one GPU architecture.");
// If the host input is not CUDA, we don't need to bother about this
// input.
if (IA->getType() != types::TY_CUDA) {
// The builder will ignore this input.
IsActive = false;
return ABRT_Inactive;
}
// Set the flag to true, so that the builder acts on the current input.
IsActive = true;
if (CompileHostOnly)
return ABRT_Success;
// Replicate inputs for each GPU architecture.
for (unsigned I = 0, E = GpuArchList.size(); I != E; ++I)
CudaDeviceActions.push_back(C.MakeAction<InputAction>(
IA->getInputArg(), types::TY_CUDA_DEVICE));
return ABRT_Success;
}
return IsActive ? ABRT_Success : ABRT_Inactive;
}
void appendTopLevelActions(ActionList &AL) override {
// Utility to append actions to the top level list.
auto AddTopLevel = [&](Action *A, CudaArch BoundArch) {
OffloadAction::DeviceDependences Dep;
Dep.add(*A, *ToolChains.front(), CudaArchToString(BoundArch),
Action::OFK_Cuda);
AL.push_back(C.MakeAction<OffloadAction>(Dep, A->getType()));
};
// If we have a fat binary, add it to the list.
if (CudaFatBinary) {
AddTopLevel(CudaFatBinary, CudaArch::UNKNOWN);
CudaDeviceActions.clear();
CudaFatBinary = nullptr;
return;
}
if (CudaDeviceActions.empty())
return;
// If we have CUDA actions at this point, that's because we have a have
// partial compilation, so we should have an action for each GPU
// architecture.
assert(CudaDeviceActions.size() == GpuArchList.size() &&
"Expecting one action per GPU architecture.");
assert(ToolChains.size() == 1 &&
"Expecting to have a sing CUDA toolchain.");
for (unsigned I = 0, E = GpuArchList.size(); I != E; ++I)
AddTopLevel(CudaDeviceActions[I], GpuArchList[I]);
CudaDeviceActions.clear();
}
bool initialize() override {
// We don't need to support CUDA.
if (!C.hasOffloadToolChain<Action::OFK_Cuda>())
return false;
const ToolChain *HostTC = C.getSingleOffloadToolChain<Action::OFK_Host>();
assert(HostTC && "No toolchain for host compilation.");
if (HostTC->getTriple().isNVPTX()) {
// We do not support targeting NVPTX for host compilation. Throw
// an error and abort pipeline construction early so we don't trip
// asserts that assume device-side compilation.
C.getDriver().Diag(diag::err_drv_cuda_nvptx_host);
return true;
}
ToolChains.push_back(C.getSingleOffloadToolChain<Action::OFK_Cuda>());
Arg *PartialCompilationArg = Args.getLastArg(
options::OPT_cuda_host_only, options::OPT_cuda_device_only,
options::OPT_cuda_compile_host_device);
CompileHostOnly = PartialCompilationArg &&
PartialCompilationArg->getOption().matches(
options::OPT_cuda_host_only);
CompileDeviceOnly = PartialCompilationArg &&
PartialCompilationArg->getOption().matches(
options::OPT_cuda_device_only);
// Collect all cuda_gpu_arch parameters, removing duplicates.
std::set<CudaArch> GpuArchs;
bool Error = false;
for (Arg *A : Args) {
if (!(A->getOption().matches(options::OPT_cuda_gpu_arch_EQ) ||
A->getOption().matches(options::OPT_no_cuda_gpu_arch_EQ)))
continue;
A->claim();
const StringRef ArchStr = A->getValue();
if (A->getOption().matches(options::OPT_no_cuda_gpu_arch_EQ) &&
ArchStr == "all") {
GpuArchs.clear();
continue;
}
CudaArch Arch = StringToCudaArch(ArchStr);
if (Arch == CudaArch::UNKNOWN) {
C.getDriver().Diag(clang::diag::err_drv_cuda_bad_gpu_arch) << ArchStr;
Error = true;
} else if (A->getOption().matches(options::OPT_cuda_gpu_arch_EQ))
GpuArchs.insert(Arch);
else if (A->getOption().matches(options::OPT_no_cuda_gpu_arch_EQ))
GpuArchs.erase(Arch);
else
llvm_unreachable("Unexpected option.");
}
// Collect list of GPUs remaining in the set.
