1 //===--- Driver.cpp - Clang GCC Compatible Driver -------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "clang/Driver/Driver.h"
11 #include "InputInfo.h"
12 #include "ToolChains/AMDGPU.h"
13 #include "ToolChains/AVR.h"
14 #include "ToolChains/Ananas.h"
15 #include "ToolChains/Clang.h"
16 #include "ToolChains/CloudABI.h"
17 #include "ToolChains/Contiki.h"
18 #include "ToolChains/CrossWindows.h"
19 #include "ToolChains/Cuda.h"
20 #include "ToolChains/Darwin.h"
21 #include "ToolChains/DragonFly.h"
22 #include "ToolChains/FreeBSD.h"
23 #include "ToolChains/Fuchsia.h"
24 #include "ToolChains/Gnu.h"
25 #include "ToolChains/BareMetal.h"
26 #include "ToolChains/Haiku.h"
27 #include "ToolChains/Hexagon.h"
28 #include "ToolChains/Lanai.h"
29 #include "ToolChains/Linux.h"
30 #include "ToolChains/MinGW.h"
31 #include "ToolChains/Minix.h"
32 #include "ToolChains/MipsLinux.h"
33 #include "ToolChains/MSVC.h"
34 #include "ToolChains/Myriad.h"
35 #include "ToolChains/NaCl.h"
36 #include "ToolChains/NetBSD.h"
37 #include "ToolChains/OpenBSD.h"
38 #include "ToolChains/PS4CPU.h"
39 #include "ToolChains/Solaris.h"
40 #include "ToolChains/TCE.h"
41 #include "ToolChains/WebAssembly.h"
42 #include "ToolChains/XCore.h"
43 #include "clang/Basic/Version.h"
44 #include "clang/Basic/VirtualFileSystem.h"
45 #include "clang/Config/config.h"
46 #include "clang/Driver/Action.h"
47 #include "clang/Driver/Compilation.h"
48 #include "clang/Driver/DriverDiagnostic.h"
49 #include "clang/Driver/Job.h"
50 #include "clang/Driver/Options.h"
51 #include "clang/Driver/SanitizerArgs.h"
52 #include "clang/Driver/Tool.h"
53 #include "clang/Driver/ToolChain.h"
54 #include "llvm/ADT/ArrayRef.h"
55 #include "llvm/ADT/STLExtras.h"
56 #include "llvm/ADT/SmallSet.h"
57 #include "llvm/ADT/StringExtras.h"
58 #include "llvm/ADT/StringSet.h"
59 #include "llvm/ADT/StringSwitch.h"
60 #include "llvm/Option/Arg.h"
61 #include "llvm/Option/ArgList.h"
62 #include "llvm/Option/OptSpecifier.h"
63 #include "llvm/Option/OptTable.h"
64 #include "llvm/Option/Option.h"
65 #include "llvm/Support/CommandLine.h"
66 #include "llvm/Support/ErrorHandling.h"
67 #include "llvm/Support/FileSystem.h"
68 #include "llvm/Support/Path.h"
69 #include "llvm/Support/PrettyStackTrace.h"
70 #include "llvm/Support/Process.h"
71 #include "llvm/Support/Program.h"
72 #include "llvm/Support/TargetRegistry.h"
73 #include "llvm/Support/raw_ostream.h"
74 #include "llvm/Support/StringSaver.h"
79 #include <unistd.h> // getpid
82 using namespace clang::driver;
83 using namespace clang;
84 using namespace llvm::opt;
86 Driver::Driver(StringRef ClangExecutable, StringRef DefaultTargetTriple,
87 DiagnosticsEngine &Diags,
88 IntrusiveRefCntPtr<vfs::FileSystem> VFS)
89 : Opts(createDriverOptTable()), Diags(Diags), VFS(std::move(VFS)),
90 Mode(GCCMode), SaveTemps(SaveTempsNone), BitcodeEmbed(EmbedNone),
91 LTOMode(LTOK_None), ClangExecutable(ClangExecutable),
92 SysRoot(DEFAULT_SYSROOT),
93 DriverTitle("clang LLVM compiler"), CCPrintOptionsFilename(nullptr),
94 CCPrintHeadersFilename(nullptr), CCLogDiagnosticsFilename(nullptr),
95 CCCPrintBindings(false), CCPrintHeaders(false), CCLogDiagnostics(false),
96 CCGenDiagnostics(false), DefaultTargetTriple(DefaultTargetTriple),
97 CCCGenericGCCName(""), Saver(Alloc),
98 CheckInputsExist(true), CCCUsePCH(true),
99 GenReproducer(false), SuppressMissingInputWarning(false) {
101 // Provide a sane fallback if no VFS is specified.
103 this->VFS = vfs::getRealFileSystem();
105 Name = llvm::sys::path::filename(ClangExecutable);
106 Dir = llvm::sys::path::parent_path(ClangExecutable);
107 InstalledDir = Dir; // Provide a sensible default installed dir.
109 #if defined(CLANG_CONFIG_FILE_SYSTEM_DIR)
110 SystemConfigDir = CLANG_CONFIG_FILE_SYSTEM_DIR;
112 #if defined(CLANG_CONFIG_FILE_USER_DIR)
113 UserConfigDir = CLANG_CONFIG_FILE_USER_DIR;
116 // Compute the path to the resource directory.
117 StringRef ClangResourceDir(CLANG_RESOURCE_DIR);
118 SmallString<128> P(Dir);
119 if (ClangResourceDir != "") {
120 llvm::sys::path::append(P, ClangResourceDir);
122 StringRef ClangLibdirSuffix(CLANG_LIBDIR_SUFFIX);
123 P = llvm::sys::path::parent_path(Dir);
124 llvm::sys::path::append(P, Twine("lib") + ClangLibdirSuffix, "clang",
125 CLANG_VERSION_STRING);
127 ResourceDir = P.str();
130 void Driver::ParseDriverMode(StringRef ProgramName,
131 ArrayRef<const char *> Args) {
132 ClangNameParts = ToolChain::getTargetAndModeFromProgramName(ProgramName);
133 setDriverModeFromOption(ClangNameParts.DriverMode);
135 for (const char *ArgPtr : Args) {
136 // Ingore nullptrs, they are response file's EOL markers
137 if (ArgPtr == nullptr)
139 const StringRef Arg = ArgPtr;
140 setDriverModeFromOption(Arg);
144 void Driver::setDriverModeFromOption(StringRef Opt) {
145 const std::string OptName =
146 getOpts().getOption(options::OPT_driver_mode).getPrefixedName();
147 if (!Opt.startswith(OptName))
149 StringRef Value = Opt.drop_front(OptName.size());
151 const unsigned M = llvm::StringSwitch<unsigned>(Value)
152 .Case("gcc", GCCMode)
153 .Case("g++", GXXMode)
154 .Case("cpp", CPPMode)
159 Mode = static_cast<DriverMode>(M);
161 Diag(diag::err_drv_unsupported_option_argument) << OptName << Value;
164 InputArgList Driver::ParseArgStrings(ArrayRef<const char *> ArgStrings,
165 bool &ContainsError) {
166 llvm::PrettyStackTraceString CrashInfo("Command line argument parsing");
167 ContainsError = false;
169 unsigned IncludedFlagsBitmask;
170 unsigned ExcludedFlagsBitmask;
171 std::tie(IncludedFlagsBitmask, ExcludedFlagsBitmask) =
172 getIncludeExcludeOptionFlagMasks();
174 unsigned MissingArgIndex, MissingArgCount;
176 getOpts().ParseArgs(ArgStrings, MissingArgIndex, MissingArgCount,
177 IncludedFlagsBitmask, ExcludedFlagsBitmask);
179 // Check for missing argument error.
180 if (MissingArgCount) {
181 Diag(diag::err_drv_missing_argument)
182 << Args.getArgString(MissingArgIndex) << MissingArgCount;
184 Diags.getDiagnosticLevel(diag::err_drv_missing_argument,
185 SourceLocation()) > DiagnosticsEngine::Warning;
188 // Check for unsupported options.
189 for (const Arg *A : Args) {
190 if (A->getOption().hasFlag(options::Unsupported)) {
191 Diag(diag::err_drv_unsupported_opt) << A->getAsString(Args);
192 ContainsError |= Diags.getDiagnosticLevel(diag::err_drv_unsupported_opt,
194 DiagnosticsEngine::Warning;
198 // Warn about -mcpu= without an argument.
199 if (A->getOption().matches(options::OPT_mcpu_EQ) && A->containsValue("")) {
200 Diag(diag::warn_drv_empty_joined_argument) << A->getAsString(Args);
201 ContainsError |= Diags.getDiagnosticLevel(
202 diag::warn_drv_empty_joined_argument,
203 SourceLocation()) > DiagnosticsEngine::Warning;
207 for (const Arg *A : Args.filtered(options::OPT_UNKNOWN)) {
208 auto ID = IsCLMode() ? diag::warn_drv_unknown_argument_clang_cl
209 : diag::err_drv_unknown_argument;
211 Diags.Report(ID) << A->getAsString(Args);
212 ContainsError |= Diags.getDiagnosticLevel(ID, SourceLocation()) >
213 DiagnosticsEngine::Warning;
219 // Determine which compilation mode we are in. We look for options which
220 // affect the phase, starting with the earliest phases, and record which
221 // option we used to determine the final phase.
222 phases::ID Driver::getFinalPhase(const DerivedArgList &DAL,
223 Arg **FinalPhaseArg) const {
224 Arg *PhaseArg = nullptr;
225 phases::ID FinalPhase;
227 // -{E,EP,P,M,MM} only run the preprocessor.
228 if (CCCIsCPP() || (PhaseArg = DAL.getLastArg(options::OPT_E)) ||
229 (PhaseArg = DAL.getLastArg(options::OPT__SLASH_EP)) ||
230 (PhaseArg = DAL.getLastArg(options::OPT_M, options::OPT_MM)) ||
231 (PhaseArg = DAL.getLastArg(options::OPT__SLASH_P))) {
232 FinalPhase = phases::Preprocess;
234 // --precompile only runs up to precompilation.
235 } else if ((PhaseArg = DAL.getLastArg(options::OPT__precompile))) {
236 FinalPhase = phases::Precompile;
238 // -{fsyntax-only,-analyze,emit-ast} only run up to the compiler.
239 } else if ((PhaseArg = DAL.getLastArg(options::OPT_fsyntax_only)) ||
240 (PhaseArg = DAL.getLastArg(options::OPT_module_file_info)) ||
241 (PhaseArg = DAL.getLastArg(options::OPT_verify_pch)) ||
242 (PhaseArg = DAL.getLastArg(options::OPT_rewrite_objc)) ||
243 (PhaseArg = DAL.getLastArg(options::OPT_rewrite_legacy_objc)) ||
244 (PhaseArg = DAL.getLastArg(options::OPT__migrate)) ||
245 (PhaseArg = DAL.getLastArg(options::OPT__analyze,
246 options::OPT__analyze_auto)) ||
247 (PhaseArg = DAL.getLastArg(options::OPT_emit_ast))) {
248 FinalPhase = phases::Compile;
250 // -S only runs up to the backend.
251 } else if ((PhaseArg = DAL.getLastArg(options::OPT_S))) {
252 FinalPhase = phases::Backend;
254 // -c compilation only runs up to the assembler.
255 } else if ((PhaseArg = DAL.getLastArg(options::OPT_c))) {
256 FinalPhase = phases::Assemble;
258 // Otherwise do everything.
260 FinalPhase = phases::Link;
263 *FinalPhaseArg = PhaseArg;
268 static Arg *MakeInputArg(DerivedArgList &Args, OptTable &Opts,
270 Arg *A = new Arg(Opts.getOption(options::OPT_INPUT), Value,
271 Args.getBaseArgs().MakeIndex(Value), Value.data());
272 Args.AddSynthesizedArg(A);
277 DerivedArgList *Driver::TranslateInputArgs(const InputArgList &Args) const {
278 DerivedArgList *DAL = new DerivedArgList(Args);
280 bool HasNostdlib = Args.hasArg(options::OPT_nostdlib);
281 bool HasNodefaultlib = Args.hasArg(options::OPT_nodefaultlibs);
282 for (Arg *A : Args) {
283 // Unfortunately, we have to parse some forwarding options (-Xassembler,
284 // -Xlinker, -Xpreprocessor) because we either integrate their functionality
285 // (assembler and preprocessor), or bypass a previous driver ('collect2').
287 // Rewrite linker options, to replace --no-demangle with a custom internal
289 if ((A->getOption().matches(options::OPT_Wl_COMMA) ||
290 A->getOption().matches(options::OPT_Xlinker)) &&
291 A->containsValue("--no-demangle")) {
292 // Add the rewritten no-demangle argument.
293 DAL->AddFlagArg(A, Opts->getOption(options::OPT_Z_Xlinker__no_demangle));
295 // Add the remaining values as Xlinker arguments.
296 for (StringRef Val : A->getValues())
297 if (Val != "--no-demangle")
298 DAL->AddSeparateArg(A, Opts->getOption(options::OPT_Xlinker), Val);
303 // Rewrite preprocessor options, to replace -Wp,-MD,FOO which is used by
304 // some build systems. We don't try to be complete here because we don't
305 // care to encourage this usage model.
306 if (A->getOption().matches(options::OPT_Wp_COMMA) &&
307 (A->getValue(0) == StringRef("-MD") ||
308 A->getValue(0) == StringRef("-MMD"))) {
309 // Rewrite to -MD/-MMD along with -MF.
310 if (A->getValue(0) == StringRef("-MD"))
311 DAL->AddFlagArg(A, Opts->getOption(options::OPT_MD));
313 DAL->AddFlagArg(A, Opts->getOption(options::OPT_MMD));
314 if (A->getNumValues() == 2)
315 DAL->AddSeparateArg(A, Opts->getOption(options::OPT_MF),
320 // Rewrite reserved library names.
321 if (A->getOption().matches(options::OPT_l)) {
322 StringRef Value = A->getValue();
324 // Rewrite unless -nostdlib is present.
325 if (!HasNostdlib && !HasNodefaultlib && Value == "stdc++") {
326 DAL->AddFlagArg(A, Opts->getOption(options::OPT_Z_reserved_lib_stdcxx));
330 // Rewrite unconditionally.
331 if (Value == "cc_kext") {
332 DAL->AddFlagArg(A, Opts->getOption(options::OPT_Z_reserved_lib_cckext));
337 // Pick up inputs via the -- option.
338 if (A->getOption().matches(options::OPT__DASH_DASH)) {
340 for (StringRef Val : A->getValues())
341 DAL->append(MakeInputArg(*DAL, *Opts, Val));
348 // Enforce -static if -miamcu is present.
349 if (Args.hasFlag(options::OPT_miamcu, options::OPT_mno_iamcu, false))
350 DAL->AddFlagArg(0, Opts->getOption(options::OPT_static));
352 // Add a default value of -mlinker-version=, if one was given and the user
353 // didn't specify one.
354 #if defined(HOST_LINK_VERSION)
355 if (!Args.hasArg(options::OPT_mlinker_version_EQ) &&
356 strlen(HOST_LINK_VERSION) > 0) {
357 DAL->AddJoinedArg(0, Opts->getOption(options::OPT_mlinker_version_EQ),
359 DAL->getLastArg(options::OPT_mlinker_version_EQ)->claim();
366 /// \brief Compute target triple from args.
368 /// This routine provides the logic to compute a target triple from various
369 /// args passed to the driver and the default triple string.
370 static llvm::Triple computeTargetTriple(const Driver &D,
371 StringRef DefaultTargetTriple,
373 StringRef DarwinArchName = "") {
374 // FIXME: Already done in Compilation *Driver::BuildCompilation
375 if (const Arg *A = Args.getLastArg(options::OPT_target))
376 DefaultTargetTriple = A->getValue();
378 llvm::Triple Target(llvm::Triple::normalize(DefaultTargetTriple));
380 // Handle Apple-specific options available here.
381 if (Target.isOSBinFormatMachO()) {
382 // If an explict Darwin arch name is given, that trumps all.
383 if (!DarwinArchName.empty()) {
384 tools::darwin::setTripleTypeForMachOArchName(Target, DarwinArchName);
388 // Handle the Darwin '-arch' flag.
389 if (Arg *A = Args.getLastArg(options::OPT_arch)) {
390 StringRef ArchName = A->getValue();
391 tools::darwin::setTripleTypeForMachOArchName(Target, ArchName);
395 // Handle pseudo-target flags '-mlittle-endian'/'-EL' and
396 // '-mbig-endian'/'-EB'.
397 if (Arg *A = Args.getLastArg(options::OPT_mlittle_endian,
398 options::OPT_mbig_endian)) {
399 if (A->getOption().matches(options::OPT_mlittle_endian)) {
400 llvm::Triple LE = Target.getLittleEndianArchVariant();
401 if (LE.getArch() != llvm::Triple::UnknownArch)
402 Target = std::move(LE);
404 llvm::Triple BE = Target.getBigEndianArchVariant();
405 if (BE.getArch() != llvm::Triple::UnknownArch)
406 Target = std::move(BE);
410 // Skip further flag support on OSes which don't support '-m32' or '-m64'.
411 if (Target.getArch() == llvm::Triple::tce ||
412 Target.getOS() == llvm::Triple::Minix)
415 // Handle pseudo-target flags '-m64', '-mx32', '-m32' and '-m16'.
416 Arg *A = Args.getLastArg(options::OPT_m64, options::OPT_mx32,
417 options::OPT_m32, options::OPT_m16);
419 llvm::Triple::ArchType AT = llvm::Triple::UnknownArch;
421 if (A->getOption().matches(options::OPT_m64)) {
422 AT = Target.get64BitArchVariant().getArch();
423 if (Target.getEnvironment() == llvm::Triple::GNUX32)
424 Target.setEnvironment(llvm::Triple::GNU);
425 } else if (A->getOption().matches(options::OPT_mx32) &&
426 Target.get64BitArchVariant().getArch() == llvm::Triple::x86_64) {
427 AT = llvm::Triple::x86_64;
428 Target.setEnvironment(llvm::Triple::GNUX32);
429 } else if (A->getOption().matches(options::OPT_m32)) {
430 AT = Target.get32BitArchVariant().getArch();
431 if (Target.getEnvironment() == llvm::Triple::GNUX32)
432 Target.setEnvironment(llvm::Triple::GNU);
433 } else if (A->getOption().matches(options::OPT_m16) &&
434 Target.get32BitArchVariant().getArch() == llvm::Triple::x86) {
435 AT = llvm::Triple::x86;
436 Target.setEnvironment(llvm::Triple::CODE16);
439 if (AT != llvm::Triple::UnknownArch && AT != Target.getArch())
443 // Handle -miamcu flag.
444 if (Args.hasFlag(options::OPT_miamcu, options::OPT_mno_iamcu, false)) {
445 if (Target.get32BitArchVariant().getArch() != llvm::Triple::x86)
446 D.Diag(diag::err_drv_unsupported_opt_for_target) << "-miamcu"
449 if (A && !A->getOption().matches(options::OPT_m32))
450 D.Diag(diag::err_drv_argument_not_allowed_with)
451 << "-miamcu" << A->getBaseArg().getAsString(Args);
453 Target.setArch(llvm::Triple::x86);
454 Target.setArchName("i586");
455 Target.setEnvironment(llvm::Triple::UnknownEnvironment);
456 Target.setEnvironmentName("");
457 Target.setOS(llvm::Triple::ELFIAMCU);
458 Target.setVendor(llvm::Triple::UnknownVendor);
459 Target.setVendorName("intel");
465 // \brief Parse the LTO options and record the type of LTO compilation
466 // based on which -f(no-)?lto(=.*)? option occurs last.
467 void Driver::setLTOMode(const llvm::opt::ArgList &Args) {
469 if (!Args.hasFlag(options::OPT_flto, options::OPT_flto_EQ,
470 options::OPT_fno_lto, false))
473 StringRef LTOName("full");
475 const Arg *A = Args.getLastArg(options::OPT_flto_EQ);
477 LTOName = A->getValue();
479 LTOMode = llvm::StringSwitch<LTOKind>(LTOName)
480 .Case("full", LTOK_Full)
481 .Case("thin", LTOK_Thin)
482 .Default(LTOK_Unknown);
484 if (LTOMode == LTOK_Unknown) {
486 Diag(diag::err_drv_unsupported_option_argument) << A->getOption().getName()
491 /// Compute the desired OpenMP runtime from the flags provided.
492 Driver::OpenMPRuntimeKind Driver::getOpenMPRuntime(const ArgList &Args) const {
493 StringRef RuntimeName(CLANG_DEFAULT_OPENMP_RUNTIME);
495 const Arg *A = Args.getLastArg(options::OPT_fopenmp_EQ);
497 RuntimeName = A->getValue();
499 auto RT = llvm::StringSwitch<OpenMPRuntimeKind>(RuntimeName)
500 .Case("libomp", OMPRT_OMP)
501 .Case("libgomp", OMPRT_GOMP)
502 .Case("libiomp5", OMPRT_IOMP5)
503 .Default(OMPRT_Unknown);
505 if (RT == OMPRT_Unknown) {
507 Diag(diag::err_drv_unsupported_option_argument)
508 << A->getOption().getName() << A->getValue();
510 // FIXME: We could use a nicer diagnostic here.
