clang  8.0.0svn
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 "HIP.h"
18 #include "Hexagon.h"
19 #include "InputInfo.h"
20 #include "clang/Basic/CharInfo.h"
23 #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/VirtualFileSystem.h"
55 #include "llvm/Support/YAMLParser.h"
56 
57 using namespace clang::driver;
58 using namespace clang::driver::tools;
59 using namespace clang;
60 using namespace llvm::opt;
61 
62 void tools::addPathIfExists(const Driver &D, const Twine &Path,
63  ToolChain::path_list &Paths) {
64  if (D.getVFS().exists(Path))
65  Paths.push_back(Path.str());
66 }
67 
68 void tools::handleTargetFeaturesGroup(const ArgList &Args,
69  std::vector<StringRef> &Features,
70  OptSpecifier Group) {
71  for (const Arg *A : Args.filtered(Group)) {
72  StringRef Name = A->getOption().getName();
73  A->claim();
74 
75  // Skip over "-m".
76  assert(Name.startswith("m") && "Invalid feature name.");
77  Name = Name.substr(1);
78 
79  bool IsNegative = Name.startswith("no-");
80  if (IsNegative)
81  Name = Name.substr(3);
82  Features.push_back(Args.MakeArgString((IsNegative ? "-" : "+") + Name));
83  }
84 }
85 
86 void tools::addDirectoryList(const ArgList &Args, ArgStringList &CmdArgs,
87  const char *ArgName, const char *EnvVar) {
88  const char *DirList = ::getenv(EnvVar);
89  bool CombinedArg = false;
90 
91  if (!DirList)
92  return; // Nothing to do.
93 
94  StringRef Name(ArgName);
95  if (Name.equals("-I") || Name.equals("-L"))
96  CombinedArg = true;
97 
98  StringRef Dirs(DirList);
99  if (Dirs.empty()) // Empty string should not add '.'.
100  return;
101 
102  StringRef::size_type Delim;
103  while ((Delim = Dirs.find(llvm::sys::EnvPathSeparator)) != StringRef::npos) {
104  if (Delim == 0) { // Leading colon.
105  if (CombinedArg) {
106  CmdArgs.push_back(Args.MakeArgString(std::string(ArgName) + "."));
107  } else {
108  CmdArgs.push_back(ArgName);
109  CmdArgs.push_back(".");
110  }
111  } else {
112  if (CombinedArg) {
113  CmdArgs.push_back(
114  Args.MakeArgString(std::string(ArgName) + Dirs.substr(0, Delim)));
115  } else {
116  CmdArgs.push_back(ArgName);
117  CmdArgs.push_back(Args.MakeArgString(Dirs.substr(0, Delim)));
118  }
119  }
120  Dirs = Dirs.substr(Delim + 1);
121  }
122 
123  if (Dirs.empty()) { // Trailing colon.
124  if (CombinedArg) {
125  CmdArgs.push_back(Args.MakeArgString(std::string(ArgName) + "."));
126  } else {
127  CmdArgs.push_back(ArgName);
128  CmdArgs.push_back(".");
129  }
130  } else { // Add the last path.
131  if (CombinedArg) {
132  CmdArgs.push_back(Args.MakeArgString(std::string(ArgName) + Dirs));
133  } else {
134  CmdArgs.push_back(ArgName);
135  CmdArgs.push_back(Args.MakeArgString(Dirs));
136  }
137  }
138 }
139 
140 void tools::AddLinkerInputs(const ToolChain &TC, const InputInfoList &Inputs,
141  const ArgList &Args, ArgStringList &CmdArgs,
142  const JobAction &JA) {
143  const Driver &D = TC.getDriver();
144 
145  // Add extra linker input arguments which are not treated as inputs
146  // (constructed via -Xarch_).
147  Args.AddAllArgValues(CmdArgs, options::OPT_Zlinker_input);
148 
149  for (const auto &II : Inputs) {
150  // If the current tool chain refers to an OpenMP or HIP offloading host, we
151  // should ignore inputs that refer to OpenMP or HIP offloading devices -
152  // they will be embedded according to a proper linker script.
153  if (auto *IA = II.getAction())
155  IA->isDeviceOffloading(Action::OFK_OpenMP)) ||
157  IA->isDeviceOffloading(Action::OFK_HIP)))
158  continue;
159 
160  if (!TC.HasNativeLLVMSupport() && types::isLLVMIR(II.getType()))
161  // Don't try to pass LLVM inputs unless we have native support.
162  D.Diag(diag::err_drv_no_linker_llvm_support) << TC.getTripleString();
163 
164  // Add filenames immediately.
165  if (II.isFilename()) {
166  CmdArgs.push_back(II.getFilename());
167  continue;
168  }
169 
170  // Otherwise, this is a linker input argument.
171  const Arg &A = II.getInputArg();
172 
173  // Handle reserved library options.
174  if (A.getOption().matches(options::OPT_Z_reserved_lib_stdcxx))
175  TC.AddCXXStdlibLibArgs(Args, CmdArgs);
176  else if (A.getOption().matches(options::OPT_Z_reserved_lib_cckext))
177  TC.AddCCKextLibArgs(Args, CmdArgs);
178  else if (A.getOption().matches(options::OPT_z)) {
179  // Pass -z prefix for gcc linker compatibility.
180  A.claim();
181  A.render(Args, CmdArgs);
182  } else {
183  A.renderAsInput(Args, CmdArgs);
184  }
185  }
186 
187  // LIBRARY_PATH - included following the user specified library paths.
188  // and only supported on native toolchains.
189  if (!TC.isCrossCompiling()) {
190  addDirectoryList(Args, CmdArgs, "-L", "LIBRARY_PATH");
191  }
192 }
193 
194 void tools::AddTargetFeature(const ArgList &Args,
195  std::vector<StringRef> &Features,
196  OptSpecifier OnOpt, OptSpecifier OffOpt,
197  StringRef FeatureName) {
198  if (Arg *A = Args.getLastArg(OnOpt, OffOpt)) {
199  if (A->getOption().matches(OnOpt))
200  Features.push_back(Args.MakeArgString("+" + FeatureName));
201  else
202  Features.push_back(Args.MakeArgString("-" + FeatureName));
203  }
204 }
205 
206 /// Get the (LLVM) name of the R600 gpu we are targeting.
207 static std::string getR600TargetGPU(const ArgList &Args) {
208  if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
209  const char *GPUName = A->getValue();
210  return llvm::StringSwitch<const char *>(GPUName)
211  .Cases("rv630", "rv635", "r600")
212  .Cases("rv610", "rv620", "rs780", "rs880")
213  .Case("rv740", "rv770")
214  .Case("palm", "cedar")
215  .Cases("sumo", "sumo2", "sumo")
216  .Case("hemlock", "cypress")
217  .Case("aruba", "cayman")
218  .Default(GPUName);
219  }
220  return "";
221 }
222 
223 static std::string getNios2TargetCPU(const ArgList &Args) {
224  Arg *A = Args.getLastArg(options::OPT_mcpu_EQ);
225  if (!A)
226  A = Args.getLastArg(options::OPT_march_EQ);
227 
228  if (!A)
229  return "";
230 
231  const char *name = A->getValue();
232  return llvm::StringSwitch<const char *>(name)
233  .Case("r1", "nios2r1")
234  .Case("r2", "nios2r2")
235  .Default(name);
236 }
237 
238 static std::string getLanaiTargetCPU(const ArgList &Args) {
239  if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
240  return A->getValue();
241  }
242  return "";
243 }
244 
245 /// Get the (LLVM) name of the WebAssembly cpu we are targeting.
246 static StringRef getWebAssemblyTargetCPU(const ArgList &Args) {
247  // If we have -mcpu=, use that.
248  if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
249  StringRef CPU = A->getValue();
250 
251 #ifdef __wasm__
252  // Handle "native" by examining the host. "native" isn't meaningful when
253  // cross compiling, so only support this when the host is also WebAssembly.
