clang  7.0.0svn
CommonArgs.cpp
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1 //===--- CommonArgs.cpp - Args handling for multiple toolchains -*- C++ -*-===//
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 "CommonArgs.h"
11 #include "Arch/AArch64.h"
12 #include "Arch/ARM.h"
13 #include "Arch/Mips.h"
14 #include "Arch/PPC.h"
15 #include "Arch/SystemZ.h"
16 #include "Arch/X86.h"
17 #include "Hexagon.h"
18 #include "InputInfo.h"
19 #include "clang/Basic/CharInfo.h"
22 #include "clang/Basic/Version.h"
24 #include "clang/Config/config.h"
25 #include "clang/Driver/Action.h"
27 #include "clang/Driver/Driver.h"
29 #include "clang/Driver/Job.h"
30 #include "clang/Driver/Options.h"
32 #include "clang/Driver/ToolChain.h"
33 #include "clang/Driver/Util.h"
34 #include "clang/Driver/XRayArgs.h"
35 #include "llvm/ADT/STLExtras.h"
36 #include "llvm/ADT/SmallString.h"
37 #include "llvm/ADT/StringExtras.h"
38 #include "llvm/ADT/StringSwitch.h"
39 #include "llvm/ADT/Twine.h"
40 #include "llvm/Option/Arg.h"
41 #include "llvm/Option/ArgList.h"
42 #include "llvm/Option/Option.h"
43 #include "llvm/Support/CodeGen.h"
44 #include "llvm/Support/Compression.h"
45 #include "llvm/Support/Debug.h"
46 #include "llvm/Support/ErrorHandling.h"
47 #include "llvm/Support/FileSystem.h"
48 #include "llvm/Support/Host.h"
49 #include "llvm/Support/Path.h"
50 #include "llvm/Support/Process.h"
51 #include "llvm/Support/Program.h"
52 #include "llvm/Support/ScopedPrinter.h"
53 #include "llvm/Support/TargetParser.h"
54 #include "llvm/Support/YAMLParser.h"
55 
56 using namespace clang::driver;
57 using namespace clang::driver::tools;
58 using namespace clang;
59 using namespace llvm::opt;
60 
61 void tools::addPathIfExists(const Driver &D, const Twine &Path,
62  ToolChain::path_list &Paths) {
63  if (D.getVFS().exists(Path))
64  Paths.push_back(Path.str());
65 }
66 
67 void tools::handleTargetFeaturesGroup(const ArgList &Args,
68  std::vector<StringRef> &Features,
69  OptSpecifier Group) {
70  for (const Arg *A : Args.filtered(Group)) {
71  StringRef Name = A->getOption().getName();
72  A->claim();
73 
74  // Skip over "-m".
75  assert(Name.startswith("m") && "Invalid feature name.");
76  Name = Name.substr(1);
77 
78  bool IsNegative = Name.startswith("no-");
79  if (IsNegative)
80  Name = Name.substr(3);
81  Features.push_back(Args.MakeArgString((IsNegative ? "-" : "+") + Name));
82  }
83 }
84 
85 void tools::addDirectoryList(const ArgList &Args, ArgStringList &CmdArgs,
86  const char *ArgName, const char *EnvVar) {
87  const char *DirList = ::getenv(EnvVar);
88  bool CombinedArg = false;
89 
90  if (!DirList)
91  return; // Nothing to do.
92 
93  StringRef Name(ArgName);
94  if (Name.equals("-I") || Name.equals("-L"))
95  CombinedArg = true;
96 
97  StringRef Dirs(DirList);
98  if (Dirs.empty()) // Empty string should not add '.'.
99  return;
100 
101  StringRef::size_type Delim;
102  while ((Delim = Dirs.find(llvm::sys::EnvPathSeparator)) != StringRef::npos) {
103  if (Delim == 0) { // Leading colon.
104  if (CombinedArg) {
105  CmdArgs.push_back(Args.MakeArgString(std::string(ArgName) + "."));
106  } else {
107  CmdArgs.push_back(ArgName);
108  CmdArgs.push_back(".");
109  }
110  } else {
111  if (CombinedArg) {
112  CmdArgs.push_back(
113  Args.MakeArgString(std::string(ArgName) + Dirs.substr(0, Delim)));
114  } else {
115  CmdArgs.push_back(ArgName);
116  CmdArgs.push_back(Args.MakeArgString(Dirs.substr(0, Delim)));
117  }
118  }
119  Dirs = Dirs.substr(Delim + 1);
120  }
121 
122  if (Dirs.empty()) { // Trailing colon.
123  if (CombinedArg) {
124  CmdArgs.push_back(Args.MakeArgString(std::string(ArgName) + "."));
125  } else {
126  CmdArgs.push_back(ArgName);
127  CmdArgs.push_back(".");
128  }
129  } else { // Add the last path.
130  if (CombinedArg) {
131  CmdArgs.push_back(Args.MakeArgString(std::string(ArgName) + Dirs));
132  } else {
133  CmdArgs.push_back(ArgName);
134  CmdArgs.push_back(Args.MakeArgString(Dirs));
135  }
136  }
137 }
138 
139 void tools::AddLinkerInputs(const ToolChain &TC, const InputInfoList &Inputs,
140  const ArgList &Args, ArgStringList &CmdArgs,
141  const JobAction &JA) {
142  const Driver &D = TC.getDriver();
143 
144  // Add extra linker input arguments which are not treated as inputs
145  // (constructed via -Xarch_).
146  Args.AddAllArgValues(CmdArgs, options::OPT_Zlinker_input);
147 
148  for (const auto &II : Inputs) {
149  // If the current tool chain refers to an OpenMP or HIP offloading host, we
150  // should ignore inputs that refer to OpenMP or HIP offloading devices -
151  // they will be embedded according to a proper linker script.
152  if (auto *IA = II.getAction())
154  IA->isDeviceOffloading(Action::OFK_OpenMP)) ||
156  IA->isDeviceOffloading(Action::OFK_HIP)))
157  continue;
158 
159  if (!TC.HasNativeLLVMSupport() && types::isLLVMIR(II.getType()))
160  // Don't try to pass LLVM inputs unless we have native support.
161  D.Diag(diag::err_drv_no_linker_llvm_support) << TC.getTripleString();
162 
163  // Add filenames immediately.
164  if (II.isFilename()) {
165  CmdArgs.push_back(II.getFilename());
166  continue;
167  }
168 
169  // Otherwise, this is a linker input argument.
170  const Arg &A = II.getInputArg();
171 
172  // Handle reserved library options.
173  if (A.getOption().matches(options::OPT_Z_reserved_lib_stdcxx))
174  TC.AddCXXStdlibLibArgs(Args, CmdArgs);
175  else if (A.getOption().matches(options::OPT_Z_reserved_lib_cckext))
176  TC.AddCCKextLibArgs(Args, CmdArgs);
177  else if (A.getOption().matches(options::OPT_z)) {
178  // Pass -z prefix for gcc linker compatibility.
179  A.claim();
180  A.render(Args, CmdArgs);
181  } else {
182  A.renderAsInput(Args, CmdArgs);
183  }
184  }
185 
186  // LIBRARY_PATH - included following the user specified library paths.
187  // and only supported on native toolchains.
188  if (!TC.isCrossCompiling()) {
189  addDirectoryList(Args, CmdArgs, "-L", "LIBRARY_PATH");
190  }
191 }
192 
193 void tools::AddTargetFeature(const ArgList &Args,
194  std::vector<StringRef> &Features,
195  OptSpecifier OnOpt, OptSpecifier OffOpt,
196  StringRef FeatureName) {
197  if (Arg *A = Args.getLastArg(OnOpt, OffOpt)) {
198  if (A->getOption().matches(OnOpt))
199  Features.push_back(Args.MakeArgString("+" + FeatureName));
200  else
201  Features.push_back(Args.MakeArgString("-" + FeatureName));
202  }
203 }
204 
205 /// Get the (LLVM) name of the R600 gpu we are targeting.
206 static std::string getR600TargetGPU(const ArgList &Args) {
207  if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
208  const char *GPUName = A->getValue();
209  return llvm::StringSwitch<const char *>(GPUName)
210  .Cases("rv630", "rv635", "r600")
211  .Cases("rv610", "rv620", "rs780", "rs880")
212  .Case("rv740", "rv770")
213  .Case("palm", "cedar")
214  .Cases("sumo", "sumo2", "sumo")
215  .Case("hemlock", "cypress")
216  .Case("aruba", "cayman")
217  .Default(GPUName);
218  }
219  return "";
220 }
221 
222 static std::string getNios2TargetCPU(const ArgList &Args) {
223  Arg *A = Args.getLastArg(options::OPT_mcpu_EQ);
224  if (!A)
225  A = Args.getLastArg(options::OPT_march_EQ);
226 
227  if (!A)
228  return "";
229 
230  const char *name = A->getValue();
231  return llvm::StringSwitch<const char *>(name)
232  .Case("r1", "nios2r1")
233  .Case("r2", "nios2r2")
234  .Default(name);
235 }
236 
237 static std::string getLanaiTargetCPU(const ArgList &Args) {
238  if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
239  return A->getValue();
240  }
241  return "";
242 }
243 
244 /// Get the (LLVM) name of the WebAssembly cpu we are targeting.
245 static StringRef getWebAssemblyTargetCPU(const ArgList &Args) {
246  // If we have -mcpu=, use that.