511 Diag(diag::err_drv_unsupported_opt) << "-fopenmp";
517 void Driver::CreateOffloadingDeviceToolChains(Compilation &C,
523 // We need to generate a CUDA toolchain if any of the inputs has a CUDA type.
524 if (llvm::any_of(Inputs, [](std::pair<types::ID, const llvm::opt::Arg *> &I) {
525 return types::isCuda(I.first);
527 const ToolChain *HostTC = C.getSingleOffloadToolChain<Action::OFK_Host>();
528 const llvm::Triple &HostTriple = HostTC->getTriple();
529 llvm::Triple CudaTriple(HostTriple.isArch64Bit() ? "nvptx64-nvidia-cuda"
530 : "nvptx-nvidia-cuda");
531 // Use the CUDA and host triples as the key into the ToolChains map, because
532 // the device toolchain we create depends on both.
533 auto &CudaTC = ToolChains[CudaTriple.str() + "/" + HostTriple.str()];
535 CudaTC = llvm::make_unique<toolchains::CudaToolChain>(
536 *this, CudaTriple, *HostTC, C.getInputArgs(), Action::OFK_Cuda);
538 C.addOffloadDeviceToolChain(CudaTC.get(), Action::OFK_Cuda);
544 // We need to generate an OpenMP toolchain if the user specified targets with
545 // the -fopenmp-targets option.
546 if (Arg *OpenMPTargets =
547 C.getInputArgs().getLastArg(options::OPT_fopenmp_targets_EQ)) {
548 if (OpenMPTargets->getNumValues()) {
549 // We expect that -fopenmp-targets is always used in conjunction with the
550 // option -fopenmp specifying a valid runtime with offloading support,
551 // i.e. libomp or libiomp.
552 bool HasValidOpenMPRuntime = C.getInputArgs().hasFlag(
553 options::OPT_fopenmp, options::OPT_fopenmp_EQ,
554 options::OPT_fno_openmp, false);
555 if (HasValidOpenMPRuntime) {
556 OpenMPRuntimeKind OpenMPKind = getOpenMPRuntime(C.getInputArgs());
557 HasValidOpenMPRuntime =
558 OpenMPKind == OMPRT_OMP || OpenMPKind == OMPRT_IOMP5;
561 if (HasValidOpenMPRuntime) {
562 llvm::StringMap<const char *> FoundNormalizedTriples;
563 for (const char *Val : OpenMPTargets->getValues()) {
564 llvm::Triple TT(Val);
565 std::string NormalizedName = TT.normalize();
567 // Make sure we don't have a duplicate triple.
568 auto Duplicate = FoundNormalizedTriples.find(NormalizedName);
569 if (Duplicate != FoundNormalizedTriples.end()) {
570 Diag(clang::diag::warn_drv_omp_offload_target_duplicate)
571 << Val << Duplicate->second;
575 // Store the current triple so that we can check for duplicates in the
576 // following iterations.
577 FoundNormalizedTriples[NormalizedName] = Val;
579 // If the specified target is invalid, emit a diagnostic.
580 if (TT.getArch() == llvm::Triple::UnknownArch)
581 Diag(clang::diag::err_drv_invalid_omp_target) << Val;
584 // CUDA toolchains have to be selected differently. They pair host
585 // and device in their implementation.
587 const ToolChain *HostTC =
588 C.getSingleOffloadToolChain<Action::OFK_Host>();
589 assert(HostTC && "Host toolchain should be always defined.");
591 ToolChains[TT.str() + "/" + HostTC->getTriple().normalize()];
593 CudaTC = llvm::make_unique<toolchains::CudaToolChain>(
594 *this, TT, *HostTC, C.getInputArgs(), Action::OFK_OpenMP);
597 TC = &getToolChain(C.getInputArgs(), TT);
598 C.addOffloadDeviceToolChain(TC, Action::OFK_OpenMP);
602 Diag(clang::diag::err_drv_expecting_fopenmp_with_fopenmp_targets);
604 Diag(clang::diag::warn_drv_empty_joined_argument)
605 << OpenMPTargets->getAsString(C.getInputArgs());
609 // TODO: Add support for other offloading programming models here.
613 /// Looks the given directories for the specified file.
615 /// \param[out] FilePath File path, if the file was found.
616 /// \param[in] Dirs Directories used for the search.
617 /// \param[in] FileName Name of the file to search for.
618 /// \return True if file was found.
620 /// Looks for file specified by FileName sequentially in directories specified
623 static bool searchForFile(SmallVectorImpl<char> &FilePath,
624 ArrayRef<std::string> Dirs,
625 StringRef FileName) {
626 SmallString<128> WPath;
627 for (const StringRef &Dir : Dirs) {
631 llvm::sys::path::append(WPath, Dir, FileName);
632 llvm::sys::path::native(WPath);
633 if (llvm::sys::fs::is_regular_file(WPath)) {
634 FilePath = std::move(WPath);
641 bool Driver::readConfigFile(StringRef FileName) {
642 // Try reading the given file.
643 SmallVector<const char *, 32> NewCfgArgs;
644 if (!llvm::cl::readConfigFile(FileName, Saver, NewCfgArgs)) {
645 Diag(diag::err_drv_cannot_read_config_file) << FileName;
649 // Read options from config file.
650 llvm::SmallString<128> CfgFileName(FileName);
651 llvm::sys::path::native(CfgFileName);
652 ConfigFile = CfgFileName.str();
654 CfgOptions = llvm::make_unique<InputArgList>(
655 ParseArgStrings(NewCfgArgs, ContainErrors));
661 if (CfgOptions->hasArg(options::OPT_config)) {
663 Diag(diag::err_drv_nested_config_file);
667 // Claim all arguments that come from a configuration file so that the driver
668 // does not warn on any that is unused.
669 for (Arg *A : *CfgOptions)
674 bool Driver::loadConfigFile() {
675 std::string CfgFileName;
676 bool FileSpecifiedExplicitly = false;
678 // Process options that change search path for config files.
680 if (CLOptions->hasArg(options::OPT_config_system_dir_EQ)) {
681 SmallString<128> CfgDir;
683 CLOptions->getLastArgValue(options::OPT_config_system_dir_EQ));
684 if (!CfgDir.empty()) {
685 if (llvm::sys::fs::make_absolute(CfgDir).value() != 0)
686 SystemConfigDir.clear();
688 SystemConfigDir = std::string(CfgDir.begin(), CfgDir.end());
691 if (CLOptions->hasArg(options::OPT_config_user_dir_EQ)) {
692 SmallString<128> CfgDir;
694 CLOptions->getLastArgValue(options::OPT_config_user_dir_EQ));
695 if (!CfgDir.empty()) {
696 if (llvm::sys::fs::make_absolute(CfgDir).value() != 0)
697 UserConfigDir.clear();
699 UserConfigDir = std::string(CfgDir.begin(), CfgDir.end());
704 // First try to find config file specified in command line.
706 std::vector<std::string> ConfigFiles =
707 CLOptions->getAllArgValues(options::OPT_config);
708 if (ConfigFiles.size() > 1) {
709 Diag(diag::err_drv_duplicate_config);
713 if (!ConfigFiles.empty()) {
714 CfgFileName = ConfigFiles.front();
715 assert(!CfgFileName.empty());
717 // If argument contains directory separator, treat it as a path to
718 // configuration file.
719 if (llvm::sys::path::has_parent_path(CfgFileName)) {
720 SmallString<128> CfgFilePath;
721 if (llvm::sys::path::is_relative(CfgFileName))
722 llvm::sys::fs::current_path(CfgFilePath);
723 llvm::sys::path::append(CfgFilePath, CfgFileName);
724 if (!llvm::sys::fs::is_regular_file(CfgFilePath)) {
725 Diag(diag::err_drv_config_file_not_exist) << CfgFilePath;
728 return readConfigFile(CfgFilePath);
731 FileSpecifiedExplicitly = true;
735 // If config file is not specified explicitly, try to deduce configuration
736 // from executable name. For instance, an executable 'armv7l-clang' will
737 // search for config file 'armv7l-clang.cfg'.
738 if (CfgFileName.empty() && !ClangNameParts.TargetPrefix.empty())
739 CfgFileName = ClangNameParts.TargetPrefix + '-' + ClangNameParts.ModeSuffix;
741 if (CfgFileName.empty())
744 // Determine architecture part of the file name, if it is present.
745 StringRef CfgFileArch = CfgFileName;
746 size_t ArchPrefixLen = CfgFileArch.find('-');
747 if (ArchPrefixLen == StringRef::npos)
748 ArchPrefixLen = CfgFileArch.size();
749 llvm::Triple CfgTriple;
750 CfgFileArch = CfgFileArch.take_front(ArchPrefixLen);
751 CfgTriple = llvm::Triple(llvm::Triple::normalize(CfgFileArch));
752 if (CfgTriple.getArch() == llvm::Triple::ArchType::UnknownArch)
755 if (!StringRef(CfgFileName).endswith(".cfg"))
756 CfgFileName += ".cfg";
758 // If config file starts with architecture name and command line options
759 // redefine architecture (with options like -m32 -LE etc), try finding new
760 // config file with that architecture.
761 SmallString<128> FixedConfigFile;
762 size_t FixedArchPrefixLen = 0;
764 // Get architecture name from config file name like 'i386.cfg' or
765 // 'armv7l-clang.cfg'.
766 // Check if command line options changes effective triple.
767 llvm::Triple EffectiveTriple = computeTargetTriple(*this,
768 CfgTriple.getTriple(), *CLOptions);
769 if (CfgTriple.getArch() != EffectiveTriple.getArch()) {
770 FixedConfigFile = EffectiveTriple.getArchName();
771 FixedArchPrefixLen = FixedConfigFile.size();
772 // Append the rest of original file name so that file name transforms
773 // like: i386-clang.cfg -> x86_64-clang.cfg.
774 if (ArchPrefixLen < CfgFileName.size())
775 FixedConfigFile += CfgFileName.substr(ArchPrefixLen);
779 // Prepare list of directories where config file is searched for.
780 SmallVector<std::string, 3> CfgFileSearchDirs;
781 CfgFileSearchDirs.push_back(UserConfigDir);
782 CfgFileSearchDirs.push_back(SystemConfigDir);
783 CfgFileSearchDirs.push_back(Dir);
785 // Try to find config file. First try file with corrected architecture.
786 llvm::SmallString<128> CfgFilePath;
787 if (!FixedConfigFile.empty()) {
788 if (searchForFile(CfgFilePath, CfgFileSearchDirs, FixedConfigFile))
789 return readConfigFile(CfgFilePath);
790 // If 'x86_64-clang.cfg' was not found, try 'x86_64.cfg'.
791 FixedConfigFile.resize(FixedArchPrefixLen);
792 FixedConfigFile.append(".cfg");
793 if (searchForFile(CfgFilePath, CfgFileSearchDirs, FixedConfigFile))
794 return readConfigFile(CfgFilePath);
797 // Then try original file name.
798 if (searchForFile(CfgFilePath, CfgFileSearchDirs, CfgFileName))
799 return readConfigFile(CfgFilePath);
801 // Finally try removing driver mode part: 'x86_64-clang.cfg' -> 'x86_64.cfg'.
802 if (!ClangNameParts.ModeSuffix.empty() &&
803 !ClangNameParts.TargetPrefix.empty()) {
804 CfgFileName.assign(ClangNameParts.TargetPrefix);
805 CfgFileName.append(".cfg");
806 if (searchForFile(CfgFilePath, CfgFileSearchDirs, CfgFileName))
807 return readConfigFile(CfgFilePath);
810 // Report error but only if config file was specified explicitly, by option
811 // --config. If it was deduced from executable name, it is not an error.
812 if (FileSpecifiedExplicitly) {
813 Diag(diag::err_drv_config_file_not_found) << CfgFileName;
814 for (const std::string &SearchDir : CfgFileSearchDirs)
815 if (!SearchDir.empty())
816 Diag(diag::note_drv_config_file_searched_in) << SearchDir;
823 Compilation *Driver::BuildCompilation(ArrayRef<const char *> ArgList) {
824 llvm::PrettyStackTraceString CrashInfo("Compilation construction");
826 // FIXME: Handle environment options which affect driver behavior, somewhere
827 // (client?). GCC_EXEC_PREFIX, LPATH, CC_PRINT_OPTIONS.
829 if (Optional<std::string> CompilerPathValue =
830 llvm::sys::Process::GetEnv("COMPILER_PATH")) {
831 StringRef CompilerPath = *CompilerPathValue;
832 while (!CompilerPath.empty()) {
833 std::pair<StringRef, StringRef> Split =
834 CompilerPath.split(llvm::sys::EnvPathSeparator);
835 PrefixDirs.push_back(Split.first);
836 CompilerPath = Split.second;
840 // We look for the driver mode option early, because the mode can affect
841 // how other options are parsed.
842 ParseDriverMode(ClangExecutable, ArgList.slice(1));
844 // FIXME: What are we going to do with -V and -b?
846 // Arguments specified in command line.
848 CLOptions = llvm::make_unique<InputArgList>(
849 ParseArgStrings(ArgList.slice(1), ContainsError));
851 // Try parsing configuration file.
853 ContainsError = loadConfigFile();
854 bool HasConfigFile = !ContainsError && (CfgOptions.get() != nullptr);
856 // All arguments, from both config file and command line.
857 InputArgList Args = std::move(HasConfigFile ? std::move(*CfgOptions)
858 : std::move(*CLOptions));
860 for (auto *Opt : *CLOptions) {
861 const Arg *BaseArg = &Opt->getBaseArg();
864 Arg *Copy = new llvm::opt::Arg(Opt->getOption(), Opt->getSpelling(),
865 Args.size(), BaseArg);
866 Copy->getValues() = Opt->getValues();
867 if (Opt->isClaimed())
872 // FIXME: This stuff needs to go into the Compilation, not the driver.
875 // Silence driver warnings if requested
876 Diags.setIgnoreAllWarnings(Args.hasArg(options::OPT_w));
878 // -no-canonical-prefixes is used very early in main.
879 Args.ClaimAllArgs(options::OPT_no_canonical_prefixes);
882 Args.ClaimAllArgs(options::OPT_pipe);
884 // Extract -ccc args.
886 // FIXME: We need to figure out where this behavior should live. Most of it
887 // should be outside in the client; the parts that aren't should have proper
888 // options, either by introducing new ones or by overloading gcc ones like -V
890 CCCPrintPhases = Args.hasArg(options::OPT_ccc_print_phases);
891 CCCPrintBindings = Args.hasArg(options::OPT_ccc_print_bindings);
892 if (const Arg *A = Args.getLastArg(options::OPT_ccc_gcc_name))
893 CCCGenericGCCName = A->getValue();
895 Args.hasFlag(options::OPT_ccc_pch_is_pch, options::OPT_ccc_pch_is_pth);
896 GenReproducer = Args.hasFlag(options::OPT_gen_reproducer,
897 options::OPT_fno_crash_diagnostics,
898 !!::getenv("FORCE_CLANG_DIAGNOSTICS_CRASH"));
899 // FIXME: DefaultTargetTriple is used by the target-prefixed calls to as/ld
900 // and getToolChain is const.
902 // clang-cl targets MSVC-style Win32.
903 llvm::Triple T(DefaultTargetTriple);
904 T.setOS(llvm::Triple::Win32);
905 T.setVendor(llvm::Triple::PC);
906 T.setEnvironment(llvm::Triple::MSVC);
907 T.setObjectFormat(llvm::Triple::COFF);
908 DefaultTargetTriple = T.str();
910 if (const Arg *A = Args.getLastArg(options::OPT_target))
911 DefaultTargetTriple = A->getValue();
912 if (const Arg *A = Args.getLastArg(options::OPT_ccc_install_dir))
913 Dir = InstalledDir = A->getValue();
914 for (const Arg *A : Args.filtered(options::OPT_B)) {
916 PrefixDirs.push_back(A->getValue(0));
918 if (const Arg *A = Args.getLastArg(options::OPT__sysroot_EQ))
919 SysRoot = A->getValue();
920 if (const Arg *A = Args.getLastArg(options::OPT__dyld_prefix_EQ))
921 DyldPrefix = A->getValue();
923 if (const Arg *A = Args.getLastArg(options::OPT_resource_dir))
924 ResourceDir = A->getValue();
926 if (const Arg *A = Args.getLastArg(options::OPT_save_temps_EQ)) {
927 SaveTemps = llvm::StringSwitch<SaveTempsMode>(A->getValue())
928 .Case("cwd", SaveTempsCwd)
929 .Case("obj", SaveTempsObj)
930 .Default(SaveTempsCwd);
935 // Process -fembed-bitcode= flags.
936 if (Arg *A = Args.getLastArg(options::OPT_fembed_bitcode_EQ)) {
937 StringRef Name = A->getValue();
938 unsigned Model = llvm::StringSwitch<unsigned>(Name)
939 .Case("off", EmbedNone)
940 .Case("all", EmbedBitcode)
941 .Case("bitcode", EmbedBitcode)
942 .Case("marker", EmbedMarker)
945 Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
948 BitcodeEmbed = static_cast<BitcodeEmbedMode>(Model);
951 std::unique_ptr<llvm::opt::InputArgList> UArgs =
952 llvm::make_unique<InputArgList>(std::move(Args));
954 // Perform the default argument translations.
955 DerivedArgList *TranslatedArgs = TranslateInputArgs(*UArgs);
957 // Owned by the host.
958 const ToolChain &TC = getToolChain(
959 *UArgs, computeTargetTriple(*this, DefaultTargetTriple, *UArgs));
961 // The compilation takes ownership of Args.
962 Compilation *C = new Compilation(*this, TC, UArgs.release(), TranslatedArgs,
965 if (!HandleImmediateArgs(*C))
968 // Construct the list of inputs.
970 BuildInputs(C->getDefaultToolChain(), *TranslatedArgs, Inputs);
972 // Populate the tool chains for the offloading devices, if any.
973 CreateOffloadingDeviceToolChains(*C, Inputs);
975 // Construct the list of abstract actions to perform for this compilation. On
976 // MachO targets this uses the driver-driver and universal actions.
977 if (TC.getTriple().isOSBinFormatMachO())
978 BuildUniversalActions(*C, C->getDefaultToolChain(), Inputs);
980 BuildActions(*C, C->getArgs(), Inputs, C->getActions());
982 if (CCCPrintPhases) {
992 static void printArgList(raw_ostream &OS, const llvm::opt::ArgList &Args) {
993 llvm::opt::ArgStringList ASL;
994 for (const auto *A : Args)
995 A->render(Args, ASL);
997 for (auto I = ASL.begin(), E = ASL.end(); I != E; ++I) {
998 if (I != ASL.begin())
1000 Command::printArg(OS, *I, true);
1005 bool Driver::getCrashDiagnosticFile(StringRef ReproCrashFilename,
1006 SmallString<128> &CrashDiagDir) {
1007 using namespace llvm::sys;
1008 assert(llvm::Triple(llvm::sys::getProcessTriple()).isOSDarwin() &&
1009 "Only knows about .crash files on Darwin");
1011 // The .crash file can be found on at ~/Library/Logs/DiagnosticReports/
1012 // (or /Library/Logs/DiagnosticReports for root) and has the filename pattern
1013 // clang-<VERSION>_<YYYY-MM-DD-HHMMSS>_<hostname>.crash.
1014 path::home_directory(CrashDiagDir);
1015 if (CrashDiagDir.startswith("/var/root"))
1017 path::append(CrashDiagDir, "Library/Logs/DiagnosticReports");
1025 fs::file_status FileStatus;
1026 TimePoint<> LastAccessTime;
1027 SmallString<128> CrashFilePath;
1028 // Lookup the .crash files and get the one generated by a subprocess spawned
1029 // by this driver invocation.
1030 for (fs::directory_iterator File(CrashDiagDir, EC), FileEnd;
1031 File != FileEnd && !EC; File.increment(EC)) {
1032 StringRef FileName = path::filename(File->path());
1033 if (!FileName.startswith(Name))
1035 if (fs::status(File->path(), FileStatus))
1037 llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> CrashFile =
1038 llvm::MemoryBuffer::getFile(File->path());
1041 // The first line should start with "Process:", otherwise this isn't a real
1043 StringRef Data = CrashFile.get()->getBuffer();
1044 if (!Data.startswith("Process:"))
1046 // Parse parent process pid line, e.g: "Parent Process: clang-4.0 [79141]"
1047 size_t ParentProcPos = Data.find("Parent Process:");
1048 if (ParentProcPos == StringRef::npos)
1050 size_t LineEnd = Data.find_first_of("\n", ParentProcPos);
1051 if (LineEnd == StringRef::npos)
1053 StringRef ParentProcess = Data.slice(ParentProcPos+15, LineEnd).trim();
1054 int OpenBracket = -1, CloseBracket = -1;
1055 for (size_t i = 0, e = ParentProcess.size(); i < e; ++i) {
1056 if (ParentProcess[i] == '[')
1058 if (ParentProcess[i] == ']')
1061 // Extract the parent process PID from the .crash file and check whether
1062 // it matches this driver invocation pid.