254  if (CPU == "native")
255  return llvm::sys::getHostCPUName();
256 #endif
257 
258  return CPU;
259  }
260 
261  return "generic";
262 }
263 
264 std::string tools::getCPUName(const ArgList &Args, const llvm::Triple &T,
265  bool FromAs) {
266  Arg *A;
267 
268  switch (T.getArch()) {
269  default:
270  return "";
271 
272  case llvm::Triple::aarch64:
273  case llvm::Triple::aarch64_be:
274  return aarch64::getAArch64TargetCPU(Args, A);
275 
276  case llvm::Triple::arm:
277  case llvm::Triple::armeb:
278  case llvm::Triple::thumb:
279  case llvm::Triple::thumbeb: {
280  StringRef MArch, MCPU;
281  arm::getARMArchCPUFromArgs(Args, MArch, MCPU, FromAs);
282  return arm::getARMTargetCPU(MCPU, MArch, T);
283  }
284 
285  case llvm::Triple::avr:
286  if (const Arg *A = Args.getLastArg(options::OPT_mmcu_EQ))
287  return A->getValue();
288  return "";
289 
290  case llvm::Triple::nios2: {
291  return getNios2TargetCPU(Args);
292  }
293 
294  case llvm::Triple::mips:
295  case llvm::Triple::mipsel:
296  case llvm::Triple::mips64:
297  case llvm::Triple::mips64el: {
298  StringRef CPUName;
299  StringRef ABIName;
300  mips::getMipsCPUAndABI(Args, T, CPUName, ABIName);
301  return CPUName;
302  }
303 
304  case llvm::Triple::nvptx:
305  case llvm::Triple::nvptx64:
306  if (const Arg *A = Args.getLastArg(options::OPT_march_EQ))
307  return A->getValue();
308  return "";
309 
310  case llvm::Triple::ppc:
311  case llvm::Triple::ppc64:
312  case llvm::Triple::ppc64le: {
313  std::string TargetCPUName = ppc::getPPCTargetCPU(Args);
314  // LLVM may default to generating code for the native CPU,
315  // but, like gcc, we default to a more generic option for
316  // each architecture. (except on Darwin)
317  if (TargetCPUName.empty() && !T.isOSDarwin()) {
318  if (T.getArch() == llvm::Triple::ppc64)
319  TargetCPUName = "ppc64";
320  else if (T.getArch() == llvm::Triple::ppc64le)
321  TargetCPUName = "ppc64le";
322  else
323  TargetCPUName = "ppc";
324  }
325  return TargetCPUName;
326  }
327 
328  case llvm::Triple::bpfel:
329  case llvm::Triple::bpfeb:
330  case llvm::Triple::sparc:
331  case llvm::Triple::sparcel:
332  case llvm::Triple::sparcv9:
333  if (const Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
334  return A->getValue();
335  return "";
336 
337  case llvm::Triple::x86:
338  case llvm::Triple::x86_64:
339  return x86::getX86TargetCPU(Args, T);
340 
341  case llvm::Triple::hexagon:
342  return "hexagon" +
344 
345  case llvm::Triple::lanai:
346  return getLanaiTargetCPU(Args);
347 
348  case llvm::Triple::systemz:
349  return systemz::getSystemZTargetCPU(Args);
350 
351  case llvm::Triple::r600:
352  case llvm::Triple::amdgcn:
353  return getR600TargetGPU(Args);
354 
355  case llvm::Triple::wasm32:
356  case llvm::Triple::wasm64:
357  return getWebAssemblyTargetCPU(Args);
358  }
359 }
360 
361 unsigned tools::getLTOParallelism(const ArgList &Args, const Driver &D) {
362  unsigned Parallelism = 0;
363  Arg *LtoJobsArg = Args.getLastArg(options::OPT_flto_jobs_EQ);
364  if (LtoJobsArg &&
365  StringRef(LtoJobsArg->getValue()).getAsInteger(10, Parallelism))
366  D.Diag(diag::err_drv_invalid_int_value) << LtoJobsArg->getAsString(Args)
367  << LtoJobsArg->getValue();
368  return Parallelism;
369 }
370 
371 // CloudABI uses -ffunction-sections and -fdata-sections by default.
372 bool tools::isUseSeparateSections(const llvm::Triple &Triple) {
373  return Triple.getOS() == llvm::Triple::CloudABI;
374 }
375 
376 void tools::AddGoldPlugin(const ToolChain &ToolChain, const ArgList &Args,
377  ArgStringList &CmdArgs, const InputInfo &Output,
378  const InputInfo &Input, bool IsThinLTO) {
379  // Tell the linker to load the plugin. This has to come before AddLinkerInputs
380  // as gold requires -plugin to come before any -plugin-opt that -Wl might
381  // forward.
382  CmdArgs.push_back("-plugin");
383 
384 #if defined(_WIN32)
385  const char *Suffix = ".dll";
386 #elif defined(__APPLE__)
387  const char *Suffix = ".dylib";
388 #else
389  const char *Suffix = ".so";
390 #endif
391 
392  SmallString<1024> Plugin;
393  llvm::sys::path::native(Twine(ToolChain.getDriver().Dir) +
394  "/../lib" CLANG_LIBDIR_SUFFIX "/LLVMgold" +
395  Suffix,
396  Plugin);
397  CmdArgs.push_back(Args.MakeArgString(Plugin));
398 
399  // Try to pass driver level flags relevant to LTO code generation down to
400  // the plugin.
401 
402  // Handle flags for selecting CPU variants.
403  std::string CPU = getCPUName(Args, ToolChain.getTriple());
404  if (!CPU.empty())
405  CmdArgs.push_back(Args.MakeArgString(Twine("-plugin-opt=mcpu=") + CPU));
406 
407  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
408  StringRef OOpt;
409  if (A->getOption().matches(options::OPT_O4) ||
410  A->getOption().matches(options::OPT_Ofast))
411  OOpt = "3";
412  else if (A->getOption().matches(options::OPT_O))
413  OOpt = A->getValue();
414  else if (A->getOption().matches(options::OPT_O0))
415  OOpt = "0";
416  if (!OOpt.empty())
417  CmdArgs.push_back(Args.MakeArgString(Twine("-plugin-opt=O") + OOpt));
418  }
419 
420  if (Args.hasArg(options::OPT_gsplit_dwarf)) {
421  CmdArgs.push_back(
422  Args.MakeArgString(Twine("-plugin-opt=dwo_dir=") +
423  Output.getFilename() + "_dwo"));
424  }
425 
426  if (IsThinLTO)
427  CmdArgs.push_back("-plugin-opt=thinlto");
428 
429  if (unsigned Parallelism = getLTOParallelism(Args, ToolChain.getDriver()))
430  CmdArgs.push_back(
431  Args.MakeArgString("-plugin-opt=jobs=" + Twine(Parallelism)));
432 
433  // If an explicit debugger tuning argument appeared, pass it along.
434  if (Arg *A = Args.getLastArg(options::OPT_gTune_Group,
435  options::OPT_ggdbN_Group)) {
436  if (A->getOption().matches(options::OPT_glldb))
437  CmdArgs.push_back("-plugin-opt=-debugger-tune=lldb");
438  else if (A->getOption().matches(options::OPT_gsce))
439  CmdArgs.push_back("-plugin-opt=-debugger-tune=sce");
440  else
441  CmdArgs.push_back("-plugin-opt=-debugger-tune=gdb");
442  }
443 
444  bool UseSeparateSections =
446 
447  if (Args.hasFlag(options::OPT_ffunction_sections,
448  options::OPT_fno_function_sections, UseSeparateSections)) {
449  CmdArgs.push_back("-plugin-opt=-function-sections");
450  }
451 
452  if (Args.hasFlag(options::OPT_fdata_sections, options::OPT_fno_data_sections,
453  UseSeparateSections)) {
454  CmdArgs.push_back("-plugin-opt=-data-sections");
455  }
456 
457  if (Arg *A = getLastProfileSampleUseArg(Args)) {
458  StringRef FName = A->getValue();
459  if (!llvm::sys::fs::exists(FName))
460  ToolChain.getDriver().Diag(diag::err_drv_no_such_file) << FName;
461  else
462  CmdArgs.push_back(
463  Args.MakeArgString(Twine("-plugin-opt=sample-profile=") + FName));
464  }
465 
466  // Need this flag to turn on new pass manager via Gold plugin.
