clang  10.0.0git
CommonArgs.cpp
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1 //===--- CommonArgs.cpp - Args handling for multiple toolchains -*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "CommonArgs.h"
10 #include "Arch/AArch64.h"
11 #include "Arch/ARM.h"
12 #include "Arch/Mips.h"
13 #include "Arch/PPC.h"
14 #include "Arch/SystemZ.h"
15 #include "Arch/X86.h"
16 #include "HIP.h"
17 #include "Hexagon.h"
18 #include "InputInfo.h"
19 #include "clang/Basic/CharInfo.h"
22 #include "clang/Basic/Version.h"
23 #include "clang/Config/config.h"
24 #include "clang/Driver/Action.h"
26 #include "clang/Driver/Driver.h"
28 #include "clang/Driver/Job.h"
29 #include "clang/Driver/Options.h"
31 #include "clang/Driver/ToolChain.h"
32 #include "clang/Driver/Util.h"
33 #include "clang/Driver/XRayArgs.h"
34 #include "llvm/ADT/STLExtras.h"
35 #include "llvm/ADT/SmallString.h"
36 #include "llvm/ADT/StringExtras.h"
37 #include "llvm/ADT/StringSwitch.h"
38 #include "llvm/ADT/Twine.h"
39 #include "llvm/Option/Arg.h"
40 #include "llvm/Option/ArgList.h"
41 #include "llvm/Option/Option.h"
42 #include "llvm/Support/CodeGen.h"
43 #include "llvm/Support/Compression.h"
44 #include "llvm/Support/Debug.h"
45 #include "llvm/Support/ErrorHandling.h"
46 #include "llvm/Support/FileSystem.h"
47 #include "llvm/Support/Host.h"
48 #include "llvm/Support/Path.h"
49 #include "llvm/Support/Process.h"
50 #include "llvm/Support/Program.h"
51 #include "llvm/Support/ScopedPrinter.h"
52 #include "llvm/Support/TargetParser.h"
53 #include "llvm/Support/VirtualFileSystem.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  // LIBRARY_PATH are included before user inputs and only supported on native
149  // toolchains.
150  if (!TC.isCrossCompiling())
151  addDirectoryList(Args, CmdArgs, "-L", "LIBRARY_PATH");
152 
153  for (const auto &II : Inputs) {
154  // If the current tool chain refers to an OpenMP or HIP offloading host, we
155  // should ignore inputs that refer to OpenMP or HIP offloading devices -
156  // they will be embedded according to a proper linker script.
157  if (auto *IA = II.getAction())
159  IA->isDeviceOffloading(Action::OFK_OpenMP)) ||
161  IA->isDeviceOffloading(Action::OFK_HIP)))
162  continue;
163 
164  if (!TC.HasNativeLLVMSupport() && types::isLLVMIR(II.getType()))
165  // Don't try to pass LLVM inputs unless we have native support.
166  D.Diag(diag::err_drv_no_linker_llvm_support) << TC.getTripleString();
167 
168  // Add filenames immediately.
169  if (II.isFilename()) {
170  CmdArgs.push_back(II.getFilename());
171  continue;
172  }
173 
174  // Otherwise, this is a linker input argument.
175  const Arg &A = II.getInputArg();
176 
177  // Handle reserved library options.
178  if (A.getOption().matches(options::OPT_Z_reserved_lib_stdcxx))
179  TC.AddCXXStdlibLibArgs(Args, CmdArgs);
180  else if (A.getOption().matches(options::OPT_Z_reserved_lib_cckext))
181  TC.AddCCKextLibArgs(Args, CmdArgs);
182  else if (A.getOption().matches(options::OPT_z)) {
183  // Pass -z prefix for gcc linker compatibility.
184  A.claim();
185  A.render(Args, CmdArgs);
186  } else {
187  A.renderAsInput(Args, CmdArgs);
188  }
189  }
190 }
191 
192 void tools::AddTargetFeature(const ArgList &Args,
193  std::vector<StringRef> &Features,
194  OptSpecifier OnOpt, OptSpecifier OffOpt,
195  StringRef FeatureName) {
196  if (Arg *A = Args.getLastArg(OnOpt, OffOpt)) {
197  if (A->getOption().matches(OnOpt))
198  Features.push_back(Args.MakeArgString("+" + FeatureName));
199  else
200  Features.push_back(Args.MakeArgString("-" + FeatureName));
201  }
202 }
203 
204 /// Get the (LLVM) name of the R600 gpu we are targeting.
205 static std::string getR600TargetGPU(const ArgList &Args) {
206  if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
207  const char *GPUName = A->getValue();
208  return llvm::StringSwitch<const char *>(GPUName)
209  .Cases("rv630", "rv635", "r600")
210  .Cases("rv610", "rv620", "rs780", "rs880")
211  .Case("rv740", "rv770")
212  .Case("palm", "cedar")
213  .Cases("sumo", "sumo2", "sumo")
214  .Case("hemlock", "cypress")
215  .Case("aruba", "cayman")
216  .Default(GPUName);
217  }
218  return "";
219 }
220 
221 static std::string getLanaiTargetCPU(const ArgList &Args) {
222  if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
223  return A->getValue();
224  }
225  return "";
226 }
227 
228 /// Get the (LLVM) name of the WebAssembly cpu we are targeting.
229 static StringRef getWebAssemblyTargetCPU(const ArgList &Args) {
230  // If we have -mcpu=, use that.
231  if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
232  StringRef CPU = A->getValue();
233 
234 #ifdef __wasm__
235  // Handle "native" by examining the host. "native" isn't meaningful when
236  // cross compiling, so only support this when the host is also WebAssembly.
237  if (CPU == "native")
238  return llvm::sys::getHostCPUName();
239 #endif
240 
241  return CPU;
242  }
243 
244  return "generic";
245 }
246 
247 std::string tools::getCPUName(const ArgList &Args, const llvm::Triple &T,
248  bool FromAs) {
249  Arg *A;
250 
251  switch (T.getArch()) {
252  default:
253  return "";
254 
255  case llvm::Triple::aarch64:
256  case llvm::Triple::aarch64_32:
257  case llvm::Triple::aarch64_be:
258  return aarch64::getAArch64TargetCPU(Args, T, A);
259 
260  case llvm::Triple::arm:
261  case llvm::Triple::armeb:
262  case llvm::Triple::thumb:
263  case llvm::Triple::thumbeb: {
264  StringRef MArch, MCPU;
265  arm::getARMArchCPUFromArgs(Args, MArch, MCPU, FromAs);
266  return arm::getARMTargetCPU(MCPU, MArch, T);
267  }
268 
269  case llvm::Triple::avr:
270  if (const Arg *A = Args.getLastArg(options::OPT_mmcu_EQ))
271  return A->getValue();
272  return "";
273 
274  case llvm::Triple::mips:
275  case llvm::Triple::mipsel:
276  case llvm::Triple::mips64:
277  case llvm::Triple::mips64el: {
278  StringRef CPUName;
279  StringRef ABIName;
280  mips::getMipsCPUAndABI(Args, T, CPUName, ABIName);
281  return CPUName;
282  }
283 
284  case llvm::Triple::nvptx:
285  case llvm::Triple::nvptx64:
286  if (const Arg *A = Args.getLastArg(options::OPT_march_EQ))
287  return A->getValue();
288  return "";
289 
290  case llvm::Triple::ppc:
291  case llvm::Triple::ppc64:
292  case llvm::Triple::ppc64le: {
293  std::string TargetCPUName = ppc::getPPCTargetCPU(Args);
294  // LLVM may default to generating code for the native CPU,
295  // but, like gcc, we default to a more generic option for
296  // each architecture. (except on Darwin)
297  if (TargetCPUName.empty() && !T.isOSDarwin()) {
298  if (T.getArch() == llvm::Triple::ppc64)
299  TargetCPUName = "ppc64";
300  else if (T.getArch() == llvm::Triple::ppc64le)
301  TargetCPUName = "ppc64le";
302  else
303  TargetCPUName = "ppc";
304  }
305  return TargetCPUName;
306  }
307 
308  case llvm::Triple::bpfel:
309  case llvm::Triple::bpfeb:
310  case llvm::Triple::sparc:
311  case llvm::Triple::sparcel:
312  case llvm::Triple::sparcv9:
313  if (const Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
314  return A->getValue();
315  return "";
316 
317  case llvm::Triple::x86:
318  case llvm::Triple::x86_64:
319  return x86::getX86TargetCPU(Args, T);
320 
321  case llvm::Triple::hexagon:
322  return "hexagon" +
324 
325  case llvm::Triple::lanai:
326  return getLanaiTargetCPU(Args);
327 
328  case llvm::Triple::systemz:
329  return systemz::getSystemZTargetCPU(Args);
330 
331  case llvm::Triple::r600:
332  case llvm::Triple::amdgcn:
333  return getR600TargetGPU(Args);
334 
335  case llvm::Triple::wasm32:
336  case llvm::Triple::wasm64:
337  return getWebAssemblyTargetCPU(Args);
338  }
339 }
340 
341 unsigned tools::getLTOParallelism(const ArgList &Args, const Driver &D) {
342  unsigned Parallelism = 0;
343  Arg *LtoJobsArg = Args.getLastArg(options::OPT_flto_jobs_EQ);
344  if (LtoJobsArg &&
345  StringRef(LtoJobsArg->getValue()).getAsInteger(10, Parallelism))
346  D.Diag(diag::err_drv_invalid_int_value) << LtoJobsArg->getAsString(Args)
347  << LtoJobsArg->getValue();
348  return Parallelism;
349 }
350 
351 // CloudABI uses -ffunction-sections and -fdata-sections by default.