1064 if (OpenBracket < 0 || CloseBracket < 0 ||
1065 ParentProcess.slice(OpenBracket + 1, CloseBracket)
1066 .getAsInteger(10, CrashPID) || CrashPID != PID) {
1070 // Found a .crash file matching the driver pid. To avoid getting an older
1071 // and misleading crash file, continue looking for the most recent.
1072 // FIXME: the driver can dispatch multiple cc1 invocations, leading to
1073 // multiple crashes poiting to the same parent process. Since the driver
1074 // does not collect pid information for the dispatched invocation there's
1075 // currently no way to distinguish among them.
1076 const auto FileAccessTime = FileStatus.getLastModificationTime();
1077 if (FileAccessTime > LastAccessTime) {
1078 CrashFilePath.assign(File->path());
1079 LastAccessTime = FileAccessTime;
1083 // If found, copy it over to the location of other reproducer files.
1084 if (!CrashFilePath.empty()) {
1085 EC = fs::copy_file(CrashFilePath, ReproCrashFilename);
1094 // When clang crashes, produce diagnostic information including the fully
1095 // preprocessed source file(s). Request that the developer attach the
1096 // diagnostic information to a bug report.
1097 void Driver::generateCompilationDiagnostics(Compilation &C,
1098 const Command &FailingCommand) {
1099 if (C.getArgs().hasArg(options::OPT_fno_crash_diagnostics))
1102 // Don't try to generate diagnostics for link or dsymutil jobs.
1103 if (FailingCommand.getCreator().isLinkJob() ||
1104 FailingCommand.getCreator().isDsymutilJob())
1107 // Print the version of the compiler.
1108 PrintVersion(C, llvm::errs());
1110 Diag(clang::diag::note_drv_command_failed_diag_msg)
1111 << "PLEASE submit a bug report to " BUG_REPORT_URL " and include the "
1112 "crash backtrace, preprocessed source, and associated run script.";
1114 // Suppress driver output and emit preprocessor output to temp file.
1116 CCGenDiagnostics = true;
1118 // Save the original job command(s).
1119 Command Cmd = FailingCommand;
1121 // Keep track of whether we produce any errors while trying to produce
1122 // preprocessed sources.
1123 DiagnosticErrorTrap Trap(Diags);
1125 // Suppress tool output.
1126 C.initCompilationForDiagnostics();
1128 // Construct the list of inputs.
1130 BuildInputs(C.getDefaultToolChain(), C.getArgs(), Inputs);
1132 for (InputList::iterator it = Inputs.begin(), ie = Inputs.end(); it != ie;) {
1133 bool IgnoreInput = false;
1135 // Ignore input from stdin or any inputs that cannot be preprocessed.
1136 // Check type first as not all linker inputs have a value.
1137 if (types::getPreprocessedType(it->first) == types::TY_INVALID) {
1139 } else if (!strcmp(it->second->getValue(), "-")) {
1140 Diag(clang::diag::note_drv_command_failed_diag_msg)
1141 << "Error generating preprocessed source(s) - "
1142 "ignoring input from stdin.";
1147 it = Inputs.erase(it);
1154 if (Inputs.empty()) {
1155 Diag(clang::diag::note_drv_command_failed_diag_msg)
1156 << "Error generating preprocessed source(s) - "
1157 "no preprocessable inputs.";
1161 // Don't attempt to generate preprocessed files if multiple -arch options are
1162 // used, unless they're all duplicates.
1163 llvm::StringSet<> ArchNames;
1164 for (const Arg *A : C.getArgs()) {
1165 if (A->getOption().matches(options::OPT_arch)) {
1166 StringRef ArchName = A->getValue();
1167 ArchNames.insert(ArchName);
1170 if (ArchNames.size() > 1) {
1171 Diag(clang::diag::note_drv_command_failed_diag_msg)
1172 << "Error generating preprocessed source(s) - cannot generate "
1173 "preprocessed source with multiple -arch options.";
1177 // Construct the list of abstract actions to perform for this compilation. On
1178 // Darwin OSes this uses the driver-driver and builds universal actions.
1179 const ToolChain &TC = C.getDefaultToolChain();
1180 if (TC.getTriple().isOSBinFormatMachO())
1181 BuildUniversalActions(C, TC, Inputs);
1183 BuildActions(C, C.getArgs(), Inputs, C.getActions());
1187 // If there were errors building the compilation, quit now.
1188 if (Trap.hasErrorOccurred()) {
1189 Diag(clang::diag::note_drv_command_failed_diag_msg)
1190 << "Error generating preprocessed source(s).";
1194 // Generate preprocessed output.
1195 SmallVector<std::pair<int, const Command *>, 4> FailingCommands;
1196 C.ExecuteJobs(C.getJobs(), FailingCommands);
1198 // If any of the preprocessing commands failed, clean up and exit.
1199 if (!FailingCommands.empty()) {
1200 if (!isSaveTempsEnabled())
1201 C.CleanupFileList(C.getTempFiles(), true);
1203 Diag(clang::diag::note_drv_command_failed_diag_msg)
1204 << "Error generating preprocessed source(s).";
1208 const ArgStringList &TempFiles = C.getTempFiles();
1209 if (TempFiles.empty()) {
1210 Diag(clang::diag::note_drv_command_failed_diag_msg)
1211 << "Error generating preprocessed source(s).";
1215 Diag(clang::diag::note_drv_command_failed_diag_msg)
1216 << "\n********************\n\n"
1217 "PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:\n"
1218 "Preprocessed source(s) and associated run script(s) are located at:";
1220 SmallString<128> VFS;
1221 SmallString<128> ReproCrashFilename;
1222 for (const char *TempFile : TempFiles) {
1223 Diag(clang::diag::note_drv_command_failed_diag_msg) << TempFile;
1224 if (ReproCrashFilename.empty()) {
1225 ReproCrashFilename = TempFile;
1226 llvm::sys::path::replace_extension(ReproCrashFilename, ".crash");
1228 if (StringRef(TempFile).endswith(".cache")) {
1229 // In some cases (modules) we'll dump extra data to help with reproducing
1230 // the crash into a directory next to the output.
1231 VFS = llvm::sys::path::filename(TempFile);
1232 llvm::sys::path::append(VFS, "vfs", "vfs.yaml");
1236 // Assume associated files are based off of the first temporary file.
1237 CrashReportInfo CrashInfo(TempFiles[0], VFS);
1239 std::string Script = CrashInfo.Filename.rsplit('.').first.str() + ".sh";
1241 llvm::raw_fd_ostream ScriptOS(Script, EC, llvm::sys::fs::F_Excl);
1243 Diag(clang::diag::note_drv_command_failed_diag_msg)
1244 << "Error generating run script: " + Script + " " + EC.message();
1246 ScriptOS << "# Crash reproducer for " << getClangFullVersion() << "\n"
1247 << "# Driver args: ";
1248 printArgList(ScriptOS, C.getInputArgs());
1249 ScriptOS << "# Original command: ";
1250 Cmd.Print(ScriptOS, "\n", /*Quote=*/true);
1251 Cmd.Print(ScriptOS, "\n", /*Quote=*/true, &CrashInfo);
1252 Diag(clang::diag::note_drv_command_failed_diag_msg) << Script;
1255 // On darwin, provide information about the .crash diagnostic report.
1256 if (llvm::Triple(llvm::sys::getProcessTriple()).isOSDarwin()) {
1257 SmallString<128> CrashDiagDir;
1258 if (getCrashDiagnosticFile(ReproCrashFilename, CrashDiagDir)) {
1259 Diag(clang::diag::note_drv_command_failed_diag_msg)
1260 << ReproCrashFilename.str();
1261 } else { // Suggest a directory for the user to look for .crash files.
1262 llvm::sys::path::append(CrashDiagDir, Name);
1263 CrashDiagDir += "_<YYYY-MM-DD-HHMMSS>_<hostname>.crash";
1264 Diag(clang::diag::note_drv_command_failed_diag_msg)
1265 << "Crash backtrace is located in";
1266 Diag(clang::diag::note_drv_command_failed_diag_msg)
1267 << CrashDiagDir.str();
1268 Diag(clang::diag::note_drv_command_failed_diag_msg)
1269 << "(choose the .crash file that corresponds to your crash)";
1273 for (const auto &A : C.getArgs().filtered(options::OPT_frewrite_map_file,
1274 options::OPT_frewrite_map_file_EQ))
1275 Diag(clang::diag::note_drv_command_failed_diag_msg) << A->getValue();
1277 Diag(clang::diag::note_drv_command_failed_diag_msg)
1278 << "\n\n********************";
1281 void Driver::setUpResponseFiles(Compilation &C, Command &Cmd) {
1282 // Since commandLineFitsWithinSystemLimits() may underestimate system's capacity
1283 // if the tool does not support response files, there is a chance/ that things
1284 // will just work without a response file, so we silently just skip it.
1285 if (Cmd.getCreator().getResponseFilesSupport() == Tool::RF_None ||
1286 llvm::sys::commandLineFitsWithinSystemLimits(Cmd.getExecutable(), Cmd.getArguments()))
1289 std::string TmpName = GetTemporaryPath("response", "txt");
1290 Cmd.setResponseFile(C.addTempFile(C.getArgs().MakeArgString(TmpName)));
1293 int Driver::ExecuteCompilation(
1295 SmallVectorImpl<std::pair<int, const Command *>> &FailingCommands) {
1296 // Just print if -### was present.
1297 if (C.getArgs().hasArg(options::OPT__HASH_HASH_HASH)) {
1298 C.getJobs().Print(llvm::errs(), "\n", true);
1302 // If there were errors building the compilation, quit now.
1303 if (Diags.hasErrorOccurred())
1306 // Set up response file names for each command, if necessary
1307 for (auto &Job : C.getJobs())
1308 setUpResponseFiles(C, Job);
1310 C.ExecuteJobs(C.getJobs(), FailingCommands);
1312 // Remove temp files.
1313 C.CleanupFileList(C.getTempFiles());
1315 // If the command succeeded, we are done.
1316 if (FailingCommands.empty())
1319 // Otherwise, remove result files and print extra information about abnormal
1321 for (const auto &CmdPair : FailingCommands) {
1322 int Res = CmdPair.first;
1323 const Command *FailingCommand = CmdPair.second;
1325 // Remove result files if we're not saving temps.
1326 if (!isSaveTempsEnabled()) {
1327 const JobAction *JA = cast<JobAction>(&FailingCommand->getSource());
1328 C.CleanupFileMap(C.getResultFiles(), JA, true);
1330 // Failure result files are valid unless we crashed.
1332 C.CleanupFileMap(C.getFailureResultFiles(), JA, true);
1335 // Print extra information about abnormal failures, if possible.
1337 // This is ad-hoc, but we don't want to be excessively noisy. If the result
1338 // status was 1, assume the command failed normally. In particular, if it
1339 // was the compiler then assume it gave a reasonable error code. Failures
1340 // in other tools are less common, and they generally have worse
1341 // diagnostics, so always print the diagnostic there.
1342 const Tool &FailingTool = FailingCommand->getCreator();
1344 if (!FailingCommand->getCreator().hasGoodDiagnostics() || Res != 1) {
1345 // FIXME: See FIXME above regarding result code interpretation.
1347 Diag(clang::diag::err_drv_command_signalled)
1348 << FailingTool.getShortName();
1350 Diag(clang::diag::err_drv_command_failed) << FailingTool.getShortName()
1357 void Driver::PrintHelp(bool ShowHidden) const {
1358 unsigned IncludedFlagsBitmask;
1359 unsigned ExcludedFlagsBitmask;
1360 std::tie(IncludedFlagsBitmask, ExcludedFlagsBitmask) =
1361 getIncludeExcludeOptionFlagMasks();
1363 ExcludedFlagsBitmask |= options::NoDriverOption;
1365 ExcludedFlagsBitmask |= HelpHidden;
1367 getOpts().PrintHelp(llvm::outs(), Name.c_str(), DriverTitle.c_str(),
1368 IncludedFlagsBitmask, ExcludedFlagsBitmask,
1369 /*ShowAllAliases=*/false);
1372 void Driver::PrintVersion(const Compilation &C, raw_ostream &OS) const {
1373 // FIXME: The following handlers should use a callback mechanism, we don't
1374 // know what the client would like to do.
1375 OS << getClangFullVersion() << '\n';
1376 const ToolChain &TC = C.getDefaultToolChain();
1377 OS << "Target: " << TC.getTripleString() << '\n';
1379 // Print the threading model.
1380 if (Arg *A = C.getArgs().getLastArg(options::OPT_mthread_model)) {
1381 // Don't print if the ToolChain would have barfed on it already
1382 if (TC.isThreadModelSupported(A->getValue()))
1383 OS << "Thread model: " << A->getValue();
1385 OS << "Thread model: " << TC.getThreadModel();
1388 // Print out the install directory.
1389 OS << "InstalledDir: " << InstalledDir << '\n';
1391 // If configuration file was used, print its path.
1392 if (!ConfigFile.empty())
1393 OS << "Configuration file: " << ConfigFile << '\n';
1396 /// PrintDiagnosticCategories - Implement the --print-diagnostic-categories
1398 static void PrintDiagnosticCategories(raw_ostream &OS) {
1399 // Skip the empty category.
1400 for (unsigned i = 1, max = DiagnosticIDs::getNumberOfCategories(); i != max;
1402 OS << i << ',' << DiagnosticIDs::getCategoryNameFromID(i) << '\n';
1405 void Driver::handleAutocompletions(StringRef PassedFlags) const {
1406 // Print out all options that start with a given argument. This is used for
1407 // shell autocompletion.
1408 std::vector<std::string> SuggestedCompletions;
1410 unsigned short DisableFlags =
1411 options::NoDriverOption | options::Unsupported | options::Ignored;
1412 // We want to show cc1-only options only when clang is invoked as "clang
1413 // -cc1". When clang is invoked as "clang -cc1", we add "#" to the beginning
1414 // of an --autocomplete option so that the clang driver can distinguish
1415 // whether it is requested to show cc1-only options or not.
1416 if (PassedFlags.size() > 0 && PassedFlags[0] == '#') {
1417 DisableFlags &= ~options::NoDriverOption;
1418 PassedFlags = PassedFlags.substr(1);
1421 if (PassedFlags.find(',') == StringRef::npos) {
1422 // If the flag is in the form of "--autocomplete=-foo",
1423 // we were requested to print out all option names that start with "-foo".
1424 // For example, "--autocomplete=-fsyn" is expanded to "-fsyntax-only".
1425 SuggestedCompletions = Opts->findByPrefix(PassedFlags, DisableFlags);
1427 // We have to query the -W flags manually as they're not in the OptTable.
1428 // TODO: Find a good way to add them to OptTable instead and them remove
1430 for (StringRef S : DiagnosticIDs::getDiagnosticFlags())
1431 if (S.startswith(PassedFlags))
1432 SuggestedCompletions.push_back(S);
1434 // If the flag is in the form of "--autocomplete=foo,bar", we were
1435 // requested to print out all option values for "-foo" that start with
1436 // "bar". For example,
1437 // "--autocomplete=-stdlib=,l" is expanded to "libc++" and "libstdc++".
1438 StringRef Option, Arg;
1439 std::tie(Option, Arg) = PassedFlags.split(',');
1440 SuggestedCompletions = Opts->suggestValueCompletions(Option, Arg);
1443 // Sort the autocomplete candidates so that shells print them out in a
1444 // deterministic order. We could sort in any way, but we chose
1445 // case-insensitive sorting for consistency with the -help option
1446 // which prints out options in the case-insensitive alphabetical order.
1447 std::sort(SuggestedCompletions.begin(), SuggestedCompletions.end(),
1448 [](StringRef A, StringRef B) {
1449 if (int X = A.compare_lower(B))
1451 return A.compare(B) > 0;
1454 llvm::outs() << llvm::join(SuggestedCompletions, "\n") << '\n';
1457 bool Driver::HandleImmediateArgs(const Compilation &C) {
1458 // The order these options are handled in gcc is all over the place, but we
1459 // don't expect inconsistencies w.r.t. that to matter in practice.
1461 if (C.getArgs().hasArg(options::OPT_dumpmachine)) {
1462 llvm::outs() << C.getDefaultToolChain().getTripleString() << '\n';
1466 if (C.getArgs().hasArg(options::OPT_dumpversion)) {
1467 // Since -dumpversion is only implemented for pedantic GCC compatibility, we
1468 // return an answer which matches our definition of __VERSION__.
1470 // If we want to return a more correct answer some day, then we should
1471 // introduce a non-pedantically GCC compatible mode to Clang in which we
1472 // provide sensible definitions for -dumpversion, __VERSION__, etc.
1473 llvm::outs() << "4.2.1\n";
1477 if (C.getArgs().hasArg(options::OPT__print_diagnostic_categories)) {
1478 PrintDiagnosticCategories(llvm::outs());
1482 if (C.getArgs().hasArg(options::OPT_help) ||
1483 C.getArgs().hasArg(options::OPT__help_hidden)) {
1484 PrintHelp(C.getArgs().hasArg(options::OPT__help_hidden));
1488 if (C.getArgs().hasArg(options::OPT__version)) {
1489 // Follow gcc behavior and use stdout for --version and stderr for -v.
1490 PrintVersion(C, llvm::outs());
1494 if (C.getArgs().hasArg(options::OPT_v) ||
1495 C.getArgs().hasArg(options::OPT__HASH_HASH_HASH)) {
1496 PrintVersion(C, llvm::errs());
1497 SuppressMissingInputWarning = true;
1500 if (C.getArgs().hasArg(options::OPT_v)) {
1501 if (!SystemConfigDir.empty())
1502 llvm::errs() << "System configuration file directory: "
1503 << SystemConfigDir << "\n";
1504 if (!UserConfigDir.empty())
1505 llvm::errs() << "User configuration file directory: "
1506 << UserConfigDir << "\n";
1509 const ToolChain &TC = C.getDefaultToolChain();
1511 if (C.getArgs().hasArg(options::OPT_v))
1512 TC.printVerboseInfo(llvm::errs());
1514 if (C.getArgs().hasArg(options::OPT_print_resource_dir)) {
1515 llvm::outs() << ResourceDir << '\n';
1519 if (C.getArgs().hasArg(options::OPT_print_search_dirs)) {
1520 llvm::outs() << "programs: =";
1521 bool separator = false;
1522 for (const std::string &Path : TC.getProgramPaths()) {
1524 llvm::outs() << ':';
1525 llvm::outs() << Path;
1528 llvm::outs() << "\n";
1529 llvm::outs() << "libraries: =" << ResourceDir;
1531 StringRef sysroot = C.getSysRoot();
1533 for (const std::string &Path : TC.getFilePaths()) {
1534 // Always print a separator. ResourceDir was the first item shown.
1535 llvm::outs() << ':';
1536 // Interpretation of leading '=' is needed only for NetBSD.
1538 llvm::outs() << sysroot << Path.substr(1);
1540 llvm::outs() << Path;
1542 llvm::outs() << "\n";
1546 // FIXME: The following handlers should use a callback mechanism, we don't
1547 // know what the client would like to do.
1548 if (Arg *A = C.getArgs().getLastArg(options::OPT_print_file_name_EQ)) {
1549 llvm::outs() << GetFilePath(A->getValue(), TC) << "\n";
1553 if (Arg *A = C.getArgs().getLastArg(options::OPT_print_prog_name_EQ)) {
1554 llvm::outs() << GetProgramPath(A->getValue(), TC) << "\n";
1558 if (Arg *A = C.getArgs().getLastArg(options::OPT_autocomplete)) {
1559 StringRef PassedFlags = A->getValue();
1560 handleAutocompletions(PassedFlags);
1564 if (C.getArgs().hasArg(options::OPT_print_libgcc_file_name)) {
1565 ToolChain::RuntimeLibType RLT = TC.GetRuntimeLibType(C.getArgs());
1566 const llvm::Triple Triple(TC.ComputeEffectiveClangTriple(C.getArgs()));
1567 RegisterEffectiveTriple TripleRAII(TC, Triple);
1569 case ToolChain::RLT_CompilerRT:
1570 llvm::outs() << TC.getCompilerRT(C.getArgs(), "builtins") << "\n";
1572 case ToolChain::RLT_Libgcc:
1573 llvm::outs() << GetFilePath("libgcc.a", TC) << "\n";
1579 if (C.getArgs().hasArg(options::OPT_print_multi_lib)) {
1580 for (const Multilib &Multilib : TC.getMultilibs())
1581 llvm::outs() << Multilib << "\n";
1585 if (C.getArgs().hasArg(options::OPT_print_multi_directory)) {
1586 for (const Multilib &Multilib : TC.getMultilibs()) {
1587 if (Multilib.gccSuffix().empty())
1588 llvm::outs() << ".\n";
1590 StringRef Suffix(Multilib.gccSuffix());
1591 assert(Suffix.front() == '/');
1592 llvm::outs() << Suffix.substr(1) << "\n";
1600 // Display an action graph human-readably. Action A is the "sink" node
1601 // and latest-occuring action. Traversal is in pre-order, visiting the
1602 // inputs to each action before printing the action itself.
1603 static unsigned PrintActions1(const Compilation &C, Action *A,
1604 std::map<Action *, unsigned> &Ids) {
1605 if (Ids.count(A)) // A was already visited.