467  if (Args.hasFlag(options::OPT_fexperimental_new_pass_manager,
468  options::OPT_fno_experimental_new_pass_manager,
469  /* Default */ ENABLE_EXPERIMENTAL_NEW_PASS_MANAGER)) {
470  CmdArgs.push_back("-plugin-opt=new-pass-manager");
471  }
472 
473  // Setup statistics file output.
474  SmallString<128> StatsFile =
475  getStatsFileName(Args, Output, Input, ToolChain.getDriver());
476  if (!StatsFile.empty())
477  CmdArgs.push_back(
478  Args.MakeArgString(Twine("-plugin-opt=stats-file=") + StatsFile));
479 }
480 
481 void tools::addArchSpecificRPath(const ToolChain &TC, const ArgList &Args,
482  ArgStringList &CmdArgs) {
483  if (!Args.hasFlag(options::OPT_frtlib_add_rpath,
484  options::OPT_fno_rtlib_add_rpath, false))
485  return;
486 
487  std::string CandidateRPath = TC.getArchSpecificLibPath();
488  if (TC.getVFS().exists(CandidateRPath)) {
489  CmdArgs.push_back("-rpath");
490  CmdArgs.push_back(Args.MakeArgString(CandidateRPath.c_str()));
491  }
492 }
493 
494 bool tools::addOpenMPRuntime(ArgStringList &CmdArgs, const ToolChain &TC,
495  const ArgList &Args, bool IsOffloadingHost,
496  bool GompNeedsRT) {
497  if (!Args.hasFlag(options::OPT_fopenmp, options::OPT_fopenmp_EQ,
498  options::OPT_fno_openmp, false))
499  return false;
500 
501  switch (TC.getDriver().getOpenMPRuntime(Args)) {
502  case Driver::OMPRT_OMP:
503  CmdArgs.push_back("-lomp");
504  break;
505  case Driver::OMPRT_GOMP:
506  CmdArgs.push_back("-lgomp");
507 
508  if (GompNeedsRT)
509  CmdArgs.push_back("-lrt");
510  break;
511  case Driver::OMPRT_IOMP5:
512  CmdArgs.push_back("-liomp5");
513  break;
515  // Already diagnosed.
516  return false;
517  }
518 
519  if (IsOffloadingHost)
520  CmdArgs.push_back("-lomptarget");
521 
522  addArchSpecificRPath(TC, Args, CmdArgs);
523 
524  return true;
525 }
526 
527 static void addSanitizerRuntime(const ToolChain &TC, const ArgList &Args,
528  ArgStringList &CmdArgs, StringRef Sanitizer,
529  bool IsShared, bool IsWhole) {
530  // Wrap any static runtimes that must be forced into executable in
531  // whole-archive.
532  if (IsWhole) CmdArgs.push_back("--whole-archive");
533  CmdArgs.push_back(TC.getCompilerRTArgString(Args, Sanitizer, IsShared));
534  if (IsWhole) CmdArgs.push_back("--no-whole-archive");
535 
536  if (IsShared) {
537  addArchSpecificRPath(TC, Args, CmdArgs);
538  }
539 }
540 
541 // Tries to use a file with the list of dynamic symbols that need to be exported
542 // from the runtime library. Returns true if the file was found.
543 static bool addSanitizerDynamicList(const ToolChain &TC, const ArgList &Args,
544  ArgStringList &CmdArgs,
545  StringRef Sanitizer) {
546  // Solaris ld defaults to --export-dynamic behaviour but doesn't support
547  // the option, so don't try to pass it.
548  if (TC.getTriple().getOS() == llvm::Triple::Solaris)
549  return true;
550  // Myriad is static linking only. Furthermore, some versions of its
551  // linker have the bug where --export-dynamic overrides -static, so
552  // don't use --export-dynamic on that platform.
553  if (TC.getTriple().getVendor() == llvm::Triple::Myriad)
554  return true;
555  SmallString<128> SanRT(TC.getCompilerRT(Args, Sanitizer));
556  if (llvm::sys::fs::exists(SanRT + ".syms")) {
557  CmdArgs.push_back(Args.MakeArgString("--dynamic-list=" + SanRT + ".syms"));
558  return true;
559  }
560  return false;
561 }
562 
563 void tools::linkSanitizerRuntimeDeps(const ToolChain &TC,
564  ArgStringList &CmdArgs) {
565  // Force linking against the system libraries sanitizers depends on
566  // (see PR15823 why this is necessary).
567  CmdArgs.push_back("--no-as-needed");
568  // There's no libpthread or librt on RTEMS & Android.
569  if (TC.getTriple().getOS() != llvm::Triple::RTEMS &&
570  !TC.getTriple().isAndroid()) {
571  CmdArgs.push_back("-lpthread");
572  if (TC.getTriple().getOS() != llvm::Triple::OpenBSD)
573  CmdArgs.push_back("-lrt");
574  }
575  CmdArgs.push_back("-lm");
576  // There's no libdl on all OSes.
577  if (TC.getTriple().getOS() != llvm::Triple::FreeBSD &&
578  TC.getTriple().getOS() != llvm::Triple::NetBSD &&
579  TC.getTriple().getOS() != llvm::Triple::OpenBSD &&
580  TC.getTriple().getOS() != llvm::Triple::RTEMS)
581  CmdArgs.push_back("-ldl");
582  // Required for backtrace on some OSes
583  if (TC.getTriple().getOS() == llvm::Triple::NetBSD ||
584  TC.getTriple().getOS() == llvm::Triple::FreeBSD)
585  CmdArgs.push_back("-lexecinfo");
586 }
587 
588 static void
589 collectSanitizerRuntimes(const ToolChain &TC, const ArgList &Args,
590  SmallVectorImpl<StringRef> &SharedRuntimes,
591  SmallVectorImpl<StringRef> &StaticRuntimes,
592  SmallVectorImpl<StringRef> &NonWholeStaticRuntimes,
593  SmallVectorImpl<StringRef> &HelperStaticRuntimes,
594  SmallVectorImpl<StringRef> &RequiredSymbols) {
595  const SanitizerArgs &SanArgs = TC.getSanitizerArgs();
596  // Collect shared runtimes.
597  if (SanArgs.needsSharedRt()) {
598  if (SanArgs.needsAsanRt()) {
599  SharedRuntimes.push_back("asan");
600  if (!Args.hasArg(options::OPT_shared) && !TC.getTriple().isAndroid())
601  HelperStaticRuntimes.push_back("asan-preinit");
602  }
603  if (SanArgs.needsUbsanRt()) {
604  if (SanArgs.requiresMinimalRuntime())
605  SharedRuntimes.push_back("ubsan_minimal");
606  else
607  SharedRuntimes.push_back("ubsan_standalone");
608  }
609  if (SanArgs.needsScudoRt()) {
610  if (SanArgs.requiresMinimalRuntime())
611  SharedRuntimes.push_back("scudo_minimal");
612  else
613  SharedRuntimes.push_back("scudo");
614  }
615  if (SanArgs.needsHwasanRt())
616  SharedRuntimes.push_back("hwasan");
617  }
618 
619  // The stats_client library is also statically linked into DSOs.
620  if (SanArgs.needsStatsRt())
621  StaticRuntimes.push_back("stats_client");
622 
623  // Collect static runtimes.
624  if (Args.hasArg(options::OPT_shared) || SanArgs.needsSharedRt()) {
625  // Don't link static runtimes into DSOs or if -shared-libasan.
