Bug Summary

File:tools/clang/lib/Driver/Driver.cpp
Warning:line 1377, column 17
Called C++ object pointer is null

Annotated Source Code

1//===--- Driver.cpp - Clang GCC Compatible Driver -------------------------===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
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/ErrorHandling.h"
66#include "llvm/Support/FileSystem.h"
67#include "llvm/Support/Path.h"
68#include "llvm/Support/PrettyStackTrace.h"
69#include "llvm/Support/Process.h"
70#include "llvm/Support/Program.h"
71#include "llvm/Support/TargetRegistry.h"
72#include "llvm/Support/raw_ostream.h"
73#include <map>
74#include <memory>
75#include <utility>
76#if LLVM_ON_UNIX1
77#include <unistd.h> // getpid
78#endif
79
80using namespace clang::driver;
81using namespace clang;
82using namespace llvm::opt;
83
84Driver::Driver(StringRef ClangExecutable, StringRef DefaultTargetTriple,
85 DiagnosticsEngine &Diags,
86 IntrusiveRefCntPtr<vfs::FileSystem> VFS)
87 : Opts(createDriverOptTable()), Diags(Diags), VFS(std::move(VFS)),
88 Mode(GCCMode), SaveTemps(SaveTempsNone), BitcodeEmbed(EmbedNone),
89 LTOMode(LTOK_None), ClangExecutable(ClangExecutable),
90 SysRoot(DEFAULT_SYSROOT""),
91 DriverTitle("clang LLVM compiler"), CCPrintOptionsFilename(nullptr),
92 CCPrintHeadersFilename(nullptr), CCLogDiagnosticsFilename(nullptr),
93 CCCPrintBindings(false), CCPrintHeaders(false), CCLogDiagnostics(false),
94 CCGenDiagnostics(false), DefaultTargetTriple(DefaultTargetTriple),
95 CCCGenericGCCName(""), CheckInputsExist(true), CCCUsePCH(true),
96 GenReproducer(false), SuppressMissingInputWarning(false) {
97
98 // Provide a sane fallback if no VFS is specified.
99 if (!this->VFS)
100 this->VFS = vfs::getRealFileSystem();
101
102 Name = llvm::sys::path::filename(ClangExecutable);
103 Dir = llvm::sys::path::parent_path(ClangExecutable);
104 InstalledDir = Dir; // Provide a sensible default installed dir.
105
106 // Compute the path to the resource directory.
107 StringRef ClangResourceDir(CLANG_RESOURCE_DIR"");
108 SmallString<128> P(Dir);
109 if (ClangResourceDir != "") {
110 llvm::sys::path::append(P, ClangResourceDir);
111 } else {
112 StringRef ClangLibdirSuffix(CLANG_LIBDIR_SUFFIX"");
113 P = llvm::sys::path::parent_path(Dir);
114 llvm::sys::path::append(P, Twine("lib") + ClangLibdirSuffix, "clang",
115 CLANG_VERSION_STRING"6.0.0");
116 }
117 ResourceDir = P.str();
118}
119
120void Driver::ParseDriverMode(StringRef ProgramName,
121 ArrayRef<const char *> Args) {
122 ClangNameParts = ToolChain::getTargetAndModeFromProgramName(ProgramName);
123 setDriverModeFromOption(ClangNameParts.DriverMode);
124
125 for (const char *ArgPtr : Args) {
126 // Ingore nullptrs, they are response file's EOL markers
127 if (ArgPtr == nullptr)
128 continue;
129 const StringRef Arg = ArgPtr;
130 setDriverModeFromOption(Arg);
131 }
132}
133
134void Driver::setDriverModeFromOption(StringRef Opt) {
135 const std::string OptName =
136 getOpts().getOption(options::OPT_driver_mode).getPrefixedName();
137 if (!Opt.startswith(OptName))
138 return;
139 StringRef Value = Opt.drop_front(OptName.size());
140
141 const unsigned M = llvm::StringSwitch<unsigned>(Value)
142 .Case("gcc", GCCMode)
143 .Case("g++", GXXMode)
144 .Case("cpp", CPPMode)
145 .Case("cl", CLMode)
146 .Default(~0U);
147
148 if (M != ~0U)
149 Mode = static_cast<DriverMode>(M);
150 else
151 Diag(diag::err_drv_unsupported_option_argument) << OptName << Value;
152}
153
154InputArgList Driver::ParseArgStrings(ArrayRef<const char *> ArgStrings,
155 bool &ContainsError) {
156 llvm::PrettyStackTraceString CrashInfo("Command line argument parsing");
157 ContainsError = false;
158
159 unsigned IncludedFlagsBitmask;
160 unsigned ExcludedFlagsBitmask;
161 std::tie(IncludedFlagsBitmask, ExcludedFlagsBitmask) =
162 getIncludeExcludeOptionFlagMasks();
163
164 unsigned MissingArgIndex, MissingArgCount;
165 InputArgList Args =
166 getOpts().ParseArgs(ArgStrings, MissingArgIndex, MissingArgCount,
167 IncludedFlagsBitmask, ExcludedFlagsBitmask);
168
169 // Check for missing argument error.
170 if (MissingArgCount) {
171 Diag(diag::err_drv_missing_argument)
172 << Args.getArgString(MissingArgIndex) << MissingArgCount;
173 ContainsError |=
174 Diags.getDiagnosticLevel(diag::err_drv_missing_argument,
175 SourceLocation()) > DiagnosticsEngine::Warning;
176 }
177
178 // Check for unsupported options.
179 for (const Arg *A : Args) {
180 if (A->getOption().hasFlag(options::Unsupported)) {
181 Diag(diag::err_drv_unsupported_opt) << A->getAsString(Args);
182 ContainsError |= Diags.getDiagnosticLevel(diag::err_drv_unsupported_opt,
183 SourceLocation()) >
184 DiagnosticsEngine::Warning;
185 continue;
186 }
187
188 // Warn about -mcpu= without an argument.
189 if (A->getOption().matches(options::OPT_mcpu_EQ) && A->containsValue("")) {
190 Diag(diag::warn_drv_empty_joined_argument) << A->getAsString(Args);
191 ContainsError |= Diags.getDiagnosticLevel(
192 diag::warn_drv_empty_joined_argument,
193 SourceLocation()) > DiagnosticsEngine::Warning;
194 }
195 }
196
197 for (const Arg *A : Args.filtered(options::OPT_UNKNOWN)) {
198 auto ID = IsCLMode() ? diag::warn_drv_unknown_argument_clang_cl
199 : diag::err_drv_unknown_argument;
200
201 Diags.Report(ID) << A->getAsString(Args);
202 ContainsError |= Diags.getDiagnosticLevel(ID, SourceLocation()) >
203 DiagnosticsEngine::Warning;
204 }
205
206 return Args;
207}
208
209// Determine which compilation mode we are in. We look for options which
210// affect the phase, starting with the earliest phases, and record which
211// option we used to determine the final phase.
212phases::ID Driver::getFinalPhase(const DerivedArgList &DAL,
213 Arg **FinalPhaseArg) const {
214 Arg *PhaseArg = nullptr;
215 phases::ID FinalPhase;
216
217 // -{E,EP,P,M,MM} only run the preprocessor.
218 if (CCCIsCPP() || (PhaseArg = DAL.getLastArg(options::OPT_E)) ||
219 (PhaseArg = DAL.getLastArg(options::OPT__SLASH_EP)) ||
220 (PhaseArg = DAL.getLastArg(options::OPT_M, options::OPT_MM)) ||
221 (PhaseArg = DAL.getLastArg(options::OPT__SLASH_P))) {
222 FinalPhase = phases::Preprocess;
223
224 // --precompile only runs up to precompilation.
225 } else if ((PhaseArg = DAL.getLastArg(options::OPT__precompile))) {
226 FinalPhase = phases::Precompile;
227
228 // -{fsyntax-only,-analyze,emit-ast} only run up to the compiler.
229 } else if ((PhaseArg = DAL.getLastArg(options::OPT_fsyntax_only)) ||
230 (PhaseArg = DAL.getLastArg(options::OPT_module_file_info)) ||
231 (PhaseArg = DAL.getLastArg(options::OPT_verify_pch)) ||
232 (PhaseArg = DAL.getLastArg(options::OPT_rewrite_objc)) ||
233 (PhaseArg = DAL.getLastArg(options::OPT_rewrite_legacy_objc)) ||
234 (PhaseArg = DAL.getLastArg(options::OPT__migrate)) ||
235 (PhaseArg = DAL.getLastArg(options::OPT__analyze,
236 options::OPT__analyze_auto)) ||
237 (PhaseArg = DAL.getLastArg(options::OPT_emit_ast))) {
238 FinalPhase = phases::Compile;
239
240 // -S only runs up to the backend.
241 } else if ((PhaseArg = DAL.getLastArg(options::OPT_S))) {
242 FinalPhase = phases::Backend;
243
244 // -c compilation only runs up to the assembler.
245 } else if ((PhaseArg = DAL.getLastArg(options::OPT_c))) {
246 FinalPhase = phases::Assemble;
247
248 // Otherwise do everything.
249 } else
250 FinalPhase = phases::Link;
251
252 if (FinalPhaseArg)
253 *FinalPhaseArg = PhaseArg;
254
255 return FinalPhase;
256}
257
258static Arg *MakeInputArg(DerivedArgList &Args, OptTable &Opts,
259 StringRef Value) {
260 Arg *A = new Arg(Opts.getOption(options::OPT_INPUT), Value,
261 Args.getBaseArgs().MakeIndex(Value), Value.data());
262 Args.AddSynthesizedArg(A);
263 A->claim();
264 return A;
265}
266
267DerivedArgList *Driver::TranslateInputArgs(const InputArgList &Args) const {
268 DerivedArgList *DAL = new DerivedArgList(Args);
269
270 bool HasNostdlib = Args.hasArg(options::OPT_nostdlib);
271 bool HasNodefaultlib = Args.hasArg(options::OPT_nodefaultlibs);
272 for (Arg *A : Args) {
273 // Unfortunately, we have to parse some forwarding options (-Xassembler,
274 // -Xlinker, -Xpreprocessor) because we either integrate their functionality
275 // (assembler and preprocessor), or bypass a previous driver ('collect2').
276
277 // Rewrite linker options, to replace --no-demangle with a custom internal
278 // option.
279 if ((A->getOption().matches(options::OPT_Wl_COMMA) ||
280 A->getOption().matches(options::OPT_Xlinker)) &&
281 A->containsValue("--no-demangle")) {
282 // Add the rewritten no-demangle argument.
283 DAL->AddFlagArg(A, Opts->getOption(options::OPT_Z_Xlinker__no_demangle));
284
285 // Add the remaining values as Xlinker arguments.
286 for (StringRef Val : A->getValues())
287 if (Val != "--no-demangle")
288 DAL->AddSeparateArg(A, Opts->getOption(options::OPT_Xlinker), Val);
289
290 continue;
291 }
292
293 // Rewrite preprocessor options, to replace -Wp,-MD,FOO which is used by
294 // some build systems. We don't try to be complete here because we don't
295 // care to encourage this usage model.
296 if (A->getOption().matches(options::OPT_Wp_COMMA) &&
297 (A->getValue(0) == StringRef("-MD") ||
298 A->getValue(0) == StringRef("-MMD"))) {
299 // Rewrite to -MD/-MMD along with -MF.
300 if (A->getValue(0) == StringRef("-MD"))
301 DAL->AddFlagArg(A, Opts->getOption(options::OPT_MD));
302 else
303 DAL->AddFlagArg(A, Opts->getOption(options::OPT_MMD));
304 if (A->getNumValues() == 2)
305 DAL->AddSeparateArg(A, Opts->getOption(options::OPT_MF),
306 A->getValue(1));
307 continue;
308 }
309
310 // Rewrite reserved library names.
311 if (A->getOption().matches(options::OPT_l)) {
312 StringRef Value = A->getValue();
313
314 // Rewrite unless -nostdlib is present.
315 if (!HasNostdlib && !HasNodefaultlib && Value == "stdc++") {
316 DAL->AddFlagArg(A, Opts->getOption(options::OPT_Z_reserved_lib_stdcxx));
317 continue;
318 }
319
320 // Rewrite unconditionally.
321 if (Value == "cc_kext") {
322 DAL->AddFlagArg(A, Opts->getOption(options::OPT_Z_reserved_lib_cckext));
323 continue;
324 }
325 }
326
327 // Pick up inputs via the -- option.
328 if (A->getOption().matches(options::OPT__DASH_DASH)) {
329 A->claim();
330 for (StringRef Val : A->getValues())
331 DAL->append(MakeInputArg(*DAL, *Opts, Val));
332 continue;
333 }
334
335 DAL->append(A);
336 }
337
338 // Enforce -static if -miamcu is present.
339 if (Args.hasFlag(options::OPT_miamcu, options::OPT_mno_iamcu, false))
340 DAL->AddFlagArg(0, Opts->getOption(options::OPT_static));
341
342// Add a default value of -mlinker-version=, if one was given and the user
343// didn't specify one.
344#if defined(HOST_LINK_VERSION)
345 if (!Args.hasArg(options::OPT_mlinker_version_EQ) &&
346 strlen(HOST_LINK_VERSION) > 0) {
347 DAL->AddJoinedArg(0, Opts->getOption(options::OPT_mlinker_version_EQ),
348 HOST_LINK_VERSION);
349 DAL->getLastArg(options::OPT_mlinker_version_EQ)->claim();
350 }
351#endif
352
353 return DAL;
354}
355
356/// \brief Compute target triple from args.
357///
358/// This routine provides the logic to compute a target triple from various
359/// args passed to the driver and the default triple string.
360static llvm::Triple computeTargetTriple(const Driver &D,
361 StringRef DefaultTargetTriple,
362 const ArgList &Args,
363 StringRef DarwinArchName = "") {
364 // FIXME: Already done in Compilation *Driver::BuildCompilation
365 if (const Arg *A = Args.getLastArg(options::OPT_target))
366 DefaultTargetTriple = A->getValue();
367
368 llvm::Triple Target(llvm::Triple::normalize(DefaultTargetTriple));
369
370 // Handle Apple-specific options available here.
371 if (Target.isOSBinFormatMachO()) {
372 // If an explict Darwin arch name is given, that trumps all.
373 if (!DarwinArchName.empty()) {
374 tools::darwin::setTripleTypeForMachOArchName(Target, DarwinArchName);
375 return Target;
376 }
377
378 // Handle the Darwin '-arch' flag.
379 if (Arg *A = Args.getLastArg(options::OPT_arch)) {
380 StringRef ArchName = A->getValue();
381 tools::darwin::setTripleTypeForMachOArchName(Target, ArchName);
382 }
383 }
384
385 // Handle pseudo-target flags '-mlittle-endian'/'-EL' and
386 // '-mbig-endian'/'-EB'.
387 if (Arg *A = Args.getLastArg(options::OPT_mlittle_endian,
388 options::OPT_mbig_endian)) {
389 if (A->getOption().matches(options::OPT_mlittle_endian)) {
390 llvm::Triple LE = Target.getLittleEndianArchVariant();
391 if (LE.getArch() != llvm::Triple::UnknownArch)
392 Target = std::move(LE);
393 } else {
394 llvm::Triple BE = Target.getBigEndianArchVariant();
395 if (BE.getArch() != llvm::Triple::UnknownArch)
396 Target = std::move(BE);
397 }
398 }
399
400 // Skip further flag support on OSes which don't support '-m32' or '-m64'.
401 if (Target.getArch() == llvm::Triple::tce ||
402 Target.getOS() == llvm::Triple::Minix)
403 return Target;
404
405 // Handle pseudo-target flags '-m64', '-mx32', '-m32' and '-m16'.
406 Arg *A = Args.getLastArg(options::OPT_m64, options::OPT_mx32,
407 options::OPT_m32, options::OPT_m16);
408 if (A) {
409 llvm::Triple::ArchType AT = llvm::Triple::UnknownArch;
410
411 if (A->getOption().matches(options::OPT_m64)) {
412 AT = Target.get64BitArchVariant().getArch();
413 if (Target.getEnvironment() == llvm::Triple::GNUX32)
414 Target.setEnvironment(llvm::Triple::GNU);
415 } else if (A->getOption().matches(options::OPT_mx32) &&
416 Target.get64BitArchVariant().getArch() == llvm::Triple::x86_64) {
417 AT = llvm::Triple::x86_64;
418 Target.setEnvironment(llvm::Triple::GNUX32);
419 } else if (A->getOption().matches(options::OPT_m32)) {
420 AT = Target.get32BitArchVariant().getArch();
421 if (Target.getEnvironment() == llvm::Triple::GNUX32)
422 Target.setEnvironment(llvm::Triple::GNU);
423 } else if (A->getOption().matches(options::OPT_m16) &&
424 Target.get32BitArchVariant().getArch() == llvm::Triple::x86) {
425 AT = llvm::Triple::x86;
426 Target.setEnvironment(llvm::Triple::CODE16);
427 }
428
429 if (AT != llvm::Triple::UnknownArch && AT != Target.getArch())
430 Target.setArch(AT);
431 }
432
433 // Handle -miamcu flag.
434 if (Args.hasFlag(options::OPT_miamcu, options::OPT_mno_iamcu, false)) {
435 if (Target.get32BitArchVariant().getArch() != llvm::Triple::x86)
436 D.Diag(diag::err_drv_unsupported_opt_for_target) << "-miamcu"
437 << Target.str();
438
439 if (A && !A->getOption().matches(options::OPT_m32))
440 D.Diag(diag::err_drv_argument_not_allowed_with)
441 << "-miamcu" << A->getBaseArg().getAsString(Args);
442
443 Target.setArch(llvm::Triple::x86);
444 Target.setArchName("i586");
445 Target.setEnvironment(llvm::Triple::UnknownEnvironment);
446 Target.setEnvironmentName("");
447 Target.setOS(llvm::Triple::ELFIAMCU);
448 Target.setVendor(llvm::Triple::UnknownVendor);
449 Target.setVendorName("intel");
450 }
451
452 return Target;
453}
454
455// \brief Parse the LTO options and record the type of LTO compilation
456// based on which -f(no-)?lto(=.*)? option occurs last.
457void Driver::setLTOMode(const llvm::opt::ArgList &Args) {
458 LTOMode = LTOK_None;
459 if (!Args.hasFlag(options::OPT_flto, options::OPT_flto_EQ,
460 options::OPT_fno_lto, false))
461 return;
462
463 StringRef LTOName("full");
464
465 const Arg *A = Args.getLastArg(options::OPT_flto_EQ);
466 if (A)
467 LTOName = A->getValue();
468
469 LTOMode = llvm::StringSwitch<LTOKind>(LTOName)
470 .Case("full", LTOK_Full)
471 .Case("thin", LTOK_Thin)
472 .Default(LTOK_Unknown);
473
474 if (LTOMode == LTOK_Unknown) {
475 assert(A)(static_cast <bool> (A) ? void (0) : __assert_fail ("A"
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 475, __extension__ __PRETTY_FUNCTION__))
;
476 Diag(diag::err_drv_unsupported_option_argument) << A->getOption().getName()
477 << A->getValue();
478 }
479}
480
481/// Compute the desired OpenMP runtime from the flags provided.
482Driver::OpenMPRuntimeKind Driver::getOpenMPRuntime(const ArgList &Args) const {
483 StringRef RuntimeName(CLANG_DEFAULT_OPENMP_RUNTIME"libomp");
484
485 const Arg *A = Args.getLastArg(options::OPT_fopenmp_EQ);
486 if (A)
487 RuntimeName = A->getValue();
488
489 auto RT = llvm::StringSwitch<OpenMPRuntimeKind>(RuntimeName)
490 .Case("libomp", OMPRT_OMP)
491 .Case("libgomp", OMPRT_GOMP)
492 .Case("libiomp5", OMPRT_IOMP5)
493 .Default(OMPRT_Unknown);
494
495 if (RT == OMPRT_Unknown) {
496 if (A)
497 Diag(diag::err_drv_unsupported_option_argument)
498 << A->getOption().getName() << A->getValue();
499 else
500 // FIXME: We could use a nicer diagnostic here.
501 Diag(diag::err_drv_unsupported_opt) << "-fopenmp";
502 }
503
504 return RT;
505}
506
507void Driver::CreateOffloadingDeviceToolChains(Compilation &C,
508 InputList &Inputs) {
509
510 //
511 // CUDA
512 //
513 // We need to generate a CUDA toolchain if any of the inputs has a CUDA type.
514 if (llvm::any_of(Inputs, [](std::pair<types::ID, const llvm::opt::Arg *> &I) {
515 return types::isCuda(I.first);
516 })) {
517 const ToolChain *HostTC = C.getSingleOffloadToolChain<Action::OFK_Host>();
518 const llvm::Triple &HostTriple = HostTC->getTriple();
519 llvm::Triple CudaTriple(HostTriple.isArch64Bit() ? "nvptx64-nvidia-cuda"
520 : "nvptx-nvidia-cuda");
521 // Use the CUDA and host triples as the key into the ToolChains map, because
522 // the device toolchain we create depends on both.
523 auto &CudaTC = ToolChains[CudaTriple.str() + "/" + HostTriple.str()];
524 if (!CudaTC) {
525 CudaTC = llvm::make_unique<toolchains::CudaToolChain>(
526 *this, CudaTriple, *HostTC, C.getInputArgs(), Action::OFK_Cuda);
527 }
528 C.addOffloadDeviceToolChain(CudaTC.get(), Action::OFK_Cuda);
529 }
530
531 //
532 // OpenMP
533 //
534 // We need to generate an OpenMP toolchain if the user specified targets with
535 // the -fopenmp-targets option.
536 if (Arg *OpenMPTargets =
537 C.getInputArgs().getLastArg(options::OPT_fopenmp_targets_EQ)) {
538 if (OpenMPTargets->getNumValues()) {
539 // We expect that -fopenmp-targets is always used in conjunction with the
540 // option -fopenmp specifying a valid runtime with offloading support,
541 // i.e. libomp or libiomp.
542 bool HasValidOpenMPRuntime = C.getInputArgs().hasFlag(
543 options::OPT_fopenmp, options::OPT_fopenmp_EQ,
544 options::OPT_fno_openmp, false);
545 if (HasValidOpenMPRuntime) {
546 OpenMPRuntimeKind OpenMPKind = getOpenMPRuntime(C.getInputArgs());
547 HasValidOpenMPRuntime =
548 OpenMPKind == OMPRT_OMP || OpenMPKind == OMPRT_IOMP5;
549 }
550
551 if (HasValidOpenMPRuntime) {
552 llvm::StringMap<const char *> FoundNormalizedTriples;
553 for (const char *Val : OpenMPTargets->getValues()) {
554 llvm::Triple TT(Val);
555 std::string NormalizedName = TT.normalize();
556
557 // Make sure we don't have a duplicate triple.
558 auto Duplicate = FoundNormalizedTriples.find(NormalizedName);
559 if (Duplicate != FoundNormalizedTriples.end()) {
560 Diag(clang::diag::warn_drv_omp_offload_target_duplicate)
561 << Val << Duplicate->second;
562 continue;
563 }
564
565 // Store the current triple so that we can check for duplicates in the
566 // following iterations.
567 FoundNormalizedTriples[NormalizedName] = Val;
568
569 // If the specified target is invalid, emit a diagnostic.
570 if (TT.getArch() == llvm::Triple::UnknownArch)
571 Diag(clang::diag::err_drv_invalid_omp_target) << Val;
572 else {
573 const ToolChain *TC;
574 // CUDA toolchains have to be selected differently. They pair host
575 // and device in their implementation.
576 if (TT.isNVPTX()) {
577 const ToolChain *HostTC =
578 C.getSingleOffloadToolChain<Action::OFK_Host>();
579 assert(HostTC && "Host toolchain should be always defined.")(static_cast <bool> (HostTC && "Host toolchain should be always defined."