247  if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
248  StringRef CPU = A->getValue();
249 
250 #ifdef __wasm__
251  // Handle "native" by examining the host. "native" isn't meaningful when
252  // cross compiling, so only support this when the host is also WebAssembly.
253  if (CPU == "native")
254  return llvm::sys::getHostCPUName();
255 #endif
256 
257  return CPU;
258  }
259 
260  return "generic";
261 }
262 
263 std::string tools::getCPUName(const ArgList &Args, const llvm::Triple &T,
264  bool FromAs) {
265  Arg *A;
266 
267  switch (T.getArch()) {
268  default:
269  return "";
270 
271  case llvm::Triple::aarch64:
272  case llvm::Triple::aarch64_be:
273  return aarch64::getAArch64TargetCPU(Args, A);
274 
275  case llvm::Triple::arm:
276  case llvm::Triple::armeb:
277  case llvm::Triple::thumb:
278  case llvm::Triple::thumbeb: {
279  StringRef MArch, MCPU;
280  arm::getARMArchCPUFromArgs(Args, MArch, MCPU, FromAs);
281  return arm::getARMTargetCPU(MCPU, MArch, T);
282  }
283 
284  case llvm::Triple::avr:
285  if (const Arg *A = Args.getLastArg(options::OPT_mmcu_EQ))
286  return A->getValue();
287  return "";
288 
289  case llvm::Triple::nios2: {
290  return getNios2TargetCPU(Args);
291  }
292 
293  case llvm::Triple::mips:
294  case llvm::Triple::mipsel:
295  case llvm::Triple::mips64:
296  case llvm::Triple::mips64el: {
297  StringRef CPUName;
298  StringRef ABIName;
299  mips::getMipsCPUAndABI(Args, T, CPUName, ABIName);
300  return CPUName;
301  }
302 
303  case llvm::Triple::nvptx:
304  case llvm::Triple::nvptx64:
305  if (const Arg *A = Args.getLastArg(options::OPT_march_EQ))
306  return A->getValue();
307  return "";
308 
309  case llvm::Triple::ppc:
310  case llvm::Triple::ppc64:
311  case llvm::Triple::ppc64le: {
312  std::string TargetCPUName = ppc::getPPCTargetCPU(Args);
313  // LLVM may default to generating code for the native CPU,
314  // but, like gcc, we default to a more generic option for
315  // each architecture. (except on Darwin)
316  if (TargetCPUName.empty() && !T.isOSDarwin()) {
317  if (T.getArch() == llvm::Triple::ppc64)
318  TargetCPUName = "ppc64";
319  else if (T.getArch() == llvm::Triple::ppc64le)
320  TargetCPUName = "ppc64le";
321  else
322  TargetCPUName = "ppc";
323  }
324  return TargetCPUName;
325  }
326 
327  case llvm::Triple::bpfel:
328  case llvm::Triple::bpfeb:
329  case llvm::Triple::sparc:
330  case llvm::Triple::sparcel:
331  case llvm::Triple::sparcv9:
332  if (const Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
333  return A->getValue();
334  return "";
335 
336  case llvm::Triple::x86:
337  case llvm::Triple::x86_64:
338  return x86::getX86TargetCPU(Args, T);
339 
340  case llvm::Triple::hexagon:
341  return "hexagon" +
343 
344  case llvm::Triple::lanai:
345  return getLanaiTargetCPU(Args);
346 
347  case llvm::Triple::systemz:
348  return systemz::getSystemZTargetCPU(Args);
349 
350  case llvm::Triple::r600:
351  case llvm::Triple::amdgcn:
352  return getR600TargetGPU(Args);
353 
354  case llvm::Triple::wasm32:
355  case llvm::Triple::wasm64:
356  return getWebAssemblyTargetCPU(Args);
357  }
358 }
359 
360 unsigned tools::getLTOParallelism(const ArgList &Args, const Driver &D) {
361  unsigned Parallelism = 0;
362  Arg *LtoJobsArg = Args.getLastArg(options::OPT_flto_jobs_EQ);
363  if (LtoJobsArg &&
364  StringRef(LtoJobsArg->getValue()).getAsInteger(10, Parallelism))
365  D.Diag(diag::err_drv_invalid_int_value) << LtoJobsArg->getAsString(Args)
366  << LtoJobsArg->getValue();
367  return Parallelism;
368 }
369 
370 // CloudABI uses -ffunction-sections and -fdata-sections by default.
371 bool tools::isUseSeparateSections(const llvm::Triple &Triple) {
372  return Triple.getOS() == llvm::Triple::CloudABI;
373 }
374 
375 void tools::AddGoldPlugin(const ToolChain &ToolChain, const ArgList &Args,
376  ArgStringList &CmdArgs, const InputInfo &Output,
377  const InputInfo &Input, bool IsThinLTO) {
378  // Tell the linker to load the plugin. This has to come before AddLinkerInputs
379  // as gold requires -plugin to come before any -plugin-opt that -Wl might
380  // forward.
381  CmdArgs.push_back("-plugin");
382 
383 #if defined(_WIN32)
384  const char *Suffix = ".dll";
385 #elif defined(__APPLE__)
386  const char *Suffix = ".dylib";
387 #else
388  const char *Suffix = ".so";
389 #endif
390 
391  SmallString<1024> Plugin;
392  llvm::sys::path::native(Twine(ToolChain.getDriver().Dir) +
393  "/../lib" CLANG_LIBDIR_SUFFIX "/LLVMgold" +
394  Suffix,
395  Plugin);
396  CmdArgs.push_back(Args.MakeArgString(Plugin));
397 
398  // Try to pass driver level flags relevant to LTO code generation down to
399  // the plugin.
400 
401  // Handle flags for selecting CPU variants.
402  std::string CPU = getCPUName(Args, ToolChain.getTriple());
403  if (!CPU.empty())
404  CmdArgs.push_back(Args.MakeArgString(Twine("-plugin-opt=mcpu=") + CPU));
405 
406  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
407  StringRef OOpt;
408  if (A->getOption().matches(options::OPT_O4) ||
409  A->getOption().matches(options::OPT_Ofast))
410  OOpt = "3";
411  else if (A->getOption().matches(options::OPT_O))
412  OOpt = A->getValue();
413  else if (A->getOption().matches(options::OPT_O0))
414  OOpt = "0";
415  if (!OOpt.empty())
416  CmdArgs.push_back(Args.MakeArgString(Twine("-plugin-opt=O") + OOpt));
417  }
418 
419  if (IsThinLTO)
420  CmdArgs.push_back("-plugin-opt=thinlto");
421 
422  if (unsigned Parallelism = getLTOParallelism(Args, ToolChain.getDriver()))
423  CmdArgs.push_back(
424  Args.MakeArgString("-plugin-opt=jobs=" + Twine(Parallelism)));
425 
426  // If an explicit debugger tuning argument appeared, pass it along.
427  if (Arg *A = Args.getLastArg(options::OPT_gTune_Group,
428  options::OPT_ggdbN_Group)) {
429  if (A->getOption().matches(options::OPT_glldb))
430  CmdArgs.push_back("-plugin-opt=-debugger-tune=lldb");
431  else if (A->getOption().matches(options::OPT_gsce))
432  CmdArgs.push_back("-plugin-opt=-debugger-tune=sce");
433  else
434  CmdArgs.push_back("-plugin-opt=-debugger-tune=gdb");
435  }
436 
437  bool UseSeparateSections =
439 
440  if (Args.hasFlag(options::OPT_ffunction_sections,
441  options::OPT_fno_function_sections, UseSeparateSections)) {
442  CmdArgs.push_back("-plugin-opt=-function-sections");
443  }
444 
445  if (Args.hasFlag(options::OPT_fdata_sections, options::OPT_fno_data_sections,
446  UseSeparateSections)) {
447  CmdArgs.push_back("-plugin-opt=-data-sections");
448  }
449 
450  if (Arg *A = getLastProfileSampleUseArg(Args)) {
451  StringRef FName = A->getValue();
452  if (!llvm::sys::fs::exists(FName))
453  ToolChain.getDriver().Diag(diag::err_drv_no_such_file) << FName;
454  else
455  CmdArgs.push_back(
456  Args.MakeArgString(Twine("-plugin-opt=sample-profile=") + FName));
457  }
458 
459  // Need this flag to turn on new pass manager via Gold plugin.
460  if (Args.hasFlag(options::OPT_fexperimental_new_pass_manager,
461  options::OPT_fno_experimental_new_pass_manager,
462  /* Default */ ENABLE_EXPERIMENTAL_NEW_PASS_MANAGER)) {
463  CmdArgs.push_back("-plugin-opt=new-pass-manager");
464  }
465 
466  // Setup statistics file output.