352 bool tools::isUseSeparateSections(const llvm::Triple &Triple) {
353  return Triple.getOS() == llvm::Triple::CloudABI;
354 }
355 
356 void tools::AddGoldPlugin(const ToolChain &ToolChain, const ArgList &Args,
357  ArgStringList &CmdArgs, const InputInfo &Output,
358  const InputInfo &Input, bool IsThinLTO) {
359  // Tell the linker to load the plugin. This has to come before AddLinkerInputs
360  // as gold requires -plugin to come before any -plugin-opt that -Wl might
361  // forward.
362  CmdArgs.push_back("-plugin");
363 
364 #if defined(_WIN32)
365  const char *Suffix = ".dll";
366 #elif defined(__APPLE__)
367  const char *Suffix = ".dylib";
368 #else
369  const char *Suffix = ".so";
370 #endif
371 
372  SmallString<1024> Plugin;
373  llvm::sys::path::native(Twine(ToolChain.getDriver().Dir) +
374  "/../lib" CLANG_LIBDIR_SUFFIX "/LLVMgold" +
375  Suffix,
376  Plugin);
377  CmdArgs.push_back(Args.MakeArgString(Plugin));
378 
379  // Try to pass driver level flags relevant to LTO code generation down to
380  // the plugin.
381 
382  // Handle flags for selecting CPU variants.
383  std::string CPU = getCPUName(Args, ToolChain.getTriple());
384  if (!CPU.empty())
385  CmdArgs.push_back(Args.MakeArgString(Twine("-plugin-opt=mcpu=") + CPU));
386 
387  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
388  StringRef OOpt;
389  if (A->getOption().matches(options::OPT_O4) ||
390  A->getOption().matches(options::OPT_Ofast))
391  OOpt = "3";
392  else if (A->getOption().matches(options::OPT_O))
393  OOpt = A->getValue();
394  else if (A->getOption().matches(options::OPT_O0))
395  OOpt = "0";
396  if (!OOpt.empty())
397  CmdArgs.push_back(Args.MakeArgString(Twine("-plugin-opt=O") + OOpt));
398  }
399 
400  if (Args.hasArg(options::OPT_gsplit_dwarf)) {
401  CmdArgs.push_back(
402  Args.MakeArgString(Twine("-plugin-opt=dwo_dir=") +
403  Output.getFilename() + "_dwo"));
404  }
405 
406  if (IsThinLTO)
407  CmdArgs.push_back("-plugin-opt=thinlto");
408 
409  if (unsigned Parallelism = getLTOParallelism(Args, ToolChain.getDriver()))
410  CmdArgs.push_back(
411  Args.MakeArgString("-plugin-opt=jobs=" + Twine(Parallelism)));
412 
413  // If an explicit debugger tuning argument appeared, pass it along.
414  if (Arg *A = Args.getLastArg(options::OPT_gTune_Group,
415  options::OPT_ggdbN_Group)) {
416  if (A->getOption().matches(options::OPT_glldb))
417  CmdArgs.push_back("-plugin-opt=-debugger-tune=lldb");
418  else if (A->getOption().matches(options::OPT_gsce))
419  CmdArgs.push_back("-plugin-opt=-debugger-tune=sce");
420  else
421  CmdArgs.push_back("-plugin-opt=-debugger-tune=gdb");
422  }
423 
424  bool UseSeparateSections =
426 
427  if (Args.hasFlag(options::OPT_ffunction_sections,
428  options::OPT_fno_function_sections, UseSeparateSections)) {
429  CmdArgs.push_back("-plugin-opt=-function-sections");
430  }
431 
432  if (Args.hasFlag(options::OPT_fdata_sections, options::OPT_fno_data_sections,
433  UseSeparateSections)) {
434  CmdArgs.push_back("-plugin-opt=-data-sections");
435  }
436 
437  if (Arg *A = getLastProfileSampleUseArg(Args)) {
438  StringRef FName = A->getValue();
439  if (!llvm::sys::fs::exists(FName))
440  ToolChain.getDriver().Diag(diag::err_drv_no_such_file) << FName;
441  else
442  CmdArgs.push_back(
443  Args.MakeArgString(Twine("-plugin-opt=sample-profile=") + FName));
444  }
445 
446  auto *CSPGOGenerateArg = Args.getLastArg(options::OPT_fcs_profile_generate,
447  options::OPT_fcs_profile_generate_EQ,
448  options::OPT_fno_profile_generate);
449  if (CSPGOGenerateArg &&
450  CSPGOGenerateArg->getOption().matches(options::OPT_fno_profile_generate))
451  CSPGOGenerateArg = nullptr;
452 
453  auto *ProfileUseArg = getLastProfileUseArg(Args);
454 
455  if (CSPGOGenerateArg) {
456  CmdArgs.push_back(Args.MakeArgString("-plugin-opt=cs-profile-generate"));
457  if (CSPGOGenerateArg->getOption().matches(
458  options::OPT_fcs_profile_generate_EQ)) {
459  SmallString<128> Path(CSPGOGenerateArg->getValue());
460  llvm::sys::path::append(Path, "default_%m.profraw");
461  CmdArgs.push_back(
462  Args.MakeArgString(Twine("-plugin-opt=cs-profile-path=") + Path));
463  } else
464  CmdArgs.push_back(
465  Args.MakeArgString("-plugin-opt=cs-profile-path=default_%m.profraw"));
466  } else if (ProfileUseArg) {
467  SmallString<128> Path(
468  ProfileUseArg->getNumValues() == 0 ? "" : ProfileUseArg->getValue());
469  if (Path.empty() || llvm::sys::fs::is_directory(Path))
470  llvm::sys::path::append(Path, "default.profdata");
471  CmdArgs.push_back(Args.MakeArgString(Twine("-plugin-opt=cs-profile-path=") +
472  Path));
473  }
474 
475  // Need this flag to turn on new pass manager via Gold plugin.
476  if (Args.hasFlag(options::OPT_fexperimental_new_pass_manager,
477  options::OPT_fno_experimental_new_pass_manager,
478  /* Default */ ENABLE_EXPERIMENTAL_NEW_PASS_MANAGER)) {
479  CmdArgs.push_back("-plugin-opt=new-pass-manager");
480  }
481 
482  // Setup statistics file output.
