clang  8.0.0
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 getLanaiTargetCPU(const ArgList &Args) {
224  if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
225  return A->getValue();
226  }
227  return "";
228 }
229 
230 /// Get the (LLVM) name of the WebAssembly cpu we are targeting.
231 static StringRef getWebAssemblyTargetCPU(const ArgList &Args) {
232  // If we have -mcpu=, use that.
233  if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
234  StringRef CPU = A->getValue();
235 
236 #ifdef __wasm__
237  // Handle "native" by examining the host. "native" isn't meaningful when
238  // cross compiling, so only support this when the host is also WebAssembly.
239  if (CPU == "native")
240  return llvm::sys::getHostCPUName();
241 #endif
242 
243  return CPU;
244  }
245 
246  return "generic";
247 }
248 
249 std::string tools::getCPUName(const ArgList &Args, const llvm::Triple &T,
250  bool FromAs) {
251  Arg *A;
252 
253  switch (T.getArch()) {
254  default:
255  return "";
256 
257  case llvm::Triple::aarch64:
258  case llvm::Triple::aarch64_be:
259  return aarch64::getAArch64TargetCPU(Args, T, A);
260 
261  case llvm::Triple::arm:
262  case llvm::Triple::armeb:
263  case llvm::Triple::thumb:
264  case llvm::Triple::thumbeb: {
265  StringRef MArch, MCPU;
266  arm::getARMArchCPUFromArgs(Args, MArch, MCPU, FromAs);
267  return arm::getARMTargetCPU(MCPU, MArch, T);
268  }
269 
270  case llvm::Triple::avr:
271  if (const Arg *A = Args.getLastArg(options::OPT_mmcu_EQ))
272  return A->getValue();
273  return "";
274 
275  case llvm::Triple::mips:
276  case llvm::Triple::mipsel:
277  case llvm::Triple::mips64:
278  case llvm::Triple::mips64el: {
279  StringRef CPUName;
280  StringRef ABIName;
281  mips::getMipsCPUAndABI(Args, T, CPUName, ABIName);
282  return CPUName;
283  }
284 
285  case llvm::Triple::nvptx:
286  case llvm::Triple::nvptx64:
287  if (const Arg *A = Args.getLastArg(options::OPT_march_EQ))
288  return A->getValue();
289  return "";
290 
291  case llvm::Triple::ppc:
292  case llvm::Triple::ppc64:
293  case llvm::Triple::ppc64le: {
294  std::string TargetCPUName = ppc::getPPCTargetCPU(Args);
295  // LLVM may default to generating code for the native CPU,
296  // but, like gcc, we default to a more generic option for
297  // each architecture. (except on Darwin)
298  if (TargetCPUName.empty() && !T.isOSDarwin()) {
299  if (T.getArch() == llvm::Triple::ppc64)
300  TargetCPUName = "ppc64";
301  else if (T.getArch() == llvm::Triple::ppc64le)
302  TargetCPUName = "ppc64le";
303  else
304  TargetCPUName = "ppc";
305  }
306  return TargetCPUName;
307  }
308 
309  case llvm::Triple::bpfel:
310  case llvm::Triple::bpfeb:
311  case llvm::Triple::sparc:
312  case llvm::Triple::sparcel:
313  case llvm::Triple::sparcv9:
314  if (const Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
315  return A->getValue();
316  return "";
317 
318  case llvm::Triple::x86:
319  case llvm::Triple::x86_64:
320  return x86::getX86TargetCPU(Args, T);
321 
322  case llvm::Triple::hexagon:
323  return "hexagon" +
325 
326  case llvm::Triple::lanai:
327  return getLanaiTargetCPU(Args);
328 
329  case llvm::Triple::systemz:
330  return systemz::getSystemZTargetCPU(Args);
331 
332  case llvm::Triple::r600:
333  case llvm::Triple::amdgcn:
334  return getR600TargetGPU(Args);
335 
336  case llvm::Triple::wasm32:
337  case llvm::Triple::wasm64:
338  return getWebAssemblyTargetCPU(Args);
339  }
340 }
341 
342 unsigned tools::getLTOParallelism(const ArgList &Args, const Driver &D) {
343  unsigned Parallelism = 0;
344  Arg *LtoJobsArg = Args.getLastArg(options::OPT_flto_jobs_EQ);
345  if (LtoJobsArg &&
346  StringRef(LtoJobsArg->getValue()).getAsInteger(10, Parallelism))
347  D.Diag(diag::err_drv_invalid_int_value) << LtoJobsArg->getAsString(Args)
348  << LtoJobsArg->getValue();
349  return Parallelism;
350 }
351 
352 // CloudABI uses -ffunction-sections and -fdata-sections by default.
353 bool tools::isUseSeparateSections(const llvm::Triple &Triple) {
354  return Triple.getOS() == llvm::Triple::CloudABI;
355 }
356 
357 void tools::AddGoldPlugin(const ToolChain &ToolChain, const ArgList &Args,
358  ArgStringList &CmdArgs, const InputInfo &Output,
359  const InputInfo &Input, bool IsThinLTO) {
360  // Tell the linker to load the plugin. This has to come before AddLinkerInputs
361  // as gold requires -plugin to come before any -plugin-opt that -Wl might
362  // forward.
363  CmdArgs.push_back("-plugin");
364 
365 #if defined(_WIN32)
366  const char *Suffix = ".dll";
367 #elif defined(__APPLE__)
368  const char *Suffix = ".dylib";
369 #else
370  const char *Suffix = ".so";
371 #endif
372 
373  SmallString<1024> Plugin;
374  llvm::sys::path::native(Twine(ToolChain.getDriver().Dir) +
375  "/../lib" CLANG_LIBDIR_SUFFIX "/LLVMgold" +
376  Suffix,
377  Plugin);
378  CmdArgs.push_back(Args.MakeArgString(Plugin));
379 
380  // Try to pass driver level flags relevant to LTO code generation down to
381  // the plugin.
382 
383  // Handle flags for selecting CPU variants.
384  std::string CPU = getCPUName(Args, ToolChain.getTriple());
385  if (!CPU.empty())
386  CmdArgs.push_back(Args.MakeArgString(Twine("-plugin-opt=mcpu=") + CPU));
387 
388  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
389  StringRef OOpt;
390  if (A->getOption().matches(options::OPT_O4) ||
391  A->getOption().matches(options::OPT_Ofast))
392  OOpt = "3";
393  else if (A->getOption().matches(options::OPT_O))
394  OOpt = A->getValue();
395  else if (A->getOption().matches(options::OPT_O0))
396  OOpt = "0";
397  if (!OOpt.empty())
398  CmdArgs.push_back(Args.MakeArgString(Twine("-plugin-opt=O") + OOpt));
399  }
400 
401  if (Args.hasArg(options::OPT_gsplit_dwarf)) {
402  CmdArgs.push_back(
403  Args.MakeArgString(Twine("-plugin-opt=dwo_dir=") +
404  Output.getFilename() + "_dwo"));
405  }
406 
407  if (IsThinLTO)
408  CmdArgs.push_back("-plugin-opt=thinlto");
409 
410  if (unsigned Parallelism = getLTOParallelism(Args, ToolChain.getDriver()))
411  CmdArgs.push_back(
412  Args.MakeArgString("-plugin-opt=jobs=" + Twine(Parallelism)));
413 
414  // If an explicit debugger tuning argument appeared, pass it along.