1609 llvm::raw_string_ostream os(str);
1611 os << Action::getClassName(A->getKind()) << ", ";
1612 if (InputAction *IA = dyn_cast<InputAction>(A)) {
1613 os << "\"" << IA->getInputArg().getValue() << "\"";
1614 } else if (BindArchAction *BIA = dyn_cast<BindArchAction>(A)) {
1615 os << '"' << BIA->getArchName() << '"' << ", {"
1616 << PrintActions1(C, *BIA->input_begin(), Ids) << "}";
1617 } else if (OffloadAction *OA = dyn_cast<OffloadAction>(A)) {
1618 bool IsFirst = true;
1619 OA->doOnEachDependence(
1620 [&](Action *A, const ToolChain *TC, const char *BoundArch) {
1621 // E.g. for two CUDA device dependences whose bound arch is sm_20 and
1622 // sm_35 this will generate:
1623 // "cuda-device" (nvptx64-nvidia-cuda:sm_20) {#ID}, "cuda-device"
1624 // (nvptx64-nvidia-cuda:sm_35) {#ID}
1629 os << A->getOffloadingKindPrefix();
1633 os << TC->getTriple().normalize();
1636 os << ":" << BoundArch;
1639 os << " {" << PrintActions1(C, A, Ids) << "}";
1643 const ActionList *AL = &A->getInputs();
1646 const char *Prefix = "{";
1647 for (Action *PreRequisite : *AL) {
1648 os << Prefix << PrintActions1(C, PreRequisite, Ids);
1656 // Append offload info for all options other than the offloading action
1657 // itself (e.g. (cuda-device, sm_20) or (cuda-host)).
1658 std::string offload_str;
1659 llvm::raw_string_ostream offload_os(offload_str);
1660 if (!isa<OffloadAction>(A)) {
1661 auto S = A->getOffloadingKindPrefix();
1663 offload_os << ", (" << S;
1664 if (A->getOffloadingArch())
1665 offload_os << ", " << A->getOffloadingArch();
1670 unsigned Id = Ids.size();
1672 llvm::errs() << Id << ": " << os.str() << ", "
1673 << types::getTypeName(A->getType()) << offload_os.str() << "\n";
1678 // Print the action graphs in a compilation C.
1679 // For example "clang -c file1.c file2.c" is composed of two subgraphs.
1680 void Driver::PrintActions(const Compilation &C) const {
1681 std::map<Action *, unsigned> Ids;
1682 for (Action *A : C.getActions())
1683 PrintActions1(C, A, Ids);
1686 /// \brief Check whether the given input tree contains any compilation or
1687 /// assembly actions.
1688 static bool ContainsCompileOrAssembleAction(const Action *A) {
1689 if (isa<CompileJobAction>(A) || isa<BackendJobAction>(A) ||
1690 isa<AssembleJobAction>(A))
1693 for (const Action *Input : A->inputs())
1694 if (ContainsCompileOrAssembleAction(Input))
1700 void Driver::BuildUniversalActions(Compilation &C, const ToolChain &TC,
1701 const InputList &BAInputs) const {
1702 DerivedArgList &Args = C.getArgs();
1703 ActionList &Actions = C.getActions();
1704 llvm::PrettyStackTraceString CrashInfo("Building universal build actions");
1705 // Collect the list of architectures. Duplicates are allowed, but should only
1706 // be handled once (in the order seen).
1707 llvm::StringSet<> ArchNames;
1708 SmallVector<const char *, 4> Archs;
1709 for (Arg *A : Args) {
1710 if (A->getOption().matches(options::OPT_arch)) {
1711 // Validate the option here; we don't save the type here because its
1712 // particular spelling may participate in other driver choices.
1713 llvm::Triple::ArchType Arch =
1714 tools::darwin::getArchTypeForMachOArchName(A->getValue());
1715 if (Arch == llvm::Triple::UnknownArch) {
1716 Diag(clang::diag::err_drv_invalid_arch_name) << A->getAsString(Args);
1721 if (ArchNames.insert(A->getValue()).second)
1722 Archs.push_back(A->getValue());
1726 // When there is no explicit arch for this platform, make sure we still bind
1727 // the architecture (to the default) so that -Xarch_ is handled correctly.
1729 Archs.push_back(Args.MakeArgString(TC.getDefaultUniversalArchName()));
1731 ActionList SingleActions;
1732 BuildActions(C, Args, BAInputs, SingleActions);
1734 // Add in arch bindings for every top level action, as well as lipo and
1735 // dsymutil steps if needed.
1736 for (Action* Act : SingleActions) {
1737 // Make sure we can lipo this kind of output. If not (and it is an actual
1738 // output) then we disallow, since we can't create an output file with the
1739 // right name without overwriting it. We could remove this oddity by just
1740 // changing the output names to include the arch, which would also fix
1741 // -save-temps. Compatibility wins for now.
1743 if (Archs.size() > 1 && !types::canLipoType(Act->getType()))
1744 Diag(clang::diag::err_drv_invalid_output_with_multiple_archs)
1745 << types::getTypeName(Act->getType());
1748 for (unsigned i = 0, e = Archs.size(); i != e; ++i)
1749 Inputs.push_back(C.MakeAction<BindArchAction>(Act, Archs[i]));
1751 // Lipo if necessary, we do it this way because we need to set the arch flag
1752 // so that -Xarch_ gets overwritten.
1753 if (Inputs.size() == 1 || Act->getType() == types::TY_Nothing)
1754 Actions.append(Inputs.begin(), Inputs.end());
1756 Actions.push_back(C.MakeAction<LipoJobAction>(Inputs, Act->getType()));
1758 // Handle debug info queries.
1759 Arg *A = Args.getLastArg(options::OPT_g_Group);
1760 if (A && !A->getOption().matches(options::OPT_g0) &&
1761 !A->getOption().matches(options::OPT_gstabs) &&
1762 ContainsCompileOrAssembleAction(Actions.back())) {
1764 // Add a 'dsymutil' step if necessary, when debug info is enabled and we
1765 // have a compile input. We need to run 'dsymutil' ourselves in such cases
1766 // because the debug info will refer to a temporary object file which
1767 // will be removed at the end of the compilation process.
1768 if (Act->getType() == types::TY_Image) {
1770 Inputs.push_back(Actions.back());
1773 C.MakeAction<DsymutilJobAction>(Inputs, types::TY_dSYM));
1776 // Verify the debug info output.
1777 if (Args.hasArg(options::OPT_verify_debug_info)) {
1778 Action* LastAction = Actions.back();
1780 Actions.push_back(C.MakeAction<VerifyDebugInfoJobAction>(
1781 LastAction, types::TY_Nothing));
1787 /// \brief Check that the file referenced by Value exists. If it doesn't,
1788 /// issue a diagnostic and return false.
1789 static bool DiagnoseInputExistence(const Driver &D, const DerivedArgList &Args,
1790 StringRef Value, types::ID Ty) {
1791 if (!D.getCheckInputsExist())
1794 // stdin always exists.
1798 SmallString<64> Path(Value);
1799 if (Arg *WorkDir = Args.getLastArg(options::OPT_working_directory)) {
1800 if (!llvm::sys::path::is_absolute(Path)) {
1801 SmallString<64> Directory(WorkDir->getValue());
1802 llvm::sys::path::append(Directory, Value);
1803 Path.assign(Directory);
1807 if (llvm::sys::fs::exists(Twine(Path)))
1811 if (!llvm::sys::path::is_absolute(Twine(Path)) &&
1812 llvm::sys::Process::FindInEnvPath("LIB", Value))
1815 if (Args.hasArg(options::OPT__SLASH_link) && Ty == types::TY_Object) {
1816 // Arguments to the /link flag might cause the linker to search for object
1817 // and library files in paths we don't know about. Don't error in such
1823 D.Diag(clang::diag::err_drv_no_such_file) << Path;
1827 // Construct a the list of inputs and their types.
1828 void Driver::BuildInputs(const ToolChain &TC, DerivedArgList &Args,
1829 InputList &Inputs) const {
1830 // Track the current user specified (-x) input. We also explicitly track the
1831 // argument used to set the type; we only want to claim the type when we
1832 // actually use it, so we warn about unused -x arguments.
1833 types::ID InputType = types::TY_Nothing;
1834 Arg *InputTypeArg = nullptr;
1836 // The last /TC or /TP option sets the input type to C or C++ globally.
1837 if (Arg *TCTP = Args.getLastArgNoClaim(options::OPT__SLASH_TC,
1838 options::OPT__SLASH_TP)) {
1839 InputTypeArg = TCTP;
1840 InputType = TCTP->getOption().matches(options::OPT__SLASH_TC)
1844 Arg *Previous = nullptr;
1845 bool ShowNote = false;
1846 for (Arg *A : Args.filtered(options::OPT__SLASH_TC, options::OPT__SLASH_TP)) {
1848 Diag(clang::diag::warn_drv_overriding_flag_option)
1849 << Previous->getSpelling() << A->getSpelling();
1855 Diag(clang::diag::note_drv_t_option_is_global);
1857 // No driver mode exposes -x and /TC or /TP; we don't support mixing them.
1858 assert(!Args.hasArg(options::OPT_x) && "-x and /TC or /TP is not allowed");
1861 for (Arg *A : Args) {
1862 if (A->getOption().getKind() == Option::InputClass) {
1863 const char *Value = A->getValue();
1864 types::ID Ty = types::TY_INVALID;
1866 // Infer the input type if necessary.
1867 if (InputType == types::TY_Nothing) {
1868 // If there was an explicit arg for this, claim it.
1870 InputTypeArg->claim();
1872 // stdin must be handled specially.
1873 if (memcmp(Value, "-", 2) == 0) {
1874 // If running with -E, treat as a C input (this changes the builtin
1875 // macros, for example). This may be overridden by -ObjC below.
1877 // Otherwise emit an error but still use a valid type to avoid
1878 // spurious errors (e.g., no inputs).
1879 if (!Args.hasArgNoClaim(options::OPT_E) && !CCCIsCPP())
1880 Diag(IsCLMode() ? clang::diag::err_drv_unknown_stdin_type_clang_cl
1881 : clang::diag::err_drv_unknown_stdin_type);
1884 // Otherwise lookup by extension.
1885 // Fallback is C if invoked as C preprocessor or Object otherwise.
1886 // We use a host hook here because Darwin at least has its own
1887 // idea of what .s is.
1888 if (const char *Ext = strrchr(Value, '.'))
1889 Ty = TC.LookupTypeForExtension(Ext + 1);
1891 if (Ty == types::TY_INVALID) {
1895 Ty = types::TY_Object;
1898 // If the driver is invoked as C++ compiler (like clang++ or c++) it
1899 // should autodetect some input files as C++ for g++ compatibility.
1901 types::ID OldTy = Ty;
1902 Ty = types::lookupCXXTypeForCType(Ty);
1905 Diag(clang::diag::warn_drv_treating_input_as_cxx)
1906 << getTypeName(OldTy) << getTypeName(Ty);
1910 // -ObjC and -ObjC++ override the default language, but only for "source
1911 // files". We just treat everything that isn't a linker input as a
1914 // FIXME: Clean this up if we move the phase sequence into the type.
1915 if (Ty != types::TY_Object) {
1916 if (Args.hasArg(options::OPT_ObjC))
1917 Ty = types::TY_ObjC;
1918 else if (Args.hasArg(options::OPT_ObjCXX))
1919 Ty = types::TY_ObjCXX;
1922 assert(InputTypeArg && "InputType set w/o InputTypeArg");
1923 if (!InputTypeArg->getOption().matches(options::OPT_x)) {
1924 // If emulating cl.exe, make sure that /TC and /TP don't affect input
1926 const char *Ext = strrchr(Value, '.');
1927 if (Ext && TC.LookupTypeForExtension(Ext + 1) == types::TY_Object)
1928 Ty = types::TY_Object;
1930 if (Ty == types::TY_INVALID) {
1932 InputTypeArg->claim();
1936 if (DiagnoseInputExistence(*this, Args, Value, Ty))
1937 Inputs.push_back(std::make_pair(Ty, A));
1939 } else if (A->getOption().matches(options::OPT__SLASH_Tc)) {
1940 StringRef Value = A->getValue();
1941 if (DiagnoseInputExistence(*this, Args, Value, types::TY_C)) {
1942 Arg *InputArg = MakeInputArg(Args, *Opts, A->getValue());
1943 Inputs.push_back(std::make_pair(types::TY_C, InputArg));
1946 } else if (A->getOption().matches(options::OPT__SLASH_Tp)) {
1947 StringRef Value = A->getValue();
1948 if (DiagnoseInputExistence(*this, Args, Value, types::TY_CXX)) {
1949 Arg *InputArg = MakeInputArg(Args, *Opts, A->getValue());
1950 Inputs.push_back(std::make_pair(types::TY_CXX, InputArg));
1953 } else if (A->getOption().hasFlag(options::LinkerInput)) {
1954 // Just treat as object type, we could make a special type for this if
1956 Inputs.push_back(std::make_pair(types::TY_Object, A));
1958 } else if (A->getOption().matches(options::OPT_x)) {
1960 InputType = types::lookupTypeForTypeSpecifier(A->getValue());
1963 // Follow gcc behavior and treat as linker input for invalid -x
1964 // options. Its not clear why we shouldn't just revert to unknown; but
1965 // this isn't very important, we might as well be bug compatible.
1967 Diag(clang::diag::err_drv_unknown_language) << A->getValue();
1968 InputType = types::TY_Object;
1970 } else if (A->getOption().getID() == options::OPT__SLASH_U) {
1971 assert(A->getNumValues() == 1 && "The /U option has one value.");
1972 StringRef Val = A->getValue(0);
1973 if (Val.find_first_of("/\\") != StringRef::npos) {
1974 // Warn about e.g. "/Users/me/myfile.c".
1975 Diag(diag::warn_slash_u_filename) << Val;
1976 Diag(diag::note_use_dashdash);
1980 if (CCCIsCPP() && Inputs.empty()) {
1981 // If called as standalone preprocessor, stdin is processed
1982 // if no other input is present.
1983 Arg *A = MakeInputArg(Args, *Opts, "-");
1984 Inputs.push_back(std::make_pair(types::TY_C, A));
1989 /// Provides a convenient interface for different programming models to generate
1990 /// the required device actions.
1991 class OffloadingActionBuilder final {
1992 /// Flag used to trace errors in the builder.
1993 bool IsValid = false;
1995 /// The compilation that is using this builder.
1998 /// Map between an input argument and the offload kinds used to process it.
1999 std::map<const Arg *, unsigned> InputArgToOffloadKindMap;
2001 /// Builder interface. It doesn't build anything or keep any state.
2002 class DeviceActionBuilder {
2004 typedef llvm::SmallVector<phases::ID, phases::MaxNumberOfPhases> PhasesTy;
2006 enum ActionBuilderReturnCode {
2007 // The builder acted successfully on the current action.
2009 // The builder didn't have to act on the current action.
2011 // The builder was successful and requested the host action to not be
2017 /// Compilation associated with this builder.
2020 /// Tool chains associated with this builder. The same programming
2021 /// model may have associated one or more tool chains.
2022 SmallVector<const ToolChain *, 2> ToolChains;
2024 /// The derived arguments associated with this builder.
2025 DerivedArgList &Args;
2027 /// The inputs associated with this builder.
2028 const Driver::InputList &Inputs;
2030 /// The associated offload kind.
2031 Action::OffloadKind AssociatedOffloadKind = Action::OFK_None;
2034 DeviceActionBuilder(Compilation &C, DerivedArgList &Args,
2035 const Driver::InputList &Inputs,
2036 Action::OffloadKind AssociatedOffloadKind)
2037 : C(C), Args(Args), Inputs(Inputs),
2038 AssociatedOffloadKind(AssociatedOffloadKind) {}
2039 virtual ~DeviceActionBuilder() {}
2041 /// Fill up the array \a DA with all the device dependences that should be
2042 /// added to the provided host action \a HostAction. By default it is
2044 virtual ActionBuilderReturnCode
2045 getDeviceDependences(OffloadAction::DeviceDependences &DA,
2046 phases::ID CurPhase, phases::ID FinalPhase,
2048 return ABRT_Inactive;
2051 /// Update the state to include the provided host action \a HostAction as a
2052 /// dependency of the current device action. By default it is inactive.
2053 virtual ActionBuilderReturnCode addDeviceDepences(Action *HostAction) {
2054 return ABRT_Inactive;
2057 /// Append top level actions generated by the builder. Return true if errors
2059 virtual void appendTopLevelActions(ActionList &AL) {}
2061 /// Append linker actions generated by the builder. Return true if errors
2063 virtual void appendLinkDependences(OffloadAction::DeviceDependences &DA) {}
2065 /// Initialize the builder. Return true if any initialization errors are
2067 virtual bool initialize() { return false; }
2069 /// Return true if the builder can use bundling/unbundling.
2070 virtual bool canUseBundlerUnbundler() const { return false; }
2072 /// Return true if this builder is valid. We have a valid builder if we have
2073 /// associated device tool chains.
2074 bool isValid() { return !ToolChains.empty(); }
2076 /// Return the associated offload kind.
2077 Action::OffloadKind getAssociatedOffloadKind() {
2078 return AssociatedOffloadKind;
2082 /// \brief CUDA action builder. It injects device code in the host backend
2084 class CudaActionBuilder final : public DeviceActionBuilder {
2085 /// Flags to signal if the user requested host-only or device-only
2087 bool CompileHostOnly = false;
2088 bool CompileDeviceOnly = false;
2090 /// List of GPU architectures to use in this compilation.
2091 SmallVector<CudaArch, 4> GpuArchList;
2093 /// The CUDA actions for the current input.
2094 ActionList CudaDeviceActions;
2096 /// The CUDA fat binary if it was generated for the current input.
2097 Action *CudaFatBinary = nullptr;
2099 /// Flag that is set to true if this builder acted on the current input.
2100 bool IsActive = false;
2103 CudaActionBuilder(Compilation &C, DerivedArgList &Args,
2104 const Driver::InputList &Inputs)
2105 : DeviceActionBuilder(C, Args, Inputs, Action::OFK_Cuda) {}
2107 ActionBuilderReturnCode
2108 getDeviceDependences(OffloadAction::DeviceDependences &DA,
2109 phases::ID CurPhase, phases::ID FinalPhase,
2110 PhasesTy &Phases) override {
2112 return ABRT_Inactive;
2114 // If we don't have more CUDA actions, we don't have any dependences to
2115 // create for the host.
2116 if (CudaDeviceActions.empty())
2117 return ABRT_Success;
2119 assert(CudaDeviceActions.size() == GpuArchList.size() &&
2120 "Expecting one action per GPU architecture.");
2121 assert(!CompileHostOnly &&
2122 "Not expecting CUDA actions in host-only compilation.");
2124 // If we are generating code for the device or we are in a backend phase,
2125 // we attempt to generate the fat binary. We compile each arch to ptx and
2126 // assemble to cubin, then feed the cubin *and* the ptx into a device
2127 // "link" action, which uses fatbinary to combine these cubins into one
2128 // fatbin. The fatbin is then an input to the host action if not in
2129 // device-only mode.
2130 if (CompileDeviceOnly || CurPhase == phases::Backend) {
2131 ActionList DeviceActions;
2132 for (unsigned I = 0, E = GpuArchList.size(); I != E; ++I) {
2133 // Produce the device action from the current phase up to the assemble
2135 for (auto Ph : Phases) {
2136 // Skip the phases that were already dealt with.
2139 // We have to be consistent with the host final phase.
2140 if (Ph > FinalPhase)
2143 CudaDeviceActions[I] = C.getDriver().ConstructPhaseAction(
2144 C, Args, Ph, CudaDeviceActions[I]);
2146 if (Ph == phases::Assemble)
2150 // If we didn't reach the assemble phase, we can't generate the fat
2151 // binary. We don't need to generate the fat binary if we are not in
2152 // device-only mode.
2153 if (!isa<AssembleJobAction>(CudaDeviceActions[I]) ||
2157 Action *AssembleAction = CudaDeviceActions[I];
2158 assert(AssembleAction->getType() == types::TY_Object);
2159 assert(AssembleAction->getInputs().size() == 1);
2161 Action *BackendAction = AssembleAction->getInputs()[0];
2162 assert(BackendAction->getType() == types::TY_PP_Asm);
2164 for (auto &A : {AssembleAction, BackendAction}) {
2165 OffloadAction::DeviceDependences DDep;
2166 DDep.add(*A, *ToolChains.front(), CudaArchToString(GpuArchList[I]),
2168 DeviceActions.push_back(
2169 C.MakeAction<OffloadAction>(DDep, A->getType()));
2173 // We generate the fat binary if we have device input actions.
2174 if (!DeviceActions.empty()) {
2176 C.MakeAction<LinkJobAction>(DeviceActions, types::TY_CUDA_FATBIN);
2178 if (!CompileDeviceOnly) {
2179 DA.add(*CudaFatBinary, *ToolChains.front(), /*BoundArch=*/nullptr,
2181 // Clear the fat binary, it is already a dependence to an host
2183 CudaFatBinary = nullptr;
2186 // Remove the CUDA actions as they are already connected to an host
2187 // action or fat binary.
2188 CudaDeviceActions.clear();
2191 // We avoid creating host action in device-only mode.