467  SmallString<128> StatsFile =
468  getStatsFileName(Args, Output, Input, ToolChain.getDriver());
469  if (!StatsFile.empty())
470  CmdArgs.push_back(
471  Args.MakeArgString(Twine("-plugin-opt=stats-file=") + StatsFile));
472 }
473 
474 void tools::addArchSpecificRPath(const ToolChain &TC, const ArgList &Args,
475  ArgStringList &CmdArgs) {
476  if (!Args.hasFlag(options::OPT_frtlib_add_rpath,
477  options::OPT_fno_rtlib_add_rpath, false))
478  return;
479 
480  std::string CandidateRPath = TC.getArchSpecificLibPath();
481  if (TC.getVFS().exists(CandidateRPath)) {
482  CmdArgs.push_back("-rpath");
483  CmdArgs.push_back(Args.MakeArgString(CandidateRPath.c_str()));
484  }
485 }
486 
487 bool tools::addOpenMPRuntime(ArgStringList &CmdArgs, const ToolChain &TC,
488  const ArgList &Args, bool IsOffloadingHost,
489  bool GompNeedsRT) {
490  if (!Args.hasFlag(options::OPT_fopenmp, options::OPT_fopenmp_EQ,
491  options::OPT_fno_openmp, false))
492  return false;
493 
494  switch (TC.getDriver().getOpenMPRuntime(Args)) {
495  case Driver::OMPRT_OMP:
496  CmdArgs.push_back("-lomp");
497  break;
498  case Driver::OMPRT_GOMP:
499  CmdArgs.push_back("-lgomp");
500 
501  if (GompNeedsRT)
502  CmdArgs.push_back("-lrt");
503  break;
504  case Driver::OMPRT_IOMP5:
505  CmdArgs.push_back("-liomp5");
506  break;
508  // Already diagnosed.
509  return false;
510  }
511 
512  if (IsOffloadingHost)
513  CmdArgs.push_back("-lomptarget");
514 
515  addArchSpecificRPath(TC, Args, CmdArgs);
516 
517  return true;
518 }
519 
520 static void addSanitizerRuntime(const ToolChain &TC, const ArgList &Args,
521  ArgStringList &CmdArgs, StringRef Sanitizer,
522  bool IsShared, bool IsWhole) {
523  // Wrap any static runtimes that must be forced into executable in
524  // whole-archive.
525  if (IsWhole) CmdArgs.push_back("--whole-archive");
526  CmdArgs.push_back(TC.getCompilerRTArgString(Args, Sanitizer, IsShared));
527  if (IsWhole) CmdArgs.push_back("--no-whole-archive");
528 
529  if (IsShared) {
530  addArchSpecificRPath(TC, Args, CmdArgs);
531  }
532 }
533 
534 // Tries to use a file with the list of dynamic symbols that need to be exported
535 // from the runtime library. Returns true if the file was found.
536 static bool addSanitizerDynamicList(const ToolChain &TC, const ArgList &Args,
537  ArgStringList &CmdArgs,
538  StringRef Sanitizer) {
539  // Solaris ld defaults to --export-dynamic behaviour but doesn't support
540  // the option, so don't try to pass it.
541  if (TC.getTriple().getOS() == llvm::Triple::Solaris)
542  return true;
543  // Myriad is static linking only. Furthermore, some versions of its
544  // linker have the bug where --export-dynamic overrides -static, so
545  // don't use --export-dynamic on that platform.
546  if (TC.getTriple().getVendor() == llvm::Triple::Myriad)
547  return true;
548  SmallString<128> SanRT(TC.getCompilerRT(Args, Sanitizer));
549  if (llvm::sys::fs::exists(SanRT + ".syms")) {
550  CmdArgs.push_back(Args.MakeArgString("--dynamic-list=" + SanRT + ".syms"));
551  return true;
552  }
553  return false;
554 }
555 
556 void tools::linkSanitizerRuntimeDeps(const ToolChain &TC,
557  ArgStringList &CmdArgs) {
558  // Force linking against the system libraries sanitizers depends on
559  // (see PR15823 why this is necessary).
560  CmdArgs.push_back("--no-as-needed");
561  // There's no libpthread or librt on RTEMS.
562  if (TC.getTriple().getOS() != llvm::Triple::RTEMS) {
563  CmdArgs.push_back("-lpthread");
564  if (TC.getTriple().getOS() != llvm::Triple::OpenBSD)
565  CmdArgs.push_back("-lrt");
566  }
567  CmdArgs.push_back("-lm");
568  // There's no libdl on all OSes.
569  if (TC.getTriple().getOS() != llvm::Triple::FreeBSD &&
570  TC.getTriple().getOS() != llvm::Triple::NetBSD &&
571  TC.getTriple().getOS() != llvm::Triple::OpenBSD &&
572  TC.getTriple().getOS() != llvm::Triple::RTEMS)
573  CmdArgs.push_back("-ldl");
574  // Required for backtrace on some OSes
575  if (TC.getTriple().getOS() == llvm::Triple::NetBSD ||
576  TC.getTriple().getOS() == llvm::Triple::FreeBSD)
577  CmdArgs.push_back("-lexecinfo");
578 }
579 
580 static void
581 collectSanitizerRuntimes(const ToolChain &TC, const ArgList &Args,
582  SmallVectorImpl<StringRef> &SharedRuntimes,
583  SmallVectorImpl<StringRef> &StaticRuntimes,
584  SmallVectorImpl<StringRef> &NonWholeStaticRuntimes,
585  SmallVectorImpl<StringRef> &HelperStaticRuntimes,
586  SmallVectorImpl<StringRef> &RequiredSymbols) {
587  const SanitizerArgs &SanArgs = TC.getSanitizerArgs();
588  // Collect shared runtimes.
589  if (SanArgs.needsSharedRt()) {
590  if (SanArgs.needsAsanRt()) {
591  SharedRuntimes.push_back("asan");
592  if (!Args.hasArg(options::OPT_shared) && !TC.getTriple().isAndroid())
593  HelperStaticRuntimes.push_back("asan-preinit");
594  }
595  if (SanArgs.needsUbsanRt()) {
596  if (SanArgs.requiresMinimalRuntime()) {
597  SharedRuntimes.push_back("ubsan_minimal");
598  } else {
599  SharedRuntimes.push_back("ubsan_standalone");
600  }
601  }
602  if (SanArgs.needsScudoRt())
603  SharedRuntimes.push_back("scudo");
604  if (SanArgs.needsHwasanRt())
605  SharedRuntimes.push_back("hwasan");
606  }
607 
608  // The stats_client library is also statically linked into DSOs.
609  if (SanArgs.needsStatsRt())
610  StaticRuntimes.push_back("stats_client");
611 
612  // Collect static runtimes.
613  if (Args.hasArg(options::OPT_shared) || SanArgs.needsSharedRt()) {
614  // Don't link static runtimes into DSOs or if -shared-libasan.
615  return;
616  }
617  if (SanArgs.needsAsanRt()) {
618  StaticRuntimes.push_back("asan");
619  if (SanArgs.linkCXXRuntimes())
620  StaticRuntimes.push_back("asan_cxx");
621  }
622 
623  if (SanArgs.needsHwasanRt()) {
624  StaticRuntimes.push_back("hwasan");
625  if (SanArgs.linkCXXRuntimes())
626  StaticRuntimes.push_back("hwasan_cxx");
627  }
628  if (SanArgs.needsDfsanRt())
629  StaticRuntimes.push_back("dfsan");
630  if (SanArgs.needsLsanRt())
631  StaticRuntimes.push_back("lsan");
632  if (SanArgs.needsMsanRt()) {
633  StaticRuntimes.push_back("msan");
634  if (SanArgs.linkCXXRuntimes())
635  StaticRuntimes.push_back("msan_cxx");
636  }
637  if (SanArgs.needsTsanRt()) {
638  StaticRuntimes.push_back("tsan");
639  if (SanArgs.linkCXXRuntimes())
640  StaticRuntimes.push_back("tsan_cxx");
641  }
642  if (SanArgs.needsUbsanRt()) {
643  if (SanArgs.requiresMinimalRuntime()) {
644  StaticRuntimes.push_back("ubsan_minimal");
645  } else {
646  StaticRuntimes.push_back("ubsan_standalone");
647  if (SanArgs.linkCXXRuntimes())
648  StaticRuntimes.push_back("ubsan_standalone_cxx");
649  }
650  }
651  if (SanArgs.needsSafeStackRt()) {
652  NonWholeStaticRuntimes.push_back("safestack");
653  RequiredSymbols.push_back("__safestack_init");
654  }
655  if (SanArgs.needsCfiRt())
656  StaticRuntimes.push_back("cfi");
657  if (SanArgs.needsCfiDiagRt()) {
658  StaticRuntimes.push_back("cfi_diag");
659  if (SanArgs.linkCXXRuntimes())
660  StaticRuntimes.push_back("ubsan_standalone_cxx");
661  }
662  if (SanArgs.needsStatsRt()) {
663  NonWholeStaticRuntimes.push_back("stats");
664  RequiredSymbols.push_back("__sanitizer_stats_register");
665  }
666  if (SanArgs.needsEsanRt())
667  StaticRuntimes.push_back("esan");
668  if (SanArgs.needsScudoRt()) {
669  StaticRuntimes.push_back("scudo");
670  if (SanArgs.linkCXXRuntimes())
671  StaticRuntimes.push_back("scudo_cxx");
672  }
673 }
674 
675 // Should be called before we add system libraries (C++ ABI, libstdc++/libc++,
676 // C runtime, etc). Returns true if sanitizer system deps need to be linked in.
677 bool tools::addSanitizerRuntimes(const ToolChain &TC, const ArgList &Args,
678  ArgStringList &CmdArgs) {
679  SmallVector<StringRef, 4> SharedRuntimes, StaticRuntimes,
680  NonWholeStaticRuntimes, HelperStaticRuntimes, RequiredSymbols;
681  collectSanitizerRuntimes(TC, Args, SharedRuntimes, StaticRuntimes,
682  NonWholeStaticRuntimes, HelperStaticRuntimes,
683  RequiredSymbols);
684 
685  // Inject libfuzzer dependencies.