483  SmallString<128> StatsFile =
484  getStatsFileName(Args, Output, Input, ToolChain.getDriver());
485  if (!StatsFile.empty())
486  CmdArgs.push_back(
487  Args.MakeArgString(Twine("-plugin-opt=stats-file=") + StatsFile));
488 }
489 
490 void tools::addArchSpecificRPath(const ToolChain &TC, const ArgList &Args,
491  ArgStringList &CmdArgs) {
492  if (!Args.hasFlag(options::OPT_frtlib_add_rpath,
493  options::OPT_fno_rtlib_add_rpath, false))
494  return;
495 
496  std::string CandidateRPath = TC.getArchSpecificLibPath();
497  if (TC.getVFS().exists(CandidateRPath)) {
498  CmdArgs.push_back("-rpath");
499  CmdArgs.push_back(Args.MakeArgString(CandidateRPath.c_str()));
500  }
501 }
502 
503 bool tools::addOpenMPRuntime(ArgStringList &CmdArgs, const ToolChain &TC,
504  const ArgList &Args, bool ForceStaticHostRuntime,
505  bool IsOffloadingHost, bool GompNeedsRT) {
506  if (!Args.hasFlag(options::OPT_fopenmp, options::OPT_fopenmp_EQ,
507  options::OPT_fno_openmp, false))
508  return false;
509 
511 
512  if (RTKind == Driver::OMPRT_Unknown)
513  // Already diagnosed.
514  return false;
515 
516  if (ForceStaticHostRuntime)
517  CmdArgs.push_back("-Bstatic");
518 
519  switch (RTKind) {
520  case Driver::OMPRT_OMP:
521  CmdArgs.push_back("-lomp");
522  break;
523  case Driver::OMPRT_GOMP:
524  CmdArgs.push_back("-lgomp");
525  break;
526  case Driver::OMPRT_IOMP5:
527  CmdArgs.push_back("-liomp5");
528  break;
530  break;
531  }
532 
533  if (ForceStaticHostRuntime)
534  CmdArgs.push_back("-Bdynamic");
535 
536  if (RTKind == Driver::OMPRT_GOMP && GompNeedsRT)
537  CmdArgs.push_back("-lrt");
538 
539  if (IsOffloadingHost)
540  CmdArgs.push_back("-lomptarget");
541 
542  addArchSpecificRPath(TC, Args, CmdArgs);
543 
544  return true;
545 }
546 
547 static void addSanitizerRuntime(const ToolChain &TC, const ArgList &Args,
548  ArgStringList &CmdArgs, StringRef Sanitizer,
549  bool IsShared, bool IsWhole) {
550  // Wrap any static runtimes that must be forced into executable in
551  // whole-archive.
552  if (IsWhole) CmdArgs.push_back("--whole-archive");
553  CmdArgs.push_back(TC.getCompilerRTArgString(
554  Args, Sanitizer, IsShared ? ToolChain::FT_Shared : ToolChain::FT_Static));
555  if (IsWhole) CmdArgs.push_back("--no-whole-archive");
556 
557  if (IsShared) {
558  addArchSpecificRPath(TC, Args, CmdArgs);
559  }
560 }
561 
562 // Tries to use a file with the list of dynamic symbols that need to be exported
563 // from the runtime library. Returns true if the file was found.
564 static bool addSanitizerDynamicList(const ToolChain &TC, const ArgList &Args,
565  ArgStringList &CmdArgs,
566  StringRef Sanitizer) {
567  // Solaris ld defaults to --export-dynamic behaviour but doesn't support
568  // the option, so don't try to pass it.
569  if (TC.getTriple().getOS() == llvm::Triple::Solaris)
570  return true;
571  // Myriad is static linking only. Furthermore, some versions of its
572  // linker have the bug where --export-dynamic overrides -static, so
573  // don't use --export-dynamic on that platform.
574  if (TC.getTriple().getVendor() == llvm::Triple::Myriad)
575  return true;
576  SmallString<128> SanRT(TC.getCompilerRT(Args, Sanitizer));
577  if (llvm::sys::fs::exists(SanRT + ".syms")) {
578  CmdArgs.push_back(Args.MakeArgString("--dynamic-list=" + SanRT + ".syms"));
579  return true;
580  }
581  return false;
582 }
583 
584 void tools::linkSanitizerRuntimeDeps(const ToolChain &TC,
585  ArgStringList &CmdArgs) {
586  // Force linking against the system libraries sanitizers depends on
587  // (see PR15823 why this is necessary).
588  CmdArgs.push_back("--no-as-needed");
589  // There's no libpthread or librt on RTEMS & Android.
590  if (TC.getTriple().getOS() != llvm::Triple::RTEMS &&
591  !TC.getTriple().isAndroid()) {
592  CmdArgs.push_back("-lpthread");
593  if (!TC.getTriple().isOSOpenBSD())
594  CmdArgs.push_back("-lrt");
595  }
596  CmdArgs.push_back("-lm");
597  // There's no libdl on all OSes.
598  if (!TC.getTriple().isOSFreeBSD() &&
599  !TC.getTriple().isOSNetBSD() &&
600  !TC.getTriple().isOSOpenBSD() &&
601  TC.getTriple().getOS() != llvm::Triple::RTEMS)
602  CmdArgs.push_back("-ldl");
603  // Required for backtrace on some OSes
604  if (TC.getTriple().isOSFreeBSD() ||
605  TC.getTriple().isOSNetBSD())
606  CmdArgs.push_back("-lexecinfo");
607 }
608 
609 static void
610 collectSanitizerRuntimes(const ToolChain &TC, const ArgList &Args,
611  SmallVectorImpl<StringRef> &SharedRuntimes,
612  SmallVectorImpl<StringRef> &StaticRuntimes,
613  SmallVectorImpl<StringRef> &NonWholeStaticRuntimes,
614  SmallVectorImpl<StringRef> &HelperStaticRuntimes,
615  SmallVectorImpl<StringRef> &RequiredSymbols) {
616  const SanitizerArgs &SanArgs = TC.getSanitizerArgs();
617  // Collect shared runtimes.
618  if (SanArgs.needsSharedRt()) {
619  if (SanArgs.needsAsanRt() && SanArgs.linkRuntimes()) {
620  SharedRuntimes.push_back("asan");
621  if (!Args.hasArg(options::OPT_shared) && !TC.getTriple().isAndroid())
622  HelperStaticRuntimes.push_back("asan-preinit");
623  }
624  if (SanArgs.needsUbsanRt() && SanArgs.linkRuntimes()) {
625  if (SanArgs.requiresMinimalRuntime())
626  SharedRuntimes.push_back("ubsan_minimal");
627  else
628  SharedRuntimes.push_back("ubsan_standalone");
629  }
630  if (SanArgs.needsScudoRt() && SanArgs.linkRuntimes()) {
631  if (SanArgs.requiresMinimalRuntime())
632  SharedRuntimes.push_back("scudo_minimal");
633  else
634  SharedRuntimes.push_back("scudo");
635  }
636  if (SanArgs.needsHwasanRt() && SanArgs.linkRuntimes())
637  SharedRuntimes.push_back("hwasan");
638  }
639 
640  // The stats_client library is also statically linked into DSOs.
641  if (SanArgs.needsStatsRt() && SanArgs.linkRuntimes())
642  StaticRuntimes.push_back("stats_client");
643 
644  // Collect static runtimes.
645  if (Args.hasArg(options::OPT_shared) || SanArgs.needsSharedRt()) {
646  // Don't link static runtimes into DSOs or if -shared-libasan.