415  if (Arg *A = Args.getLastArg(options::OPT_gTune_Group,
416  options::OPT_ggdbN_Group)) {
417  if (A->getOption().matches(options::OPT_glldb))
418  CmdArgs.push_back("-plugin-opt=-debugger-tune=lldb");
419  else if (A->getOption().matches(options::OPT_gsce))
420  CmdArgs.push_back("-plugin-opt=-debugger-tune=sce");
421  else
422  CmdArgs.push_back("-plugin-opt=-debugger-tune=gdb");
423  }
424 
425  bool UseSeparateSections =
427 
428  if (Args.hasFlag(options::OPT_ffunction_sections,
429  options::OPT_fno_function_sections, UseSeparateSections)) {
430  CmdArgs.push_back("-plugin-opt=-function-sections");
431  }
432 
433  if (Args.hasFlag(options::OPT_fdata_sections, options::OPT_fno_data_sections,
434  UseSeparateSections)) {
435  CmdArgs.push_back("-plugin-opt=-data-sections");
436  }
437 
438  if (Arg *A = getLastProfileSampleUseArg(Args)) {
439  StringRef FName = A->getValue();
440  if (!llvm::sys::fs::exists(FName))
441  ToolChain.getDriver().Diag(diag::err_drv_no_such_file) << FName;
442  else
443  CmdArgs.push_back(
444  Args.MakeArgString(Twine("-plugin-opt=sample-profile=") + FName));
445  }
446 
447  // Need this flag to turn on new pass manager via Gold plugin.
448  if (Args.hasFlag(options::OPT_fexperimental_new_pass_manager,
449  options::OPT_fno_experimental_new_pass_manager,
450  /* Default */ ENABLE_EXPERIMENTAL_NEW_PASS_MANAGER)) {
451  CmdArgs.push_back("-plugin-opt=new-pass-manager");
452  }
453 
454  // Setup statistics file output.
455  SmallString<128> StatsFile =
456  getStatsFileName(Args, Output, Input, ToolChain.getDriver());
457  if (!StatsFile.empty())
458  CmdArgs.push_back(
459  Args.MakeArgString(Twine("-plugin-opt=stats-file=") + StatsFile));
460 }
461 
462 void tools::addArchSpecificRPath(const ToolChain &TC, const ArgList &Args,
463  ArgStringList &CmdArgs) {
464  if (!Args.hasFlag(options::OPT_frtlib_add_rpath,
465  options::OPT_fno_rtlib_add_rpath, false))
466  return;
467 
468  std::string CandidateRPath = TC.getArchSpecificLibPath();
469  if (TC.getVFS().exists(CandidateRPath)) {
470  CmdArgs.push_back("-rpath");
471  CmdArgs.push_back(Args.MakeArgString(CandidateRPath.c_str()));
472  }
473 }
474 
475 bool tools::addOpenMPRuntime(ArgStringList &CmdArgs, const ToolChain &TC,
476  const ArgList &Args, bool IsOffloadingHost,
477  bool GompNeedsRT) {
478  if (!Args.hasFlag(options::OPT_fopenmp, options::OPT_fopenmp_EQ,
479  options::OPT_fno_openmp, false))
480  return false;
481 
482  switch (TC.getDriver().getOpenMPRuntime(Args)) {
483  case Driver::OMPRT_OMP:
484  CmdArgs.push_back("-lomp");
485  break;
486  case Driver::OMPRT_GOMP:
487  CmdArgs.push_back("-lgomp");
488 
489  if (GompNeedsRT)
490  CmdArgs.push_back("-lrt");
491  break;
492  case Driver::OMPRT_IOMP5:
493  CmdArgs.push_back("-liomp5");
494  break;
496  // Already diagnosed.
497  return false;
498  }
499 
500  if (IsOffloadingHost)
501  CmdArgs.push_back("-lomptarget");
502 
503  addArchSpecificRPath(TC, Args, CmdArgs);
504 
505  return true;
506 }
507 
508 static void addSanitizerRuntime(const ToolChain &TC, const ArgList &Args,
509  ArgStringList &CmdArgs, StringRef Sanitizer,
510  bool IsShared, bool IsWhole) {
511  // Wrap any static runtimes that must be forced into executable in
512  // whole-archive.
513  if (IsWhole) CmdArgs.push_back("--whole-archive");
514  CmdArgs.push_back(TC.getCompilerRTArgString(Args, Sanitizer, IsShared));
515  if (IsWhole) CmdArgs.push_back("--no-whole-archive");
516 
517  if (IsShared) {
518  addArchSpecificRPath(TC, Args, CmdArgs);
519  }
520 }
521 
522 // Tries to use a file with the list of dynamic symbols that need to be exported
523 // from the runtime library. Returns true if the file was found.
524 static bool addSanitizerDynamicList(const ToolChain &TC, const ArgList &Args,
525  ArgStringList &CmdArgs,
526  StringRef Sanitizer) {
527  // Solaris ld defaults to --export-dynamic behaviour but doesn't support
528  // the option, so don't try to pass it.
529  if (TC.getTriple().getOS() == llvm::Triple::Solaris)
530  return true;
531  // Myriad is static linking only. Furthermore, some versions of its
532  // linker have the bug where --export-dynamic overrides -static, so
533  // don't use --export-dynamic on that platform.
534  if (TC.getTriple().getVendor() == llvm::Triple::Myriad)
535  return true;
536  SmallString<128> SanRT(TC.getCompilerRT(Args, Sanitizer));
537  if (llvm::sys::fs::exists(SanRT + ".syms")) {
538  CmdArgs.push_back(Args.MakeArgString("--dynamic-list=" + SanRT + ".syms"));
539  return true;
540  }
541  return false;
542 }
543 
544 static void addSanitizerLibPath(const ToolChain &TC, const ArgList &Args,
545  ArgStringList &CmdArgs, StringRef Name) {
546  for (const auto &LibPath : TC.getLibraryPaths()) {
547  if (!LibPath.empty()) {
548  SmallString<128> P(LibPath);
549  llvm::sys::path::append(P, Name);
550  if (TC.getVFS().exists(P))
551  CmdArgs.push_back(Args.MakeArgString(StringRef("-L") + P));
552  }
553  }
554 }
555 
556 void tools::addSanitizerPathLibArgs(const ToolChain &TC, const ArgList &Args,
557  ArgStringList &CmdArgs) {
558  const SanitizerArgs &SanArgs = TC.getSanitizerArgs();
559  if (SanArgs.needsAsanRt()) {
560  addSanitizerLibPath(TC, Args, CmdArgs, "asan");
561  }
562  if (SanArgs.needsHwasanRt()) {
563  addSanitizerLibPath(TC, Args, CmdArgs, "hwasan");
564  }
565  if (SanArgs.needsLsanRt()) {
566  addSanitizerLibPath(TC, Args, CmdArgs, "lsan");
567  }
568  if (SanArgs.needsMsanRt()) {
569  addSanitizerLibPath(TC, Args, CmdArgs, "msan");
570  }
571  if (SanArgs.needsTsanRt()) {
572  addSanitizerLibPath(TC, Args, CmdArgs, "tsan");
573  }
574 }
575 
576 
577 
578 void tools::linkSanitizerRuntimeDeps(const ToolChain &TC,
579  ArgStringList &CmdArgs) {
580  // Force linking against the system libraries sanitizers depends on
581  // (see PR15823 why this is necessary).
