clang  9.0.0svn
Clang.cpp
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1 //===-- Clang.cpp - Clang+LLVM ToolChain Implementations --------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "Clang.h"
10 #include "Arch/AArch64.h"
11 #include "Arch/ARM.h"
12 #include "Arch/Mips.h"
13 #include "Arch/PPC.h"
14 #include "Arch/RISCV.h"
15 #include "Arch/Sparc.h"
16 #include "Arch/SystemZ.h"
17 #include "Arch/X86.h"
18 #include "AMDGPU.h"
19 #include "CommonArgs.h"
20 #include "Hexagon.h"
21 #include "MSP430.h"
22 #include "InputInfo.h"
23 #include "PS4CPU.h"
24 #include "clang/Basic/CharInfo.h"
27 #include "clang/Basic/Version.h"
28 #include "clang/Driver/Distro.h"
30 #include "clang/Driver/Options.h"
32 #include "clang/Driver/XRayArgs.h"
33 #include "llvm/ADT/StringExtras.h"
34 #include "llvm/Config/llvm-config.h"
35 #include "llvm/Option/ArgList.h"
36 #include "llvm/Support/CodeGen.h"
37 #include "llvm/Support/Compression.h"
38 #include "llvm/Support/FileSystem.h"
39 #include "llvm/Support/Path.h"
40 #include "llvm/Support/Process.h"
41 #include "llvm/Support/TargetParser.h"
42 #include "llvm/Support/YAMLParser.h"
43 
44 #ifdef LLVM_ON_UNIX
45 #include <unistd.h> // For getuid().
46 #endif
47 
48 using namespace clang::driver;
49 using namespace clang::driver::tools;
50 using namespace clang;
51 using namespace llvm::opt;
52 
53 static void CheckPreprocessingOptions(const Driver &D, const ArgList &Args) {
54  if (Arg *A =
55  Args.getLastArg(clang::driver::options::OPT_C, options::OPT_CC)) {
56  if (!Args.hasArg(options::OPT_E) && !Args.hasArg(options::OPT__SLASH_P) &&
57  !Args.hasArg(options::OPT__SLASH_EP) && !D.CCCIsCPP()) {
58  D.Diag(clang::diag::err_drv_argument_only_allowed_with)
59  << A->getBaseArg().getAsString(Args)
60  << (D.IsCLMode() ? "/E, /P or /EP" : "-E");
61  }
62  }
63 }
64 
65 static void CheckCodeGenerationOptions(const Driver &D, const ArgList &Args) {
66  // In gcc, only ARM checks this, but it seems reasonable to check universally.
67  if (Args.hasArg(options::OPT_static))
68  if (const Arg *A =
69  Args.getLastArg(options::OPT_dynamic, options::OPT_mdynamic_no_pic))
70  D.Diag(diag::err_drv_argument_not_allowed_with) << A->getAsString(Args)
71  << "-static";
72 }
73 
74 // Add backslashes to escape spaces and other backslashes.
75 // This is used for the space-separated argument list specified with
76 // the -dwarf-debug-flags option.
77 static void EscapeSpacesAndBackslashes(const char *Arg,
78  SmallVectorImpl<char> &Res) {
79  for (; *Arg; ++Arg) {
80  switch (*Arg) {
81  default:
82  break;
83  case ' ':
84  case '\\':
85  Res.push_back('\\');
86  break;
87  }
88  Res.push_back(*Arg);
89  }
90 }
91 
92 // Quote target names for inclusion in GNU Make dependency files.
93 // Only the characters '$', '#', ' ', '\t' are quoted.
94 static void QuoteTarget(StringRef Target, SmallVectorImpl<char> &Res) {
95  for (unsigned i = 0, e = Target.size(); i != e; ++i) {
96  switch (Target[i]) {
97  case ' ':
98  case '\t':
99  // Escape the preceding backslashes
100  for (int j = i - 1; j >= 0 && Target[j] == '\\'; --j)
101  Res.push_back('\\');
102 
103  // Escape the space/tab
104  Res.push_back('\\');
105  break;
106  case '$':
107  Res.push_back('$');
108  break;
109  case '#':
110  Res.push_back('\\');
111  break;
112  default:
113  break;
114  }
115 
116  Res.push_back(Target[i]);
117  }
118 }
119 
120 /// Apply \a Work on the current tool chain \a RegularToolChain and any other
121 /// offloading tool chain that is associated with the current action \a JA.
122 static void
124  const ToolChain &RegularToolChain,
125  llvm::function_ref<void(const ToolChain &)> Work) {
126  // Apply Work on the current/regular tool chain.
127  Work(RegularToolChain);
128 
129  // Apply Work on all the offloading tool chains associated with the current
130  // action.
135  else if (JA.isHostOffloading(Action::OFK_HIP))
137  else if (JA.isDeviceOffloading(Action::OFK_HIP))
139 
142  for (auto II = TCs.first, IE = TCs.second; II != IE; ++II)
143  Work(*II->second);
144  } else if (JA.isDeviceOffloading(Action::OFK_OpenMP))
146 
147  //
148  // TODO: Add support for other offloading programming models here.
149  //
150 }
151 
152 /// This is a helper function for validating the optional refinement step
153 /// parameter in reciprocal argument strings. Return false if there is an error
154 /// parsing the refinement step. Otherwise, return true and set the Position
155 /// of the refinement step in the input string.
156 static bool getRefinementStep(StringRef In, const Driver &D,
157  const Arg &A, size_t &Position) {
158  const char RefinementStepToken = ':';
159  Position = In.find(RefinementStepToken);
160  if (Position != StringRef::npos) {
161  StringRef Option = A.getOption().getName();
162  StringRef RefStep = In.substr(Position + 1);
163  // Allow exactly one numeric character for the additional refinement
164  // step parameter. This is reasonable for all currently-supported
165  // operations and architectures because we would expect that a larger value
166  // of refinement steps would cause the estimate "optimization" to
167  // under-perform the native operation. Also, if the estimate does not
168  // converge quickly, it probably will not ever converge, so further
169  // refinement steps will not produce a better answer.
170  if (RefStep.size() != 1) {
171  D.Diag(diag::err_drv_invalid_value) << Option << RefStep;
172  return false;
173  }
174  char RefStepChar = RefStep[0];
175  if (RefStepChar < '0' || RefStepChar > '9') {
176  D.Diag(diag::err_drv_invalid_value) << Option << RefStep;
177  return false;
178  }
179  }
180  return true;
181 }
182 
183 /// The -mrecip flag requires processing of many optional parameters.
184 static void ParseMRecip(const Driver &D, const ArgList &Args,
185  ArgStringList &OutStrings) {
186  StringRef DisabledPrefixIn = "!";
187  StringRef DisabledPrefixOut = "!";
188  StringRef EnabledPrefixOut = "";
189  StringRef Out = "-mrecip=";
190 
191  Arg *A = Args.getLastArg(options::OPT_mrecip, options::OPT_mrecip_EQ);
192  if (!A)
193  return;
194 
195  unsigned NumOptions = A->getNumValues();
196  if (NumOptions == 0) {
197  // No option is the same as "all".
198  OutStrings.push_back(Args.MakeArgString(Out + "all"));
199  return;
200  }
201 
202  // Pass through "all", "none", or "default" with an optional refinement step.
203  if (NumOptions == 1) {
204  StringRef Val = A->getValue(0);
205  size_t RefStepLoc;
206  if (!getRefinementStep(Val, D, *A, RefStepLoc))
207  return;
208  StringRef ValBase = Val.slice(0, RefStepLoc);
209  if (ValBase == "all" || ValBase == "none" || ValBase == "default") {
210  OutStrings.push_back(Args.MakeArgString(Out + Val));
211  return;
212  }
213  }
214 
215  // Each reciprocal type may be enabled or disabled individually.
216  // Check each input value for validity, concatenate them all back together,
217  // and pass through.
218 
219  llvm::StringMap<bool> OptionStrings;
220  OptionStrings.insert(std::make_pair("divd", false));
221  OptionStrings.insert(std::make_pair("divf", false));
222  OptionStrings.insert(std::make_pair("vec-divd", false));
223  OptionStrings.insert(std::make_pair("vec-divf", false));
224  OptionStrings.insert(std::make_pair("sqrtd", false));
225  OptionStrings.insert(std::make_pair("sqrtf", false));
226  OptionStrings.insert(std::make_pair("vec-sqrtd", false));
227  OptionStrings.insert(std::make_pair("vec-sqrtf", false));
228 
229  for (unsigned i = 0; i != NumOptions; ++i) {
230  StringRef Val = A->getValue(i);
231 
232  bool IsDisabled = Val.startswith(DisabledPrefixIn);
233  // Ignore the disablement token for string matching.
234  if (IsDisabled)
235  Val = Val.substr(1);
236 
237  size_t RefStep;
238  if (!getRefinementStep(Val, D, *A, RefStep))
239  return;
240 
241  StringRef ValBase = Val.slice(0, RefStep);
242  llvm::StringMap<bool>::iterator OptionIter = OptionStrings.find(ValBase);
243  if (OptionIter == OptionStrings.end()) {
244  // Try again specifying float suffix.
245  OptionIter = OptionStrings.find(ValBase.str() + 'f');
246  if (OptionIter == OptionStrings.end()) {
247  // The input name did not match any known option string.
248  D.Diag(diag::err_drv_unknown_argument) << Val;
249  return;
250  }
251  // The option was specified without a float or double suffix.
252  // Make sure that the double entry was not already specified.
253  // The float entry will be checked below.
254  if (OptionStrings[ValBase.str() + 'd']) {
255  D.Diag(diag::err_drv_invalid_value) << A->getOption().getName() << Val;
256  return;
257  }
258  }
259 
260  if (OptionIter->second == true) {
261  // Duplicate option specified.
262  D.Diag(diag::err_drv_invalid_value) << A->getOption().getName() << Val;
263  return;
264  }
265 
266  // Mark the matched option as found. Do not allow duplicate specifiers.
267  OptionIter->second = true;
268 
269  // If the precision was not specified, also mark the double entry as found.
270  if (ValBase.back() != 'f' && ValBase.back() != 'd')
271  OptionStrings[ValBase.str() + 'd'] = true;
272 
273  // Build the output string.
274  StringRef Prefix = IsDisabled ? DisabledPrefixOut : EnabledPrefixOut;
275  Out = Args.MakeArgString(Out + Prefix + Val);
276  if (i != NumOptions - 1)
277  Out = Args.MakeArgString(Out + ",");
278  }
279 
280  OutStrings.push_back(Args.MakeArgString(Out));
281 }
282 
283 /// The -mprefer-vector-width option accepts either a positive integer
284 /// or the string "none".
285 static void ParseMPreferVectorWidth(const Driver &D, const ArgList &Args,
286  ArgStringList &CmdArgs) {
287  Arg *A = Args.getLastArg(options::OPT_mprefer_vector_width_EQ);
288  if (!A)
289  return;
290 
291  StringRef Value = A->getValue();
292  if (Value == "none") {
293  CmdArgs.push_back("-mprefer-vector-width=none");
294  } else {
295  unsigned Width;
296  if (Value.getAsInteger(10, Width)) {
297  D.Diag(diag::err_drv_invalid_value) << A->getOption().getName() << Value;
298  return;
299  }
300  CmdArgs.push_back(Args.MakeArgString("-mprefer-vector-width=" + Value));
301  }
302 }
303 
304 static void getWebAssemblyTargetFeatures(const ArgList &Args,
305  std::vector<StringRef> &Features) {
306  handleTargetFeaturesGroup(Args, Features, options::OPT_m_wasm_Features_Group);
307 }
308 
309 static void getTargetFeatures(const ToolChain &TC, const llvm::Triple &Triple,
310  const ArgList &Args, ArgStringList &CmdArgs,
311  bool ForAS) {
312  const Driver &D = TC.getDriver();
313  std::vector<StringRef> Features;
314  switch (Triple.getArch()) {
315  default:
316  break;
317  case llvm::Triple::mips:
318  case llvm::Triple::mipsel:
319  case llvm::Triple::mips64:
320  case llvm::Triple::mips64el:
321  mips::getMIPSTargetFeatures(D, Triple, Args, Features);
322  break;
323 
324  case llvm::Triple::arm:
325  case llvm::Triple::armeb:
326  case llvm::Triple::thumb:
327  case llvm::Triple::thumbeb:
328  arm::getARMTargetFeatures(TC, Triple, Args, CmdArgs, Features, ForAS);
329  break;
330 
331  case llvm::Triple::ppc:
332  case llvm::Triple::ppc64:
333  case llvm::Triple::ppc64le:
334  ppc::getPPCTargetFeatures(D, Triple, Args, Features);
335  break;
336  case llvm::Triple::riscv32:
337  case llvm::Triple::riscv64:
338  riscv::getRISCVTargetFeatures(D, Args, Features);
339  break;
340  case llvm::Triple::systemz:
341  systemz::getSystemZTargetFeatures(Args, Features);
342  break;
343  case llvm::Triple::aarch64:
344  case llvm::Triple::aarch64_be:
345  aarch64::getAArch64TargetFeatures(D, Triple, Args, Features);
346  break;
347  case llvm::Triple::x86:
348  case llvm::Triple::x86_64:
349  x86::getX86TargetFeatures(D, Triple, Args, Features);
350  break;
351  case llvm::Triple::hexagon:
352  hexagon::getHexagonTargetFeatures(D, Args, Features);
353  break;
354  case llvm::Triple::wasm32:
355  case llvm::Triple::wasm64:
356  getWebAssemblyTargetFeatures(Args, Features);
357  break;
358  case llvm::Triple::sparc:
359  case llvm::Triple::sparcel:
360  case llvm::Triple::sparcv9:
361  sparc::getSparcTargetFeatures(D, Args, Features);
362  break;
363  case llvm::Triple::r600:
364  case llvm::Triple::amdgcn:
365  amdgpu::getAMDGPUTargetFeatures(D, Args, Features);
366  break;
367  case llvm::Triple::msp430:
368  msp430::getMSP430TargetFeatures(D, Args, Features);
369  }
370 
371  // Find the last of each feature.
372  llvm::StringMap<unsigned> LastOpt;
373  for (unsigned I = 0, N = Features.size(); I < N; ++I) {
374  StringRef Name = Features[I];
375  assert(Name[0] == '-' || Name[0] == '+');
376  LastOpt[Name.drop_front(1)] = I;
377  }
378 
379  for (unsigned I = 0, N = Features.size(); I < N; ++I) {
380  // If this feature was overridden, ignore it.
381  StringRef Name = Features[I];
382  llvm::StringMap<unsigned>::iterator LastI = LastOpt.find(Name.drop_front(1));
383  assert(LastI != LastOpt.end());
384  unsigned Last = LastI->second;
385  if (Last != I)
386  continue;
387 
388  CmdArgs.push_back("-target-feature");
389  CmdArgs.push_back(Name.data());
390  }
391 }
392 
393 static bool
395  const llvm::Triple &Triple) {
396  // We use the zero-cost exception tables for Objective-C if the non-fragile
397  // ABI is enabled or when compiling for x86_64 and ARM on Snow Leopard and
398  // later.
399  if (runtime.isNonFragile())
400  return true;
401 
402  if (!Triple.isMacOSX())
403  return false;
404 
405  return (!Triple.isMacOSXVersionLT(10, 5) &&
406  (Triple.getArch() == llvm::Triple::x86_64 ||
407  Triple.getArch() == llvm::Triple::arm));
408 }
409 
410 /// Adds exception related arguments to the driver command arguments. There's a
411 /// master flag, -fexceptions and also language specific flags to enable/disable
412 /// C++ and Objective-C exceptions. This makes it possible to for example
413 /// disable C++ exceptions but enable Objective-C exceptions.
414 static void addExceptionArgs(const ArgList &Args, types::ID InputType,
415  const ToolChain &TC, bool KernelOrKext,
416  const ObjCRuntime &objcRuntime,
417  ArgStringList &CmdArgs) {
418  const llvm::Triple &Triple = TC.getTriple();
419 
420  if (KernelOrKext) {
421  // -mkernel and -fapple-kext imply no exceptions, so claim exception related
422  // arguments now to avoid warnings about unused arguments.
423  Args.ClaimAllArgs(options::OPT_fexceptions);
424  Args.ClaimAllArgs(options::OPT_fno_exceptions);
425  Args.ClaimAllArgs(options::OPT_fobjc_exceptions);
426  Args.ClaimAllArgs(options::OPT_fno_objc_exceptions);
427  Args.ClaimAllArgs(options::OPT_fcxx_exceptions);
428  Args.ClaimAllArgs(options::OPT_fno_cxx_exceptions);
429  return;
430  }
431 
432  // See if the user explicitly enabled exceptions.
433  bool EH = Args.hasFlag(options::OPT_fexceptions, options::OPT_fno_exceptions,
434  false);
435 
436  // Obj-C exceptions are enabled by default, regardless of -fexceptions. This
437  // is not necessarily sensible, but follows GCC.