) ? void (0) : __assert_fail ("HostTC && \"Host toolchain should be always defined.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 579, __extension__ __PRETTY_FUNCTION__))
;
580 auto &CudaTC =
581 ToolChains[TT.str() + "/" + HostTC->getTriple().normalize()];
582 if (!CudaTC)
583 CudaTC = llvm::make_unique<toolchains::CudaToolChain>(
584 *this, TT, *HostTC, C.getInputArgs(), Action::OFK_OpenMP);
585 TC = CudaTC.get();
586 } else
587 TC = &getToolChain(C.getInputArgs(), TT);
588 C.addOffloadDeviceToolChain(TC, Action::OFK_OpenMP);
589 }
590 }
591 } else
592 Diag(clang::diag::err_drv_expecting_fopenmp_with_fopenmp_targets);
593 } else
594 Diag(clang::diag::warn_drv_empty_joined_argument)
595 << OpenMPTargets->getAsString(C.getInputArgs());
596 }
597
598 //
599 // TODO: Add support for other offloading programming models here.
600 //
601}
602
603Compilation *Driver::BuildCompilation(ArrayRef<const char *> ArgList) {
604 llvm::PrettyStackTraceString CrashInfo("Compilation construction");
605
606 // FIXME: Handle environment options which affect driver behavior, somewhere
607 // (client?). GCC_EXEC_PREFIX, LPATH, CC_PRINT_OPTIONS.
608
609 if (Optional<std::string> CompilerPathValue =
610 llvm::sys::Process::GetEnv("COMPILER_PATH")) {
611 StringRef CompilerPath = *CompilerPathValue;
612 while (!CompilerPath.empty()) {
613 std::pair<StringRef, StringRef> Split =
614 CompilerPath.split(llvm::sys::EnvPathSeparator);
615 PrefixDirs.push_back(Split.first);
616 CompilerPath = Split.second;
617 }
618 }
619
620 // We look for the driver mode option early, because the mode can affect
621 // how other options are parsed.
622 ParseDriverMode(ClangExecutable, ArgList.slice(1));
623
624 // FIXME: What are we going to do with -V and -b?
625
626 // FIXME: This stuff needs to go into the Compilation, not the driver.
627 bool CCCPrintPhases;
628
629 bool ContainsError;
630 InputArgList Args = ParseArgStrings(ArgList.slice(1), ContainsError);
631
632 // Silence driver warnings if requested
633 Diags.setIgnoreAllWarnings(Args.hasArg(options::OPT_w));
634
635 // -no-canonical-prefixes is used very early in main.
636 Args.ClaimAllArgs(options::OPT_no_canonical_prefixes);
637
638 // Ignore -pipe.
639 Args.ClaimAllArgs(options::OPT_pipe);
640
641 // Extract -ccc args.
642 //
643 // FIXME: We need to figure out where this behavior should live. Most of it
644 // should be outside in the client; the parts that aren't should have proper
645 // options, either by introducing new ones or by overloading gcc ones like -V
646 // or -b.
647 CCCPrintPhases = Args.hasArg(options::OPT_ccc_print_phases);
648 CCCPrintBindings = Args.hasArg(options::OPT_ccc_print_bindings);
649 if (const Arg *A = Args.getLastArg(options::OPT_ccc_gcc_name))
650 CCCGenericGCCName = A->getValue();
651 CCCUsePCH =
652 Args.hasFlag(options::OPT_ccc_pch_is_pch, options::OPT_ccc_pch_is_pth);
653 GenReproducer = Args.hasFlag(options::OPT_gen_reproducer,
654 options::OPT_fno_crash_diagnostics,
655 !!::getenv("FORCE_CLANG_DIAGNOSTICS_CRASH"));
656 // FIXME: DefaultTargetTriple is used by the target-prefixed calls to as/ld
657 // and getToolChain is const.
658 if (IsCLMode()) {
659 // clang-cl targets MSVC-style Win32.
660 llvm::Triple T(DefaultTargetTriple);
661 T.setOS(llvm::Triple::Win32);
662 T.setVendor(llvm::Triple::PC);
663 T.setEnvironment(llvm::Triple::MSVC);
664 T.setObjectFormat(llvm::Triple::COFF);
665 DefaultTargetTriple = T.str();
666 }
667 if (const Arg *A = Args.getLastArg(options::OPT_target))
668 DefaultTargetTriple = A->getValue();
669 if (const Arg *A = Args.getLastArg(options::OPT_ccc_install_dir))
670 Dir = InstalledDir = A->getValue();
671 for (const Arg *A : Args.filtered(options::OPT_B)) {
672 A->claim();
673 PrefixDirs.push_back(A->getValue(0));
674 }
675 if (const Arg *A = Args.getLastArg(options::OPT__sysroot_EQ))
676 SysRoot = A->getValue();
677 if (const Arg *A = Args.getLastArg(options::OPT__dyld_prefix_EQ))
678 DyldPrefix = A->getValue();
679
680 if (const Arg *A = Args.getLastArg(options::OPT_resource_dir))
681 ResourceDir = A->getValue();
682
683 if (const Arg *A = Args.getLastArg(options::OPT_save_temps_EQ)) {
684 SaveTemps = llvm::StringSwitch<SaveTempsMode>(A->getValue())
685 .Case("cwd", SaveTempsCwd)
686 .Case("obj", SaveTempsObj)
687 .Default(SaveTempsCwd);
688 }
689
690 setLTOMode(Args);
691
692 // Process -fembed-bitcode= flags.
693 if (Arg *A = Args.getLastArg(options::OPT_fembed_bitcode_EQ)) {
694 StringRef Name = A->getValue();
695 unsigned Model = llvm::StringSwitch<unsigned>(Name)
696 .Case("off", EmbedNone)
697 .Case("all", EmbedBitcode)
698 .Case("bitcode", EmbedBitcode)
699 .Case("marker", EmbedMarker)
700 .Default(~0U);
701 if (Model == ~0U) {
702 Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
703 << Name;
704 } else
705 BitcodeEmbed = static_cast<BitcodeEmbedMode>(Model);
706 }
707
708 std::unique_ptr<llvm::opt::InputArgList> UArgs =
709 llvm::make_unique<InputArgList>(std::move(Args));
710
711 // Perform the default argument translations.
712 DerivedArgList *TranslatedArgs = TranslateInputArgs(*UArgs);
713
714 // Owned by the host.
715 const ToolChain &TC = getToolChain(
716 *UArgs, computeTargetTriple(*this, DefaultTargetTriple, *UArgs));
717
718 // The compilation takes ownership of Args.
719 Compilation *C = new Compilation(*this, TC, UArgs.release(), TranslatedArgs,
720 ContainsError);
721
722 if (!HandleImmediateArgs(*C))
723 return C;
724
725 // Construct the list of inputs.
726 InputList Inputs;
727 BuildInputs(C->getDefaultToolChain(), *TranslatedArgs, Inputs);
728
729 // Populate the tool chains for the offloading devices, if any.
730 CreateOffloadingDeviceToolChains(*C, Inputs);
731
732 // Construct the list of abstract actions to perform for this compilation. On
733 // MachO targets this uses the driver-driver and universal actions.
734 if (TC.getTriple().isOSBinFormatMachO())
735 BuildUniversalActions(*C, C->getDefaultToolChain(), Inputs);
736 else
737 BuildActions(*C, C->getArgs(), Inputs, C->getActions());
738
739 if (CCCPrintPhases) {
740 PrintActions(*C);
741 return C;
742 }
743
744 BuildJobs(*C);
745
746 return C;
747}
748
749static void printArgList(raw_ostream &OS, const llvm::opt::ArgList &Args) {
750 llvm::opt::ArgStringList ASL;
751 for (const auto *A : Args)
752 A->render(Args, ASL);
753
754 for (auto I = ASL.begin(), E = ASL.end(); I != E; ++I) {
755 if (I != ASL.begin())
756 OS << ' ';
757 Command::printArg(OS, *I, true);
758 }
759 OS << '\n';
760}
761
762bool Driver::getCrashDiagnosticFile(StringRef ReproCrashFilename,
763 SmallString<128> &CrashDiagDir) {
764 using namespace llvm::sys;
765 assert(llvm::Triple(llvm::sys::getProcessTriple()).isOSDarwin() &&(static_cast <bool> (llvm::Triple(llvm::sys::getProcessTriple
()).isOSDarwin() && "Only knows about .crash files on Darwin"
) ? void (0) : __assert_fail ("llvm::Triple(llvm::sys::getProcessTriple()).isOSDarwin() && \"Only knows about .crash files on Darwin\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 766, __extension__ __PRETTY_FUNCTION__))
766 "Only knows about .crash files on Darwin")(static_cast <bool> (llvm::Triple(llvm::sys::getProcessTriple
()).isOSDarwin() && "Only knows about .crash files on Darwin"
) ? void (0) : __assert_fail ("llvm::Triple(llvm::sys::getProcessTriple()).isOSDarwin() && \"Only knows about .crash files on Darwin\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 766, __extension__ __PRETTY_FUNCTION__))
;
767
768 // The .crash file can be found on at ~/Library/Logs/DiagnosticReports/
769 // (or /Library/Logs/DiagnosticReports for root) and has the filename pattern
770 // clang-<VERSION>_<YYYY-MM-DD-HHMMSS>_<hostname>.crash.
771 path::home_directory(CrashDiagDir);
772 if (CrashDiagDir.startswith("/var/root"))
773 CrashDiagDir = "/";
774 path::append(CrashDiagDir, "Library/Logs/DiagnosticReports");
775 int PID =
776#if LLVM_ON_UNIX1
777 getpid();
778#else
779 0;
780#endif
781 std::error_code EC;
782 fs::file_status FileStatus;
783 TimePoint<> LastAccessTime;
784 SmallString<128> CrashFilePath;
785 // Lookup the .crash files and get the one generated by a subprocess spawned
786 // by this driver invocation.
787 for (fs::directory_iterator File(CrashDiagDir, EC), FileEnd;
788 File != FileEnd && !EC; File.increment(EC)) {
789 StringRef FileName = path::filename(File->path());
790 if (!FileName.startswith(Name))
791 continue;
792 if (fs::status(File->path(), FileStatus))
793 continue;
794 llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> CrashFile =
795 llvm::MemoryBuffer::getFile(File->path());
796 if (!CrashFile)
797 continue;
798 // The first line should start with "Process:", otherwise this isn't a real
799 // .crash file.
800 StringRef Data = CrashFile.get()->getBuffer();
801 if (!Data.startswith("Process:"))
802 continue;
803 // Parse parent process pid line, e.g: "Parent Process: clang-4.0 [79141]"
804 size_t ParentProcPos = Data.find("Parent Process:");
805 if (ParentProcPos == StringRef::npos)
806 continue;
807 size_t LineEnd = Data.find_first_of("\n", ParentProcPos);
808 if (LineEnd == StringRef::npos)
809 continue;
810 StringRef ParentProcess = Data.slice(ParentProcPos+15, LineEnd).trim();
811 int OpenBracket = -1, CloseBracket = -1;
812 for (size_t i = 0, e = ParentProcess.size(); i < e; ++i) {
813 if (ParentProcess[i] == '[')
814 OpenBracket = i;
815 if (ParentProcess[i] == ']')
816 CloseBracket = i;
817 }
818 // Extract the parent process PID from the .crash file and check whether
819 // it matches this driver invocation pid.
820 int CrashPID;
821 if (OpenBracket < 0 || CloseBracket < 0 ||
822 ParentProcess.slice(OpenBracket + 1, CloseBracket)
823 .getAsInteger(10, CrashPID) || CrashPID != PID) {
824 continue;
825 }
826
827 // Found a .crash file matching the driver pid. To avoid getting an older
828 // and misleading crash file, continue looking for the most recent.
829 // FIXME: the driver can dispatch multiple cc1 invocations, leading to
830 // multiple crashes poiting to the same parent process. Since the driver
831 // does not collect pid information for the dispatched invocation there's
832 // currently no way to distinguish among them.
833 const auto FileAccessTime = FileStatus.getLastModificationTime();
834 if (FileAccessTime > LastAccessTime) {
835 CrashFilePath.assign(File->path());
836 LastAccessTime = FileAccessTime;
837 }
838 }
839
840 // If found, copy it over to the location of other reproducer files.
841 if (!CrashFilePath.empty()) {
842 EC = fs::copy_file(CrashFilePath, ReproCrashFilename);
843 if (EC)
844 return false;
845 return true;
846 }
847
848 return false;
849}
850
851// When clang crashes, produce diagnostic information including the fully
852// preprocessed source file(s). Request that the developer attach the
853// diagnostic information to a bug report.
854void Driver::generateCompilationDiagnostics(Compilation &C,
855 const Command &FailingCommand) {
856 if (C.getArgs().hasArg(options::OPT_fno_crash_diagnostics))
857 return;
858
859 // Don't try to generate diagnostics for link or dsymutil jobs.
860 if (FailingCommand.getCreator().isLinkJob() ||
861 FailingCommand.getCreator().isDsymutilJob())
862 return;
863
864 // Print the version of the compiler.
865 PrintVersion(C, llvm::errs());
866
867 Diag(clang::diag::note_drv_command_failed_diag_msg)
868 << "PLEASE submit a bug report to " BUG_REPORT_URL"http://llvm.org/bugs/" " and include the "
869 "crash backtrace, preprocessed source, and associated run script.";
870
871 // Suppress driver output and emit preprocessor output to temp file.
872 Mode = CPPMode;
873 CCGenDiagnostics = true;
874
875 // Save the original job command(s).
876 Command Cmd = FailingCommand;
877
878 // Keep track of whether we produce any errors while trying to produce
879 // preprocessed sources.
880 DiagnosticErrorTrap Trap(Diags);
881
882 // Suppress tool output.
883 C.initCompilationForDiagnostics();
884
885 // Construct the list of inputs.
886 InputList Inputs;
887 BuildInputs(C.getDefaultToolChain(), C.getArgs(), Inputs);
888
889 for (InputList::iterator it = Inputs.begin(), ie = Inputs.end(); it != ie;) {
890 bool IgnoreInput = false;
891
892 // Ignore input from stdin or any inputs that cannot be preprocessed.
893 // Check type first as not all linker inputs have a value.
894 if (types::getPreprocessedType(it->first) == types::TY_INVALID) {
895 IgnoreInput = true;
896 } else if (!strcmp(it->second->getValue(), "-")) {
897 Diag(clang::diag::note_drv_command_failed_diag_msg)
898 << "Error generating preprocessed source(s) - "
899 "ignoring input from stdin.";
900 IgnoreInput = true;
901 }
902
903 if (IgnoreInput) {
904 it = Inputs.erase(it);
905 ie = Inputs.end();
906 } else {
907 ++it;
908 }
909 }
910
911 if (Inputs.empty()) {
912 Diag(clang::diag::note_drv_command_failed_diag_msg)
913 << "Error generating preprocessed source(s) - "
914 "no preprocessable inputs.";
915 return;
916 }
917
918 // Don't attempt to generate preprocessed files if multiple -arch options are
919 // used, unless they're all duplicates.
920 llvm::StringSet<> ArchNames;
921 for (const Arg *A : C.getArgs()) {
922 if (A->getOption().matches(options::OPT_arch)) {
923 StringRef ArchName = A->getValue();
924 ArchNames.insert(ArchName);
925 }
926 }
927 if (ArchNames.size() > 1) {
928 Diag(clang::diag::note_drv_command_failed_diag_msg)
929 << "Error generating preprocessed source(s) - cannot generate "
930 "preprocessed source with multiple -arch options.";
931 return;
932 }
933
934 // Construct the list of abstract actions to perform for this compilation. On
935 // Darwin OSes this uses the driver-driver and builds universal actions.
936 const ToolChain &TC = C.getDefaultToolChain();
937 if (TC.getTriple().isOSBinFormatMachO())
938 BuildUniversalActions(C, TC, Inputs);
939 else
940 BuildActions(C, C.getArgs(), Inputs, C.getActions());
941
942 BuildJobs(C);
943
944 // If there were errors building the compilation, quit now.
945 if (Trap.hasErrorOccurred()) {
946 Diag(clang::diag::note_drv_command_failed_diag_msg)
947 << "Error generating preprocessed source(s).";
948 return;
949 }
950
951 // Generate preprocessed output.
952 SmallVector<std::pair<int, const Command *>, 4> FailingCommands;
953 C.ExecuteJobs(C.getJobs(), FailingCommands);
954
955 // If any of the preprocessing commands failed, clean up and exit.
956 if (!FailingCommands.empty()) {
957 if (!isSaveTempsEnabled())
958 C.CleanupFileList(C.getTempFiles(), true);
959
960 Diag(clang::diag::note_drv_command_failed_diag_msg)
961 << "Error generating preprocessed source(s).";
962 return;
963 }
964
965 const ArgStringList &TempFiles = C.getTempFiles();
966 if (TempFiles.empty()) {
967 Diag(clang::diag::note_drv_command_failed_diag_msg)
968 << "Error generating preprocessed source(s).";
969 return;
970 }
971
972 Diag(clang::diag::note_drv_command_failed_diag_msg)
973 << "\n********************\n\n"
974 "PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:\n"
975 "Preprocessed source(s) and associated run script(s) are located at:";
976
977 SmallString<128> VFS;
978 SmallString<128> ReproCrashFilename;
979 for (const char *TempFile : TempFiles) {
980 Diag(clang::diag::note_drv_command_failed_diag_msg) << TempFile;
981 if (ReproCrashFilename.empty()) {
982 ReproCrashFilename = TempFile;
983 llvm::sys::path::replace_extension(ReproCrashFilename, ".crash");
984 }
985 if (StringRef(TempFile).endswith(".cache")) {
986 // In some cases (modules) we'll dump extra data to help with reproducing
987 // the crash into a directory next to the output.
988 VFS = llvm::sys::path::filename(TempFile);
989 llvm::sys::path::append(VFS, "vfs", "vfs.yaml");
990 }
991 }
992
993 // Assume associated files are based off of the first temporary file.
994 CrashReportInfo CrashInfo(TempFiles[0], VFS);
995
996 std::string Script = CrashInfo.Filename.rsplit('.').first.str() + ".sh";
997 std::error_code EC;
998 llvm::raw_fd_ostream ScriptOS(Script, EC, llvm::sys::fs::F_Excl);
999 if (EC) {
1000 Diag(clang::diag::note_drv_command_failed_diag_msg)
1001 << "Error generating run script: " + Script + " " + EC.message();
1002 } else {
1003 ScriptOS << "# Crash reproducer for " << getClangFullVersion() << "\n"
1004 << "# Driver args: ";
1005 printArgList(ScriptOS, C.getInputArgs());
1006 ScriptOS << "# Original command: ";
1007 Cmd.Print(ScriptOS, "\n", /*Quote=*/true);
1008 Cmd.Print(ScriptOS, "\n", /*Quote=*/true, &CrashInfo);
1009 Diag(clang::diag::note_drv_command_failed_diag_msg) << Script;
1010 }
1011
1012 // On darwin, provide information about the .crash diagnostic report.
1013 if (llvm::Triple(llvm::sys::getProcessTriple()).isOSDarwin()) {
1014 SmallString<128> CrashDiagDir;
1015 if (getCrashDiagnosticFile(ReproCrashFilename, CrashDiagDir)) {
1016 Diag(clang::diag::note_drv_command_failed_diag_msg)
1017 << ReproCrashFilename.str();
1018 } else { // Suggest a directory for the user to look for .crash files.
1019 llvm::sys::path::append(CrashDiagDir, Name);
1020 CrashDiagDir += "_<YYYY-MM-DD-HHMMSS>_<hostname>.crash";
1021 Diag(clang::diag::note_drv_command_failed_diag_msg)
1022 << "Crash backtrace is located in";
1023 Diag(clang::diag::note_drv_command_failed_diag_msg)
1024 << CrashDiagDir.str();
1025 Diag(clang::diag::note_drv_command_failed_diag_msg)
1026 << "(choose the .crash file that corresponds to your crash)";
1027 }
1028 }
1029
1030 for (const auto &A : C.getArgs().filtered(options::OPT_frewrite_map_file,
1031 options::OPT_frewrite_map_file_EQ))
1032 Diag(clang::diag::note_drv_command_failed_diag_msg) << A->getValue();
1033
1034 Diag(clang::diag::note_drv_command_failed_diag_msg)
1035 << "\n\n********************";
1036}
1037
1038void Driver::setUpResponseFiles(Compilation &C, Command &Cmd) {
1039 // Since commandLineFitsWithinSystemLimits() may underestimate system's capacity
1040 // if the tool does not support response files, there is a chance/ that things
1041 // will just work without a response file, so we silently just skip it.
1042 if (Cmd.getCreator().getResponseFilesSupport() == Tool::RF_None ||
1043 llvm::sys::commandLineFitsWithinSystemLimits(Cmd.getExecutable(), Cmd.getArguments()))
1044 return;
1045
1046 std::string TmpName = GetTemporaryPath("response", "txt");
1047 Cmd.setResponseFile(C.addTempFile(C.getArgs().MakeArgString(TmpName)));
1048}
1049
1050int Driver::ExecuteCompilation(
1051 Compilation &C,
1052 SmallVectorImpl<std::pair<int, const Command *>> &FailingCommands) {
1053 // Just print if -### was present.
1054 if (C.getArgs().hasArg(options::OPT__HASH_HASH_HASH)) {
1055 C.getJobs().Print(llvm::errs(), "\n", true);
1056 return 0;
1057 }
1058
1059 // If there were errors building the compilation, quit now.
1060 if (Diags.hasErrorOccurred())
1061 return 1;
1062
1063 // Set up response file names for each command, if necessary
1064 for (auto &Job : C.getJobs())
1065 setUpResponseFiles(C, Job);
1066
1067 C.ExecuteJobs(C.getJobs(), FailingCommands);
1068
1069 // Remove temp files.
1070 C.CleanupFileList(C.getTempFiles());
1071
1072 // If the command succeeded, we are done.
1073 if (FailingCommands.empty())
1074 return 0;
1075
1076 // Otherwise, remove result files and print extra information about abnormal
1077 // failures.
1078 for (const auto &CmdPair : FailingCommands) {
1079 int Res = CmdPair.first;
1080 const Command *FailingCommand = CmdPair.second;
1081
1082 // Remove result files if we're not saving temps.
1083 if (!isSaveTempsEnabled()) {
1084 const JobAction *JA = cast<JobAction>(&FailingCommand->getSource());
1085 C.CleanupFileMap(C.getResultFiles(), JA, true);
1086
1087 // Failure result files are valid unless we crashed.
1088 if (Res < 0)
1089 C.CleanupFileMap(C.getFailureResultFiles(), JA, true);
1090 }
1091
1092 // Print extra information about abnormal failures, if possible.
1093 //
1094 // This is ad-hoc, but we don't want to be excessively noisy. If the result
1095 // status was 1, assume the command failed normally. In particular, if it
1096 // was the compiler then assume it gave a reasonable error code. Failures
1097 // in other tools are less common, and they generally have worse
1098 // diagnostics, so always print the diagnostic there.
1099 const Tool &FailingTool = FailingCommand->getCreator();
1100
1101 if (!FailingCommand->getCreator().hasGoodDiagnostics() || Res != 1) {
1102 // FIXME: See FIXME above regarding result code interpretation.
1103 if (Res < 0)
1104 Diag(clang::diag::err_drv_command_signalled)
1105 << FailingTool.getShortName();
1106 else
1107 Diag(clang::diag::err_drv_command_failed) << FailingTool.getShortName()
1108 << Res;
1109 }
1110 }
1111 return 0;
1112}
1113
1114void Driver::PrintHelp(bool ShowHidden) const {
1115 unsigned IncludedFlagsBitmask;
1116 unsigned ExcludedFlagsBitmask;
1117 std::tie(IncludedFlagsBitmask, ExcludedFlagsBitmask) =
1118 getIncludeExcludeOptionFlagMasks();
1119
1120 ExcludedFlagsBitmask |= options::NoDriverOption;
1121 if (!ShowHidden)
1122 ExcludedFlagsBitmask |= HelpHidden;
1123
1124 getOpts().PrintHelp(llvm::outs(), Name.c_str(), DriverTitle.c_str(),
1125 IncludedFlagsBitmask, ExcludedFlagsBitmask,
1126 /*ShowAllAliases=*/false);
1127}
1128
1129void Driver::PrintVersion(const Compilation &C, raw_ostream &OS) const {
1130 // FIXME: The following handlers should use a callback mechanism, we don't
1131 // know what the client would like to do.
1132 OS << getClangFullVersion() << '\n';
1133 const ToolChain &TC = C.getDefaultToolChain();
1134 OS << "Target: " << TC.getTripleString() << '\n';
1135
1136 // Print the threading model.