686  if (TC.getSanitizerArgs().needsFuzzer()
687  && !Args.hasArg(options::OPT_shared)) {
688 
689  addSanitizerRuntime(TC, Args, CmdArgs, "fuzzer", false, true);
690  if (!Args.hasArg(clang::driver::options::OPT_nostdlibxx))
691  TC.AddCXXStdlibLibArgs(Args, CmdArgs);
692  }
693 
694  for (auto RT : SharedRuntimes)
695  addSanitizerRuntime(TC, Args, CmdArgs, RT, true, false);
696  for (auto RT : HelperStaticRuntimes)
697  addSanitizerRuntime(TC, Args, CmdArgs, RT, false, true);
698  bool AddExportDynamic = false;
699  for (auto RT : StaticRuntimes) {
700  addSanitizerRuntime(TC, Args, CmdArgs, RT, false, true);
701  AddExportDynamic |= !addSanitizerDynamicList(TC, Args, CmdArgs, RT);
702  }
703  for (auto RT : NonWholeStaticRuntimes) {
704  addSanitizerRuntime(TC, Args, CmdArgs, RT, false, false);
705  AddExportDynamic |= !addSanitizerDynamicList(TC, Args, CmdArgs, RT);
706  }
707  for (auto S : RequiredSymbols) {
708  CmdArgs.push_back("-u");
709  CmdArgs.push_back(Args.MakeArgString(S));
710  }
711  // If there is a static runtime with no dynamic list, force all the symbols
712  // to be dynamic to be sure we export sanitizer interface functions.
713  if (AddExportDynamic)
714  CmdArgs.push_back("--export-dynamic");
715 
716  const SanitizerArgs &SanArgs = TC.getSanitizerArgs();
717  if (SanArgs.hasCrossDsoCfi() && !AddExportDynamic)
718  CmdArgs.push_back("-export-dynamic-symbol=__cfi_check");
719 
720  return !StaticRuntimes.empty() || !NonWholeStaticRuntimes.empty();
721 }
722 
723 bool tools::addXRayRuntime(const ToolChain&TC, const ArgList &Args, ArgStringList &CmdArgs) {
724  if (Args.hasArg(options::OPT_shared))
725  return false;
726 
727  if (TC.getXRayArgs().needsXRayRt()) {
728  CmdArgs.push_back("-whole-archive");
729  CmdArgs.push_back(TC.getCompilerRTArgString(Args, "xray", false));
730  for (const auto &Mode : TC.getXRayArgs().modeList())
731  CmdArgs.push_back(TC.getCompilerRTArgString(Args, Mode, false));
732  CmdArgs.push_back("-no-whole-archive");
733  return true;
734  }
735 
736  return false;
737 }
738 
739 void tools::linkXRayRuntimeDeps(const ToolChain &TC, ArgStringList &CmdArgs) {
740  CmdArgs.push_back("--no-as-needed");
741  CmdArgs.push_back("-lpthread");
742  if (TC.getTriple().getOS() != llvm::Triple::OpenBSD)
743  CmdArgs.push_back("-lrt");
744  CmdArgs.push_back("-lm");
745 
746  if (TC.getTriple().getOS() != llvm::Triple::FreeBSD &&
747  TC.getTriple().getOS() != llvm::Triple::NetBSD &&
748  TC.getTriple().getOS() != llvm::Triple::OpenBSD)
749  CmdArgs.push_back("-ldl");
750 }
751 
752 bool tools::areOptimizationsEnabled(const ArgList &Args) {
753  // Find the last -O arg and see if it is non-zero.
754  if (Arg *A = Args.getLastArg(options::OPT_O_Group))
755  return !A->getOption().matches(options::OPT_O0);
756  // Defaults to -O0.
757  return false;
758 }
759 
760 const char *tools::SplitDebugName(const ArgList &Args, const InputInfo &Input) {
761  Arg *FinalOutput = Args.getLastArg(options::OPT_o);
762  if (FinalOutput && Args.hasArg(options::OPT_c)) {
763  SmallString<128> T(FinalOutput->getValue());
764  llvm::sys::path::replace_extension(T, "dwo");
765  return Args.MakeArgString(T);
766  } else {
767  // Use the compilation dir.
769  Args.getLastArgValue(options::OPT_fdebug_compilation_dir));
770  SmallString<128> F(llvm::sys::path::stem(Input.getBaseInput()));
771  llvm::sys::path::replace_extension(F, "dwo");
772  T += F;
773  return Args.MakeArgString(F);
774  }
775 }
776 
777 void tools::SplitDebugInfo(const ToolChain &TC, Compilation &C, const Tool &T,
778  const JobAction &JA, const ArgList &Args,
779  const InputInfo &Output, const char *OutFile) {
780  ArgStringList ExtractArgs;
781  ExtractArgs.push_back("--extract-dwo");
782 
783  ArgStringList StripArgs;
784  StripArgs.push_back("--strip-dwo");
785 
786  // Grabbing the output of the earlier compile step.
787  StripArgs.push_back(Output.getFilename());
788  ExtractArgs.push_back(Output.getFilename());
789  ExtractArgs.push_back(OutFile);
790 
791  const char *Exec =
792  Args.MakeArgString(TC.GetProgramPath(CLANG_DEFAULT_OBJCOPY));
793  InputInfo II(types::TY_Object, Output.getFilename(), Output.getFilename());
794 
795  // First extract the dwo sections.
796  C.addCommand(llvm::make_unique<Command>(JA, T, Exec, ExtractArgs, II));
797 
798  // Then remove them from the original .o file.
799  C.addCommand(llvm::make_unique<Command>(JA, T, Exec, StripArgs, II));
800 }
801 
802 // Claim options we don't want to warn if they are unused. We do this for
803 // options that build systems might add but are unused when assembling or only
804 // running the preprocessor for example.
805 void tools::claimNoWarnArgs(const ArgList &Args) {
806  // Don't warn about unused -f(no-)?lto. This can happen when we're
807  // preprocessing, precompiling or assembling.
808  Args.ClaimAllArgs(options::OPT_flto_EQ);
809  Args.ClaimAllArgs(options::OPT_flto);
810  Args.ClaimAllArgs(options::OPT_fno_lto);
811 }
812 
813 Arg *tools::getLastProfileUseArg(const ArgList &Args) {
814  auto *ProfileUseArg = Args.getLastArg(
815  options::OPT_fprofile_instr_use, options::OPT_fprofile_instr_use_EQ,
816  options::OPT_fprofile_use, options::OPT_fprofile_use_EQ,
817  options::OPT_fno_profile_instr_use);
818 
819  if (ProfileUseArg &&
820  ProfileUseArg->getOption().matches(options::OPT_fno_profile_instr_use))
821  ProfileUseArg = nullptr;
822 
823  return ProfileUseArg;
824 }
825 
826 Arg *tools::getLastProfileSampleUseArg(const ArgList &Args) {
827  auto *ProfileSampleUseArg = Args.getLastArg(
828  options::OPT_fprofile_sample_use, options::OPT_fprofile_sample_use_EQ,
829  options::OPT_fauto_profile, options::OPT_fauto_profile_EQ,
830  options::OPT_fno_profile_sample_use, options::OPT_fno_auto_profile);
831 
832  if (ProfileSampleUseArg &&
833  (ProfileSampleUseArg->getOption().matches(
834  options::OPT_fno_profile_sample_use) ||
835  ProfileSampleUseArg->getOption().matches(options::OPT_fno_auto_profile)))
836  return nullptr;
837 
838  return Args.getLastArg(options::OPT_fprofile_sample_use_EQ,
839  options::OPT_fauto_profile_EQ);
840 }
841 
842 /// Parses the various -fpic/-fPIC/-fpie/-fPIE arguments. Then,
843 /// smooshes them together with platform defaults, to decide whether
844 /// this compile should be using PIC mode or not. Returns a tuple of
845 /// (RelocationModel, PICLevel, IsPIE).
846 std::tuple<llvm::Reloc::Model, unsigned, bool>
847 tools::ParsePICArgs(const ToolChain &ToolChain, const ArgList &Args) {
848  const llvm::Triple &EffectiveTriple = ToolChain.getEffectiveTriple();
849  const llvm::Triple &Triple = ToolChain.getTriple();
850 
851  bool PIE = ToolChain.isPIEDefault();
852  bool PIC = PIE || ToolChain.isPICDefault();
853  // The Darwin/MachO default to use PIC does not apply when using -static.
854  if (Triple.isOSBinFormatMachO() && Args.hasArg(options::OPT_static))
855  PIE = PIC = false;
856  bool IsPICLevelTwo = PIC;
857 
858  bool KernelOrKext =
859  Args.hasArg(options::OPT_mkernel, options::OPT_fapple_kext);
860 
861  // Android-specific defaults for PIC/PIE
862  if (Triple.isAndroid()) {
863  switch (Triple.getArch()) {
864  case llvm::Triple::arm:
865  case llvm::Triple::armeb:
866  case llvm::Triple::thumb:
867  case llvm::Triple::thumbeb:
868  case llvm::Triple::aarch64:
869  case llvm::Triple::mips:
870  case llvm::Triple::mipsel:
871  case llvm::Triple::mips64:
872  case llvm::Triple::mips64el:
873  PIC = true; // "-fpic"
874  break;
875 
876  case llvm::Triple::x86:
877  case llvm::Triple::x86_64:
878  PIC = true; // "-fPIC"
879  IsPICLevelTwo = true;
880  break;
881 
882  default:
883  break;
884  }
885  }
886 
887  // OpenBSD-specific defaults for PIE
888  if (Triple.getOS() == llvm::Triple::OpenBSD) {
889  switch (ToolChain.getArch()) {
890  case llvm::Triple::arm:
891  case llvm::Triple::aarch64:
892  case llvm::Triple::mips64:
893  case llvm::Triple::mips64el:
894  case llvm::Triple::x86:
895  case llvm::Triple::x86_64:
896  IsPICLevelTwo = false; // "-fpie"
897  break;
898 
899  case llvm::Triple::ppc:
900  case llvm::Triple::sparc:
901  case llvm::Triple::sparcel:
902  case llvm::Triple::sparcv9:
903  IsPICLevelTwo = true; // "-fPIE"
904  break;
905 
906  default:
907  break;
908  }
909  }
910 
911  // AMDGPU-specific defaults for PIC.