438  if (types::isObjC(InputType) &&
439  Args.hasFlag(options::OPT_fobjc_exceptions,
440  options::OPT_fno_objc_exceptions, true)) {
441  CmdArgs.push_back("-fobjc-exceptions");
442 
443  EH |= shouldUseExceptionTablesForObjCExceptions(objcRuntime, Triple);
444  }
445 
446  if (types::isCXX(InputType)) {
447  // Disable C++ EH by default on XCore and PS4.
448  bool CXXExceptionsEnabled =
449  Triple.getArch() != llvm::Triple::xcore && !Triple.isPS4CPU();
450  Arg *ExceptionArg = Args.getLastArg(
451  options::OPT_fcxx_exceptions, options::OPT_fno_cxx_exceptions,
452  options::OPT_fexceptions, options::OPT_fno_exceptions);
453  if (ExceptionArg)
454  CXXExceptionsEnabled =
455  ExceptionArg->getOption().matches(options::OPT_fcxx_exceptions) ||
456  ExceptionArg->getOption().matches(options::OPT_fexceptions);
457 
458  if (CXXExceptionsEnabled) {
459  CmdArgs.push_back("-fcxx-exceptions");
460 
461  EH = true;
462  }
463  }
464 
465  if (EH)
466  CmdArgs.push_back("-fexceptions");
467 }
468 
469 static bool ShouldDisableAutolink(const ArgList &Args, const ToolChain &TC) {
470  bool Default = true;
471  if (TC.getTriple().isOSDarwin()) {
472  // The native darwin assembler doesn't support the linker_option directives,
473  // so we disable them if we think the .s file will be passed to it.
474  Default = TC.useIntegratedAs();
475  }
476  return !Args.hasFlag(options::OPT_fautolink, options::OPT_fno_autolink,
477  Default);
478 }
479 
480 static bool ShouldDisableDwarfDirectory(const ArgList &Args,
481  const ToolChain &TC) {
482  bool UseDwarfDirectory =
483  Args.hasFlag(options::OPT_fdwarf_directory_asm,
484  options::OPT_fno_dwarf_directory_asm, TC.useIntegratedAs());
485  return !UseDwarfDirectory;
486 }
487 
488 // Convert an arg of the form "-gN" or "-ggdbN" or one of their aliases
489 // to the corresponding DebugInfoKind.
491  assert(A.getOption().matches(options::OPT_gN_Group) &&
492  "Not a -g option that specifies a debug-info level");
493  if (A.getOption().matches(options::OPT_g0) ||
494  A.getOption().matches(options::OPT_ggdb0))
496  if (A.getOption().matches(options::OPT_gline_tables_only) ||
497  A.getOption().matches(options::OPT_ggdb1))
499  if (A.getOption().matches(options::OPT_gline_directives_only))
502 }
503 
504 static bool mustUseNonLeafFramePointerForTarget(const llvm::Triple &Triple) {
505  switch (Triple.getArch()){
506  default:
507  return false;
508  case llvm::Triple::arm:
509  case llvm::Triple::thumb:
510  // ARM Darwin targets require a frame pointer to be always present to aid
511  // offline debugging via backtraces.
512  return Triple.isOSDarwin();
513  }
514 }
515 
516 static bool useFramePointerForTargetByDefault(const ArgList &Args,
517  const llvm::Triple &Triple) {
518  switch (Triple.getArch()) {
519  case llvm::Triple::xcore:
520  case llvm::Triple::wasm32:
521  case llvm::Triple::wasm64:
522  case llvm::Triple::msp430:
523  // XCore never wants frame pointers, regardless of OS.
524  // WebAssembly never wants frame pointers.
525  return false;
526  case llvm::Triple::riscv32:
527  case llvm::Triple::riscv64:
528  return !areOptimizationsEnabled(Args);
529  default:
530  break;
531  }
532 
533  if (Triple.isOSNetBSD()) {
534  return !areOptimizationsEnabled(Args);
535  }
536 
537  if (Triple.isOSOpenBSD()) {
538  switch (Triple.getArch()) {
539  case llvm::Triple::mips64:
540  case llvm::Triple::mips64el:
541  case llvm::Triple::ppc:
542  case llvm::Triple::x86:
543  case llvm::Triple::x86_64:
544  return !areOptimizationsEnabled(Args);
545  default:
546  return true;
547  }
548  }
549 
550  if (Triple.isOSLinux() || Triple.getOS() == llvm::Triple::CloudABI ||
551  Triple.isOSHurd()) {
552  switch (Triple.getArch()) {
553  // Don't use a frame pointer on linux if optimizing for certain targets.
554  case llvm::Triple::mips64:
555  case llvm::Triple::mips64el:
556  case llvm::Triple::mips:
557  case llvm::Triple::mipsel:
558  case llvm::Triple::ppc:
559  case llvm::Triple::ppc64:
560  case llvm::Triple::ppc64le:
561  case llvm::Triple::systemz:
562  case llvm::Triple::x86:
563  case llvm::Triple::x86_64:
564  return !areOptimizationsEnabled(Args);
565  default:
566  return true;
567  }
568  }
569 
570  if (Triple.isOSWindows()) {
571  switch (Triple.getArch()) {
572  case llvm::Triple::x86:
573  return !areOptimizationsEnabled(Args);
574  case llvm::Triple::x86_64:
575  return Triple.isOSBinFormatMachO();
576  case llvm::Triple::arm:
577  case llvm::Triple::thumb:
578  // Windows on ARM builds with FPO disabled to aid fast stack walking
579  return true;
580  default:
581  // All other supported Windows ISAs use xdata unwind information, so frame
582  // pointers are not generally useful.
583  return false;
584  }
585  }
586 
587  return true;
588 }
589 
590 static bool shouldUseFramePointer(const ArgList &Args,
591  const llvm::Triple &Triple) {
592  if (Arg *A = Args.getLastArg(options::OPT_fno_omit_frame_pointer,
593  options::OPT_fomit_frame_pointer))
594  return A->getOption().matches(options::OPT_fno_omit_frame_pointer) ||
596 
597  if (Args.hasArg(options::OPT_pg))
598  return true;
599 
600  return useFramePointerForTargetByDefault(Args, Triple);
601 }
602 
603 static bool shouldUseLeafFramePointer(const ArgList &Args,
604  const llvm::Triple &Triple) {
605  if (Arg *A = Args.getLastArg(options::OPT_mno_omit_leaf_frame_pointer,
606  options::OPT_momit_leaf_frame_pointer))
607  return A->getOption().matches(options::OPT_mno_omit_leaf_frame_pointer);
608 
609  if (Args.hasArg(options::OPT_pg))
610  return true;
611 
612  if (Triple.isPS4CPU())
613  return false;
614 
615  return useFramePointerForTargetByDefault(Args, Triple);
616 }
617 
618 /// Add a CC1 option to specify the debug compilation directory.
619 static void addDebugCompDirArg(const ArgList &Args, ArgStringList &CmdArgs) {
620  SmallString<128> cwd;
621  if (!llvm::sys::fs::current_path(cwd)) {
622  CmdArgs.push_back("-fdebug-compilation-dir");
623  CmdArgs.push_back(Args.MakeArgString(cwd));
624  }
625 }
626 
627 /// Add a CC1 and CC1AS option to specify the debug file path prefix map.
628 static void addDebugPrefixMapArg(const Driver &D, const ArgList &Args, ArgStringList &CmdArgs) {
629  for (const Arg *A : Args.filtered(options::OPT_fdebug_prefix_map_EQ)) {
630  StringRef Map = A->getValue();
631  if (Map.find('=') == StringRef::npos)
632  D.Diag(diag::err_drv_invalid_argument_to_fdebug_prefix_map) << Map;
633  else
634  CmdArgs.push_back(Args.MakeArgString("-fdebug-prefix-map=" + Map));
635  A->claim();
636  }
637 }
638 
639 /// Vectorize at all optimization levels greater than 1 except for -Oz.
640 /// For -Oz the loop vectorizer is disable, while the slp vectorizer is enabled.
641 static bool shouldEnableVectorizerAtOLevel(const ArgList &Args, bool isSlpVec) {
642  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
643  if (A->getOption().matches(options::OPT_O4) ||
644  A->getOption().matches(options::OPT_Ofast))
645  return true;
646 
647  if (A->getOption().matches(options::OPT_O0))
648  return false;
649 
650  assert(A->getOption().matches(options::OPT_O) && "Must have a -O flag");
651 
652  // Vectorize -Os.
653  StringRef S(A->getValue());
654  if (S == "s")
655  return true;
656 
657  // Don't vectorize -Oz, unless it's the slp vectorizer.
658  if (S == "z")
659  return isSlpVec;
660 
661  unsigned OptLevel = 0;
662  if (S.getAsInteger(10, OptLevel))
663  return false;
664 
665  return OptLevel > 1;
666  }
667 
668  return false;
669 }
670 
671 /// Add -x lang to \p CmdArgs for \p Input.
672 static void addDashXForInput(const ArgList &Args, const InputInfo &Input,
673  ArgStringList &CmdArgs) {
674  // When using -verify-pch, we don't want to provide the type
675  // 'precompiled-header' if it was inferred from the file extension
676  if (Args.hasArg(options::OPT_verify_pch) && Input.getType() == types::TY_PCH)
677  return;
678 
679  CmdArgs.push_back("-x");
680  if (Args.hasArg(options::OPT_rewrite_objc))
681  CmdArgs.push_back(types::getTypeName(types::TY_PP_ObjCXX));
682  else {
683  // Map the driver type to the frontend type. This is mostly an identity
684  // mapping, except that the distinction between module interface units
685  // and other source files does not exist at the frontend layer.
686  const char *ClangType;
687  switch (Input.getType()) {
688  case types::TY_CXXModule:
689  ClangType = "c++";
690  break;
691  case types::TY_PP_CXXModule:
692  ClangType = "c++-cpp-output";
693  break;
694  default:
695  ClangType = types::getTypeName(Input.getType());
696  break;
697  }
698  CmdArgs.push_back(ClangType);
699  }
700 }
701 
703 #ifdef LLVM_ON_UNIX
704  const char *Username = getenv("LOGNAME");
705 #else
706  const char *Username = getenv("USERNAME");
707 #endif
708  if (Username) {
709  // Validate that LoginName can be used in a path, and get its length.
710  size_t Len = 0;
711  for (const char *P = Username; *P; ++P, ++Len) {
712  if (!clang::isAlphanumeric(*P) && *P != '_') {
713  Username = nullptr;
714  break;
715  }
716  }
717 
718  if (Username && Len > 0) {
719  Result.append(Username, Username + Len);
720  return;
721  }
722  }
723 
724 // Fallback to user id.
725 #ifdef LLVM_ON_UNIX
726  std::string UID = llvm::utostr(getuid());
727 #else
728  // FIXME: Windows seems to have an 'SID' that might work.
729  std::string UID = "9999";
730 #endif
731  Result.append(UID.begin(), UID.end());
732 }
733 
734 static void addPGOAndCoverageFlags(Compilation &C, const Driver &D,
735  const InputInfo &Output, const ArgList &Args,
736  ArgStringList &CmdArgs) {
737 
738  auto *PGOGenerateArg = Args.getLastArg(options::OPT_fprofile_generate,
739  options::OPT_fprofile_generate_EQ,
740  options::OPT_fno_profile_generate);
741  if (PGOGenerateArg &&
742  PGOGenerateArg->getOption().matches(options::OPT_fno_profile_generate))
743  PGOGenerateArg = nullptr;
744 
745  auto *CSPGOGenerateArg = Args.getLastArg(options::OPT_fcs_profile_generate,
746  options::OPT_fcs_profile_generate_EQ,
747  options::OPT_fno_profile_generate);
748  if (CSPGOGenerateArg &&
749  CSPGOGenerateArg->getOption().matches(options::OPT_fno_profile_generate))
750  CSPGOGenerateArg = nullptr;
751 
752  auto *ProfileGenerateArg = Args.getLastArg(
753  options::OPT_fprofile_instr_generate,
754  options::OPT_fprofile_instr_generate_EQ,
755  options::OPT_fno_profile_instr_generate);
756  if (ProfileGenerateArg &&
757  ProfileGenerateArg->getOption().matches(
758  options::OPT_fno_profile_instr_generate))
759  ProfileGenerateArg = nullptr;
760 
761  if (PGOGenerateArg && ProfileGenerateArg)
762  D.Diag(diag::err_drv_argument_not_allowed_with)
763  << PGOGenerateArg->getSpelling() << ProfileGenerateArg->getSpelling();
764 
765  auto *ProfileUseArg = getLastProfileUseArg(Args);
766 
767  if (PGOGenerateArg && ProfileUseArg)
768  D.Diag(diag::err_drv_argument_not_allowed_with)
769  << ProfileUseArg->getSpelling() << PGOGenerateArg->getSpelling();
770 
771  if (ProfileGenerateArg && ProfileUseArg)
772  D.Diag(diag::err_drv_argument_not_allowed_with)
773  << ProfileGenerateArg->getSpelling() << ProfileUseArg->getSpelling();
774 
775  if (CSPGOGenerateArg && PGOGenerateArg)
776  D.Diag(diag::err_drv_argument_not_allowed_with)
777  << CSPGOGenerateArg->getSpelling() << PGOGenerateArg->getSpelling();
778 
779  if (ProfileGenerateArg) {
780  if (ProfileGenerateArg->getOption().matches(
781  options::OPT_fprofile_instr_generate_EQ))
782  CmdArgs.push_back(Args.MakeArgString(Twine("-fprofile-instrument-path=") +
783  ProfileGenerateArg->getValue()));
784  // The default is to use Clang Instrumentation.
785  CmdArgs.push_back("-fprofile-instrument=clang");
786  }
787 
788  Arg *PGOGenArg = nullptr;
789  if (PGOGenerateArg) {
790  assert(!CSPGOGenerateArg);
791  PGOGenArg = PGOGenerateArg;
792  CmdArgs.push_back("-fprofile-instrument=llvm");
793  }
794  if (CSPGOGenerateArg) {
795  assert(!PGOGenerateArg);
796  PGOGenArg = CSPGOGenerateArg;
797  CmdArgs.push_back("-fprofile-instrument=csllvm");
798  }
799  if (PGOGenArg) {
800  if (PGOGenArg->getOption().matches(
801  PGOGenerateArg ? options::OPT_fprofile_generate_EQ
802  : options::OPT_fcs_profile_generate_EQ)) {
803  SmallString<128> Path(PGOGenArg->getValue());
804  llvm::sys::path::append(Path, "default_%m.profraw");
805  CmdArgs.push_back(
806  Args.MakeArgString(Twine("-fprofile-instrument-path=") + Path));
807  }
808  }
809 
810  if (ProfileUseArg) {
811  if (ProfileUseArg->getOption().matches(options::OPT_fprofile_instr_use_EQ))
812  CmdArgs.push_back(Args.MakeArgString(
813  Twine("-fprofile-instrument-use-path=") + ProfileUseArg->getValue()));
814  else if ((ProfileUseArg->getOption().matches(
815  options::OPT_fprofile_use_EQ) ||
816  ProfileUseArg->getOption().matches(
817  options::OPT_fprofile_instr_use))) {
818  SmallString<128> Path(
819  ProfileUseArg->getNumValues() == 0 ? "" : ProfileUseArg->getValue());
820  if (Path.empty() || llvm::sys::fs::is_directory(Path))
821  llvm::sys::path::append(Path, "default.profdata");
822  CmdArgs.push_back(
823  Args.MakeArgString(Twine("-fprofile-instrument-use-path=") + Path));
824  }
825  }
826 
827  if (Args.hasArg(options::OPT_ftest_coverage) ||
828  Args.hasArg(options::OPT_coverage))
829  CmdArgs.push_back("-femit-coverage-notes");
830  if (Args.hasFlag(options::OPT_fprofile_arcs, options::OPT_fno_profile_arcs,
831  false) ||
832  Args.hasArg(options::OPT_coverage))
833  CmdArgs.push_back("-femit-coverage-data");
834 
835  if (Args.hasFlag(options::OPT_fcoverage_mapping,
836  options::OPT_fno_coverage_mapping, false)) {
837  if (!ProfileGenerateArg)
838  D.Diag(clang::diag::err_drv_argument_only_allowed_with)
839  << "-fcoverage-mapping"
840  << "-fprofile-instr-generate";
841 
842  CmdArgs.push_back("-fcoverage-mapping");
843  }
844 
845  if (Args.hasArg(options::OPT_fprofile_exclude_files_EQ)) {
846  auto *Arg = Args.getLastArg(options::OPT_fprofile_exclude_files_EQ);
847  if (!Args.hasArg(options::OPT_coverage))
848  D.Diag(clang::diag::err_drv_argument_only_allowed_with)
849  << "-fprofile-exclude-files="
850  << "--coverage";
851 
852  StringRef v = Arg->getValue();
853  CmdArgs.push_back(
854  Args.MakeArgString(Twine("-fprofile-exclude-files=" + v)));
855  }
856 
857  if (Args.hasArg(options::OPT_fprofile_filter_files_EQ)) {
858  auto *Arg = Args.getLastArg(options::OPT_fprofile_filter_files_EQ);
859  if (!Args.hasArg(options::OPT_coverage))
860  D.Diag(clang::diag::err_drv_argument_only_allowed_with)
861  << "-fprofile-filter-files="
862  << "--coverage";
863 
864  StringRef v = Arg->getValue();
865  CmdArgs.push_back(Args.MakeArgString(Twine("-fprofile-filter-files=" + v)));
866  }
867 
868  if (C.getArgs().hasArg(options::OPT_c) ||
869  C.getArgs().hasArg(options::OPT_S)) {
870  if (Output.isFilename()) {
871  CmdArgs.push_back("-coverage-notes-file");
872  SmallString<128> OutputFilename;
873  if (Arg *FinalOutput = C.getArgs().getLastArg(options::OPT_o))
874  OutputFilename = FinalOutput->getValue();
875  else
876  OutputFilename = llvm::sys::path::filename(Output.getBaseInput());
877  SmallString<128> CoverageFilename = OutputFilename;
878  if (llvm::sys::path::is_relative(CoverageFilename)) {
879  SmallString<128> Pwd;
880  if (!llvm::sys::fs::current_path(Pwd)) {
881  llvm::sys::path::append(Pwd, CoverageFilename);
882  CoverageFilename.swap(Pwd);
883  }
884  }
885  llvm::sys::path::replace_extension(CoverageFilename, "gcno");
886  CmdArgs.push_back(Args.MakeArgString(CoverageFilename));
887 
888  // Leave -fprofile-dir= an unused argument unless .gcda emission is
889  // enabled. To be polite, with '-fprofile-arcs -fno-profile-arcs' consider
890  // the flag used. There is no -fno-profile-dir, so the user has no
891  // targeted way to suppress the warning.