2192 return CompileDeviceOnly ? ABRT_Ignore_Host : ABRT_Success;
2193 } else if (CurPhase > phases::Backend) {
2194 // If we are past the backend phase and still have a device action, we
2195 // don't have to do anything as this action is already a device
2196 // top-level action.
2197 return ABRT_Success;
2200 assert(CurPhase < phases::Backend && "Generating single CUDA "
2201 "instructions should only occur "
2202 "before the backend phase!");
2204 // By default, we produce an action for each device arch.
2205 for (Action *&A : CudaDeviceActions)
2206 A = C.getDriver().ConstructPhaseAction(C, Args, CurPhase, A);
2208 return ABRT_Success;
2211 ActionBuilderReturnCode addDeviceDepences(Action *HostAction) override {
2212 // While generating code for CUDA, we only depend on the host input action
2213 // to trigger the creation of all the CUDA device actions.
2215 // If we are dealing with an input action, replicate it for each GPU
2216 // architecture. If we are in host-only mode we return 'success' so that
2217 // the host uses the CUDA offload kind.
2218 if (auto *IA = dyn_cast<InputAction>(HostAction)) {
2219 assert(!GpuArchList.empty() &&
2220 "We should have at least one GPU architecture.");
2222 // If the host input is not CUDA, we don't need to bother about this
2224 if (IA->getType() != types::TY_CUDA) {
2225 // The builder will ignore this input.
2227 return ABRT_Inactive;
2230 // Set the flag to true, so that the builder acts on the current input.
2233 if (CompileHostOnly)
2234 return ABRT_Success;
2236 // Replicate inputs for each GPU architecture.
2237 for (unsigned I = 0, E = GpuArchList.size(); I != E; ++I)
2238 CudaDeviceActions.push_back(C.MakeAction<InputAction>(
2239 IA->getInputArg(), types::TY_CUDA_DEVICE));
2241 return ABRT_Success;
2244 return IsActive ? ABRT_Success : ABRT_Inactive;
2247 void appendTopLevelActions(ActionList &AL) override {
2248 // Utility to append actions to the top level list.
2249 auto AddTopLevel = [&](Action *A, CudaArch BoundArch) {
2250 OffloadAction::DeviceDependences Dep;
2251 Dep.add(*A, *ToolChains.front(), CudaArchToString(BoundArch),
2253 AL.push_back(C.MakeAction<OffloadAction>(Dep, A->getType()));
2256 // If we have a fat binary, add it to the list.
2257 if (CudaFatBinary) {
2258 AddTopLevel(CudaFatBinary, CudaArch::UNKNOWN);
2259 CudaDeviceActions.clear();
2260 CudaFatBinary = nullptr;
2264 if (CudaDeviceActions.empty())
2267 // If we have CUDA actions at this point, that's because we have a have
2268 // partial compilation, so we should have an action for each GPU
2270 assert(CudaDeviceActions.size() == GpuArchList.size() &&
2271 "Expecting one action per GPU architecture.");
2272 assert(ToolChains.size() == 1 &&
2273 "Expecting to have a sing CUDA toolchain.");
2274 for (unsigned I = 0, E = GpuArchList.size(); I != E; ++I)
2275 AddTopLevel(CudaDeviceActions[I], GpuArchList[I]);
2277 CudaDeviceActions.clear();
2280 bool initialize() override {
2281 // We don't need to support CUDA.
2282 if (!C.hasOffloadToolChain<Action::OFK_Cuda>())
2285 const ToolChain *HostTC = C.getSingleOffloadToolChain<Action::OFK_Host>();
2286 assert(HostTC && "No toolchain for host compilation.");
2287 if (HostTC->getTriple().isNVPTX()) {
2288 // We do not support targeting NVPTX for host compilation. Throw
2289 // an error and abort pipeline construction early so we don't trip
2290 // asserts that assume device-side compilation.
2291 C.getDriver().Diag(diag::err_drv_cuda_nvptx_host);
2295 ToolChains.push_back(C.getSingleOffloadToolChain<Action::OFK_Cuda>());
2297 Arg *PartialCompilationArg = Args.getLastArg(
2298 options::OPT_cuda_host_only, options::OPT_cuda_device_only,
2299 options::OPT_cuda_compile_host_device);
2300 CompileHostOnly = PartialCompilationArg &&
2301 PartialCompilationArg->getOption().matches(
2302 options::OPT_cuda_host_only);
2303 CompileDeviceOnly = PartialCompilationArg &&
2304 PartialCompilationArg->getOption().matches(
2305 options::OPT_cuda_device_only);
2307 // Collect all cuda_gpu_arch parameters, removing duplicates.
2308 std::set<CudaArch> GpuArchs;
2310 for (Arg *A : Args) {
2311 if (!(A->getOption().matches(options::OPT_cuda_gpu_arch_EQ) ||
2312 A->getOption().matches(options::OPT_no_cuda_gpu_arch_EQ)))
2316 const StringRef ArchStr = A->getValue();
2317 if (A->getOption().matches(options::OPT_no_cuda_gpu_arch_EQ) &&
2322 CudaArch Arch = StringToCudaArch(ArchStr);
2323 if (Arch == CudaArch::UNKNOWN) {
2324 C.getDriver().Diag(clang::diag::err_drv_cuda_bad_gpu_arch) << ArchStr;
2326 } else if (A->getOption().matches(options::OPT_cuda_gpu_arch_EQ))
2327 GpuArchs.insert(Arch);
2328 else if (A->getOption().matches(options::OPT_no_cuda_gpu_arch_EQ))
2329 GpuArchs.erase(Arch);
2331 llvm_unreachable("Unexpected option.");
2334 // Collect list of GPUs remaining in the set.
2335 for (CudaArch Arch : GpuArchs)
2336 GpuArchList.push_back(Arch);
2338 // Default to sm_20 which is the lowest common denominator for
2339 // supported GPUs. sm_20 code should work correctly, if
2340 // suboptimally, on all newer GPUs.
2341 if (GpuArchList.empty())
2342 GpuArchList.push_back(CudaArch::SM_20);
2348 /// OpenMP action builder. The host bitcode is passed to the device frontend
2349 /// and all the device linked images are passed to the host link phase.
2350 class OpenMPActionBuilder final : public DeviceActionBuilder {
2351 /// The OpenMP actions for the current input.
2352 ActionList OpenMPDeviceActions;
2354 /// The linker inputs obtained for each toolchain.
2355 SmallVector<ActionList, 8> DeviceLinkerInputs;
2358 OpenMPActionBuilder(Compilation &C, DerivedArgList &Args,
2359 const Driver::InputList &Inputs)
2360 : DeviceActionBuilder(C, Args, Inputs, Action::OFK_OpenMP) {}
2362 ActionBuilderReturnCode
2363 getDeviceDependences(OffloadAction::DeviceDependences &DA,
2364 phases::ID CurPhase, phases::ID FinalPhase,
2365 PhasesTy &Phases) override {
2367 // We should always have an action for each input.
2368 assert(OpenMPDeviceActions.size() == ToolChains.size() &&
2369 "Number of OpenMP actions and toolchains do not match.");
2371 // The host only depends on device action in the linking phase, when all
2372 // the device images have to be embedded in the host image.
2373 if (CurPhase == phases::Link) {
2374 assert(ToolChains.size() == DeviceLinkerInputs.size() &&
2375 "Toolchains and linker inputs sizes do not match.");
2376 auto LI = DeviceLinkerInputs.begin();
2377 for (auto *A : OpenMPDeviceActions) {
2382 // We passed the device action as a host dependence, so we don't need to
2383 // do anything else with them.
2384 OpenMPDeviceActions.clear();
2385 return ABRT_Success;
2388 // By default, we produce an action for each device arch.
2389 for (Action *&A : OpenMPDeviceActions)
2390 A = C.getDriver().ConstructPhaseAction(C, Args, CurPhase, A);
2392 return ABRT_Success;
2395 ActionBuilderReturnCode addDeviceDepences(Action *HostAction) override {
2397 // If this is an input action replicate it for each OpenMP toolchain.
2398 if (auto *IA = dyn_cast<InputAction>(HostAction)) {
2399 OpenMPDeviceActions.clear();
2400 for (unsigned I = 0; I < ToolChains.size(); ++I)
2401 OpenMPDeviceActions.push_back(
2402 C.MakeAction<InputAction>(IA->getInputArg(), IA->getType()));
2403 return ABRT_Success;
2406 // If this is an unbundling action use it as is for each OpenMP toolchain.
2407 if (auto *UA = dyn_cast<OffloadUnbundlingJobAction>(HostAction)) {
2408 OpenMPDeviceActions.clear();
2409 for (unsigned I = 0; I < ToolChains.size(); ++I) {
2410 OpenMPDeviceActions.push_back(UA);
2411 UA->registerDependentActionInfo(
2412 ToolChains[I], /*BoundArch=*/StringRef(), Action::OFK_OpenMP);
2414 return ABRT_Success;
2417 // When generating code for OpenMP we use the host compile phase result as
2418 // a dependence to the device compile phase so that it can learn what
2419 // declarations should be emitted. However, this is not the only use for
2420 // the host action, so we prevent it from being collapsed.
2421 if (isa<CompileJobAction>(HostAction)) {
2422 HostAction->setCannotBeCollapsedWithNextDependentAction();
2423 assert(ToolChains.size() == OpenMPDeviceActions.size() &&
2424 "Toolchains and device action sizes do not match.");
2425 OffloadAction::HostDependence HDep(
2426 *HostAction, *C.getSingleOffloadToolChain<Action::OFK_Host>(),
2427 /*BoundArch=*/nullptr, Action::OFK_OpenMP);
2428 auto TC = ToolChains.begin();
2429 for (Action *&A : OpenMPDeviceActions) {
2430 assert(isa<CompileJobAction>(A));
2431 OffloadAction::DeviceDependences DDep;
2432 DDep.add(*A, **TC, /*BoundArch=*/nullptr, Action::OFK_OpenMP);
2433 A = C.MakeAction<OffloadAction>(HDep, DDep);
2437 return ABRT_Success;
2440 void appendTopLevelActions(ActionList &AL) override {
2441 if (OpenMPDeviceActions.empty())
2444 // We should always have an action for each input.
2445 assert(OpenMPDeviceActions.size() == ToolChains.size() &&
2446 "Number of OpenMP actions and toolchains do not match.");
2448 // Append all device actions followed by the proper offload action.
2449 auto TI = ToolChains.begin();
2450 for (auto *A : OpenMPDeviceActions) {
2451 OffloadAction::DeviceDependences Dep;
2452 Dep.add(*A, **TI, /*BoundArch=*/nullptr, Action::OFK_OpenMP);
2453 AL.push_back(C.MakeAction<OffloadAction>(Dep, A->getType()));
2456 // We no longer need the action stored in this builder.
2457 OpenMPDeviceActions.clear();
2460 void appendLinkDependences(OffloadAction::DeviceDependences &DA) override {
2461 assert(ToolChains.size() == DeviceLinkerInputs.size() &&
2462 "Toolchains and linker inputs sizes do not match.");
2464 // Append a new link action for each device.
2465 auto TC = ToolChains.begin();
2466 for (auto &LI : DeviceLinkerInputs) {
2467 auto *DeviceLinkAction =
2468 C.MakeAction<LinkJobAction>(LI, types::TY_Image);
2469 DA.add(*DeviceLinkAction, **TC, /*BoundArch=*/nullptr,
2470 Action::OFK_OpenMP);
2475 bool initialize() override {
2476 // Get the OpenMP toolchains. If we don't get any, the action builder will
2477 // know there is nothing to do related to OpenMP offloading.
2478 auto OpenMPTCRange = C.getOffloadToolChains<Action::OFK_OpenMP>();
2479 for (auto TI = OpenMPTCRange.first, TE = OpenMPTCRange.second; TI != TE;
2481 ToolChains.push_back(TI->second);
2483 DeviceLinkerInputs.resize(ToolChains.size());
2487 bool canUseBundlerUnbundler() const override {
2488 // OpenMP should use bundled files whenever possible.
2494 /// TODO: Add the implementation for other specialized builders here.
2497 /// Specialized builders being used by this offloading action builder.
2498 SmallVector<DeviceActionBuilder *, 4> SpecializedBuilders;
2500 /// Flag set to true if all valid builders allow file bundling/unbundling.
2504 OffloadingActionBuilder(Compilation &C, DerivedArgList &Args,
2505 const Driver::InputList &Inputs)
2507 // Create a specialized builder for each device toolchain.
2511 // Create a specialized builder for CUDA.
2512 SpecializedBuilders.push_back(new CudaActionBuilder(C, Args, Inputs));
2514 // Create a specialized builder for OpenMP.
2515 SpecializedBuilders.push_back(new OpenMPActionBuilder(C, Args, Inputs));
2518 // TODO: Build other specialized builders here.
2521 // Initialize all the builders, keeping track of errors. If all valid
2522 // builders agree that we can use bundling, set the flag to true.
2523 unsigned ValidBuilders = 0u;
2524 unsigned ValidBuildersSupportingBundling = 0u;
2525 for (auto *SB : SpecializedBuilders) {
2526 IsValid = IsValid && !SB->initialize();
2528 // Update the counters if the builder is valid.
2529 if (SB->isValid()) {
2531 if (SB->canUseBundlerUnbundler())
2532 ++ValidBuildersSupportingBundling;
2536 ValidBuilders && ValidBuilders == ValidBuildersSupportingBundling;
2539 ~OffloadingActionBuilder() {
2540 for (auto *SB : SpecializedBuilders)
2544 /// Generate an action that adds device dependences (if any) to a host action.
2545 /// If no device dependence actions exist, just return the host action \a
2546 /// HostAction. If an error is found or if no builder requires the host action
2547 /// to be generated, return nullptr.
2549 addDeviceDependencesToHostAction(Action *HostAction, const Arg *InputArg,
2550 phases::ID CurPhase, phases::ID FinalPhase,
2551 DeviceActionBuilder::PhasesTy &Phases) {
2555 if (SpecializedBuilders.empty())
2558 assert(HostAction && "Invalid host action!");
2560 OffloadAction::DeviceDependences DDeps;
2561 // Check if all the programming models agree we should not emit the host
2562 // action. Also, keep track of the offloading kinds employed.
2563 auto &OffloadKind = InputArgToOffloadKindMap[InputArg];
2564 unsigned InactiveBuilders = 0u;
2565 unsigned IgnoringBuilders = 0u;
2566 for (auto *SB : SpecializedBuilders) {
2567 if (!SB->isValid()) {
2573 SB->getDeviceDependences(DDeps, CurPhase, FinalPhase, Phases);
2575 // If the builder explicitly says the host action should be ignored,
2576 // we need to increment the variable that tracks the builders that request
2577 // the host object to be ignored.
2578 if (RetCode == DeviceActionBuilder::ABRT_Ignore_Host)
2581 // Unless the builder was inactive for this action, we have to record the
2582 // offload kind because the host will have to use it.
2583 if (RetCode != DeviceActionBuilder::ABRT_Inactive)
2584 OffloadKind |= SB->getAssociatedOffloadKind();
2587 // If all builders agree that the host object should be ignored, just return
2589 if (IgnoringBuilders &&
2590 SpecializedBuilders.size() == (InactiveBuilders + IgnoringBuilders))
2593 if (DDeps.getActions().empty())
2596 // We have dependences we need to bundle together. We use an offload action
2598 OffloadAction::HostDependence HDep(
2599 *HostAction, *C.getSingleOffloadToolChain<Action::OFK_Host>(),
2600 /*BoundArch=*/nullptr, DDeps);
2601 return C.MakeAction<OffloadAction>(HDep, DDeps);
2604 /// Generate an action that adds a host dependence to a device action. The
2605 /// results will be kept in this action builder. Return true if an error was
2607 bool addHostDependenceToDeviceActions(Action *&HostAction,
2608 const Arg *InputArg) {
2612 // If we are supporting bundling/unbundling and the current action is an
2613 // input action of non-source file, we replace the host action by the
2614 // unbundling action. The bundler tool has the logic to detect if an input
2615 // is a bundle or not and if the input is not a bundle it assumes it is a
2616 // host file. Therefore it is safe to create an unbundling action even if
2617 // the input is not a bundle.
2618 if (CanUseBundler && isa<InputAction>(HostAction) &&
2619 InputArg->getOption().getKind() == llvm::opt::Option::InputClass &&
2620 !types::isSrcFile(HostAction->getType())) {
2621 auto UnbundlingHostAction =
2622 C.MakeAction<OffloadUnbundlingJobAction>(HostAction);
2623 UnbundlingHostAction->registerDependentActionInfo(
2624 C.getSingleOffloadToolChain<Action::OFK_Host>(),
2625 /*BoundArch=*/StringRef(), Action::OFK_Host);
2626 HostAction = UnbundlingHostAction;
2629 assert(HostAction && "Invalid host action!");
2631 // Register the offload kinds that are used.
2632 auto &OffloadKind = InputArgToOffloadKindMap[InputArg];
2633 for (auto *SB : SpecializedBuilders) {
2637 auto RetCode = SB->addDeviceDepences(HostAction);
2639 // Host dependences for device actions are not compatible with that same
2640 // action being ignored.
2641 assert(RetCode != DeviceActionBuilder::ABRT_Ignore_Host &&
2642 "Host dependence not expected to be ignored.!");
2644 // Unless the builder was inactive for this action, we have to record the
2645 // offload kind because the host will have to use it.
2646 if (RetCode != DeviceActionBuilder::ABRT_Inactive)
2647 OffloadKind |= SB->getAssociatedOffloadKind();
2653 /// Add the offloading top level actions to the provided action list. This
2654 /// function can replace the host action by a bundling action if the
2655 /// programming models allow it.
2656 bool appendTopLevelActions(ActionList &AL, Action *HostAction,
2657 const Arg *InputArg) {
2658 // Get the device actions to be appended.
2659 ActionList OffloadAL;
2660 for (auto *SB : SpecializedBuilders) {
2663 SB->appendTopLevelActions(OffloadAL);
2666 // If we can use the bundler, replace the host action by the bundling one in
2667 // the resulting list. Otherwise, just append the device actions.
2668 if (CanUseBundler && !OffloadAL.empty()) {
2669 // Add the host action to the list in order to create the bundling action.
2670 OffloadAL.push_back(HostAction);
2672 // We expect that the host action was just appended to the action list
2673 // before this method was called.
2674 assert(HostAction == AL.back() && "Host action not in the list??");
2675 HostAction = C.MakeAction<OffloadBundlingJobAction>(OffloadAL);
2676 AL.back() = HostAction;
2678 AL.append(OffloadAL.begin(), OffloadAL.end());
2680 // Propagate to the current host action (if any) the offload information
2681 // associated with the current input.
2683 HostAction->propagateHostOffloadInfo(InputArgToOffloadKindMap[InputArg],
2684 /*BoundArch=*/nullptr);
2688 /// Processes the host linker action. This currently consists of replacing it
2689 /// with an offload action if there are device link objects and propagate to
2690 /// the host action all the offload kinds used in the current compilation. The
2691 /// resulting action is returned.
2692 Action *processHostLinkAction(Action *HostAction) {
2693 // Add all the dependences from the device linking actions.
2694 OffloadAction::DeviceDependences DDeps;
2695 for (auto *SB : SpecializedBuilders) {
2699 SB->appendLinkDependences(DDeps);
2702 // Calculate all the offload kinds used in the current compilation.
2703 unsigned ActiveOffloadKinds = 0u;
2704 for (auto &I : InputArgToOffloadKindMap)
2705 ActiveOffloadKinds |= I.second;
2707 // If we don't have device dependencies, we don't have to create an offload
2709 if (DDeps.getActions().empty()) {
2710 // Propagate all the active kinds to host action. Given that it is a link
2711 // action it is assumed to depend on all actions generated so far.
2712 HostAction->propagateHostOffloadInfo(ActiveOffloadKinds,
2713 /*BoundArch=*/nullptr);
2717 // Create the offload action with all dependences. When an offload action
2718 // is created the kinds are propagated to the host action, so we don't have
2719 // to do that explicitly here.
2720 OffloadAction::HostDependence HDep(
2721 *HostAction, *C.getSingleOffloadToolChain<Action::OFK_Host>(),
2722 /*BoundArch*/ nullptr, ActiveOffloadKinds);
2723 return C.MakeAction<OffloadAction>(HDep, DDeps);
2726 } // anonymous namespace.
2728 void Driver::BuildActions(Compilation &C, DerivedArgList &Args,
2729 const InputList &Inputs, ActionList &Actions) const {
2730 llvm::PrettyStackTraceString CrashInfo("Building compilation actions");
2732 if (!SuppressMissingInputWarning && Inputs.empty()) {
2733 Diag(clang::diag::err_drv_no_input_files);
2738 phases::ID FinalPhase = getFinalPhase(Args, &FinalPhaseArg);
2740 if (FinalPhase == phases::Link) {
2741 if (Args.hasArg(options::OPT_emit_llvm))
2742 Diag(clang::diag::err_drv_emit_llvm_link);
2743 if (IsCLMode() && LTOMode != LTOK_None &&
2744 !Args.getLastArgValue(options::OPT_fuse_ld_EQ).equals_lower("lld"))
2745 Diag(clang::diag::err_drv_lto_without_lld);
2748 // Reject -Z* at the top level, these options should never have been exposed
2750 if (Arg *A = Args.getLastArg(options::OPT_Z_Joined))
2751 Diag(clang::diag::err_drv_use_of_Z_option) << A->getAsString(Args);
2753 // Diagnose misuse of /Fo.