1137 if (Arg *A = C.getArgs().getLastArg(options::OPT_mthread_model)) {
1138 // Don't print if the ToolChain would have barfed on it already
1139 if (TC.isThreadModelSupported(A->getValue()))
1140 OS << "Thread model: " << A->getValue();
1141 } else
1142 OS << "Thread model: " << TC.getThreadModel();
1143 OS << '\n';
1144
1145 // Print out the install directory.
1146 OS << "InstalledDir: " << InstalledDir << '\n';
1147}
1148
1149/// PrintDiagnosticCategories - Implement the --print-diagnostic-categories
1150/// option.
1151static void PrintDiagnosticCategories(raw_ostream &OS) {
1152 // Skip the empty category.
1153 for (unsigned i = 1, max = DiagnosticIDs::getNumberOfCategories(); i != max;
1154 ++i)
1155 OS << i << ',' << DiagnosticIDs::getCategoryNameFromID(i) << '\n';
1156}
1157
1158void Driver::handleAutocompletions(StringRef PassedFlags) const {
1159 // Print out all options that start with a given argument. This is used for
1160 // shell autocompletion.
1161 std::vector<std::string> SuggestedCompletions;
1162
1163 unsigned short DisableFlags =
1164 options::NoDriverOption | options::Unsupported | options::Ignored;
1165 // We want to show cc1-only options only when clang is invoked as "clang
1166 // -cc1". When clang is invoked as "clang -cc1", we add "#" to the beginning
1167 // of an --autocomplete option so that the clang driver can distinguish
1168 // whether it is requested to show cc1-only options or not.
1169 if (PassedFlags.size() > 0 && PassedFlags[0] == '#') {
1170 DisableFlags &= ~options::NoDriverOption;
1171 PassedFlags = PassedFlags.substr(1);
1172 }
1173
1174 if (PassedFlags.find(',') == StringRef::npos) {
1175 // If the flag is in the form of "--autocomplete=-foo",
1176 // we were requested to print out all option names that start with "-foo".
1177 // For example, "--autocomplete=-fsyn" is expanded to "-fsyntax-only".
1178 SuggestedCompletions = Opts->findByPrefix(PassedFlags, DisableFlags);
1179
1180 // We have to query the -W flags manually as they're not in the OptTable.
1181 // TODO: Find a good way to add them to OptTable instead and them remove
1182 // this code.
1183 for (StringRef S : DiagnosticIDs::getDiagnosticFlags())
1184 if (S.startswith(PassedFlags))
1185 SuggestedCompletions.push_back(S);
1186 } else {
1187 // If the flag is in the form of "--autocomplete=foo,bar", we were
1188 // requested to print out all option values for "-foo" that start with
1189 // "bar". For example,
1190 // "--autocomplete=-stdlib=,l" is expanded to "libc++" and "libstdc++".
1191 StringRef Option, Arg;
1192 std::tie(Option, Arg) = PassedFlags.split(',');
1193 SuggestedCompletions = Opts->suggestValueCompletions(Option, Arg);
1194 }
1195
1196 // Sort the autocomplete candidates so that shells print them out in a
1197 // deterministic order. We could sort in any way, but we chose
1198 // case-insensitive sorting for consistency with the -help option
1199 // which prints out options in the case-insensitive alphabetical order.
1200 std::sort(SuggestedCompletions.begin(), SuggestedCompletions.end(),
1201 [](StringRef A, StringRef B) {
1202 if (int X = A.compare_lower(B))
1203 return X < 0;
1204 return A.compare(B) > 0;
1205 });
1206
1207 llvm::outs() << llvm::join(SuggestedCompletions, "\n") << '\n';
1208}
1209
1210bool Driver::HandleImmediateArgs(const Compilation &C) {
1211 // The order these options are handled in gcc is all over the place, but we
1212 // don't expect inconsistencies w.r.t. that to matter in practice.
1213
1214 if (C.getArgs().hasArg(options::OPT_dumpmachine)) {
1215 llvm::outs() << C.getDefaultToolChain().getTripleString() << '\n';
1216 return false;
1217 }
1218
1219 if (C.getArgs().hasArg(options::OPT_dumpversion)) {
1220 // Since -dumpversion is only implemented for pedantic GCC compatibility, we
1221 // return an answer which matches our definition of __VERSION__.
1222 //
1223 // If we want to return a more correct answer some day, then we should
1224 // introduce a non-pedantically GCC compatible mode to Clang in which we
1225 // provide sensible definitions for -dumpversion, __VERSION__, etc.
1226 llvm::outs() << "4.2.1\n";
1227 return false;
1228 }
1229
1230 if (C.getArgs().hasArg(options::OPT__print_diagnostic_categories)) {
1231 PrintDiagnosticCategories(llvm::outs());
1232 return false;
1233 }
1234
1235 if (C.getArgs().hasArg(options::OPT_help) ||
1236 C.getArgs().hasArg(options::OPT__help_hidden)) {
1237 PrintHelp(C.getArgs().hasArg(options::OPT__help_hidden));
1238 return false;
1239 }
1240
1241 if (C.getArgs().hasArg(options::OPT__version)) {
1242 // Follow gcc behavior and use stdout for --version and stderr for -v.
1243 PrintVersion(C, llvm::outs());
1244 return false;
1245 }
1246
1247 if (C.getArgs().hasArg(options::OPT_v) ||
1248 C.getArgs().hasArg(options::OPT__HASH_HASH_HASH)) {
1249 PrintVersion(C, llvm::errs());
1250 SuppressMissingInputWarning = true;
1251 }
1252
1253 const ToolChain &TC = C.getDefaultToolChain();
1254
1255 if (C.getArgs().hasArg(options::OPT_v))
1256 TC.printVerboseInfo(llvm::errs());
1257
1258 if (C.getArgs().hasArg(options::OPT_print_resource_dir)) {
1259 llvm::outs() << ResourceDir << '\n';
1260 return false;
1261 }
1262
1263 if (C.getArgs().hasArg(options::OPT_print_search_dirs)) {
1264 llvm::outs() << "programs: =";
1265 bool separator = false;
1266 for (const std::string &Path : TC.getProgramPaths()) {
1267 if (separator)
1268 llvm::outs() << ':';
1269 llvm::outs() << Path;
1270 separator = true;
1271 }
1272 llvm::outs() << "\n";
1273 llvm::outs() << "libraries: =" << ResourceDir;
1274
1275 StringRef sysroot = C.getSysRoot();
1276
1277 for (const std::string &Path : TC.getFilePaths()) {
1278 // Always print a separator. ResourceDir was the first item shown.
1279 llvm::outs() << ':';
1280 // Interpretation of leading '=' is needed only for NetBSD.
1281 if (Path[0] == '=')
1282 llvm::outs() << sysroot << Path.substr(1);
1283 else
1284 llvm::outs() << Path;
1285 }
1286 llvm::outs() << "\n";
1287 return false;
1288 }
1289
1290 // FIXME: The following handlers should use a callback mechanism, we don't
1291 // know what the client would like to do.
1292 if (Arg *A = C.getArgs().getLastArg(options::OPT_print_file_name_EQ)) {
1293 llvm::outs() << GetFilePath(A->getValue(), TC) << "\n";
1294 return false;
1295 }
1296
1297 if (Arg *A = C.getArgs().getLastArg(options::OPT_print_prog_name_EQ)) {
1298 llvm::outs() << GetProgramPath(A->getValue(), TC) << "\n";
1299 return false;
1300 }
1301
1302 if (Arg *A = C.getArgs().getLastArg(options::OPT_autocomplete)) {
1303 StringRef PassedFlags = A->getValue();
1304 handleAutocompletions(PassedFlags);
1305 return false;
1306 }
1307
1308 if (C.getArgs().hasArg(options::OPT_print_libgcc_file_name)) {
1309 ToolChain::RuntimeLibType RLT = TC.GetRuntimeLibType(C.getArgs());
1310 const llvm::Triple Triple(TC.ComputeEffectiveClangTriple(C.getArgs()));
1311 RegisterEffectiveTriple TripleRAII(TC, Triple);
1312 switch (RLT) {
1313 case ToolChain::RLT_CompilerRT:
1314 llvm::outs() << TC.getCompilerRT(C.getArgs(), "builtins") << "\n";
1315 break;
1316 case ToolChain::RLT_Libgcc:
1317 llvm::outs() << GetFilePath("libgcc.a", TC) << "\n";
1318 break;
1319 }
1320 return false;
1321 }
1322
1323 if (C.getArgs().hasArg(options::OPT_print_multi_lib)) {
1324 for (const Multilib &Multilib : TC.getMultilibs())
1325 llvm::outs() << Multilib << "\n";
1326 return false;
1327 }
1328
1329 if (C.getArgs().hasArg(options::OPT_print_multi_directory)) {
1330 for (const Multilib &Multilib : TC.getMultilibs()) {
1331 if (Multilib.gccSuffix().empty())
1332 llvm::outs() << ".\n";
1333 else {
1334 StringRef Suffix(Multilib.gccSuffix());
1335 assert(Suffix.front() == '/')(static_cast <bool> (Suffix.front() == '/') ? void (0) :
__assert_fail ("Suffix.front() == '/'", "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 1335, __extension__ __PRETTY_FUNCTION__))
;
1336 llvm::outs() << Suffix.substr(1) << "\n";
1337 }
1338 }
1339 return false;
1340 }
1341 return true;
1342}
1343
1344// Display an action graph human-readably. Action A is the "sink" node
1345// and latest-occuring action. Traversal is in pre-order, visiting the
1346// inputs to each action before printing the action itself.
1347static unsigned PrintActions1(const Compilation &C, Action *A,
1348 std::map<Action *, unsigned> &Ids) {
1349 if (Ids.count(A)) // A was already visited.
1350 return Ids[A];
1351
1352 std::string str;
1353 llvm::raw_string_ostream os(str);
1354
1355 os << Action::getClassName(A->getKind()) << ", ";
1356 if (InputAction *IA = dyn_cast<InputAction>(A)) {
1357 os << "\"" << IA->getInputArg().getValue() << "\"";
1358 } else if (BindArchAction *BIA = dyn_cast<BindArchAction>(A)) {
1359 os << '"' << BIA->getArchName() << '"' << ", {"
1360 << PrintActions1(C, *BIA->input_begin(), Ids) << "}";
1361 } else if (OffloadAction *OA = dyn_cast<OffloadAction>(A)) {
1362 bool IsFirst = true;
1363 OA->doOnEachDependence(
1364 [&](Action *A, const ToolChain *TC, const char *BoundArch) {
1365 // E.g. for two CUDA device dependences whose bound arch is sm_20 and
1366 // sm_35 this will generate:
1367 // "cuda-device" (nvptx64-nvidia-cuda:sm_20) {#ID}, "cuda-device"
1368 // (nvptx64-nvidia-cuda:sm_35) {#ID}
1369 if (!IsFirst)
1
Assuming 'IsFirst' is not equal to 0
2
Taking false branch
1370 os << ", ";
1371 os << '"';
1372 if (TC)
3
Assuming 'TC' is null
4
Taking false branch
1373 os << A->getOffloadingKindPrefix();
1374 else
1375 os << "host";
1376 os << " (";
1377 os << TC->getTriple().normalize();
5
Called C++ object pointer is null
1378
1379 if (BoundArch)
1380 os << ":" << BoundArch;
1381 os << ")";
1382 os << '"';
1383 os << " {" << PrintActions1(C, A, Ids) << "}";
1384 IsFirst = false;
1385 });
1386 } else {
1387 const ActionList *AL = &A->getInputs();
1388
1389 if (AL->size()) {
1390 const char *Prefix = "{";
1391 for (Action *PreRequisite : *AL) {
1392 os << Prefix << PrintActions1(C, PreRequisite, Ids);
1393 Prefix = ", ";
1394 }
1395 os << "}";
1396 } else
1397 os << "{}";
1398 }
1399
1400 // Append offload info for all options other than the offloading action
1401 // itself (e.g. (cuda-device, sm_20) or (cuda-host)).
1402 std::string offload_str;
1403 llvm::raw_string_ostream offload_os(offload_str);
1404 if (!isa<OffloadAction>(A)) {
1405 auto S = A->getOffloadingKindPrefix();
1406 if (!S.empty()) {
1407 offload_os << ", (" << S;
1408 if (A->getOffloadingArch())
1409 offload_os << ", " << A->getOffloadingArch();
1410 offload_os << ")";
1411 }
1412 }
1413
1414 unsigned Id = Ids.size();
1415 Ids[A] = Id;
1416 llvm::errs() << Id << ": " << os.str() << ", "
1417 << types::getTypeName(A->getType()) << offload_os.str() << "\n";
1418
1419 return Id;
1420}
1421
1422// Print the action graphs in a compilation C.
1423// For example "clang -c file1.c file2.c" is composed of two subgraphs.
1424void Driver::PrintActions(const Compilation &C) const {
1425 std::map<Action *, unsigned> Ids;
1426 for (Action *A : C.getActions())
1427 PrintActions1(C, A, Ids);
1428}
1429
1430/// \brief Check whether the given input tree contains any compilation or
1431/// assembly actions.
1432static bool ContainsCompileOrAssembleAction(const Action *A) {
1433 if (isa<CompileJobAction>(A) || isa<BackendJobAction>(A) ||
1434 isa<AssembleJobAction>(A))
1435 return true;
1436
1437 for (const Action *Input : A->inputs())
1438 if (ContainsCompileOrAssembleAction(Input))
1439 return true;
1440
1441 return false;
1442}
1443
1444void Driver::BuildUniversalActions(Compilation &C, const ToolChain &TC,
1445 const InputList &BAInputs) const {
1446 DerivedArgList &Args = C.getArgs();
1447 ActionList &Actions = C.getActions();
1448 llvm::PrettyStackTraceString CrashInfo("Building universal build actions");
1449 // Collect the list of architectures. Duplicates are allowed, but should only
1450 // be handled once (in the order seen).
1451 llvm::StringSet<> ArchNames;
1452 SmallVector<const char *, 4> Archs;
1453 for (Arg *A : Args) {
1454 if (A->getOption().matches(options::OPT_arch)) {
1455 // Validate the option here; we don't save the type here because its
1456 // particular spelling may participate in other driver choices.
1457 llvm::Triple::ArchType Arch =
1458 tools::darwin::getArchTypeForMachOArchName(A->getValue());
1459 if (Arch == llvm::Triple::UnknownArch) {
1460 Diag(clang::diag::err_drv_invalid_arch_name) << A->getAsString(Args);
1461 continue;
1462 }
1463
1464 A->claim();
1465 if (ArchNames.insert(A->getValue()).second)
1466 Archs.push_back(A->getValue());
1467 }
1468 }
1469
1470 // When there is no explicit arch for this platform, make sure we still bind
1471 // the architecture (to the default) so that -Xarch_ is handled correctly.
1472 if (!Archs.size())
1473 Archs.push_back(Args.MakeArgString(TC.getDefaultUniversalArchName()));
1474
1475 ActionList SingleActions;
1476 BuildActions(C, Args, BAInputs, SingleActions);
1477
1478 // Add in arch bindings for every top level action, as well as lipo and
1479 // dsymutil steps if needed.
1480 for (Action* Act : SingleActions) {
1481 // Make sure we can lipo this kind of output. If not (and it is an actual
1482 // output) then we disallow, since we can't create an output file with the
1483 // right name without overwriting it. We could remove this oddity by just
1484 // changing the output names to include the arch, which would also fix
1485 // -save-temps. Compatibility wins for now.
1486
1487 if (Archs.size() > 1 && !types::canLipoType(Act->getType()))
1488 Diag(clang::diag::err_drv_invalid_output_with_multiple_archs)
1489 << types::getTypeName(Act->getType());
1490
1491 ActionList Inputs;
1492 for (unsigned i = 0, e = Archs.size(); i != e; ++i)
1493 Inputs.push_back(C.MakeAction<BindArchAction>(Act, Archs[i]));
1494
1495 // Lipo if necessary, we do it this way because we need to set the arch flag
1496 // so that -Xarch_ gets overwritten.
1497 if (Inputs.size() == 1 || Act->getType() == types::TY_Nothing)
1498 Actions.append(Inputs.begin(), Inputs.end());
1499 else
1500 Actions.push_back(C.MakeAction<LipoJobAction>(Inputs, Act->getType()));
1501
1502 // Handle debug info queries.
1503 Arg *A = Args.getLastArg(options::OPT_g_Group);
1504 if (A && !A->getOption().matches(options::OPT_g0) &&
1505 !A->getOption().matches(options::OPT_gstabs) &&
1506 ContainsCompileOrAssembleAction(Actions.back())) {
1507
1508 // Add a 'dsymutil' step if necessary, when debug info is enabled and we
1509 // have a compile input. We need to run 'dsymutil' ourselves in such cases
1510 // because the debug info will refer to a temporary object file which
1511 // will be removed at the end of the compilation process.
1512 if (Act->getType() == types::TY_Image) {
1513 ActionList Inputs;
1514 Inputs.push_back(Actions.back());
1515 Actions.pop_back();
1516 Actions.push_back(
1517 C.MakeAction<DsymutilJobAction>(Inputs, types::TY_dSYM));
1518 }
1519
1520 // Verify the debug info output.
1521 if (Args.hasArg(options::OPT_verify_debug_info)) {
1522 Action* LastAction = Actions.back();
1523 Actions.pop_back();
1524 Actions.push_back(C.MakeAction<VerifyDebugInfoJobAction>(
1525 LastAction, types::TY_Nothing));
1526 }
1527 }
1528 }
1529}
1530
1531/// \brief Check that the file referenced by Value exists. If it doesn't,
1532/// issue a diagnostic and return false.
1533static bool DiagnoseInputExistence(const Driver &D, const DerivedArgList &Args,
1534 StringRef Value, types::ID Ty) {
1535 if (!D.getCheckInputsExist())
1536 return true;
1537
1538 // stdin always exists.
1539 if (Value == "-")
1540 return true;
1541
1542 SmallString<64> Path(Value);
1543 if (Arg *WorkDir = Args.getLastArg(options::OPT_working_directory)) {
1544 if (!llvm::sys::path::is_absolute(Path)) {
1545 SmallString<64> Directory(WorkDir->getValue());
1546 llvm::sys::path::append(Directory, Value);
1547 Path.assign(Directory);
1548 }
1549 }
1550
1551 if (llvm::sys::fs::exists(Twine(Path)))
1552 return true;
1553
1554 if (D.IsCLMode()) {
1555 if (!llvm::sys::path::is_absolute(Twine(Path)) &&
1556 llvm::sys::Process::FindInEnvPath("LIB", Value))
1557 return true;
1558
1559 if (Args.hasArg(options::OPT__SLASH_link) && Ty == types::TY_Object) {
1560 // Arguments to the /link flag might cause the linker to search for object
1561 // and library files in paths we don't know about. Don't error in such
1562 // cases.
1563 return true;
1564 }
1565 }
1566
1567 D.Diag(clang::diag::err_drv_no_such_file) << Path;
1568 return false;
1569}
1570
1571// Construct a the list of inputs and their types.
1572void Driver::BuildInputs(const ToolChain &TC, DerivedArgList &Args,
1573 InputList &Inputs) const {
1574 // Track the current user specified (-x) input. We also explicitly track the
1575 // argument used to set the type; we only want to claim the type when we
1576 // actually use it, so we warn about unused -x arguments.
1577 types::ID InputType = types::TY_Nothing;
1578 Arg *InputTypeArg = nullptr;
1579
1580 // The last /TC or /TP option sets the input type to C or C++ globally.
1581 if (Arg *TCTP = Args.getLastArgNoClaim(options::OPT__SLASH_TC,
1582 options::OPT__SLASH_TP)) {
1583 InputTypeArg = TCTP;
1584 InputType = TCTP->getOption().matches(options::OPT__SLASH_TC)
1585 ? types::TY_C
1586 : types::TY_CXX;
1587
1588 Arg *Previous = nullptr;
1589 bool ShowNote = false;
1590 for (Arg *A : Args.filtered(options::OPT__SLASH_TC, options::OPT__SLASH_TP)) {
1591 if (Previous) {
1592 Diag(clang::diag::warn_drv_overriding_flag_option)
1593 << Previous->getSpelling() << A->getSpelling();
1594 ShowNote = true;
1595 }
1596 Previous = A;
1597 }
1598 if (ShowNote)
1599 Diag(clang::diag::note_drv_t_option_is_global);
1600
1601 // No driver mode exposes -x and /TC or /TP; we don't support mixing them.
1602 assert(!Args.hasArg(options::OPT_x) && "-x and /TC or /TP is not allowed")(static_cast <bool> (!Args.hasArg(options::OPT_x) &&
"-x and /TC or /TP is not allowed") ? void (0) : __assert_fail
("!Args.hasArg(options::OPT_x) && \"-x and /TC or /TP is not allowed\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 1602, __extension__ __PRETTY_FUNCTION__))
;
1603 }
1604
1605 for (Arg *A : Args) {
1606 if (A->getOption().getKind() == Option::InputClass) {
1607 const char *Value = A->getValue();
1608 types::ID Ty = types::TY_INVALID;
1609
1610 // Infer the input type if necessary.
1611 if (InputType == types::TY_Nothing) {
1612 // If there was an explicit arg for this, claim it.
1613 if (InputTypeArg)
1614 InputTypeArg->claim();
1615
1616 // stdin must be handled specially.
1617 if (memcmp(Value, "-", 2) == 0) {
1618 // If running with -E, treat as a C input (this changes the builtin
1619 // macros, for example). This may be overridden by -ObjC below.
1620 //
1621 // Otherwise emit an error but still use a valid type to avoid
1622 // spurious errors (e.g., no inputs).
1623 if (!Args.hasArgNoClaim(options::OPT_E) && !CCCIsCPP())
1624 Diag(IsCLMode() ? clang::diag::err_drv_unknown_stdin_type_clang_cl
1625 : clang::diag::err_drv_unknown_stdin_type);
1626 Ty = types::TY_C;
1627 } else {
1628 // Otherwise lookup by extension.
1629 // Fallback is C if invoked as C preprocessor or Object otherwise.
1630 // We use a host hook here because Darwin at least has its own
1631 // idea of what .s is.
1632 if (const char *Ext = strrchr(Value, '.'))
1633 Ty = TC.LookupTypeForExtension(Ext + 1);
1634
1635 if (Ty == types::TY_INVALID) {
1636 if (CCCIsCPP())
1637 Ty = types::TY_C;
1638 else
1639 Ty = types::TY_Object;
1640 }
1641
1642 // If the driver is invoked as C++ compiler (like clang++ or c++) it
1643 // should autodetect some input files as C++ for g++ compatibility.
1644 if (CCCIsCXX()) {
1645 types::ID OldTy = Ty;
1646 Ty = types::lookupCXXTypeForCType(Ty);
1647
1648 if (Ty != OldTy)
1649 Diag(clang::diag::warn_drv_treating_input_as_cxx)
1650 << getTypeName(OldTy) << getTypeName(Ty);
1651 }
1652 }
1653
1654 // -ObjC and -ObjC++ override the default language, but only for "source
1655 // files". We just treat everything that isn't a linker input as a
1656 // source file.
1657 //
1658 // FIXME: Clean this up if we move the phase sequence into the type.
1659 if (Ty != types::TY_Object) {
1660 if (Args.hasArg(options::OPT_ObjC))
1661 Ty = types::TY_ObjC;
1662 else if (Args.hasArg(options::OPT_ObjCXX))
1663 Ty = types::TY_ObjCXX;
1664 }
1665 } else {
1666 assert(InputTypeArg && "InputType set w/o InputTypeArg")(static_cast <bool> (InputTypeArg && "InputType set w/o InputTypeArg"
) ? void (0) : __assert_fail ("InputTypeArg && \"InputType set w/o InputTypeArg\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 1666, __extension__ __PRETTY_FUNCTION__))
;
1667 if (!InputTypeArg->getOption().matches(options::OPT_x)) {
1668 // If emulating cl.exe, make sure that /TC and /TP don't affect input
1669 // object files.