892  if (Args.hasArg(options::OPT_fprofile_arcs) ||
893  Args.hasArg(options::OPT_coverage)) {
894  CmdArgs.push_back("-coverage-data-file");
895  if (Arg *FProfileDir = Args.getLastArg(options::OPT_fprofile_dir)) {
896  CoverageFilename = FProfileDir->getValue();
897  llvm::sys::path::append(CoverageFilename, OutputFilename);
898  }
899  llvm::sys::path::replace_extension(CoverageFilename, "gcda");
900  CmdArgs.push_back(Args.MakeArgString(CoverageFilename));
901  }
902  }
903  }
904 }
905 
906 /// Check whether the given input tree contains any compilation actions.
907 static bool ContainsCompileAction(const Action *A) {
908  if (isa<CompileJobAction>(A) || isa<BackendJobAction>(A))
909  return true;
910 
911  for (const auto &AI : A->inputs())
912  if (ContainsCompileAction(AI))
913  return true;
914 
915  return false;
916 }
917 
918 /// Check if -relax-all should be passed to the internal assembler.
919 /// This is done by default when compiling non-assembler source with -O0.
920 static bool UseRelaxAll(Compilation &C, const ArgList &Args) {
921  bool RelaxDefault = true;
922 
923  if (Arg *A = Args.getLastArg(options::OPT_O_Group))
924  RelaxDefault = A->getOption().matches(options::OPT_O0);
925 
926  if (RelaxDefault) {
927  RelaxDefault = false;
928  for (const auto &Act : C.getActions()) {
929  if (ContainsCompileAction(Act)) {
930  RelaxDefault = true;
931  break;
932  }
933  }
934  }
935 
936  return Args.hasFlag(options::OPT_mrelax_all, options::OPT_mno_relax_all,
937  RelaxDefault);
938 }
939 
940 // Extract the integer N from a string spelled "-dwarf-N", returning 0
941 // on mismatch. The StringRef input (rather than an Arg) allows
942 // for use by the "-Xassembler" option parser.
943 static unsigned DwarfVersionNum(StringRef ArgValue) {
944  return llvm::StringSwitch<unsigned>(ArgValue)
945  .Case("-gdwarf-2", 2)
946  .Case("-gdwarf-3", 3)
947  .Case("-gdwarf-4", 4)
948  .Case("-gdwarf-5", 5)
949  .Default(0);
950 }
951 
952 static void RenderDebugEnablingArgs(const ArgList &Args, ArgStringList &CmdArgs,
954  unsigned DwarfVersion,
955  llvm::DebuggerKind DebuggerTuning) {
956  switch (DebugInfoKind) {
958  CmdArgs.push_back("-debug-info-kind=line-directives-only");
959  break;
961  CmdArgs.push_back("-debug-info-kind=line-tables-only");
962  break;
964  CmdArgs.push_back("-debug-info-kind=limited");
965  break;
967  CmdArgs.push_back("-debug-info-kind=standalone");
968  break;
969  default:
970  break;
971  }
972  if (DwarfVersion > 0)
973  CmdArgs.push_back(
974  Args.MakeArgString("-dwarf-version=" + Twine(DwarfVersion)));
975  switch (DebuggerTuning) {
976  case llvm::DebuggerKind::GDB:
977  CmdArgs.push_back("-debugger-tuning=gdb");
978  break;
979  case llvm::DebuggerKind::LLDB:
980  CmdArgs.push_back("-debugger-tuning=lldb");
981  break;
982  case llvm::DebuggerKind::SCE:
983  CmdArgs.push_back("-debugger-tuning=sce");
984  break;
985  default:
986  break;
987  }
988 }
989 
990 static bool checkDebugInfoOption(const Arg *A, const ArgList &Args,
991  const Driver &D, const ToolChain &TC) {
992  assert(A && "Expected non-nullptr argument.");
993  if (TC.supportsDebugInfoOption(A))
994  return true;
995  D.Diag(diag::warn_drv_unsupported_debug_info_opt_for_target)
996  << A->getAsString(Args) << TC.getTripleString();
997  return false;
998 }
999 
1000 static void RenderDebugInfoCompressionArgs(const ArgList &Args,
1001  ArgStringList &CmdArgs,
1002  const Driver &D,
1003  const ToolChain &TC) {
1004  const Arg *A = Args.getLastArg(options::OPT_gz, options::OPT_gz_EQ);
1005  if (!A)
1006  return;
1007  if (checkDebugInfoOption(A, Args, D, TC)) {
1008  if (A->getOption().getID() == options::OPT_gz) {
1009  if (llvm::zlib::isAvailable())
1010  CmdArgs.push_back("-compress-debug-sections");
1011  else
1012  D.Diag(diag::warn_debug_compression_unavailable);
1013  return;
1014  }
1015 
1016  StringRef Value = A->getValue();
1017  if (Value == "none") {
1018  CmdArgs.push_back("-compress-debug-sections=none");
1019  } else if (Value == "zlib" || Value == "zlib-gnu") {
1020  if (llvm::zlib::isAvailable()) {
1021  CmdArgs.push_back(
1022  Args.MakeArgString("-compress-debug-sections=" + Twine(Value)));
1023  } else {
1024  D.Diag(diag::warn_debug_compression_unavailable);
1025  }
1026  } else {
1027  D.Diag(diag::err_drv_unsupported_option_argument)
1028  << A->getOption().getName() << Value;
1029  }
1030  }
1031 }
1032 
1033 static const char *RelocationModelName(llvm::Reloc::Model Model) {
1034  switch (Model) {
1035  case llvm::Reloc::Static:
1036  return "static";
1037  case llvm::Reloc::PIC_:
1038  return "pic";
1039  case llvm::Reloc::DynamicNoPIC:
1040  return "dynamic-no-pic";
1041  case llvm::Reloc::ROPI:
1042  return "ropi";
1043  case llvm::Reloc::RWPI:
1044  return "rwpi";
1045  case llvm::Reloc::ROPI_RWPI:
1046  return "ropi-rwpi";
1047  }
1048  llvm_unreachable("Unknown Reloc::Model kind");
1049 }
1050 
1051 void Clang::AddPreprocessingOptions(Compilation &C, const JobAction &JA,
1052  const Driver &D, const ArgList &Args,
1053  ArgStringList &CmdArgs,
1054  const InputInfo &Output,
1055  const InputInfoList &Inputs) const {
1056  Arg *A;
1057  const bool IsIAMCU = getToolChain().getTriple().isOSIAMCU();
1058 
1059  CheckPreprocessingOptions(D, Args);
1060 
1061  Args.AddLastArg(CmdArgs, options::OPT_C);
1062  Args.AddLastArg(CmdArgs, options::OPT_CC);
1063 
1064  // Handle dependency file generation.
1065  if ((A = Args.getLastArg(options::OPT_M, options::OPT_MM)) ||
1066  (A = Args.getLastArg(options::OPT_MD)) ||
1067  (A = Args.getLastArg(options::OPT_MMD))) {
1068  // Determine the output location.
1069  const char *DepFile;
1070  if (Arg *MF = Args.getLastArg(options::OPT_MF)) {
1071  DepFile = MF->getValue();
1072  C.addFailureResultFile(DepFile, &JA);
1073  } else if (Output.getType() == types::TY_Dependencies) {
1074  DepFile = Output.getFilename();
1075  } else if (A->getOption().matches(options::OPT_M) ||
1076  A->getOption().matches(options::OPT_MM)) {
1077  DepFile = "-";
1078  } else {
1079  DepFile = getDependencyFileName(Args, Inputs);
1080  C.addFailureResultFile(DepFile, &JA);
1081  }
1082  CmdArgs.push_back("-dependency-file");
1083  CmdArgs.push_back(DepFile);
1084 
1085  // Add a default target if one wasn't specified.
1086  if (!Args.hasArg(options::OPT_MT) && !Args.hasArg(options::OPT_MQ)) {
1087  const char *DepTarget;
1088 
1089  // If user provided -o, that is the dependency target, except
1090  // when we are only generating a dependency file.
1091  Arg *OutputOpt = Args.getLastArg(options::OPT_o);
1092  if (OutputOpt && Output.getType() != types::TY_Dependencies) {
1093  DepTarget = OutputOpt->getValue();
1094  } else {
1095  // Otherwise derive from the base input.
1096  //
1097  // FIXME: This should use the computed output file location.
1098  SmallString<128> P(Inputs[0].getBaseInput());
1099  llvm::sys::path::replace_extension(P, "o");
1100  DepTarget = Args.MakeArgString(llvm::sys::path::filename(P));
1101  }
1102 
1103  if (!A->getOption().matches(options::OPT_MD) && !A->getOption().matches(options::OPT_MMD)) {
1104  CmdArgs.push_back("-w");
1105  }
1106  CmdArgs.push_back("-MT");
1108  QuoteTarget(DepTarget, Quoted);
1109  CmdArgs.push_back(Args.MakeArgString(Quoted));
1110  }
1111 
1112  if (A->getOption().matches(options::OPT_M) ||
1113  A->getOption().matches(options::OPT_MD))
1114  CmdArgs.push_back("-sys-header-deps");
1115  if ((isa<PrecompileJobAction>(JA) &&
1116  !Args.hasArg(options::OPT_fno_module_file_deps)) ||
1117  Args.hasArg(options::OPT_fmodule_file_deps))
1118  CmdArgs.push_back("-module-file-deps");
1119  }
1120 
1121  if (Args.hasArg(options::OPT_MG)) {
1122  if (!A || A->getOption().matches(options::OPT_MD) ||
1123  A->getOption().matches(options::OPT_MMD))
1124  D.Diag(diag::err_drv_mg_requires_m_or_mm);
1125  CmdArgs.push_back("-MG");
1126  }
1127 
1128  Args.AddLastArg(CmdArgs, options::OPT_MP);
1129  Args.AddLastArg(CmdArgs, options::OPT_MV);
1130 
1131  // Convert all -MQ <target> args to -MT <quoted target>
1132  for (const Arg *A : Args.filtered(options::OPT_MT, options::OPT_MQ)) {
1133  A->claim();
1134 
1135  if (A->getOption().matches(options::OPT_MQ)) {
1136  CmdArgs.push_back("-MT");
1138  QuoteTarget(A->getValue(), Quoted);
1139  CmdArgs.push_back(Args.MakeArgString(Quoted));
1140 
1141  // -MT flag - no change
1142  } else {
1143  A->render(Args, CmdArgs);
1144  }
1145  }
1146 
1147  // Add offload include arguments specific for CUDA. This must happen before
1148  // we -I or -include anything else, because we must pick up the CUDA headers
1149  // from the particular CUDA installation, rather than from e.g.
1150  // /usr/local/include.
1152  getToolChain().AddCudaIncludeArgs(Args, CmdArgs);
1153 
1154  // Add -i* options, and automatically translate to
1155  // -include-pch/-include-pth for transparent PCH support. It's
1156  // wonky, but we include looking for .gch so we can support seamless
1157  // replacement into a build system already set up to be generating
1158  // .gch files.
1159 
1160  if (getToolChain().getDriver().IsCLMode()) {
1161  const Arg *YcArg = Args.getLastArg(options::OPT__SLASH_Yc);
1162  const Arg *YuArg = Args.getLastArg(options::OPT__SLASH_Yu);
1163  if (YcArg && JA.getKind() >= Action::PrecompileJobClass &&
1165  CmdArgs.push_back(Args.MakeArgString("-building-pch-with-obj"));
1166  }
1167  if (YcArg || YuArg) {
1168  StringRef ThroughHeader = YcArg ? YcArg->getValue() : YuArg->getValue();
1169  if (!isa<PrecompileJobAction>(JA)) {
1170  CmdArgs.push_back("-include-pch");
1171  CmdArgs.push_back(Args.MakeArgString(D.GetClPchPath(
1172  C, !ThroughHeader.empty()
1173  ? ThroughHeader
1174  : llvm::sys::path::filename(Inputs[0].getBaseInput()))));
1175  }
1176 
1177  if (ThroughHeader.empty()) {
1178  CmdArgs.push_back(Args.MakeArgString(
1179  Twine("-pch-through-hdrstop-") + (YcArg ? "create" : "use")));
1180  } else {
1181  CmdArgs.push_back(
1182  Args.MakeArgString(Twine("-pch-through-header=") + ThroughHeader));
1183  }
1184  }
1185  }
1186 
1187  bool RenderedImplicitInclude = false;
1188  for (const Arg *A : Args.filtered(options::OPT_clang_i_Group)) {
1189  if (A->getOption().matches(options::OPT_include)) {
1190  // Handling of gcc-style gch precompiled headers.
1191  bool IsFirstImplicitInclude = !RenderedImplicitInclude;
1192  RenderedImplicitInclude = true;
1193 
1194  bool FoundPCH = false;
1195  SmallString<128> P(A->getValue());
1196  // We want the files to have a name like foo.h.pch. Add a dummy extension
1197  // so that replace_extension does the right thing.
1198  P += ".dummy";
1199  llvm::sys::path::replace_extension(P, "pch");
1200  if (llvm::sys::fs::exists(P))
1201  FoundPCH = true;
1202 
1203  if (!FoundPCH) {
1204  llvm::sys::path::replace_extension(P, "gch");
1205  if (llvm::sys::fs::exists(P)) {
1206  FoundPCH = true;
1207  }
1208  }
1209 
1210  if (FoundPCH) {
1211  if (IsFirstImplicitInclude) {
1212  A->claim();
1213  CmdArgs.push_back("-include-pch");
1214  CmdArgs.push_back(Args.MakeArgString(P));
1215  continue;
1216  } else {
1217  // Ignore the PCH if not first on command line and emit warning.
1218  D.Diag(diag::warn_drv_pch_not_first_include) << P
1219  << A->getAsString(Args);
1220  }
1221  }
1222  } else if (A->getOption().matches(options::OPT_isystem_after)) {
1223  // Handling of paths which must come late. These entries are handled by
1224  // the toolchain itself after the resource dir is inserted in the right
1225  // search order.
1226  // Do not claim the argument so that the use of the argument does not
1227  // silently go unnoticed on toolchains which do not honour the option.
1228  continue;
1229  }
1230 
1231  // Not translated, render as usual.
1232  A->claim();
1233  A->render(Args, CmdArgs);
1234  }
1235 
1236  Args.AddAllArgs(CmdArgs,
1237  {options::OPT_D, options::OPT_U, options::OPT_I_Group,
1238  options::OPT_F, options::OPT_index_header_map});
1239 
1240  // Add -Wp, and -Xpreprocessor if using the preprocessor.
1241 
1242  // FIXME: There is a very unfortunate problem here, some troubled
1243  // souls abuse -Wp, to pass preprocessor options in gcc syntax. To
1244  // really support that we would have to parse and then translate
1245  // those options. :(
1246  Args.AddAllArgValues(CmdArgs, options::OPT_Wp_COMMA,
1247  options::OPT_Xpreprocessor);
1248 
1249  // -I- is a deprecated GCC feature, reject it.
1250  if (Arg *A = Args.getLastArg(options::OPT_I_))
1251  D.Diag(diag::err_drv_I_dash_not_supported) << A->getAsString(Args);
1252 
1253  // If we have a --sysroot, and don't have an explicit -isysroot flag, add an
1254  // -isysroot to the CC1 invocation.
1255  StringRef sysroot = C.getSysRoot();
1256  if (sysroot != "") {
1257  if (!Args.hasArg(options::OPT_isysroot)) {
1258  CmdArgs.push_back("-isysroot");
1259  CmdArgs.push_back(C.getArgs().MakeArgString(sysroot));
1260  }
1261  }
1262 
1263  // Parse additional include paths from environment variables.