for (CudaArch Arch : GpuArchs)
GpuArchList.push_back(Arch);
// Default to sm_20 which is the lowest common denominator for
// supported GPUs. sm_20 code should work correctly, if
// suboptimally, on all newer GPUs.
if (GpuArchList.empty())
GpuArchList.push_back(CudaArch::SM_20);
return Error;
}
};
/// OpenMP action builder. The host bitcode is passed to the device frontend
/// and all the device linked images are passed to the host link phase.
class OpenMPActionBuilder final : public DeviceActionBuilder {
/// The OpenMP actions for the current input.
ActionList OpenMPDeviceActions;
/// The linker inputs obtained for each toolchain.
SmallVector<ActionList, 8> DeviceLinkerInputs;
public:
OpenMPActionBuilder(Compilation &C, DerivedArgList &Args,
const Driver::InputList &Inputs)
: DeviceActionBuilder(C, Args, Inputs, Action::OFK_OpenMP) {}
ActionBuilderReturnCode
getDeviceDependences(OffloadAction::DeviceDependences &DA,
phases::ID CurPhase, phases::ID FinalPhase,
PhasesTy &Phases) override {
// We should always have an action for each input.
assert(OpenMPDeviceActions.size() == ToolChains.size() &&
"Number of OpenMP actions and toolchains do not match.");
// The host only depends on device action in the linking phase, when all
// the device images have to be embedded in the host image.
if (CurPhase == phases::Link) {
assert(ToolChains.size() == DeviceLinkerInputs.size() &&
"Toolchains and linker inputs sizes do not match.");
auto LI = DeviceLinkerInputs.begin();
for (auto *A : OpenMPDeviceActions) {
LI->push_back(A);
++LI;
}
// We passed the device action as a host dependence, so we don't need to
// do anything else with them.
OpenMPDeviceActions.clear();
return ABRT_Success;
}
// By default, we produce an action for each device arch.
for (Action *&A : OpenMPDeviceActions)
A = C.getDriver().ConstructPhaseAction(C, Args, CurPhase, A);
return ABRT_Success;
}
ActionBuilderReturnCode addDeviceDepences(Action *HostAction) override {
// If this is an input action replicate it for each OpenMP toolchain.
if (auto *IA = dyn_cast<InputAction>(HostAction)) {
OpenMPDeviceActions.clear();
for (unsigned I = 0; I < ToolChains.size(); ++I)
OpenMPDeviceActions.push_back(
C.MakeAction<InputAction>(IA->getInputArg(), IA->getType()));
return ABRT_Success;
}
// If this is an unbundling action use it as is for each OpenMP toolchain.
if (auto *UA = dyn_cast<OffloadUnbundlingJobAction>(HostAction)) {
OpenMPDeviceActions.clear();
for (unsigned I = 0; I < ToolChains.size(); ++I) {
OpenMPDeviceActions.push_back(UA);
UA->registerDependentActionInfo(
ToolChains[I], /*BoundArch=*/StringRef(), Action::OFK_OpenMP);
}
return ABRT_Success;
}
// When generating code for OpenMP we use the host compile phase result as
// a dependence to the device compile phase so that it can learn what
// declarations should be emitted. However, this is not the only use for
// the host action, so we prevent it from being collapsed.