582  CmdArgs.push_back("--no-as-needed");
583  // There's no libpthread or librt on RTEMS & Android.
584  if (TC.getTriple().getOS() != llvm::Triple::RTEMS &&
585  !TC.getTriple().isAndroid()) {
586  CmdArgs.push_back("-lpthread");
587  if (!TC.getTriple().isOSOpenBSD())
588  CmdArgs.push_back("-lrt");
589  }
590  CmdArgs.push_back("-lm");
591  // There's no libdl on all OSes.
592  if (!TC.getTriple().isOSFreeBSD() &&
593  !TC.getTriple().isOSNetBSD() &&
594  !TC.getTriple().isOSOpenBSD() &&
595  TC.getTriple().getOS() != llvm::Triple::RTEMS)
596  CmdArgs.push_back("-ldl");
597  // Required for backtrace on some OSes
598  if (TC.getTriple().isOSFreeBSD() ||
599  TC.getTriple().isOSNetBSD())
600  CmdArgs.push_back("-lexecinfo");
601 }
602 
603 static void
604 collectSanitizerRuntimes(const ToolChain &TC, const ArgList &Args,
605  SmallVectorImpl<StringRef> &SharedRuntimes,
606  SmallVectorImpl<StringRef> &StaticRuntimes,
607  SmallVectorImpl<StringRef> &NonWholeStaticRuntimes,
608  SmallVectorImpl<StringRef> &HelperStaticRuntimes,
609  SmallVectorImpl<StringRef> &RequiredSymbols) {
610  const SanitizerArgs &SanArgs = TC.getSanitizerArgs();
611  // Collect shared runtimes.
612  if (SanArgs.needsSharedRt()) {
613  if (SanArgs.needsAsanRt()) {
614  SharedRuntimes.push_back("asan");
615  if (!Args.hasArg(options::OPT_shared) && !TC.getTriple().isAndroid())
616  HelperStaticRuntimes.push_back("asan-preinit");
617  }
618  if (SanArgs.needsUbsanRt()) {
619  if (SanArgs.requiresMinimalRuntime())
620  SharedRuntimes.push_back("ubsan_minimal");
621  else
622  SharedRuntimes.push_back("ubsan_standalone");
623  }
624  if (SanArgs.needsScudoRt()) {
625  if (SanArgs.requiresMinimalRuntime())
626  SharedRuntimes.push_back("scudo_minimal");
627  else
628  SharedRuntimes.push_back("scudo");
629  }
630  if (SanArgs.needsHwasanRt())
631  SharedRuntimes.push_back("hwasan");
632  }
633 
634  // The stats_client library is also statically linked into DSOs.
635  if (SanArgs.needsStatsRt())
636  StaticRuntimes.push_back("stats_client");
637 
638  // Collect static runtimes.
639  if (Args.hasArg(options::OPT_shared) || SanArgs.needsSharedRt()) {
640  // Don't link static runtimes into DSOs or if -shared-libasan.
641  return;
642  }
643  if (SanArgs.needsAsanRt()) {
644  StaticRuntimes.push_back("asan");
645  if (SanArgs.linkCXXRuntimes())
646  StaticRuntimes.push_back("asan_cxx");
647  }
648 
649  if (SanArgs.needsHwasanRt()) {
650  StaticRuntimes.push_back("hwasan");
651  if (SanArgs.linkCXXRuntimes())
652  StaticRuntimes.push_back("hwasan_cxx");
653  }
654  if (SanArgs.needsDfsanRt())
655  StaticRuntimes.push_back("dfsan");
656  if (SanArgs.needsLsanRt())
657  StaticRuntimes.push_back("lsan");
658  if (SanArgs.needsMsanRt()) {
659  StaticRuntimes.push_back("msan");
660  if (SanArgs.linkCXXRuntimes())
661  StaticRuntimes.push_back("msan_cxx");
662  }
663  if (SanArgs.needsTsanRt()) {
664  StaticRuntimes.push_back("tsan");
665  if (SanArgs.linkCXXRuntimes())
666  StaticRuntimes.push_back("tsan_cxx");
667  }
668  if (SanArgs.needsUbsanRt()) {
669  if (SanArgs.requiresMinimalRuntime()) {
670  StaticRuntimes.push_back("ubsan_minimal");
671  } else {
672  StaticRuntimes.push_back("ubsan_standalone");
673  if (SanArgs.linkCXXRuntimes())
674  StaticRuntimes.push_back("ubsan_standalone_cxx");
675  }
676  }
677  if (SanArgs.needsSafeStackRt()) {
678  NonWholeStaticRuntimes.push_back("safestack");
679  RequiredSymbols.push_back("__safestack_init");
680  }
681  if (SanArgs.needsCfiRt())
682  StaticRuntimes.push_back("cfi");
683  if (SanArgs.needsCfiDiagRt()) {
684  StaticRuntimes.push_back("cfi_diag");
685  if (SanArgs.linkCXXRuntimes())
686  StaticRuntimes.push_back("ubsan_standalone_cxx");
687  }
688  if (SanArgs.needsStatsRt()) {
689  NonWholeStaticRuntimes.push_back("stats");
690  RequiredSymbols.push_back("__sanitizer_stats_register");
691  }
692  if (SanArgs.needsEsanRt())
693  StaticRuntimes.push_back("esan");
694  if (SanArgs.needsScudoRt()) {
695  if (SanArgs.requiresMinimalRuntime()) {
696  StaticRuntimes.push_back("scudo_minimal");
697  if (SanArgs.linkCXXRuntimes())
698  StaticRuntimes.push_back("scudo_cxx_minimal");
699  } else {
700  StaticRuntimes.push_back("scudo");
701  if (SanArgs.linkCXXRuntimes())
702  StaticRuntimes.push_back("scudo_cxx");
703  }
704  }
705 }
706 
707 // Should be called before we add system libraries (C++ ABI, libstdc++/libc++,
708 // C runtime, etc). Returns true if sanitizer system deps need to be linked in.
709 bool tools::addSanitizerRuntimes(const ToolChain &TC, const ArgList &Args,
710  ArgStringList &CmdArgs) {
711  SmallVector<StringRef, 4> SharedRuntimes, StaticRuntimes,
712  NonWholeStaticRuntimes, HelperStaticRuntimes, RequiredSymbols;
713  collectSanitizerRuntimes(TC, Args, SharedRuntimes, StaticRuntimes,
714  NonWholeStaticRuntimes, HelperStaticRuntimes,
715  RequiredSymbols);
716 
717  // Inject libfuzzer dependencies.