1264  // FIXME: We should probably sink the logic for handling these from the
1265  // frontend into the driver. It will allow deleting 4 otherwise unused flags.
1266  // CPATH - included following the user specified includes (but prior to
1267  // builtin and standard includes).
1268  addDirectoryList(Args, CmdArgs, "-I", "CPATH");
1269  // C_INCLUDE_PATH - system includes enabled when compiling C.
1270  addDirectoryList(Args, CmdArgs, "-c-isystem", "C_INCLUDE_PATH");
1271  // CPLUS_INCLUDE_PATH - system includes enabled when compiling C++.
1272  addDirectoryList(Args, CmdArgs, "-cxx-isystem", "CPLUS_INCLUDE_PATH");
1273  // OBJC_INCLUDE_PATH - system includes enabled when compiling ObjC.
1274  addDirectoryList(Args, CmdArgs, "-objc-isystem", "OBJC_INCLUDE_PATH");
1275  // OBJCPLUS_INCLUDE_PATH - system includes enabled when compiling ObjC++.
1276  addDirectoryList(Args, CmdArgs, "-objcxx-isystem", "OBJCPLUS_INCLUDE_PATH");
1277 
1278  // While adding the include arguments, we also attempt to retrieve the
1279  // arguments of related offloading toolchains or arguments that are specific
1280  // of an offloading programming model.
1281 
1282  // Add C++ include arguments, if needed.
1283  if (types::isCXX(Inputs[0].getType()))
1284  forAllAssociatedToolChains(C, JA, getToolChain(),
1285  [&Args, &CmdArgs](const ToolChain &TC) {
1286  TC.AddClangCXXStdlibIncludeArgs(Args, CmdArgs);
1287  });
1288 
1289  // Add system include arguments for all targets but IAMCU.
1290  if (!IsIAMCU)
1291  forAllAssociatedToolChains(C, JA, getToolChain(),
1292  [&Args, &CmdArgs](const ToolChain &TC) {
1293  TC.AddClangSystemIncludeArgs(Args, CmdArgs);
1294  });
1295  else {
1296  // For IAMCU add special include arguments.
1297  getToolChain().AddIAMCUIncludeArgs(Args, CmdArgs);
1298  }
1299 }
1300 
1301 // FIXME: Move to target hook.
1302 static bool isSignedCharDefault(const llvm::Triple &Triple) {
1303  switch (Triple.getArch()) {
1304  default:
1305  return true;
1306 
1307  case llvm::Triple::aarch64:
1308  case llvm::Triple::aarch64_be:
1309  case llvm::Triple::arm:
1310  case llvm::Triple::armeb:
1311  case llvm::Triple::thumb:
1312  case llvm::Triple::thumbeb:
1313  if (Triple.isOSDarwin() || Triple.isOSWindows())
1314  return true;
1315  return false;
1316 
1317  case llvm::Triple::ppc:
1318  case llvm::Triple::ppc64:
1319  if (Triple.isOSDarwin())
1320  return true;
1321  return false;
1322 
1323  case llvm::Triple::hexagon:
1324  case llvm::Triple::ppc64le:
1325  case llvm::Triple::riscv32:
1326  case llvm::Triple::riscv64:
1327  case llvm::Triple::systemz:
1328  case llvm::Triple::xcore:
1329  return false;
1330  }
1331 }
1332 
1333 static bool isNoCommonDefault(const llvm::Triple &Triple) {
1334  switch (Triple.getArch()) {
1335  default:
1336  if (Triple.isOSFuchsia())
1337  return true;
1338  return false;
1339 
1340  case llvm::Triple::xcore:
1341  case llvm::Triple::wasm32:
1342  case llvm::Triple::wasm64:
1343  return true;
1344  }
1345 }
1346 
1347 namespace {
1348 void RenderARMABI(const llvm::Triple &Triple, const ArgList &Args,
1349  ArgStringList &CmdArgs) {
1350  // Select the ABI to use.
1351  // FIXME: Support -meabi.
1352  // FIXME: Parts of this are duplicated in the backend, unify this somehow.
1353  const char *ABIName = nullptr;
1354  if (Arg *A = Args.getLastArg(options::OPT_mabi_EQ)) {
1355  ABIName = A->getValue();
1356  } else {
1357  std::string CPU = getCPUName(Args, Triple, /*FromAs*/ false);
1358  ABIName = llvm::ARM::computeDefaultTargetABI(Triple, CPU).data();
1359  }
1360 
1361  CmdArgs.push_back("-target-abi");
1362  CmdArgs.push_back(ABIName);
1363 }
1364 }
1365 
1366 void Clang::AddARMTargetArgs(const llvm::Triple &Triple, const ArgList &Args,
1367  ArgStringList &CmdArgs, bool KernelOrKext) const {
1368  RenderARMABI(Triple, Args, CmdArgs);
1369 
1370  // Determine floating point ABI from the options & target defaults.
1371  arm::FloatABI ABI = arm::getARMFloatABI(getToolChain(), Args);
1372  if (ABI == arm::FloatABI::Soft) {
1373  // Floating point operations and argument passing are soft.
1374  // FIXME: This changes CPP defines, we need -target-soft-float.
1375  CmdArgs.push_back("-msoft-float");
1376  CmdArgs.push_back("-mfloat-abi");
1377  CmdArgs.push_back("soft");
1378  } else if (ABI == arm::FloatABI::SoftFP) {
1379  // Floating point operations are hard, but argument passing is soft.
1380  CmdArgs.push_back("-mfloat-abi");
1381  CmdArgs.push_back("soft");
1382  } else {
1383  // Floating point operations and argument passing are hard.
1384  assert(ABI == arm::FloatABI::Hard && "Invalid float abi!");
1385  CmdArgs.push_back("-mfloat-abi");
1386  CmdArgs.push_back("hard");
1387  }
1388 
1389  // Forward the -mglobal-merge option for explicit control over the pass.
1390  if (Arg *A = Args.getLastArg(options::OPT_mglobal_merge,
1391  options::OPT_mno_global_merge)) {
1392  CmdArgs.push_back("-mllvm");
1393  if (A->getOption().matches(options::OPT_mno_global_merge))
1394  CmdArgs.push_back("-arm-global-merge=false");
1395  else
1396  CmdArgs.push_back("-arm-global-merge=true");
1397  }
1398 
1399  if (!Args.hasFlag(options::OPT_mimplicit_float,
1400  options::OPT_mno_implicit_float, true))
1401  CmdArgs.push_back("-no-implicit-float");
1402 }
1403 
1404 void Clang::RenderTargetOptions(const llvm::Triple &EffectiveTriple,
1405  const ArgList &Args, bool KernelOrKext,
1406  ArgStringList &CmdArgs) const {
1407  const ToolChain &TC = getToolChain();
1408 
1409  // Add the target features
1410  getTargetFeatures(TC, EffectiveTriple, Args, CmdArgs, false);
1411 
1412  // Add target specific flags.
1413  switch (TC.getArch()) {
1414  default:
1415  break;
1416 
1417  case llvm::Triple::arm:
1418  case llvm::Triple::armeb:
1419  case llvm::Triple::thumb:
1420  case llvm::Triple::thumbeb:
1421  // Use the effective triple, which takes into account the deployment target.
1422  AddARMTargetArgs(EffectiveTriple, Args, CmdArgs, KernelOrKext);
1423  CmdArgs.push_back("-fallow-half-arguments-and-returns");
1424  break;
1425 
1426  case llvm::Triple::aarch64:
1427  case llvm::Triple::aarch64_be:
1428  AddAArch64TargetArgs(Args, CmdArgs);
1429  CmdArgs.push_back("-fallow-half-arguments-and-returns");
1430  break;
1431 
1432  case llvm::Triple::mips:
1433  case llvm::Triple::mipsel:
1434  case llvm::Triple::mips64:
1435  case llvm::Triple::mips64el:
1436  AddMIPSTargetArgs(Args, CmdArgs);
1437  break;
1438 
1439  case llvm::Triple::ppc:
1440  case llvm::Triple::ppc64:
1441  case llvm::Triple::ppc64le:
1442  AddPPCTargetArgs(Args, CmdArgs);
1443  break;
1444 
1445  case llvm::Triple::riscv32:
1446  case llvm::Triple::riscv64:
1447  AddRISCVTargetArgs(Args, CmdArgs);
1448  break;
1449 
1450  case llvm::Triple::sparc:
1451  case llvm::Triple::sparcel:
1452  case llvm::Triple::sparcv9:
1453  AddSparcTargetArgs(Args, CmdArgs);
1454  break;
1455 
1456  case llvm::Triple::systemz:
1457  AddSystemZTargetArgs(Args, CmdArgs);
1458  break;
1459 
1460  case llvm::Triple::x86:
1461  case llvm::Triple::x86_64:
1462  AddX86TargetArgs(Args, CmdArgs);
1463  break;
1464 
1465  case llvm::Triple::lanai:
1466  AddLanaiTargetArgs(Args, CmdArgs);
1467  break;
1468 
1469  case llvm::Triple::hexagon:
1470  AddHexagonTargetArgs(Args, CmdArgs);
1471  break;
1472 
1473  case llvm::Triple::wasm32:
1474  case llvm::Triple::wasm64:
1475  AddWebAssemblyTargetArgs(Args, CmdArgs);
1476  break;
1477  }
1478 }
1479 
1480 // Parse -mbranch-protection=<protection>[+<protection>]* where
1481 // <protection> ::= standard | none | [bti,pac-ret[+b-key,+leaf]*]
1482 // Returns a triple of (return address signing Scope, signing key, require
1483 // landing pads)
1484 static std::tuple<StringRef, StringRef, bool>
1485 ParseAArch64BranchProtection(const Driver &D, const ArgList &Args,
1486  const Arg *A) {
1487  StringRef Scope = "none";
1488  StringRef Key = "a_key";
1489  bool IndirectBranches = false;
1490 
1491  StringRef Value = A->getValue();
1492  // This maps onto -mbranch-protection=<scope>+<key>
1493 
1494  if (Value.equals("standard")) {
1495  Scope = "non-leaf";
1496  Key = "a_key";
1497  IndirectBranches = true;
1498 
1499  } else if (!Value.equals("none")) {
1500  SmallVector<StringRef, 4> BranchProtection;
1501  StringRef(A->getValue()).split(BranchProtection, '+');
1502 
1503  auto Protection = BranchProtection.begin();
1504  while (Protection != BranchProtection.end()) {
1505  if (Protection->equals("bti"))
1506  IndirectBranches = true;
1507  else if (Protection->equals("pac-ret")) {
1508  Scope = "non-leaf";
1509  while (++Protection != BranchProtection.end()) {
1510  // Inner loop as "leaf" and "b-key" options must only appear attached
1511  // to pac-ret.
1512  if (Protection->equals("leaf"))
1513  Scope = "all";
1514  else if (Protection->equals("b-key"))
1515  Key = "b_key";
1516  else
1517  break;
1518  }
1519  Protection--;
1520  } else
1521  D.Diag(diag::err_invalid_branch_protection)
1522  << *Protection << A->getAsString(Args);
1523  Protection++;
1524  }
1525  }
1526 
1527  return std::make_tuple(Scope, Key, IndirectBranches);
1528 }
1529 
1530 namespace {
1531 void RenderAArch64ABI(const llvm::Triple &Triple, const ArgList &Args,
1532  ArgStringList &CmdArgs) {
1533  const char *ABIName = nullptr;
1534  if (Arg *A = Args.getLastArg(options::OPT_mabi_EQ))
1535  ABIName = A->getValue();
1536  else if (Triple.isOSDarwin())
1537  ABIName = "darwinpcs";
1538  else
1539  ABIName = "aapcs";
1540 
1541  CmdArgs.push_back("-target-abi");
1542  CmdArgs.push_back(ABIName);
1543 }
1544 }
1545 
1546 void Clang::AddAArch64TargetArgs(const ArgList &Args,
1547  ArgStringList &CmdArgs) const {
1548  const llvm::Triple &Triple = getToolChain().getEffectiveTriple();
1549 
1550  if (!Args.hasFlag(options::OPT_mred_zone, options::OPT_mno_red_zone, true) ||
1551  Args.hasArg(options::OPT_mkernel) ||
1552  Args.hasArg(options::OPT_fapple_kext))
1553  CmdArgs.push_back("-disable-red-zone");
1554 
1555  if (!Args.hasFlag(options::OPT_mimplicit_float,
1556  options::OPT_mno_implicit_float, true))
1557  CmdArgs.push_back("-no-implicit-float");
1558 
1559  RenderAArch64ABI(Triple, Args, CmdArgs);
1560 
1561  if (Arg *A = Args.getLastArg(options::OPT_mfix_cortex_a53_835769,
1562  options::OPT_mno_fix_cortex_a53_835769)) {
1563  CmdArgs.push_back("-mllvm");
1564  if (A->getOption().matches(options::OPT_mfix_cortex_a53_835769))
1565  CmdArgs.push_back("-aarch64-fix-cortex-a53-835769=1");
1566  else
1567  CmdArgs.push_back("-aarch64-fix-cortex-a53-835769=0");
1568  } else if (Triple.isAndroid()) {
1569  // Enabled A53 errata (835769) workaround by default on android
1570  CmdArgs.push_back("-mllvm");
1571  CmdArgs.push_back("-aarch64-fix-cortex-a53-835769=1");
1572  }
1573 
1574  // Forward the -mglobal-merge option for explicit control over the pass.
1575  if (Arg *A = Args.getLastArg(options::OPT_mglobal_merge,
1576  options::OPT_mno_global_merge)) {
1577  CmdArgs.push_back("-mllvm");
1578  if (A->getOption().matches(options::OPT_mno_global_merge))
1579  CmdArgs.push_back("-aarch64-enable-global-merge=false");
1580  else
1581  CmdArgs.push_back("-aarch64-enable-global-merge=true");
1582  }
1583 
1584  // Enable/disable return address signing and indirect branch targets.
1585  if (Arg *A = Args.getLastArg(options::OPT_msign_return_address_EQ,
1586  options::OPT_mbranch_protection_EQ)) {
1587 
1588  const Driver &D = getToolChain().getDriver();
1589 
1590  StringRef Scope, Key;
1591  bool IndirectBranches;
1592 
1593  if (A->getOption().matches(options::OPT_msign_return_address_EQ)) {
1594  Scope = A->getValue();
1595  if (!Scope.equals("none") && !Scope.equals("non-leaf") &&
1596  !Scope.equals("all"))
1597  D.Diag(diag::err_invalid_branch_protection)
1598  << Scope << A->getAsString(Args);
1599  Key = "a_key";
1600  IndirectBranches = false;
1601  } else
1602  std::tie(Scope, Key, IndirectBranches) =
1603  ParseAArch64BranchProtection(D, Args, A);
1604 
1605  CmdArgs.push_back(
1606  Args.MakeArgString(Twine("-msign-return-address=") + Scope));
1607  CmdArgs.push_back(
1608  Args.MakeArgString(Twine("-msign-return-address-key=") + Key));
1609  if (IndirectBranches)
1610  CmdArgs.push_back("-mbranch-target-enforce");
1611  }
1612 }
1613 
1614 void Clang::AddMIPSTargetArgs(const ArgList &Args,
1615  ArgStringList &CmdArgs) const {
1616  const Driver &D = getToolChain().getDriver();
1617  StringRef CPUName;
1618  StringRef ABIName;
1619  const llvm::Triple &Triple = getToolChain().getTriple();
1620  mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName);
1621 
1622  CmdArgs.push_back("-target-abi");
1623  CmdArgs.push_back(ABIName.data());
1624 
1625  mips::FloatABI ABI = mips::getMipsFloatABI(D, Args);
1626  if (ABI == mips::FloatABI::Soft) {
1627  // Floating point operations and argument passing are soft.
1628  CmdArgs.push_back("-msoft-float");
1629  CmdArgs.push_back("-mfloat-abi");
1630  CmdArgs.push_back("soft");
1631  } else {
1632  // Floating point operations and argument passing are hard.
1633  assert(ABI == mips::FloatABI::Hard && "Invalid float abi!");
1634  CmdArgs.push_back("-mfloat-abi");
1635  CmdArgs.push_back("hard");
1636  }
1637 
1638  if (Arg *A = Args.getLastArg(options::OPT_mxgot, options::OPT_mno_xgot)) {
1639  if (A->getOption().matches(options::OPT_mxgot)) {
1640  CmdArgs.push_back("-mllvm");
1641  CmdArgs.push_back("-mxgot");
1642  }
1643  }
1644 
1645  if (Arg *A = Args.getLastArg(options::OPT_mldc1_sdc1,
1646  options::OPT_mno_ldc1_sdc1)) {
1647  if (A->getOption().matches(options::OPT_mno_ldc1_sdc1)) {
1648  CmdArgs.push_back("-mllvm");
1649  CmdArgs.push_back("-mno-ldc1-sdc1");
1650  }
1651  }
1652 
1653  if (Arg *A = Args.getLastArg(options::OPT_mcheck_zero_division,
1654  options::OPT_mno_check_zero_division)) {
1655  if (A->getOption().matches(options::OPT_mno_check_zero_division)) {
1656  CmdArgs.push_back("-mllvm");
1657  CmdArgs.push_back("-mno-check-zero-division");
1658  }
1659  }
1660 
1661  if (Arg *A = Args.getLastArg(options::OPT_G)) {
1662  StringRef v = A->getValue();
1663  CmdArgs.push_back("-mllvm");
1664  CmdArgs.push_back(Args.MakeArgString("-mips-ssection-threshold=" + v));
1665  A->claim();
1666  }
1667 
1668  Arg *GPOpt = Args.getLastArg(options::OPT_mgpopt, options::OPT_mno_gpopt);
1669  Arg *ABICalls =
1670  Args.getLastArg(options::OPT_mabicalls, options::OPT_mno_abicalls);
1671 
1672  // -mabicalls is the default for many MIPS environments, even with -fno-pic.