if (isa<CompileJobAction>(HostAction)) {
HostAction->setCannotBeCollapsedWithNextDependentAction();
assert(ToolChains.size() == OpenMPDeviceActions.size() &&
"Toolchains and device action sizes do not match.");
OffloadAction::HostDependence HDep(
*HostAction, *C.getSingleOffloadToolChain<Action::OFK_Host>(),
/*BoundArch=*/nullptr, Action::OFK_OpenMP);
auto TC = ToolChains.begin();
for (Action *&A : OpenMPDeviceActions) {
assert(isa<CompileJobAction>(A));
OffloadAction::DeviceDependences DDep;
DDep.add(*A, **TC, /*BoundArch=*/nullptr, Action::OFK_OpenMP);
A = C.MakeAction<OffloadAction>(HDep, DDep);
++TC;
}
}
return ABRT_Success;
}
void appendTopLevelActions(ActionList &AL) override {
if (OpenMPDeviceActions.empty())
return;
// We should always have an action for each input.
assert(OpenMPDeviceActions.size() == ToolChains.size() &&
"Number of OpenMP actions and toolchains do not match.");
// Append all device actions followed by the proper offload action.
auto TI = ToolChains.begin();
for (auto *A : OpenMPDeviceActions) {
OffloadAction::DeviceDependences Dep;
Dep.add(*A, **TI, /*BoundArch=*/nullptr, Action::OFK_OpenMP);
AL.push_back(C.MakeAction<OffloadAction>(Dep, A->getType()));
++TI;
}
// We no longer need the action stored in this builder.
OpenMPDeviceActions.clear();
}
void appendLinkDependences(OffloadAction::DeviceDependences &DA) override {
assert(ToolChains.size() == DeviceLinkerInputs.size() &&
"Toolchains and linker inputs sizes do not match.");
// Append a new link action for each device.
auto TC = ToolChains.begin();
for (auto &LI : DeviceLinkerInputs) {
auto *DeviceLinkAction =
C.MakeAction<LinkJobAction>(LI, types::TY_Image);
DA.add(*DeviceLinkAction, **TC, /*BoundArch=*/nullptr,
Action::OFK_OpenMP);
++TC;
}
}
bool initialize() override {
// Get the OpenMP toolchains. If we don't get any, the action builder will
// know there is nothing to do related to OpenMP offloading.
auto OpenMPTCRange = C.getOffloadToolChains<Action::OFK_OpenMP>();
for (auto TI = OpenMPTCRange.first, TE = OpenMPTCRange.second; TI != TE;
++TI)
ToolChains.push_back(TI->second);
DeviceLinkerInputs.resize(ToolChains.size());
return false;
}
bool canUseBundlerUnbundler() const override {
// OpenMP should use bundled files whenever possible.
return true;
}
};
///
/// TODO: Add the implementation for other specialized builders here.
///
/// Specialized builders being used by this offloading action builder.
SmallVector<DeviceActionBuilder *, 4> SpecializedBuilders;
/// Flag set to true if all valid builders allow file bundling/unbundling.
bool CanUseBundler;
public:
OffloadingActionBuilder(Compilation &C, DerivedArgList &Args,
const Driver::InputList &Inputs)
: C(C) {
// Create a specialized builder for each device toolchain.
IsValid = true;
// Create a specialized builder for CUDA.
SpecializedBuilders.push_back(new CudaActionBuilder(C, Args, Inputs));
// Create a specialized builder for OpenMP.
SpecializedBuilders.push_back(new OpenMPActionBuilder(C, Args, Inputs));
//
// TODO: Build other specialized builders here.
//
// Initialize all the builders, keeping track of errors. If all valid
// builders agree that we can use bundling, set the flag to true.
unsigned ValidBuilders = 0u;
unsigned ValidBuildersSupportingBundling = 0u;
for (auto *SB : SpecializedBuilders) {
IsValid = IsValid && !SB->initialize();
// Update the counters if the builder is valid.
if (SB->isValid()) {
++ValidBuilders;
if (SB->canUseBundlerUnbundler())
++ValidBuildersSupportingBundling;
}
}
CanUseBundler =
ValidBuilders && ValidBuilders == ValidBuildersSupportingBundling;
}
~OffloadingActionBuilder() {
for (auto *SB : SpecializedBuilders)
delete SB;
}
/// Generate an action that adds device dependences (if any) to a host action.