718  if (TC.getSanitizerArgs().needsFuzzer()
719  && !Args.hasArg(options::OPT_shared)) {
720 
721  addSanitizerRuntime(TC, Args, CmdArgs, "fuzzer", false, true);
722  if (!Args.hasArg(clang::driver::options::OPT_nostdlibxx))
723  TC.AddCXXStdlibLibArgs(Args, CmdArgs);
724  }
725 
726  for (auto RT : SharedRuntimes)
727  addSanitizerRuntime(TC, Args, CmdArgs, RT, true, false);
728  for (auto RT : HelperStaticRuntimes)
729  addSanitizerRuntime(TC, Args, CmdArgs, RT, false, true);
730  bool AddExportDynamic = false;
731  for (auto RT : StaticRuntimes) {
732  addSanitizerRuntime(TC, Args, CmdArgs, RT, false, true);
733  AddExportDynamic |= !addSanitizerDynamicList(TC, Args, CmdArgs, RT);
734  }
735  for (auto RT : NonWholeStaticRuntimes) {
736  addSanitizerRuntime(TC, Args, CmdArgs, RT, false, false);
737  AddExportDynamic |= !addSanitizerDynamicList(TC, Args, CmdArgs, RT);
738  }
739  for (auto S : RequiredSymbols) {
740  CmdArgs.push_back("-u");
741  CmdArgs.push_back(Args.MakeArgString(S));
742  }
743  // If there is a static runtime with no dynamic list, force all the symbols
744  // to be dynamic to be sure we export sanitizer interface functions.
745  if (AddExportDynamic)
746  CmdArgs.push_back("--export-dynamic");
747 
748  const SanitizerArgs &SanArgs = TC.getSanitizerArgs();
749  if (SanArgs.hasCrossDsoCfi() && !AddExportDynamic)
750  CmdArgs.push_back("-export-dynamic-symbol=__cfi_check");
751 
752  return !StaticRuntimes.empty() || !NonWholeStaticRuntimes.empty();
753 }
754 
755 bool tools::addXRayRuntime(const ToolChain&TC, const ArgList &Args, ArgStringList &CmdArgs) {
756  if (Args.hasArg(options::OPT_shared))
757  return false;
758 
759  if (TC.getXRayArgs().needsXRayRt()) {
760  CmdArgs.push_back("-whole-archive");
761  CmdArgs.push_back(TC.getCompilerRTArgString(Args, "xray", false));
762  for (const auto &Mode : TC.getXRayArgs().modeList())
763  CmdArgs.push_back(TC.getCompilerRTArgString(Args, Mode, false));
764  CmdArgs.push_back("-no-whole-archive");
765  return true;
766  }
767 
768  return false;
769 }
770 
771 void tools::linkXRayRuntimeDeps(const ToolChain &TC, ArgStringList &CmdArgs) {
772  CmdArgs.push_back("--no-as-needed");
773  CmdArgs.push_back("-lpthread");
774  if (!TC.getTriple().isOSOpenBSD())
775  CmdArgs.push_back("-lrt");
776  CmdArgs.push_back("-lm");
777 
778  if (!TC.getTriple().isOSFreeBSD() &&
779  !TC.getTriple().isOSNetBSD() &&
780  !TC.getTriple().isOSOpenBSD())
781  CmdArgs.push_back("-ldl");
782 }
783 
784 bool tools::areOptimizationsEnabled(const ArgList &Args) {
785  // Find the last -O arg and see if it is non-zero.
786  if (Arg *A = Args.getLastArg(options::OPT_O_Group))
787  return !A->getOption().matches(options::OPT_O0);
788  // Defaults to -O0.
789  return false;
790 }
791 
792 const char *tools::SplitDebugName(const ArgList &Args,
793  const InputInfo &Output) {
794  SmallString<128> F(Output.isFilename()
795  ? Output.getFilename()
796  : llvm::sys::path::stem(Output.getBaseInput()));
797 
798  if (Arg *A = Args.getLastArg(options::OPT_gsplit_dwarf_EQ))
799  if (StringRef(A->getValue()) == "single")
800  return Args.MakeArgString(F);
801 
802  llvm::sys::path::replace_extension(F, "dwo");
803  return Args.MakeArgString(F);
804 }
805 
806 void tools::SplitDebugInfo(const ToolChain &TC, Compilation &C, const Tool &T,
807  const JobAction &JA, const ArgList &Args,
808  const InputInfo &Output, const char *OutFile) {
809  ArgStringList ExtractArgs;
810  ExtractArgs.push_back("--extract-dwo");
811 
812  ArgStringList StripArgs;
813  StripArgs.push_back("--strip-dwo");
814 
815  // Grabbing the output of the earlier compile step.
816  StripArgs.push_back(Output.getFilename());
817  ExtractArgs.push_back(Output.getFilename());
818  ExtractArgs.push_back(OutFile);
819 
820  const char *Exec =
821  Args.MakeArgString(TC.GetProgramPath(CLANG_DEFAULT_OBJCOPY));
822  InputInfo II(types::TY_Object, Output.getFilename(), Output.getFilename());
823 
824  // First extract the dwo sections.
825  C.addCommand(llvm::make_unique<Command>(JA, T, Exec, ExtractArgs, II));
826 
827  // Then remove them from the original .o file.
828  C.addCommand(llvm::make_unique<Command>(JA, T, Exec, StripArgs, II));
829 }
830 
831 // Claim options we don't want to warn if they are unused. We do this for
832 // options that build systems might add but are unused when assembling or only
833 // running the preprocessor for example.
834 void tools::claimNoWarnArgs(const ArgList &Args) {
835  // Don't warn about unused -f(no-)?lto. This can happen when we're
836  // preprocessing, precompiling or assembling.
837  Args.ClaimAllArgs(options::OPT_flto_EQ);
838  Args.ClaimAllArgs(options::OPT_flto);
839  Args.ClaimAllArgs(options::OPT_fno_lto);
840 }
841 
842 Arg *tools::getLastProfileUseArg(const ArgList &Args) {
843  auto *ProfileUseArg = Args.getLastArg(
844  options::OPT_fprofile_instr_use, options::OPT_fprofile_instr_use_EQ,
845  options::OPT_fprofile_use, options::OPT_fprofile_use_EQ,
846  options::OPT_fno_profile_instr_use);
847 
848  if (ProfileUseArg &&
849  ProfileUseArg->getOption().matches(options::OPT_fno_profile_instr_use))
850  ProfileUseArg = nullptr;
851 
852  return ProfileUseArg;
853 }
854 
855 Arg *tools::getLastProfileSampleUseArg(const ArgList &Args) {
856  auto *ProfileSampleUseArg = Args.getLastArg(
857  options::OPT_fprofile_sample_use, options::OPT_fprofile_sample_use_EQ,
858  options::OPT_fauto_profile, options::OPT_fauto_profile_EQ,
859  options::OPT_fno_profile_sample_use, options::OPT_fno_auto_profile);
860 
861  if (ProfileSampleUseArg &&
862  (ProfileSampleUseArg->getOption().matches(
863  options::OPT_fno_profile_sample_use) ||
864  ProfileSampleUseArg->getOption().matches(options::OPT_fno_auto_profile)))
865  return nullptr;
866 
867  return Args.getLastArg(options::OPT_fprofile_sample_use_EQ,
868  options::OPT_fauto_profile_EQ);
869 }
870 
871 /// Parses the various -fpic/-fPIC/-fpie/-fPIE arguments. Then,
872 /// smooshes them together with platform defaults, to decide whether
873 /// this compile should be using PIC mode or not. Returns a tuple of
874 /// (RelocationModel, PICLevel, IsPIE).
875 std::tuple<llvm::Reloc::Model, unsigned, bool>
876 tools::ParsePICArgs(const ToolChain &ToolChain, const ArgList &Args) {
877  const llvm::Triple &EffectiveTriple = ToolChain.getEffectiveTriple();
878  const llvm::Triple &Triple = ToolChain.getTriple();
879 
880  bool PIE = ToolChain.isPIEDefault();
881  bool PIC = PIE || ToolChain.isPICDefault();
882  // The Darwin/MachO default to use PIC does not apply when using -static.