647  return;
648  }
649  if (SanArgs.needsAsanRt() && SanArgs.linkRuntimes()) {
650  StaticRuntimes.push_back("asan");
651  if (SanArgs.linkCXXRuntimes())
652  StaticRuntimes.push_back("asan_cxx");
653  }
654 
655  if (SanArgs.needsHwasanRt() && SanArgs.linkRuntimes()) {
656  StaticRuntimes.push_back("hwasan");
657  if (SanArgs.linkCXXRuntimes())
658  StaticRuntimes.push_back("hwasan_cxx");
659  }
660  if (SanArgs.needsDfsanRt() && SanArgs.linkRuntimes())
661  StaticRuntimes.push_back("dfsan");
662  if (SanArgs.needsLsanRt() && SanArgs.linkRuntimes())
663  StaticRuntimes.push_back("lsan");
664  if (SanArgs.needsMsanRt() && SanArgs.linkRuntimes()) {
665  StaticRuntimes.push_back("msan");
666  if (SanArgs.linkCXXRuntimes())
667  StaticRuntimes.push_back("msan_cxx");
668  }
669  if (SanArgs.needsTsanRt() && SanArgs.linkRuntimes()) {
670  StaticRuntimes.push_back("tsan");
671  if (SanArgs.linkCXXRuntimes())
672  StaticRuntimes.push_back("tsan_cxx");
673  }
674  if (SanArgs.needsUbsanRt() && SanArgs.linkRuntimes()) {
675  if (SanArgs.requiresMinimalRuntime()) {
676  StaticRuntimes.push_back("ubsan_minimal");
677  } else {
678  StaticRuntimes.push_back("ubsan_standalone");
679  if (SanArgs.linkCXXRuntimes())
680  StaticRuntimes.push_back("ubsan_standalone_cxx");
681  }
682  }
683  if (SanArgs.needsSafeStackRt() && SanArgs.linkRuntimes()) {
684  NonWholeStaticRuntimes.push_back("safestack");
685  RequiredSymbols.push_back("__safestack_init");
686  }
687  if (SanArgs.needsCfiRt() && SanArgs.linkRuntimes())
688  StaticRuntimes.push_back("cfi");
689  if (SanArgs.needsCfiDiagRt() && SanArgs.linkRuntimes()) {
690  StaticRuntimes.push_back("cfi_diag");
691  if (SanArgs.linkCXXRuntimes())
692  StaticRuntimes.push_back("ubsan_standalone_cxx");
693  }
694  if (SanArgs.needsStatsRt() && SanArgs.linkRuntimes()) {
695  NonWholeStaticRuntimes.push_back("stats");
696  RequiredSymbols.push_back("__sanitizer_stats_register");
697  }
698  if (SanArgs.needsScudoRt() && SanArgs.linkRuntimes()) {
699  if (SanArgs.requiresMinimalRuntime()) {
700  StaticRuntimes.push_back("scudo_minimal");
701  if (SanArgs.linkCXXRuntimes())
702  StaticRuntimes.push_back("scudo_cxx_minimal");
703  } else {
704  StaticRuntimes.push_back("scudo");
705  if (SanArgs.linkCXXRuntimes())
706  StaticRuntimes.push_back("scudo_cxx");
707  }
708  }
709 }
710 
711 // Should be called before we add system libraries (C++ ABI, libstdc++/libc++,
712 // C runtime, etc). Returns true if sanitizer system deps need to be linked in.
713 bool tools::addSanitizerRuntimes(const ToolChain &TC, const ArgList &Args,
714  ArgStringList &CmdArgs) {
715  SmallVector<StringRef, 4> SharedRuntimes, StaticRuntimes,
716  NonWholeStaticRuntimes, HelperStaticRuntimes, RequiredSymbols;
717  collectSanitizerRuntimes(TC, Args, SharedRuntimes, StaticRuntimes,
718  NonWholeStaticRuntimes, HelperStaticRuntimes,
719  RequiredSymbols);
720 
721  const SanitizerArgs &SanArgs = TC.getSanitizerArgs();
722  // Inject libfuzzer dependencies.
723  if (SanArgs.needsFuzzer() && SanArgs.linkRuntimes() &&
724  !Args.hasArg(options::OPT_shared)) {
725 
726  addSanitizerRuntime(TC, Args, CmdArgs, "fuzzer", false, true);
727  if (!Args.hasArg(clang::driver::options::OPT_nostdlibxx))
728  TC.AddCXXStdlibLibArgs(Args, CmdArgs);
729  }
730 
731  for (auto RT : SharedRuntimes)
732  addSanitizerRuntime(TC, Args, CmdArgs, RT, true, false);
733  for (auto RT : HelperStaticRuntimes)
734  addSanitizerRuntime(TC, Args, CmdArgs, RT, false, true);
735  bool AddExportDynamic = false;
736  for (auto RT : StaticRuntimes) {
737  addSanitizerRuntime(TC, Args, CmdArgs, RT, false, true);
738  AddExportDynamic |= !addSanitizerDynamicList(TC, Args, CmdArgs, RT);
739  }
740  for (auto RT : NonWholeStaticRuntimes) {
741  addSanitizerRuntime(TC, Args, CmdArgs, RT, false, false);
742  AddExportDynamic |= !addSanitizerDynamicList(TC, Args, CmdArgs, RT);
743  }
744  for (auto S : RequiredSymbols) {
745  CmdArgs.push_back("-u");
746  CmdArgs.push_back(Args.MakeArgString(S));
747  }
748  // If there is a static runtime with no dynamic list, force all the symbols
749  // to be dynamic to be sure we export sanitizer interface functions.
750  if (AddExportDynamic)
751  CmdArgs.push_back("--export-dynamic");
752 
753  if (SanArgs.hasCrossDsoCfi() && !AddExportDynamic)
754  CmdArgs.push_back("-export-dynamic-symbol=__cfi_check");
755 
756  return !StaticRuntimes.empty() || !NonWholeStaticRuntimes.empty();
757 }
758 
759 bool tools::addXRayRuntime(const ToolChain&TC, const ArgList &Args, ArgStringList &CmdArgs) {
760  if (Args.hasArg(options::OPT_shared))
761  return false;
762 
763  if (TC.getXRayArgs().needsXRayRt()) {
764  CmdArgs.push_back("-whole-archive");
765  CmdArgs.push_back(TC.getCompilerRTArgString(Args, "xray"));
766  for (const auto &Mode : TC.getXRayArgs().modeList())
767  CmdArgs.push_back(TC.getCompilerRTArgString(Args, Mode));
768  CmdArgs.push_back("-no-whole-archive");
769  return true;
770  }
771 
772  return false;
773 }
774 
775 void tools::linkXRayRuntimeDeps(const ToolChain &TC, ArgStringList &CmdArgs) {
776  CmdArgs.push_back("--no-as-needed");
777  CmdArgs.push_back("-lpthread");
778  if (!TC.getTriple().isOSOpenBSD())
779  CmdArgs.push_back("-lrt");
780  CmdArgs.push_back("-lm");
781 
782  if (!TC.getTriple().isOSFreeBSD() &&
783  !TC.getTriple().isOSNetBSD() &&
784  !TC.getTriple().isOSOpenBSD())
785  CmdArgs.push_back("-ldl");
786 }
787 
788 bool tools::areOptimizationsEnabled(const ArgList &Args) {
789  // Find the last -O arg and see if it is non-zero.
790  if (Arg *A = Args.getLastArg(options::OPT_O_Group))
791  return !A->getOption().matches(options::OPT_O0);
792  // Defaults to -O0.
793  return false;
794 }
795 
796 const char *tools::SplitDebugName(const ArgList &Args, const InputInfo &Input,
797  const InputInfo &Output) {
798  if (Arg *A = Args.getLastArg(options::OPT_gsplit_dwarf_EQ))
799  if (StringRef(A->getValue()) == "single")
800  return Args.MakeArgString(Output.getFilename());
801 
802  Arg *FinalOutput = Args.getLastArg(options::OPT_o);
803  if (FinalOutput && Args.hasArg(options::OPT_c)) {
804  SmallString<128> T(FinalOutput->getValue());
805  llvm::sys::path::replace_extension(T, "dwo");
806  return Args.MakeArgString(T);
807  } else {
808  // Use the compilation dir.
810  Args.getLastArgValue(options::OPT_fdebug_compilation_dir));
811  SmallString<128> F(llvm::sys::path::stem(Input.getBaseInput()));
812  llvm::sys::path::replace_extension(F, "dwo");
813  T += F;
814  return Args.MakeArgString(F);
815  }
816 }
817 
818 void tools::SplitDebugInfo(const ToolChain &TC, Compilation &C, const Tool &T,
819  const JobAction &JA, const ArgList &Args,
820  const InputInfo &Output, const char *OutFile) {
821  ArgStringList ExtractArgs;
822  ExtractArgs.push_back("--extract-dwo");
823 
824  ArgStringList StripArgs;
825  StripArgs.push_back("--strip-dwo");
826 
827  // Grabbing the output of the earlier compile step.
828  StripArgs.push_back(Output.getFilename());
829  ExtractArgs.push_back(Output.getFilename());
830  ExtractArgs.push_back(OutFile);
831 
832  const char *Exec =
833  Args.MakeArgString(TC.GetProgramPath(CLANG_DEFAULT_OBJCOPY));
834  InputInfo II(types::TY_Object, Output.getFilename(), Output.getFilename());
835 
836  // First extract the dwo sections.