/// If no device dependence actions exist, just return the host action \a
/// HostAction. If an error is found or if no builder requires the host action
/// to be generated, return nullptr.
Action *
addDeviceDependencesToHostAction(Action *HostAction, const Arg *InputArg,
phases::ID CurPhase, phases::ID FinalPhase,
DeviceActionBuilder::PhasesTy &Phases) {
if (!IsValid)
return nullptr;
if (SpecializedBuilders.empty())
return HostAction;
assert(HostAction && "Invalid host action!");
OffloadAction::DeviceDependences DDeps;
// Check if all the programming models agree we should not emit the host
// action. Also, keep track of the offloading kinds employed.
auto &OffloadKind = InputArgToOffloadKindMap[InputArg];
unsigned InactiveBuilders = 0u;
unsigned IgnoringBuilders = 0u;
for (auto *SB : SpecializedBuilders) {
if (!SB->isValid()) {
++InactiveBuilders;
continue;
}
auto RetCode =
SB->getDeviceDependences(DDeps, CurPhase, FinalPhase, Phases);
// If the builder explicitly says the host action should be ignored,
// we need to increment the variable that tracks the builders that request
// the host object to be ignored.
if (RetCode == DeviceActionBuilder::ABRT_Ignore_Host)
++IgnoringBuilders;
// Unless the builder was inactive for this action, we have to record the
// offload kind because the host will have to use it.
if (RetCode != DeviceActionBuilder::ABRT_Inactive)
OffloadKind |= SB->getAssociatedOffloadKind();
}
// If all builders agree that the host object should be ignored, just return
// nullptr.
if (IgnoringBuilders &&
SpecializedBuilders.size() == (InactiveBuilders + IgnoringBuilders))
return nullptr;
if (DDeps.getActions().empty())
return HostAction;
// We have dependences we need to bundle together. We use an offload action
// for that.
OffloadAction::HostDependence HDep(
*HostAction, *C.getSingleOffloadToolChain<Action::OFK_Host>(),
/*BoundArch=*/nullptr, DDeps);
return C.MakeAction<OffloadAction>(HDep, DDeps);
}
/// Generate an action that adds a host dependence to a device action. The
/// results will be kept in this action builder. Return true if an error was
/// found.
bool addHostDependenceToDeviceActions(Action *&HostAction,
const Arg *InputArg) {
if (!IsValid)
return true;
// If we are supporting bundling/unbundling and the current action is an
// input action of non-source file, we replace the host action by the
// unbundling action. The bundler tool has the logic to detect if an input
// is a bundle or not and if the input is not a bundle it assumes it is a
// host file. Therefore it is safe to create an unbundling action even if
// the input is not a bundle.
if (CanUseBundler && isa<InputAction>(HostAction) &&
InputArg->getOption().getKind() == llvm::opt::Option::InputClass &&
!types::isSrcFile(HostAction->getType())) {
auto UnbundlingHostAction =
C.MakeAction<OffloadUnbundlingJobAction>(HostAction);
UnbundlingHostAction->registerDependentActionInfo(
C.getSingleOffloadToolChain<Action::OFK_Host>(),
/*BoundArch=*/StringRef(), Action::OFK_Host);
HostAction = UnbundlingHostAction;
}
assert(HostAction && "Invalid host action!");
// Register the offload kinds that are used.
auto &OffloadKind = InputArgToOffloadKindMap[InputArg];
for (auto *SB : SpecializedBuilders) {
if (!SB->isValid())
continue;
auto RetCode = SB->addDeviceDepences(HostAction);
// Host dependences for device actions are not compatible with that same
// action being ignored.
assert(RetCode != DeviceActionBuilder::ABRT_Ignore_Host &&
"Host dependence not expected to be ignored.!");
// Unless the builder was inactive for this action, we have to record the
// offload kind because the host will have to use it.
if (RetCode != DeviceActionBuilder::ABRT_Inactive)
OffloadKind |= SB->getAssociatedOffloadKind();
}
return false;
}
/// Add the offloading top level actions to the provided action list. This
/// function can replace the host action by a bundling action if the
/// programming models allow it.
bool appendTopLevelActions(ActionList &AL, Action *HostAction,
const Arg *InputArg) {
// Get the device actions to be appended.