883  if (Triple.isOSBinFormatMachO() && Args.hasArg(options::OPT_static))
884  PIE = PIC = false;
885  bool IsPICLevelTwo = PIC;
886 
887  bool KernelOrKext =
888  Args.hasArg(options::OPT_mkernel, options::OPT_fapple_kext);
889 
890  // Android-specific defaults for PIC/PIE
891  if (Triple.isAndroid()) {
892  switch (Triple.getArch()) {
893  case llvm::Triple::arm:
894  case llvm::Triple::armeb:
895  case llvm::Triple::thumb:
896  case llvm::Triple::thumbeb:
897  case llvm::Triple::aarch64:
898  case llvm::Triple::mips:
899  case llvm::Triple::mipsel:
900  case llvm::Triple::mips64:
901  case llvm::Triple::mips64el:
902  PIC = true; // "-fpic"
903  break;
904 
905  case llvm::Triple::x86:
906  case llvm::Triple::x86_64:
907  PIC = true; // "-fPIC"
908  IsPICLevelTwo = true;
909  break;
910 
911  default:
912  break;
913  }
914  }
915 
916  // OpenBSD-specific defaults for PIE
917  if (Triple.isOSOpenBSD()) {
918  switch (ToolChain.getArch()) {
919  case llvm::Triple::arm:
920  case llvm::Triple::aarch64:
921  case llvm::Triple::mips64:
922  case llvm::Triple::mips64el:
923  case llvm::Triple::x86:
924  case llvm::Triple::x86_64:
925  IsPICLevelTwo = false; // "-fpie"
926  break;
927 
928  case llvm::Triple::ppc:
929  case llvm::Triple::sparc:
930  case llvm::Triple::sparcel:
931  case llvm::Triple::sparcv9:
932  IsPICLevelTwo = true; // "-fPIE"
933  break;
934 
935  default:
936  break;
937  }
938  }
939 
940  // AMDGPU-specific defaults for PIC.
941  if (Triple.getArch() == llvm::Triple::amdgcn)
942  PIC = true;
943 
944  // The last argument relating to either PIC or PIE wins, and no
945  // other argument is used. If the last argument is any flavor of the
946  // '-fno-...' arguments, both PIC and PIE are disabled. Any PIE
947  // option implicitly enables PIC at the same level.
948  Arg *LastPICArg = Args.getLastArg(options::OPT_fPIC, options::OPT_fno_PIC,
949  options::OPT_fpic, options::OPT_fno_pic,
950  options::OPT_fPIE, options::OPT_fno_PIE,
951  options::OPT_fpie, options::OPT_fno_pie);
952  if (Triple.isOSWindows() && LastPICArg &&
953  LastPICArg ==
954  Args.getLastArg(options::OPT_fPIC, options::OPT_fpic,
955  options::OPT_fPIE, options::OPT_fpie)) {
956  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
957  << LastPICArg->getSpelling() << Triple.str();
958  if (Triple.getArch() == llvm::Triple::x86_64)
959  return std::make_tuple(llvm::Reloc::PIC_, 2U, false);
960  return std::make_tuple(llvm::Reloc::Static, 0U, false);
961  }
962 
963  // Check whether the tool chain trumps the PIC-ness decision. If the PIC-ness
964  // is forced, then neither PIC nor PIE flags will have no effect.
965  if (!ToolChain.isPICDefaultForced()) {
966  if (LastPICArg) {
967  Option O = LastPICArg->getOption();
968  if (O.matches(options::OPT_fPIC) || O.matches(options::OPT_fpic) ||
969  O.matches(options::OPT_fPIE) || O.matches(options::OPT_fpie)) {
970  PIE = O.matches(options::OPT_fPIE) || O.matches(options::OPT_fpie);
971  PIC =
972  PIE || O.matches(options::OPT_fPIC) || O.matches(options::OPT_fpic);
973  IsPICLevelTwo =
974  O.matches(options::OPT_fPIE) || O.matches(options::OPT_fPIC);
975  } else {
976  PIE = PIC = false;
977  if (EffectiveTriple.isPS4CPU()) {
978  Arg *ModelArg = Args.getLastArg(options::OPT_mcmodel_EQ);
979  StringRef Model = ModelArg ? ModelArg->getValue() : "";
980  if (Model != "kernel") {
981  PIC = true;
982  ToolChain.getDriver().Diag(diag::warn_drv_ps4_force_pic)
983  << LastPICArg->getSpelling();
984  }
985  }
986  }
987  }
988  }
989 
990  // Introduce a Darwin and PS4-specific hack. If the default is PIC, but the
991  // PIC level would've been set to level 1, force it back to level 2 PIC
992  // instead.
993  if (PIC && (Triple.isOSDarwin() || EffectiveTriple.isPS4CPU()))
994  IsPICLevelTwo |= ToolChain.isPICDefault();
995 
996  // This kernel flags are a trump-card: they will disable PIC/PIE
997  // generation, independent of the argument order.
998  if (KernelOrKext &&
999  ((!EffectiveTriple.isiOS() || EffectiveTriple.isOSVersionLT(6)) &&
1000  !EffectiveTriple.isWatchOS()))
1001  PIC = PIE = false;
1002 
1003  if (Arg *A = Args.getLastArg(options::OPT_mdynamic_no_pic)) {
1004  // This is a very special mode. It trumps the other modes, almost no one
1005  // uses it, and it isn't even valid on any OS but Darwin.
1006  if (!Triple.isOSDarwin())
1007  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
1008  << A->getSpelling() << Triple.str();
1009 
1010  // FIXME: Warn when this flag trumps some other PIC or PIE flag.
1011 
1012  // Only a forced PIC mode can cause the actual compile to have PIC defines
1013  // etc., no flags are sufficient. This behavior was selected to closely
1014  // match that of llvm-gcc and Apple GCC before that.
1015  PIC = ToolChain.isPICDefault() && ToolChain.isPICDefaultForced();
1016 
1017  return std::make_tuple(llvm::Reloc::DynamicNoPIC, PIC ? 2U : 0U, false);
1018  }
1019 
1020  bool EmbeddedPISupported;
1021  switch (Triple.getArch()) {
1022  case llvm::Triple::arm:
1023  case llvm::Triple::armeb:
1024  case llvm::Triple::thumb:
1025  case llvm::Triple::thumbeb:
1026  EmbeddedPISupported = true;
1027  break;
1028  default:
1029  EmbeddedPISupported = false;
1030  break;
1031  }
1032 
1033  bool ROPI = false, RWPI = false;
1034  Arg* LastROPIArg = Args.getLastArg(options::OPT_fropi, options::OPT_fno_ropi);
1035  if (LastROPIArg && LastROPIArg->getOption().matches(options::OPT_fropi)) {
1036  if (!EmbeddedPISupported)
1037  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
1038  << LastROPIArg->getSpelling() << Triple.str();
1039  ROPI = true;
1040  }
1041  Arg *LastRWPIArg = Args.getLastArg(options::OPT_frwpi, options::OPT_fno_rwpi);
1042  if (LastRWPIArg && LastRWPIArg->getOption().matches(options::OPT_frwpi)) {
1043  if (!EmbeddedPISupported)
1044  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
1045  << LastRWPIArg->getSpelling() << Triple.str();
1046  RWPI = true;
1047  }
1048 
1049  // ROPI and RWPI are not compatible with PIC or PIE.