837  C.addCommand(std::make_unique<Command>(JA, T, Exec, ExtractArgs, II));
838 
839  // Then remove them from the original .o file.
840  C.addCommand(std::make_unique<Command>(JA, T, Exec, StripArgs, II));
841 }
842 
843 // Claim options we don't want to warn if they are unused. We do this for
844 // options that build systems might add but are unused when assembling or only
845 // running the preprocessor for example.
846 void tools::claimNoWarnArgs(const ArgList &Args) {
847  // Don't warn about unused -f(no-)?lto. This can happen when we're
848  // preprocessing, precompiling or assembling.
849  Args.ClaimAllArgs(options::OPT_flto_EQ);
850  Args.ClaimAllArgs(options::OPT_flto);
851  Args.ClaimAllArgs(options::OPT_fno_lto);
852 }
853 
854 Arg *tools::getLastProfileUseArg(const ArgList &Args) {
855  auto *ProfileUseArg = Args.getLastArg(
856  options::OPT_fprofile_instr_use, options::OPT_fprofile_instr_use_EQ,
857  options::OPT_fprofile_use, options::OPT_fprofile_use_EQ,
858  options::OPT_fno_profile_instr_use);
859 
860  if (ProfileUseArg &&
861  ProfileUseArg->getOption().matches(options::OPT_fno_profile_instr_use))
862  ProfileUseArg = nullptr;
863 
864  return ProfileUseArg;
865 }
866 
867 Arg *tools::getLastProfileSampleUseArg(const ArgList &Args) {
868  auto *ProfileSampleUseArg = Args.getLastArg(
869  options::OPT_fprofile_sample_use, options::OPT_fprofile_sample_use_EQ,
870  options::OPT_fauto_profile, options::OPT_fauto_profile_EQ,
871  options::OPT_fno_profile_sample_use, options::OPT_fno_auto_profile);
872 
873  if (ProfileSampleUseArg &&
874  (ProfileSampleUseArg->getOption().matches(
875  options::OPT_fno_profile_sample_use) ||
876  ProfileSampleUseArg->getOption().matches(options::OPT_fno_auto_profile)))
877  return nullptr;
878 
879  return Args.getLastArg(options::OPT_fprofile_sample_use_EQ,
880  options::OPT_fauto_profile_EQ);
881 }
882 
883 /// Parses the various -fpic/-fPIC/-fpie/-fPIE arguments. Then,
884 /// smooshes them together with platform defaults, to decide whether
885 /// this compile should be using PIC mode or not. Returns a tuple of
886 /// (RelocationModel, PICLevel, IsPIE).
887 std::tuple<llvm::Reloc::Model, unsigned, bool>
888 tools::ParsePICArgs(const ToolChain &ToolChain, const ArgList &Args) {
889  const llvm::Triple &EffectiveTriple = ToolChain.getEffectiveTriple();
890  const llvm::Triple &Triple = ToolChain.getTriple();
891 
892  bool PIE = ToolChain.isPIEDefault();
893  bool PIC = PIE || ToolChain.isPICDefault();
894  // The Darwin/MachO default to use PIC does not apply when using -static.
895  if (Triple.isOSBinFormatMachO() && Args.hasArg(options::OPT_static))
896  PIE = PIC = false;
897  bool IsPICLevelTwo = PIC;
898 
899  bool KernelOrKext =
900  Args.hasArg(options::OPT_mkernel, options::OPT_fapple_kext);
901 
902  // Android-specific defaults for PIC/PIE
903  if (Triple.isAndroid()) {
904  switch (Triple.getArch()) {
905  case llvm::Triple::arm:
906  case llvm::Triple::armeb:
907  case llvm::Triple::thumb:
908  case llvm::Triple::thumbeb:
909  case llvm::Triple::aarch64:
910  case llvm::Triple::mips:
911  case llvm::Triple::mipsel:
912  case llvm::Triple::mips64:
913  case llvm::Triple::mips64el:
914  PIC = true; // "-fpic"
915  break;
916 
917  case llvm::Triple::x86:
918  case llvm::Triple::x86_64:
919  PIC = true; // "-fPIC"
920  IsPICLevelTwo = true;
921  break;
922 
923  default:
924  break;
925  }
926  }
927 
928  // OpenBSD-specific defaults for PIE
929  if (Triple.isOSOpenBSD()) {
930  switch (ToolChain.getArch()) {
931  case llvm::Triple::arm:
932  case llvm::Triple::aarch64:
933  case llvm::Triple::mips64:
934  case llvm::Triple::mips64el:
935  case llvm::Triple::x86:
936  case llvm::Triple::x86_64:
937  IsPICLevelTwo = false; // "-fpie"
938  break;
939 
940  case llvm::Triple::ppc:
941  case llvm::Triple::sparc:
942  case llvm::Triple::sparcel:
943  case llvm::Triple::sparcv9:
944  IsPICLevelTwo = true; // "-fPIE"
945  break;
946 
947  default:
948  break;
949  }
950  }
951 
952  // AMDGPU-specific defaults for PIC.
953  if (Triple.getArch() == llvm::Triple::amdgcn)
954  PIC = true;
955 
956  // The last argument relating to either PIC or PIE wins, and no
957  // other argument is used. If the last argument is any flavor of the
958  // '-fno-...' arguments, both PIC and PIE are disabled. Any PIE
959  // option implicitly enables PIC at the same level.
960  Arg *LastPICArg = Args.getLastArg(options::OPT_fPIC, options::OPT_fno_PIC,
961  options::OPT_fpic, options::OPT_fno_pic,
962  options::OPT_fPIE, options::OPT_fno_PIE,
963  options::OPT_fpie, options::OPT_fno_pie);
964  if (Triple.isOSWindows() && LastPICArg &&
965  LastPICArg ==
966  Args.getLastArg(options::OPT_fPIC, options::OPT_fpic,
967  options::OPT_fPIE, options::OPT_fpie)) {
968  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
969  << LastPICArg->getSpelling() << Triple.str();
970  if (Triple.getArch() == llvm::Triple::x86_64)
971  return std::make_tuple(llvm::Reloc::PIC_, 2U, false);
972  return std::make_tuple(llvm::Reloc::Static, 0U, false);
973  }
974 
975  // Check whether the tool chain trumps the PIC-ness decision. If the PIC-ness
976  // is forced, then neither PIC nor PIE flags will have no effect.
977  if (!ToolChain.isPICDefaultForced()) {
978  if (LastPICArg) {
979  Option O = LastPICArg->getOption();
980  if (O.matches(options::OPT_fPIC) || O.matches(options::OPT_fpic) ||
981  O.matches(options::OPT_fPIE) || O.matches(options::OPT_fpie)) {
982  PIE = O.matches(options::OPT_fPIE) || O.matches(options::OPT_fpie);
983  PIC =
984  PIE || O.matches(options::OPT_fPIC) || O.matches(options::OPT_fpic);
985  IsPICLevelTwo =
986  O.matches(options::OPT_fPIE) || O.matches(options::OPT_fPIC);
987  } else {
988  PIE = PIC = false;
989  if (EffectiveTriple.isPS4CPU()) {
990  Arg *ModelArg = Args.getLastArg(options::OPT_mcmodel_EQ);
991  StringRef Model = ModelArg ? ModelArg->getValue() : "";
992  if (Model != "kernel") {
993  PIC = true;
994  ToolChain.getDriver().Diag(diag::warn_drv_ps4_force_pic)
995  << LastPICArg->getSpelling();
996  }
997  }
998  }
999  }
1000  }
1001 
1002  // Introduce a Darwin and PS4-specific hack. If the default is PIC, but the
1003  // PIC level would've been set to level 1, force it back to level 2 PIC
1004  // instead.
1005  if (PIC && (Triple.isOSDarwin() || EffectiveTriple.isPS4CPU()))
1006  IsPICLevelTwo |= ToolChain.isPICDefault();
1007 
1008  // This kernel flags are a trump-card: they will disable PIC/PIE
1009  // generation, independent of the argument order.