1670 const char *Ext = strrchr(Value, '.');
1671 if (Ext && TC.LookupTypeForExtension(Ext + 1) == types::TY_Object)
1672 Ty = types::TY_Object;
1673 }
1674 if (Ty == types::TY_INVALID) {
1675 Ty = InputType;
1676 InputTypeArg->claim();
1677 }
1678 }
1679
1680 if (DiagnoseInputExistence(*this, Args, Value, Ty))
1681 Inputs.push_back(std::make_pair(Ty, A));
1682
1683 } else if (A->getOption().matches(options::OPT__SLASH_Tc)) {
1684 StringRef Value = A->getValue();
1685 if (DiagnoseInputExistence(*this, Args, Value, types::TY_C)) {
1686 Arg *InputArg = MakeInputArg(Args, *Opts, A->getValue());
1687 Inputs.push_back(std::make_pair(types::TY_C, InputArg));
1688 }
1689 A->claim();
1690 } else if (A->getOption().matches(options::OPT__SLASH_Tp)) {
1691 StringRef Value = A->getValue();
1692 if (DiagnoseInputExistence(*this, Args, Value, types::TY_CXX)) {
1693 Arg *InputArg = MakeInputArg(Args, *Opts, A->getValue());
1694 Inputs.push_back(std::make_pair(types::TY_CXX, InputArg));
1695 }
1696 A->claim();
1697 } else if (A->getOption().hasFlag(options::LinkerInput)) {
1698 // Just treat as object type, we could make a special type for this if
1699 // necessary.
1700 Inputs.push_back(std::make_pair(types::TY_Object, A));
1701
1702 } else if (A->getOption().matches(options::OPT_x)) {
1703 InputTypeArg = A;
1704 InputType = types::lookupTypeForTypeSpecifier(A->getValue());
1705 A->claim();
1706
1707 // Follow gcc behavior and treat as linker input for invalid -x
1708 // options. Its not clear why we shouldn't just revert to unknown; but
1709 // this isn't very important, we might as well be bug compatible.
1710 if (!InputType) {
1711 Diag(clang::diag::err_drv_unknown_language) << A->getValue();
1712 InputType = types::TY_Object;
1713 }
1714 } else if (A->getOption().getID() == options::OPT__SLASH_U) {
1715 assert(A->getNumValues() == 1 && "The /U option has one value.")(static_cast <bool> (A->getNumValues() == 1 &&
"The /U option has one value.") ? void (0) : __assert_fail (
"A->getNumValues() == 1 && \"The /U option has one value.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 1715, __extension__ __PRETTY_FUNCTION__))
;
1716 StringRef Val = A->getValue(0);
1717 if (Val.find_first_of("/\\") != StringRef::npos) {
1718 // Warn about e.g. "/Users/me/myfile.c".
1719 Diag(diag::warn_slash_u_filename) << Val;
1720 Diag(diag::note_use_dashdash);
1721 }
1722 }
1723 }
1724 if (CCCIsCPP() && Inputs.empty()) {
1725 // If called as standalone preprocessor, stdin is processed
1726 // if no other input is present.
1727 Arg *A = MakeInputArg(Args, *Opts, "-");
1728 Inputs.push_back(std::make_pair(types::TY_C, A));
1729 }
1730}
1731
1732namespace {
1733/// Provides a convenient interface for different programming models to generate
1734/// the required device actions.
1735class OffloadingActionBuilder final {
1736 /// Flag used to trace errors in the builder.
1737 bool IsValid = false;
1738
1739 /// The compilation that is using this builder.
1740 Compilation &C;
1741
1742 /// Map between an input argument and the offload kinds used to process it.
1743 std::map<const Arg *, unsigned> InputArgToOffloadKindMap;
1744
1745 /// Builder interface. It doesn't build anything or keep any state.
1746 class DeviceActionBuilder {
1747 public:
1748 typedef llvm::SmallVector<phases::ID, phases::MaxNumberOfPhases> PhasesTy;
1749
1750 enum ActionBuilderReturnCode {
1751 // The builder acted successfully on the current action.
1752 ABRT_Success,
1753 // The builder didn't have to act on the current action.
1754 ABRT_Inactive,
1755 // The builder was successful and requested the host action to not be
1756 // generated.
1757 ABRT_Ignore_Host,
1758 };
1759
1760 protected:
1761 /// Compilation associated with this builder.
1762 Compilation &C;
1763
1764 /// Tool chains associated with this builder. The same programming
1765 /// model may have associated one or more tool chains.
1766 SmallVector<const ToolChain *, 2> ToolChains;
1767
1768 /// The derived arguments associated with this builder.
1769 DerivedArgList &Args;
1770
1771 /// The inputs associated with this builder.
1772 const Driver::InputList &Inputs;
1773
1774 /// The associated offload kind.
1775 Action::OffloadKind AssociatedOffloadKind = Action::OFK_None;
1776
1777 public:
1778 DeviceActionBuilder(Compilation &C, DerivedArgList &Args,
1779 const Driver::InputList &Inputs,
1780 Action::OffloadKind AssociatedOffloadKind)
1781 : C(C), Args(Args), Inputs(Inputs),
1782 AssociatedOffloadKind(AssociatedOffloadKind) {}
1783 virtual ~DeviceActionBuilder() {}
1784
1785 /// Fill up the array \a DA with all the device dependences that should be
1786 /// added to the provided host action \a HostAction. By default it is
1787 /// inactive.
1788 virtual ActionBuilderReturnCode
1789 getDeviceDependences(OffloadAction::DeviceDependences &DA,
1790 phases::ID CurPhase, phases::ID FinalPhase,
1791 PhasesTy &Phases) {
1792 return ABRT_Inactive;
1793 }
1794
1795 /// Update the state to include the provided host action \a HostAction as a
1796 /// dependency of the current device action. By default it is inactive.
1797 virtual ActionBuilderReturnCode addDeviceDepences(Action *HostAction) {
1798 return ABRT_Inactive;
1799 }
1800
1801 /// Append top level actions generated by the builder. Return true if errors
1802 /// were found.
1803 virtual void appendTopLevelActions(ActionList &AL) {}
1804
1805 /// Append linker actions generated by the builder. Return true if errors
1806 /// were found.
1807 virtual void appendLinkDependences(OffloadAction::DeviceDependences &DA) {}
1808
1809 /// Initialize the builder. Return true if any initialization errors are
1810 /// found.
1811 virtual bool initialize() { return false; }
1812
1813 /// Return true if the builder can use bundling/unbundling.
1814 virtual bool canUseBundlerUnbundler() const { return false; }
1815
1816 /// Return true if this builder is valid. We have a valid builder if we have
1817 /// associated device tool chains.
1818 bool isValid() { return !ToolChains.empty(); }
1819
1820 /// Return the associated offload kind.
1821 Action::OffloadKind getAssociatedOffloadKind() {
1822 return AssociatedOffloadKind;
1823 }
1824 };
1825
1826 /// \brief CUDA action builder. It injects device code in the host backend
1827 /// action.
1828 class CudaActionBuilder final : public DeviceActionBuilder {
1829 /// Flags to signal if the user requested host-only or device-only
1830 /// compilation.
1831 bool CompileHostOnly = false;
1832 bool CompileDeviceOnly = false;
1833
1834 /// List of GPU architectures to use in this compilation.
1835 SmallVector<CudaArch, 4> GpuArchList;
1836
1837 /// The CUDA actions for the current input.
1838 ActionList CudaDeviceActions;
1839
1840 /// The CUDA fat binary if it was generated for the current input.
1841 Action *CudaFatBinary = nullptr;
1842
1843 /// Flag that is set to true if this builder acted on the current input.
1844 bool IsActive = false;
1845
1846 public:
1847 CudaActionBuilder(Compilation &C, DerivedArgList &Args,
1848 const Driver::InputList &Inputs)
1849 : DeviceActionBuilder(C, Args, Inputs, Action::OFK_Cuda) {}
1850
1851 ActionBuilderReturnCode
1852 getDeviceDependences(OffloadAction::DeviceDependences &DA,
1853 phases::ID CurPhase, phases::ID FinalPhase,
1854 PhasesTy &Phases) override {
1855 if (!IsActive)
1856 return ABRT_Inactive;
1857
1858 // If we don't have more CUDA actions, we don't have any dependences to
1859 // create for the host.
1860 if (CudaDeviceActions.empty())
1861 return ABRT_Success;
1862
1863 assert(CudaDeviceActions.size() == GpuArchList.size() &&(static_cast <bool> (CudaDeviceActions.size() == GpuArchList
.size() && "Expecting one action per GPU architecture."
) ? void (0) : __assert_fail ("CudaDeviceActions.size() == GpuArchList.size() && \"Expecting one action per GPU architecture.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 1864, __extension__ __PRETTY_FUNCTION__))
1864 "Expecting one action per GPU architecture.")(static_cast <bool> (CudaDeviceActions.size() == GpuArchList
.size() && "Expecting one action per GPU architecture."
) ? void (0) : __assert_fail ("CudaDeviceActions.size() == GpuArchList.size() && \"Expecting one action per GPU architecture.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 1864, __extension__ __PRETTY_FUNCTION__))
;
1865 assert(!CompileHostOnly &&(static_cast <bool> (!CompileHostOnly && "Not expecting CUDA actions in host-only compilation."
) ? void (0) : __assert_fail ("!CompileHostOnly && \"Not expecting CUDA actions in host-only compilation.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 1866, __extension__ __PRETTY_FUNCTION__))
1866 "Not expecting CUDA actions in host-only compilation.")(static_cast <bool> (!CompileHostOnly && "Not expecting CUDA actions in host-only compilation."
) ? void (0) : __assert_fail ("!CompileHostOnly && \"Not expecting CUDA actions in host-only compilation.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 1866, __extension__ __PRETTY_FUNCTION__))
;
1867
1868 // If we are generating code for the device or we are in a backend phase,
1869 // we attempt to generate the fat binary. We compile each arch to ptx and
1870 // assemble to cubin, then feed the cubin *and* the ptx into a device
1871 // "link" action, which uses fatbinary to combine these cubins into one
1872 // fatbin. The fatbin is then an input to the host action if not in
1873 // device-only mode.
1874 if (CompileDeviceOnly || CurPhase == phases::Backend) {
1875 ActionList DeviceActions;
1876 for (unsigned I = 0, E = GpuArchList.size(); I != E; ++I) {
1877 // Produce the device action from the current phase up to the assemble
1878 // phase.
1879 for (auto Ph : Phases) {
1880 // Skip the phases that were already dealt with.
1881 if (Ph < CurPhase)
1882 continue;
1883 // We have to be consistent with the host final phase.
1884 if (Ph > FinalPhase)
1885 break;
1886
1887 CudaDeviceActions[I] = C.getDriver().ConstructPhaseAction(
1888 C, Args, Ph, CudaDeviceActions[I]);
1889
1890 if (Ph == phases::Assemble)
1891 break;
1892 }
1893
1894 // If we didn't reach the assemble phase, we can't generate the fat
1895 // binary. We don't need to generate the fat binary if we are not in
1896 // device-only mode.
1897 if (!isa<AssembleJobAction>(CudaDeviceActions[I]) ||
1898 CompileDeviceOnly)
1899 continue;
1900
1901 Action *AssembleAction = CudaDeviceActions[I];
1902 assert(AssembleAction->getType() == types::TY_Object)(static_cast <bool> (AssembleAction->getType() == types
::TY_Object) ? void (0) : __assert_fail ("AssembleAction->getType() == types::TY_Object"
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 1902, __extension__ __PRETTY_FUNCTION__))
;
1903 assert(AssembleAction->getInputs().size() == 1)(static_cast <bool> (AssembleAction->getInputs().size
() == 1) ? void (0) : __assert_fail ("AssembleAction->getInputs().size() == 1"
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 1903, __extension__ __PRETTY_FUNCTION__))
;
1904
1905 Action *BackendAction = AssembleAction->getInputs()[0];
1906 assert(BackendAction->getType() == types::TY_PP_Asm)(static_cast <bool> (BackendAction->getType() == types
::TY_PP_Asm) ? void (0) : __assert_fail ("BackendAction->getType() == types::TY_PP_Asm"
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 1906, __extension__ __PRETTY_FUNCTION__))
;
1907
1908 for (auto &A : {AssembleAction, BackendAction}) {
1909 OffloadAction::DeviceDependences DDep;
1910 DDep.add(*A, *ToolChains.front(), CudaArchToString(GpuArchList[I]),
1911 Action::OFK_Cuda);
1912 DeviceActions.push_back(
1913 C.MakeAction<OffloadAction>(DDep, A->getType()));
1914 }
1915 }
1916
1917 // We generate the fat binary if we have device input actions.
1918 if (!DeviceActions.empty()) {
1919 CudaFatBinary =
1920 C.MakeAction<LinkJobAction>(DeviceActions, types::TY_CUDA_FATBIN);
1921
1922 if (!CompileDeviceOnly) {
1923 DA.add(*CudaFatBinary, *ToolChains.front(), /*BoundArch=*/nullptr,
1924 Action::OFK_Cuda);
1925 // Clear the fat binary, it is already a dependence to an host
1926 // action.
1927 CudaFatBinary = nullptr;
1928 }
1929
1930 // Remove the CUDA actions as they are already connected to an host
1931 // action or fat binary.
1932 CudaDeviceActions.clear();
1933 }
1934
1935 // We avoid creating host action in device-only mode.
1936 return CompileDeviceOnly ? ABRT_Ignore_Host : ABRT_Success;
1937 } else if (CurPhase > phases::Backend) {
1938 // If we are past the backend phase and still have a device action, we
1939 // don't have to do anything as this action is already a device
1940 // top-level action.
1941 return ABRT_Success;
1942 }
1943
1944 assert(CurPhase < phases::Backend && "Generating single CUDA "(static_cast <bool> (CurPhase < phases::Backend &&
"Generating single CUDA " "instructions should only occur " "before the backend phase!"
) ? void (0) : __assert_fail ("CurPhase < phases::Backend && \"Generating single CUDA \" \"instructions should only occur \" \"before the backend phase!\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 1946, __extension__ __PRETTY_FUNCTION__))
1945 "instructions should only occur "(static_cast <bool> (CurPhase < phases::Backend &&
"Generating single CUDA " "instructions should only occur " "before the backend phase!"
) ? void (0) : __assert_fail ("CurPhase < phases::Backend && \"Generating single CUDA \" \"instructions should only occur \" \"before the backend phase!\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 1946, __extension__ __PRETTY_FUNCTION__))
1946 "before the backend phase!")(static_cast <bool> (CurPhase < phases::Backend &&
"Generating single CUDA " "instructions should only occur " "before the backend phase!"
) ? void (0) : __assert_fail ("CurPhase < phases::Backend && \"Generating single CUDA \" \"instructions should only occur \" \"before the backend phase!\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 1946, __extension__ __PRETTY_FUNCTION__))
;
1947
1948 // By default, we produce an action for each device arch.
1949 for (Action *&A : CudaDeviceActions)
1950 A = C.getDriver().ConstructPhaseAction(C, Args, CurPhase, A);
1951
1952 return ABRT_Success;
1953 }
1954
1955 ActionBuilderReturnCode addDeviceDepences(Action *HostAction) override {
1956 // While generating code for CUDA, we only depend on the host input action
1957 // to trigger the creation of all the CUDA device actions.
1958
1959 // If we are dealing with an input action, replicate it for each GPU
1960 // architecture. If we are in host-only mode we return 'success' so that
1961 // the host uses the CUDA offload kind.
1962 if (auto *IA = dyn_cast<InputAction>(HostAction)) {
1963 assert(!GpuArchList.empty() &&(static_cast <bool> (!GpuArchList.empty() && "We should have at least one GPU architecture."
) ? void (0) : __assert_fail ("!GpuArchList.empty() && \"We should have at least one GPU architecture.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 1964, __extension__ __PRETTY_FUNCTION__))
1964 "We should have at least one GPU architecture.")(static_cast <bool> (!GpuArchList.empty() && "We should have at least one GPU architecture."
) ? void (0) : __assert_fail ("!GpuArchList.empty() && \"We should have at least one GPU architecture.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 1964, __extension__ __PRETTY_FUNCTION__))
;
1965
1966 // If the host input is not CUDA, we don't need to bother about this
1967 // input.
1968 if (IA->getType() != types::TY_CUDA) {
1969 // The builder will ignore this input.
1970 IsActive = false;
1971 return ABRT_Inactive;
1972 }
1973
1974 // Set the flag to true, so that the builder acts on the current input.
1975 IsActive = true;
1976
1977 if (CompileHostOnly)
1978 return ABRT_Success;
1979
1980 // Replicate inputs for each GPU architecture.
1981 for (unsigned I = 0, E = GpuArchList.size(); I != E; ++I)
1982 CudaDeviceActions.push_back(C.MakeAction<InputAction>(
1983 IA->getInputArg(), types::TY_CUDA_DEVICE));
1984
1985 return ABRT_Success;
1986 }
1987
1988 return IsActive ? ABRT_Success : ABRT_Inactive;
1989 }
1990
1991 void appendTopLevelActions(ActionList &AL) override {
1992 // Utility to append actions to the top level list.
1993 auto AddTopLevel = [&](Action *A, CudaArch BoundArch) {
1994 OffloadAction::DeviceDependences Dep;
1995 Dep.add(*A, *ToolChains.front(), CudaArchToString(BoundArch),
1996 Action::OFK_Cuda);
1997 AL.push_back(C.MakeAction<OffloadAction>(Dep, A->getType()));
1998 };
1999
2000 // If we have a fat binary, add it to the list.
2001 if (CudaFatBinary) {
2002 AddTopLevel(CudaFatBinary, CudaArch::UNKNOWN);
2003 CudaDeviceActions.clear();
2004 CudaFatBinary = nullptr;
2005 return;
2006 }
2007
2008 if (CudaDeviceActions.empty())
2009 return;
2010
2011 // If we have CUDA actions at this point, that's because we have a have
2012 // partial compilation, so we should have an action for each GPU
2013 // architecture.
2014 assert(CudaDeviceActions.size() == GpuArchList.size() &&(static_cast <bool> (CudaDeviceActions.size() == GpuArchList
.size() && "Expecting one action per GPU architecture."
) ? void (0) : __assert_fail ("CudaDeviceActions.size() == GpuArchList.size() && \"Expecting one action per GPU architecture.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2015, __extension__ __PRETTY_FUNCTION__))
2015 "Expecting one action per GPU architecture.")(static_cast <bool> (CudaDeviceActions.size() == GpuArchList
.size() && "Expecting one action per GPU architecture."
) ? void (0) : __assert_fail ("CudaDeviceActions.size() == GpuArchList.size() && \"Expecting one action per GPU architecture.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2015, __extension__ __PRETTY_FUNCTION__))
;
2016 assert(ToolChains.size() == 1 &&(static_cast <bool> (ToolChains.size() == 1 && "Expecting to have a sing CUDA toolchain."
) ? void (0) : __assert_fail ("ToolChains.size() == 1 && \"Expecting to have a sing CUDA toolchain.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2017, __extension__ __PRETTY_FUNCTION__))
2017 "Expecting to have a sing CUDA toolchain.")(static_cast <bool> (ToolChains.size() == 1 && "Expecting to have a sing CUDA toolchain."
) ? void (0) : __assert_fail ("ToolChains.size() == 1 && \"Expecting to have a sing CUDA toolchain.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2017, __extension__ __PRETTY_FUNCTION__))
;
2018 for (unsigned I = 0, E = GpuArchList.size(); I != E; ++I)
2019 AddTopLevel(CudaDeviceActions[I], GpuArchList[I]);
2020
2021 CudaDeviceActions.clear();
2022 }
2023
2024 bool initialize() override {
2025 // We don't need to support CUDA.
2026 if (!C.hasOffloadToolChain<Action::OFK_Cuda>())
2027 return false;
2028
2029 const ToolChain *HostTC = C.getSingleOffloadToolChain<Action::OFK_Host>();
2030 assert(HostTC && "No toolchain for host compilation.")(static_cast <bool> (HostTC && "No toolchain for host compilation."
) ? void (0) : __assert_fail ("HostTC && \"No toolchain for host compilation.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2030, __extension__ __PRETTY_FUNCTION__))
;
2031 if (HostTC->getTriple().isNVPTX()) {
2032 // We do not support targeting NVPTX for host compilation. Throw
2033 // an error and abort pipeline construction early so we don't trip
2034 // asserts that assume device-side compilation.
2035 C.getDriver().Diag(diag::err_drv_cuda_nvptx_host);
2036 return true;
2037 }
2038
2039 ToolChains.push_back(C.getSingleOffloadToolChain<Action::OFK_Cuda>());
2040
2041 Arg *PartialCompilationArg = Args.getLastArg(
2042 options::OPT_cuda_host_only, options::OPT_cuda_device_only,
2043 options::OPT_cuda_compile_host_device);
2044 CompileHostOnly = PartialCompilationArg &&
2045 PartialCompilationArg->getOption().matches(
2046 options::OPT_cuda_host_only);
2047 CompileDeviceOnly = PartialCompilationArg &&
2048 PartialCompilationArg->getOption().matches(
2049 options::OPT_cuda_device_only);
2050
2051 // Collect all cuda_gpu_arch parameters, removing duplicates.
2052 std::set<CudaArch> GpuArchs;
2053 bool Error = false;
2054 for (Arg *A : Args) {
2055 if (!(A->getOption().matches(options::OPT_cuda_gpu_arch_EQ) ||
2056 A->getOption().matches(options::OPT_no_cuda_gpu_arch_EQ)))
2057 continue;
2058 A->claim();
2059
2060 const StringRef ArchStr = A->getValue();
2061 if (A->getOption().matches(options::OPT_no_cuda_gpu_arch_EQ) &&
2062 ArchStr == "all") {
2063 GpuArchs.clear();
2064 continue;
2065 }
2066 CudaArch Arch = StringToCudaArch(ArchStr);
2067 if (Arch == CudaArch::UNKNOWN) {
2068 C.getDriver().Diag(clang::diag::err_drv_cuda_bad_gpu_arch) << ArchStr;
2069 Error = true;
2070 } else if (A->getOption().matches(options::OPT_cuda_gpu_arch_EQ))
2071 GpuArchs.insert(Arch);
2072 else if (A->getOption().matches(options::OPT_no_cuda_gpu_arch_EQ))
2073 GpuArchs.erase(Arch);
2074 else
2075 llvm_unreachable("Unexpected option.")::llvm::llvm_unreachable_internal("Unexpected option.", "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2075)
;
2076 }
2077
2078 // Collect list of GPUs remaining in the set.
2079 for (CudaArch Arch : GpuArchs)
2080 GpuArchList.push_back(Arch);
2081
2082 // Default to sm_20 which is the lowest common denominator for
2083 // supported GPUs. sm_20 code should work correctly, if
2084 // suboptimally, on all newer GPUs.
2085 if (GpuArchList.empty())
2086 GpuArchList.push_back(CudaArch::SM_20);
2087
2088 return Error;
2089 }
2090 };
2091
2092 /// OpenMP action builder. The host bitcode is passed to the device frontend
2093 /// and all the device linked images are passed to the host link phase.
2094 class OpenMPActionBuilder final : public DeviceActionBuilder {
2095 /// The OpenMP actions for the current input.
2096 ActionList OpenMPDeviceActions;
2097
2098 /// The linker inputs obtained for each toolchain.
2099 SmallVector<ActionList, 8> DeviceLinkerInputs;
2100
2101 public:
2102 OpenMPActionBuilder(Compilation &C, DerivedArgList &Args,
2103 const Driver::InputList &Inputs)
2104 : DeviceActionBuilder(C, Args, Inputs, Action::OFK_OpenMP) {}
2105
2106 ActionBuilderReturnCode
2107 getDeviceDependences(OffloadAction::DeviceDependences &DA,
2108 phases::ID CurPhase, phases::ID FinalPhase,
2109 PhasesTy &Phases) override {
2110
2111 // We should always have an action for each input.
2112 assert(OpenMPDeviceActions.size() == ToolChains.size() &&(static_cast <bool> (OpenMPDeviceActions.size() == ToolChains
.size() && "Number of OpenMP actions and toolchains do not match."
) ? void (0) : __assert_fail ("OpenMPDeviceActions.size() == ToolChains.size() && \"Number of OpenMP actions and toolchains do not match.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2113, __extension__ __PRETTY_FUNCTION__))
2113 "Number of OpenMP actions and toolchains do not match.")(static_cast <bool> (OpenMPDeviceActions.size() == ToolChains
.size() && "Number of OpenMP actions and toolchains do not match."