912  if (Triple.getArch() == llvm::Triple::amdgcn)
913  PIC = true;
914 
915  // The last argument relating to either PIC or PIE wins, and no
916  // other argument is used. If the last argument is any flavor of the
917  // '-fno-...' arguments, both PIC and PIE are disabled. Any PIE
918  // option implicitly enables PIC at the same level.
919  Arg *LastPICArg = Args.getLastArg(options::OPT_fPIC, options::OPT_fno_PIC,
920  options::OPT_fpic, options::OPT_fno_pic,
921  options::OPT_fPIE, options::OPT_fno_PIE,
922  options::OPT_fpie, options::OPT_fno_pie);
923  if (Triple.isOSWindows() && LastPICArg &&
924  LastPICArg ==
925  Args.getLastArg(options::OPT_fPIC, options::OPT_fpic,
926  options::OPT_fPIE, options::OPT_fpie)) {
927  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
928  << LastPICArg->getSpelling() << Triple.str();
929  if (Triple.getArch() == llvm::Triple::x86_64)
930  return std::make_tuple(llvm::Reloc::PIC_, 2U, false);
931  return std::make_tuple(llvm::Reloc::Static, 0U, false);
932  }
933 
934  // Check whether the tool chain trumps the PIC-ness decision. If the PIC-ness
935  // is forced, then neither PIC nor PIE flags will have no effect.
936  if (!ToolChain.isPICDefaultForced()) {
937  if (LastPICArg) {
938  Option O = LastPICArg->getOption();
939  if (O.matches(options::OPT_fPIC) || O.matches(options::OPT_fpic) ||
940  O.matches(options::OPT_fPIE) || O.matches(options::OPT_fpie)) {
941  PIE = O.matches(options::OPT_fPIE) || O.matches(options::OPT_fpie);
942  PIC =
943  PIE || O.matches(options::OPT_fPIC) || O.matches(options::OPT_fpic);
944  IsPICLevelTwo =
945  O.matches(options::OPT_fPIE) || O.matches(options::OPT_fPIC);
946  } else {
947  PIE = PIC = false;
948  if (EffectiveTriple.isPS4CPU()) {
949  Arg *ModelArg = Args.getLastArg(options::OPT_mcmodel_EQ);
950  StringRef Model = ModelArg ? ModelArg->getValue() : "";
951  if (Model != "kernel") {
952  PIC = true;
953  ToolChain.getDriver().Diag(diag::warn_drv_ps4_force_pic)
954  << LastPICArg->getSpelling();
955  }
956  }
957  }
958  }
959  }
960 
961  // Introduce a Darwin and PS4-specific hack. If the default is PIC, but the
962  // PIC level would've been set to level 1, force it back to level 2 PIC
963  // instead.
964  if (PIC && (Triple.isOSDarwin() || EffectiveTriple.isPS4CPU()))
965  IsPICLevelTwo |= ToolChain.isPICDefault();
966 
967  // This kernel flags are a trump-card: they will disable PIC/PIE
968  // generation, independent of the argument order.
969  if (KernelOrKext &&
970  ((!EffectiveTriple.isiOS() || EffectiveTriple.isOSVersionLT(6)) &&
971  !EffectiveTriple.isWatchOS()))
972  PIC = PIE = false;
973 
974  if (Arg *A = Args.getLastArg(options::OPT_mdynamic_no_pic)) {
975  // This is a very special mode. It trumps the other modes, almost no one
976  // uses it, and it isn't even valid on any OS but Darwin.
977  if (!Triple.isOSDarwin())
978  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
979  << A->getSpelling() << Triple.str();
980 
981  // FIXME: Warn when this flag trumps some other PIC or PIE flag.
982 
983  // Only a forced PIC mode can cause the actual compile to have PIC defines
984  // etc., no flags are sufficient. This behavior was selected to closely
985  // match that of llvm-gcc and Apple GCC before that.
986  PIC = ToolChain.isPICDefault() && ToolChain.isPICDefaultForced();
987 
988  return std::make_tuple(llvm::Reloc::DynamicNoPIC, PIC ? 2U : 0U, false);
989  }
990 
991  bool EmbeddedPISupported;
992  switch (Triple.getArch()) {
993  case llvm::Triple::arm:
994  case llvm::Triple::armeb:
995  case llvm::Triple::thumb:
996  case llvm::Triple::thumbeb:
997  EmbeddedPISupported = true;
998  break;
999  default:
1000  EmbeddedPISupported = false;
1001  break;
1002  }
1003 
1004  bool ROPI = false, RWPI = false;
1005  Arg* LastROPIArg = Args.getLastArg(options::OPT_fropi, options::OPT_fno_ropi);
1006  if (LastROPIArg && LastROPIArg->getOption().matches(options::OPT_fropi)) {
1007  if (!EmbeddedPISupported)
1008  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
1009  << LastROPIArg->getSpelling() << Triple.str();
1010  ROPI = true;
1011  }
1012  Arg *LastRWPIArg = Args.getLastArg(options::OPT_frwpi, options::OPT_fno_rwpi);
1013  if (LastRWPIArg && LastRWPIArg->getOption().matches(options::OPT_frwpi)) {
1014  if (!EmbeddedPISupported)
1015  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
1016  << LastRWPIArg->getSpelling() << Triple.str();
1017  RWPI = true;
1018  }
1019 
1020  // ROPI and RWPI are not compatible with PIC or PIE.
1021  if ((ROPI || RWPI) && (PIC || PIE))
1022  ToolChain.getDriver().Diag(diag::err_drv_ropi_rwpi_incompatible_with_pic);
1023 
1024  if (Triple.getArch() == llvm::Triple::mips ||
1025  Triple.getArch() == llvm::Triple::mipsel ||
1026  Triple.getArch() == llvm::Triple::mips64 ||
1027  Triple.getArch() == llvm::Triple::mips64el) {
1028  StringRef CPUName;
1029  StringRef ABIName;
1030  mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName);
1031  // When targeting the N64 ABI, PIC is the default, except in the case
1032  // when the -mno-abicalls option is used. In that case we exit
1033  // at next check regardless of PIC being set below.
1034  if (ABIName == "n64")
1035  PIC = true;
1036  // When targettng MIPS with -mno-abicalls, it's always static.
1037  if(Args.hasArg(options::OPT_mno_abicalls))
1038  return std::make_tuple(llvm::Reloc::Static, 0U, false);
1039  // Unlike other architectures, MIPS, even with -fPIC/-mxgot/multigot,
1040  // does not use PIC level 2 for historical reasons.
1041  IsPICLevelTwo = false;
1042  }
1043 
1044  if (PIC)
1045  return std::make_tuple(llvm::Reloc::PIC_, IsPICLevelTwo ? 2U : 1U, PIE);
1046 
1047  llvm::Reloc::Model RelocM = llvm::Reloc::Static;
1048  if (ROPI && RWPI)
1049  RelocM = llvm::Reloc::ROPI_RWPI;
1050  else if (ROPI)
1051  RelocM = llvm::Reloc::ROPI;
1052  else if (RWPI)
1053  RelocM = llvm::Reloc::RWPI;
1054 
1055  return std::make_tuple(RelocM, 0U, false);
1056 }
1057 
1058 // `-falign-functions` indicates that the functions should be aligned to a
1059 // 16-byte boundary.
1060 //
1061 // `-falign-functions=1` is the same as `-fno-align-functions`.
1062 //
1063 // The scalar `n` in `-falign-functions=n` must be an integral value between
1064 // [0, 65536]. If the value is not a power-of-two, it will be rounded up to
1065 // the nearest power-of-two.
1066 //
1067 // If we return `0`, the frontend will default to the backend's preferred
1068 // alignment.
1069 //
1070 // NOTE: icc only allows values between [0, 4096]. icc uses `-falign-functions`
1071 // to mean `-falign-functions=16`. GCC defaults to the backend's preferred
1072 // alignment. For unaligned functions, we default to the backend's preferred
1073 // alignment.