1050  if ((ROPI || RWPI) && (PIC || PIE))
1051  ToolChain.getDriver().Diag(diag::err_drv_ropi_rwpi_incompatible_with_pic);
1052 
1053  if (Triple.isMIPS()) {
1054  StringRef CPUName;
1055  StringRef ABIName;
1056  mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName);
1057  // When targeting the N64 ABI, PIC is the default, except in the case
1058  // when the -mno-abicalls option is used. In that case we exit
1059  // at next check regardless of PIC being set below.
1060  if (ABIName == "n64")
1061  PIC = true;
1062  // When targettng MIPS with -mno-abicalls, it's always static.
1063  if(Args.hasArg(options::OPT_mno_abicalls))
1064  return std::make_tuple(llvm::Reloc::Static, 0U, false);
1065  // Unlike other architectures, MIPS, even with -fPIC/-mxgot/multigot,
1066  // does not use PIC level 2 for historical reasons.
1067  IsPICLevelTwo = false;
1068  }
1069 
1070  if (PIC)
1071  return std::make_tuple(llvm::Reloc::PIC_, IsPICLevelTwo ? 2U : 1U, PIE);
1072 
1073  llvm::Reloc::Model RelocM = llvm::Reloc::Static;
1074  if (ROPI && RWPI)
1075  RelocM = llvm::Reloc::ROPI_RWPI;
1076  else if (ROPI)
1077  RelocM = llvm::Reloc::ROPI;
1078  else if (RWPI)
1079  RelocM = llvm::Reloc::RWPI;
1080 
1081  return std::make_tuple(RelocM, 0U, false);
1082 }
1083 
1084 // `-falign-functions` indicates that the functions should be aligned to a
1085 // 16-byte boundary.
1086 //
1087 // `-falign-functions=1` is the same as `-fno-align-functions`.
1088 //
1089 // The scalar `n` in `-falign-functions=n` must be an integral value between
1090 // [0, 65536]. If the value is not a power-of-two, it will be rounded up to
1091 // the nearest power-of-two.
1092 //
1093 // If we return `0`, the frontend will default to the backend's preferred
1094 // alignment.
1095 //
1096 // NOTE: icc only allows values between [0, 4096]. icc uses `-falign-functions`
1097 // to mean `-falign-functions=16`. GCC defaults to the backend's preferred
1098 // alignment. For unaligned functions, we default to the backend's preferred
1099 // alignment.
1100 unsigned tools::ParseFunctionAlignment(const ToolChain &TC,
1101  const ArgList &Args) {
1102  const Arg *A = Args.getLastArg(options::OPT_falign_functions,
1103  options::OPT_falign_functions_EQ,
1104  options::OPT_fno_align_functions);
1105  if (!A || A->getOption().matches(options::OPT_fno_align_functions))
1106  return 0;
1107 
1108  if (A->getOption().matches(options::OPT_falign_functions))
1109  return 0;
1110 
1111  unsigned Value = 0;
1112  if (StringRef(A->getValue()).getAsInteger(10, Value) || Value > 65536)
1113  TC.getDriver().Diag(diag::err_drv_invalid_int_value)
1114  << A->getAsString(Args) << A->getValue();
1115  return Value ? llvm::Log2_32_Ceil(std::min(Value, 65536u)) : Value;
1116 }
1117 
1118 void tools::AddAssemblerKPIC(const ToolChain &ToolChain, const ArgList &Args,
1119  ArgStringList &CmdArgs) {
1120  llvm::Reloc::Model RelocationModel;
1121  unsigned PICLevel;
1122  bool IsPIE;
1123  std::tie(RelocationModel, PICLevel, IsPIE) = ParsePICArgs(ToolChain, Args);
1124 
1125  if (RelocationModel != llvm::Reloc::Static)
1126  CmdArgs.push_back("-KPIC");
1127 }
1128 
1129 /// Determine whether Objective-C automated reference counting is
1130 /// enabled.
1131 bool tools::isObjCAutoRefCount(const ArgList &Args) {
1132  return Args.hasFlag(options::OPT_fobjc_arc, options::OPT_fno_objc_arc, false);
1133 }
1134 
1135 static void AddLibgcc(const llvm::Triple &Triple, const Driver &D,
1136  ArgStringList &CmdArgs, const ArgList &Args) {
1137  bool isAndroid = Triple.isAndroid();
1138  bool isCygMing = Triple.isOSCygMing();
1139  bool IsIAMCU = Triple.isOSIAMCU();
1140  bool StaticLibgcc = Args.hasArg(options::OPT_static_libgcc) ||
1141  Args.hasArg(options::OPT_static);
1142 
1143  bool SharedLibgcc = Args.hasArg(options::OPT_shared_libgcc);
1144  bool UnspecifiedLibgcc = !StaticLibgcc && !SharedLibgcc;
1145 
1146  // Gcc adds libgcc arguments in various ways:
1147  //
1148  // gcc <none>: -lgcc --as-needed -lgcc_s --no-as-needed
1149  // g++ <none>: -lgcc_s -lgcc
1150  // gcc shared: -lgcc_s -lgcc
1151  // g++ shared: -lgcc_s -lgcc
1152  // gcc static: -lgcc -lgcc_eh
1153  // g++ static: -lgcc -lgcc_eh
1154  //
1155  // Also, certain targets need additional adjustments.
1156 
1157  bool LibGccFirst = (D.CCCIsCC() && UnspecifiedLibgcc) || StaticLibgcc;
1158  if (LibGccFirst)
1159  CmdArgs.push_back("-lgcc");
1160 
1161  bool AsNeeded = D.CCCIsCC() && UnspecifiedLibgcc && !isAndroid && !isCygMing;
1162  if (AsNeeded)
1163  CmdArgs.push_back("--as-needed");
1164 
1165  if ((UnspecifiedLibgcc || SharedLibgcc) && !isAndroid)
1166  CmdArgs.push_back("-lgcc_s");
1167 
1168  else if (StaticLibgcc && !isAndroid && !IsIAMCU)
1169  CmdArgs.push_back("-lgcc_eh");
1170 
1171  if (AsNeeded)
1172  CmdArgs.push_back("--no-as-needed");
1173 
1174  if (!LibGccFirst)
1175  CmdArgs.push_back("-lgcc");
1176 
1177  // According to Android ABI, we have to link with libdl if we are
1178  // linking with non-static libgcc.
1179  //
1180  // NOTE: This fixes a link error on Android MIPS as well. The non-static
1181  // libgcc for MIPS relies on _Unwind_Find_FDE and dl_iterate_phdr from libdl.
1182  if (isAndroid && !StaticLibgcc)
1183  CmdArgs.push_back("-ldl");
1184 }
1185 
1186 void tools::AddRunTimeLibs(const ToolChain &TC, const Driver &D,
1187  ArgStringList &CmdArgs, const ArgList &Args) {
1188  // Make use of compiler-rt if --rtlib option is used
1190 
1191  switch (RLT) {
1193  CmdArgs.push_back(TC.getCompilerRTArgString(Args, "builtins"));
1194  break;
1195  case ToolChain::RLT_Libgcc:
1196  // Make sure libgcc is not used under MSVC environment by default
1197  if (TC.getTriple().isKnownWindowsMSVCEnvironment()) {
1198  // Issue error diagnostic if libgcc is explicitly specified
1199  // through command line as --rtlib option argument.