626  return;
627  }
628  if (SanArgs.needsAsanRt()) {
629  StaticRuntimes.push_back("asan");
630  if (SanArgs.linkCXXRuntimes())
631  StaticRuntimes.push_back("asan_cxx");
632  }
633 
634  if (SanArgs.needsHwasanRt()) {
635  StaticRuntimes.push_back("hwasan");
636  if (SanArgs.linkCXXRuntimes())
637  StaticRuntimes.push_back("hwasan_cxx");
638  }
639  if (SanArgs.needsDfsanRt())
640  StaticRuntimes.push_back("dfsan");
641  if (SanArgs.needsLsanRt())
642  StaticRuntimes.push_back("lsan");
643  if (SanArgs.needsMsanRt()) {
644  StaticRuntimes.push_back("msan");
645  if (SanArgs.linkCXXRuntimes())
646  StaticRuntimes.push_back("msan_cxx");
647  }
648  if (SanArgs.needsTsanRt()) {
649  StaticRuntimes.push_back("tsan");
650  if (SanArgs.linkCXXRuntimes())
651  StaticRuntimes.push_back("tsan_cxx");
652  }
653  if (SanArgs.needsUbsanRt()) {
654  if (SanArgs.requiresMinimalRuntime()) {
655  StaticRuntimes.push_back("ubsan_minimal");
656  } else {
657  StaticRuntimes.push_back("ubsan_standalone");
658  if (SanArgs.linkCXXRuntimes())
659  StaticRuntimes.push_back("ubsan_standalone_cxx");
660  }
661  }
662  if (SanArgs.needsSafeStackRt()) {
663  NonWholeStaticRuntimes.push_back("safestack");
664  RequiredSymbols.push_back("__safestack_init");
665  }
666  if (SanArgs.needsCfiRt())
667  StaticRuntimes.push_back("cfi");
668  if (SanArgs.needsCfiDiagRt()) {
669  StaticRuntimes.push_back("cfi_diag");
670  if (SanArgs.linkCXXRuntimes())
671  StaticRuntimes.push_back("ubsan_standalone_cxx");
672  }
673  if (SanArgs.needsStatsRt()) {
674  NonWholeStaticRuntimes.push_back("stats");
675  RequiredSymbols.push_back("__sanitizer_stats_register");
676  }
677  if (SanArgs.needsEsanRt())
678  StaticRuntimes.push_back("esan");
679  if (SanArgs.needsScudoRt()) {
680  if (SanArgs.requiresMinimalRuntime()) {
681  StaticRuntimes.push_back("scudo_minimal");
682  if (SanArgs.linkCXXRuntimes())
683  StaticRuntimes.push_back("scudo_cxx_minimal");
684  } else {
685  StaticRuntimes.push_back("scudo");
686  if (SanArgs.linkCXXRuntimes())
687  StaticRuntimes.push_back("scudo_cxx");
688  }
689  }
690 }
691 
692 // Should be called before we add system libraries (C++ ABI, libstdc++/libc++,
693 // C runtime, etc). Returns true if sanitizer system deps need to be linked in.
694 bool tools::addSanitizerRuntimes(const ToolChain &TC, const ArgList &Args,
695  ArgStringList &CmdArgs) {
696  SmallVector<StringRef, 4> SharedRuntimes, StaticRuntimes,
697  NonWholeStaticRuntimes, HelperStaticRuntimes, RequiredSymbols;
698  collectSanitizerRuntimes(TC, Args, SharedRuntimes, StaticRuntimes,
699  NonWholeStaticRuntimes, HelperStaticRuntimes,
700  RequiredSymbols);
701 
702  // Inject libfuzzer dependencies.
703  if (TC.getSanitizerArgs().needsFuzzer()
704  && !Args.hasArg(options::OPT_shared)) {
705 
706  addSanitizerRuntime(TC, Args, CmdArgs, "fuzzer", false, true);
707  if (!Args.hasArg(clang::driver::options::OPT_nostdlibxx))
708  TC.AddCXXStdlibLibArgs(Args, CmdArgs);
709  }
710 
711  for (auto RT : SharedRuntimes)
712  addSanitizerRuntime(TC, Args, CmdArgs, RT, true, false);
713  for (auto RT : HelperStaticRuntimes)
714  addSanitizerRuntime(TC, Args, CmdArgs, RT, false, true);
715  bool AddExportDynamic = false;
716  for (auto RT : StaticRuntimes) {
717  addSanitizerRuntime(TC, Args, CmdArgs, RT, false, true);
718  AddExportDynamic |= !addSanitizerDynamicList(TC, Args, CmdArgs, RT);
719  }
720  for (auto RT : NonWholeStaticRuntimes) {
721  addSanitizerRuntime(TC, Args, CmdArgs, RT, false, false);
722  AddExportDynamic |= !addSanitizerDynamicList(TC, Args, CmdArgs, RT);
723  }
724  for (auto S : RequiredSymbols) {
725  CmdArgs.push_back("-u");
726  CmdArgs.push_back(Args.MakeArgString(S));
727  }
728  // If there is a static runtime with no dynamic list, force all the symbols
729  // to be dynamic to be sure we export sanitizer interface functions.
730  if (AddExportDynamic)
731  CmdArgs.push_back("--export-dynamic");
732 
733  const SanitizerArgs &SanArgs = TC.getSanitizerArgs();
734  if (SanArgs.hasCrossDsoCfi() && !AddExportDynamic)
735  CmdArgs.push_back("-export-dynamic-symbol=__cfi_check");
736 
737  return !StaticRuntimes.empty() || !NonWholeStaticRuntimes.empty();
738 }
739 
740 bool tools::addXRayRuntime(const ToolChain&TC, const ArgList &Args, ArgStringList &CmdArgs) {
741  if (Args.hasArg(options::OPT_shared))
742  return false;
743 
744  if (TC.getXRayArgs().needsXRayRt()) {
745  CmdArgs.push_back("-whole-archive");
746  CmdArgs.push_back(TC.getCompilerRTArgString(Args, "xray", false));
747  for (const auto &Mode : TC.getXRayArgs().modeList())
748  CmdArgs.push_back(TC.getCompilerRTArgString(Args, Mode, false));
749  CmdArgs.push_back("-no-whole-archive");
750  return true;
751  }
752 
753  return false;
754 }
755 
756 void tools::linkXRayRuntimeDeps(const ToolChain &TC, ArgStringList &CmdArgs) {
757  CmdArgs.push_back("--no-as-needed");
758  CmdArgs.push_back("-lpthread");
759  if (TC.getTriple().getOS() != llvm::Triple::OpenBSD)
760  CmdArgs.push_back("-lrt");
761  CmdArgs.push_back("-lm");
762 
763  if (TC.getTriple().getOS() != llvm::Triple::FreeBSD &&
764  TC.getTriple().getOS() != llvm::Triple::NetBSD &&
765  TC.getTriple().getOS() != llvm::Triple::OpenBSD)
766  CmdArgs.push_back("-ldl");
767 }
768 
769 bool tools::areOptimizationsEnabled(const ArgList &Args) {
770  // Find the last -O arg and see if it is non-zero.
771  if (Arg *A = Args.getLastArg(options::OPT_O_Group))
772  return !A->getOption().matches(options::OPT_O0);
773  // Defaults to -O0.
774  return false;
775 }
776 
777 const char *tools::SplitDebugName(const ArgList &Args, const InputInfo &Input) {
778  Arg *FinalOutput = Args.getLastArg(options::OPT_o);
779  if (FinalOutput && Args.hasArg(options::OPT_c)) {
780  SmallString<128> T(FinalOutput->getValue());
781  llvm::sys::path::replace_extension(T, "dwo");
782  return Args.MakeArgString(T);
783  } else {
784  // Use the compilation dir.
786  Args.getLastArgValue(options::OPT_fdebug_compilation_dir));
787  SmallString<128> F(llvm::sys::path::stem(Input.getBaseInput()));
788  llvm::sys::path::replace_extension(F, "dwo");
789  T += F;
790  return Args.MakeArgString(F);
791  }
792 }
793 
794 void tools::SplitDebugInfo(const ToolChain &TC, Compilation &C, const Tool &T,
795  const JobAction &JA, const ArgList &Args,
796  const InputInfo &Output, const char *OutFile) {
797  ArgStringList ExtractArgs;
798  ExtractArgs.push_back("--extract-dwo");
799 
800  ArgStringList StripArgs;
801  StripArgs.push_back("--strip-dwo");
802 
803  // Grabbing the output of the earlier compile step.
804  StripArgs.push_back(Output.getFilename());
805  ExtractArgs.push_back(Output.getFilename());
806  ExtractArgs.push_back(OutFile);
807 
808  const char *Exec =
809  Args.MakeArgString(TC.GetProgramPath(CLANG_DEFAULT_OBJCOPY));
810  InputInfo II(types::TY_Object, Output.getFilename(), Output.getFilename());
811 
812  // First extract the dwo sections.
813  C.addCommand(llvm::make_unique<Command>(JA, T, Exec, ExtractArgs, II));
814 
815  // Then remove them from the original .o file.