ActionList OffloadAL;
for (auto *SB : SpecializedBuilders) {
if (!SB->isValid())
continue;
SB->appendTopLevelActions(OffloadAL);
}
// If we can use the bundler, replace the host action by the bundling one in
// the resulting list. Otherwise, just append the device actions.
if (CanUseBundler && !OffloadAL.empty()) {
// Add the host action to the list in order to create the bundling action.
OffloadAL.push_back(HostAction);
// We expect that the host action was just appended to the action list
// before this method was called.
assert(HostAction == AL.back() && "Host action not in the list??");
HostAction = C.MakeAction<OffloadBundlingJobAction>(OffloadAL);
AL.back() = HostAction;
} else
AL.append(OffloadAL.begin(), OffloadAL.end());
// Propagate to the current host action (if any) the offload information
// associated with the current input.
if (HostAction)
HostAction->propagateHostOffloadInfo(InputArgToOffloadKindMap[InputArg],
/*BoundArch=*/nullptr);
return false;
}
/// Processes the host linker action. This currently consists of replacing it
/// with an offload action if there are device link objects and propagate to
/// the host action all the offload kinds used in the current compilation. The
/// resulting action is returned.
Action *processHostLinkAction(Action *HostAction) {
// Add all the dependences from the device linking actions.
OffloadAction::DeviceDependences DDeps;
for (auto *SB : SpecializedBuilders) {
if (!SB->isValid())
continue;
SB->appendLinkDependences(DDeps);
}
// Calculate all the offload kinds used in the current compilation.
unsigned ActiveOffloadKinds = 0u;
for (auto &I : InputArgToOffloadKindMap)
ActiveOffloadKinds |= I.second;
// If we don't have device dependencies, we don't have to create an offload
// action.
if (DDeps.getActions().empty()) {
// Propagate all the active kinds to host action. Given that it is a link
// action it is assumed to depend on all actions generated so far.
HostAction->propagateHostOffloadInfo(ActiveOffloadKinds,
/*BoundArch=*/nullptr);
return HostAction;
}
// Create the offload action with all dependences. When an offload action
// is created the kinds are propagated to the host action, so we don't have
// to do that explicitly here.
OffloadAction::HostDependence HDep(
*HostAction, *C.getSingleOffloadToolChain<Action::OFK_Host>(),
/*BoundArch*/ nullptr, ActiveOffloadKinds);
return C.MakeAction<OffloadAction>(HDep, DDeps);
}
};
} // anonymous namespace.
void Driver::BuildActions(Compilation &C, DerivedArgList &Args,
const InputList &Inputs, ActionList &Actions) const {
llvm::PrettyStackTraceString CrashInfo("Building compilation actions");
if (!SuppressMissingInputWarning && Inputs.empty()) {
Diag(clang::diag::err_drv_no_input_files);
return;
}
Arg *FinalPhaseArg;
phases::ID FinalPhase = getFinalPhase(Args, &FinalPhaseArg);
if (FinalPhase == phases::Link && Args.hasArg(options::OPT_emit_llvm)) {
Diag(clang::diag::err_drv_emit_llvm_link);
}
// Reject -Z* at the top level, these options should never have been exposed
// by gcc.
if (Arg *A = Args.getLastArg(options::OPT_Z_Joined))
Diag(clang::diag::err_drv_use_of_Z_option) << A->getAsString(Args);
// Diagnose misuse of /Fo.
if (Arg *A = Args.getLastArg(options::OPT__SLASH_Fo)) {
StringRef V = A->getValue();
if (Inputs.size() > 1 && !V.empty() &&
!llvm::sys::path::is_separator(V.back())) {
// Check whether /Fo tries to name an output file for multiple inputs.