1010  if (KernelOrKext &&
1011  ((!EffectiveTriple.isiOS() || EffectiveTriple.isOSVersionLT(6)) &&
1012  !EffectiveTriple.isWatchOS()))
1013  PIC = PIE = false;
1014 
1015  if (Arg *A = Args.getLastArg(options::OPT_mdynamic_no_pic)) {
1016  // This is a very special mode. It trumps the other modes, almost no one
1017  // uses it, and it isn't even valid on any OS but Darwin.
1018  if (!Triple.isOSDarwin())
1019  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
1020  << A->getSpelling() << Triple.str();
1021 
1022  // FIXME: Warn when this flag trumps some other PIC or PIE flag.
1023 
1024  // Only a forced PIC mode can cause the actual compile to have PIC defines
1025  // etc., no flags are sufficient. This behavior was selected to closely
1026  // match that of llvm-gcc and Apple GCC before that.
1027  PIC = ToolChain.isPICDefault() && ToolChain.isPICDefaultForced();
1028 
1029  return std::make_tuple(llvm::Reloc::DynamicNoPIC, PIC ? 2U : 0U, false);
1030  }
1031 
1032  bool EmbeddedPISupported;
1033  switch (Triple.getArch()) {
1034  case llvm::Triple::arm:
1035  case llvm::Triple::armeb:
1036  case llvm::Triple::thumb:
1037  case llvm::Triple::thumbeb:
1038  EmbeddedPISupported = true;
1039  break;
1040  default:
1041  EmbeddedPISupported = false;
1042  break;
1043  }
1044 
1045  bool ROPI = false, RWPI = false;
1046  Arg* LastROPIArg = Args.getLastArg(options::OPT_fropi, options::OPT_fno_ropi);
1047  if (LastROPIArg && LastROPIArg->getOption().matches(options::OPT_fropi)) {
1048  if (!EmbeddedPISupported)
1049  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
1050  << LastROPIArg->getSpelling() << Triple.str();
1051  ROPI = true;
1052  }
1053  Arg *LastRWPIArg = Args.getLastArg(options::OPT_frwpi, options::OPT_fno_rwpi);
1054  if (LastRWPIArg && LastRWPIArg->getOption().matches(options::OPT_frwpi)) {
1055  if (!EmbeddedPISupported)
1056  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
1057  << LastRWPIArg->getSpelling() << Triple.str();
1058  RWPI = true;
1059  }
1060 
1061  // ROPI and RWPI are not compatible with PIC or PIE.
1062  if ((ROPI || RWPI) && (PIC || PIE))
1063  ToolChain.getDriver().Diag(diag::err_drv_ropi_rwpi_incompatible_with_pic);
1064 
1065  if (Triple.isMIPS()) {
1066  StringRef CPUName;
1067  StringRef ABIName;
1068  mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName);
1069  // When targeting the N64 ABI, PIC is the default, except in the case
1070  // when the -mno-abicalls option is used. In that case we exit
1071  // at next check regardless of PIC being set below.
1072  if (ABIName == "n64")
1073  PIC = true;
1074  // When targettng MIPS with -mno-abicalls, it's always static.
1075  if(Args.hasArg(options::OPT_mno_abicalls))
1076  return std::make_tuple(llvm::Reloc::Static, 0U, false);
1077  // Unlike other architectures, MIPS, even with -fPIC/-mxgot/multigot,
1078  // does not use PIC level 2 for historical reasons.
1079  IsPICLevelTwo = false;
1080  }
1081 
1082  if (PIC)
1083  return std::make_tuple(llvm::Reloc::PIC_, IsPICLevelTwo ? 2U : 1U, PIE);
1084 
1085  llvm::Reloc::Model RelocM = llvm::Reloc::Static;
1086  if (ROPI && RWPI)
1087  RelocM = llvm::Reloc::ROPI_RWPI;
1088  else if (ROPI)
1089  RelocM = llvm::Reloc::ROPI;
1090  else if (RWPI)
1091  RelocM = llvm::Reloc::RWPI;
1092 
1093  return std::make_tuple(RelocM, 0U, false);
1094 }
1095 
1096 // `-falign-functions` indicates that the functions should be aligned to a
1097 // 16-byte boundary.
1098 //
1099 // `-falign-functions=1` is the same as `-fno-align-functions`.
1100 //
1101 // The scalar `n` in `-falign-functions=n` must be an integral value between
1102 // [0, 65536]. If the value is not a power-of-two, it will be rounded up to
1103 // the nearest power-of-two.
1104 //
1105 // If we return `0`, the frontend will default to the backend's preferred
1106 // alignment.
1107 //
1108 // NOTE: icc only allows values between [0, 4096]. icc uses `-falign-functions`
1109 // to mean `-falign-functions=16`. GCC defaults to the backend's preferred
1110 // alignment. For unaligned functions, we default to the backend's preferred
1111 // alignment.
1112 unsigned tools::ParseFunctionAlignment(const ToolChain &TC,
1113  const ArgList &Args) {
1114  const Arg *A = Args.getLastArg(options::OPT_falign_functions,
1115  options::OPT_falign_functions_EQ,
1116  options::OPT_fno_align_functions);
1117  if (!A || A->getOption().matches(options::OPT_fno_align_functions))
1118  return 0;
1119 
1120  if (A->getOption().matches(options::OPT_falign_functions))
1121  return 0;
1122 
1123  unsigned Value = 0;
1124  if (StringRef(A->getValue()).getAsInteger(10, Value) || Value > 65536)
1125  TC.getDriver().Diag(diag::err_drv_invalid_int_value)
1126  << A->getAsString(Args) << A->getValue();
1127  return Value ? llvm::Log2_32_Ceil(std::min(Value, 65536u)) : Value;
1128 }
1129 
1130 unsigned tools::ParseDebugDefaultVersion(const ToolChain &TC,
1131  const ArgList &Args) {
1132  const Arg *A = Args.getLastArg(options::OPT_fdebug_default_version);
1133 
1134  if (!A)
1135  return 0;
1136 
1137  unsigned Value = 0;
1138  if (StringRef(A->getValue()).getAsInteger(10, Value) || Value > 5 ||
1139  Value < 2)
1140  TC.getDriver().Diag(diag::err_drv_invalid_int_value)
1141  << A->getAsString(Args) << A->getValue();
1142  return Value;
1143 }
1144 
1145 void tools::AddAssemblerKPIC(const ToolChain &ToolChain, const ArgList &Args,
1146  ArgStringList &CmdArgs) {
1147  llvm::Reloc::Model RelocationModel;
1148  unsigned PICLevel;
1149  bool IsPIE;
1150  std::tie(RelocationModel, PICLevel, IsPIE) = ParsePICArgs(ToolChain, Args);
1151 
1152  if (RelocationModel != llvm::Reloc::Static)
1153  CmdArgs.push_back("-KPIC");
1154 }
1155 
1156 /// Determine whether Objective-C automated reference counting is
1157 /// enabled.
1158 bool tools::isObjCAutoRefCount(const ArgList &Args) {
1159  return Args.hasFlag(options::OPT_fobjc_arc, options::OPT_fno_objc_arc, false);
1160 }
1161 
1163 
1164 static LibGccType getLibGccType(const Driver &D, const ArgList &Args) {
1165  if (Args.hasArg(options::OPT_static_libgcc) ||
1166  Args.hasArg(options::OPT_static) || Args.hasArg(options::OPT_static_pie))
1167  return LibGccType::StaticLibGcc;
1168  if (Args.hasArg(options::OPT_shared_libgcc) || D.CCCIsCXX())
1169  return LibGccType::SharedLibGcc;
1171 }
1172 
1173 // Gcc adds libgcc arguments in various ways:
1174 //
1175 // gcc <none>: -lgcc --as-needed -lgcc_s --no-as-needed
1176 // g++ <none>: -lgcc_s -lgcc
1177 // gcc shared: -lgcc_s -lgcc
1178 // g++ shared: -lgcc_s -lgcc
1179 // gcc static: -lgcc -lgcc_eh
1180 // g++ static: -lgcc -lgcc_eh
1181 // gcc static-pie: -lgcc -lgcc_eh
1182 // g++ static-pie: -lgcc -lgcc_eh
1183 //
1184 // Also, certain targets need additional adjustments.