816  C.addCommand(llvm::make_unique<Command>(JA, T, Exec, StripArgs, II));
817 }
818 
819 // Claim options we don't want to warn if they are unused. We do this for
820 // options that build systems might add but are unused when assembling or only
821 // running the preprocessor for example.
822 void tools::claimNoWarnArgs(const ArgList &Args) {
823  // Don't warn about unused -f(no-)?lto. This can happen when we're
824  // preprocessing, precompiling or assembling.
825  Args.ClaimAllArgs(options::OPT_flto_EQ);
826  Args.ClaimAllArgs(options::OPT_flto);
827  Args.ClaimAllArgs(options::OPT_fno_lto);
828 }
829 
830 Arg *tools::getLastProfileUseArg(const ArgList &Args) {
831  auto *ProfileUseArg = Args.getLastArg(
832  options::OPT_fprofile_instr_use, options::OPT_fprofile_instr_use_EQ,
833  options::OPT_fprofile_use, options::OPT_fprofile_use_EQ,
834  options::OPT_fno_profile_instr_use);
835 
836  if (ProfileUseArg &&
837  ProfileUseArg->getOption().matches(options::OPT_fno_profile_instr_use))
838  ProfileUseArg = nullptr;
839 
840  return ProfileUseArg;
841 }
842 
843 Arg *tools::getLastProfileSampleUseArg(const ArgList &Args) {
844  auto *ProfileSampleUseArg = Args.getLastArg(
845  options::OPT_fprofile_sample_use, options::OPT_fprofile_sample_use_EQ,
846  options::OPT_fauto_profile, options::OPT_fauto_profile_EQ,
847  options::OPT_fno_profile_sample_use, options::OPT_fno_auto_profile);
848 
849  if (ProfileSampleUseArg &&
850  (ProfileSampleUseArg->getOption().matches(
851  options::OPT_fno_profile_sample_use) ||
852  ProfileSampleUseArg->getOption().matches(options::OPT_fno_auto_profile)))
853  return nullptr;
854 
855  return Args.getLastArg(options::OPT_fprofile_sample_use_EQ,
856  options::OPT_fauto_profile_EQ);
857 }
858 
859 /// Parses the various -fpic/-fPIC/-fpie/-fPIE arguments. Then,
860 /// smooshes them together with platform defaults, to decide whether
861 /// this compile should be using PIC mode or not. Returns a tuple of
862 /// (RelocationModel, PICLevel, IsPIE).
863 std::tuple<llvm::Reloc::Model, unsigned, bool>
864 tools::ParsePICArgs(const ToolChain &ToolChain, const ArgList &Args) {
865  const llvm::Triple &EffectiveTriple = ToolChain.getEffectiveTriple();
866  const llvm::Triple &Triple = ToolChain.getTriple();
867 
868  bool PIE = ToolChain.isPIEDefault();
869  bool PIC = PIE || ToolChain.isPICDefault();
870  // The Darwin/MachO default to use PIC does not apply when using -static.
871  if (Triple.isOSBinFormatMachO() && Args.hasArg(options::OPT_static))
872  PIE = PIC = false;
873  bool IsPICLevelTwo = PIC;
874 
875  bool KernelOrKext =
876  Args.hasArg(options::OPT_mkernel, options::OPT_fapple_kext);
877 
878  // Android-specific defaults for PIC/PIE
879  if (Triple.isAndroid()) {
880  switch (Triple.getArch()) {
881  case llvm::Triple::arm:
882  case llvm::Triple::armeb:
883  case llvm::Triple::thumb:
884  case llvm::Triple::thumbeb:
885  case llvm::Triple::aarch64:
886  case llvm::Triple::mips:
887  case llvm::Triple::mipsel:
888  case llvm::Triple::mips64:
889  case llvm::Triple::mips64el:
890  PIC = true; // "-fpic"
891  break;
892 
893  case llvm::Triple::x86:
894  case llvm::Triple::x86_64:
895  PIC = true; // "-fPIC"
896  IsPICLevelTwo = true;
897  break;
898 
899  default:
900  break;
901  }
902  }
903 
904  // OpenBSD-specific defaults for PIE
905  if (Triple.getOS() == llvm::Triple::OpenBSD) {
906  switch (ToolChain.getArch()) {
907  case llvm::Triple::arm:
908  case llvm::Triple::aarch64:
909  case llvm::Triple::mips64:
910  case llvm::Triple::mips64el:
911  case llvm::Triple::x86:
912  case llvm::Triple::x86_64:
913  IsPICLevelTwo = false; // "-fpie"
914  break;
915 
916  case llvm::Triple::ppc:
917  case llvm::Triple::sparc:
918  case llvm::Triple::sparcel:
919  case llvm::Triple::sparcv9:
920  IsPICLevelTwo = true; // "-fPIE"
921  break;
922 
923  default:
924  break;
925  }
926  }
927 
928  // AMDGPU-specific defaults for PIC.
929  if (Triple.getArch() == llvm::Triple::amdgcn)
930  PIC = true;
931 
932  // The last argument relating to either PIC or PIE wins, and no
933  // other argument is used. If the last argument is any flavor of the
934  // '-fno-...' arguments, both PIC and PIE are disabled. Any PIE
935  // option implicitly enables PIC at the same level.
936  Arg *LastPICArg = Args.getLastArg(options::OPT_fPIC, options::OPT_fno_PIC,
937  options::OPT_fpic, options::OPT_fno_pic,
938  options::OPT_fPIE, options::OPT_fno_PIE,
939  options::OPT_fpie, options::OPT_fno_pie);
940  if (Triple.isOSWindows() && LastPICArg &&
941  LastPICArg ==
942  Args.getLastArg(options::OPT_fPIC, options::OPT_fpic,
943  options::OPT_fPIE, options::OPT_fpie)) {
944  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
945  << LastPICArg->getSpelling() << Triple.str();
946  if (Triple.getArch() == llvm::Triple::x86_64)
947  return std::make_tuple(llvm::Reloc::PIC_, 2U, false);
948  return std::make_tuple(llvm::Reloc::Static, 0U, false);
949  }
950 
951  // Check whether the tool chain trumps the PIC-ness decision. If the PIC-ness
952  // is forced, then neither PIC nor PIE flags will have no effect.
953  if (!ToolChain.isPICDefaultForced()) {
954  if (LastPICArg) {
955  Option O = LastPICArg->getOption();
956  if (O.matches(options::OPT_fPIC) || O.matches(options::OPT_fpic) ||
957  O.matches(options::OPT_fPIE) || O.matches(options::OPT_fpie)) {
958  PIE = O.matches(options::OPT_fPIE) || O.matches(options::OPT_fpie);
959  PIC =
960  PIE || O.matches(options::OPT_fPIC) || O.matches(options::OPT_fpic);
961  IsPICLevelTwo =
962  O.matches(options::OPT_fPIE) || O.matches(options::OPT_fPIC);
963  } else {
964  PIE = PIC = false;
965  if (EffectiveTriple.isPS4CPU()) {
966  Arg *ModelArg = Args.getLastArg(options::OPT_mcmodel_EQ);
967  StringRef Model = ModelArg ? ModelArg->getValue() : "";
968  if (Model != "kernel") {
969  PIC = true;
970  ToolChain.getDriver().Diag(diag::warn_drv_ps4_force_pic)
971  << LastPICArg->getSpelling();
972  }
973  }
974  }
975  }
976  }
977 
978  // Introduce a Darwin and PS4-specific hack. If the default is PIC, but the
979  // PIC level would've been set to level 1, force it back to level 2 PIC
980  // instead.
981  if (PIC && (Triple.isOSDarwin() || EffectiveTriple.isPS4CPU()))
982  IsPICLevelTwo |= ToolChain.isPICDefault();
983 
984  // This kernel flags are a trump-card: they will disable PIC/PIE
985  // generation, independent of the argument order.
986  if (KernelOrKext &&
987  ((!EffectiveTriple.isiOS() || EffectiveTriple.isOSVersionLT(6)) &&
988  !EffectiveTriple.isWatchOS()))
989  PIC = PIE = false;
990 
991  if (Arg *A = Args.getLastArg(options::OPT_mdynamic_no_pic)) {
992  // This is a very special mode. It trumps the other modes, almost no one
993  // uses it, and it isn't even valid on any OS but Darwin.