1074 unsigned tools::ParseFunctionAlignment(const ToolChain &TC,
1075  const ArgList &Args) {
1076  const Arg *A = Args.getLastArg(options::OPT_falign_functions,
1077  options::OPT_falign_functions_EQ,
1078  options::OPT_fno_align_functions);
1079  if (!A || A->getOption().matches(options::OPT_fno_align_functions))
1080  return 0;
1081 
1082  if (A->getOption().matches(options::OPT_falign_functions))
1083  return 0;
1084 
1085  unsigned Value = 0;
1086  if (StringRef(A->getValue()).getAsInteger(10, Value) || Value > 65536)
1087  TC.getDriver().Diag(diag::err_drv_invalid_int_value)
1088  << A->getAsString(Args) << A->getValue();
1089  return Value ? llvm::Log2_32_Ceil(std::min(Value, 65536u)) : Value;
1090 }
1091 
1092 void tools::AddAssemblerKPIC(const ToolChain &ToolChain, const ArgList &Args,
1093  ArgStringList &CmdArgs) {
1094  llvm::Reloc::Model RelocationModel;
1095  unsigned PICLevel;
1096  bool IsPIE;
1097  std::tie(RelocationModel, PICLevel, IsPIE) = ParsePICArgs(ToolChain, Args);
1098 
1099  if (RelocationModel != llvm::Reloc::Static)
1100  CmdArgs.push_back("-KPIC");
1101 }
1102 
1103 /// Determine whether Objective-C automated reference counting is
1104 /// enabled.
1105 bool tools::isObjCAutoRefCount(const ArgList &Args) {
1106  return Args.hasFlag(options::OPT_fobjc_arc, options::OPT_fno_objc_arc, false);
1107 }
1108 
1109 static void AddLibgcc(const llvm::Triple &Triple, const Driver &D,
1110  ArgStringList &CmdArgs, const ArgList &Args) {
1111  bool isAndroid = Triple.isAndroid();
1112  bool isCygMing = Triple.isOSCygMing();
1113  bool IsIAMCU = Triple.isOSIAMCU();
1114  bool StaticLibgcc = Args.hasArg(options::OPT_static_libgcc) ||
1115  Args.hasArg(options::OPT_static);
1116  if (!D.CCCIsCXX())
1117  CmdArgs.push_back("-lgcc");
1118 
1119  if (StaticLibgcc || isAndroid) {
1120  if (D.CCCIsCXX())
1121  CmdArgs.push_back("-lgcc");
1122  } else {
1123  if (!D.CCCIsCXX() && !isCygMing)
1124  CmdArgs.push_back("--as-needed");
1125  CmdArgs.push_back("-lgcc_s");
1126  if (!D.CCCIsCXX() && !isCygMing)
1127  CmdArgs.push_back("--no-as-needed");
1128  }
1129 
1130  if (StaticLibgcc && !isAndroid && !IsIAMCU)
1131  CmdArgs.push_back("-lgcc_eh");
1132  else if (!Args.hasArg(options::OPT_shared) && D.CCCIsCXX())
1133  CmdArgs.push_back("-lgcc");
1134 
1135  // According to Android ABI, we have to link with libdl if we are
1136  // linking with non-static libgcc.
1137  //
1138  // NOTE: This fixes a link error on Android MIPS as well. The non-static
1139  // libgcc for MIPS relies on _Unwind_Find_FDE and dl_iterate_phdr from libdl.
1140  if (isAndroid && !StaticLibgcc)
1141  CmdArgs.push_back("-ldl");
1142 }
1143 
1144 void tools::AddRunTimeLibs(const ToolChain &TC, const Driver &D,
1145  ArgStringList &CmdArgs, const ArgList &Args) {
1146  // Make use of compiler-rt if --rtlib option is used
1148 
1149  switch (RLT) {
1151  CmdArgs.push_back(TC.getCompilerRTArgString(Args, "builtins"));
1152  break;
1153  case ToolChain::RLT_Libgcc:
1154  // Make sure libgcc is not used under MSVC environment by default
1155  if (TC.getTriple().isKnownWindowsMSVCEnvironment()) {
1156  // Issue error diagnostic if libgcc is explicitly specified
1157  // through command line as --rtlib option argument.
1158  if (Args.hasArg(options::OPT_rtlib_EQ)) {
1159  TC.getDriver().Diag(diag::err_drv_unsupported_rtlib_for_platform)
1160  << Args.getLastArg(options::OPT_rtlib_EQ)->getValue() << "MSVC";
1161  }
1162  } else
1163  AddLibgcc(TC.getTriple(), D, CmdArgs, Args);
1164  break;
1165  }
1166 }
1167 
1168 /// Add OpenMP linker script arguments at the end of the argument list so that
1169 /// the fat binary is built by embedding each of the device images into the
1170 /// host. The linker script also defines a few symbols required by the code
1171 /// generation so that the images can be easily retrieved at runtime by the
1172 /// offloading library. This should be used only in tool chains that support
1173 /// linker scripts.
1174 void tools::AddOpenMPLinkerScript(const ToolChain &TC, Compilation &C,
1175  const InputInfo &Output,
1176  const InputInfoList &Inputs,
1177  const ArgList &Args, ArgStringList &CmdArgs,
1178  const JobAction &JA) {
1179 
1180  // If this is not an OpenMP host toolchain, we don't need to do anything.
1182  return;
1183 
1184  // Create temporary linker script. Keep it if save-temps is enabled.
1185  const char *LKS;
1186  SmallString<256> Name = llvm::sys::path::filename(Output.getFilename());
1187  if (C.getDriver().isSaveTempsEnabled()) {
1188  llvm::sys::path::replace_extension(Name, "lk");
1189  LKS = C.getArgs().MakeArgString(Name.c_str());
1190  } else {
1191  llvm::sys::path::replace_extension(Name, "");
1192  Name = C.getDriver().GetTemporaryPath(Name, "lk");
1193  LKS = C.addTempFile(C.getArgs().MakeArgString(Name.c_str()));
1194  }
1195 
1196  // Add linker script option to the command.
1197  CmdArgs.push_back("-T");
1198  CmdArgs.push_back(LKS);
1199 
1200  // Create a buffer to write the contents of the linker script.
1201  std::string LksBuffer;
1202  llvm::raw_string_ostream LksStream(LksBuffer);
1203 
1204  // Get the OpenMP offload tool chains so that we can extract the triple
1205  // associated with each device input.
1206  auto OpenMPToolChains = C.getOffloadToolChains<Action::OFK_OpenMP>();
1207  assert(OpenMPToolChains.first != OpenMPToolChains.second &&
1208  "No OpenMP toolchains??");
1209 
1210  // Track the input file name and device triple in order to build the script,
1211  // inserting binaries in the designated sections.
1213 
1214  // Add commands to embed target binaries. We ensure that each section and
1215  // image is 16-byte aligned. This is not mandatory, but increases the
1216  // likelihood of data to be aligned with a cache block in several main host
1217  // machines.
1218  LksStream << "/*\n";
1219  LksStream << " OpenMP Offload Linker Script\n";
1220  LksStream << " *** Automatically generated by Clang ***\n";
1221  LksStream << "*/\n";
1222  LksStream << "TARGET(binary)\n";
1223  auto DTC = OpenMPToolChains.first;
1224  for (auto &II : Inputs) {
1225  const Action *A = II.getAction();
1226  // Is this a device linking action?
1227  if (A && isa<LinkJobAction>(A) &&
1229  assert(DTC != OpenMPToolChains.second &&
1230  "More device inputs than device toolchains??");
1231  InputBinaryInfo.push_back(std::make_pair(
1232  DTC->second->getTriple().normalize(), II.getFilename()));
1233  ++DTC;
1234  LksStream << "INPUT(" << II.getFilename() << ")\n";
1235  }
1236  }
1237 
1238  assert(DTC == OpenMPToolChains.second &&
1239  "Less device inputs than device toolchains??");
1240 
1241  LksStream << "SECTIONS\n";
1242  LksStream << "{\n";
1243 
1244  // Put each target binary into a separate section.
1245  for (const auto &BI : InputBinaryInfo) {
1246  LksStream << " .omp_offloading." << BI.first << " :\n";
1247  LksStream << " ALIGN(0x10)\n";
1248  LksStream << " {\n";
1249  LksStream << " PROVIDE_HIDDEN(.omp_offloading.img_start." << BI.first
1250  << " = .);\n";
1251  LksStream << " " << BI.second << "\n";
1252  LksStream << " PROVIDE_HIDDEN(.omp_offloading.img_end." << BI.first
1253  << " = .);\n";
1254  LksStream << " }\n";
1255  }
1256 
1257  // Add commands to define host entries begin and end. We use 1-byte subalign
1258  // so that the linker does not add any padding and the elements in this
1259  // section form an array.
1260  LksStream << " .omp_offloading.entries :\n";
1261  LksStream << " ALIGN(0x10)\n";
1262  LksStream << " SUBALIGN(0x01)\n";
1263  LksStream << " {\n";
1264  LksStream << " PROVIDE_HIDDEN(.omp_offloading.entries_begin = .);\n";
1265  LksStream << " *(.omp_offloading.entries)\n";
1266  LksStream << " PROVIDE_HIDDEN(.omp_offloading.entries_end = .);\n";
1267  LksStream << " }\n";
1268  LksStream << "}\n";
1269  LksStream << "INSERT BEFORE .data\n";
1270  LksStream.flush();
1271 
1272  // Dump the contents of the linker script if the user requested that. We
1273  // support this option to enable testing of behavior with -###.
1274  if (C.getArgs().hasArg(options::OPT_fopenmp_dump_offload_linker_script))
1275  llvm::errs() << LksBuffer;
1276 
1277  // If this is a dry run, do not create the linker script file.
1278  if (C.getArgs().hasArg(options::OPT__HASH_HASH_HASH))
1279  return;
1280 
1281  // Open script file and write the contents.