2754 if (Arg *A = Args.getLastArg(options::OPT__SLASH_Fo)) {
2755 StringRef V = A->getValue();
2756 if (Inputs.size() > 1 && !V.empty() &&
2757 !llvm::sys::path::is_separator(V.back())) {
2758 // Check whether /Fo tries to name an output file for multiple inputs.
2759 Diag(clang::diag::err_drv_out_file_argument_with_multiple_sources)
2760 << A->getSpelling() << V;
2761 Args.eraseArg(options::OPT__SLASH_Fo);
2765 // Diagnose misuse of /Fa.
2766 if (Arg *A = Args.getLastArg(options::OPT__SLASH_Fa)) {
2767 StringRef V = A->getValue();
2768 if (Inputs.size() > 1 && !V.empty() &&
2769 !llvm::sys::path::is_separator(V.back())) {
2770 // Check whether /Fa tries to name an asm file for multiple inputs.
2771 Diag(clang::diag::err_drv_out_file_argument_with_multiple_sources)
2772 << A->getSpelling() << V;
2773 Args.eraseArg(options::OPT__SLASH_Fa);
2777 // Diagnose misuse of /o.
2778 if (Arg *A = Args.getLastArg(options::OPT__SLASH_o)) {
2779 if (A->getValue()[0] == '\0') {
2780 // It has to have a value.
2781 Diag(clang::diag::err_drv_missing_argument) << A->getSpelling() << 1;
2782 Args.eraseArg(options::OPT__SLASH_o);
2786 // Diagnose unsupported forms of /Yc /Yu. Ignore /Yc/Yu for now if:
2787 // * no filename after it
2788 // * both /Yc and /Yu passed but with different filenames
2789 // * corresponding file not also passed as /FI
2790 Arg *YcArg = Args.getLastArg(options::OPT__SLASH_Yc);
2791 Arg *YuArg = Args.getLastArg(options::OPT__SLASH_Yu);
2792 if (YcArg && YcArg->getValue()[0] == '\0') {
2793 Diag(clang::diag::warn_drv_ycyu_no_arg_clang_cl) << YcArg->getSpelling();
2794 Args.eraseArg(options::OPT__SLASH_Yc);
2797 if (YuArg && YuArg->getValue()[0] == '\0') {
2798 Diag(clang::diag::warn_drv_ycyu_no_arg_clang_cl) << YuArg->getSpelling();
2799 Args.eraseArg(options::OPT__SLASH_Yu);
2802 if (YcArg && YuArg && strcmp(YcArg->getValue(), YuArg->getValue()) != 0) {
2803 Diag(clang::diag::warn_drv_ycyu_different_arg_clang_cl);
2804 Args.eraseArg(options::OPT__SLASH_Yc);
2805 Args.eraseArg(options::OPT__SLASH_Yu);
2806 YcArg = YuArg = nullptr;
2808 if (YcArg || YuArg) {
2809 StringRef Val = YcArg ? YcArg->getValue() : YuArg->getValue();
2810 bool FoundMatchingInclude = false;
2811 for (const Arg *Inc : Args.filtered(options::OPT_include)) {
2812 // FIXME: Do case-insensitive matching and consider / and \ as equal.
2813 if (Inc->getValue() == Val)
2814 FoundMatchingInclude = true;
2816 if (!FoundMatchingInclude) {
2817 Diag(clang::diag::warn_drv_ycyu_no_fi_arg_clang_cl)
2818 << (YcArg ? YcArg : YuArg)->getSpelling();
2819 Args.eraseArg(options::OPT__SLASH_Yc);
2820 Args.eraseArg(options::OPT__SLASH_Yu);
2821 YcArg = YuArg = nullptr;
2824 if (YcArg && Inputs.size() > 1) {
2825 Diag(clang::diag::warn_drv_yc_multiple_inputs_clang_cl);
2826 Args.eraseArg(options::OPT__SLASH_Yc);
2829 if (Args.hasArg(options::OPT__SLASH_Y_)) {
2830 // /Y- disables all pch handling. Rather than check for it everywhere,
2831 // just remove clang-cl pch-related flags here.
2832 Args.eraseArg(options::OPT__SLASH_Fp);
2833 Args.eraseArg(options::OPT__SLASH_Yc);
2834 Args.eraseArg(options::OPT__SLASH_Yu);
2835 YcArg = YuArg = nullptr;
2838 // Builder to be used to build offloading actions.
2839 OffloadingActionBuilder OffloadBuilder(C, Args, Inputs);
2841 // Construct the actions to perform.
2842 ActionList LinkerInputs;
2844 llvm::SmallVector<phases::ID, phases::MaxNumberOfPhases> PL;
2845 for (auto &I : Inputs) {
2846 types::ID InputType = I.first;
2847 const Arg *InputArg = I.second;
2850 types::getCompilationPhases(InputType, PL);
2852 // If the first step comes after the final phase we are doing as part of
2853 // this compilation, warn the user about it.
2854 phases::ID InitialPhase = PL[0];
2855 if (InitialPhase > FinalPhase) {
2856 // Claim here to avoid the more general unused warning.
2859 // Suppress all unused style warnings with -Qunused-arguments
2860 if (Args.hasArg(options::OPT_Qunused_arguments))
2863 // Special case when final phase determined by binary name, rather than
2864 // by a command-line argument with a corresponding Arg.
2866 Diag(clang::diag::warn_drv_input_file_unused_by_cpp)
2867 << InputArg->getAsString(Args) << getPhaseName(InitialPhase);
2868 // Special case '-E' warning on a previously preprocessed file to make
2870 else if (InitialPhase == phases::Compile &&
2871 FinalPhase == phases::Preprocess &&
2872 getPreprocessedType(InputType) == types::TY_INVALID)
2873 Diag(clang::diag::warn_drv_preprocessed_input_file_unused)
2874 << InputArg->getAsString(Args) << !!FinalPhaseArg
2875 << (FinalPhaseArg ? FinalPhaseArg->getOption().getName() : "");
2877 Diag(clang::diag::warn_drv_input_file_unused)
2878 << InputArg->getAsString(Args) << getPhaseName(InitialPhase)
2880 << (FinalPhaseArg ? FinalPhaseArg->getOption().getName() : "");
2885 // Add a separate precompile phase for the compile phase.
2886 if (FinalPhase >= phases::Compile) {
2887 const types::ID HeaderType = lookupHeaderTypeForSourceType(InputType);
2888 llvm::SmallVector<phases::ID, phases::MaxNumberOfPhases> PCHPL;
2889 types::getCompilationPhases(HeaderType, PCHPL);
2890 Arg *PchInputArg = MakeInputArg(Args, *Opts, YcArg->getValue());
2892 // Build the pipeline for the pch file.
2893 Action *ClangClPch =
2894 C.MakeAction<InputAction>(*PchInputArg, HeaderType);
2895 for (phases::ID Phase : PCHPL)
2896 ClangClPch = ConstructPhaseAction(C, Args, Phase, ClangClPch);
2898 Actions.push_back(ClangClPch);
2899 // The driver currently exits after the first failed command. This
2900 // relies on that behavior, to make sure if the pch generation fails,
2901 // the main compilation won't run.
2905 // Build the pipeline for this file.
2906 Action *Current = C.MakeAction<InputAction>(*InputArg, InputType);
2908 // Use the current host action in any of the offloading actions, if
2910 if (OffloadBuilder.addHostDependenceToDeviceActions(Current, InputArg))
2913 for (SmallVectorImpl<phases::ID>::iterator i = PL.begin(), e = PL.end();
2915 phases::ID Phase = *i;
2917 // We are done if this step is past what the user requested.
2918 if (Phase > FinalPhase)
2921 // Add any offload action the host action depends on.
2922 Current = OffloadBuilder.addDeviceDependencesToHostAction(
2923 Current, InputArg, Phase, FinalPhase, PL);
2927 // Queue linker inputs.
2928 if (Phase == phases::Link) {
2929 assert((i + 1) == e && "linking must be final compilation step.");
2930 LinkerInputs.push_back(Current);
2935 // Otherwise construct the appropriate action.
2936 auto *NewCurrent = ConstructPhaseAction(C, Args, Phase, Current);
2938 // We didn't create a new action, so we will just move to the next phase.
2939 if (NewCurrent == Current)
2942 Current = NewCurrent;
2944 // Use the current host action in any of the offloading actions, if
2946 if (OffloadBuilder.addHostDependenceToDeviceActions(Current, InputArg))
2949 if (Current->getType() == types::TY_Nothing)
2953 // If we ended with something, add to the output list.
2955 Actions.push_back(Current);
2957 // Add any top level actions generated for offloading.
2958 OffloadBuilder.appendTopLevelActions(Actions, Current, InputArg);
2961 // Add a link action if necessary.
2962 if (!LinkerInputs.empty()) {
2963 Action *LA = C.MakeAction<LinkJobAction>(LinkerInputs, types::TY_Image);
2964 LA = OffloadBuilder.processHostLinkAction(LA);
2965 Actions.push_back(LA);
2968 // If we are linking, claim any options which are obviously only used for
2970 if (FinalPhase == phases::Link && PL.size() == 1) {
2971 Args.ClaimAllArgs(options::OPT_CompileOnly_Group);
2972 Args.ClaimAllArgs(options::OPT_cl_compile_Group);
2975 // Claim ignored clang-cl options.
2976 Args.ClaimAllArgs(options::OPT_cl_ignored_Group);
2978 // Claim --cuda-host-only and --cuda-compile-host-device, which may be passed
2979 // to non-CUDA compilations and should not trigger warnings there.
2980 Args.ClaimAllArgs(options::OPT_cuda_host_only);
2981 Args.ClaimAllArgs(options::OPT_cuda_compile_host_device);
2984 Action *Driver::ConstructPhaseAction(Compilation &C, const ArgList &Args,
2985 phases::ID Phase, Action *Input) const {
2986 llvm::PrettyStackTraceString CrashInfo("Constructing phase actions");
2988 // Some types skip the assembler phase (e.g., llvm-bc), but we can't
2989 // encode this in the steps because the intermediate type depends on
2990 // arguments. Just special case here.
2991 if (Phase == phases::Assemble && Input->getType() != types::TY_PP_Asm)
2994 // Build the appropriate action.
2997 llvm_unreachable("link action invalid here.");
2998 case phases::Preprocess: {
3000 // -{M, MM} alter the output type.
3001 if (Args.hasArg(options::OPT_M, options::OPT_MM)) {
3002 OutputTy = types::TY_Dependencies;
3004 OutputTy = Input->getType();
3005 if (!Args.hasFlag(options::OPT_frewrite_includes,
3006 options::OPT_fno_rewrite_includes, false) &&
3007 !Args.hasFlag(options::OPT_frewrite_imports,
3008 options::OPT_fno_rewrite_imports, false) &&
3010 OutputTy = types::getPreprocessedType(OutputTy);
3011 assert(OutputTy != types::TY_INVALID &&
3012 "Cannot preprocess this input type!");
3014 return C.MakeAction<PreprocessJobAction>(Input, OutputTy);
3016 case phases::Precompile: {
3017 types::ID OutputTy = getPrecompiledType(Input->getType());
3018 assert(OutputTy != types::TY_INVALID &&
3019 "Cannot precompile this input type!");
3020 if (Args.hasArg(options::OPT_fsyntax_only)) {
3021 // Syntax checks should not emit a PCH file
3022 OutputTy = types::TY_Nothing;
3024 return C.MakeAction<PrecompileJobAction>(Input, OutputTy);
3026 case phases::Compile: {
3027 if (Args.hasArg(options::OPT_fsyntax_only))
3028 return C.MakeAction<CompileJobAction>(Input, types::TY_Nothing);
3029 if (Args.hasArg(options::OPT_rewrite_objc))
3030 return C.MakeAction<CompileJobAction>(Input, types::TY_RewrittenObjC);
3031 if (Args.hasArg(options::OPT_rewrite_legacy_objc))
3032 return C.MakeAction<CompileJobAction>(Input,
3033 types::TY_RewrittenLegacyObjC);
3034 if (Args.hasArg(options::OPT__analyze, options::OPT__analyze_auto))
3035 return C.MakeAction<AnalyzeJobAction>(Input, types::TY_Plist);
3036 if (Args.hasArg(options::OPT__migrate))
3037 return C.MakeAction<MigrateJobAction>(Input, types::TY_Remap);
3038 if (Args.hasArg(options::OPT_emit_ast))
3039 return C.MakeAction<CompileJobAction>(Input, types::TY_AST);
3040 if (Args.hasArg(options::OPT_module_file_info))
3041 return C.MakeAction<CompileJobAction>(Input, types::TY_ModuleFile);
3042 if (Args.hasArg(options::OPT_verify_pch))
3043 return C.MakeAction<VerifyPCHJobAction>(Input, types::TY_Nothing);
3044 return C.MakeAction<CompileJobAction>(Input, types::TY_LLVM_BC);
3046 case phases::Backend: {
3049 Args.hasArg(options::OPT_S) ? types::TY_LTO_IR : types::TY_LTO_BC;
3050 return C.MakeAction<BackendJobAction>(Input, Output);
3052 if (Args.hasArg(options::OPT_emit_llvm)) {
3054 Args.hasArg(options::OPT_S) ? types::TY_LLVM_IR : types::TY_LLVM_BC;
3055 return C.MakeAction<BackendJobAction>(Input, Output);
3057 return C.MakeAction<BackendJobAction>(Input, types::TY_PP_Asm);
3059 case phases::Assemble:
3060 return C.MakeAction<AssembleJobAction>(std::move(Input), types::TY_Object);
3063 llvm_unreachable("invalid phase in ConstructPhaseAction");
3066 void Driver::BuildJobs(Compilation &C) const {
3067 llvm::PrettyStackTraceString CrashInfo("Building compilation jobs");
3069 Arg *FinalOutput = C.getArgs().getLastArg(options::OPT_o);
3071 // It is an error to provide a -o option if we are making multiple output
3074 unsigned NumOutputs = 0;
3075 for (const Action *A : C.getActions())
3076 if (A->getType() != types::TY_Nothing)
3079 if (NumOutputs > 1) {
3080 Diag(clang::diag::err_drv_output_argument_with_multiple_files);
3081 FinalOutput = nullptr;
3085 // Collect the list of architectures.
3086 llvm::StringSet<> ArchNames;
3087 if (C.getDefaultToolChain().getTriple().isOSBinFormatMachO())
3088 for (const Arg *A : C.getArgs())
3089 if (A->getOption().matches(options::OPT_arch))
3090 ArchNames.insert(A->getValue());
3092 // Set of (Action, canonical ToolChain triple) pairs we've built jobs for.
3093 std::map<std::pair<const Action *, std::string>, InputInfo> CachedResults;
3094 for (Action *A : C.getActions()) {
3095 // If we are linking an image for multiple archs then the linker wants
3096 // -arch_multiple and -final_output <final image name>. Unfortunately, this
3097 // doesn't fit in cleanly because we have to pass this information down.
3099 // FIXME: This is a hack; find a cleaner way to integrate this into the
3101 const char *LinkingOutput = nullptr;
3102 if (isa<LipoJobAction>(A)) {
3104 LinkingOutput = FinalOutput->getValue();
3106 LinkingOutput = getDefaultImageName();
3109 BuildJobsForAction(C, A, &C.getDefaultToolChain(),
3110 /*BoundArch*/ StringRef(),
3111 /*AtTopLevel*/ true,
3112 /*MultipleArchs*/ ArchNames.size() > 1,
3113 /*LinkingOutput*/ LinkingOutput, CachedResults,
3114 /*TargetDeviceOffloadKind*/ Action::OFK_None);
3117 // If the user passed -Qunused-arguments or there were errors, don't warn
3118 // about any unused arguments.
3119 if (Diags.hasErrorOccurred() ||
3120 C.getArgs().hasArg(options::OPT_Qunused_arguments))
3124 (void)C.getArgs().hasArg(options::OPT__HASH_HASH_HASH);
3126 // Claim --driver-mode, --rsp-quoting, it was handled earlier.
3127 (void)C.getArgs().hasArg(options::OPT_driver_mode);
3128 (void)C.getArgs().hasArg(options::OPT_rsp_quoting);
3130 for (Arg *A : C.getArgs()) {
3131 // FIXME: It would be nice to be able to send the argument to the
3132 // DiagnosticsEngine, so that extra values, position, and so on could be
3134 if (!A->isClaimed()) {
3135 if (A->getOption().hasFlag(options::NoArgumentUnused))
3138 // Suppress the warning automatically if this is just a flag, and it is an
3139 // instance of an argument we already claimed.
3140 const Option &Opt = A->getOption();
3141 if (Opt.getKind() == Option::FlagClass) {
3142 bool DuplicateClaimed = false;
3144 for (const Arg *AA : C.getArgs().filtered(&Opt)) {
3145 if (AA->isClaimed()) {
3146 DuplicateClaimed = true;
3151 if (DuplicateClaimed)
3155 // In clang-cl, don't mention unknown arguments here since they have
3156 // already been warned about.
3157 if (!IsCLMode() || !A->getOption().matches(options::OPT_UNKNOWN))
3158 Diag(clang::diag::warn_drv_unused_argument)
3159 << A->getAsString(C.getArgs());
3165 /// Utility class to control the collapse of dependent actions and select the
3166 /// tools accordingly.
3167 class ToolSelector final {
3168 /// The tool chain this selector refers to.
3169 const ToolChain &TC;
3171 /// The compilation this selector refers to.
3172 const Compilation &C;
3174 /// The base action this selector refers to.
3175 const JobAction *BaseAction;
3177 /// Set to true if the current toolchain refers to host actions.
3178 bool IsHostSelector;
3180 /// Set to true if save-temps and embed-bitcode functionalities are active.
3184 /// Get previous dependent action or null if that does not exist. If
3185 /// \a CanBeCollapsed is false, that action must be legal to collapse or
3186 /// null will be returned.
3187 const JobAction *getPrevDependentAction(const ActionList &Inputs,
3188 ActionList &SavedOffloadAction,
3189 bool CanBeCollapsed = true) {
3190 // An option can be collapsed only if it has a single input.
3191 if (Inputs.size() != 1)
3194 Action *CurAction = *Inputs.begin();
3195 if (CanBeCollapsed &&
3196 !CurAction->isCollapsingWithNextDependentActionLegal())
3199 // If the input action is an offload action. Look through it and save any
3200 // offload action that can be dropped in the event of a collapse.
3201 if (auto *OA = dyn_cast<OffloadAction>(CurAction)) {
3202 // If the dependent action is a device action, we will attempt to collapse
3203 // only with other device actions. Otherwise, we would do the same but
3204 // with host actions only.
3205 if (!IsHostSelector) {
3206 if (OA->hasSingleDeviceDependence(/*DoNotConsiderHostActions=*/true)) {
3208 OA->getSingleDeviceDependence(/*DoNotConsiderHostActions=*/true);
3209 if (CanBeCollapsed &&
3210 !CurAction->isCollapsingWithNextDependentActionLegal())
3212 SavedOffloadAction.push_back(OA);
3213 return dyn_cast<JobAction>(CurAction);
3215 } else if (OA->hasHostDependence()) {
3216 CurAction = OA->getHostDependence();
3217 if (CanBeCollapsed &&
3218 !CurAction->isCollapsingWithNextDependentActionLegal())
3220 SavedOffloadAction.push_back(OA);
3221 return dyn_cast<JobAction>(CurAction);
3226 return dyn_cast<JobAction>(CurAction);
3229 /// Return true if an assemble action can be collapsed.
3230 bool canCollapseAssembleAction() const {
3231 return TC.useIntegratedAs() && !SaveTemps &&
3232 !C.getArgs().hasArg(options::OPT_via_file_asm) &&
3233 !C.getArgs().hasArg(options::OPT__SLASH_FA) &&
3234 !C.getArgs().hasArg(options::OPT__SLASH_Fa);
3237 /// Return true if a preprocessor action can be collapsed.
3238 bool canCollapsePreprocessorAction() const {
3239 return !C.getArgs().hasArg(options::OPT_no_integrated_cpp) &&
3240 !C.getArgs().hasArg(options::OPT_traditional_cpp) && !SaveTemps &&
3241 !C.getArgs().hasArg(options::OPT_rewrite_objc);
3244 /// Struct that relates an action with the offload actions that would be
3245 /// collapsed with it.
3246 struct JobActionInfo final {
3247 /// The action this info refers to.
3248 const JobAction *JA = nullptr;
3249 /// The offload actions we need to take care off if this action is
3251 ActionList SavedOffloadAction;
3254 /// Append collapsed offload actions from the give nnumber of elements in the
3255 /// action info array.
3256 static void AppendCollapsedOffloadAction(ActionList &CollapsedOffloadAction,
3257 ArrayRef<JobActionInfo> &ActionInfo,
3258 unsigned ElementNum) {
3259 assert(ElementNum <= ActionInfo.size() && "Invalid number of elements.");
3260 for (unsigned I = 0; I < ElementNum; ++I)
3261 CollapsedOffloadAction.append(ActionInfo[I].SavedOffloadAction.begin(),
3262 ActionInfo[I].SavedOffloadAction.end());
3265 /// Functions that attempt to perform the combining. They detect if that is
3266 /// legal, and if so they update the inputs \a Inputs and the offload action
3267 /// that were collapsed in \a CollapsedOffloadAction. A tool that deals with
3268 /// the combined action is returned. If the combining is not legal or if the
3269 /// tool does not exist, null is returned.