1185 
1186 static void AddUnwindLibrary(const ToolChain &TC, const Driver &D,
1187  ArgStringList &CmdArgs, const ArgList &Args) {
1189  // Targets that don't use unwind libraries.
1190  if (TC.getTriple().isAndroid() || TC.getTriple().isOSIAMCU() ||
1191  TC.getTriple().isOSBinFormatWasm() ||
1192  UNW == ToolChain::UNW_None)
1193  return;
1194 
1195  LibGccType LGT = getLibGccType(D, Args);
1196  bool AsNeeded = LGT == LibGccType::UnspecifiedLibGcc &&
1197  !TC.getTriple().isAndroid() && !TC.getTriple().isOSCygMing();
1198  if (AsNeeded)
1199  CmdArgs.push_back("--as-needed");
1200 
1201  switch (UNW) {
1202  case ToolChain::UNW_None:
1203  return;
1204  case ToolChain::UNW_Libgcc: {
1205  if (LGT == LibGccType::StaticLibGcc)
1206  CmdArgs.push_back("-lgcc_eh");
1207  else
1208  CmdArgs.push_back("-lgcc_s");
1209  break;
1210  }
1212  if (LGT == LibGccType::StaticLibGcc)
1213  CmdArgs.push_back("-l:libunwind.a");
1214  else
1215  CmdArgs.push_back("-l:libunwind.so");
1216  break;
1217  }
1218 
1219  if (AsNeeded)
1220  CmdArgs.push_back("--no-as-needed");
1221 }
1222 
1223 static void AddLibgcc(const ToolChain &TC, const Driver &D,
1224  ArgStringList &CmdArgs, const ArgList &Args) {
1225  LibGccType LGT = getLibGccType(D, Args);
1226  if (LGT != LibGccType::SharedLibGcc)
1227  CmdArgs.push_back("-lgcc");
1228  AddUnwindLibrary(TC, D, CmdArgs, Args);
1229  if (LGT == LibGccType::SharedLibGcc)
1230  CmdArgs.push_back("-lgcc");
1231 
1232  // According to Android ABI, we have to link with libdl if we are
1233  // linking with non-static libgcc.
1234  //
1235  // NOTE: This fixes a link error on Android MIPS as well. The non-static
1236  // libgcc for MIPS relies on _Unwind_Find_FDE and dl_iterate_phdr from libdl.
1237  if (TC.getTriple().isAndroid() && LGT != LibGccType::StaticLibGcc)
1238  CmdArgs.push_back("-ldl");
1239 }
1240 
1241 void tools::AddRunTimeLibs(const ToolChain &TC, const Driver &D,
1242  ArgStringList &CmdArgs, const ArgList &Args) {
1243  // Make use of compiler-rt if --rtlib option is used
1245 
1246  switch (RLT) {
1248  CmdArgs.push_back(TC.getCompilerRTArgString(Args, "builtins"));
1249  AddUnwindLibrary(TC, D, CmdArgs, Args);
1250  break;
1251  case ToolChain::RLT_Libgcc:
1252  // Make sure libgcc is not used under MSVC environment by default
1253  if (TC.getTriple().isKnownWindowsMSVCEnvironment()) {
1254  // Issue error diagnostic if libgcc is explicitly specified
1255  // through command line as --rtlib option argument.
1256  if (Args.hasArg(options::OPT_rtlib_EQ)) {
1257  TC.getDriver().Diag(diag::err_drv_unsupported_rtlib_for_platform)
1258  << Args.getLastArg(options::OPT_rtlib_EQ)->getValue() << "MSVC";
1259  }
1260  } else
1261  AddLibgcc(TC, D, CmdArgs, Args);
1262  break;
1263  }
1264 }
1265 
1266 /// Add HIP linker script arguments at the end of the argument list so that
1267 /// the fat binary is built by embedding the device images into the host. The
1268 /// linker script also defines a symbol required by the code generation so that
1269 /// the image can be retrieved at runtime. This should be used only in tool
1270 /// chains that support linker scripts.
1271 void tools::AddHIPLinkerScript(const ToolChain &TC, Compilation &C,
1272  const InputInfo &Output,
1273  const InputInfoList &Inputs, const ArgList &Args,
1274  ArgStringList &CmdArgs, const JobAction &JA,
1275  const Tool &T) {
1276 
1277  // If this is not a HIP host toolchain, we don't need to do anything.
1279  return;
1280 
1281  InputInfoList DeviceInputs;
1282  for (const auto &II : Inputs) {
1283  const Action *A = II.getAction();
1284  // Is this a device linking action?
1285  if (A && isa<LinkJobAction>(A) && A->isDeviceOffloading(Action::OFK_HIP)) {
1286  DeviceInputs.push_back(II);
1287  }
1288  }
1289 
1290  if (DeviceInputs.empty())
1291  return;
1292 
1293  // Create temporary linker script. Keep it if save-temps is enabled.
1294  const char *LKS;
1295  std::string Name = llvm::sys::path::filename(Output.getFilename());
1296  if (C.getDriver().isSaveTempsEnabled()) {
1297  LKS = C.getArgs().MakeArgString(Name + ".lk");
1298  } else {
1299  auto TmpName = C.getDriver().GetTemporaryPath(Name, "lk");
1300  LKS = C.addTempFile(C.getArgs().MakeArgString(TmpName));
1301  }
1302 
1303  // Add linker script option to the command.
1304  CmdArgs.push_back("-T");
1305  CmdArgs.push_back(LKS);
1306 
1307  // Create a buffer to write the contents of the linker script.
1308  std::string LksBuffer;
1309  llvm::raw_string_ostream LksStream(LksBuffer);
1310 
1311  // Get the HIP offload tool chain.
1312  auto *HIPTC = static_cast<const toolchains::CudaToolChain *>(
1314  assert(HIPTC->getTriple().getArch() == llvm::Triple::amdgcn &&
1315  "Wrong platform");
1316  (void)HIPTC;
1317 
1318  const char *BundleFile;
1319  if (C.getDriver().isSaveTempsEnabled()) {
1320  BundleFile = C.getArgs().MakeArgString(Name + ".hipfb");
1321  } else {
1322  auto TmpName = C.getDriver().GetTemporaryPath(Name, "hipfb");
1323  BundleFile = C.addTempFile(C.getArgs().MakeArgString(TmpName));
1324  }
1325  AMDGCN::constructHIPFatbinCommand(C, JA, BundleFile, DeviceInputs, Args, T);
1326 
1327  // Add commands to embed target binaries. We ensure that each section and
1328  // image is 16-byte aligned. This is not mandatory, but increases the
1329  // likelihood of data to be aligned with a cache block in several main host
1330  // machines.
1331  LksStream << "/*\n";
1332  LksStream << " HIP Offload Linker Script\n";
1333  LksStream << " *** Automatically generated by Clang ***\n";
1334  LksStream << "*/\n";
1335  LksStream << "TARGET(binary)\n";
1336  LksStream << "INPUT(" << BundleFile << ")\n";
1337  LksStream << "SECTIONS\n";
1338  LksStream << "{\n";
1339  LksStream << " .hip_fatbin :\n";
1340  LksStream << " ALIGN(0x10)\n";
1341  LksStream << " {\n";
1342  LksStream << " PROVIDE_HIDDEN(__hip_fatbin = .);\n";
1343  LksStream << " " << BundleFile << "\n";
1344  LksStream << " }\n";
1345  LksStream << " /DISCARD/ :\n";
1346  LksStream << " {\n";
1347  LksStream << " * ( __CLANG_OFFLOAD_BUNDLE__* )\n";
1348  LksStream << " }\n";
1349  LksStream << "}\n";
1350  LksStream << "INSERT BEFORE .data\n";
1351  LksStream.flush();
1352 
1353  // Dump the contents of the linker script if the user requested that. We
1354  // support this option to enable testing of behavior with -###.
1355  if (C.getArgs().hasArg(options::OPT_fhip_dump_offload_linker_script))
1356  llvm::errs() << LksBuffer;
1357 
1358  // If this is a dry run, do not create the linker script file.
1359  if (C.getArgs().hasArg(options::OPT__HASH_HASH_HASH))
1360  return;
1361 
1362  // Open script file and write the contents.