1200  if (Args.hasArg(options::OPT_rtlib_EQ)) {
1201  TC.getDriver().Diag(diag::err_drv_unsupported_rtlib_for_platform)
1202  << Args.getLastArg(options::OPT_rtlib_EQ)->getValue() << "MSVC";
1203  }
1204  } else
1205  AddLibgcc(TC.getTriple(), D, CmdArgs, Args);
1206  break;
1207  }
1208 }
1209 
1210 /// Add OpenMP linker script arguments at the end of the argument list so that
1211 /// the fat binary is built by embedding each of the device images into the
1212 /// host. The linker script also defines a few symbols required by the code
1213 /// generation so that the images can be easily retrieved at runtime by the
1214 /// offloading library. This should be used only in tool chains that support
1215 /// linker scripts.
1216 void tools::AddOpenMPLinkerScript(const ToolChain &TC, Compilation &C,
1217  const InputInfo &Output,
1218  const InputInfoList &Inputs,
1219  const ArgList &Args, ArgStringList &CmdArgs,
1220  const JobAction &JA) {
1221 
1222  // If this is not an OpenMP host toolchain, we don't need to do anything.
1224  return;
1225 
1226  // Create temporary linker script. Keep it if save-temps is enabled.
1227  const char *LKS;
1228  SmallString<256> Name = llvm::sys::path::filename(Output.getFilename());
1229  if (C.getDriver().isSaveTempsEnabled()) {
1230  llvm::sys::path::replace_extension(Name, "lk");
1231  LKS = C.getArgs().MakeArgString(Name.c_str());
1232  } else {
1233  llvm::sys::path::replace_extension(Name, "");
1234  Name = C.getDriver().GetTemporaryPath(Name, "lk");
1235  LKS = C.addTempFile(C.getArgs().MakeArgString(Name.c_str()));
1236  }
1237 
1238  // Add linker script option to the command.
1239  CmdArgs.push_back("-T");
1240  CmdArgs.push_back(LKS);
1241 
1242  // Create a buffer to write the contents of the linker script.
1243  std::string LksBuffer;
1244  llvm::raw_string_ostream LksStream(LksBuffer);
1245 
1246  // Get the OpenMP offload tool chains so that we can extract the triple
1247  // associated with each device input.
1248  auto OpenMPToolChains = C.getOffloadToolChains<Action::OFK_OpenMP>();
1249  assert(OpenMPToolChains.first != OpenMPToolChains.second &&
1250  "No OpenMP toolchains??");
1251 
1252  // Track the input file name and device triple in order to build the script,
1253  // inserting binaries in the designated sections.
1255 
1256  // Add commands to embed target binaries. We ensure that each section and
1257  // image is 16-byte aligned. This is not mandatory, but increases the
1258  // likelihood of data to be aligned with a cache block in several main host
1259  // machines.
1260  LksStream << "/*\n";
1261  LksStream << " OpenMP Offload Linker Script\n";
1262  LksStream << " *** Automatically generated by Clang ***\n";
1263  LksStream << "*/\n";
1264  LksStream << "TARGET(binary)\n";
1265  auto DTC = OpenMPToolChains.first;
1266  for (auto &II : Inputs) {
1267  const Action *A = II.getAction();
1268  // Is this a device linking action?
1269  if (A && isa<LinkJobAction>(A) &&
1271  assert(DTC != OpenMPToolChains.second &&
1272  "More device inputs than device toolchains??");
1273  InputBinaryInfo.push_back(std::make_pair(
1274  DTC->second->getTriple().normalize(), II.getFilename()));
1275  ++DTC;
1276  LksStream << "INPUT(" << II.getFilename() << ")\n";
1277  }
1278  }
1279 
1280  assert(DTC == OpenMPToolChains.second &&
1281  "Less device inputs than device toolchains??");
1282 
1283  LksStream << "SECTIONS\n";
1284  LksStream << "{\n";
1285 
1286  // Put each target binary into a separate section.
1287  for (const auto &BI : InputBinaryInfo) {
1288  LksStream << " .omp_offloading." << BI.first << " :\n";
1289  LksStream << " ALIGN(0x10)\n";
1290  LksStream << " {\n";
1291  LksStream << " PROVIDE_HIDDEN(.omp_offloading.img_start." << BI.first
1292  << " = .);\n";
1293  LksStream << " " << BI.second << "\n";
1294  LksStream << " PROVIDE_HIDDEN(.omp_offloading.img_end." << BI.first
1295  << " = .);\n";
1296  LksStream << " }\n";
1297  }
1298 
1299  // Add commands to define host entries begin and end. We use 1-byte subalign
1300  // so that the linker does not add any padding and the elements in this
1301  // section form an array.
1302  LksStream << " .omp_offloading.entries :\n";
1303  LksStream << " ALIGN(0x10)\n";
1304  LksStream << " SUBALIGN(0x01)\n";
1305  LksStream << " {\n";
1306  LksStream << " PROVIDE_HIDDEN(.omp_offloading.entries_begin = .);\n";
1307  LksStream << " *(.omp_offloading.entries)\n";
1308  LksStream << " PROVIDE_HIDDEN(.omp_offloading.entries_end = .);\n";
1309  LksStream << " }\n";
1310  LksStream << "}\n";
1311  LksStream << "INSERT BEFORE .data\n";
1312  LksStream.flush();
1313 
1314  // Dump the contents of the linker script if the user requested that. We
1315  // support this option to enable testing of behavior with -###.
1316  if (C.getArgs().hasArg(options::OPT_fopenmp_dump_offload_linker_script))
1317  llvm::errs() << LksBuffer;
1318 
1319  // If this is a dry run, do not create the linker script file.
1320  if (C.getArgs().hasArg(options::OPT__HASH_HASH_HASH))
1321  return;
1322 
1323  // Open script file and write the contents.
1324  std::error_code EC;
1325  llvm::raw_fd_ostream Lksf(LKS, EC, llvm::sys::fs::F_None);
1326 
1327  if (EC) {
1328  C.getDriver().Diag(clang::diag::err_unable_to_make_temp) << EC.message();
1329  return;
1330  }
1331 
1332  Lksf << LksBuffer;
1333 }
1334 
1335 /// Add HIP linker script arguments at the end of the argument list so that
1336 /// the fat binary is built by embedding the device images into the host. The
1337 /// linker script also defines a symbol required by the code generation so that
1338 /// the image can be retrieved at runtime. This should be used only in tool
1339 /// chains that support linker scripts.
1340 void tools::AddHIPLinkerScript(const ToolChain &TC, Compilation &C,
1341  const InputInfo &Output,
1342  const InputInfoList &Inputs, const ArgList &Args,
1343  ArgStringList &CmdArgs, const JobAction &JA,
1344  const Tool &T) {
1345 
1346  // If this is not a HIP host toolchain, we don't need to do anything.
1348  return;
1349 
1350  InputInfoList DeviceInputs;
1351  for (const auto &II : Inputs) {
1352  const Action *A = II.getAction();
1353  // Is this a device linking action?