) ? void (0) : __assert_fail ("OpenMPDeviceActions.size() == ToolChains.size() && \"Number of OpenMP actions and toolchains do not match.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2113, __extension__ __PRETTY_FUNCTION__))
;
2114
2115 // The host only depends on device action in the linking phase, when all
2116 // the device images have to be embedded in the host image.
2117 if (CurPhase == phases::Link) {
2118 assert(ToolChains.size() == DeviceLinkerInputs.size() &&(static_cast <bool> (ToolChains.size() == DeviceLinkerInputs
.size() && "Toolchains and linker inputs sizes do not match."
) ? void (0) : __assert_fail ("ToolChains.size() == DeviceLinkerInputs.size() && \"Toolchains and linker inputs sizes do not match.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2119, __extension__ __PRETTY_FUNCTION__))
2119 "Toolchains and linker inputs sizes do not match.")(static_cast <bool> (ToolChains.size() == DeviceLinkerInputs
.size() && "Toolchains and linker inputs sizes do not match."
) ? void (0) : __assert_fail ("ToolChains.size() == DeviceLinkerInputs.size() && \"Toolchains and linker inputs sizes do not match.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2119, __extension__ __PRETTY_FUNCTION__))
;
2120 auto LI = DeviceLinkerInputs.begin();
2121 for (auto *A : OpenMPDeviceActions) {
2122 LI->push_back(A);
2123 ++LI;
2124 }
2125
2126 // We passed the device action as a host dependence, so we don't need to
2127 // do anything else with them.
2128 OpenMPDeviceActions.clear();
2129 return ABRT_Success;
2130 }
2131
2132 // By default, we produce an action for each device arch.
2133 for (Action *&A : OpenMPDeviceActions)
2134 A = C.getDriver().ConstructPhaseAction(C, Args, CurPhase, A);
2135
2136 return ABRT_Success;
2137 }
2138
2139 ActionBuilderReturnCode addDeviceDepences(Action *HostAction) override {
2140
2141 // If this is an input action replicate it for each OpenMP toolchain.
2142 if (auto *IA = dyn_cast<InputAction>(HostAction)) {
2143 OpenMPDeviceActions.clear();
2144 for (unsigned I = 0; I < ToolChains.size(); ++I)
2145 OpenMPDeviceActions.push_back(
2146 C.MakeAction<InputAction>(IA->getInputArg(), IA->getType()));
2147 return ABRT_Success;
2148 }
2149
2150 // If this is an unbundling action use it as is for each OpenMP toolchain.
2151 if (auto *UA = dyn_cast<OffloadUnbundlingJobAction>(HostAction)) {
2152 OpenMPDeviceActions.clear();
2153 for (unsigned I = 0; I < ToolChains.size(); ++I) {
2154 OpenMPDeviceActions.push_back(UA);
2155 UA->registerDependentActionInfo(
2156 ToolChains[I], /*BoundArch=*/StringRef(), Action::OFK_OpenMP);
2157 }
2158 return ABRT_Success;
2159 }
2160
2161 // When generating code for OpenMP we use the host compile phase result as
2162 // a dependence to the device compile phase so that it can learn what
2163 // declarations should be emitted. However, this is not the only use for
2164 // the host action, so we prevent it from being collapsed.
2165 if (isa<CompileJobAction>(HostAction)) {
2166 HostAction->setCannotBeCollapsedWithNextDependentAction();
2167 assert(ToolChains.size() == OpenMPDeviceActions.size() &&(static_cast <bool> (ToolChains.size() == OpenMPDeviceActions
.size() && "Toolchains and device action sizes do not match."
) ? void (0) : __assert_fail ("ToolChains.size() == OpenMPDeviceActions.size() && \"Toolchains and device action sizes do not match.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2168, __extension__ __PRETTY_FUNCTION__))
2168 "Toolchains and device action sizes do not match.")(static_cast <bool> (ToolChains.size() == OpenMPDeviceActions
.size() && "Toolchains and device action sizes do not match."
) ? void (0) : __assert_fail ("ToolChains.size() == OpenMPDeviceActions.size() && \"Toolchains and device action sizes do not match.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2168, __extension__ __PRETTY_FUNCTION__))
;
2169 OffloadAction::HostDependence HDep(
2170 *HostAction, *C.getSingleOffloadToolChain<Action::OFK_Host>(),
2171 /*BoundArch=*/nullptr, Action::OFK_OpenMP);
2172 auto TC = ToolChains.begin();
2173 for (Action *&A : OpenMPDeviceActions) {
2174 assert(isa<CompileJobAction>(A))(static_cast <bool> (isa<CompileJobAction>(A)) ? void
(0) : __assert_fail ("isa<CompileJobAction>(A)", "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2174, __extension__ __PRETTY_FUNCTION__))
;
2175 OffloadAction::DeviceDependences DDep;
2176 DDep.add(*A, **TC, /*BoundArch=*/nullptr, Action::OFK_OpenMP);
2177 A = C.MakeAction<OffloadAction>(HDep, DDep);
2178 ++TC;
2179 }
2180 }
2181 return ABRT_Success;
2182 }
2183
2184 void appendTopLevelActions(ActionList &AL) override {
2185 if (OpenMPDeviceActions.empty())
2186 return;
2187
2188 // We should always have an action for each input.
2189 assert(OpenMPDeviceActions.size() == ToolChains.size() &&(static_cast <bool> (OpenMPDeviceActions.size() == ToolChains
.size() && "Number of OpenMP actions and toolchains do not match."
) ? void (0) : __assert_fail ("OpenMPDeviceActions.size() == ToolChains.size() && \"Number of OpenMP actions and toolchains do not match.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2190, __extension__ __PRETTY_FUNCTION__))
2190 "Number of OpenMP actions and toolchains do not match.")(static_cast <bool> (OpenMPDeviceActions.size() == ToolChains
.size() && "Number of OpenMP actions and toolchains do not match."
) ? void (0) : __assert_fail ("OpenMPDeviceActions.size() == ToolChains.size() && \"Number of OpenMP actions and toolchains do not match.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2190, __extension__ __PRETTY_FUNCTION__))
;
2191
2192 // Append all device actions followed by the proper offload action.
2193 auto TI = ToolChains.begin();
2194 for (auto *A : OpenMPDeviceActions) {
2195 OffloadAction::DeviceDependences Dep;
2196 Dep.add(*A, **TI, /*BoundArch=*/nullptr, Action::OFK_OpenMP);
2197 AL.push_back(C.MakeAction<OffloadAction>(Dep, A->getType()));
2198 ++TI;
2199 }
2200 // We no longer need the action stored in this builder.
2201 OpenMPDeviceActions.clear();
2202 }
2203
2204 void appendLinkDependences(OffloadAction::DeviceDependences &DA) override {
2205 assert(ToolChains.size() == DeviceLinkerInputs.size() &&(static_cast <bool> (ToolChains.size() == DeviceLinkerInputs
.size() && "Toolchains and linker inputs sizes do not match."
) ? void (0) : __assert_fail ("ToolChains.size() == DeviceLinkerInputs.size() && \"Toolchains and linker inputs sizes do not match.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2206, __extension__ __PRETTY_FUNCTION__))
2206 "Toolchains and linker inputs sizes do not match.")(static_cast <bool> (ToolChains.size() == DeviceLinkerInputs
.size() && "Toolchains and linker inputs sizes do not match."
) ? void (0) : __assert_fail ("ToolChains.size() == DeviceLinkerInputs.size() && \"Toolchains and linker inputs sizes do not match.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2206, __extension__ __PRETTY_FUNCTION__))
;
2207
2208 // Append a new link action for each device.
2209 auto TC = ToolChains.begin();
2210 for (auto &LI : DeviceLinkerInputs) {
2211 auto *DeviceLinkAction =
2212 C.MakeAction<LinkJobAction>(LI, types::TY_Image);
2213 DA.add(*DeviceLinkAction, **TC, /*BoundArch=*/nullptr,
2214 Action::OFK_OpenMP);
2215 ++TC;
2216 }
2217 }
2218
2219 bool initialize() override {
2220 // Get the OpenMP toolchains. If we don't get any, the action builder will
2221 // know there is nothing to do related to OpenMP offloading.
2222 auto OpenMPTCRange = C.getOffloadToolChains<Action::OFK_OpenMP>();
2223 for (auto TI = OpenMPTCRange.first, TE = OpenMPTCRange.second; TI != TE;
2224 ++TI)
2225 ToolChains.push_back(TI->second);
2226
2227 DeviceLinkerInputs.resize(ToolChains.size());
2228 return false;
2229 }
2230
2231 bool canUseBundlerUnbundler() const override {
2232 // OpenMP should use bundled files whenever possible.
2233 return true;
2234 }
2235 };
2236
2237 ///
2238 /// TODO: Add the implementation for other specialized builders here.
2239 ///
2240
2241 /// Specialized builders being used by this offloading action builder.
2242 SmallVector<DeviceActionBuilder *, 4> SpecializedBuilders;
2243
2244 /// Flag set to true if all valid builders allow file bundling/unbundling.
2245 bool CanUseBundler;
2246
2247public:
2248 OffloadingActionBuilder(Compilation &C, DerivedArgList &Args,
2249 const Driver::InputList &Inputs)
2250 : C(C) {
2251 // Create a specialized builder for each device toolchain.
2252
2253 IsValid = true;
2254
2255 // Create a specialized builder for CUDA.
2256 SpecializedBuilders.push_back(new CudaActionBuilder(C, Args, Inputs));
2257
2258 // Create a specialized builder for OpenMP.
2259 SpecializedBuilders.push_back(new OpenMPActionBuilder(C, Args, Inputs));
2260
2261 //
2262 // TODO: Build other specialized builders here.
2263 //
2264
2265 // Initialize all the builders, keeping track of errors. If all valid
2266 // builders agree that we can use bundling, set the flag to true.
2267 unsigned ValidBuilders = 0u;
2268 unsigned ValidBuildersSupportingBundling = 0u;
2269 for (auto *SB : SpecializedBuilders) {
2270 IsValid = IsValid && !SB->initialize();
2271
2272 // Update the counters if the builder is valid.
2273 if (SB->isValid()) {
2274 ++ValidBuilders;
2275 if (SB->canUseBundlerUnbundler())
2276 ++ValidBuildersSupportingBundling;
2277 }
2278 }
2279 CanUseBundler =
2280 ValidBuilders && ValidBuilders == ValidBuildersSupportingBundling;
2281 }
2282
2283 ~OffloadingActionBuilder() {
2284 for (auto *SB : SpecializedBuilders)
2285 delete SB;
2286 }
2287
2288 /// Generate an action that adds device dependences (if any) to a host action.
2289 /// If no device dependence actions exist, just return the host action \a
2290 /// HostAction. If an error is found or if no builder requires the host action
2291 /// to be generated, return nullptr.
2292 Action *
2293 addDeviceDependencesToHostAction(Action *HostAction, const Arg *InputArg,
2294 phases::ID CurPhase, phases::ID FinalPhase,
2295 DeviceActionBuilder::PhasesTy &Phases) {
2296 if (!IsValid)
2297 return nullptr;
2298
2299 if (SpecializedBuilders.empty())
2300 return HostAction;
2301
2302 assert(HostAction && "Invalid host action!")(static_cast <bool> (HostAction && "Invalid host action!"
) ? void (0) : __assert_fail ("HostAction && \"Invalid host action!\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2302, __extension__ __PRETTY_FUNCTION__))
;
2303
2304 OffloadAction::DeviceDependences DDeps;
2305 // Check if all the programming models agree we should not emit the host
2306 // action. Also, keep track of the offloading kinds employed.
2307 auto &OffloadKind = InputArgToOffloadKindMap[InputArg];
2308 unsigned InactiveBuilders = 0u;
2309 unsigned IgnoringBuilders = 0u;
2310 for (auto *SB : SpecializedBuilders) {
2311 if (!SB->isValid()) {
2312 ++InactiveBuilders;
2313 continue;
2314 }
2315
2316 auto RetCode =
2317 SB->getDeviceDependences(DDeps, CurPhase, FinalPhase, Phases);
2318
2319 // If the builder explicitly says the host action should be ignored,
2320 // we need to increment the variable that tracks the builders that request
2321 // the host object to be ignored.
2322 if (RetCode == DeviceActionBuilder::ABRT_Ignore_Host)
2323 ++IgnoringBuilders;
2324
2325 // Unless the builder was inactive for this action, we have to record the
2326 // offload kind because the host will have to use it.
2327 if (RetCode != DeviceActionBuilder::ABRT_Inactive)
2328 OffloadKind |= SB->getAssociatedOffloadKind();
2329 }
2330
2331 // If all builders agree that the host object should be ignored, just return
2332 // nullptr.
2333 if (IgnoringBuilders &&
2334 SpecializedBuilders.size() == (InactiveBuilders + IgnoringBuilders))
2335 return nullptr;
2336
2337 if (DDeps.getActions().empty())
2338 return HostAction;
2339
2340 // We have dependences we need to bundle together. We use an offload action
2341 // for that.
2342 OffloadAction::HostDependence HDep(
2343 *HostAction, *C.getSingleOffloadToolChain<Action::OFK_Host>(),
2344 /*BoundArch=*/nullptr, DDeps);
2345 return C.MakeAction<OffloadAction>(HDep, DDeps);
2346 }
2347
2348 /// Generate an action that adds a host dependence to a device action. The
2349 /// results will be kept in this action builder. Return true if an error was
2350 /// found.
2351 bool addHostDependenceToDeviceActions(Action *&HostAction,
2352 const Arg *InputArg) {
2353 if (!IsValid)
2354 return true;
2355
2356 // If we are supporting bundling/unbundling and the current action is an
2357 // input action of non-source file, we replace the host action by the
2358 // unbundling action. The bundler tool has the logic to detect if an input
2359 // is a bundle or not and if the input is not a bundle it assumes it is a
2360 // host file. Therefore it is safe to create an unbundling action even if
2361 // the input is not a bundle.
2362 if (CanUseBundler && isa<InputAction>(HostAction) &&
2363 InputArg->getOption().getKind() == llvm::opt::Option::InputClass &&
2364 !types::isSrcFile(HostAction->getType())) {
2365 auto UnbundlingHostAction =
2366 C.MakeAction<OffloadUnbundlingJobAction>(HostAction);
2367 UnbundlingHostAction->registerDependentActionInfo(
2368 C.getSingleOffloadToolChain<Action::OFK_Host>(),
2369 /*BoundArch=*/StringRef(), Action::OFK_Host);
2370 HostAction = UnbundlingHostAction;
2371 }
2372
2373 assert(HostAction && "Invalid host action!")(static_cast <bool> (HostAction && "Invalid host action!"
) ? void (0) : __assert_fail ("HostAction && \"Invalid host action!\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2373, __extension__ __PRETTY_FUNCTION__))
;
2374
2375 // Register the offload kinds that are used.
2376 auto &OffloadKind = InputArgToOffloadKindMap[InputArg];
2377 for (auto *SB : SpecializedBuilders) {
2378 if (!SB->isValid())
2379 continue;
2380
2381 auto RetCode = SB->addDeviceDepences(HostAction);
2382
2383 // Host dependences for device actions are not compatible with that same
2384 // action being ignored.
2385 assert(RetCode != DeviceActionBuilder::ABRT_Ignore_Host &&(static_cast <bool> (RetCode != DeviceActionBuilder::ABRT_Ignore_Host
&& "Host dependence not expected to be ignored.!") ?
void (0) : __assert_fail ("RetCode != DeviceActionBuilder::ABRT_Ignore_Host && \"Host dependence not expected to be ignored.!\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2386, __extension__ __PRETTY_FUNCTION__))
2386 "Host dependence not expected to be ignored.!")(static_cast <bool> (RetCode != DeviceActionBuilder::ABRT_Ignore_Host
&& "Host dependence not expected to be ignored.!") ?
void (0) : __assert_fail ("RetCode != DeviceActionBuilder::ABRT_Ignore_Host && \"Host dependence not expected to be ignored.!\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2386, __extension__ __PRETTY_FUNCTION__))
;
2387
2388 // Unless the builder was inactive for this action, we have to record the
2389 // offload kind because the host will have to use it.
2390 if (RetCode != DeviceActionBuilder::ABRT_Inactive)
2391 OffloadKind |= SB->getAssociatedOffloadKind();
2392 }
2393
2394 return false;
2395 }
2396
2397 /// Add the offloading top level actions to the provided action list. This
2398 /// function can replace the host action by a bundling action if the
2399 /// programming models allow it.
2400 bool appendTopLevelActions(ActionList &AL, Action *HostAction,
2401 const Arg *InputArg) {
2402 // Get the device actions to be appended.
2403 ActionList OffloadAL;
2404 for (auto *SB : SpecializedBuilders) {
2405 if (!SB->isValid())
2406 continue;
2407 SB->appendTopLevelActions(OffloadAL);
2408 }
2409
2410 // If we can use the bundler, replace the host action by the bundling one in
2411 // the resulting list. Otherwise, just append the device actions.
2412 if (CanUseBundler && !OffloadAL.empty()) {
2413 // Add the host action to the list in order to create the bundling action.
2414 OffloadAL.push_back(HostAction);
2415
2416 // We expect that the host action was just appended to the action list
2417 // before this method was called.
2418 assert(HostAction == AL.back() && "Host action not in the list??")(static_cast <bool> (HostAction == AL.back() &&
"Host action not in the list??") ? void (0) : __assert_fail (
"HostAction == AL.back() && \"Host action not in the list??\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2418, __extension__ __PRETTY_FUNCTION__))
;
2419 HostAction = C.MakeAction<OffloadBundlingJobAction>(OffloadAL);
2420 AL.back() = HostAction;
2421 } else
2422 AL.append(OffloadAL.begin(), OffloadAL.end());
2423
2424 // Propagate to the current host action (if any) the offload information
2425 // associated with the current input.
2426 if (HostAction)
2427 HostAction->propagateHostOffloadInfo(InputArgToOffloadKindMap[InputArg],
2428 /*BoundArch=*/nullptr);
2429 return false;
2430 }
2431
2432 /// Processes the host linker action. This currently consists of replacing it
2433 /// with an offload action if there are device link objects and propagate to
2434 /// the host action all the offload kinds used in the current compilation. The
2435 /// resulting action is returned.
2436 Action *processHostLinkAction(Action *HostAction) {
2437 // Add all the dependences from the device linking actions.
2438 OffloadAction::DeviceDependences DDeps;
2439 for (auto *SB : SpecializedBuilders) {
2440 if (!SB->isValid())
2441 continue;
2442
2443 SB->appendLinkDependences(DDeps);
2444 }
2445
2446 // Calculate all the offload kinds used in the current compilation.
2447 unsigned ActiveOffloadKinds = 0u;
2448 for (auto &I : InputArgToOffloadKindMap)
2449 ActiveOffloadKinds |= I.second;
2450
2451 // If we don't have device dependencies, we don't have to create an offload
2452 // action.
2453 if (DDeps.getActions().empty()) {
2454 // Propagate all the active kinds to host action. Given that it is a link
2455 // action it is assumed to depend on all actions generated so far.
2456 HostAction->propagateHostOffloadInfo(ActiveOffloadKinds,
2457 /*BoundArch=*/nullptr);
2458 return HostAction;
2459 }
2460
2461 // Create the offload action with all dependences. When an offload action
2462 // is created the kinds are propagated to the host action, so we don't have
2463 // to do that explicitly here.
2464 OffloadAction::HostDependence HDep(
2465 *HostAction, *C.getSingleOffloadToolChain<Action::OFK_Host>(),
2466 /*BoundArch*/ nullptr, ActiveOffloadKinds);
2467 return C.MakeAction<OffloadAction>(HDep, DDeps);
2468 }
2469};
2470} // anonymous namespace.
2471
2472void Driver::BuildActions(Compilation &C, DerivedArgList &Args,
2473 const InputList &Inputs, ActionList &Actions) const {
2474 llvm::PrettyStackTraceString CrashInfo("Building compilation actions");
2475
2476 if (!SuppressMissingInputWarning && Inputs.empty()) {
2477 Diag(clang::diag::err_drv_no_input_files);
2478 return;
2479 }
2480
2481 Arg *FinalPhaseArg;
2482 phases::ID FinalPhase = getFinalPhase(Args, &FinalPhaseArg);
2483
2484 if (FinalPhase == phases::Link) {
2485 if (Args.hasArg(options::OPT_emit_llvm))
2486 Diag(clang::diag::err_drv_emit_llvm_link);
2487 if (IsCLMode() && LTOMode != LTOK_None &&
2488 !Args.getLastArgValue(options::OPT_fuse_ld_EQ).equals_lower("lld"))
2489 Diag(clang::diag::err_drv_lto_without_lld);
2490 }
2491
2492 // Reject -Z* at the top level, these options should never have been exposed
2493 // by gcc.
2494 if (Arg *A = Args.getLastArg(options::OPT_Z_Joined))
2495 Diag(clang::diag::err_drv_use_of_Z_option) << A->getAsString(Args);
2496
2497 // Diagnose misuse of /Fo.
2498 if (Arg *A = Args.getLastArg(options::OPT__SLASH_Fo)) {
2499 StringRef V = A->getValue();
2500 if (Inputs.size() > 1 && !V.empty() &&
2501 !llvm::sys::path::is_separator(V.back())) {
2502 // Check whether /Fo tries to name an output file for multiple inputs.
2503 Diag(clang::diag::err_drv_out_file_argument_with_multiple_sources)
2504 << A->getSpelling() << V;
2505 Args.eraseArg(options::OPT__SLASH_Fo);
2506 }
2507 }
2508
2509 // Diagnose misuse of /Fa.
2510 if (Arg *A = Args.getLastArg(options::OPT__SLASH_Fa)) {
2511 StringRef V = A->getValue();
2512 if (Inputs.size() > 1 && !V.empty() &&
2513 !llvm::sys::path::is_separator(V.back())) {
2514 // Check whether /Fa tries to name an asm file for multiple inputs.
2515 Diag(clang::diag::err_drv_out_file_argument_with_multiple_sources)
2516 << A->getSpelling() << V;
2517 Args.eraseArg(options::OPT__SLASH_Fa);
2518 }
2519 }
2520
2521 // Diagnose misuse of /o.
2522 if (Arg *A = Args.getLastArg(options::OPT__SLASH_o)) {
2523 if (A->getValue()[0] == '\0') {
2524 // It has to have a value.
2525 Diag(clang::diag::err_drv_missing_argument) << A->getSpelling() << 1;
2526 Args.eraseArg(options::OPT__SLASH_o);
2527 }
2528 }
2529
2530 // Diagnose unsupported forms of /Yc /Yu. Ignore /Yc/Yu for now if:
2531 // * no filename after it
2532 // * both /Yc and /Yu passed but with different filenames
2533 // * corresponding file not also passed as /FI
2534 Arg *YcArg = Args.getLastArg(options::OPT__SLASH_Yc);
2535 Arg *YuArg = Args.getLastArg(options::OPT__SLASH_Yu);
2536 if (YcArg && YcArg->getValue()[0] == '\0') {
2537 Diag(clang::diag::warn_drv_ycyu_no_arg_clang_cl) << YcArg->getSpelling();
2538 Args.eraseArg(options::OPT__SLASH_Yc);
2539 YcArg = nullptr;
2540 }
2541 if (YuArg && YuArg->getValue()[0] == '\0') {
2542 Diag(clang::diag::warn_drv_ycyu_no_arg_clang_cl) << YuArg->getSpelling();
2543 Args.eraseArg(options::OPT__SLASH_Yu);
2544 YuArg = nullptr;
2545 }
2546 if (YcArg && YuArg && strcmp(YcArg->getValue(), YuArg->getValue()) != 0) {
2547 Diag(clang::diag::warn_drv_ycyu_different_arg_clang_cl);
2548 Args.eraseArg(options::OPT__SLASH_Yc);
2549 Args.eraseArg(options::OPT__SLASH_Yu);
2550 YcArg = YuArg = nullptr;
2551 }
2552 if (YcArg || YuArg) {
2553 StringRef Val = YcArg ? YcArg->getValue() : YuArg->getValue();
2554 bool FoundMatchingInclude = false;
2555 for (const Arg *Inc : Args.filtered(options::OPT_include)) {
2556 // FIXME: Do case-insensitive matching and consider / and \ as equal.