1363  std::error_code EC;
1364  llvm::raw_fd_ostream Lksf(LKS, EC, llvm::sys::fs::OF_None);
1365 
1366  if (EC) {
1367  C.getDriver().Diag(clang::diag::err_unable_to_make_temp) << EC.message();
1368  return;
1369  }
1370 
1371  Lksf << LksBuffer;
1372 }
1373 
1374 SmallString<128> tools::getStatsFileName(const llvm::opt::ArgList &Args,
1375  const InputInfo &Output,
1376  const InputInfo &Input,
1377  const Driver &D) {
1378  const Arg *A = Args.getLastArg(options::OPT_save_stats_EQ);
1379  if (!A)
1380  return {};
1381 
1382  StringRef SaveStats = A->getValue();
1383  SmallString<128> StatsFile;
1384  if (SaveStats == "obj" && Output.isFilename()) {
1385  StatsFile.assign(Output.getFilename());
1386  llvm::sys::path::remove_filename(StatsFile);
1387  } else if (SaveStats != "cwd") {
1388  D.Diag(diag::err_drv_invalid_value) << A->getAsString(Args) << SaveStats;
1389  return {};
1390  }
1391 
1392  StringRef BaseName = llvm::sys::path::filename(Input.getBaseInput());
1393  llvm::sys::path::append(StatsFile, BaseName);
1394  llvm::sys::path::replace_extension(StatsFile, "stats");
1395  return StatsFile;
1396 }
1397 
1398 void tools::addMultilibFlag(bool Enabled, const char *const Flag,
1399  Multilib::flags_list &Flags) {
1400  Flags.push_back(std::string(Enabled ? "+" : "-") + Flag);
1401 }
void handleTargetFeaturesGroup(const llvm::opt::ArgList &Args, std::vector< StringRef > &Features, llvm::opt::OptSpecifier Group)
bool addXRayRuntime(const ToolChain &TC, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs)
OpenMPRuntimeKind getOpenMPRuntime(const llvm::opt::ArgList &Args) const
Compute the desired OpenMP runtime from the flags provided.
Definition: Driver.cpp:581
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:913
std::string getAArch64TargetCPU(const llvm::opt::ArgList &Args, const llvm::Triple &Triple, llvm::opt::Arg *&A)
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:4749
bool isUseSeparateSections(const llvm::Triple &Triple)
Definition: CommonArgs.cpp:352
Defines types useful for describing an Objective-C runtime.
const XRayArgs & getXRayArgs() const
Definition: ToolChain.cpp:123
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:203
DiagnosticBuilder Diag(unsigned DiagID) const
Definition: Driver.h:109
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:547
bool addOpenMPRuntime(llvm::opt::ArgStringList &CmdArgs, const ToolChain &TC, const llvm::opt::ArgList &Args, bool ForceStaticHostRuntime=false, bool IsOffloadingHost=false, bool GompNeedsRT=false)
Returns true, if an OpenMP runtime has been added.
std::string getCPUName(const llvm::opt::ArgList &Args, const llvm::Triple &T, bool FromAs=false)
const char * getFilename() const
Definition: InputInfo.h:83
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:120
void AddGoldPlugin(const ToolChain &ToolChain, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs, const InputInfo &Output, const InputInfo &Input, bool IsThinLTO)
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:564
void addMultilibFlag(bool Enabled, const char *const Flag, Multilib::flags_list &Flags)
Flag must be a flag accepted by the driver with its leading &#39;-&#39; removed,
std::string getSystemZTargetCPU(const llvm::opt::ArgList &Args)
Action - Represent an abstract compilation step to perform.
Definition: Action.h:47
std::string getTripleString() const
Definition: ToolChain.h:224
InputInfo - Wrapper for information about an input source.
Definition: InputInfo.h:22
void addArchSpecificRPath(const ToolChain &TC, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs)
bool isDeviceOffloading(OffloadKind OKind) const
Definition: Action.h:206
The LLVM OpenMP runtime.
Definition: Driver.h:95
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:91
bool needsXRayRt() const
Definition: XRayArgs.h:40
static LibGccType getLibGccType(const Driver &D, const ArgList &Args)
const char * SplitDebugName(const llvm::opt::ArgList &Args, const InputInfo &Input, const InputInfo &Output)
static void AddLibgcc(const ToolChain &TC, const Driver &D, ArgStringList &CmdArgs, const ArgList &Args)
llvm::vfs::FileSystem & getVFS() const
Definition: Driver.h:319
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:41
void constructHIPFatbinCommand(Compilation &C, const JobAction &JA, StringRef OutputFileName, const InputInfoList &Inputs, const llvm::opt::ArgList &TCArgs, const Tool &T)
Definition: HIP.cpp:201
bool requiresMinimalRuntime() const
Definition: SanitizerArgs.h:76
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:229
virtual bool isPICDefault() const =0
Test whether this toolchain defaults to PIC.
static void AddUnwindLibrary(const ToolChain &TC, const Driver &D, ArgStringList &CmdArgs, const ArgList &Args)
const llvm::Triple & getEffectiveTriple() const
Get the toolchain&#39;s effective clang triple.
Definition: ToolChain.h:229
Defines version macros and version-related utility functions for Clang.
static const StringRef GetTargetCPUVersion(const llvm::opt::ArgList &Args)
Definition: Hexagon.cpp:580
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.
std::vector< std::string > flags_list
Definition: Multilib.h:30
void addCommand(std::unique_ptr< Command > C)
Definition: Compilation.h:205
virtual UnwindLibType GetUnwindLibType(const llvm::opt::ArgList &Args) const
Definition: ToolChain.cpp:774
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)
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:215
LibGccType
virtual std::string getCompilerRT(const llvm::opt::ArgList &Args, StringRef Component, FileType Type=ToolChain::FT_Static) const
Definition: ToolChain.cpp:391
const llvm::opt::DerivedArgList & getArgs() const
Definition: Compilation.h:186
const Driver & getDriver() const
Definition: ToolChain.h:199
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:105
bool CCCIsCXX() const
Whether the driver should follow g++ like behavior.
Definition: Driver.h:173
bool isSaveTempsEnabled() const
Definition: Driver.h:347
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:564
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:755
llvm::vfs::FileSystem & getVFS() const
Definition: ToolChain.cpp:99
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:33
The GNU OpenMP runtime.
Definition: Driver.h:100
const SanitizerArgs & getSanitizerArgs() const
Definition: ToolChain.cpp:117
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:221
void claimNoWarnArgs(const llvm::opt::ArgList &Args)
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:45
const Driver & getDriver() const
Definition: Compilation.h:133
const llvm::Triple & getTriple() const
Definition: ToolChain.h:201
std::string getArchSpecificLibPath() const
Definition: ToolChain.cpp:472
const char * getCompilerRTArgString(const llvm::opt::ArgList &Args, StringRef Component, FileType Type=ToolChain::FT_Static) const
Definition: ToolChain.cpp:429
std::string GetProgramPath(const char *Name) const
Definition: ToolChain.cpp:516
const char * getBaseInput() const
Definition: InputInfo.h:78
static std::string getR600TargetGPU(const ArgList &Args)
Get the (LLVM) name of the R600 gpu we are targeting.
Definition: CommonArgs.cpp:205
unsigned ParseDebugDefaultVersion(const ToolChain &TC, const llvm::opt::ArgList &Args)
void addPathIfExists(const Driver &D, const Twine &Path, ToolChain::path_list &Paths)
Definition: CommonArgs.cpp:61
bool isFilename() const
Definition: InputInfo.h:75
virtual bool isCrossCompiling() const
Returns true if the toolchain is targeting a non-native architecture.
Definition: ToolChain.cpp:568
__DEVICE__ int min(int __a, int __b)
const char * addTempFile(const char *Name)
addTempFile - Add a file to remove on exit, and returns its argument.
Definition: Compilation.h:232
const ToolChain * getSingleOffloadToolChain() const
Return an offload toolchain of the provided kind.
Definition: Compilation.h:163
void getMipsCPUAndABI(const llvm::opt::ArgList &Args, const llvm::Triple &Triple, StringRef &CPUName, StringRef &ABIName)
bool isLLVMIR(ID Id)
Is this LLVM IR.
Definition: Types.cpp:178
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:610
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:889
ToolChain - Access to tools for a single platform.
Definition: ToolChain.h:88