1673  // -mgpopt is the default for static, -fno-pic environments but these two
1674  // options conflict. We want to be certain that -mno-abicalls -mgpopt is
1675  // the only case where -mllvm -mgpopt is passed.
1676  // NOTE: We need a warning here or in the backend to warn when -mgpopt is
1677  // passed explicitly when compiling something with -mabicalls
1678  // (implictly) in affect. Currently the warning is in the backend.
1679  //
1680  // When the ABI in use is N64, we also need to determine the PIC mode that
1681  // is in use, as -fno-pic for N64 implies -mno-abicalls.
1682  bool NoABICalls =
1683  ABICalls && ABICalls->getOption().matches(options::OPT_mno_abicalls);
1684 
1685  llvm::Reloc::Model RelocationModel;
1686  unsigned PICLevel;
1687  bool IsPIE;
1688  std::tie(RelocationModel, PICLevel, IsPIE) =
1689  ParsePICArgs(getToolChain(), Args);
1690 
1691  NoABICalls = NoABICalls ||
1692  (RelocationModel == llvm::Reloc::Static && ABIName == "n64");
1693 
1694  bool WantGPOpt = GPOpt && GPOpt->getOption().matches(options::OPT_mgpopt);
1695  // We quietly ignore -mno-gpopt as the backend defaults to -mno-gpopt.
1696  if (NoABICalls && (!GPOpt || WantGPOpt)) {
1697  CmdArgs.push_back("-mllvm");
1698  CmdArgs.push_back("-mgpopt");
1699 
1700  Arg *LocalSData = Args.getLastArg(options::OPT_mlocal_sdata,
1701  options::OPT_mno_local_sdata);
1702  Arg *ExternSData = Args.getLastArg(options::OPT_mextern_sdata,
1703  options::OPT_mno_extern_sdata);
1704  Arg *EmbeddedData = Args.getLastArg(options::OPT_membedded_data,
1705  options::OPT_mno_embedded_data);
1706  if (LocalSData) {
1707  CmdArgs.push_back("-mllvm");
1708  if (LocalSData->getOption().matches(options::OPT_mlocal_sdata)) {
1709  CmdArgs.push_back("-mlocal-sdata=1");
1710  } else {
1711  CmdArgs.push_back("-mlocal-sdata=0");
1712  }
1713  LocalSData->claim();
1714  }
1715 
1716  if (ExternSData) {
1717  CmdArgs.push_back("-mllvm");
1718  if (ExternSData->getOption().matches(options::OPT_mextern_sdata)) {
1719  CmdArgs.push_back("-mextern-sdata=1");
1720  } else {
1721  CmdArgs.push_back("-mextern-sdata=0");
1722  }
1723  ExternSData->claim();
1724  }
1725 
1726  if (EmbeddedData) {
1727  CmdArgs.push_back("-mllvm");
1728  if (EmbeddedData->getOption().matches(options::OPT_membedded_data)) {
1729  CmdArgs.push_back("-membedded-data=1");
1730  } else {
1731  CmdArgs.push_back("-membedded-data=0");
1732  }
1733  EmbeddedData->claim();
1734  }
1735 
1736  } else if ((!ABICalls || (!NoABICalls && ABICalls)) && WantGPOpt)
1737  D.Diag(diag::warn_drv_unsupported_gpopt) << (ABICalls ? 0 : 1);
1738 
1739  if (GPOpt)
1740  GPOpt->claim();
1741 
1742  if (Arg *A = Args.getLastArg(options::OPT_mcompact_branches_EQ)) {
1743  StringRef Val = StringRef(A->getValue());
1744  if (mips::hasCompactBranches(CPUName)) {
1745  if (Val == "never" || Val == "always" || Val == "optimal") {
1746  CmdArgs.push_back("-mllvm");
1747  CmdArgs.push_back(Args.MakeArgString("-mips-compact-branches=" + Val));
1748  } else
1749  D.Diag(diag::err_drv_unsupported_option_argument)
1750  << A->getOption().getName() << Val;
1751  } else
1752  D.Diag(diag::warn_target_unsupported_compact_branches) << CPUName;
1753  }
1754 
1755  if (Arg *A = Args.getLastArg(options::OPT_mrelax_pic_calls,
1756  options::OPT_mno_relax_pic_calls)) {
1757  if (A->getOption().matches(options::OPT_mno_relax_pic_calls)) {
1758  CmdArgs.push_back("-mllvm");
1759  CmdArgs.push_back("-mips-jalr-reloc=0");
1760  }
1761  }
1762 }
1763 
1764 void Clang::AddPPCTargetArgs(const ArgList &Args,
1765  ArgStringList &CmdArgs) const {
1766  // Select the ABI to use.
1767  const char *ABIName = nullptr;
1768  if (getToolChain().getTriple().isOSLinux())
1769  switch (getToolChain().getArch()) {
1770  case llvm::Triple::ppc64: {
1771  // When targeting a processor that supports QPX, or if QPX is
1772  // specifically enabled, default to using the ABI that supports QPX (so
1773  // long as it is not specifically disabled).
1774  bool HasQPX = false;
1775  if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
1776  HasQPX = A->getValue() == StringRef("a2q");
1777  HasQPX = Args.hasFlag(options::OPT_mqpx, options::OPT_mno_qpx, HasQPX);
1778  if (HasQPX) {
1779  ABIName = "elfv1-qpx";
1780  break;
1781  }
1782 
1783  ABIName = "elfv1";
1784  break;
1785  }
1786  case llvm::Triple::ppc64le:
1787  ABIName = "elfv2";
1788  break;
1789  default:
1790  break;
1791  }
1792 
1793  if (Arg *A = Args.getLastArg(options::OPT_mabi_EQ))
1794  // The ppc64 linux abis are all "altivec" abis by default. Accept and ignore
1795  // the option if given as we don't have backend support for any targets
1796  // that don't use the altivec abi.
1797  if (StringRef(A->getValue()) != "altivec")
1798  ABIName = A->getValue();
1799 
1801  ppc::getPPCFloatABI(getToolChain().getDriver(), Args);
1802 
1803  if (FloatABI == ppc::FloatABI::Soft) {
1804  // Floating point operations and argument passing are soft.
1805  CmdArgs.push_back("-msoft-float");
1806  CmdArgs.push_back("-mfloat-abi");
1807  CmdArgs.push_back("soft");
1808  } else {
1809  // Floating point operations and argument passing are hard.
1810  assert(FloatABI == ppc::FloatABI::Hard && "Invalid float abi!");
1811  CmdArgs.push_back("-mfloat-abi");
1812  CmdArgs.push_back("hard");
1813  }
1814 
1815  if (ABIName) {
1816  CmdArgs.push_back("-target-abi");
1817  CmdArgs.push_back(ABIName);
1818  }
1819 }
1820 
1821 void Clang::AddRISCVTargetArgs(const ArgList &Args,
1822  ArgStringList &CmdArgs) const {
1823  // FIXME: currently defaults to the soft-float ABIs. Will need to be
1824  // expanded to select ilp32f, ilp32d, lp64f, lp64d when appropriate.
1825  const char *ABIName = nullptr;
1826  const llvm::Triple &Triple = getToolChain().getTriple();
1827  if (Arg *A = Args.getLastArg(options::OPT_mabi_EQ))
1828  ABIName = A->getValue();
1829  else if (Triple.getArch() == llvm::Triple::riscv32)
1830  ABIName = "ilp32";
1831  else if (Triple.getArch() == llvm::Triple::riscv64)
1832  ABIName = "lp64";
1833  else
1834  llvm_unreachable("Unexpected triple!");
1835 
1836  CmdArgs.push_back("-target-abi");
1837  CmdArgs.push_back(ABIName);
1838 }
1839 
1840 void Clang::AddSparcTargetArgs(const ArgList &Args,
1841  ArgStringList &CmdArgs) const {
1843  sparc::getSparcFloatABI(getToolChain().getDriver(), Args);
1844 
1845  if (FloatABI == sparc::FloatABI::Soft) {
1846  // Floating point operations and argument passing are soft.
1847  CmdArgs.push_back("-msoft-float");
1848  CmdArgs.push_back("-mfloat-abi");
1849  CmdArgs.push_back("soft");
1850  } else {
1851  // Floating point operations and argument passing are hard.
1852  assert(FloatABI == sparc::FloatABI::Hard && "Invalid float abi!");
1853  CmdArgs.push_back("-mfloat-abi");
1854  CmdArgs.push_back("hard");
1855  }
1856 }
1857 
1858 void Clang::AddSystemZTargetArgs(const ArgList &Args,
1859  ArgStringList &CmdArgs) const {
1860  if (Args.hasFlag(options::OPT_mbackchain, options::OPT_mno_backchain, false))
1861  CmdArgs.push_back("-mbackchain");
1862 }
1863 
1864 void Clang::AddX86TargetArgs(const ArgList &Args,
1865  ArgStringList &CmdArgs) const {
1866  if (!Args.hasFlag(options::OPT_mred_zone, options::OPT_mno_red_zone, true) ||
1867  Args.hasArg(options::OPT_mkernel) ||
1868  Args.hasArg(options::OPT_fapple_kext))
1869  CmdArgs.push_back("-disable-red-zone");
1870 
1871  if (!Args.hasFlag(options::OPT_mtls_direct_seg_refs,
1872  options::OPT_mno_tls_direct_seg_refs, true))
1873  CmdArgs.push_back("-mno-tls-direct-seg-refs");
1874 
1875  // Default to avoid implicit floating-point for kernel/kext code, but allow
1876  // that to be overridden with -mno-soft-float.
1877  bool NoImplicitFloat = (Args.hasArg(options::OPT_mkernel) ||
1878  Args.hasArg(options::OPT_fapple_kext));
1879  if (Arg *A = Args.getLastArg(
1880  options::OPT_msoft_float, options::OPT_mno_soft_float,
1881  options::OPT_mimplicit_float, options::OPT_mno_implicit_float)) {
1882  const Option &O = A->getOption();
1883  NoImplicitFloat = (O.matches(options::OPT_mno_implicit_float) ||
1884  O.matches(options::OPT_msoft_float));
1885  }
1886  if (NoImplicitFloat)
1887  CmdArgs.push_back("-no-implicit-float");
1888 
1889  if (Arg *A = Args.getLastArg(options::OPT_masm_EQ)) {
1890  StringRef Value = A->getValue();
1891  if (Value == "intel" || Value == "att") {
1892  CmdArgs.push_back("-mllvm");
1893  CmdArgs.push_back(Args.MakeArgString("-x86-asm-syntax=" + Value));
1894  } else {
1895  getToolChain().getDriver().Diag(diag::err_drv_unsupported_option_argument)
1896  << A->getOption().getName() << Value;
1897  }
1898  } else if (getToolChain().getDriver().IsCLMode()) {
1899  CmdArgs.push_back("-mllvm");
1900  CmdArgs.push_back("-x86-asm-syntax=intel");
1901  }
1902 
1903  // Set flags to support MCU ABI.
1904  if (Args.hasFlag(options::OPT_miamcu, options::OPT_mno_iamcu, false)) {
1905  CmdArgs.push_back("-mfloat-abi");
1906  CmdArgs.push_back("soft");
1907  CmdArgs.push_back("-mstack-alignment=4");
1908  }
1909 }
1910 
1911 void Clang::AddHexagonTargetArgs(const ArgList &Args,
1912  ArgStringList &CmdArgs) const {
1913  CmdArgs.push_back("-mqdsp6-compat");
1914  CmdArgs.push_back("-Wreturn-type");
1915 
1917  CmdArgs.push_back("-mllvm");
1918  CmdArgs.push_back(Args.MakeArgString("-hexagon-small-data-threshold=" +
1919  Twine(G.getValue())));
1920  }
1921 
1922  if (!Args.hasArg(options::OPT_fno_short_enums))
1923  CmdArgs.push_back("-fshort-enums");
1924  if (Args.getLastArg(options::OPT_mieee_rnd_near)) {
1925  CmdArgs.push_back("-mllvm");
1926  CmdArgs.push_back("-enable-hexagon-ieee-rnd-near");
1927  }
1928  CmdArgs.push_back("-mllvm");
1929  CmdArgs.push_back("-machine-sink-split=0");
1930 }
1931 
1932 void Clang::AddLanaiTargetArgs(const ArgList &Args,
1933  ArgStringList &CmdArgs) const {
1934  if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
1935  StringRef CPUName = A->getValue();
1936 
1937  CmdArgs.push_back("-target-cpu");
1938  CmdArgs.push_back(Args.MakeArgString(CPUName));
1939  }
1940  if (Arg *A = Args.getLastArg(options::OPT_mregparm_EQ)) {
1941  StringRef Value = A->getValue();
1942  // Only support mregparm=4 to support old usage. Report error for all other
1943  // cases.
1944  int Mregparm;
1945  if (Value.getAsInteger(10, Mregparm)) {
1946  if (Mregparm != 4) {
1947  getToolChain().getDriver().Diag(
1948  diag::err_drv_unsupported_option_argument)
1949  << A->getOption().getName() << Value;
1950  }
1951  }
1952  }
1953 }
1954 
1955 void Clang::AddWebAssemblyTargetArgs(const ArgList &Args,
1956  ArgStringList &CmdArgs) const {
1957  // Default to "hidden" visibility.
1958  if (!Args.hasArg(options::OPT_fvisibility_EQ,
1959  options::OPT_fvisibility_ms_compat)) {
1960  CmdArgs.push_back("-fvisibility");
1961  CmdArgs.push_back("hidden");
1962  }
1963 }
1964 
1965 void Clang::DumpCompilationDatabase(Compilation &C, StringRef Filename,
1966  StringRef Target, const InputInfo &Output,
1967  const InputInfo &Input, const ArgList &Args) const {
1968  // If this is a dry run, do not create the compilation database file.
1969  if (C.getArgs().hasArg(options::OPT__HASH_HASH_HASH))
1970  return;
1971 
1972  using llvm::yaml::escape;
1973  const Driver &D = getToolChain().getDriver();
1974 
1975  if (!CompilationDatabase) {
1976  std::error_code EC;
1977  auto File = llvm::make_unique<llvm::raw_fd_ostream>(Filename, EC, llvm::sys::fs::F_Text);
1978  if (EC) {
1979  D.Diag(clang::diag::err_drv_compilationdatabase) << Filename
1980  << EC.message();
1981  return;
1982  }
1983  CompilationDatabase = std::move(File);
1984  }
1985  auto &CDB = *CompilationDatabase;
1986  SmallString<128> Buf;
1987  if (llvm::sys::fs::current_path(Buf))
1988  Buf = ".";
1989  CDB << "{ \"directory\": \"" << escape(Buf) << "\"";
1990  CDB << ", \"file\": \"" << escape(Input.getFilename()) << "\"";
1991  CDB << ", \"output\": \"" << escape(Output.getFilename()) << "\"";
1992  CDB << ", \"arguments\": [\"" << escape(D.ClangExecutable) << "\"";
1993  Buf = "-x";
1994  Buf += types::getTypeName(Input.getType());
1995  CDB << ", \"" << escape(Buf) << "\"";
1996  if (!D.SysRoot.empty() && !Args.hasArg(options::OPT__sysroot_EQ)) {
1997  Buf = "--sysroot=";
1998  Buf += D.SysRoot;
1999  CDB << ", \"" << escape(Buf) << "\"";
2000  }
2001  CDB << ", \"" << escape(Input.getFilename()) << "\"";
2002  for (auto &A: Args) {
2003  auto &O = A->getOption();
2004  // Skip language selection, which is positional.
2005  if (O.getID() == options::OPT_x)
2006  continue;
2007  // Skip writing dependency output and the compilation database itself.
2008  if (O.getGroup().isValid() && O.getGroup().getID() == options::OPT_M_Group)
2009  continue;
2010  // Skip inputs.
2011  if (O.getKind() == Option::InputClass)
2012  continue;
2013  // All other arguments are quoted and appended.
2014  ArgStringList ASL;
2015  A->render(Args, ASL);
2016  for (auto &it: ASL)
2017  CDB << ", \"" << escape(it) << "\"";
2018  }
2019  Buf = "--target=";
2020  Buf += Target;
2021  CDB << ", \"" << escape(Buf) << "\"]},\n";
2022 }
2023 
2025  const ArgList &Args,
2026  ArgStringList &CmdArgs,
2027  const Driver &D) {
2028  if (UseRelaxAll(C, Args))
2029  CmdArgs.push_back("-mrelax-all");
2030 
2031  // Only default to -mincremental-linker-compatible if we think we are
2032  // targeting the MSVC linker.