2557 if (Inc->getValue() == Val)
2558 FoundMatchingInclude = true;
2559 }
2560 if (!FoundMatchingInclude) {
2561 Diag(clang::diag::warn_drv_ycyu_no_fi_arg_clang_cl)
2562 << (YcArg ? YcArg : YuArg)->getSpelling();
2563 Args.eraseArg(options::OPT__SLASH_Yc);
2564 Args.eraseArg(options::OPT__SLASH_Yu);
2565 YcArg = YuArg = nullptr;
2566 }
2567 }
2568 if (YcArg && Inputs.size() > 1) {
2569 Diag(clang::diag::warn_drv_yc_multiple_inputs_clang_cl);
2570 Args.eraseArg(options::OPT__SLASH_Yc);
2571 YcArg = nullptr;
2572 }
2573 if (Args.hasArg(options::OPT__SLASH_Y_)) {
2574 // /Y- disables all pch handling. Rather than check for it everywhere,
2575 // just remove clang-cl pch-related flags here.
2576 Args.eraseArg(options::OPT__SLASH_Fp);
2577 Args.eraseArg(options::OPT__SLASH_Yc);
2578 Args.eraseArg(options::OPT__SLASH_Yu);
2579 YcArg = YuArg = nullptr;
2580 }
2581
2582 // Builder to be used to build offloading actions.
2583 OffloadingActionBuilder OffloadBuilder(C, Args, Inputs);
2584
2585 // Construct the actions to perform.
2586 ActionList LinkerInputs;
2587
2588 llvm::SmallVector<phases::ID, phases::MaxNumberOfPhases> PL;
2589 for (auto &I : Inputs) {
2590 types::ID InputType = I.first;
2591 const Arg *InputArg = I.second;
2592
2593 PL.clear();
2594 types::getCompilationPhases(InputType, PL);
2595
2596 // If the first step comes after the final phase we are doing as part of
2597 // this compilation, warn the user about it.
2598 phases::ID InitialPhase = PL[0];
2599 if (InitialPhase > FinalPhase) {
2600 // Claim here to avoid the more general unused warning.
2601 InputArg->claim();
2602
2603 // Suppress all unused style warnings with -Qunused-arguments
2604 if (Args.hasArg(options::OPT_Qunused_arguments))
2605 continue;
2606
2607 // Special case when final phase determined by binary name, rather than
2608 // by a command-line argument with a corresponding Arg.
2609 if (CCCIsCPP())
2610 Diag(clang::diag::warn_drv_input_file_unused_by_cpp)
2611 << InputArg->getAsString(Args) << getPhaseName(InitialPhase);
2612 // Special case '-E' warning on a previously preprocessed file to make
2613 // more sense.
2614 else if (InitialPhase == phases::Compile &&
2615 FinalPhase == phases::Preprocess &&
2616 getPreprocessedType(InputType) == types::TY_INVALID)
2617 Diag(clang::diag::warn_drv_preprocessed_input_file_unused)
2618 << InputArg->getAsString(Args) << !!FinalPhaseArg
2619 << (FinalPhaseArg ? FinalPhaseArg->getOption().getName() : "");
2620 else
2621 Diag(clang::diag::warn_drv_input_file_unused)
2622 << InputArg->getAsString(Args) << getPhaseName(InitialPhase)
2623 << !!FinalPhaseArg
2624 << (FinalPhaseArg ? FinalPhaseArg->getOption().getName() : "");
2625 continue;
2626 }
2627
2628 if (YcArg) {
2629 // Add a separate precompile phase for the compile phase.
2630 if (FinalPhase >= phases::Compile) {
2631 const types::ID HeaderType = lookupHeaderTypeForSourceType(InputType);
2632 llvm::SmallVector<phases::ID, phases::MaxNumberOfPhases> PCHPL;
2633 types::getCompilationPhases(HeaderType, PCHPL);
2634 Arg *PchInputArg = MakeInputArg(Args, *Opts, YcArg->getValue());
2635
2636 // Build the pipeline for the pch file.
2637 Action *ClangClPch =
2638 C.MakeAction<InputAction>(*PchInputArg, HeaderType);
2639 for (phases::ID Phase : PCHPL)
2640 ClangClPch = ConstructPhaseAction(C, Args, Phase, ClangClPch);
2641 assert(ClangClPch)(static_cast <bool> (ClangClPch) ? void (0) : __assert_fail
("ClangClPch", "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2641, __extension__ __PRETTY_FUNCTION__))
;
2642 Actions.push_back(ClangClPch);
2643 // The driver currently exits after the first failed command. This
2644 // relies on that behavior, to make sure if the pch generation fails,
2645 // the main compilation won't run.
2646 }
2647 }
2648
2649 // Build the pipeline for this file.
2650 Action *Current = C.MakeAction<InputAction>(*InputArg, InputType);
2651
2652 // Use the current host action in any of the offloading actions, if
2653 // required.
2654 if (OffloadBuilder.addHostDependenceToDeviceActions(Current, InputArg))
2655 break;
2656
2657 for (SmallVectorImpl<phases::ID>::iterator i = PL.begin(), e = PL.end();
2658 i != e; ++i) {
2659 phases::ID Phase = *i;
2660
2661 // We are done if this step is past what the user requested.
2662 if (Phase > FinalPhase)
2663 break;
2664
2665 // Add any offload action the host action depends on.
2666 Current = OffloadBuilder.addDeviceDependencesToHostAction(
2667 Current, InputArg, Phase, FinalPhase, PL);
2668 if (!Current)
2669 break;
2670
2671 // Queue linker inputs.
2672 if (Phase == phases::Link) {
2673 assert((i + 1) == e && "linking must be final compilation step.")(static_cast <bool> ((i + 1) == e && "linking must be final compilation step."
) ? void (0) : __assert_fail ("(i + 1) == e && \"linking must be final compilation step.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2673, __extension__ __PRETTY_FUNCTION__))
;
2674 LinkerInputs.push_back(Current);
2675 Current = nullptr;
2676 break;
2677 }
2678
2679 // Otherwise construct the appropriate action.
2680 auto *NewCurrent = ConstructPhaseAction(C, Args, Phase, Current);
2681
2682 // We didn't create a new action, so we will just move to the next phase.
2683 if (NewCurrent == Current)
2684 continue;
2685
2686 Current = NewCurrent;
2687
2688 // Use the current host action in any of the offloading actions, if
2689 // required.
2690 if (OffloadBuilder.addHostDependenceToDeviceActions(Current, InputArg))
2691 break;
2692
2693 if (Current->getType() == types::TY_Nothing)
2694 break;
2695 }
2696
2697 // If we ended with something, add to the output list.
2698 if (Current)
2699 Actions.push_back(Current);
2700
2701 // Add any top level actions generated for offloading.
2702 OffloadBuilder.appendTopLevelActions(Actions, Current, InputArg);
2703 }
2704
2705 // Add a link action if necessary.
2706 if (!LinkerInputs.empty()) {
2707 Action *LA = C.MakeAction<LinkJobAction>(LinkerInputs, types::TY_Image);
2708 LA = OffloadBuilder.processHostLinkAction(LA);
2709 Actions.push_back(LA);
2710 }
2711
2712 // If we are linking, claim any options which are obviously only used for
2713 // compilation.
2714 if (FinalPhase == phases::Link && PL.size() == 1) {
2715 Args.ClaimAllArgs(options::OPT_CompileOnly_Group);
2716 Args.ClaimAllArgs(options::OPT_cl_compile_Group);
2717 }
2718
2719 // Claim ignored clang-cl options.
2720 Args.ClaimAllArgs(options::OPT_cl_ignored_Group);
2721
2722 // Claim --cuda-host-only and --cuda-compile-host-device, which may be passed
2723 // to non-CUDA compilations and should not trigger warnings there.
2724 Args.ClaimAllArgs(options::OPT_cuda_host_only);
2725 Args.ClaimAllArgs(options::OPT_cuda_compile_host_device);
2726}
2727
2728Action *Driver::ConstructPhaseAction(Compilation &C, const ArgList &Args,
2729 phases::ID Phase, Action *Input) const {
2730 llvm::PrettyStackTraceString CrashInfo("Constructing phase actions");
2731
2732 // Some types skip the assembler phase (e.g., llvm-bc), but we can't
2733 // encode this in the steps because the intermediate type depends on
2734 // arguments. Just special case here.
2735 if (Phase == phases::Assemble && Input->getType() != types::TY_PP_Asm)
2736 return Input;
2737
2738 // Build the appropriate action.
2739 switch (Phase) {
2740 case phases::Link:
2741 llvm_unreachable("link action invalid here.")::llvm::llvm_unreachable_internal("link action invalid here."
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2741)
;
2742 case phases::Preprocess: {
2743 types::ID OutputTy;
2744 // -{M, MM} alter the output type.
2745 if (Args.hasArg(options::OPT_M, options::OPT_MM)) {
2746 OutputTy = types::TY_Dependencies;
2747 } else {
2748 OutputTy = Input->getType();
2749 if (!Args.hasFlag(options::OPT_frewrite_includes,
2750 options::OPT_fno_rewrite_includes, false) &&
2751 !Args.hasFlag(options::OPT_frewrite_imports,
2752 options::OPT_fno_rewrite_imports, false) &&
2753 !CCGenDiagnostics)
2754 OutputTy = types::getPreprocessedType(OutputTy);
2755 assert(OutputTy != types::TY_INVALID &&(static_cast <bool> (OutputTy != types::TY_INVALID &&
"Cannot preprocess this input type!") ? void (0) : __assert_fail
("OutputTy != types::TY_INVALID && \"Cannot preprocess this input type!\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2756, __extension__ __PRETTY_FUNCTION__))
2756 "Cannot preprocess this input type!")(static_cast <bool> (OutputTy != types::TY_INVALID &&
"Cannot preprocess this input type!") ? void (0) : __assert_fail
("OutputTy != types::TY_INVALID && \"Cannot preprocess this input type!\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2756, __extension__ __PRETTY_FUNCTION__))
;
2757 }
2758 return C.MakeAction<PreprocessJobAction>(Input, OutputTy);
2759 }
2760 case phases::Precompile: {
2761 types::ID OutputTy = getPrecompiledType(Input->getType());
2762 assert(OutputTy != types::TY_INVALID &&(static_cast <bool> (OutputTy != types::TY_INVALID &&
"Cannot precompile this input type!") ? void (0) : __assert_fail
("OutputTy != types::TY_INVALID && \"Cannot precompile this input type!\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2763, __extension__ __PRETTY_FUNCTION__))
2763 "Cannot precompile this input type!")(static_cast <bool> (OutputTy != types::TY_INVALID &&
"Cannot precompile this input type!") ? void (0) : __assert_fail
("OutputTy != types::TY_INVALID && \"Cannot precompile this input type!\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2763, __extension__ __PRETTY_FUNCTION__))
;
2764 if (Args.hasArg(options::OPT_fsyntax_only)) {
2765 // Syntax checks should not emit a PCH file
2766 OutputTy = types::TY_Nothing;
2767 }
2768 return C.MakeAction<PrecompileJobAction>(Input, OutputTy);
2769 }
2770 case phases::Compile: {
2771 if (Args.hasArg(options::OPT_fsyntax_only))
2772 return C.MakeAction<CompileJobAction>(Input, types::TY_Nothing);
2773 if (Args.hasArg(options::OPT_rewrite_objc))
2774 return C.MakeAction<CompileJobAction>(Input, types::TY_RewrittenObjC);
2775 if (Args.hasArg(options::OPT_rewrite_legacy_objc))
2776 return C.MakeAction<CompileJobAction>(Input,
2777 types::TY_RewrittenLegacyObjC);
2778 if (Args.hasArg(options::OPT__analyze, options::OPT__analyze_auto))
2779 return C.MakeAction<AnalyzeJobAction>(Input, types::TY_Plist);
2780 if (Args.hasArg(options::OPT__migrate))
2781 return C.MakeAction<MigrateJobAction>(Input, types::TY_Remap);
2782 if (Args.hasArg(options::OPT_emit_ast))
2783 return C.MakeAction<CompileJobAction>(Input, types::TY_AST);
2784 if (Args.hasArg(options::OPT_module_file_info))
2785 return C.MakeAction<CompileJobAction>(Input, types::TY_ModuleFile);
2786 if (Args.hasArg(options::OPT_verify_pch))
2787 return C.MakeAction<VerifyPCHJobAction>(Input, types::TY_Nothing);
2788 return C.MakeAction<CompileJobAction>(Input, types::TY_LLVM_BC);
2789 }
2790 case phases::Backend: {
2791 if (isUsingLTO()) {
2792 types::ID Output =
2793 Args.hasArg(options::OPT_S) ? types::TY_LTO_IR : types::TY_LTO_BC;
2794 return C.MakeAction<BackendJobAction>(Input, Output);
2795 }
2796 if (Args.hasArg(options::OPT_emit_llvm)) {
2797 types::ID Output =
2798 Args.hasArg(options::OPT_S) ? types::TY_LLVM_IR : types::TY_LLVM_BC;
2799 return C.MakeAction<BackendJobAction>(Input, Output);
2800 }
2801 return C.MakeAction<BackendJobAction>(Input, types::TY_PP_Asm);
2802 }
2803 case phases::Assemble:
2804 return C.MakeAction<AssembleJobAction>(std::move(Input), types::TY_Object);
2805 }
2806
2807 llvm_unreachable("invalid phase in ConstructPhaseAction")::llvm::llvm_unreachable_internal("invalid phase in ConstructPhaseAction"
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 2807)
;
2808}
2809
2810void Driver::BuildJobs(Compilation &C) const {
2811 llvm::PrettyStackTraceString CrashInfo("Building compilation jobs");
2812
2813 Arg *FinalOutput = C.getArgs().getLastArg(options::OPT_o);
2814
2815 // It is an error to provide a -o option if we are making multiple output
2816 // files.
2817 if (FinalOutput) {
2818 unsigned NumOutputs = 0;
2819 for (const Action *A : C.getActions())
2820 if (A->getType() != types::TY_Nothing)
2821 ++NumOutputs;
2822
2823 if (NumOutputs > 1) {
2824 Diag(clang::diag::err_drv_output_argument_with_multiple_files);
2825 FinalOutput = nullptr;
2826 }
2827 }
2828
2829 // Collect the list of architectures.
2830 llvm::StringSet<> ArchNames;
2831 if (C.getDefaultToolChain().getTriple().isOSBinFormatMachO())
2832 for (const Arg *A : C.getArgs())
2833 if (A->getOption().matches(options::OPT_arch))
2834 ArchNames.insert(A->getValue());
2835
2836 // Set of (Action, canonical ToolChain triple) pairs we've built jobs for.
2837 std::map<std::pair<const Action *, std::string>, InputInfo> CachedResults;
2838 for (Action *A : C.getActions()) {
2839 // If we are linking an image for multiple archs then the linker wants
2840 // -arch_multiple and -final_output <final image name>. Unfortunately, this
2841 // doesn't fit in cleanly because we have to pass this information down.
2842 //
2843 // FIXME: This is a hack; find a cleaner way to integrate this into the
2844 // process.
2845 const char *LinkingOutput = nullptr;
2846 if (isa<LipoJobAction>(A)) {
2847 if (FinalOutput)
2848 LinkingOutput = FinalOutput->getValue();
2849 else
2850 LinkingOutput = getDefaultImageName();
2851 }
2852
2853 BuildJobsForAction(C, A, &C.getDefaultToolChain(),
2854 /*BoundArch*/ StringRef(),
2855 /*AtTopLevel*/ true,
2856 /*MultipleArchs*/ ArchNames.size() > 1,
2857 /*LinkingOutput*/ LinkingOutput, CachedResults,
2858 /*TargetDeviceOffloadKind*/ Action::OFK_None);
2859 }
2860
2861 // If the user passed -Qunused-arguments or there were errors, don't warn
2862 // about any unused arguments.
2863 if (Diags.hasErrorOccurred() ||
2864 C.getArgs().hasArg(options::OPT_Qunused_arguments))
2865 return;
2866
2867 // Claim -### here.
2868 (void)C.getArgs().hasArg(options::OPT__HASH_HASH_HASH);
2869
2870 // Claim --driver-mode, --rsp-quoting, it was handled earlier.
2871 (void)C.getArgs().hasArg(options::OPT_driver_mode);
2872 (void)C.getArgs().hasArg(options::OPT_rsp_quoting);
2873
2874 for (Arg *A : C.getArgs()) {
2875 // FIXME: It would be nice to be able to send the argument to the
2876 // DiagnosticsEngine, so that extra values, position, and so on could be
2877 // printed.
2878 if (!A->isClaimed()) {
2879 if (A->getOption().hasFlag(options::NoArgumentUnused))
2880 continue;
2881
2882 // Suppress the warning automatically if this is just a flag, and it is an
2883 // instance of an argument we already claimed.
2884 const Option &Opt = A->getOption();
2885 if (Opt.getKind() == Option::FlagClass) {
2886 bool DuplicateClaimed = false;
2887
2888 for (const Arg *AA : C.getArgs().filtered(&Opt)) {
2889 if (AA->isClaimed()) {
2890 DuplicateClaimed = true;
2891 break;
2892 }
2893 }
2894
2895 if (DuplicateClaimed)
2896 continue;
2897 }
2898
2899 // In clang-cl, don't mention unknown arguments here since they have
2900 // already been warned about.
2901 if (!IsCLMode() || !A->getOption().matches(options::OPT_UNKNOWN))
2902 Diag(clang::diag::warn_drv_unused_argument)
2903 << A->getAsString(C.getArgs());
2904 }
2905 }
2906}
2907
2908namespace {
2909/// Utility class to control the collapse of dependent actions and select the
2910/// tools accordingly.
2911class ToolSelector final {
2912 /// The tool chain this selector refers to.
2913 const ToolChain &TC;
2914
2915 /// The compilation this selector refers to.
2916 const Compilation &C;
2917
2918 /// The base action this selector refers to.
2919 const JobAction *BaseAction;
2920
2921 /// Set to true if the current toolchain refers to host actions.
2922 bool IsHostSelector;
2923
2924 /// Set to true if save-temps and embed-bitcode functionalities are active.
2925 bool SaveTemps;
2926 bool EmbedBitcode;
2927
2928 /// Get previous dependent action or null if that does not exist. If
2929 /// \a CanBeCollapsed is false, that action must be legal to collapse or
2930 /// null will be returned.
2931 const JobAction *getPrevDependentAction(const ActionList &Inputs,
2932 ActionList &SavedOffloadAction,
2933 bool CanBeCollapsed = true) {
2934 // An option can be collapsed only if it has a single input.
2935 if (Inputs.size() != 1)
2936 return nullptr;
2937
2938 Action *CurAction = *Inputs.begin();
2939 if (CanBeCollapsed &&
2940 !CurAction->isCollapsingWithNextDependentActionLegal())
2941 return nullptr;
2942
2943 // If the input action is an offload action. Look through it and save any
2944 // offload action that can be dropped in the event of a collapse.
2945 if (auto *OA = dyn_cast<OffloadAction>(CurAction)) {
2946 // If the dependent action is a device action, we will attempt to collapse
2947 // only with other device actions. Otherwise, we would do the same but
2948 // with host actions only.
2949 if (!IsHostSelector) {
2950 if (OA->hasSingleDeviceDependence(/*DoNotConsiderHostActions=*/true)) {
2951 CurAction =
2952 OA->getSingleDeviceDependence(/*DoNotConsiderHostActions=*/true);
2953 if (CanBeCollapsed &&
2954 !CurAction->isCollapsingWithNextDependentActionLegal())
2955 return nullptr;
2956 SavedOffloadAction.push_back(OA);
2957 return dyn_cast<JobAction>(CurAction);
2958 }
2959 } else if (OA->hasHostDependence()) {
2960 CurAction = OA->getHostDependence();
2961 if (CanBeCollapsed &&
2962 !CurAction->isCollapsingWithNextDependentActionLegal())
2963 return nullptr;
2964 SavedOffloadAction.push_back(OA);
2965 return dyn_cast<JobAction>(CurAction);
2966 }
2967 return nullptr;
2968 }
2969
2970 return dyn_cast<JobAction>(CurAction);
2971 }
2972
2973 /// Return true if an assemble action can be collapsed.
2974 bool canCollapseAssembleAction() const {
2975 return TC.useIntegratedAs() && !SaveTemps &&
2976 !C.getArgs().hasArg(options::OPT_via_file_asm) &&
2977 !C.getArgs().hasArg(options::OPT__SLASH_FA) &&
2978 !C.getArgs().hasArg(options::OPT__SLASH_Fa);
2979 }
2980
2981 /// Return true if a preprocessor action can be collapsed.
2982 bool canCollapsePreprocessorAction() const {
2983 return !C.getArgs().hasArg(options::OPT_no_integrated_cpp) &&
2984 !C.getArgs().hasArg(options::OPT_traditional_cpp) && !SaveTemps &&
2985 !C.getArgs().hasArg(options::OPT_rewrite_objc);
2986 }
2987
2988 /// Struct that relates an action with the offload actions that would be
2989 /// collapsed with it.
2990 struct JobActionInfo final {
2991 /// The action this info refers to.
2992 const JobAction *JA = nullptr;
2993 /// The offload actions we need to take care off if this action is
2994 /// collapsed.
2995 ActionList SavedOffloadAction;
2996 };
2997
2998 /// Append collapsed offload actions from the give nnumber of elements in the
2999 /// action info array.
3000 static void AppendCollapsedOffloadAction(ActionList &CollapsedOffloadAction,
3001 ArrayRef<JobActionInfo> &ActionInfo,
3002 unsigned ElementNum) {
3003 assert(ElementNum <= ActionInfo.size() && "Invalid number of elements.")(static_cast <bool> (ElementNum <= ActionInfo.size()
&& "Invalid number of elements.") ? void (0) : __assert_fail
("ElementNum <= ActionInfo.size() && \"Invalid number of elements.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 3003, __extension__ __PRETTY_FUNCTION__))
;
3004 for (unsigned I = 0; I < ElementNum; ++I)
3005 CollapsedOffloadAction.append(ActionInfo[I].SavedOffloadAction.begin(),
3006 ActionInfo[I].SavedOffloadAction.end());
3007 }
3008
3009 /// Functions that attempt to perform the combining. They detect if that is
3010 /// legal, and if so they update the inputs \a Inputs and the offload action
3011 /// that were collapsed in \a CollapsedOffloadAction. A tool that deals with
3012 /// the combined action is returned. If the combining is not legal or if the
3013 /// tool does not exist, null is returned.
3014 /// Currently three kinds of collapsing are supported:
3015 /// - Assemble + Backend + Compile;
3016 /// - Assemble + Backend ;
3017 /// - Backend + Compile.
3018 const Tool *
3019 combineAssembleBackendCompile(ArrayRef<JobActionInfo> ActionInfo,
3020 const ActionList *&Inputs,
3021 ActionList &CollapsedOffloadAction) {
3022 if (ActionInfo.size() < 3 || !canCollapseAssembleAction())
3023 return nullptr;
3024 auto *AJ = dyn_cast<AssembleJobAction>(ActionInfo[0].JA);
3025 auto *BJ = dyn_cast<BackendJobAction>(ActionInfo[1].JA);
3026 auto *CJ = dyn_cast<CompileJobAction>(ActionInfo[2].JA);
3027 if (!AJ || !BJ || !CJ)
3028 return nullptr;
3029
3030 // Get compiler tool.
3031 const Tool *T = TC.SelectTool(*CJ);
3032 if (!T)
3033 return nullptr;
3034
3035 // When using -fembed-bitcode, it is required to have the same tool (clang)
3036 // for both CompilerJA and BackendJA. Otherwise, combine two stages.
3037 if (EmbedBitcode) {
3038 const Tool *BT = TC.SelectTool(*BJ);
3039 if (BT == T)
3040 return nullptr;
3041 }
3042
3043 if (!T->hasIntegratedAssembler())
3044 return nullptr;
3045
3046 Inputs = &CJ->getInputs();
3047 AppendCollapsedOffloadAction(CollapsedOffloadAction, ActionInfo,
3048 /*NumElements=*/3);
3049 return T;
3050 }
3051 const Tool *combineAssembleBackend(ArrayRef<JobActionInfo> ActionInfo,
3052 const ActionList *&Inputs,
3053 ActionList &CollapsedOffloadAction) {
3054 if (ActionInfo.size() < 2 || !canCollapseAssembleAction())
3055 return nullptr;
3056 auto *AJ = dyn_cast<AssembleJobAction>(ActionInfo[0].JA);
3057 auto *BJ = dyn_cast<BackendJobAction>(ActionInfo[1].JA);
3058 if (!AJ || !BJ)
3059 return nullptr;
3060
3061 // Retrieve the compile job, backend action must always be preceded by one.