Diag(clang::diag::err_drv_out_file_argument_with_multiple_sources)
<< A->getSpelling() << V;
Args.eraseArg(options::OPT__SLASH_Fo);
}
}
// Diagnose misuse of /Fa.
if (Arg *A = Args.getLastArg(options::OPT__SLASH_Fa)) {
StringRef V = A->getValue();
if (Inputs.size() > 1 && !V.empty() &&
!llvm::sys::path::is_separator(V.back())) {
// Check whether /Fa tries to name an asm file for multiple inputs.
Diag(clang::diag::err_drv_out_file_argument_with_multiple_sources)
<< A->getSpelling() << V;
Args.eraseArg(options::OPT__SLASH_Fa);
}
}
// Diagnose misuse of /o.
if (Arg *A = Args.getLastArg(options::OPT__SLASH_o)) {
if (A->getValue()[0] == '\0') {
// It has to have a value.
Diag(clang::diag::err_drv_missing_argument) << A->getSpelling() << 1;
Args.eraseArg(options::OPT__SLASH_o);
}
}
// Diagnose unsupported forms of /Yc /Yu. Ignore /Yc/Yu for now if:
// * no filename after it
// * both /Yc and /Yu passed but with different filenames
// * corresponding file not also passed as /FI
Arg *YcArg = Args.getLastArg(options::OPT__SLASH_Yc);
Arg *YuArg = Args.getLastArg(options::OPT__SLASH_Yu);
if (YcArg && YcArg->getValue()[0] == '\0') {
Diag(clang::diag::warn_drv_ycyu_no_arg_clang_cl) << YcArg->getSpelling();
Args.eraseArg(options::OPT__SLASH_Yc);
YcArg = nullptr;
}
if (YuArg && YuArg->getValue()[0] == '\0') {
Diag(clang::diag::warn_drv_ycyu_no_arg_clang_cl) << YuArg->getSpelling();
Args.eraseArg(options::OPT__SLASH_Yu);
YuArg = nullptr;
}
if (YcArg && YuArg && strcmp(YcArg->getValue(), YuArg->getValue()) != 0) {
Diag(clang::diag::warn_drv_ycyu_different_arg_clang_cl);
Args.eraseArg(options::OPT__SLASH_Yc);
Args.eraseArg(options::OPT__SLASH_Yu);
YcArg = YuArg = nullptr;
}
if (YcArg || YuArg) {
StringRef Val = YcArg ? YcArg->getValue() : YuArg->getValue();
bool FoundMatchingInclude = false;
for (const Arg *Inc : Args.filtered(options::OPT_include)) {
// FIXME: Do case-insensitive matching and consider / and \ as equal.
if (Inc->getValue() == Val)
FoundMatchingInclude = true;
}
if (!FoundMatchingInclude) {
Diag(clang::diag::warn_drv_ycyu_no_fi_arg_clang_cl)
<< (YcArg ? YcArg : YuArg)->getSpelling();
Args.eraseArg(options::OPT__SLASH_Yc);
Args.eraseArg(options::OPT__SLASH_Yu);
YcArg = YuArg = nullptr;
}
}
if (YcArg && Inputs.size() > 1) {
Diag(clang::diag::warn_drv_yc_multiple_inputs_clang_cl);
Args.eraseArg(options::OPT__SLASH_Yc);
YcArg = nullptr;
}
if (Args.hasArg(options::OPT__SLASH_Y_)) {
// /Y- disables all pch handling. Rather than check for it everywhere,
// just remove clang-cl pch-related flags here.
Args.eraseArg(options::OPT__SLASH_Fp);