2033  bool DefaultIncrementalLinkerCompatible =
2034  C.getDefaultToolChain().getTriple().isWindowsMSVCEnvironment();
2035  if (Args.hasFlag(options::OPT_mincremental_linker_compatible,
2036  options::OPT_mno_incremental_linker_compatible,
2037  DefaultIncrementalLinkerCompatible))
2038  CmdArgs.push_back("-mincremental-linker-compatible");
2039 
2040  switch (C.getDefaultToolChain().getArch()) {
2041  case llvm::Triple::arm:
2042  case llvm::Triple::armeb:
2043  case llvm::Triple::thumb:
2044  case llvm::Triple::thumbeb:
2045  if (Arg *A = Args.getLastArg(options::OPT_mimplicit_it_EQ)) {
2046  StringRef Value = A->getValue();
2047  if (Value == "always" || Value == "never" || Value == "arm" ||
2048  Value == "thumb") {
2049  CmdArgs.push_back("-mllvm");
2050  CmdArgs.push_back(Args.MakeArgString("-arm-implicit-it=" + Value));
2051  } else {
2052  D.Diag(diag::err_drv_unsupported_option_argument)
2053  << A->getOption().getName() << Value;
2054  }
2055  }
2056  break;
2057  default:
2058  break;
2059  }
2060 
2061  // When passing -I arguments to the assembler we sometimes need to
2062  // unconditionally take the next argument. For example, when parsing
2063  // '-Wa,-I -Wa,foo' we need to accept the -Wa,foo arg after seeing the
2064  // -Wa,-I arg and when parsing '-Wa,-I,foo' we need to accept the 'foo'
2065  // arg after parsing the '-I' arg.
2066  bool TakeNextArg = false;
2067 
2068  bool UseRelaxRelocations = C.getDefaultToolChain().useRelaxRelocations();
2069  bool UseNoExecStack = C.getDefaultToolChain().isNoExecStackDefault();
2070  const char *MipsTargetFeature = nullptr;
2071  for (const Arg *A :
2072  Args.filtered(options::OPT_Wa_COMMA, options::OPT_Xassembler)) {
2073  A->claim();
2074 
2075  for (StringRef Value : A->getValues()) {
2076  if (TakeNextArg) {
2077  CmdArgs.push_back(Value.data());
2078  TakeNextArg = false;
2079  continue;
2080  }
2081 
2082  if (C.getDefaultToolChain().getTriple().isOSBinFormatCOFF() &&
2083  Value == "-mbig-obj")
2084  continue; // LLVM handles bigobj automatically
2085 
2086  switch (C.getDefaultToolChain().getArch()) {
2087  default:
2088  break;
2089  case llvm::Triple::thumb:
2090  case llvm::Triple::thumbeb:
2091  case llvm::Triple::arm:
2092  case llvm::Triple::armeb:
2093  if (Value == "-mthumb")
2094  // -mthumb has already been processed in ComputeLLVMTriple()
2095  // recognize but skip over here.
2096  continue;
2097  break;
2098  case llvm::Triple::mips:
2099  case llvm::Triple::mipsel:
2100  case llvm::Triple::mips64:
2101  case llvm::Triple::mips64el:
2102  if (Value == "--trap") {
2103  CmdArgs.push_back("-target-feature");
2104  CmdArgs.push_back("+use-tcc-in-div");
2105  continue;
2106  }
2107  if (Value == "--break") {
2108  CmdArgs.push_back("-target-feature");
2109  CmdArgs.push_back("-use-tcc-in-div");
2110  continue;
2111  }
2112  if (Value.startswith("-msoft-float")) {
2113  CmdArgs.push_back("-target-feature");
2114  CmdArgs.push_back("+soft-float");
2115  continue;
2116  }
2117  if (Value.startswith("-mhard-float")) {
2118  CmdArgs.push_back("-target-feature");
2119  CmdArgs.push_back("-soft-float");
2120  continue;
2121  }
2122 
2123  MipsTargetFeature = llvm::StringSwitch<const char *>(Value)
2124  .Case("-mips1", "+mips1")
2125  .Case("-mips2", "+mips2")
2126  .Case("-mips3", "+mips3")
2127  .Case("-mips4", "+mips4")
2128  .Case("-mips5", "+mips5")
2129  .Case("-mips32", "+mips32")
2130  .Case("-mips32r2", "+mips32r2")
2131  .Case("-mips32r3", "+mips32r3")
2132  .Case("-mips32r5", "+mips32r5")
2133  .Case("-mips32r6", "+mips32r6")
2134  .Case("-mips64", "+mips64")
2135  .Case("-mips64r2", "+mips64r2")
2136  .Case("-mips64r3", "+mips64r3")
2137  .Case("-mips64r5", "+mips64r5")
2138  .Case("-mips64r6", "+mips64r6")
2139  .Default(nullptr);
2140  if (MipsTargetFeature)
2141  continue;
2142  }
2143 
2144  if (Value == "-force_cpusubtype_ALL") {
2145  // Do nothing, this is the default and we don't support anything else.
2146  } else if (Value == "-L") {
2147  CmdArgs.push_back("-msave-temp-labels");
2148  } else if (Value == "--fatal-warnings") {
2149  CmdArgs.push_back("-massembler-fatal-warnings");
2150  } else if (Value == "--noexecstack") {
2151  UseNoExecStack = true;
2152  } else if (Value.startswith("-compress-debug-sections") ||
2153  Value.startswith("--compress-debug-sections") ||
2154  Value == "-nocompress-debug-sections" ||
2155  Value == "--nocompress-debug-sections") {
2156  CmdArgs.push_back(Value.data());
2157  } else if (Value == "-mrelax-relocations=yes" ||
2158  Value == "--mrelax-relocations=yes") {
2159  UseRelaxRelocations = true;
2160  } else if (Value == "-mrelax-relocations=no" ||
2161  Value == "--mrelax-relocations=no") {
2162  UseRelaxRelocations = false;
2163  } else if (Value.startswith("-I")) {
2164  CmdArgs.push_back(Value.data());
2165  // We need to consume the next argument if the current arg is a plain
2166  // -I. The next arg will be the include directory.
2167  if (Value == "-I")
2168  TakeNextArg = true;
2169  } else if (Value.startswith("-gdwarf-")) {
2170  // "-gdwarf-N" options are not cc1as options.
2171  unsigned DwarfVersion = DwarfVersionNum(Value);
2172  if (DwarfVersion == 0) { // Send it onward, and let cc1as complain.
2173  CmdArgs.push_back(Value.data());
2174  } else {
2175  RenderDebugEnablingArgs(Args, CmdArgs,
2177  DwarfVersion, llvm::DebuggerKind::Default);
2178  }
2179  } else if (Value.startswith("-mcpu") || Value.startswith("-mfpu") ||
2180  Value.startswith("-mhwdiv") || Value.startswith("-march")) {
2181  // Do nothing, we'll validate it later.
2182  } else if (Value == "-defsym") {
2183  if (A->getNumValues() != 2) {
2184  D.Diag(diag::err_drv_defsym_invalid_format) << Value;
2185  break;
2186  }
2187  const char *S = A->getValue(1);
2188  auto Pair = StringRef(S).split('=');
2189  auto Sym = Pair.first;
2190  auto SVal = Pair.second;
2191 
2192  if (Sym.empty() || SVal.empty()) {
2193  D.Diag(diag::err_drv_defsym_invalid_format) << S;
2194  break;
2195  }
2196  int64_t IVal;
2197  if (SVal.getAsInteger(0, IVal)) {
2198  D.Diag(diag::err_drv_defsym_invalid_symval) << SVal;
2199  break;
2200  }
2201  CmdArgs.push_back(Value.data());
2202  TakeNextArg = true;
2203  } else if (Value == "-fdebug-compilation-dir") {
2204  CmdArgs.push_back("-fdebug-compilation-dir");
2205  TakeNextArg = true;
2206  } else {
2207  D.Diag(diag::err_drv_unsupported_option_argument)
2208  << A->getOption().getName() << Value;
2209  }
2210  }
2211  }
2212  if (UseRelaxRelocations)
2213  CmdArgs.push_back("--mrelax-relocations");
2214  if (UseNoExecStack)
2215  CmdArgs.push_back("-mnoexecstack");
2216  if (MipsTargetFeature != nullptr) {
2217  CmdArgs.push_back("-target-feature");
2218  CmdArgs.push_back(MipsTargetFeature);
2219  }
2220 
2221  // forward -fembed-bitcode to assmebler
2222  if (C.getDriver().embedBitcodeEnabled() ||
2224  Args.AddLastArg(CmdArgs, options::OPT_fembed_bitcode_EQ);
2225 }
2226 
2227 static void RenderFloatingPointOptions(const ToolChain &TC, const Driver &D,
2228  bool OFastEnabled, const ArgList &Args,
2229  ArgStringList &CmdArgs) {
2230  // Handle various floating point optimization flags, mapping them to the
2231  // appropriate LLVM code generation flags. This is complicated by several
2232  // "umbrella" flags, so we do this by stepping through the flags incrementally
2233  // adjusting what we think is enabled/disabled, then at the end setting the
2234  // LLVM flags based on the final state.
2235  bool HonorINFs = true;
2236  bool HonorNaNs = true;
2237  // -fmath-errno is the default on some platforms, e.g. BSD-derived OSes.
2238  bool MathErrno = TC.IsMathErrnoDefault();
2239  bool AssociativeMath = false;
2240  bool ReciprocalMath = false;
2241  bool SignedZeros = true;
2242  bool TrappingMath = true;
2243  StringRef DenormalFPMath = "";
2244  StringRef FPContract = "";
2245 
2246  if (const Arg *A = Args.getLastArg(options::OPT_flimited_precision_EQ)) {
2247  CmdArgs.push_back("-mlimit-float-precision");
2248  CmdArgs.push_back(A->getValue());
2249  }
2250 
2251  for (const Arg *A : Args) {
2252  switch (A->getOption().getID()) {
2253  // If this isn't an FP option skip the claim below
2254  default: continue;
2255 
2256  // Options controlling individual features
2257  case options::OPT_fhonor_infinities: HonorINFs = true; break;
2258  case options::OPT_fno_honor_infinities: HonorINFs = false; break;
2259  case options::OPT_fhonor_nans: HonorNaNs = true; break;
2260  case options::OPT_fno_honor_nans: HonorNaNs = false; break;
2261  case options::OPT_fmath_errno: MathErrno = true; break;
2262  case options::OPT_fno_math_errno: MathErrno = false; break;
2263  case options::OPT_fassociative_math: AssociativeMath = true; break;
2264  case options::OPT_fno_associative_math: AssociativeMath = false; break;
2265  case options::OPT_freciprocal_math: ReciprocalMath = true; break;
2266  case options::OPT_fno_reciprocal_math: ReciprocalMath = false; break;
2267  case options::OPT_fsigned_zeros: SignedZeros = true; break;
2268  case options::OPT_fno_signed_zeros: SignedZeros = false; break;
2269  case options::OPT_ftrapping_math: TrappingMath = true; break;
2270  case options::OPT_fno_trapping_math: TrappingMath = false; break;
2271 
2272  case options::OPT_fdenormal_fp_math_EQ:
2273  DenormalFPMath = A->getValue();
2274  break;
2275 
2276  // Validate and pass through -fp-contract option.
2277  case options::OPT_ffp_contract: {
2278  StringRef Val = A->getValue();
2279  if (Val == "fast" || Val == "on" || Val == "off")
2280  FPContract = Val;
2281  else
2282  D.Diag(diag::err_drv_unsupported_option_argument)
2283  << A->getOption().getName() << Val;
2284  break;
2285  }
2286 
2287  case options::OPT_ffinite_math_only:
2288  HonorINFs = false;
2289  HonorNaNs = false;
2290  break;
2291  case options::OPT_fno_finite_math_only:
2292  HonorINFs = true;
2293  HonorNaNs = true;
2294  break;
2295 
2296  case options::OPT_funsafe_math_optimizations:
2297  AssociativeMath = true;
2298  ReciprocalMath = true;
2299  SignedZeros = false;
2300  TrappingMath = false;
2301  break;
2302  case options::OPT_fno_unsafe_math_optimizations:
2303  AssociativeMath = false;
2304  ReciprocalMath = false;
2305  SignedZeros = true;
2306  TrappingMath = true;
2307  // -fno_unsafe_math_optimizations restores default denormal handling
2308  DenormalFPMath = "";
2309  break;
2310 
2311  case options::OPT_Ofast:
2312  // If -Ofast is the optimization level, then -ffast-math should be enabled
2313  if (!OFastEnabled)
2314  continue;
2315  LLVM_FALLTHROUGH;
2316  case options::OPT_ffast_math:
2317  HonorINFs = false;
2318  HonorNaNs = false;
2319  MathErrno = false;
2320  AssociativeMath = true;
2321  ReciprocalMath = true;
2322  SignedZeros = false;
2323  TrappingMath = false;
2324  // If fast-math is set then set the fp-contract mode to fast.
2325  FPContract = "fast";
2326  break;
2327  case options::OPT_fno_fast_math:
2328  HonorINFs = true;
2329  HonorNaNs = true;
2330  // Turning on -ffast-math (with either flag) removes the need for
2331  // MathErrno. However, turning *off* -ffast-math merely restores the
2332  // toolchain default (which may be false).
2333  MathErrno = TC.IsMathErrnoDefault();
2334  AssociativeMath = false;
2335  ReciprocalMath = false;
2336  SignedZeros = true;
2337  TrappingMath = true;
2338  // -fno_fast_math restores default denormal and fpcontract handling
2339  DenormalFPMath = "";
2340  FPContract = "";
2341  break;
2342  }
2343 
2344  // If we handled this option claim it
2345  A->claim();
2346  }
2347 
2348  if (!HonorINFs)
2349  CmdArgs.push_back("-menable-no-infs");
2350 
2351  if (!HonorNaNs)
2352  CmdArgs.push_back("-menable-no-nans");
2353 
2354  if (MathErrno)
2355  CmdArgs.push_back("-fmath-errno");
2356 
2357  if (!MathErrno && AssociativeMath && ReciprocalMath && !SignedZeros &&
2358  !TrappingMath)
2359  CmdArgs.push_back("-menable-unsafe-fp-math");
2360 
2361  if (!SignedZeros)
2362  CmdArgs.push_back("-fno-signed-zeros");
2363 
2364  if (AssociativeMath && !SignedZeros && !TrappingMath)
2365  CmdArgs.push_back("-mreassociate");
2366 
2367  if (ReciprocalMath)
2368  CmdArgs.push_back("-freciprocal-math");
2369 
2370  if (!TrappingMath)
2371  CmdArgs.push_back("-fno-trapping-math");
2372 
2373  if (!DenormalFPMath.empty())
2374  CmdArgs.push_back(
2375  Args.MakeArgString("-fdenormal-fp-math=" + DenormalFPMath));
2376 
2377  if (!FPContract.empty())
2378  CmdArgs.push_back(Args.MakeArgString("-ffp-contract=" + FPContract));
2379 
2380  ParseMRecip(D, Args, CmdArgs);
2381 
2382  // -ffast-math enables the __FAST_MATH__ preprocessor macro, but check for the
2383  // individual features enabled by -ffast-math instead of the option itself as
2384  // that's consistent with gcc's behaviour.
2385  if (!HonorINFs && !HonorNaNs && !MathErrno && AssociativeMath &&
2386  ReciprocalMath && !SignedZeros && !TrappingMath)
2387  CmdArgs.push_back("-ffast-math");
2388 
2389  // Handle __FINITE_MATH_ONLY__ similarly.
2390  if (!HonorINFs && !HonorNaNs)
2391  CmdArgs.push_back("-ffinite-math-only");
2392 
2393  if (const Arg *A = Args.getLastArg(options::OPT_mfpmath_EQ)) {
2394  CmdArgs.push_back("-mfpmath");
2395  CmdArgs.push_back(A->getValue());
2396  }
2397 
2398  // Disable a codegen optimization for floating-point casts.
2399  if (Args.hasFlag(options::OPT_fno_strict_float_cast_overflow,
2400  options::OPT_fstrict_float_cast_overflow, false))
2401  CmdArgs.push_back("-fno-strict-float-cast-overflow");
2402 }
2403 
2404 static void RenderAnalyzerOptions(const ArgList &Args, ArgStringList &CmdArgs,
2405  const llvm::Triple &Triple,
2406  const InputInfo &Input) {
2407  // Enable region store model by default.
2408  CmdArgs.push_back("-analyzer-store=region");
2409 
2410  // Treat blocks as analysis entry points.
2411  CmdArgs.push_back("-analyzer-opt-analyze-nested-blocks");
2412 
2413  // Add default argument set.
2414  if (!Args.hasArg(options::OPT__analyzer_no_default_checks)) {
2415  CmdArgs.push_back("-analyzer-checker=core");
2416  CmdArgs.push_back("-analyzer-checker=apiModeling");
2417 
2418  if (!Triple.isWindowsMSVCEnvironment()) {
2419  CmdArgs.push_back("-analyzer-checker=unix");
2420  } else {
2421  // Enable "unix" checkers that also work on Windows.