1282  std::error_code EC;
1283  llvm::raw_fd_ostream Lksf(LKS, EC, llvm::sys::fs::F_None);
1284 
1285  if (EC) {
1286  C.getDriver().Diag(clang::diag::err_unable_to_make_temp) << EC.message();
1287  return;
1288  }
1289 
1290  Lksf << LksBuffer;
1291 }
1292 
1293 /// Add HIP linker script arguments at the end of the argument list so that
1294 /// the fat binary is built by embedding the device images into the host. The
1295 /// linker script also defines a symbol required by the code generation so that
1296 /// the image can be retrieved at runtime. This should be used only in tool
1297 /// chains that support linker scripts.
1298 void tools::AddHIPLinkerScript(const ToolChain &TC, Compilation &C,
1299  const InputInfo &Output,
1300  const InputInfoList &Inputs, const ArgList &Args,
1301  ArgStringList &CmdArgs, const JobAction &JA,
1302  const Tool &T) {
1303 
1304  // If this is not a HIP host toolchain, we don't need to do anything.
1306  return;
1307 
1308  // Create temporary linker script. Keep it if save-temps is enabled.
1309  const char *LKS;
1310  SmallString<256> Name = llvm::sys::path::filename(Output.getFilename());
1311  if (C.getDriver().isSaveTempsEnabled()) {
1312  llvm::sys::path::replace_extension(Name, "lk");
1313  LKS = C.getArgs().MakeArgString(Name.c_str());
1314  } else {
1315  llvm::sys::path::replace_extension(Name, "");
1316  Name = C.getDriver().GetTemporaryPath(Name, "lk");
1317  LKS = C.addTempFile(C.getArgs().MakeArgString(Name.c_str()));
1318  }
1319 
1320  // Add linker script option to the command.
1321  CmdArgs.push_back("-T");
1322  CmdArgs.push_back(LKS);
1323 
1324  // Create a buffer to write the contents of the linker script.
1325  std::string LksBuffer;
1326  llvm::raw_string_ostream LksStream(LksBuffer);
1327 
1328  // Get the HIP offload tool chain.
1329  auto *HIPTC = static_cast<const toolchains::CudaToolChain *>(
1331  assert(HIPTC->getTriple().getArch() == llvm::Triple::amdgcn &&
1332  "Wrong platform");
1333  (void)HIPTC;
1334 
1335  // Construct clang-offload-bundler command to bundle object files for
1336  // for different GPU archs.
1337  ArgStringList BundlerArgs;
1338  BundlerArgs.push_back(Args.MakeArgString("-type=o"));
1339 
1340  // ToDo: Remove the dummy host binary entry which is required by
1341  // clang-offload-bundler.
1342  std::string BundlerTargetArg = "-targets=host-x86_64-unknown-linux";
1343  std::string BundlerInputArg = "-inputs=/dev/null";
1344 
1345  for (const auto &II : Inputs) {
1346  const Action *A = II.getAction();
1347  // Is this a device linking action?
1348  if (A && isa<LinkJobAction>(A) && A->isDeviceOffloading(Action::OFK_HIP)) {
1349  BundlerTargetArg = BundlerTargetArg + ",hip-amdgcn-amd-amdhsa-" +
1350  StringRef(A->getOffloadingArch()).str();
1351  BundlerInputArg = BundlerInputArg + "," + II.getFilename();
1352  }
1353  }
1354  BundlerArgs.push_back(Args.MakeArgString(BundlerTargetArg));
1355  BundlerArgs.push_back(Args.MakeArgString(BundlerInputArg));
1356 
1357  std::string BundleFileName = C.getDriver().GetTemporaryPath("BUNDLE", "o");
1358  const char *BundleFile =
1359  C.addTempFile(C.getArgs().MakeArgString(BundleFileName.c_str()));
1360  auto BundlerOutputArg =
1361  Args.MakeArgString(std::string("-outputs=").append(BundleFile));
1362  BundlerArgs.push_back(BundlerOutputArg);
1363 
1364  SmallString<128> BundlerPath(C.getDriver().Dir);
1365  llvm::sys::path::append(BundlerPath, "clang-offload-bundler");
1366  const char *Bundler = Args.MakeArgString(BundlerPath);
1367  C.addCommand(llvm::make_unique<Command>(JA, T, Bundler, BundlerArgs, Inputs));
1368 
1369  // Add commands to embed target binaries. We ensure that each section and
1370  // image is 16-byte aligned. This is not mandatory, but increases the
1371  // likelihood of data to be aligned with a cache block in several main host
1372  // machines.
1373  LksStream << "/*\n";
1374  LksStream << " HIP Offload Linker Script\n";
1375  LksStream << " *** Automatically generated by Clang ***\n";
1376  LksStream << "*/\n";
1377  LksStream << "TARGET(binary)\n";
1378  LksStream << "INPUT(" << BundleFileName << ")\n";
1379  LksStream << "SECTIONS\n";
1380  LksStream << "{\n";
1381  LksStream << " .hip_fatbin :\n";
1382  LksStream << " ALIGN(0x10)\n";
1383  LksStream << " {\n";
1384  LksStream << " PROVIDE_HIDDEN(__hip_fatbin = .);\n";
1385  LksStream << " " << BundleFileName << "\n";
1386  LksStream << " }\n";
1387  LksStream << "}\n";
1388  LksStream << "INSERT BEFORE .data\n";
1389  LksStream.flush();
1390 
1391  // Dump the contents of the linker script if the user requested that. We
1392  // support this option to enable testing of behavior with -###.
1393  if (C.getArgs().hasArg(options::OPT_fhip_dump_offload_linker_script))
1394  llvm::errs() << LksBuffer;
1395 
1396  // If this is a dry run, do not create the linker script file.
1397  if (C.getArgs().hasArg(options::OPT__HASH_HASH_HASH))
1398  return;
1399 
1400  // Open script file and write the contents.
1401  std::error_code EC;
1402  llvm::raw_fd_ostream Lksf(LKS, EC, llvm::sys::fs::F_None);
1403 
1404  if (EC) {
1405  C.getDriver().Diag(clang::diag::err_unable_to_make_temp) << EC.message();
1406  return;
1407  }
1408 
1409  Lksf << LksBuffer;
1410 }
1411 
1412 SmallString<128> tools::getStatsFileName(const llvm::opt::ArgList &Args,
1413  const InputInfo &Output,
1414  const InputInfo &Input,
1415  const Driver &D) {
1416  const Arg *A = Args.getLastArg(options::OPT_save_stats_EQ);
1417  if (!A)
1418  return {};
1419 
1420  StringRef SaveStats = A->getValue();
1421  SmallString<128> StatsFile;
1422  if (SaveStats == "obj" && Output.isFilename()) {
1423  StatsFile.assign(Output.getFilename());
1424  llvm::sys::path::remove_filename(StatsFile);
1425  } else if (SaveStats != "cwd") {
1426  D.Diag(diag::err_drv_invalid_value) << A->getAsString(Args) << SaveStats;
1427  return {};
1428  }
1429 
1430  StringRef BaseName = llvm::sys::path::filename(Input.getBaseInput());
1431  llvm::sys::path::append(StatsFile, BaseName);
1432  llvm::sys::path::replace_extension(StatsFile, "stats");
1433  return StatsFile;
1434 }
void handleTargetFeaturesGroup(const llvm::opt::ArgList &Args, std::vector< StringRef > &Features, llvm::opt::OptSpecifier Group)
SmallVector< std::string, 16 > path_list
Definition: ToolChain.h:90
bool addXRayRuntime(const ToolChain &TC, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs)
const char * getSystemZTargetCPU(const llvm::opt::ArgList &Args)
OpenMPRuntimeKind getOpenMPRuntime(const llvm::opt::ArgList &Args) const
Compute the desired OpenMP runtime from the flags provided.
Definition: Driver.cpp:513
virtual void AddCCKextLibArgs(const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const
AddCCKextLibArgs - Add the system specific linker arguments to use for kernel extensions (Darwin-spec...
Definition: ToolChain.cpp:757
std::string GetTemporaryPath(StringRef Prefix, StringRef Suffix) const
GetTemporaryPath - Return the pathname of a temporary file to use as part of compilation; the file wi...
Definition: Driver.cpp:4247
const char * getCompilerRTArgString(const llvm::opt::ArgList &Args, StringRef Component, bool Shared=false) const
Definition: ToolChain.cpp:368
bool isUseSeparateSections(const llvm::Triple &Triple)
Definition: CommonArgs.cpp:371
Defines types useful for describing an Objective-C runtime.
const XRayArgs & getXRayArgs() const
Definition: ToolChain.cpp:108
void AddRunTimeLibs(const ToolChain &TC, const Driver &D, llvm::opt::ArgStringList &CmdArgs, const llvm::opt::ArgList &Args)
void AddHIPLinkerScript(const ToolChain &TC, Compilation &C, const InputInfo &Output, const InputInfoList &Inputs, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs, const JobAction &JA, const Tool &T)
bool isHostOffloading(OffloadKind OKind) const
Check if this action have any offload kinds.
Definition: Action.h:201
DiagnosticBuilder Diag(unsigned DiagID) const
Definition: Driver.h:110
void AddTargetFeature(const llvm::opt::ArgList &Args, std::vector< StringRef > &Features, llvm::opt::OptSpecifier OnOpt, llvm::opt::OptSpecifier OffOpt, StringRef FeatureName)
virtual bool isPICDefaultForced() const =0
Tests whether this toolchain forces its default for PIC, PIE or non-PIC.
static void addSanitizerRuntime(const ToolChain &TC, const ArgList &Args, ArgStringList &CmdArgs, StringRef Sanitizer, bool IsShared, bool IsWhole)
Definition: CommonArgs.cpp:520
static void AddLibgcc(const llvm::Triple &Triple, const Driver &D, ArgStringList &CmdArgs, const ArgList &Args)
std::string getCPUName(const llvm::opt::ArgList &Args, const llvm::Triple &T, bool FromAs=false)
const char * getFilename() const
Definition: InputInfo.h:84
void linkSanitizerRuntimeDeps(const ToolChain &TC, llvm::opt::ArgStringList &CmdArgs)
std::string Dir
The path the driver executable was in, as invoked from the command line.