3270 /// Currently three kinds of collapsing are supported:
3271 /// - Assemble + Backend + Compile;
3272 /// - Assemble + Backend ;
3273 /// - Backend + Compile.
3275 combineAssembleBackendCompile(ArrayRef<JobActionInfo> ActionInfo,
3276 const ActionList *&Inputs,
3277 ActionList &CollapsedOffloadAction) {
3278 if (ActionInfo.size() < 3 || !canCollapseAssembleAction())
3280 auto *AJ = dyn_cast<AssembleJobAction>(ActionInfo[0].JA);
3281 auto *BJ = dyn_cast<BackendJobAction>(ActionInfo[1].JA);
3282 auto *CJ = dyn_cast<CompileJobAction>(ActionInfo[2].JA);
3283 if (!AJ || !BJ || !CJ)
3286 // Get compiler tool.
3287 const Tool *T = TC.SelectTool(*CJ);
3291 // When using -fembed-bitcode, it is required to have the same tool (clang)
3292 // for both CompilerJA and BackendJA. Otherwise, combine two stages.
3294 const Tool *BT = TC.SelectTool(*BJ);
3299 if (!T->hasIntegratedAssembler())
3302 Inputs = &CJ->getInputs();
3303 AppendCollapsedOffloadAction(CollapsedOffloadAction, ActionInfo,
3307 const Tool *combineAssembleBackend(ArrayRef<JobActionInfo> ActionInfo,
3308 const ActionList *&Inputs,
3309 ActionList &CollapsedOffloadAction) {
3310 if (ActionInfo.size() < 2 || !canCollapseAssembleAction())
3312 auto *AJ = dyn_cast<AssembleJobAction>(ActionInfo[0].JA);
3313 auto *BJ = dyn_cast<BackendJobAction>(ActionInfo[1].JA);
3317 // Retrieve the compile job, backend action must always be preceded by one.
3318 ActionList CompileJobOffloadActions;
3319 auto *CJ = getPrevDependentAction(BJ->getInputs(), CompileJobOffloadActions,
3320 /*CanBeCollapsed=*/false);
3321 if (!AJ || !BJ || !CJ)
3324 assert(isa<CompileJobAction>(CJ) &&
3325 "Expecting compile job preceding backend job.");
3327 // Get compiler tool.
3328 const Tool *T = TC.SelectTool(*CJ);
3332 if (!T->hasIntegratedAssembler())
3335 Inputs = &BJ->getInputs();
3336 AppendCollapsedOffloadAction(CollapsedOffloadAction, ActionInfo,
3340 const Tool *combineBackendCompile(ArrayRef<JobActionInfo> ActionInfo,
3341 const ActionList *&Inputs,
3342 ActionList &CollapsedOffloadAction) {
3343 if (ActionInfo.size() < 2 || !canCollapsePreprocessorAction())
3345 auto *BJ = dyn_cast<BackendJobAction>(ActionInfo[0].JA);
3346 auto *CJ = dyn_cast<CompileJobAction>(ActionInfo[1].JA);
3350 // Get compiler tool.
3351 const Tool *T = TC.SelectTool(*CJ);
3355 if (T->canEmitIR() && (SaveTemps || EmbedBitcode))
3358 Inputs = &CJ->getInputs();
3359 AppendCollapsedOffloadAction(CollapsedOffloadAction, ActionInfo,
3364 /// Updates the inputs if the obtained tool supports combining with
3365 /// preprocessor action, and the current input is indeed a preprocessor
3366 /// action. If combining results in the collapse of offloading actions, those
3367 /// are appended to \a CollapsedOffloadAction.
3368 void combineWithPreprocessor(const Tool *T, const ActionList *&Inputs,
3369 ActionList &CollapsedOffloadAction) {
3370 if (!T || !canCollapsePreprocessorAction() || !T->hasIntegratedCPP())
3373 // Attempt to get a preprocessor action dependence.
3374 ActionList PreprocessJobOffloadActions;
3375 auto *PJ = getPrevDependentAction(*Inputs, PreprocessJobOffloadActions);
3376 if (!PJ || !isa<PreprocessJobAction>(PJ))
3379 // This is legal to combine. Append any offload action we found and set the
3380 // current inputs to preprocessor inputs.
3381 CollapsedOffloadAction.append(PreprocessJobOffloadActions.begin(),
3382 PreprocessJobOffloadActions.end());
3383 Inputs = &PJ->getInputs();
3387 ToolSelector(const JobAction *BaseAction, const ToolChain &TC,
3388 const Compilation &C, bool SaveTemps, bool EmbedBitcode)
3389 : TC(TC), C(C), BaseAction(BaseAction), SaveTemps(SaveTemps),
3390 EmbedBitcode(EmbedBitcode) {
3391 assert(BaseAction && "Invalid base action.");
3392 IsHostSelector = BaseAction->getOffloadingDeviceKind() == Action::OFK_None;
3395 /// Check if a chain of actions can be combined and return the tool that can
3396 /// handle the combination of actions. The pointer to the current inputs \a
3397 /// Inputs and the list of offload actions \a CollapsedOffloadActions
3398 /// connected to collapsed actions are updated accordingly. The latter enables
3399 /// the caller of the selector to process them afterwards instead of just
3400 /// dropping them. If no suitable tool is found, null will be returned.
3401 const Tool *getTool(const ActionList *&Inputs,
3402 ActionList &CollapsedOffloadAction) {
3404 // Get the largest chain of actions that we could combine.
3407 SmallVector<JobActionInfo, 5> ActionChain(1);
3408 ActionChain.back().JA = BaseAction;
3409 while (ActionChain.back().JA) {
3410 const Action *CurAction = ActionChain.back().JA;
3412 // Grow the chain by one element.
3413 ActionChain.resize(ActionChain.size() + 1);
3414 JobActionInfo &AI = ActionChain.back();
3416 // Attempt to fill it with the
3418 getPrevDependentAction(CurAction->getInputs(), AI.SavedOffloadAction);
3421 // Pop the last action info as it could not be filled.
3422 ActionChain.pop_back();
3425 // Attempt to combine actions. If all combining attempts failed, just return
3426 // the tool of the provided action. At the end we attempt to combine the
3427 // action with any preprocessor action it may depend on.
3430 const Tool *T = combineAssembleBackendCompile(ActionChain, Inputs,
3431 CollapsedOffloadAction);
3433 T = combineAssembleBackend(ActionChain, Inputs, CollapsedOffloadAction);
3435 T = combineBackendCompile(ActionChain, Inputs, CollapsedOffloadAction);
3437 Inputs = &BaseAction->getInputs();
3438 T = TC.SelectTool(*BaseAction);
3441 combineWithPreprocessor(T, Inputs, CollapsedOffloadAction);
3447 /// Return a string that uniquely identifies the result of a job. The bound arch
3448 /// is not necessarily represented in the toolchain's triple -- for example,
3449 /// armv7 and armv7s both map to the same triple -- so we need both in our map.
3450 /// Also, we need to add the offloading device kind, as the same tool chain can
3451 /// be used for host and device for some programming models, e.g. OpenMP.
3452 static std::string GetTriplePlusArchString(const ToolChain *TC,
3453 StringRef BoundArch,
3454 Action::OffloadKind OffloadKind) {
3455 std::string TriplePlusArch = TC->getTriple().normalize();
3456 if (!BoundArch.empty()) {
3457 TriplePlusArch += "-";
3458 TriplePlusArch += BoundArch;
3460 TriplePlusArch += "-";
3461 TriplePlusArch += Action::GetOffloadKindName(OffloadKind);
3462 return TriplePlusArch;
3465 InputInfo Driver::BuildJobsForAction(
3466 Compilation &C, const Action *A, const ToolChain *TC, StringRef BoundArch,
3467 bool AtTopLevel, bool MultipleArchs, const char *LinkingOutput,
3468 std::map<std::pair<const Action *, std::string>, InputInfo> &CachedResults,
3469 Action::OffloadKind TargetDeviceOffloadKind) const {
3470 std::pair<const Action *, std::string> ActionTC = {
3471 A, GetTriplePlusArchString(TC, BoundArch, TargetDeviceOffloadKind)};
3472 auto CachedResult = CachedResults.find(ActionTC);
3473 if (CachedResult != CachedResults.end()) {
3474 return CachedResult->second;
3476 InputInfo Result = BuildJobsForActionNoCache(
3477 C, A, TC, BoundArch, AtTopLevel, MultipleArchs, LinkingOutput,
3478 CachedResults, TargetDeviceOffloadKind);
3479 CachedResults[ActionTC] = Result;
3483 InputInfo Driver::BuildJobsForActionNoCache(
3484 Compilation &C, const Action *A, const ToolChain *TC, StringRef BoundArch,
3485 bool AtTopLevel, bool MultipleArchs, const char *LinkingOutput,
3486 std::map<std::pair<const Action *, std::string>, InputInfo> &CachedResults,
3487 Action::OffloadKind TargetDeviceOffloadKind) const {
3488 llvm::PrettyStackTraceString CrashInfo("Building compilation jobs");
3490 InputInfoList OffloadDependencesInputInfo;
3491 bool BuildingForOffloadDevice = TargetDeviceOffloadKind != Action::OFK_None;
3492 if (const OffloadAction *OA = dyn_cast<OffloadAction>(A)) {
3493 // The 'Darwin' toolchain is initialized only when its arguments are
3494 // computed. Get the default arguments for OFK_None to ensure that
3495 // initialization is performed before processing the offload action.
3496 // FIXME: Remove when darwin's toolchain is initialized during construction.
3497 C.getArgsForToolChain(TC, BoundArch, Action::OFK_None);
3499 // The offload action is expected to be used in four different situations.
3501 // a) Set a toolchain/architecture/kind for a host action:
3502 // Host Action 1 -> OffloadAction -> Host Action 2
3504 // b) Set a toolchain/architecture/kind for a device action;
3505 // Device Action 1 -> OffloadAction -> Device Action 2
3507 // c) Specify a device dependence to a host action;
3508 // Device Action 1 _
3510 // Host Action 1 ---> OffloadAction -> Host Action 2
3512 // d) Specify a host dependence to a device action.
3515 // Device Action 1 ---> OffloadAction -> Device Action 2
3517 // For a) and b), we just return the job generated for the dependence. For
3518 // c) and d) we override the current action with the host/device dependence
3519 // if the current toolchain is host/device and set the offload dependences
3520 // info with the jobs obtained from the device/host dependence(s).
3522 // If there is a single device option, just generate the job for it.
3523 if (OA->hasSingleDeviceDependence()) {
3525 OA->doOnEachDeviceDependence([&](Action *DepA, const ToolChain *DepTC,
3526 const char *DepBoundArch) {
3528 BuildJobsForAction(C, DepA, DepTC, DepBoundArch, AtTopLevel,
3529 /*MultipleArchs*/ !!DepBoundArch, LinkingOutput,
3530 CachedResults, DepA->getOffloadingDeviceKind());
3535 // If 'Action 2' is host, we generate jobs for the device dependences and
3536 // override the current action with the host dependence. Otherwise, we
3537 // generate the host dependences and override the action with the device
3538 // dependence. The dependences can't therefore be a top-level action.
3539 OA->doOnEachDependence(
3540 /*IsHostDependence=*/BuildingForOffloadDevice,
3541 [&](Action *DepA, const ToolChain *DepTC, const char *DepBoundArch) {
3542 OffloadDependencesInputInfo.push_back(BuildJobsForAction(
3543 C, DepA, DepTC, DepBoundArch, /*AtTopLevel=*/false,
3544 /*MultipleArchs*/ !!DepBoundArch, LinkingOutput, CachedResults,
3545 DepA->getOffloadingDeviceKind()));
3548 A = BuildingForOffloadDevice
3549 ? OA->getSingleDeviceDependence(/*DoNotConsiderHostActions=*/true)
3550 : OA->getHostDependence();
3553 if (const InputAction *IA = dyn_cast<InputAction>(A)) {
3554 // FIXME: It would be nice to not claim this here; maybe the old scheme of
3555 // just using Args was better?
3556 const Arg &Input = IA->getInputArg();
3558 if (Input.getOption().matches(options::OPT_INPUT)) {
3559 const char *Name = Input.getValue();
3560 return InputInfo(A, Name, /* BaseInput = */ Name);
3562 return InputInfo(A, &Input, /* BaseInput = */ "");
3565 if (const BindArchAction *BAA = dyn_cast<BindArchAction>(A)) {
3566 const ToolChain *TC;
3567 StringRef ArchName = BAA->getArchName();
3569 if (!ArchName.empty())
3570 TC = &getToolChain(C.getArgs(),
3571 computeTargetTriple(*this, DefaultTargetTriple,
3572 C.getArgs(), ArchName));
3574 TC = &C.getDefaultToolChain();
3576 return BuildJobsForAction(C, *BAA->input_begin(), TC, ArchName, AtTopLevel,
3577 MultipleArchs, LinkingOutput, CachedResults,
3578 TargetDeviceOffloadKind);
3582 const ActionList *Inputs = &A->getInputs();
3584 const JobAction *JA = cast<JobAction>(A);
3585 ActionList CollapsedOffloadActions;
3587 ToolSelector TS(JA, *TC, C, isSaveTempsEnabled(),
3588 embedBitcodeInObject() && !isUsingLTO());
3589 const Tool *T = TS.getTool(Inputs, CollapsedOffloadActions);
3594 // If we've collapsed action list that contained OffloadAction we
3595 // need to build jobs for host/device-side inputs it may have held.
3596 for (const auto *OA : CollapsedOffloadActions)
3597 cast<OffloadAction>(OA)->doOnEachDependence(
3598 /*IsHostDependence=*/BuildingForOffloadDevice,
3599 [&](Action *DepA, const ToolChain *DepTC, const char *DepBoundArch) {
3600 OffloadDependencesInputInfo.push_back(BuildJobsForAction(
3601 C, DepA, DepTC, DepBoundArch, /* AtTopLevel */ false,
3602 /*MultipleArchs=*/!!DepBoundArch, LinkingOutput, CachedResults,
3603 DepA->getOffloadingDeviceKind()));
3606 // Only use pipes when there is exactly one input.
3607 InputInfoList InputInfos;
3608 for (const Action *Input : *Inputs) {
3609 // Treat dsymutil and verify sub-jobs as being at the top-level too, they
3610 // shouldn't get temporary output names.
3611 // FIXME: Clean this up.
3612 bool SubJobAtTopLevel =
3613 AtTopLevel && (isa<DsymutilJobAction>(A) || isa<VerifyJobAction>(A));
3614 InputInfos.push_back(BuildJobsForAction(
3615 C, Input, TC, BoundArch, SubJobAtTopLevel, MultipleArchs, LinkingOutput,
3616 CachedResults, A->getOffloadingDeviceKind()));
3619 // Always use the first input as the base input.
3620 const char *BaseInput = InputInfos[0].getBaseInput();
3622 // ... except dsymutil actions, which use their actual input as the base
3624 if (JA->getType() == types::TY_dSYM)
3625 BaseInput = InputInfos[0].getFilename();
3627 // Append outputs of offload device jobs to the input list
3628 if (!OffloadDependencesInputInfo.empty())
3629 InputInfos.append(OffloadDependencesInputInfo.begin(),
3630 OffloadDependencesInputInfo.end());
3632 // Set the effective triple of the toolchain for the duration of this job.
3633 llvm::Triple EffectiveTriple;
3634 const ToolChain &ToolTC = T->getToolChain();
3635 const ArgList &Args =
3636 C.getArgsForToolChain(TC, BoundArch, A->getOffloadingDeviceKind());
3637 if (InputInfos.size() != 1) {
3638 EffectiveTriple = llvm::Triple(ToolTC.ComputeEffectiveClangTriple(Args));
3640 // Pass along the input type if it can be unambiguously determined.
3641 EffectiveTriple = llvm::Triple(
3642 ToolTC.ComputeEffectiveClangTriple(Args, InputInfos[0].getType()));
3644 RegisterEffectiveTriple TripleRAII(ToolTC, EffectiveTriple);
3646 // Determine the place to write output to, if any.
3648 InputInfoList UnbundlingResults;
3649 if (auto *UA = dyn_cast<OffloadUnbundlingJobAction>(JA)) {
3650 // If we have an unbundling job, we need to create results for all the
3651 // outputs. We also update the results cache so that other actions using
3652 // this unbundling action can get the right results.
3653 for (auto &UI : UA->getDependentActionsInfo()) {
3654 assert(UI.DependentOffloadKind != Action::OFK_None &&
3655 "Unbundling with no offloading??");
3657 // Unbundling actions are never at the top level. When we generate the
3658 // offloading prefix, we also do that for the host file because the
3659 // unbundling action does not change the type of the output which can
3660 // cause a overwrite.
3661 std::string OffloadingPrefix = Action::GetOffloadingFileNamePrefix(
3662 UI.DependentOffloadKind,
3663 UI.DependentToolChain->getTriple().normalize(),
3664 /*CreatePrefixForHost=*/true);
3665 auto CurI = InputInfo(
3666 UA, GetNamedOutputPath(C, *UA, BaseInput, UI.DependentBoundArch,
3667 /*AtTopLevel=*/false, MultipleArchs,
3670 // Save the unbundling result.
3671 UnbundlingResults.push_back(CurI);
3673 // Get the unique string identifier for this dependence and cache the
3675 CachedResults[{A, GetTriplePlusArchString(
3676 UI.DependentToolChain, BoundArch,
3677 UI.DependentOffloadKind)}] = CurI;
3680 // Now that we have all the results generated, select the one that should be
3681 // returned for the current depending action.
3682 std::pair<const Action *, std::string> ActionTC = {
3683 A, GetTriplePlusArchString(TC, BoundArch, TargetDeviceOffloadKind)};
3684 assert(CachedResults.find(ActionTC) != CachedResults.end() &&
3685 "Result does not exist??");
3686 Result = CachedResults[ActionTC];
3687 } else if (JA->getType() == types::TY_Nothing)
3688 Result = InputInfo(A, BaseInput);
3690 // We only have to generate a prefix for the host if this is not a top-level
3692 std::string OffloadingPrefix = Action::GetOffloadingFileNamePrefix(
3693 A->getOffloadingDeviceKind(), TC->getTriple().normalize(),
3694 /*CreatePrefixForHost=*/!!A->getOffloadingHostActiveKinds() &&
3696 Result = InputInfo(A, GetNamedOutputPath(C, *JA, BaseInput, BoundArch,
3697 AtTopLevel, MultipleArchs,
3702 if (CCCPrintBindings && !CCGenDiagnostics) {
3703 llvm::errs() << "# \"" << T->getToolChain().getTripleString() << '"'
3704 << " - \"" << T->getName() << "\", inputs: [";
3705 for (unsigned i = 0, e = InputInfos.size(); i != e; ++i) {
3706 llvm::errs() << InputInfos[i].getAsString();
3708 llvm::errs() << ", ";
3710 if (UnbundlingResults.empty())
3711 llvm::errs() << "], output: " << Result.getAsString() << "\n";
3713 llvm::errs() << "], outputs: [";
3714 for (unsigned i = 0, e = UnbundlingResults.size(); i != e; ++i) {
3715 llvm::errs() << UnbundlingResults[i].getAsString();
3717 llvm::errs() << ", ";
3719 llvm::errs() << "] \n";
3722 if (UnbundlingResults.empty())
3724 C, *JA, Result, InputInfos,
3725 C.getArgsForToolChain(TC, BoundArch, JA->getOffloadingDeviceKind()),
3728 T->ConstructJobMultipleOutputs(
3729 C, *JA, UnbundlingResults, InputInfos,
3730 C.getArgsForToolChain(TC, BoundArch, JA->getOffloadingDeviceKind()),
3736 const char *Driver::getDefaultImageName() const {
3737 llvm::Triple Target(llvm::Triple::normalize(DefaultTargetTriple));
3738 return Target.isOSWindows() ? "a.exe" : "a.out";
3741 /// \brief Create output filename based on ArgValue, which could either be a
3742 /// full filename, filename without extension, or a directory. If ArgValue
3743 /// does not provide a filename, then use BaseName, and use the extension
3744 /// suitable for FileType.
3745 static const char *MakeCLOutputFilename(const ArgList &Args, StringRef ArgValue,
3747 types::ID FileType) {
3748 SmallString<128> Filename = ArgValue;
3750 if (ArgValue.empty()) {
3751 // If the argument is empty, output to BaseName in the current dir.
3752 Filename = BaseName;
3753 } else if (llvm::sys::path::is_separator(Filename.back())) {
3754 // If the argument is a directory, output to BaseName in that dir.
3755 llvm::sys::path::append(Filename, BaseName);
3758 if (!llvm::sys::path::has_extension(ArgValue)) {
3759 // If the argument didn't provide an extension, then set it.
3760 const char *Extension = types::getTypeTempSuffix(FileType, true);
3762 if (FileType == types::TY_Image &&
3763 Args.hasArg(options::OPT__SLASH_LD, options::OPT__SLASH_LDd)) {
3764 // The output file is a dll.