994  if (!Triple.isOSDarwin())
995  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
996  << A->getSpelling() << Triple.str();
997 
998  // FIXME: Warn when this flag trumps some other PIC or PIE flag.
999 
1000  // Only a forced PIC mode can cause the actual compile to have PIC defines
1001  // etc., no flags are sufficient. This behavior was selected to closely
1002  // match that of llvm-gcc and Apple GCC before that.
1003  PIC = ToolChain.isPICDefault() && ToolChain.isPICDefaultForced();
1004 
1005  return std::make_tuple(llvm::Reloc::DynamicNoPIC, PIC ? 2U : 0U, false);
1006  }
1007 
1008  bool EmbeddedPISupported;
1009  switch (Triple.getArch()) {
1010  case llvm::Triple::arm:
1011  case llvm::Triple::armeb:
1012  case llvm::Triple::thumb:
1013  case llvm::Triple::thumbeb:
1014  EmbeddedPISupported = true;
1015  break;
1016  default:
1017  EmbeddedPISupported = false;
1018  break;
1019  }
1020 
1021  bool ROPI = false, RWPI = false;
1022  Arg* LastROPIArg = Args.getLastArg(options::OPT_fropi, options::OPT_fno_ropi);
1023  if (LastROPIArg && LastROPIArg->getOption().matches(options::OPT_fropi)) {
1024  if (!EmbeddedPISupported)
1025  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
1026  << LastROPIArg->getSpelling() << Triple.str();
1027  ROPI = true;
1028  }
1029  Arg *LastRWPIArg = Args.getLastArg(options::OPT_frwpi, options::OPT_fno_rwpi);
1030  if (LastRWPIArg && LastRWPIArg->getOption().matches(options::OPT_frwpi)) {
1031  if (!EmbeddedPISupported)
1032  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
1033  << LastRWPIArg->getSpelling() << Triple.str();
1034  RWPI = true;
1035  }
1036 
1037  // ROPI and RWPI are not compatible with PIC or PIE.
1038  if ((ROPI || RWPI) && (PIC || PIE))
1039  ToolChain.getDriver().Diag(diag::err_drv_ropi_rwpi_incompatible_with_pic);
1040 
1041  if (Triple.isMIPS()) {
1042  StringRef CPUName;
1043  StringRef ABIName;
1044  mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName);
1045  // When targeting the N64 ABI, PIC is the default, except in the case
1046  // when the -mno-abicalls option is used. In that case we exit
1047  // at next check regardless of PIC being set below.
1048  if (ABIName == "n64")
1049  PIC = true;
1050  // When targettng MIPS with -mno-abicalls, it's always static.
1051  if(Args.hasArg(options::OPT_mno_abicalls))
1052  return std::make_tuple(llvm::Reloc::Static, 0U, false);
1053  // Unlike other architectures, MIPS, even with -fPIC/-mxgot/multigot,
1054  // does not use PIC level 2 for historical reasons.
1055  IsPICLevelTwo = false;
1056  }
1057 
1058  if (PIC)
1059  return std::make_tuple(llvm::Reloc::PIC_, IsPICLevelTwo ? 2U : 1U, PIE);
1060 
1061  llvm::Reloc::Model RelocM = llvm::Reloc::Static;
1062  if (ROPI && RWPI)
1063  RelocM = llvm::Reloc::ROPI_RWPI;
1064  else if (ROPI)
1065  RelocM = llvm::Reloc::ROPI;
1066  else if (RWPI)
1067  RelocM = llvm::Reloc::RWPI;
1068 
1069  return std::make_tuple(RelocM, 0U, false);
1070 }
1071 
1072 // `-falign-functions` indicates that the functions should be aligned to a
1073 // 16-byte boundary.
1074 //
1075 // `-falign-functions=1` is the same as `-fno-align-functions`.
1076 //
1077 // The scalar `n` in `-falign-functions=n` must be an integral value between
1078 // [0, 65536]. If the value is not a power-of-two, it will be rounded up to
1079 // the nearest power-of-two.
1080 //
1081 // If we return `0`, the frontend will default to the backend's preferred
1082 // alignment.
1083 //
1084 // NOTE: icc only allows values between [0, 4096]. icc uses `-falign-functions`
1085 // to mean `-falign-functions=16`. GCC defaults to the backend's preferred
1086 // alignment. For unaligned functions, we default to the backend's preferred
1087 // alignment.
1088 unsigned tools::ParseFunctionAlignment(const ToolChain &TC,
1089  const ArgList &Args) {
1090  const Arg *A = Args.getLastArg(options::OPT_falign_functions,
1091  options::OPT_falign_functions_EQ,
1092  options::OPT_fno_align_functions);
1093  if (!A || A->getOption().matches(options::OPT_fno_align_functions))
1094  return 0;
1095 
1096  if (A->getOption().matches(options::OPT_falign_functions))
1097  return 0;
1098 
1099  unsigned Value = 0;
1100  if (StringRef(A->getValue()).getAsInteger(10, Value) || Value > 65536)
1101  TC.getDriver().Diag(diag::err_drv_invalid_int_value)
1102  << A->getAsString(Args) << A->getValue();
1103  return Value ? llvm::Log2_32_Ceil(std::min(Value, 65536u)) : Value;
1104 }
1105 
1106 void tools::AddAssemblerKPIC(const ToolChain &ToolChain, const ArgList &Args,
1107  ArgStringList &CmdArgs) {
1108  llvm::Reloc::Model RelocationModel;
1109  unsigned PICLevel;
1110  bool IsPIE;
1111  std::tie(RelocationModel, PICLevel, IsPIE) = ParsePICArgs(ToolChain, Args);
1112 
1113  if (RelocationModel != llvm::Reloc::Static)
1114  CmdArgs.push_back("-KPIC");
1115 }
1116 
1117 /// Determine whether Objective-C automated reference counting is
1118 /// enabled.
1119 bool tools::isObjCAutoRefCount(const ArgList &Args) {
1120  return Args.hasFlag(options::OPT_fobjc_arc, options::OPT_fno_objc_arc, false);
1121 }
1122 
1123 static void AddLibgcc(const llvm::Triple &Triple, const Driver &D,
1124  ArgStringList &CmdArgs, const ArgList &Args) {
1125  bool isAndroid = Triple.isAndroid();
1126  bool isCygMing = Triple.isOSCygMing();
1127  bool IsIAMCU = Triple.isOSIAMCU();
1128  bool StaticLibgcc = Args.hasArg(options::OPT_static_libgcc) ||
1129  Args.hasArg(options::OPT_static);
1130 
1131  // The driver ignores -shared-libgcc and therefore treats such cases as
1132  // unspecified. Breaking out the two variables as below makes the current
1133  // behavior explicit.
1134  bool UnspecifiedLibgcc = !StaticLibgcc;
1135  bool SharedLibgcc = !StaticLibgcc;
1136 
1137  // Gcc adds libgcc arguments in various ways:
1138  //
1139  // gcc <none>: -lgcc --as-needed -lgcc_s --no-as-needed
1140  // g++ <none>: -lgcc_s -lgcc
1141  // gcc shared: -lgcc_s -lgcc
1142  // g++ shared: -lgcc_s -lgcc
1143  // gcc static: -lgcc -lgcc_eh
1144  // g++ static: -lgcc -lgcc_eh
1145  //
1146  // Also, certain targets need additional adjustments.
1147 
1148  bool LibGccFirst = (D.CCCIsCC() && UnspecifiedLibgcc) || StaticLibgcc;
1149  if (LibGccFirst)
1150  CmdArgs.push_back("-lgcc");
1151 
1152  bool AsNeeded = D.CCCIsCC() && !StaticLibgcc && !isAndroid && !isCygMing;
1153  if (AsNeeded)
1154  CmdArgs.push_back("--as-needed");
1155 
1156  if ((UnspecifiedLibgcc || SharedLibgcc) && !isAndroid)
1157  CmdArgs.push_back("-lgcc_s");
1158 
1159  else if (StaticLibgcc && !isAndroid && !IsIAMCU)
1160  CmdArgs.push_back("-lgcc_eh");
1161 
1162  if (AsNeeded)
1163  CmdArgs.push_back("--no-as-needed");
1164 
1165  if (!LibGccFirst)
1166  CmdArgs.push_back("-lgcc");
1167 
1168  // According to Android ABI, we have to link with libdl if we are
1169  // linking with non-static libgcc.