3062 ActionList CompileJobOffloadActions;
3063 auto *CJ = getPrevDependentAction(BJ->getInputs(), CompileJobOffloadActions,
3064 /*CanBeCollapsed=*/false);
3065 if (!AJ || !BJ || !CJ)
3066 return nullptr;
3067
3068 assert(isa<CompileJobAction>(CJ) &&(static_cast <bool> (isa<CompileJobAction>(CJ) &&
"Expecting compile job preceding backend job.") ? void (0) :
__assert_fail ("isa<CompileJobAction>(CJ) && \"Expecting compile job preceding backend job.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 3069, __extension__ __PRETTY_FUNCTION__))
3069 "Expecting compile job preceding backend job.")(static_cast <bool> (isa<CompileJobAction>(CJ) &&
"Expecting compile job preceding backend job.") ? void (0) :
__assert_fail ("isa<CompileJobAction>(CJ) && \"Expecting compile job preceding backend job.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 3069, __extension__ __PRETTY_FUNCTION__))
;
3070
3071 // Get compiler tool.
3072 const Tool *T = TC.SelectTool(*CJ);
3073 if (!T)
3074 return nullptr;
3075
3076 if (!T->hasIntegratedAssembler())
3077 return nullptr;
3078
3079 Inputs = &BJ->getInputs();
3080 AppendCollapsedOffloadAction(CollapsedOffloadAction, ActionInfo,
3081 /*NumElements=*/2);
3082 return T;
3083 }
3084 const Tool *combineBackendCompile(ArrayRef<JobActionInfo> ActionInfo,
3085 const ActionList *&Inputs,
3086 ActionList &CollapsedOffloadAction) {
3087 if (ActionInfo.size() < 2 || !canCollapsePreprocessorAction())
3088 return nullptr;
3089 auto *BJ = dyn_cast<BackendJobAction>(ActionInfo[0].JA);
3090 auto *CJ = dyn_cast<CompileJobAction>(ActionInfo[1].JA);
3091 if (!BJ || !CJ)
3092 return nullptr;
3093
3094 // Get compiler tool.
3095 const Tool *T = TC.SelectTool(*CJ);
3096 if (!T)
3097 return nullptr;
3098
3099 if (T->canEmitIR() && (SaveTemps || EmbedBitcode))
3100 return nullptr;
3101
3102 Inputs = &CJ->getInputs();
3103 AppendCollapsedOffloadAction(CollapsedOffloadAction, ActionInfo,
3104 /*NumElements=*/2);
3105 return T;
3106 }
3107
3108 /// Updates the inputs if the obtained tool supports combining with
3109 /// preprocessor action, and the current input is indeed a preprocessor
3110 /// action. If combining results in the collapse of offloading actions, those
3111 /// are appended to \a CollapsedOffloadAction.
3112 void combineWithPreprocessor(const Tool *T, const ActionList *&Inputs,
3113 ActionList &CollapsedOffloadAction) {
3114 if (!T || !canCollapsePreprocessorAction() || !T->hasIntegratedCPP())
3115 return;
3116
3117 // Attempt to get a preprocessor action dependence.
3118 ActionList PreprocessJobOffloadActions;
3119 auto *PJ = getPrevDependentAction(*Inputs, PreprocessJobOffloadActions);
3120 if (!PJ || !isa<PreprocessJobAction>(PJ))
3121 return;
3122
3123 // This is legal to combine. Append any offload action we found and set the
3124 // current inputs to preprocessor inputs.
3125 CollapsedOffloadAction.append(PreprocessJobOffloadActions.begin(),
3126 PreprocessJobOffloadActions.end());
3127 Inputs = &PJ->getInputs();
3128 }
3129
3130public:
3131 ToolSelector(const JobAction *BaseAction, const ToolChain &TC,
3132 const Compilation &C, bool SaveTemps, bool EmbedBitcode)
3133 : TC(TC), C(C), BaseAction(BaseAction), SaveTemps(SaveTemps),
3134 EmbedBitcode(EmbedBitcode) {
3135 assert(BaseAction && "Invalid base action.")(static_cast <bool> (BaseAction && "Invalid base action."
) ? void (0) : __assert_fail ("BaseAction && \"Invalid base action.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 3135, __extension__ __PRETTY_FUNCTION__))
;
3136 IsHostSelector = BaseAction->getOffloadingDeviceKind() == Action::OFK_None;
3137 }
3138
3139 /// Check if a chain of actions can be combined and return the tool that can
3140 /// handle the combination of actions. The pointer to the current inputs \a
3141 /// Inputs and the list of offload actions \a CollapsedOffloadActions
3142 /// connected to collapsed actions are updated accordingly. The latter enables
3143 /// the caller of the selector to process them afterwards instead of just
3144 /// dropping them. If no suitable tool is found, null will be returned.
3145 const Tool *getTool(const ActionList *&Inputs,
3146 ActionList &CollapsedOffloadAction) {
3147 //
3148 // Get the largest chain of actions that we could combine.
3149 //
3150
3151 SmallVector<JobActionInfo, 5> ActionChain(1);
3152 ActionChain.back().JA = BaseAction;
3153 while (ActionChain.back().JA) {
3154 const Action *CurAction = ActionChain.back().JA;
3155
3156 // Grow the chain by one element.
3157 ActionChain.resize(ActionChain.size() + 1);
3158 JobActionInfo &AI = ActionChain.back();
3159
3160 // Attempt to fill it with the
3161 AI.JA =
3162 getPrevDependentAction(CurAction->getInputs(), AI.SavedOffloadAction);
3163 }
3164
3165 // Pop the last action info as it could not be filled.
3166 ActionChain.pop_back();
3167
3168 //
3169 // Attempt to combine actions. If all combining attempts failed, just return
3170 // the tool of the provided action. At the end we attempt to combine the
3171 // action with any preprocessor action it may depend on.
3172 //
3173
3174 const Tool *T = combineAssembleBackendCompile(ActionChain, Inputs,
3175 CollapsedOffloadAction);
3176 if (!T)
3177 T = combineAssembleBackend(ActionChain, Inputs, CollapsedOffloadAction);
3178 if (!T)
3179 T = combineBackendCompile(ActionChain, Inputs, CollapsedOffloadAction);
3180 if (!T) {
3181 Inputs = &BaseAction->getInputs();
3182 T = TC.SelectTool(*BaseAction);
3183 }
3184
3185 combineWithPreprocessor(T, Inputs, CollapsedOffloadAction);
3186 return T;
3187 }
3188};
3189}
3190
3191/// Return a string that uniquely identifies the result of a job. The bound arch
3192/// is not necessarily represented in the toolchain's triple -- for example,
3193/// armv7 and armv7s both map to the same triple -- so we need both in our map.
3194/// Also, we need to add the offloading device kind, as the same tool chain can
3195/// be used for host and device for some programming models, e.g. OpenMP.
3196static std::string GetTriplePlusArchString(const ToolChain *TC,
3197 StringRef BoundArch,
3198 Action::OffloadKind OffloadKind) {
3199 std::string TriplePlusArch = TC->getTriple().normalize();
3200 if (!BoundArch.empty()) {
3201 TriplePlusArch += "-";
3202 TriplePlusArch += BoundArch;
3203 }
3204 TriplePlusArch += "-";
3205 TriplePlusArch += Action::GetOffloadKindName(OffloadKind);
3206 return TriplePlusArch;
3207}
3208
3209InputInfo Driver::BuildJobsForAction(
3210 Compilation &C, const Action *A, const ToolChain *TC, StringRef BoundArch,
3211 bool AtTopLevel, bool MultipleArchs, const char *LinkingOutput,
3212 std::map<std::pair<const Action *, std::string>, InputInfo> &CachedResults,
3213 Action::OffloadKind TargetDeviceOffloadKind) const {
3214 std::pair<const Action *, std::string> ActionTC = {
3215 A, GetTriplePlusArchString(TC, BoundArch, TargetDeviceOffloadKind)};
3216 auto CachedResult = CachedResults.find(ActionTC);
3217 if (CachedResult != CachedResults.end()) {
3218 return CachedResult->second;
3219 }
3220 InputInfo Result = BuildJobsForActionNoCache(
3221 C, A, TC, BoundArch, AtTopLevel, MultipleArchs, LinkingOutput,
3222 CachedResults, TargetDeviceOffloadKind);
3223 CachedResults[ActionTC] = Result;
3224 return Result;
3225}
3226
3227InputInfo Driver::BuildJobsForActionNoCache(
3228 Compilation &C, const Action *A, const ToolChain *TC, StringRef BoundArch,
3229 bool AtTopLevel, bool MultipleArchs, const char *LinkingOutput,
3230 std::map<std::pair<const Action *, std::string>, InputInfo> &CachedResults,
3231 Action::OffloadKind TargetDeviceOffloadKind) const {
3232 llvm::PrettyStackTraceString CrashInfo("Building compilation jobs");
3233
3234 InputInfoList OffloadDependencesInputInfo;
3235 bool BuildingForOffloadDevice = TargetDeviceOffloadKind != Action::OFK_None;
3236 if (const OffloadAction *OA = dyn_cast<OffloadAction>(A)) {
3237 // The 'Darwin' toolchain is initialized only when its arguments are
3238 // computed. Get the default arguments for OFK_None to ensure that
3239 // initialization is performed before processing the offload action.
3240 // FIXME: Remove when darwin's toolchain is initialized during construction.
3241 C.getArgsForToolChain(TC, BoundArch, Action::OFK_None);
3242
3243 // The offload action is expected to be used in four different situations.
3244 //
3245 // a) Set a toolchain/architecture/kind for a host action:
3246 // Host Action 1 -> OffloadAction -> Host Action 2
3247 //
3248 // b) Set a toolchain/architecture/kind for a device action;
3249 // Device Action 1 -> OffloadAction -> Device Action 2
3250 //
3251 // c) Specify a device dependence to a host action;
3252 // Device Action 1 _
3253 // \
3254 // Host Action 1 ---> OffloadAction -> Host Action 2
3255 //
3256 // d) Specify a host dependence to a device action.
3257 // Host Action 1 _
3258 // \
3259 // Device Action 1 ---> OffloadAction -> Device Action 2
3260 //
3261 // For a) and b), we just return the job generated for the dependence. For
3262 // c) and d) we override the current action with the host/device dependence
3263 // if the current toolchain is host/device and set the offload dependences
3264 // info with the jobs obtained from the device/host dependence(s).
3265
3266 // If there is a single device option, just generate the job for it.
3267 if (OA->hasSingleDeviceDependence()) {
3268 InputInfo DevA;
3269 OA->doOnEachDeviceDependence([&](Action *DepA, const ToolChain *DepTC,
3270 const char *DepBoundArch) {
3271 DevA =
3272 BuildJobsForAction(C, DepA, DepTC, DepBoundArch, AtTopLevel,
3273 /*MultipleArchs*/ !!DepBoundArch, LinkingOutput,
3274 CachedResults, DepA->getOffloadingDeviceKind());
3275 });
3276 return DevA;
3277 }
3278
3279 // If 'Action 2' is host, we generate jobs for the device dependences and
3280 // override the current action with the host dependence. Otherwise, we
3281 // generate the host dependences and override the action with the device
3282 // dependence. The dependences can't therefore be a top-level action.
3283 OA->doOnEachDependence(
3284 /*IsHostDependence=*/BuildingForOffloadDevice,
3285 [&](Action *DepA, const ToolChain *DepTC, const char *DepBoundArch) {
3286 OffloadDependencesInputInfo.push_back(BuildJobsForAction(
3287 C, DepA, DepTC, DepBoundArch, /*AtTopLevel=*/false,
3288 /*MultipleArchs*/ !!DepBoundArch, LinkingOutput, CachedResults,
3289 DepA->getOffloadingDeviceKind()));
3290 });
3291
3292 A = BuildingForOffloadDevice
3293 ? OA->getSingleDeviceDependence(/*DoNotConsiderHostActions=*/true)
3294 : OA->getHostDependence();
3295 }
3296
3297 if (const InputAction *IA = dyn_cast<InputAction>(A)) {
3298 // FIXME: It would be nice to not claim this here; maybe the old scheme of
3299 // just using Args was better?
3300 const Arg &Input = IA->getInputArg();
3301 Input.claim();
3302 if (Input.getOption().matches(options::OPT_INPUT)) {
3303 const char *Name = Input.getValue();
3304 return InputInfo(A, Name, /* BaseInput = */ Name);
3305 }
3306 return InputInfo(A, &Input, /* BaseInput = */ "");
3307 }
3308
3309 if (const BindArchAction *BAA = dyn_cast<BindArchAction>(A)) {
3310 const ToolChain *TC;
3311 StringRef ArchName = BAA->getArchName();
3312
3313 if (!ArchName.empty())
3314 TC = &getToolChain(C.getArgs(),
3315 computeTargetTriple(*this, DefaultTargetTriple,
3316 C.getArgs(), ArchName));
3317 else
3318 TC = &C.getDefaultToolChain();
3319
3320 return BuildJobsForAction(C, *BAA->input_begin(), TC, ArchName, AtTopLevel,
3321 MultipleArchs, LinkingOutput, CachedResults,
3322 TargetDeviceOffloadKind);
3323 }
3324
3325
3326 const ActionList *Inputs = &A->getInputs();
3327
3328 const JobAction *JA = cast<JobAction>(A);
3329 ActionList CollapsedOffloadActions;
3330
3331 ToolSelector TS(JA, *TC, C, isSaveTempsEnabled(),
3332 embedBitcodeInObject() && !isUsingLTO());
3333 const Tool *T = TS.getTool(Inputs, CollapsedOffloadActions);
3334
3335 if (!T)
3336 return InputInfo();
3337
3338 // If we've collapsed action list that contained OffloadAction we
3339 // need to build jobs for host/device-side inputs it may have held.
3340 for (const auto *OA : CollapsedOffloadActions)
3341 cast<OffloadAction>(OA)->doOnEachDependence(
3342 /*IsHostDependence=*/BuildingForOffloadDevice,
3343 [&](Action *DepA, const ToolChain *DepTC, const char *DepBoundArch) {
3344 OffloadDependencesInputInfo.push_back(BuildJobsForAction(
3345 C, DepA, DepTC, DepBoundArch, /* AtTopLevel */ false,
3346 /*MultipleArchs=*/!!DepBoundArch, LinkingOutput, CachedResults,
3347 DepA->getOffloadingDeviceKind()));
3348 });
3349
3350 // Only use pipes when there is exactly one input.
3351 InputInfoList InputInfos;
3352 for (const Action *Input : *Inputs) {
3353 // Treat dsymutil and verify sub-jobs as being at the top-level too, they
3354 // shouldn't get temporary output names.
3355 // FIXME: Clean this up.
3356 bool SubJobAtTopLevel =
3357 AtTopLevel && (isa<DsymutilJobAction>(A) || isa<VerifyJobAction>(A));
3358 InputInfos.push_back(BuildJobsForAction(
3359 C, Input, TC, BoundArch, SubJobAtTopLevel, MultipleArchs, LinkingOutput,
3360 CachedResults, A->getOffloadingDeviceKind()));
3361 }
3362
3363 // Always use the first input as the base input.
3364 const char *BaseInput = InputInfos[0].getBaseInput();
3365
3366 // ... except dsymutil actions, which use their actual input as the base
3367 // input.
3368 if (JA->getType() == types::TY_dSYM)
3369 BaseInput = InputInfos[0].getFilename();
3370
3371 // Append outputs of offload device jobs to the input list
3372 if (!OffloadDependencesInputInfo.empty())
3373 InputInfos.append(OffloadDependencesInputInfo.begin(),
3374 OffloadDependencesInputInfo.end());
3375
3376 // Set the effective triple of the toolchain for the duration of this job.
3377 llvm::Triple EffectiveTriple;
3378 const ToolChain &ToolTC = T->getToolChain();
3379 const ArgList &Args =
3380 C.getArgsForToolChain(TC, BoundArch, A->getOffloadingDeviceKind());
3381 if (InputInfos.size() != 1) {
3382 EffectiveTriple = llvm::Triple(ToolTC.ComputeEffectiveClangTriple(Args));
3383 } else {
3384 // Pass along the input type if it can be unambiguously determined.
3385 EffectiveTriple = llvm::Triple(
3386 ToolTC.ComputeEffectiveClangTriple(Args, InputInfos[0].getType()));
3387 }
3388 RegisterEffectiveTriple TripleRAII(ToolTC, EffectiveTriple);
3389
3390 // Determine the place to write output to, if any.
3391 InputInfo Result;
3392 InputInfoList UnbundlingResults;
3393 if (auto *UA = dyn_cast<OffloadUnbundlingJobAction>(JA)) {
3394 // If we have an unbundling job, we need to create results for all the
3395 // outputs. We also update the results cache so that other actions using
3396 // this unbundling action can get the right results.
3397 for (auto &UI : UA->getDependentActionsInfo()) {
3398 assert(UI.DependentOffloadKind != Action::OFK_None &&(static_cast <bool> (UI.DependentOffloadKind != Action::
OFK_None && "Unbundling with no offloading??") ? void
(0) : __assert_fail ("UI.DependentOffloadKind != Action::OFK_None && \"Unbundling with no offloading??\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 3399, __extension__ __PRETTY_FUNCTION__))
3399 "Unbundling with no offloading??")(static_cast <bool> (UI.DependentOffloadKind != Action::
OFK_None && "Unbundling with no offloading??") ? void
(0) : __assert_fail ("UI.DependentOffloadKind != Action::OFK_None && \"Unbundling with no offloading??\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 3399, __extension__ __PRETTY_FUNCTION__))
;
3400
3401 // Unbundling actions are never at the top level. When we generate the
3402 // offloading prefix, we also do that for the host file because the
3403 // unbundling action does not change the type of the output which can
3404 // cause a overwrite.
3405 std::string OffloadingPrefix = Action::GetOffloadingFileNamePrefix(
3406 UI.DependentOffloadKind,
3407 UI.DependentToolChain->getTriple().normalize(),
3408 /*CreatePrefixForHost=*/true);
3409 auto CurI = InputInfo(
3410 UA, GetNamedOutputPath(C, *UA, BaseInput, UI.DependentBoundArch,
3411 /*AtTopLevel=*/false, MultipleArchs,
3412 OffloadingPrefix),
3413 BaseInput);
3414 // Save the unbundling result.
3415 UnbundlingResults.push_back(CurI);
3416
3417 // Get the unique string identifier for this dependence and cache the
3418 // result.
3419 CachedResults[{A, GetTriplePlusArchString(
3420 UI.DependentToolChain, BoundArch,
3421 UI.DependentOffloadKind)}] = CurI;
3422 }
3423
3424 // Now that we have all the results generated, select the one that should be
3425 // returned for the current depending action.
3426 std::pair<const Action *, std::string> ActionTC = {
3427 A, GetTriplePlusArchString(TC, BoundArch, TargetDeviceOffloadKind)};
3428 assert(CachedResults.find(ActionTC) != CachedResults.end() &&(static_cast <bool> (CachedResults.find(ActionTC) != CachedResults
.end() && "Result does not exist??") ? void (0) : __assert_fail
("CachedResults.find(ActionTC) != CachedResults.end() && \"Result does not exist??\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 3429, __extension__ __PRETTY_FUNCTION__))
3429 "Result does not exist??")(static_cast <bool> (CachedResults.find(ActionTC) != CachedResults
.end() && "Result does not exist??") ? void (0) : __assert_fail
("CachedResults.find(ActionTC) != CachedResults.end() && \"Result does not exist??\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 3429, __extension__ __PRETTY_FUNCTION__))
;
3430 Result = CachedResults[ActionTC];
3431 } else if (JA->getType() == types::TY_Nothing)
3432 Result = InputInfo(A, BaseInput);
3433 else {
3434 // We only have to generate a prefix for the host if this is not a top-level
3435 // action.
3436 std::string OffloadingPrefix = Action::GetOffloadingFileNamePrefix(
3437 A->getOffloadingDeviceKind(), TC->getTriple().normalize(),
3438 /*CreatePrefixForHost=*/!!A->getOffloadingHostActiveKinds() &&
3439 !AtTopLevel);
3440 Result = InputInfo(A, GetNamedOutputPath(C, *JA, BaseInput, BoundArch,
3441 AtTopLevel, MultipleArchs,
3442 OffloadingPrefix),
3443 BaseInput);
3444 }
3445
3446 if (CCCPrintBindings && !CCGenDiagnostics) {
3447 llvm::errs() << "# \"" << T->getToolChain().getTripleString() << '"'
3448 << " - \"" << T->getName() << "\", inputs: [";
3449 for (unsigned i = 0, e = InputInfos.size(); i != e; ++i) {
3450 llvm::errs() << InputInfos[i].getAsString();
3451 if (i + 1 != e)
3452 llvm::errs() << ", ";
3453 }
3454 if (UnbundlingResults.empty())
3455 llvm::errs() << "], output: " << Result.getAsString() << "\n";
3456 else {
3457 llvm::errs() << "], outputs: [";
3458 for (unsigned i = 0, e = UnbundlingResults.size(); i != e; ++i) {
3459 llvm::errs() << UnbundlingResults[i].getAsString();
3460 if (i + 1 != e)
3461 llvm::errs() << ", ";
3462 }
3463 llvm::errs() << "] \n";
3464 }
3465 } else {
3466 if (UnbundlingResults.empty())
3467 T->ConstructJob(
3468 C, *JA, Result, InputInfos,
3469 C.getArgsForToolChain(TC, BoundArch, JA->getOffloadingDeviceKind()),
3470 LinkingOutput);
3471 else
3472 T->ConstructJobMultipleOutputs(
3473 C, *JA, UnbundlingResults, InputInfos,
3474 C.getArgsForToolChain(TC, BoundArch, JA->getOffloadingDeviceKind()),
3475 LinkingOutput);
3476 }
3477 return Result;
3478}
3479
3480const char *Driver::getDefaultImageName() const {
3481 llvm::Triple Target(llvm::Triple::normalize(DefaultTargetTriple));
3482 return Target.isOSWindows() ? "a.exe" : "a.out";
3483}
3484
3485/// \brief Create output filename based on ArgValue, which could either be a
3486/// full filename, filename without extension, or a directory. If ArgValue
3487/// does not provide a filename, then use BaseName, and use the extension
3488/// suitable for FileType.
3489static const char *MakeCLOutputFilename(const ArgList &Args, StringRef ArgValue,
3490 StringRef BaseName,
3491 types::ID FileType) {
3492 SmallString<128> Filename = ArgValue;
3493
3494 if (ArgValue.empty()) {
3495 // If the argument is empty, output to BaseName in the current dir.
3496 Filename = BaseName;
3497 } else if (llvm::sys::path::is_separator(Filename.back())) {
3498 // If the argument is a directory, output to BaseName in that dir.
3499 llvm::sys::path::append(Filename, BaseName);
3500 }
3501
3502 if (!llvm::sys::path::has_extension(ArgValue)) {
3503 // If the argument didn't provide an extension, then set it.
3504 const char *Extension = types::getTypeTempSuffix(FileType, true);
3505
3506 if (FileType == types::TY_Image &&
3507 Args.hasArg(options::OPT__SLASH_LD, options::OPT__SLASH_LDd)) {
3508 // The output file is a dll.
3509 Extension = "dll";
3510 }
3511
3512 llvm::sys::path::replace_extension(Filename, Extension);
3513 }
3514
3515 return Args.MakeArgString(Filename.c_str());
3516}
3517
3518const char *Driver::GetNamedOutputPath(Compilation &C, const JobAction &JA,
3519 const char *BaseInput,
3520 StringRef BoundArch, bool AtTopLevel,
3521 bool MultipleArchs,
3522 StringRef OffloadingPrefix) const {
3523 llvm::PrettyStackTraceString CrashInfo("Computing output path");
3524 // Output to a user requested destination?
3525 if (AtTopLevel && !isa<DsymutilJobAction>(JA) && !isa<VerifyJobAction>(JA)) {
3526 if (Arg *FinalOutput = C.getArgs().getLastArg(options::OPT_o))
3527 return C.addResultFile(FinalOutput->getValue(), &JA);
3528 }
3529
3530 // For /P, preprocess to file named after BaseInput.