3768 llvm::sys::path::replace_extension(Filename, Extension);
3771 return Args.MakeArgString(Filename.c_str());
3774 const char *Driver::GetNamedOutputPath(Compilation &C, const JobAction &JA,
3775 const char *BaseInput,
3776 StringRef BoundArch, bool AtTopLevel,
3778 StringRef OffloadingPrefix) const {
3779 llvm::PrettyStackTraceString CrashInfo("Computing output path");
3780 // Output to a user requested destination?
3781 if (AtTopLevel && !isa<DsymutilJobAction>(JA) && !isa<VerifyJobAction>(JA)) {
3782 if (Arg *FinalOutput = C.getArgs().getLastArg(options::OPT_o))
3783 return C.addResultFile(FinalOutput->getValue(), &JA);
3786 // For /P, preprocess to file named after BaseInput.
3787 if (C.getArgs().hasArg(options::OPT__SLASH_P)) {
3788 assert(AtTopLevel && isa<PreprocessJobAction>(JA));
3789 StringRef BaseName = llvm::sys::path::filename(BaseInput);
3791 if (Arg *A = C.getArgs().getLastArg(options::OPT__SLASH_Fi))
3792 NameArg = A->getValue();
3793 return C.addResultFile(
3794 MakeCLOutputFilename(C.getArgs(), NameArg, BaseName, types::TY_PP_C),
3798 // Default to writing to stdout?
3799 if (AtTopLevel && !CCGenDiagnostics &&
3800 (isa<PreprocessJobAction>(JA) || JA.getType() == types::TY_ModuleFile))
3803 // Is this the assembly listing for /FA?
3804 if (JA.getType() == types::TY_PP_Asm &&
3805 (C.getArgs().hasArg(options::OPT__SLASH_FA) ||
3806 C.getArgs().hasArg(options::OPT__SLASH_Fa))) {
3807 // Use /Fa and the input filename to determine the asm file name.
3808 StringRef BaseName = llvm::sys::path::filename(BaseInput);
3809 StringRef FaValue = C.getArgs().getLastArgValue(options::OPT__SLASH_Fa);
3810 return C.addResultFile(
3811 MakeCLOutputFilename(C.getArgs(), FaValue, BaseName, JA.getType()),
3815 // Output to a temporary file?
3816 if ((!AtTopLevel && !isSaveTempsEnabled() &&
3817 !C.getArgs().hasArg(options::OPT__SLASH_Fo)) ||
3819 StringRef Name = llvm::sys::path::filename(BaseInput);
3820 std::pair<StringRef, StringRef> Split = Name.split('.');
3821 std::string TmpName = GetTemporaryPath(
3822 Split.first, types::getTypeTempSuffix(JA.getType(), IsCLMode()));
3823 return C.addTempFile(C.getArgs().MakeArgString(TmpName));
3826 SmallString<128> BasePath(BaseInput);
3829 // Dsymutil actions should use the full path.
3830 if (isa<DsymutilJobAction>(JA) || isa<VerifyJobAction>(JA))
3831 BaseName = BasePath;
3833 BaseName = llvm::sys::path::filename(BasePath);
3835 // Determine what the derived output name should be.
3836 const char *NamedOutput;
3838 if ((JA.getType() == types::TY_Object || JA.getType() == types::TY_LTO_BC) &&
3839 C.getArgs().hasArg(options::OPT__SLASH_Fo, options::OPT__SLASH_o)) {
3840 // The /Fo or /o flag decides the object filename.
3843 .getLastArg(options::OPT__SLASH_Fo, options::OPT__SLASH_o)
3846 MakeCLOutputFilename(C.getArgs(), Val, BaseName, types::TY_Object);
3847 } else if (JA.getType() == types::TY_Image &&
3848 C.getArgs().hasArg(options::OPT__SLASH_Fe,
3849 options::OPT__SLASH_o)) {
3850 // The /Fe or /o flag names the linked file.
3853 .getLastArg(options::OPT__SLASH_Fe, options::OPT__SLASH_o)
3856 MakeCLOutputFilename(C.getArgs(), Val, BaseName, types::TY_Image);
3857 } else if (JA.getType() == types::TY_Image) {
3859 // clang-cl uses BaseName for the executable name.
3861 MakeCLOutputFilename(C.getArgs(), "", BaseName, types::TY_Image);
3863 SmallString<128> Output(getDefaultImageName());
3864 Output += OffloadingPrefix;
3865 if (MultipleArchs && !BoundArch.empty()) {
3867 Output.append(BoundArch);
3869 NamedOutput = C.getArgs().MakeArgString(Output.c_str());
3871 } else if (JA.getType() == types::TY_PCH && IsCLMode()) {
3872 NamedOutput = C.getArgs().MakeArgString(GetClPchPath(C, BaseName));
3874 const char *Suffix = types::getTypeTempSuffix(JA.getType(), IsCLMode());
3875 assert(Suffix && "All types used for output should have a suffix.");
3877 std::string::size_type End = std::string::npos;
3878 if (!types::appendSuffixForType(JA.getType()))
3879 End = BaseName.rfind('.');
3880 SmallString<128> Suffixed(BaseName.substr(0, End));
3881 Suffixed += OffloadingPrefix;
3882 if (MultipleArchs && !BoundArch.empty()) {
3884 Suffixed.append(BoundArch);
3886 // When using both -save-temps and -emit-llvm, use a ".tmp.bc" suffix for
3887 // the unoptimized bitcode so that it does not get overwritten by the ".bc"
3888 // optimized bitcode output.
3889 if (!AtTopLevel && C.getArgs().hasArg(options::OPT_emit_llvm) &&
3890 JA.getType() == types::TY_LLVM_BC)
3894 NamedOutput = C.getArgs().MakeArgString(Suffixed.c_str());
3897 // Prepend object file path if -save-temps=obj
3898 if (!AtTopLevel && isSaveTempsObj() && C.getArgs().hasArg(options::OPT_o) &&
3899 JA.getType() != types::TY_PCH) {
3900 Arg *FinalOutput = C.getArgs().getLastArg(options::OPT_o);
3901 SmallString<128> TempPath(FinalOutput->getValue());
3902 llvm::sys::path::remove_filename(TempPath);
3903 StringRef OutputFileName = llvm::sys::path::filename(NamedOutput);
3904 llvm::sys::path::append(TempPath, OutputFileName);
3905 NamedOutput = C.getArgs().MakeArgString(TempPath.c_str());
3908 // If we're saving temps and the temp file conflicts with the input file,
3909 // then avoid overwriting input file.
3910 if (!AtTopLevel && isSaveTempsEnabled() && NamedOutput == BaseName) {
3911 bool SameFile = false;
3912 SmallString<256> Result;
3913 llvm::sys::fs::current_path(Result);
3914 llvm::sys::path::append(Result, BaseName);
3915 llvm::sys::fs::equivalent(BaseInput, Result.c_str(), SameFile);
3916 // Must share the same path to conflict.
3918 StringRef Name = llvm::sys::path::filename(BaseInput);
3919 std::pair<StringRef, StringRef> Split = Name.split('.');
3920 std::string TmpName = GetTemporaryPath(
3921 Split.first, types::getTypeTempSuffix(JA.getType(), IsCLMode()));
3922 return C.addTempFile(C.getArgs().MakeArgString(TmpName));
3926 // As an annoying special case, PCH generation doesn't strip the pathname.
3927 if (JA.getType() == types::TY_PCH && !IsCLMode()) {
3928 llvm::sys::path::remove_filename(BasePath);
3929 if (BasePath.empty())
3930 BasePath = NamedOutput;
3932 llvm::sys::path::append(BasePath, NamedOutput);
3933 return C.addResultFile(C.getArgs().MakeArgString(BasePath.c_str()), &JA);
3935 return C.addResultFile(NamedOutput, &JA);
3939 std::string Driver::GetFilePath(StringRef Name, const ToolChain &TC) const {
3940 // Respect a limited subset of the '-Bprefix' functionality in GCC by
3941 // attempting to use this prefix when looking for file paths.
3942 for (const std::string &Dir : PrefixDirs) {
3945 SmallString<128> P(Dir[0] == '=' ? SysRoot + Dir.substr(1) : Dir);
3946 llvm::sys::path::append(P, Name);
3947 if (llvm::sys::fs::exists(Twine(P)))
3951 SmallString<128> R(ResourceDir);
3952 llvm::sys::path::append(R, Name);
3953 if (llvm::sys::fs::exists(Twine(R)))
3956 SmallString<128> P(TC.getCompilerRTPath());
3957 llvm::sys::path::append(P, Name);
3958 if (llvm::sys::fs::exists(Twine(P)))
3961 for (const std::string &Dir : TC.getFilePaths()) {
3964 SmallString<128> P(Dir[0] == '=' ? SysRoot + Dir.substr(1) : Dir);
3965 llvm::sys::path::append(P, Name);
3966 if (llvm::sys::fs::exists(Twine(P)))
3973 void Driver::generatePrefixedToolNames(
3974 StringRef Tool, const ToolChain &TC,
3975 SmallVectorImpl<std::string> &Names) const {
3976 // FIXME: Needs a better variable than DefaultTargetTriple
3977 Names.emplace_back((DefaultTargetTriple + "-" + Tool).str());
3978 Names.emplace_back(Tool);
3980 // Allow the discovery of tools prefixed with LLVM's default target triple.
3981 std::string LLVMDefaultTargetTriple = llvm::sys::getDefaultTargetTriple();
3982 if (LLVMDefaultTargetTriple != DefaultTargetTriple)
3983 Names.emplace_back((LLVMDefaultTargetTriple + "-" + Tool).str());
3986 static bool ScanDirForExecutable(SmallString<128> &Dir,
3987 ArrayRef<std::string> Names) {
3988 for (const auto &Name : Names) {
3989 llvm::sys::path::append(Dir, Name);
3990 if (llvm::sys::fs::can_execute(Twine(Dir)))
3992 llvm::sys::path::remove_filename(Dir);
3997 std::string Driver::GetProgramPath(StringRef Name, const ToolChain &TC) const {
3998 SmallVector<std::string, 2> TargetSpecificExecutables;
3999 generatePrefixedToolNames(Name, TC, TargetSpecificExecutables);
4001 // Respect a limited subset of the '-Bprefix' functionality in GCC by
4002 // attempting to use this prefix when looking for program paths.
4003 for (const auto &PrefixDir : PrefixDirs) {
4004 if (llvm::sys::fs::is_directory(PrefixDir)) {
4005 SmallString<128> P(PrefixDir);
4006 if (ScanDirForExecutable(P, TargetSpecificExecutables))
4009 SmallString<128> P((PrefixDir + Name).str());
4010 if (llvm::sys::fs::can_execute(Twine(P)))
4015 const ToolChain::path_list &List = TC.getProgramPaths();
4016 for (const auto &Path : List) {
4017 SmallString<128> P(Path);
4018 if (ScanDirForExecutable(P, TargetSpecificExecutables))
4022 // If all else failed, search the path.
4023 for (const auto &TargetSpecificExecutable : TargetSpecificExecutables)
4024 if (llvm::ErrorOr<std::string> P =
4025 llvm::sys::findProgramByName(TargetSpecificExecutable))
4031 std::string Driver::GetTemporaryPath(StringRef Prefix, StringRef Suffix) const {
4032 SmallString<128> Path;
4033 std::error_code EC = llvm::sys::fs::createTemporaryFile(Prefix, Suffix, Path);
4035 Diag(clang::diag::err_unable_to_make_temp) << EC.message();
4042 std::string Driver::GetClPchPath(Compilation &C, StringRef BaseName) const {
4043 SmallString<128> Output;
4044 if (Arg *FpArg = C.getArgs().getLastArg(options::OPT__SLASH_Fp)) {
4045 // FIXME: If anybody needs it, implement this obscure rule:
4046 // "If you specify a directory without a file name, the default file name
4047 // is VCx0.pch., where x is the major version of Visual C++ in use."
4048 Output = FpArg->getValue();
4050 // "If you do not specify an extension as part of the path name, an
4051 // extension of .pch is assumed. "
4052 if (!llvm::sys::path::has_extension(Output))
4056 llvm::sys::path::replace_extension(Output, ".pch");
4058 return Output.str();
4061 const ToolChain &Driver::getToolChain(const ArgList &Args,
4062 const llvm::Triple &Target) const {
4064 auto &TC = ToolChains[Target.str()];
4066 switch (Target.getOS()) {
4067 case llvm::Triple::Haiku:
4068 TC = llvm::make_unique<toolchains::Haiku>(*this, Target, Args);
4070 case llvm::Triple::Ananas:
4071 TC = llvm::make_unique<toolchains::Ananas>(*this, Target, Args);
4073 case llvm::Triple::CloudABI:
4074 TC = llvm::make_unique<toolchains::CloudABI>(*this, Target, Args);
4076 case llvm::Triple::Darwin:
4077 case llvm::Triple::MacOSX:
4078 case llvm::Triple::IOS:
4079 case llvm::Triple::TvOS:
4080 case llvm::Triple::WatchOS:
4081 TC = llvm::make_unique<toolchains::DarwinClang>(*this, Target, Args);
4083 case llvm::Triple::DragonFly:
4084 TC = llvm::make_unique<toolchains::DragonFly>(*this, Target, Args);
4086 case llvm::Triple::OpenBSD:
4087 TC = llvm::make_unique<toolchains::OpenBSD>(*this, Target, Args);
4089 case llvm::Triple::NetBSD:
4090 TC = llvm::make_unique<toolchains::NetBSD>(*this, Target, Args);
4092 case llvm::Triple::FreeBSD:
4093 TC = llvm::make_unique<toolchains::FreeBSD>(*this, Target, Args);
4095 case llvm::Triple::Minix:
4096 TC = llvm::make_unique<toolchains::Minix>(*this, Target, Args);
4098 case llvm::Triple::Linux:
4099 case llvm::Triple::ELFIAMCU:
4100 if (Target.getArch() == llvm::Triple::hexagon)
4101 TC = llvm::make_unique<toolchains::HexagonToolChain>(*this, Target,
4103 else if ((Target.getVendor() == llvm::Triple::MipsTechnologies) &&
4104 !Target.hasEnvironment())
4105 TC = llvm::make_unique<toolchains::MipsLLVMToolChain>(*this, Target,
4108 TC = llvm::make_unique<toolchains::Linux>(*this, Target, Args);
4110 case llvm::Triple::NaCl:
4111 TC = llvm::make_unique<toolchains::NaClToolChain>(*this, Target, Args);
4113 case llvm::Triple::Fuchsia:
4114 TC = llvm::make_unique<toolchains::Fuchsia>(*this, Target, Args);
4116 case llvm::Triple::Solaris:
4117 TC = llvm::make_unique<toolchains::Solaris>(*this, Target, Args);
4119 case llvm::Triple::AMDHSA:
4120 TC = llvm::make_unique<toolchains::AMDGPUToolChain>(*this, Target, Args);
4122 case llvm::Triple::Win32:
4123 switch (Target.getEnvironment()) {
4125 if (Target.isOSBinFormatELF())
4126 TC = llvm::make_unique<toolchains::Generic_ELF>(*this, Target, Args);
4127 else if (Target.isOSBinFormatMachO())
4128 TC = llvm::make_unique<toolchains::MachO>(*this, Target, Args);
4130 TC = llvm::make_unique<toolchains::Generic_GCC>(*this, Target, Args);
4132 case llvm::Triple::GNU:
4133 TC = llvm::make_unique<toolchains::MinGW>(*this, Target, Args);
4135 case llvm::Triple::Itanium:
4136 TC = llvm::make_unique<toolchains::CrossWindowsToolChain>(*this, Target,
4139 case llvm::Triple::MSVC:
4140 case llvm::Triple::UnknownEnvironment:
4141 if (Args.getLastArgValue(options::OPT_fuse_ld_EQ)
4142 .startswith_lower("bfd"))
4143 TC = llvm::make_unique<toolchains::CrossWindowsToolChain>(
4144 *this, Target, Args);
4147 llvm::make_unique<toolchains::MSVCToolChain>(*this, Target, Args);
4151 case llvm::Triple::PS4:
4152 TC = llvm::make_unique<toolchains::PS4CPU>(*this, Target, Args);
4154 case llvm::Triple::Contiki:
4155 TC = llvm::make_unique<toolchains::Contiki>(*this, Target, Args);
4158 // Of these targets, Hexagon is the only one that might have
4159 // an OS of Linux, in which case it got handled above already.
4160 switch (Target.getArch()) {
4161 case llvm::Triple::tce:
4162 TC = llvm::make_unique<toolchains::TCEToolChain>(*this, Target, Args);
4164 case llvm::Triple::tcele:
4165 TC = llvm::make_unique<toolchains::TCELEToolChain>(*this, Target, Args);
4167 case llvm::Triple::hexagon:
4168 TC = llvm::make_unique<toolchains::HexagonToolChain>(*this, Target,
4171 case llvm::Triple::lanai:
4172 TC = llvm::make_unique<toolchains::LanaiToolChain>(*this, Target, Args);
4174 case llvm::Triple::xcore:
4175 TC = llvm::make_unique<toolchains::XCoreToolChain>(*this, Target, Args);
4177 case llvm::Triple::wasm32:
4178 case llvm::Triple::wasm64:
4179 TC = llvm::make_unique<toolchains::WebAssembly>(*this, Target, Args);
4181 case llvm::Triple::avr:
4182 TC = llvm::make_unique<toolchains::AVRToolChain>(*this, Target, Args);
4185 if (Target.getVendor() == llvm::Triple::Myriad)
4186 TC = llvm::make_unique<toolchains::MyriadToolChain>(*this, Target,
4188 else if (toolchains::BareMetal::handlesTarget(Target))
4189 TC = llvm::make_unique<toolchains::BareMetal>(*this, Target, Args);
4190 else if (Target.isOSBinFormatELF())
4191 TC = llvm::make_unique<toolchains::Generic_ELF>(*this, Target, Args);
4192 else if (Target.isOSBinFormatMachO())
4193 TC = llvm::make_unique<toolchains::MachO>(*this, Target, Args);
4195 TC = llvm::make_unique<toolchains::Generic_GCC>(*this, Target, Args);
4200 // Intentionally omitted from the switch above: llvm::Triple::CUDA. CUDA
4201 // compiles always need two toolchains, the CUDA toolchain and the host
4202 // toolchain. So the only valid way to create a CUDA toolchain is via
4203 // CreateOffloadingDeviceToolChains.
4208 bool Driver::ShouldUseClangCompiler(const JobAction &JA) const {
4209 // Say "no" if there is not exactly one input of a type clang understands.
4210 if (JA.size() != 1 ||
4211 !types::isAcceptedByClang((*JA.input_begin())->getType()))
4214 // And say "no" if this is not a kind of action clang understands.
4215 if (!isa<PreprocessJobAction>(JA) && !isa<PrecompileJobAction>(JA) &&
4216 !isa<CompileJobAction>(JA) && !isa<BackendJobAction>(JA))
4222 /// GetReleaseVersion - Parse (([0-9]+)(.([0-9]+)(.([0-9]+)?))?)? and return the
4223 /// grouped values as integers. Numbers which are not provided are set to 0.
4225 /// \return True if the entire string was parsed (9.2), or all groups were
4226 /// parsed (10.3.5extrastuff).
4227 bool Driver::GetReleaseVersion(StringRef Str, unsigned &Major, unsigned &Minor,
4228 unsigned &Micro, bool &HadExtra) {
4231 Major = Minor = Micro = 0;
4235 if (Str.consumeInteger(10, Major))
4242 Str = Str.drop_front(1);
4244 if (Str.consumeInteger(10, Minor))
4250 Str = Str.drop_front(1);
4252 if (Str.consumeInteger(10, Micro))
4259 /// Parse digits from a string \p Str and fulfill \p Digits with
4260 /// the parsed numbers. This method assumes that the max number of
4261 /// digits to look for is equal to Digits.size().
4263 /// \return True if the entire string was parsed and there are
4264 /// no extra characters remaining at the end.
4265 bool Driver::GetReleaseVersion(StringRef Str,
4266 MutableArrayRef<unsigned> Digits) {
4270 unsigned CurDigit = 0;
4271 while (CurDigit < Digits.size()) {
4273 if (Str.consumeInteger(10, Digit))
4275 Digits[CurDigit] = Digit;
4280 Str = Str.drop_front(1);
4284 // More digits than requested, bail out...
4288 std::pair<unsigned, unsigned> Driver::getIncludeExcludeOptionFlagMasks() const {
4289 unsigned IncludedFlagsBitmask = 0;
4290 unsigned ExcludedFlagsBitmask = options::NoDriverOption;
4292 if (Mode == CLMode) {
4293 // Include CL and Core options.
4294 IncludedFlagsBitmask |= options::CLOption;
4295 IncludedFlagsBitmask |= options::CoreOption;
4297 ExcludedFlagsBitmask |= options::CLOption;
4300 return std::make_pair(IncludedFlagsBitmask, ExcludedFlagsBitmask);
4303 bool clang::driver::isOptimizationLevelFast(const ArgList &Args) {
4304 return Args.hasFlag(options::OPT_Ofast, options::OPT_O_Group, false);