1170  //
1171  // NOTE: This fixes a link error on Android MIPS as well. The non-static
1172  // libgcc for MIPS relies on _Unwind_Find_FDE and dl_iterate_phdr from libdl.
1173  if (isAndroid && !StaticLibgcc)
1174  CmdArgs.push_back("-ldl");
1175 }
1176 
1177 void tools::AddRunTimeLibs(const ToolChain &TC, const Driver &D,
1178  ArgStringList &CmdArgs, const ArgList &Args) {
1179  // Make use of compiler-rt if --rtlib option is used
1181 
1182  switch (RLT) {
1184  CmdArgs.push_back(TC.getCompilerRTArgString(Args, "builtins"));
1185  break;
1186  case ToolChain::RLT_Libgcc:
1187  // Make sure libgcc is not used under MSVC environment by default
1188  if (TC.getTriple().isKnownWindowsMSVCEnvironment()) {
1189  // Issue error diagnostic if libgcc is explicitly specified
1190  // through command line as --rtlib option argument.
1191  if (Args.hasArg(options::OPT_rtlib_EQ)) {
1192  TC.getDriver().Diag(diag::err_drv_unsupported_rtlib_for_platform)
1193  << Args.getLastArg(options::OPT_rtlib_EQ)->getValue() << "MSVC";
1194  }
1195  } else
1196  AddLibgcc(TC.getTriple(), D, CmdArgs, Args);
1197  break;
1198  }
1199 }
1200 
1201 /// Add OpenMP linker script arguments at the end of the argument list so that
1202 /// the fat binary is built by embedding each of the device images into the
1203 /// host. The linker script also defines a few symbols required by the code
1204 /// generation so that the images can be easily retrieved at runtime by the
1205 /// offloading library. This should be used only in tool chains that support
1206 /// linker scripts.
1207 void tools::AddOpenMPLinkerScript(const ToolChain &TC, Compilation &C,
1208  const InputInfo &Output,
1209  const InputInfoList &Inputs,
1210  const ArgList &Args, ArgStringList &CmdArgs,
1211  const JobAction &JA) {
1212 
1213  // If this is not an OpenMP host toolchain, we don't need to do anything.
1215  return;
1216 
1217  // Create temporary linker script. Keep it if save-temps is enabled.
1218  const char *LKS;
1219  SmallString<256> Name = llvm::sys::path::filename(Output.getFilename());
1220  if (C.getDriver().isSaveTempsEnabled()) {
1221  llvm::sys::path::replace_extension(Name, "lk");
1222  LKS = C.getArgs().MakeArgString(Name.c_str());
1223  } else {
1224  llvm::sys::path::replace_extension(Name, "");
1225  Name = C.getDriver().GetTemporaryPath(Name, "lk");
1226  LKS = C.addTempFile(C.getArgs().MakeArgString(Name.c_str()));
1227  }
1228 
1229  // Add linker script option to the command.
1230  CmdArgs.push_back("-T");
1231  CmdArgs.push_back(LKS);
1232 
1233  // Create a buffer to write the contents of the linker script.
1234  std::string LksBuffer;
1235  llvm::raw_string_ostream LksStream(LksBuffer);
1236 
1237  // Get the OpenMP offload tool chains so that we can extract the triple
1238  // associated with each device input.
1239  auto OpenMPToolChains = C.getOffloadToolChains<Action::OFK_OpenMP>();
1240  assert(OpenMPToolChains.first != OpenMPToolChains.second &&
1241  "No OpenMP toolchains??");
1242 
1243  // Track the input file name and device triple in order to build the script,
1244  // inserting binaries in the designated sections.
1246 
1247  // Add commands to embed target binaries. We ensure that each section and
1248  // image is 16-byte aligned. This is not mandatory, but increases the
1249  // likelihood of data to be aligned with a cache block in several main host
1250  // machines.
1251  LksStream << "/*\n";
1252  LksStream << " OpenMP Offload Linker Script\n";
1253  LksStream << " *** Automatically generated by Clang ***\n";
1254  LksStream << "*/\n";
1255  LksStream << "TARGET(binary)\n";
1256  auto DTC = OpenMPToolChains.first;
1257  for (auto &II : Inputs) {
1258  const Action *A = II.getAction();
1259  // Is this a device linking action?
1260  if (A && isa<LinkJobAction>(A) &&
1262  assert(DTC != OpenMPToolChains.second &&
1263  "More device inputs than device toolchains??");
1264  InputBinaryInfo.push_back(std::make_pair(
1265  DTC->second->getTriple().normalize(), II.getFilename()));
1266  ++DTC;
1267  LksStream << "INPUT(" << II.getFilename() << ")\n";
1268  }
1269  }
1270 
1271  assert(DTC == OpenMPToolChains.second &&
1272  "Less device inputs than device toolchains??");
1273 
1274  LksStream << "SECTIONS\n";
1275  LksStream << "{\n";
1276 
1277  // Put each target binary into a separate section.
1278  for (const auto &BI : InputBinaryInfo) {
1279  LksStream << " .omp_offloading." << BI.first << " :\n";
1280  LksStream << " ALIGN(0x10)\n";
1281  LksStream << " {\n";
1282  LksStream << " PROVIDE_HIDDEN(.omp_offloading.img_start." << BI.first
1283  << " = .);\n";
1284  LksStream << " " << BI.second << "\n";
1285  LksStream << " PROVIDE_HIDDEN(.omp_offloading.img_end." << BI.first
1286  << " = .);\n";
1287  LksStream << " }\n";
1288  }
1289 
1290  // Add commands to define host entries begin and end. We use 1-byte subalign
1291  // so that the linker does not add any padding and the elements in this
1292  // section form an array.
1293  LksStream << " .omp_offloading.entries :\n";
1294  LksStream << " ALIGN(0x10)\n";
1295  LksStream << " SUBALIGN(0x01)\n";
1296  LksStream << " {\n";
1297  LksStream << " PROVIDE_HIDDEN(.omp_offloading.entries_begin = .);\n";
1298  LksStream << " *(.omp_offloading.entries)\n";
1299  LksStream << " PROVIDE_HIDDEN(.omp_offloading.entries_end = .);\n";
1300  LksStream << " }\n";
1301  LksStream << "}\n";
1302  LksStream << "INSERT BEFORE .data\n";
1303  LksStream.flush();
1304 
1305  // Dump the contents of the linker script if the user requested that. We
1306  // support this option to enable testing of behavior with -###.
1307  if (C.getArgs().hasArg(options::OPT_fopenmp_dump_offload_linker_script))
1308  llvm::errs() << LksBuffer;
1309 
1310  // If this is a dry run, do not create the linker script file.
1311  if (C.getArgs().hasArg(options::OPT__HASH_HASH_HASH))
1312  return;
1313 
1314  // Open script file and write the contents.
1315  std::error_code EC;
1316  llvm::raw_fd_ostream Lksf(LKS, EC, llvm::sys::fs::F_None);
1317 
1318  if (EC) {
1319  C.getDriver().Diag(clang::diag::err_unable_to_make_temp) << EC.message();
1320  return;
1321  }
1322 
1323  Lksf << LksBuffer;
1324 }
1325 
1326 /// Add HIP linker script arguments at the end of the argument list so that
1327 /// the fat binary is built by embedding the device images into the host. The
1328 /// linker script also defines a symbol required by the code generation so that
1329 /// the image can be retrieved at runtime. This should be used only in tool
1330 /// chains that support linker scripts.
1331 void tools::AddHIPLinkerScript(const ToolChain &TC, Compilation &C,
1332  const InputInfo &Output,
1333  const InputInfoList &Inputs, const ArgList &Args,
1334  ArgStringList &CmdArgs, const JobAction &JA,
1335  const Tool &T) {
1336 
1337  // If this is not a HIP host toolchain, we don't need to do anything.