1354  if (A && isa<LinkJobAction>(A) && A->isDeviceOffloading(Action::OFK_HIP)) {
1355  DeviceInputs.push_back(II);
1356  }
1357  }
1358 
1359  if (DeviceInputs.empty())
1360  return;
1361 
1362  // Create temporary linker script. Keep it if save-temps is enabled.
1363  const char *LKS;
1364  SmallString<256> Name = llvm::sys::path::filename(Output.getFilename());
1365  if (C.getDriver().isSaveTempsEnabled()) {
1366  llvm::sys::path::replace_extension(Name, "lk");
1367  LKS = C.getArgs().MakeArgString(Name.c_str());
1368  } else {
1369  llvm::sys::path::replace_extension(Name, "");
1370  Name = C.getDriver().GetTemporaryPath(Name, "lk");
1371  LKS = C.addTempFile(C.getArgs().MakeArgString(Name.c_str()));
1372  }
1373 
1374  // Add linker script option to the command.
1375  CmdArgs.push_back("-T");
1376  CmdArgs.push_back(LKS);
1377 
1378  // Create a buffer to write the contents of the linker script.
1379  std::string LksBuffer;
1380  llvm::raw_string_ostream LksStream(LksBuffer);
1381 
1382  // Get the HIP offload tool chain.
1383  auto *HIPTC = static_cast<const toolchains::CudaToolChain *>(
1385  assert(HIPTC->getTriple().getArch() == llvm::Triple::amdgcn &&
1386  "Wrong platform");
1387  (void)HIPTC;
1388 
1389  // The output file name needs to persist through the compilation, therefore
1390  // it needs to be created through MakeArgString.
1391  std::string BundleFileName = C.getDriver().GetTemporaryPath("BUNDLE", "hipfb");
1392  const char *BundleFile =
1393  C.addTempFile(C.getArgs().MakeArgString(BundleFileName.c_str()));
1394  AMDGCN::constructHIPFatbinCommand(C, JA, BundleFile, DeviceInputs, Args, T);
1395 
1396  // Add commands to embed target binaries. We ensure that each section and
1397  // image is 16-byte aligned. This is not mandatory, but increases the
1398  // likelihood of data to be aligned with a cache block in several main host
1399  // machines.
1400  LksStream << "/*\n";
1401  LksStream << " HIP Offload Linker Script\n";
1402  LksStream << " *** Automatically generated by Clang ***\n";
1403  LksStream << "*/\n";
1404  LksStream << "TARGET(binary)\n";
1405  LksStream << "INPUT(" << BundleFileName << ")\n";
1406  LksStream << "SECTIONS\n";
1407  LksStream << "{\n";
1408  LksStream << " .hip_fatbin :\n";
1409  LksStream << " ALIGN(0x10)\n";
1410  LksStream << " {\n";
1411  LksStream << " PROVIDE_HIDDEN(__hip_fatbin = .);\n";
1412  LksStream << " " << BundleFileName << "\n";
1413  LksStream << " }\n";
1414  LksStream << " /DISCARD/ :\n";
1415  LksStream << " {\n";
1416  LksStream << " * ( __CLANG_OFFLOAD_BUNDLE__* )\n";
1417  LksStream << " }\n";
1418  LksStream << "}\n";
1419  LksStream << "INSERT BEFORE .data\n";
1420  LksStream.flush();
1421 
1422  // Dump the contents of the linker script if the user requested that. We
1423  // support this option to enable testing of behavior with -###.
1424  if (C.getArgs().hasArg(options::OPT_fhip_dump_offload_linker_script))
1425  llvm::errs() << LksBuffer;
1426 
1427  // If this is a dry run, do not create the linker script file.
1428  if (C.getArgs().hasArg(options::OPT__HASH_HASH_HASH))
1429  return;
1430 
1431  // Open script file and write the contents.
1432  std::error_code EC;
1433  llvm::raw_fd_ostream Lksf(LKS, EC, llvm::sys::fs::F_None);
1434 
1435  if (EC) {
1436  C.getDriver().Diag(clang::diag::err_unable_to_make_temp) << EC.message();
1437  return;
1438  }
1439 
1440  Lksf << LksBuffer;
1441 }
1442 
1443 SmallString<128> tools::getStatsFileName(const llvm::opt::ArgList &Args,
1444  const InputInfo &Output,
1445  const InputInfo &Input,
1446  const Driver &D) {
1447  const Arg *A = Args.getLastArg(options::OPT_save_stats_EQ);
1448  if (!A)
1449  return {};
1450 
1451  StringRef SaveStats = A->getValue();
1452  SmallString<128> StatsFile;
1453  if (SaveStats == "obj" && Output.isFilename()) {
1454  StatsFile.assign(Output.getFilename());
1455  llvm::sys::path::remove_filename(StatsFile);
1456  } else if (SaveStats != "cwd") {
1457  D.Diag(diag::err_drv_invalid_value) << A->getAsString(Args) << SaveStats;
1458  return {};
1459  }
1460 
1461  StringRef BaseName = llvm::sys::path::filename(Input.getBaseInput());
1462  llvm::sys::path::append(StatsFile, BaseName);
1463  llvm::sys::path::replace_extension(StatsFile, "stats");
1464  return StatsFile;
1465 }
void handleTargetFeaturesGroup(const llvm::opt::ArgList &Args, std::vector< StringRef > &Features, llvm::opt::OptSpecifier Group)
SmallVector< std::string, 16 > path_list
Definition: ToolChain.h:91
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:550
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:789
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:4471
const char * getCompilerRTArgString(const llvm::opt::ArgList &Args, StringRef Component, bool Shared=false) const
Definition: ToolChain.cpp:392
const char * SplitDebugName(const llvm::opt::ArgList &Args, const InputInfo &Output)
bool isUseSeparateSections(const llvm::Triple &Triple)
Definition: CommonArgs.cpp:353
StringRef P
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:508
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)
void addSanitizerPathLibArgs(const ToolChain &TC, const llvm::opt::ArgList &Args, 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:524
Action - Represent an abstract compilation step to perform.
Definition: Action.h:48
std::string getTripleString() const
Definition: ToolChain.h:211
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:297
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:195
bool requiresMinimalRuntime() const
Definition: SanitizerArgs.h:71
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:231
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:216
Defines version macros and version-related utility functions for Clang.
static const StringRef GetTargetCPUVersion(const llvm::opt::ArgList &Args)
Definition: Hexagon.cpp:576
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.
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)
path_list & getLibraryPaths()
Definition: ToolChain.h:221
void AddAssemblerKPIC(const ToolChain &ToolChain, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs)
llvm::Triple::ArchType getArch() const
Definition: ToolChain.h:202
const llvm::opt::DerivedArgList & getArgs() const
Definition: Compilation.h:187
const Driver & getDriver() const
Definition: ToolChain.h:186
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:325
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:475
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:664
llvm::vfs::FileSystem & getVFS() const
Definition: ToolChain.cpp:102
static void addSanitizerLibPath(const ToolChain &TC, const ArgList &Args, ArgStringList &CmdArgs, StringRef Name)
Definition: CommonArgs.cpp:544
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:223
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:188
std::string getArchSpecificLibPath() const
Definition: ToolChain.cpp:398
std::string GetProgramPath(const char *Name) const
Definition: ToolChain.cpp:435
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:479
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:604
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:761
ToolChain - Access to tools for a single platform.
Definition: ToolChain.h:89