2422  CmdArgs.push_back("-analyzer-checker=unix.API");
2423  CmdArgs.push_back("-analyzer-checker=unix.Malloc");
2424  CmdArgs.push_back("-analyzer-checker=unix.MallocSizeof");
2425  CmdArgs.push_back("-analyzer-checker=unix.MismatchedDeallocator");
2426  CmdArgs.push_back("-analyzer-checker=unix.cstring.BadSizeArg");
2427  CmdArgs.push_back("-analyzer-checker=unix.cstring.NullArg");
2428  }
2429 
2430  // Disable some unix checkers for PS4.
2431  if (Triple.isPS4CPU()) {
2432  CmdArgs.push_back("-analyzer-disable-checker=unix.API");
2433  CmdArgs.push_back("-analyzer-disable-checker=unix.Vfork");
2434  }
2435 
2436  if (Triple.isOSDarwin())
2437  CmdArgs.push_back("-analyzer-checker=osx");
2438 
2439  CmdArgs.push_back("-analyzer-checker=deadcode");
2440 
2441  if (types::isCXX(Input.getType()))
2442  CmdArgs.push_back("-analyzer-checker=cplusplus");
2443 
2444  if (!Triple.isPS4CPU()) {
2445  CmdArgs.push_back("-analyzer-checker=security.insecureAPI.UncheckedReturn");
2446  CmdArgs.push_back("-analyzer-checker=security.insecureAPI.getpw");
2447  CmdArgs.push_back("-analyzer-checker=security.insecureAPI.gets");
2448  CmdArgs.push_back("-analyzer-checker=security.insecureAPI.mktemp");
2449  CmdArgs.push_back("-analyzer-checker=security.insecureAPI.mkstemp");
2450  CmdArgs.push_back("-analyzer-checker=security.insecureAPI.vfork");
2451  }
2452 
2453  // Default nullability checks.
2454  CmdArgs.push_back("-analyzer-checker=nullability.NullPassedToNonnull");
2455  CmdArgs.push_back("-analyzer-checker=nullability.NullReturnedFromNonnull");
2456  }
2457 
2458  // Set the output format. The default is plist, for (lame) historical reasons.
2459  CmdArgs.push_back("-analyzer-output");
2460  if (Arg *A = Args.getLastArg(options::OPT__analyzer_output))
2461  CmdArgs.push_back(A->getValue());
2462  else
2463  CmdArgs.push_back("plist");
2464 
2465  // Disable the presentation of standard compiler warnings when using
2466  // --analyze. We only want to show static analyzer diagnostics or frontend
2467  // errors.
2468  CmdArgs.push_back("-w");
2469 
2470  // Add -Xanalyzer arguments when running as analyzer.
2471  Args.AddAllArgValues(CmdArgs, options::OPT_Xanalyzer);
2472 }
2473 
2474 static void RenderSSPOptions(const ToolChain &TC, const ArgList &Args,
2475  ArgStringList &CmdArgs, bool KernelOrKext) {
2476  const llvm::Triple &EffectiveTriple = TC.getEffectiveTriple();
2477 
2478  // NVPTX doesn't support stack protectors; from the compiler's perspective, it
2479  // doesn't even have a stack!
2480  if (EffectiveTriple.isNVPTX())
2481  return;
2482 
2483  // -stack-protector=0 is default.
2484  unsigned StackProtectorLevel = 0;
2485  unsigned DefaultStackProtectorLevel =
2486  TC.GetDefaultStackProtectorLevel(KernelOrKext);
2487 
2488  if (Arg *A = Args.getLastArg(options::OPT_fno_stack_protector,
2489  options::OPT_fstack_protector_all,
2490  options::OPT_fstack_protector_strong,
2491  options::OPT_fstack_protector)) {
2492  if (A->getOption().matches(options::OPT_fstack_protector))
2493  StackProtectorLevel =
2494  std::max<unsigned>(LangOptions::SSPOn, DefaultStackProtectorLevel);
2495  else if (A->getOption().matches(options::OPT_fstack_protector_strong))
2496  StackProtectorLevel = LangOptions::SSPStrong;
2497  else if (A->getOption().matches(options::OPT_fstack_protector_all))
2498  StackProtectorLevel = LangOptions::SSPReq;
2499  } else {
2500  StackProtectorLevel = DefaultStackProtectorLevel;
2501  }
2502 
2503  if (StackProtectorLevel) {
2504  CmdArgs.push_back("-stack-protector");
2505  CmdArgs.push_back(Args.MakeArgString(Twine(StackProtectorLevel)));
2506  }
2507 
2508  // --param ssp-buffer-size=
2509  for (const Arg *A : Args.filtered(options::OPT__param)) {
2510  StringRef Str(A->getValue());
2511  if (Str.startswith("ssp-buffer-size=")) {
2512  if (StackProtectorLevel) {
2513  CmdArgs.push_back("-stack-protector-buffer-size");
2514  // FIXME: Verify the argument is a valid integer.
2515  CmdArgs.push_back(Args.MakeArgString(Str.drop_front(16)));
2516  }
2517  A->claim();
2518  }
2519  }
2520 }
2521 
2523  const ToolChain &TC,
2524  const ArgList &Args,
2525  ArgStringList &CmdArgs) {
2526  auto DefaultTrivialAutoVarInit = TC.GetDefaultTrivialAutoVarInit();
2527  StringRef TrivialAutoVarInit = "";
2528 
2529  for (const Arg *A : Args) {
2530  switch (A->getOption().getID()) {
2531  default:
2532  continue;
2533  case options::OPT_ftrivial_auto_var_init: {
2534  A->claim();
2535  StringRef Val = A->getValue();
2536  if (Val == "uninitialized" || Val == "zero" || Val == "pattern")
2537  TrivialAutoVarInit = Val;
2538  else
2539  D.Diag(diag::err_drv_unsupported_option_argument)
2540  << A->getOption().getName() << Val;
2541  break;
2542  }
2543  }
2544  }
2545 
2546  if (TrivialAutoVarInit.empty())
2547  switch (DefaultTrivialAutoVarInit) {
2549  break;
2551  TrivialAutoVarInit = "pattern";
2552  break;
2554  TrivialAutoVarInit = "zero";
2555  break;
2556  }
2557 
2558  if (!TrivialAutoVarInit.empty()) {
2559  if (TrivialAutoVarInit == "zero" && !Args.hasArg(options::OPT_enable_trivial_var_init_zero))
2560  D.Diag(diag::err_drv_trivial_auto_var_init_zero_disabled);
2561  CmdArgs.push_back(
2562  Args.MakeArgString("-ftrivial-auto-var-init=" + TrivialAutoVarInit));
2563  }
2564 }
2565 
2566 static void RenderOpenCLOptions(const ArgList &Args, ArgStringList &CmdArgs) {
2567  const unsigned ForwardedArguments[] = {
2568  options::OPT_cl_opt_disable,
2569  options::OPT_cl_strict_aliasing,
2570  options::OPT_cl_single_precision_constant,
2571  options::OPT_cl_finite_math_only,
2572  options::OPT_cl_kernel_arg_info,
2573  options::OPT_cl_unsafe_math_optimizations,
2574  options::OPT_cl_fast_relaxed_math,
2575  options::OPT_cl_mad_enable,
2576  options::OPT_cl_no_signed_zeros,
2577  options::OPT_cl_denorms_are_zero,
2578  options::OPT_cl_fp32_correctly_rounded_divide_sqrt,
2579  options::OPT_cl_uniform_work_group_size
2580  };
2581 
2582  if (Arg *A = Args.getLastArg(options::OPT_cl_std_EQ)) {
2583  std::string CLStdStr = std::string("-cl-std=") + A->getValue();
2584  CmdArgs.push_back(Args.MakeArgString(CLStdStr));
2585  }
2586 
2587  for (const auto &Arg : ForwardedArguments)
2588  if (const auto *A = Args.getLastArg(Arg))
2589  CmdArgs.push_back(Args.MakeArgString(A->getOption().getPrefixedName()));
2590 }
2591 
2592 static void RenderARCMigrateToolOptions(const Driver &D, const ArgList &Args,
2593  ArgStringList &CmdArgs) {
2594  bool ARCMTEnabled = false;
2595  if (!Args.hasArg(options::OPT_fno_objc_arc, options::OPT_fobjc_arc)) {
2596  if (const Arg *A = Args.getLastArg(options::OPT_ccc_arcmt_check,
2597  options::OPT_ccc_arcmt_modify,
2598  options::OPT_ccc_arcmt_migrate)) {
2599  ARCMTEnabled = true;
2600  switch (A->getOption().getID()) {
2601  default: llvm_unreachable("missed a case");
2602  case options::OPT_ccc_arcmt_check:
2603  CmdArgs.push_back("-arcmt-check");
2604  break;
2605  case options::OPT_ccc_arcmt_modify:
2606  CmdArgs.push_back("-arcmt-modify");
2607  break;
2608  case options::OPT_ccc_arcmt_migrate:
2609  CmdArgs.push_back("-arcmt-migrate");
2610  CmdArgs.push_back("-mt-migrate-directory");
2611  CmdArgs.push_back(A->getValue());
2612 
2613  Args.AddLastArg(CmdArgs, options::OPT_arcmt_migrate_report_output);
2614  Args.AddLastArg(CmdArgs, options::OPT_arcmt_migrate_emit_arc_errors);
2615  break;
2616  }
2617  }
2618  } else {
2619  Args.ClaimAllArgs(options::OPT_ccc_arcmt_check);
2620  Args.ClaimAllArgs(options::OPT_ccc_arcmt_modify);
2621  Args.ClaimAllArgs(options::OPT_ccc_arcmt_migrate);
2622  }
2623 
2624  if (const Arg *A = Args.getLastArg(options::OPT_ccc_objcmt_migrate)) {
2625  if (ARCMTEnabled)
2626  D.Diag(diag::err_drv_argument_not_allowed_with)
2627  << A->getAsString(Args) << "-ccc-arcmt-migrate";
2628 
2629  CmdArgs.push_back("-mt-migrate-directory");
2630  CmdArgs.push_back(A->getValue());
2631 
2632  if (!Args.hasArg(options::OPT_objcmt_migrate_literals,
2633  options::OPT_objcmt_migrate_subscripting,
2634  options::OPT_objcmt_migrate_property)) {
2635  // None specified, means enable them all.
2636  CmdArgs.push_back("-objcmt-migrate-literals");
2637  CmdArgs.push_back("-objcmt-migrate-subscripting");
2638  CmdArgs.push_back("-objcmt-migrate-property");
2639  } else {
2640  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_literals);
2641  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_subscripting);
2642  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_property);
2643  }
2644  } else {
2645  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_literals);
2646  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_subscripting);
2647  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_property);
2648  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_all);
2649  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_readonly_property);
2650  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_readwrite_property);
2651  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_property_dot_syntax);
2652  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_annotation);
2653  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_instancetype);
2654  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_nsmacros);
2655  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_protocol_conformance);
2656  Args.AddLastArg(CmdArgs, options::OPT_objcmt_atomic_property);
2657  Args.AddLastArg(CmdArgs, options::OPT_objcmt_returns_innerpointer_property);
2658  Args.AddLastArg(CmdArgs, options::OPT_objcmt_ns_nonatomic_iosonly);
2659  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_designated_init);
2660  Args.AddLastArg(CmdArgs, options::OPT_objcmt_whitelist_dir_path);
2661  }
2662 }
2663 
2664 static void RenderBuiltinOptions(const ToolChain &TC, const llvm::Triple &T,
2665  const ArgList &Args, ArgStringList &CmdArgs) {
2666  // -fbuiltin is default unless -mkernel is used.
2667  bool UseBuiltins =
2668  Args.hasFlag(options::OPT_fbuiltin, options::OPT_fno_builtin,
2669  !Args.hasArg(options::OPT_mkernel));
2670  if (!UseBuiltins)
2671  CmdArgs.push_back("-fno-builtin");
2672 
2673  // -ffreestanding implies -fno-builtin.
2674  if (Args.hasArg(options::OPT_ffreestanding))
2675  UseBuiltins = false;
2676 
2677  // Process the -fno-builtin-* options.
2678  for (const auto &Arg : Args) {
2679  const Option &O = Arg->getOption();
2680  if (!O.matches(options::OPT_fno_builtin_))
2681  continue;
2682 
2683  Arg->claim();
2684 
2685  // If -fno-builtin is specified, then there's no need to pass the option to
2686  // the frontend.
2687  if (!UseBuiltins)
2688  continue;
2689 
2690  StringRef FuncName = Arg->getValue();
2691  CmdArgs.push_back(Args.MakeArgString("-fno-builtin-" + FuncName));
2692  }
2693 
2694  // le32-specific flags:
2695  // -fno-math-builtin: clang should not convert math builtins to intrinsics
2696  // by default.
2697  if (TC.getArch() == llvm::Triple::le32)
2698  CmdArgs.push_back("-fno-math-builtin");
2699 }
2700 
2702  llvm::sys::path::system_temp_directory(/*erasedOnReboot=*/false, Result);
2703  llvm::sys::path::append(Result, "org.llvm.clang.");
2704  appendUserToPath(Result);
2705  llvm::sys::path::append(Result, "ModuleCache");
2706 }
2707 
2708 static void RenderModulesOptions(Compilation &C, const Driver &D,
2709  const ArgList &Args, const InputInfo &Input,
2710  const InputInfo &Output,
2711  ArgStringList &CmdArgs, bool &HaveModules) {
2712  // -fmodules enables the use of precompiled modules (off by default).
2713  // Users can pass -fno-cxx-modules to turn off modules support for
2714  // C++/Objective-C++ programs.
2715  bool HaveClangModules = false;
2716  if (Args.hasFlag(options::OPT_fmodules, options::OPT_fno_modules, false)) {
2717  bool AllowedInCXX = Args.hasFlag(options::OPT_fcxx_modules,
2718  options::OPT_fno_cxx_modules, true);
2719  if (AllowedInCXX || !types::isCXX(Input.getType())) {
2720  CmdArgs.push_back("-fmodules");
2721  HaveClangModules = true;
2722  }
2723  }
2724 
2725  HaveModules |= HaveClangModules;
2726  if (Args.hasArg(options::OPT_fmodules_ts)) {
2727  CmdArgs.push_back("-fmodules-ts");
2728  HaveModules = true;
2729  }
2730 
2731  // -fmodule-maps enables implicit reading of module map files. By default,
2732  // this is enabled if we are using Clang's flavor of precompiled modules.
2733  if (Args.hasFlag(options::OPT_fimplicit_module_maps,
2734  options::OPT_fno_implicit_module_maps, HaveClangModules))
2735  CmdArgs.push_back("-fimplicit-module-maps");
2736 
2737  // -fmodules-decluse checks that modules used are declared so (off by default)
2738  if (Args.hasFlag(options::OPT_fmodules_decluse,
2739  options::OPT_fno_modules_decluse, false))
2740  CmdArgs.push_back("-fmodules-decluse");
2741 
2742  // -fmodules-strict-decluse is like -fmodule-decluse, but also checks that
2743  // all #included headers are part of modules.
2744  if (Args.hasFlag(options::OPT_fmodules_strict_decluse,
2745  options::OPT_fno_modules_strict_decluse, false))
2746  CmdArgs.push_back("-fmodules-strict-decluse");
2747 
2748  // -fno-implicit-modules turns off implicitly compiling modules on demand.
2749  bool ImplicitModules = false;
2750  if (!Args.hasFlag(options::OPT_fimplicit_modules,
2751  options::OPT_fno_implicit_modules, HaveClangModules)) {
2752  if (HaveModules)
2753  CmdArgs.push_back("-fno-implicit-modules");
2754  } else if (HaveModules) {
2755  ImplicitModules = true;
2756  // -fmodule-cache-path specifies where our implicitly-built module files
2757  // should be written.
2758  SmallString<128> Path;
2759  if (Arg *A = Args.getLastArg(options::OPT_fmodules_cache_path))
2760  Path = A->getValue();
2761 
2762  if (C.isForDiagnostics()) {
2763  // When generating crash reports, we want to emit the modules along with
2764  // the reproduction sources, so we ignore any provided module path.
2765  Path = Output.getFilename();
2766  llvm::sys::path::replace_extension(Path, ".cache");
2767  llvm::sys::path::append(Path, "modules");
2768  } else if (Path.empty()) {
2769  // No module path was provided: use the default.
2771  }
2772 
2773  const char Arg[] = "-fmodules-cache-path=";
2774  Path.insert(Path.begin(), Arg, Arg + strlen(Arg));
2775  CmdArgs.push_back(Args.MakeArgString(Path));
2776  }
2777 
2778  if (HaveModules) {
2779  // -fprebuilt-module-path specifies where to load the prebuilt module files.
2780  for (const Arg *A : Args.filtered(options::OPT_fprebuilt_module_path)) {
2781  CmdArgs.push_back(Args.MakeArgString(
2782  std::string("-fprebuilt-module-path=") + A->getValue()));
2783  A->claim();
2784  }
2785  }
2786 
2787  // -fmodule-name specifies the module that is currently being built (or
2788  // used for header checking by -fmodule-maps).