1339  return;
1340 
1341  InputInfoList DeviceInputs;
1342  for (const auto &II : Inputs) {
1343  const Action *A = II.getAction();
1344  // Is this a device linking action?
1345  if (A && isa<LinkJobAction>(A) && A->isDeviceOffloading(Action::OFK_HIP)) {
1346  DeviceInputs.push_back(II);
1347  }
1348  }
1349 
1350  if (DeviceInputs.empty())
1351  return;
1352 
1353  // Create temporary linker script. Keep it if save-temps is enabled.
1354  const char *LKS;
1355  SmallString<256> Name = llvm::sys::path::filename(Output.getFilename());
1356  if (C.getDriver().isSaveTempsEnabled()) {
1357  llvm::sys::path::replace_extension(Name, "lk");
1358  LKS = C.getArgs().MakeArgString(Name.c_str());
1359  } else {
1360  llvm::sys::path::replace_extension(Name, "");
1361  Name = C.getDriver().GetTemporaryPath(Name, "lk");
1362  LKS = C.addTempFile(C.getArgs().MakeArgString(Name.c_str()));
1363  }
1364 
1365  // Add linker script option to the command.
1366  CmdArgs.push_back("-T");
1367  CmdArgs.push_back(LKS);
1368 
1369  // Create a buffer to write the contents of the linker script.
1370  std::string LksBuffer;
1371  llvm::raw_string_ostream LksStream(LksBuffer);
1372 
1373  // Get the HIP offload tool chain.
1374  auto *HIPTC = static_cast<const toolchains::CudaToolChain *>(
1376  assert(HIPTC->getTriple().getArch() == llvm::Triple::amdgcn &&
1377  "Wrong platform");
1378  (void)HIPTC;
1379 
1380  // The output file name needs to persist through the compilation, therefore
1381  // it needs to be created through MakeArgString.
1382  std::string BundleFileName = C.getDriver().GetTemporaryPath("BUNDLE", "hipfb");
1383  const char *BundleFile =
1384  C.addTempFile(C.getArgs().MakeArgString(BundleFileName.c_str()));
1385  AMDGCN::constructHIPFatbinCommand(C, JA, BundleFile, DeviceInputs, Args, T);
1386 
1387  // Add commands to embed target binaries. We ensure that each section and
1388  // image is 16-byte aligned. This is not mandatory, but increases the
1389  // likelihood of data to be aligned with a cache block in several main host
1390  // machines.
1391  LksStream << "/*\n";
1392  LksStream << " HIP Offload Linker Script\n";
1393  LksStream << " *** Automatically generated by Clang ***\n";
1394  LksStream << "*/\n";
1395  LksStream << "TARGET(binary)\n";
1396  LksStream << "INPUT(" << BundleFileName << ")\n";
1397  LksStream << "SECTIONS\n";
1398  LksStream << "{\n";
1399  LksStream << " .hip_fatbin :\n";
1400  LksStream << " ALIGN(0x10)\n";
1401  LksStream << " {\n";
1402  LksStream << " PROVIDE_HIDDEN(__hip_fatbin = .);\n";
1403  LksStream << " " << BundleFileName << "\n";
1404  LksStream << " }\n";
1405  LksStream << "}\n";
1406  LksStream << "INSERT BEFORE .data\n";
1407  LksStream.flush();
1408 
1409  // Dump the contents of the linker script if the user requested that. We
1410  // support this option to enable testing of behavior with -###.
1411  if (C.getArgs().hasArg(options::OPT_fhip_dump_offload_linker_script))
1412  llvm::errs() << LksBuffer;
1413 
1414  // If this is a dry run, do not create the linker script file.
1415  if (C.getArgs().hasArg(options::OPT__HASH_HASH_HASH))
1416  return;
1417 
1418  // Open script file and write the contents.
1419  std::error_code EC;
1420  llvm::raw_fd_ostream Lksf(LKS, EC, llvm::sys::fs::F_None);
1421 
1422  if (EC) {
1423  C.getDriver().Diag(clang::diag::err_unable_to_make_temp) << EC.message();
1424  return;
1425  }
1426 
1427  Lksf << LksBuffer;
1428 }
1429 
1430 SmallString<128> tools::getStatsFileName(const llvm::opt::ArgList &Args,
1431  const InputInfo &Output,
1432  const InputInfo &Input,
1433  const Driver &D) {
1434  const Arg *A = Args.getLastArg(options::OPT_save_stats_EQ);
1435  if (!A)
1436  return {};
1437 
1438  StringRef SaveStats = A->getValue();
1439  SmallString<128> StatsFile;
1440  if (SaveStats == "obj" && Output.isFilename()) {
1441  StatsFile.assign(Output.getFilename());
1442  llvm::sys::path::remove_filename(StatsFile);
1443  } else if (SaveStats != "cwd") {
1444  D.Diag(diag::err_drv_invalid_value) << A->getAsString(Args) << SaveStats;
1445  return {};
1446  }
1447 
1448  StringRef BaseName = llvm::sys::path::filename(Input.getBaseInput());
1449  llvm::sys::path::append(StatsFile, BaseName);
1450  llvm::sys::path::replace_extension(StatsFile, "stats");
1451  return StatsFile;
1452 }
void handleTargetFeaturesGroup(const llvm::opt::ArgList &Args, std::vector< StringRef > &Features, llvm::opt::OptSpecifier Group)
SmallVector< std::string, 16 > path_list
Definition: ToolChain.h:89
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:539
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:785
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:4400
const char * getCompilerRTArgString(const llvm::opt::ArgList &Args, StringRef Component, bool Shared=false) const
Definition: ToolChain.cpp:392
bool isUseSeparateSections(const llvm::Triple &Triple)
Definition: CommonArgs.cpp:372
Defines types useful for describing an Objective-C runtime.
const XRayArgs & getXRayArgs() const
Definition: ToolChain.cpp:122
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:202
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:527
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:120
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:543
Action - Represent an abstract compilation step to perform.
Definition: Action.h:48
std::string getTripleString() const
Definition: ToolChain.h:209
static std::string getNios2TargetCPU(const ArgList &Args)
Definition: CommonArgs.cpp:223
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)
bool isDeviceOffloading(OffloadKind OKind) const
Definition: Action.h:205
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:58
An unknown OpenMP runtime.
Definition: Driver.h:91
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)
llvm::vfs::FileSystem & getVFS() const
Definition: Driver.h:300
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
void constructHIPFatbinCommand(Compilation &C, const JobAction &JA, StringRef OutputFileName, const InputInfoList &Inputs, const llvm::opt::ArgList &TCArgs, const Tool &T)
Definition: HIP.cpp:189
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:246
virtual bool isPICDefault() const =0
Test whether this toolchain defaults to PIC.
const llvm::Triple & getEffectiveTriple() const
Get the toolchain&#39;s effective clang triple.
Definition: ToolChain.h:214
Defines version macros and version-related utility functions for Clang.
static const StringRef GetTargetCPUVersion(const llvm::opt::ArgList &Args)
Definition: Hexagon.cpp:575
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:365
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:200
const llvm::opt::DerivedArgList & getArgs() const
Definition: Compilation.h:187
const Driver & getDriver() const
Definition: ToolChain.h:184
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 isSaveTempsEnabled() const
Definition: Driver.h:328
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:471
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:660
llvm::vfs::FileSystem & getVFS() const
Definition: ToolChain.cpp:102
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
The GNU OpenMP runtime.
Definition: Driver.h:100
const SanitizerArgs & getSanitizerArgs() const
Definition: ToolChain.cpp:116
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:238
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:46
const Driver & getDriver() const
Definition: Compilation.h:134
const llvm::Triple & getTriple() const
Definition: ToolChain.h:186
std::string getArchSpecificLibPath() const
Definition: ToolChain.cpp:398
std::string GetProgramPath(const char *Name) const
Definition: ToolChain.cpp:431
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:207
void addPathIfExists(const Driver &D, const Twine &Path, ToolChain::path_list &Paths)
Definition: CommonArgs.cpp:62
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:475
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 CCCIsCC() const
Whether the driver should follow gcc like behavior.
Definition: Driver.h:179
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:589
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:757
ToolChain - Access to tools for a single platform.
Definition: ToolChain.h:87