Definition: Driver.h:121
void AddGoldPlugin(const ToolChain &ToolChain, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs, const InputInfo &Output, const InputInfo &Input, bool IsThinLTO)
std::string getAArch64TargetCPU(const llvm::opt::ArgList &Args, llvm::opt::Arg *&A)
bool addSanitizerRuntimes(const ToolChain &TC, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs)
static bool addSanitizerDynamicList(const ToolChain &TC, const ArgList &Args, ArgStringList &CmdArgs, StringRef Sanitizer)
Definition: CommonArgs.cpp:536
Action - Represent an abstract compilation step to perform.
Definition: Action.h:48
std::string getTripleString() const
Definition: ToolChain.h:206
static std::string getNios2TargetCPU(const ArgList &Args)
Definition: CommonArgs.cpp:222
InputInfo - Wrapper for information about an input source.
Definition: InputInfo.h:23
void addArchSpecificRPath(const ToolChain &TC, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs)
vfs::FileSystem & getVFS() const
Definition: ToolChain.cpp:90
bool isDeviceOffloading(OffloadKind OKind) const
Definition: Action.h:204
The LLVM OpenMP runtime.
Definition: Driver.h:96
Driver - Encapsulate logic for constructing compilation processes from a set of gcc-driver-like comma...
Definition: Driver.h:59
An unknown OpenMP runtime.
Definition: Driver.h:92
bool needsXRayRt() const
Definition: XRayArgs.h:41
bool addOpenMPRuntime(llvm::opt::ArgStringList &CmdArgs, const ToolChain &TC, const llvm::opt::ArgList &Args, bool IsOffloadingHost=false, bool GompNeedsRT=false)
Returns true, if an OpenMP runtime has been added.
void AddOpenMPLinkerScript(const ToolChain &TC, Compilation &C, const InputInfo &Output, const InputInfoList &Inputs, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs, const JobAction &JA)
void addDirectoryList(const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs, const char *ArgName, const char *EnvVar)
void linkXRayRuntimeDeps(const ToolChain &TC, llvm::opt::ArgStringList &CmdArgs)
llvm::ArrayRef< std::string > modeList() const
Definition: XRayArgs.h:42
bool requiresMinimalRuntime() const
Definition: SanitizerArgs.h:68
Defines the clang::LangOptions interface.
static StringRef getWebAssemblyTargetCPU(const ArgList &Args)
Get the (LLVM) name of the WebAssembly cpu we are targeting.
Definition: CommonArgs.cpp:245
virtual bool isPICDefault() const =0
Test whether this toolchain defaults to PIC.
const FunctionProtoType * T
const llvm::Triple & getEffectiveTriple() const
Get the toolchain&#39;s effective clang triple.
Definition: ToolChain.h:211
Defines version macros and version-related utility functions for Clang.
static const StringRef GetTargetCPUVersion(const llvm::opt::ArgList &Args)
Definition: Hexagon.cpp:581
SmallString< 128 > getStatsFileName(const llvm::opt::ArgList &Args, const InputInfo &Output, const InputInfo &Input, const Driver &D)
Handles the -save-stats option and returns the filename to save statistics to.
const char * SplitDebugName(const llvm::opt::ArgList &Args, const InputInfo &Input)
void addCommand(std::unique_ptr< Command > C)
Definition: Compilation.h:206
virtual std::string getCompilerRT(const llvm::opt::ArgList &Args, StringRef Component, bool Shared=false) const
Definition: ToolChain.cpp:350
std::tuple< llvm::Reloc::Model, unsigned, bool > ParsePICArgs(const ToolChain &ToolChain, const llvm::opt::ArgList &Args)
bool isObjCAutoRefCount(const llvm::opt::ArgList &Args)
const char * getX86TargetCPU(const llvm::opt::ArgList &Args, const llvm::Triple &Triple)
const_offload_toolchains_range getOffloadToolChains() const
Definition: Compilation.h:151
unsigned ParseFunctionAlignment(const ToolChain &TC, const llvm::opt::ArgList &Args)
void AddAssemblerKPIC(const ToolChain &ToolChain, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs)
llvm::Triple::ArchType getArch() const
Definition: ToolChain.h:197
const llvm::opt::DerivedArgList & getArgs() const
Definition: Compilation.h:187
vfs::FileSystem & getVFS() const
Definition: Driver.h:301
const Driver & getDriver() const
Definition: ToolChain.h:181
std::string getPPCTargetCPU(const llvm::opt::ArgList &Args)
The legacy name for the LLVM OpenMP runtime from when it was the Intel OpenMP runtime.
Definition: Driver.h:106
bool CCCIsCXX() const
Whether the driver should follow g++ like behavior.
Definition: Driver.h:174
bool isSaveTempsEnabled() const
Definition: Driver.h:329
llvm::opt::Arg * getLastProfileSampleUseArg(const llvm::opt::ArgList &Args)
virtual bool HasNativeLLVMSupport() const
HasNativeLTOLinker - Check whether the linker and related tools have native LLVM support.
Definition: ToolChain.cpp:447
llvm::opt::Arg * getLastProfileUseArg(const llvm::opt::ArgList &Args)
void SplitDebugInfo(const ToolChain &TC, Compilation &C, const Tool &T, const JobAction &JA, const llvm::opt::ArgList &Args, const InputInfo &Output, const char *OutFile)
virtual RuntimeLibType GetRuntimeLibType(const llvm::opt::ArgList &Args) const
Definition: ToolChain.cpp:636
std::string getARMTargetCPU(StringRef CPU, llvm::StringRef Arch, const llvm::Triple &Triple)
Dataflow Directional Tag Classes.
void AddLinkerInputs(const ToolChain &TC, const InputInfoList &Inputs, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs, const JobAction &JA)
unsigned getLTOParallelism(const llvm::opt::ArgList &Args, const Driver &D)
Tool - Information on a specific compilation tool.
Definition: Tool.h:34
Defines the virtual file system interface vfs::FileSystem.
The GNU OpenMP runtime.
Definition: Driver.h:101
const SanitizerArgs & getSanitizerArgs() const
Definition: ToolChain.cpp:102
void getARMArchCPUFromArgs(const llvm::opt::ArgList &Args, llvm::StringRef &Arch, llvm::StringRef &CPU, bool FromAs=false)
bool areOptimizationsEnabled(const llvm::opt::ArgList &Args)
static std::string getLanaiTargetCPU(const ArgList &Args)
Definition: CommonArgs.cpp:237
void claimNoWarnArgs(const llvm::opt::ArgList &Args)
bool exists(const Twine &Path)
Check whether a file exists. Provided for convenience.
virtual bool isPIEDefault() const =0
Test whether this toolchain defaults to PIE.
Compilation - A set of tasks to perform for a single driver invocation.
Definition: Compilation.h:46
const Driver & getDriver() const
Definition: Compilation.h:134
const llvm::Triple & getTriple() const
Definition: ToolChain.h:183
std::string getArchSpecificLibPath() const
Definition: ToolChain.cpp:374
std::string GetProgramPath(const char *Name) const
Definition: ToolChain.cpp:407
const char * getBaseInput() const
Definition: InputInfo.h:79
static std::string getR600TargetGPU(const ArgList &Args)
Get the (LLVM) name of the R600 gpu we are targeting.
Definition: CommonArgs.cpp:206
void addPathIfExists(const Driver &D, const Twine &Path, ToolChain::path_list &Paths)
Definition: CommonArgs.cpp:61
bool isFilename() const
Definition: InputInfo.h:76
virtual bool isCrossCompiling() const
Returns true if the toolchain is targeting a non-native architecture.
Definition: ToolChain.cpp:451
const char * addTempFile(const char *Name)
addTempFile - Add a file to remove on exit, and returns its argument.
Definition: Compilation.h:233
const ToolChain * getSingleOffloadToolChain() const
Return an offload toolchain of the provided kind.
Definition: Compilation.h:164
void getMipsCPUAndABI(const llvm::opt::ArgList &Args, const llvm::Triple &Triple, StringRef &CPUName, StringRef &ABIName)
__DEVICE__ int min(int __a, int __b)
bool isLLVMIR(ID Id)
Is this LLVM IR.
Definition: Types.cpp:154
static void collectSanitizerRuntimes(const ToolChain &TC, const ArgList &Args, SmallVectorImpl< StringRef > &SharedRuntimes, SmallVectorImpl< StringRef > &StaticRuntimes, SmallVectorImpl< StringRef > &NonWholeStaticRuntimes, SmallVectorImpl< StringRef > &HelperStaticRuntimes, SmallVectorImpl< StringRef > &RequiredSymbols)
Definition: CommonArgs.cpp:581
const char * getOffloadingArch() const
Definition: Action.h:197
virtual void AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const
AddCXXStdlibLibArgs - Add the system specific linker arguments to use for the given C++ standard libr...
Definition: ToolChain.cpp:733
ToolChain - Access to tools for a single platform.
Definition: ToolChain.h:88