3531 if (C.getArgs().hasArg(options::OPT__SLASH_P)) {
3532 assert(AtTopLevel && isa<PreprocessJobAction>(JA))(static_cast <bool> (AtTopLevel && isa<PreprocessJobAction
>(JA)) ? void (0) : __assert_fail ("AtTopLevel && isa<PreprocessJobAction>(JA)"
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 3532, __extension__ __PRETTY_FUNCTION__))
;
3533 StringRef BaseName = llvm::sys::path::filename(BaseInput);
3534 StringRef NameArg;
3535 if (Arg *A = C.getArgs().getLastArg(options::OPT__SLASH_Fi))
3536 NameArg = A->getValue();
3537 return C.addResultFile(
3538 MakeCLOutputFilename(C.getArgs(), NameArg, BaseName, types::TY_PP_C),
3539 &JA);
3540 }
3541
3542 // Default to writing to stdout?
3543 if (AtTopLevel && !CCGenDiagnostics &&
3544 (isa<PreprocessJobAction>(JA) || JA.getType() == types::TY_ModuleFile))
3545 return "-";
3546
3547 // Is this the assembly listing for /FA?
3548 if (JA.getType() == types::TY_PP_Asm &&
3549 (C.getArgs().hasArg(options::OPT__SLASH_FA) ||
3550 C.getArgs().hasArg(options::OPT__SLASH_Fa))) {
3551 // Use /Fa and the input filename to determine the asm file name.
3552 StringRef BaseName = llvm::sys::path::filename(BaseInput);
3553 StringRef FaValue = C.getArgs().getLastArgValue(options::OPT__SLASH_Fa);
3554 return C.addResultFile(
3555 MakeCLOutputFilename(C.getArgs(), FaValue, BaseName, JA.getType()),
3556 &JA);
3557 }
3558
3559 // Output to a temporary file?
3560 if ((!AtTopLevel && !isSaveTempsEnabled() &&
3561 !C.getArgs().hasArg(options::OPT__SLASH_Fo)) ||
3562 CCGenDiagnostics) {
3563 StringRef Name = llvm::sys::path::filename(BaseInput);
3564 std::pair<StringRef, StringRef> Split = Name.split('.');
3565 std::string TmpName = GetTemporaryPath(
3566 Split.first, types::getTypeTempSuffix(JA.getType(), IsCLMode()));
3567 return C.addTempFile(C.getArgs().MakeArgString(TmpName));
3568 }
3569
3570 SmallString<128> BasePath(BaseInput);
3571 StringRef BaseName;
3572
3573 // Dsymutil actions should use the full path.
3574 if (isa<DsymutilJobAction>(JA) || isa<VerifyJobAction>(JA))
3575 BaseName = BasePath;
3576 else
3577 BaseName = llvm::sys::path::filename(BasePath);
3578
3579 // Determine what the derived output name should be.
3580 const char *NamedOutput;
3581
3582 if ((JA.getType() == types::TY_Object || JA.getType() == types::TY_LTO_BC) &&
3583 C.getArgs().hasArg(options::OPT__SLASH_Fo, options::OPT__SLASH_o)) {
3584 // The /Fo or /o flag decides the object filename.
3585 StringRef Val =
3586 C.getArgs()
3587 .getLastArg(options::OPT__SLASH_Fo, options::OPT__SLASH_o)
3588 ->getValue();
3589 NamedOutput =
3590 MakeCLOutputFilename(C.getArgs(), Val, BaseName, types::TY_Object);
3591 } else if (JA.getType() == types::TY_Image &&
3592 C.getArgs().hasArg(options::OPT__SLASH_Fe,
3593 options::OPT__SLASH_o)) {
3594 // The /Fe or /o flag names the linked file.
3595 StringRef Val =
3596 C.getArgs()
3597 .getLastArg(options::OPT__SLASH_Fe, options::OPT__SLASH_o)
3598 ->getValue();
3599 NamedOutput =
3600 MakeCLOutputFilename(C.getArgs(), Val, BaseName, types::TY_Image);
3601 } else if (JA.getType() == types::TY_Image) {
3602 if (IsCLMode()) {
3603 // clang-cl uses BaseName for the executable name.
3604 NamedOutput =
3605 MakeCLOutputFilename(C.getArgs(), "", BaseName, types::TY_Image);
3606 } else {
3607 SmallString<128> Output(getDefaultImageName());
3608 Output += OffloadingPrefix;
3609 if (MultipleArchs && !BoundArch.empty()) {
3610 Output += "-";
3611 Output.append(BoundArch);
3612 }
3613 NamedOutput = C.getArgs().MakeArgString(Output.c_str());
3614 }
3615 } else if (JA.getType() == types::TY_PCH && IsCLMode()) {
3616 NamedOutput = C.getArgs().MakeArgString(GetClPchPath(C, BaseName));
3617 } else {
3618 const char *Suffix = types::getTypeTempSuffix(JA.getType(), IsCLMode());
3619 assert(Suffix && "All types used for output should have a suffix.")(static_cast <bool> (Suffix && "All types used for output should have a suffix."
) ? void (0) : __assert_fail ("Suffix && \"All types used for output should have a suffix.\""
, "/build/llvm-toolchain-snapshot-6.0~svn320940/tools/clang/lib/Driver/Driver.cpp"
, 3619, __extension__ __PRETTY_FUNCTION__))
;
3620
3621 std::string::size_type End = std::string::npos;
3622 if (!types::appendSuffixForType(JA.getType()))
3623 End = BaseName.rfind('.');
3624 SmallString<128> Suffixed(BaseName.substr(0, End));
3625 Suffixed += OffloadingPrefix;
3626 if (MultipleArchs && !BoundArch.empty()) {
3627 Suffixed += "-";
3628 Suffixed.append(BoundArch);
3629 }
3630 // When using both -save-temps and -emit-llvm, use a ".tmp.bc" suffix for
3631 // the unoptimized bitcode so that it does not get overwritten by the ".bc"
3632 // optimized bitcode output.
3633 if (!AtTopLevel && C.getArgs().hasArg(options::OPT_emit_llvm) &&
3634 JA.getType() == types::TY_LLVM_BC)
3635 Suffixed += ".tmp";
3636 Suffixed += '.';
3637 Suffixed += Suffix;
3638 NamedOutput = C.getArgs().MakeArgString(Suffixed.c_str());
3639 }
3640
3641 // Prepend object file path if -save-temps=obj
3642 if (!AtTopLevel && isSaveTempsObj() && C.getArgs().hasArg(options::OPT_o) &&
3643 JA.getType() != types::TY_PCH) {
3644 Arg *FinalOutput = C.getArgs().getLastArg(options::OPT_o);
3645 SmallString<128> TempPath(FinalOutput->getValue());
3646 llvm::sys::path::remove_filename(TempPath);
3647 StringRef OutputFileName = llvm::sys::path::filename(NamedOutput);
3648 llvm::sys::path::append(TempPath, OutputFileName);
3649 NamedOutput = C.getArgs().MakeArgString(TempPath.c_str());
3650 }
3651
3652 // If we're saving temps and the temp file conflicts with the input file,
3653 // then avoid overwriting input file.
3654 if (!AtTopLevel && isSaveTempsEnabled() && NamedOutput == BaseName) {
3655 bool SameFile = false;
3656 SmallString<256> Result;
3657 llvm::sys::fs::current_path(Result);
3658 llvm::sys::path::append(Result, BaseName);
3659 llvm::sys::fs::equivalent(BaseInput, Result.c_str(), SameFile);
3660 // Must share the same path to conflict.
3661 if (SameFile) {
3662 StringRef Name = llvm::sys::path::filename(BaseInput);
3663 std::pair<StringRef, StringRef> Split = Name.split('.');
3664 std::string TmpName = GetTemporaryPath(
3665 Split.first, types::getTypeTempSuffix(JA.getType(), IsCLMode()));
3666 return C.addTempFile(C.getArgs().MakeArgString(TmpName));
3667 }
3668 }
3669
3670 // As an annoying special case, PCH generation doesn't strip the pathname.
3671 if (JA.getType() == types::TY_PCH && !IsCLMode()) {
3672 llvm::sys::path::remove_filename(BasePath);
3673 if (BasePath.empty())
3674 BasePath = NamedOutput;
3675 else
3676 llvm::sys::path::append(BasePath, NamedOutput);
3677 return C.addResultFile(C.getArgs().MakeArgString(BasePath.c_str()), &JA);
3678 } else {
3679 return C.addResultFile(NamedOutput, &JA);
3680 }
3681}
3682
3683std::string Driver::GetFilePath(StringRef Name, const ToolChain &TC) const {
3684 // Respect a limited subset of the '-Bprefix' functionality in GCC by
3685 // attempting to use this prefix when looking for file paths.
3686 for (const std::string &Dir : PrefixDirs) {
3687 if (Dir.empty())
3688 continue;
3689 SmallString<128> P(Dir[0] == '=' ? SysRoot + Dir.substr(1) : Dir);
3690 llvm::sys::path::append(P, Name);
3691 if (llvm::sys::fs::exists(Twine(P)))
3692 return P.str();
3693 }
3694
3695 SmallString<128> R(ResourceDir);
3696 llvm::sys::path::append(R, Name);
3697 if (llvm::sys::fs::exists(Twine(R)))
3698 return R.str();
3699
3700 SmallString<128> P(TC.getCompilerRTPath());
3701 llvm::sys::path::append(P, Name);
3702 if (llvm::sys::fs::exists(Twine(P)))
3703 return P.str();
3704
3705 for (const std::string &Dir : TC.getFilePaths()) {
3706 if (Dir.empty())
3707 continue;
3708 SmallString<128> P(Dir[0] == '=' ? SysRoot + Dir.substr(1) : Dir);
3709 llvm::sys::path::append(P, Name);
3710 if (llvm::sys::fs::exists(Twine(P)))
3711 return P.str();
3712 }
3713
3714 return Name;
3715}
3716
3717void Driver::generatePrefixedToolNames(
3718 StringRef Tool, const ToolChain &TC,
3719 SmallVectorImpl<std::string> &Names) const {
3720 // FIXME: Needs a better variable than DefaultTargetTriple
3721 Names.emplace_back((DefaultTargetTriple + "-" + Tool).str());
3722 Names.emplace_back(Tool);
3723
3724 // Allow the discovery of tools prefixed with LLVM's default target triple.
3725 std::string LLVMDefaultTargetTriple = llvm::sys::getDefaultTargetTriple();
3726 if (LLVMDefaultTargetTriple != DefaultTargetTriple)
3727 Names.emplace_back((LLVMDefaultTargetTriple + "-" + Tool).str());
3728}
3729
3730static bool ScanDirForExecutable(SmallString<128> &Dir,
3731 ArrayRef<std::string> Names) {
3732 for (const auto &Name : Names) {
3733 llvm::sys::path::append(Dir, Name);
3734 if (llvm::sys::fs::can_execute(Twine(Dir)))
3735 return true;
3736 llvm::sys::path::remove_filename(Dir);
3737 }
3738 return false;
3739}
3740
3741std::string Driver::GetProgramPath(StringRef Name, const ToolChain &TC) const {
3742 SmallVector<std::string, 2> TargetSpecificExecutables;
3743 generatePrefixedToolNames(Name, TC, TargetSpecificExecutables);
3744
3745 // Respect a limited subset of the '-Bprefix' functionality in GCC by
3746 // attempting to use this prefix when looking for program paths.
3747 for (const auto &PrefixDir : PrefixDirs) {
3748 if (llvm::sys::fs::is_directory(PrefixDir)) {
3749 SmallString<128> P(PrefixDir);
3750 if (ScanDirForExecutable(P, TargetSpecificExecutables))
3751 return P.str();
3752 } else {
3753 SmallString<128> P((PrefixDir + Name).str());
3754 if (llvm::sys::fs::can_execute(Twine(P)))
3755 return P.str();
3756 }
3757 }
3758
3759 const ToolChain::path_list &List = TC.getProgramPaths();
3760 for (const auto &Path : List) {
3761 SmallString<128> P(Path);
3762 if (ScanDirForExecutable(P, TargetSpecificExecutables))
3763 return P.str();
3764 }
3765
3766 // If all else failed, search the path.
3767 for (const auto &TargetSpecificExecutable : TargetSpecificExecutables)
3768 if (llvm::ErrorOr<std::string> P =
3769 llvm::sys::findProgramByName(TargetSpecificExecutable))
3770 return *P;
3771
3772 return Name;
3773}
3774
3775std::string Driver::GetTemporaryPath(StringRef Prefix, StringRef Suffix) const {
3776 SmallString<128> Path;
3777 std::error_code EC = llvm::sys::fs::createTemporaryFile(Prefix, Suffix, Path);
3778 if (EC) {
3779 Diag(clang::diag::err_unable_to_make_temp) << EC.message();
3780 return "";
3781 }
3782
3783 return Path.str();
3784}
3785
3786std::string Driver::GetClPchPath(Compilation &C, StringRef BaseName) const {
3787 SmallString<128> Output;
3788 if (Arg *FpArg = C.getArgs().getLastArg(options::OPT__SLASH_Fp)) {
3789 // FIXME: If anybody needs it, implement this obscure rule:
3790 // "If you specify a directory without a file name, the default file name
3791 // is VCx0.pch., where x is the major version of Visual C++ in use."
3792 Output = FpArg->getValue();
3793
3794 // "If you do not specify an extension as part of the path name, an
3795 // extension of .pch is assumed. "
3796 if (!llvm::sys::path::has_extension(Output))
3797 Output += ".pch";
3798 } else {
3799 Output = BaseName;
3800 llvm::sys::path::replace_extension(Output, ".pch");
3801 }
3802 return Output.str();
3803}
3804
3805const ToolChain &Driver::getToolChain(const ArgList &Args,
3806 const llvm::Triple &Target) const {
3807
3808 auto &TC = ToolChains[Target.str()];
3809 if (!TC) {
3810 switch (Target.getOS()) {
3811 case llvm::Triple::Haiku:
3812 TC = llvm::make_unique<toolchains::Haiku>(*this, Target, Args);
3813 break;
3814 case llvm::Triple::Ananas:
3815 TC = llvm::make_unique<toolchains::Ananas>(*this, Target, Args);
3816 break;
3817 case llvm::Triple::CloudABI:
3818 TC = llvm::make_unique<toolchains::CloudABI>(*this, Target, Args);
3819 break;
3820 case llvm::Triple::Darwin:
3821 case llvm::Triple::MacOSX:
3822 case llvm::Triple::IOS:
3823 case llvm::Triple::TvOS:
3824 case llvm::Triple::WatchOS:
3825 TC = llvm::make_unique<toolchains::DarwinClang>(*this, Target, Args);
3826 break;
3827 case llvm::Triple::DragonFly:
3828 TC = llvm::make_unique<toolchains::DragonFly>(*this, Target, Args);
3829 break;
3830 case llvm::Triple::OpenBSD:
3831 TC = llvm::make_unique<toolchains::OpenBSD>(*this, Target, Args);
3832 break;
3833 case llvm::Triple::NetBSD:
3834 TC = llvm::make_unique<toolchains::NetBSD>(*this, Target, Args);
3835 break;
3836 case llvm::Triple::FreeBSD:
3837 TC = llvm::make_unique<toolchains::FreeBSD>(*this, Target, Args);
3838 break;
3839 case llvm::Triple::Minix:
3840 TC = llvm::make_unique<toolchains::Minix>(*this, Target, Args);
3841 break;
3842 case llvm::Triple::Linux:
3843 case llvm::Triple::ELFIAMCU:
3844 if (Target.getArch() == llvm::Triple::hexagon)
3845 TC = llvm::make_unique<toolchains::HexagonToolChain>(*this, Target,
3846 Args);
3847 else if ((Target.getVendor() == llvm::Triple::MipsTechnologies) &&
3848 !Target.hasEnvironment())
3849 TC = llvm::make_unique<toolchains::MipsLLVMToolChain>(*this, Target,
3850 Args);
3851 else
3852 TC = llvm::make_unique<toolchains::Linux>(*this, Target, Args);
3853 break;
3854 case llvm::Triple::NaCl:
3855 TC = llvm::make_unique<toolchains::NaClToolChain>(*this, Target, Args);
3856 break;
3857 case llvm::Triple::Fuchsia:
3858 TC = llvm::make_unique<toolchains::Fuchsia>(*this, Target, Args);
3859 break;
3860 case llvm::Triple::Solaris:
3861 TC = llvm::make_unique<toolchains::Solaris>(*this, Target, Args);
3862 break;
3863 case llvm::Triple::AMDHSA:
3864 TC = llvm::make_unique<toolchains::AMDGPUToolChain>(*this, Target, Args);
3865 break;
3866 case llvm::Triple::Win32:
3867 switch (Target.getEnvironment()) {
3868 default:
3869 if (Target.isOSBinFormatELF())
3870 TC = llvm::make_unique<toolchains::Generic_ELF>(*this, Target, Args);
3871 else if (Target.isOSBinFormatMachO())
3872 TC = llvm::make_unique<toolchains::MachO>(*this, Target, Args);
3873 else
3874 TC = llvm::make_unique<toolchains::Generic_GCC>(*this, Target, Args);
3875 break;
3876 case llvm::Triple::GNU:
3877 TC = llvm::make_unique<toolchains::MinGW>(*this, Target, Args);
3878 break;
3879 case llvm::Triple::Itanium:
3880 TC = llvm::make_unique<toolchains::CrossWindowsToolChain>(*this, Target,
3881 Args);
3882 break;
3883 case llvm::Triple::MSVC:
3884 case llvm::Triple::UnknownEnvironment:
3885 if (Args.getLastArgValue(options::OPT_fuse_ld_EQ)
3886 .startswith_lower("bfd"))
3887 TC = llvm::make_unique<toolchains::CrossWindowsToolChain>(
3888 *this, Target, Args);
3889 else
3890 TC =
3891 llvm::make_unique<toolchains::MSVCToolChain>(*this, Target, Args);
3892 break;
3893 }
3894 break;
3895 case llvm::Triple::PS4:
3896 TC = llvm::make_unique<toolchains::PS4CPU>(*this, Target, Args);
3897 break;
3898 case llvm::Triple::Contiki:
3899 TC = llvm::make_unique<toolchains::Contiki>(*this, Target, Args);
3900 break;
3901 default:
3902 // Of these targets, Hexagon is the only one that might have
3903 // an OS of Linux, in which case it got handled above already.
3904 switch (Target.getArch()) {
3905 case llvm::Triple::tce:
3906 TC = llvm::make_unique<toolchains::TCEToolChain>(*this, Target, Args);
3907 break;
3908 case llvm::Triple::tcele:
3909 TC = llvm::make_unique<toolchains::TCELEToolChain>(*this, Target, Args);
3910 break;
3911 case llvm::Triple::hexagon:
3912 TC = llvm::make_unique<toolchains::HexagonToolChain>(*this, Target,
3913 Args);
3914 break;
3915 case llvm::Triple::lanai:
3916 TC = llvm::make_unique<toolchains::LanaiToolChain>(*this, Target, Args);
3917 break;
3918 case llvm::Triple::xcore:
3919 TC = llvm::make_unique<toolchains::XCoreToolChain>(*this, Target, Args);
3920 break;
3921 case llvm::Triple::wasm32:
3922 case llvm::Triple::wasm64:
3923 TC = llvm::make_unique<toolchains::WebAssembly>(*this, Target, Args);
3924 break;
3925 case llvm::Triple::avr:
3926 TC = llvm::make_unique<toolchains::AVRToolChain>(*this, Target, Args);
3927 break;
3928 default:
3929 if (Target.getVendor() == llvm::Triple::Myriad)
3930 TC = llvm::make_unique<toolchains::MyriadToolChain>(*this, Target,
3931 Args);
3932 else if (toolchains::BareMetal::handlesTarget(Target))
3933 TC = llvm::make_unique<toolchains::BareMetal>(*this, Target, Args);
3934 else if (Target.isOSBinFormatELF())
3935 TC = llvm::make_unique<toolchains::Generic_ELF>(*this, Target, Args);
3936 else if (Target.isOSBinFormatMachO())
3937 TC = llvm::make_unique<toolchains::MachO>(*this, Target, Args);
3938 else
3939 TC = llvm::make_unique<toolchains::Generic_GCC>(*this, Target, Args);
3940 }
3941 }
3942 }
3943
3944 // Intentionally omitted from the switch above: llvm::Triple::CUDA. CUDA
3945 // compiles always need two toolchains, the CUDA toolchain and the host
3946 // toolchain. So the only valid way to create a CUDA toolchain is via
3947 // CreateOffloadingDeviceToolChains.
3948
3949 return *TC;
3950}
3951
3952bool Driver::ShouldUseClangCompiler(const JobAction &JA) const {
3953 // Say "no" if there is not exactly one input of a type clang understands.
3954 if (JA.size() != 1 ||
3955 !types::isAcceptedByClang((*JA.input_begin())->getType()))
3956 return false;
3957
3958 // And say "no" if this is not a kind of action clang understands.
3959 if (!isa<PreprocessJobAction>(JA) && !isa<PrecompileJobAction>(JA) &&
3960 !isa<CompileJobAction>(JA) && !isa<BackendJobAction>(JA))
3961 return false;
3962
3963 return true;
3964}
3965
3966/// GetReleaseVersion - Parse (([0-9]+)(.([0-9]+)(.([0-9]+)?))?)? and return the
3967/// grouped values as integers. Numbers which are not provided are set to 0.
3968///
3969/// \return True if the entire string was parsed (9.2), or all groups were
3970/// parsed (10.3.5extrastuff).
3971bool Driver::GetReleaseVersion(StringRef Str, unsigned &Major, unsigned &Minor,
3972 unsigned &Micro, bool &HadExtra) {
3973 HadExtra = false;
3974
3975 Major = Minor = Micro = 0;
3976 if (Str.empty())
3977 return false;
3978
3979 if (Str.consumeInteger(10, Major))
3980 return false;
3981 if (Str.empty())
3982 return true;
3983 if (Str[0] != '.')
3984 return false;
3985
3986 Str = Str.drop_front(1);
3987
3988 if (Str.consumeInteger(10, Minor))
3989 return false;
3990 if (Str.empty())
3991 return true;
3992 if (Str[0] != '.')
3993 return false;
3994 Str = Str.drop_front(1);
3995
3996 if (Str.consumeInteger(10, Micro))
3997 return false;
3998 if (!Str.empty())
3999 HadExtra = true;
4000 return true;
4001}
4002
4003/// Parse digits from a string \p Str and fulfill \p Digits with
4004/// the parsed numbers. This method assumes that the max number of
4005/// digits to look for is equal to Digits.size().
4006///
4007/// \return True if the entire string was parsed and there are
4008/// no extra characters remaining at the end.
4009bool Driver::GetReleaseVersion(StringRef Str,
4010 MutableArrayRef<unsigned> Digits) {
4011 if (Str.empty())
4012 return false;
4013
4014 unsigned CurDigit = 0;
4015 while (CurDigit < Digits.size()) {
4016 unsigned Digit;
4017 if (Str.consumeInteger(10, Digit))
4018 return false;
4019 Digits[CurDigit] = Digit;
4020 if (Str.empty())
4021 return true;
4022 if (Str[0] != '.')
4023 return false;
4024 Str = Str.drop_front(1);
4025 CurDigit++;
4026 }
4027
4028 // More digits than requested, bail out...
4029 return false;
4030}
4031
4032std::pair<unsigned, unsigned> Driver::getIncludeExcludeOptionFlagMasks() const {
4033 unsigned IncludedFlagsBitmask = 0;
4034 unsigned ExcludedFlagsBitmask = options::NoDriverOption;
4035
4036 if (Mode == CLMode) {
4037 // Include CL and Core options.
4038 IncludedFlagsBitmask |= options::CLOption;
4039 IncludedFlagsBitmask |= options::CoreOption;
4040 } else {
4041 ExcludedFlagsBitmask |= options::CLOption;
4042 }
4043
4044 return std::make_pair(IncludedFlagsBitmask, ExcludedFlagsBitmask);
4045}
4046
4047bool clang::driver::isOptimizationLevelFast(const ArgList &Args) {
4048 return Args.hasFlag(options::OPT_Ofast, options::OPT_O_Group, false);
4049}