2789  Args.AddLastArg(CmdArgs, options::OPT_fmodule_name_EQ);
2790 
2791  // -fmodule-map-file can be used to specify files containing module
2792  // definitions.
2793  Args.AddAllArgs(CmdArgs, options::OPT_fmodule_map_file);
2794 
2795  // -fbuiltin-module-map can be used to load the clang
2796  // builtin headers modulemap file.
2797  if (Args.hasArg(options::OPT_fbuiltin_module_map)) {
2798  SmallString<128> BuiltinModuleMap(D.ResourceDir);
2799  llvm::sys::path::append(BuiltinModuleMap, "include");
2800  llvm::sys::path::append(BuiltinModuleMap, "module.modulemap");
2801  if (llvm::sys::fs::exists(BuiltinModuleMap))
2802  CmdArgs.push_back(
2803  Args.MakeArgString("-fmodule-map-file=" + BuiltinModuleMap));
2804  }
2805 
2806  // The -fmodule-file=<name>=<file> form specifies the mapping of module
2807  // names to precompiled module files (the module is loaded only if used).
2808  // The -fmodule-file=<file> form can be used to unconditionally load
2809  // precompiled module files (whether used or not).
2810  if (HaveModules)
2811  Args.AddAllArgs(CmdArgs, options::OPT_fmodule_file);
2812  else
2813  Args.ClaimAllArgs(options::OPT_fmodule_file);
2814 
2815  // When building modules and generating crashdumps, we need to dump a module
2816  // dependency VFS alongside the output.
2817  if (HaveClangModules && C.isForDiagnostics()) {
2818  SmallString<128> VFSDir(Output.getFilename());
2819  llvm::sys::path::replace_extension(VFSDir, ".cache");
2820  // Add the cache directory as a temp so the crash diagnostics pick it up.
2821  C.addTempFile(Args.MakeArgString(VFSDir));
2822 
2823  llvm::sys::path::append(VFSDir, "vfs");
2824  CmdArgs.push_back("-module-dependency-dir");
2825  CmdArgs.push_back(Args.MakeArgString(VFSDir));
2826  }
2827 
2828  if (HaveClangModules)
2829  Args.AddLastArg(CmdArgs, options::OPT_fmodules_user_build_path);
2830 
2831  // Pass through all -fmodules-ignore-macro arguments.
2832  Args.AddAllArgs(CmdArgs, options::OPT_fmodules_ignore_macro);
2833  Args.AddLastArg(CmdArgs, options::OPT_fmodules_prune_interval);
2834  Args.AddLastArg(CmdArgs, options::OPT_fmodules_prune_after);
2835 
2836  Args.AddLastArg(CmdArgs, options::OPT_fbuild_session_timestamp);
2837 
2838  if (Arg *A = Args.getLastArg(options::OPT_fbuild_session_file)) {
2839  if (Args.hasArg(options::OPT_fbuild_session_timestamp))
2840  D.Diag(diag::err_drv_argument_not_allowed_with)
2841  << A->getAsString(Args) << "-fbuild-session-timestamp";
2842 
2843  llvm::sys::fs::file_status Status;
2844  if (llvm::sys::fs::status(A->getValue(), Status))
2845  D.Diag(diag::err_drv_no_such_file) << A->getValue();
2846  CmdArgs.push_back(
2847  Args.MakeArgString("-fbuild-session-timestamp=" +
2848  Twine((uint64_t)Status.getLastModificationTime()
2849  .time_since_epoch()
2850  .count())));
2851  }
2852 
2853  if (Args.getLastArg(options::OPT_fmodules_validate_once_per_build_session)) {
2854  if (!Args.getLastArg(options::OPT_fbuild_session_timestamp,
2855  options::OPT_fbuild_session_file))
2856  D.Diag(diag::err_drv_modules_validate_once_requires_timestamp);
2857 
2858  Args.AddLastArg(CmdArgs,
2859  options::OPT_fmodules_validate_once_per_build_session);
2860  }
2861 
2862  if (Args.hasFlag(options::OPT_fmodules_validate_system_headers,
2863  options::OPT_fno_modules_validate_system_headers,
2864  ImplicitModules))
2865  CmdArgs.push_back("-fmodules-validate-system-headers");
2866 
2867  Args.AddLastArg(CmdArgs, options::OPT_fmodules_disable_diagnostic_validation);
2868 }
2869 
2870 static void RenderCharacterOptions(const ArgList &Args, const llvm::Triple &T,
2871  ArgStringList &CmdArgs) {
2872  // -fsigned-char is default.
2873  if (const Arg *A = Args.getLastArg(options::OPT_fsigned_char,
2874  options::OPT_fno_signed_char,
2875  options::OPT_funsigned_char,
2876  options::OPT_fno_unsigned_char)) {
2877  if (A->getOption().matches(options::OPT_funsigned_char) ||
2878  A->getOption().matches(options::OPT_fno_signed_char)) {
2879  CmdArgs.push_back("-fno-signed-char");
2880  }
2881  } else if (!isSignedCharDefault(T)) {
2882  CmdArgs.push_back("-fno-signed-char");
2883  }
2884 
2885  // The default depends on the language standard.
2886  if (const Arg *A =
2887  Args.getLastArg(options::OPT_fchar8__t, options::OPT_fno_char8__t))
2888  A->render(Args, CmdArgs);
2889 
2890  if (const Arg *A = Args.getLastArg(options::OPT_fshort_wchar,
2891  options::OPT_fno_short_wchar)) {
2892  if (A->getOption().matches(options::OPT_fshort_wchar)) {
2893  CmdArgs.push_back("-fwchar-type=short");
2894  CmdArgs.push_back("-fno-signed-wchar");
2895  } else {
2896  bool IsARM = T.isARM() || T.isThumb() || T.isAArch64();
2897  CmdArgs.push_back("-fwchar-type=int");
2898  if (IsARM && !(T.isOSWindows() || T.isOSNetBSD() ||
2899  T.isOSOpenBSD()))
2900  CmdArgs.push_back("-fno-signed-wchar");
2901  else
2902  CmdArgs.push_back("-fsigned-wchar");
2903  }
2904  }
2905 }
2906 
2907 static void RenderObjCOptions(const ToolChain &TC, const Driver &D,
2908  const llvm::Triple &T, const ArgList &Args,
2909  ObjCRuntime &Runtime, bool InferCovariantReturns,
2910  const InputInfo &Input, ArgStringList &CmdArgs) {
2911  const llvm::Triple::ArchType Arch = TC.getArch();
2912 
2913  // -fobjc-dispatch-method is only relevant with the nonfragile-abi, and legacy
2914  // is the default. Except for deployment target of 10.5, next runtime is
2915  // always legacy dispatch and -fno-objc-legacy-dispatch gets ignored silently.
2916  if (Runtime.isNonFragile()) {
2917  if (!Args.hasFlag(options::OPT_fobjc_legacy_dispatch,
2918  options::OPT_fno_objc_legacy_dispatch,
2919  Runtime.isLegacyDispatchDefaultForArch(Arch))) {
2920  if (TC.UseObjCMixedDispatch())
2921  CmdArgs.push_back("-fobjc-dispatch-method=mixed");
2922  else
2923  CmdArgs.push_back("-fobjc-dispatch-method=non-legacy");
2924  }
2925  }
2926 
2927  // When ObjectiveC legacy runtime is in effect on MacOSX, turn on the option
2928  // to do Array/Dictionary subscripting by default.
2929  if (Arch == llvm::Triple::x86 && T.isMacOSX() &&
2930  Runtime.getKind() == ObjCRuntime::FragileMacOSX && Runtime.isNeXTFamily())
2931  CmdArgs.push_back("-fobjc-subscripting-legacy-runtime");
2932 
2933  // Allow -fno-objc-arr to trump -fobjc-arr/-fobjc-arc.
2934  // NOTE: This logic is duplicated in ToolChains.cpp.
2935  if (isObjCAutoRefCount(Args)) {
2936  TC.CheckObjCARC();
2937 
2938  CmdArgs.push_back("-fobjc-arc");
2939 
2940  // FIXME: It seems like this entire block, and several around it should be
2941  // wrapped in isObjC, but for now we just use it here as this is where it
2942  // was being used previously.
2943  if (types::isCXX(Input.getType()) && types::isObjC(Input.getType())) {
2944  if (TC.GetCXXStdlibType(Args) == ToolChain::CST_Libcxx)
2945  CmdArgs.push_back("-fobjc-arc-cxxlib=libc++");
2946  else
2947  CmdArgs.push_back("-fobjc-arc-cxxlib=libstdc++");
2948  }
2949 
2950  // Allow the user to enable full exceptions code emission.
2951  // We default off for Objective-C, on for Objective-C++.
2952  if (Args.hasFlag(options::OPT_fobjc_arc_exceptions,
2953  options::OPT_fno_objc_arc_exceptions,
2954  /*default=*/types::isCXX(Input.getType())))
2955  CmdArgs.push_back("-fobjc-arc-exceptions");
2956  }
2957 
2958  // Silence warning for full exception code emission options when explicitly
2959  // set to use no ARC.
2960  if (Args.hasArg(options::OPT_fno_objc_arc)) {
2961  Args.ClaimAllArgs(options::OPT_fobjc_arc_exceptions);
2962  Args.ClaimAllArgs(options::OPT_fno_objc_arc_exceptions);
2963  }
2964 
2965  // Allow the user to control whether messages can be converted to runtime
2966  // functions.
2967  if (types::isObjC(Input.getType())) {
2968  auto *Arg = Args.getLastArg(
2969  options::OPT_fobjc_convert_messages_to_runtime_calls,
2970  options::OPT_fno_objc_convert_messages_to_runtime_calls);
2971  if (Arg &&
2972  Arg->getOption().matches(
2973  options::OPT_fno_objc_convert_messages_to_runtime_calls))
2974  CmdArgs.push_back("-fno-objc-convert-messages-to-runtime-calls");
2975  }
2976 
2977  // -fobjc-infer-related-result-type is the default, except in the Objective-C
2978  // rewriter.
2979  if (InferCovariantReturns)
2980  CmdArgs.push_back("-fno-objc-infer-related-result-type");
2981 
2982  // Pass down -fobjc-weak or -fno-objc-weak if present.
2983  if (types::isObjC(Input.getType())) {
2984  auto WeakArg =
2985  Args.getLastArg(options::OPT_fobjc_weak, options::OPT_fno_objc_weak);
2986  if (!WeakArg) {
2987  // nothing to do
2988  } else if (!Runtime.allowsWeak()) {
2989  if (WeakArg->getOption().matches(options::OPT_fobjc_weak))
2990  D.Diag(diag::err_objc_weak_unsupported);
2991  } else {
2992  WeakArg->render(Args, CmdArgs);
2993  }
2994  }
2995 }
2996 
2997 static void RenderDiagnosticsOptions(const Driver &D, const ArgList &Args,
2998  ArgStringList &CmdArgs) {
2999  bool CaretDefault = true;
3000  bool ColumnDefault = true;
3001 
3002  if (const Arg *A = Args.getLastArg(options::OPT__SLASH_diagnostics_classic,
3003  options::OPT__SLASH_diagnostics_column,
3004  options::OPT__SLASH_diagnostics_caret)) {
3005  switch (A->getOption().getID()) {
3006  case options::OPT__SLASH_diagnostics_caret:
3007  CaretDefault = true;
3008  ColumnDefault = true;
3009  break;
3010  case options::OPT__SLASH_diagnostics_column:
3011  CaretDefault = false;
3012  ColumnDefault = true;
3013  break;
3014  case options::OPT__SLASH_diagnostics_classic:
3015  CaretDefault = false;
3016  ColumnDefault = false;
3017  break;
3018  }
3019  }
3020 
3021  // -fcaret-diagnostics is default.
3022  if (!Args.hasFlag(options::OPT_fcaret_diagnostics,
3023  options::OPT_fno_caret_diagnostics, CaretDefault))
3024  CmdArgs.push_back("-fno-caret-diagnostics");
3025 
3026  // -fdiagnostics-fixit-info is default, only pass non-default.
3027  if (!Args.hasFlag(options::OPT_fdiagnostics_fixit_info,
3028  options::OPT_fno_diagnostics_fixit_info))
3029  CmdArgs.push_back("-fno-diagnostics-fixit-info");
3030 
3031  // Enable -fdiagnostics-show-option by default.
3032  if (Args.hasFlag(options::OPT_fdiagnostics_show_option,
3033  options::OPT_fno_diagnostics_show_option))
3034  CmdArgs.push_back("-fdiagnostics-show-option");
3035 
3036  if (const Arg *A =
3037  Args.getLastArg(options::OPT_fdiagnostics_show_category_EQ)) {
3038  CmdArgs.push_back("-fdiagnostics-show-category");
3039  CmdArgs.push_back(A->getValue());
3040  }
3041 
3042  if (Args.hasFlag(options::OPT_fdiagnostics_show_hotness,
3043  options::OPT_fno_diagnostics_show_hotness, false))
3044  CmdArgs.push_back("-fdiagnostics-show-hotness");
3045 
3046  if (const Arg *A =
3047  Args.getLastArg(options::OPT_fdiagnostics_hotness_threshold_EQ)) {
3048  std::string Opt =
3049  std::string("-fdiagnostics-hotness-threshold=") + A->getValue();
3050  CmdArgs.push_back(Args.MakeArgString(Opt));
3051  }
3052 
3053  if (const Arg *A = Args.getLastArg(options::OPT_fdiagnostics_format_EQ)) {
3054  CmdArgs.push_back("-fdiagnostics-format");
3055  CmdArgs.push_back(A->getValue());
3056  }
3057 
3058  if (const Arg *A = Args.getLastArg(
3059  options::OPT_fdiagnostics_show_note_include_stack,
3060  options::OPT_fno_diagnostics_show_note_include_stack)) {
3061  const Option &O = A->getOption();
3062  if (O.matches(options::OPT_fdiagnostics_show_note_include_stack))
3063  CmdArgs.push_back("-fdiagnostics-show-note-include-stack");
3064  else
3065  CmdArgs.push_back("-fno-diagnostics-show-note-include-stack");
3066  }
3067 
3068  // Color diagnostics are parsed by the driver directly from argv and later
3069  // re-parsed to construct this job; claim any possible color diagnostic here
3070  // to avoid warn_drv_unused_argument and diagnose bad
3071  // OPT_fdiagnostics_color_EQ values.
3072  for (const Arg *A : Args) {
3073  const Option &O = A->getOption();
3074  if (!O.matches(options::OPT_fcolor_diagnostics) &&
3075  !O.matches(options::OPT_fdiagnostics_color) &&
3076  !O.matches(options::OPT_fno_color_diagnostics) &&
3077  !O.matches(options::OPT_fno_diagnostics_color) &&
3078  !O.matches(options::OPT_fdiagnostics_color_EQ))
3079  continue;
3080 
3081  if (O.matches(options::OPT_fdiagnostics_color_EQ)) {
3082  StringRef Value(A->getValue());
3083  if (Value != "always" && Value != "never" && Value != "auto")
3084  D.Diag(diag::err_drv_clang_unsupported)
3085  << ("-fdiagnostics-color=" + Value).str();
3086  }
3087  A->claim();
3088  }
3089 
3090  if (D.getDiags().getDiagnosticOptions().ShowColors)
3091  CmdArgs.push_back("-fcolor-diagnostics");
3092 
3093  if (Args.hasArg(options::OPT_fansi_escape_codes))
3094  CmdArgs.push_back("-fansi-escape-codes");
3095 
3096  if (!Args.hasFlag(options::OPT_fshow_source_location,
3097  options::OPT_fno_show_source_location))
3098  CmdArgs.push_back("-fno-show-source-location");
3099 
3100  if (Args.hasArg(options::OPT_fdiagnostics_absolute_paths))
3101  CmdArgs.push_back("-fdiagnostics-absolute-paths");
3102 
3103  if (!Args.hasFlag(options::OPT_fshow_column, options::OPT_fno_show_column,
3104  ColumnDefault))
3105  CmdArgs.push_back("-fno-show-column");
3106 
3107  if (!Args.hasFlag(options::OPT_fspell_checking,
3108  options::OPT_fno_spell_checking))
3109  CmdArgs.push_back("-fno-spell-checking");
3110 }
3111 
3112 enum class DwarfFissionKind { None, Split, Single };
3113 
3115  const ArgList &Args, Arg *&Arg) {
3116  Arg =
3117  Args.getLastArg(options::OPT_gsplit_dwarf, options::OPT_gsplit_dwarf_EQ);
3118  if (!Arg)
3119  return DwarfFissionKind::None;
3120 
3121  if (Arg->getOption().matches(options::OPT_gsplit_dwarf))
3122  return DwarfFissionKind::Split;
3123 
3124  StringRef Value = Arg->getValue();
3125  if (Value == "split")
3126  return DwarfFissionKind::Split;
3127  if (Value == "single")
3128  return DwarfFissionKind::Single;
3129 
3130  D.Diag(diag::err_drv_unsupported_option_argument)
3131  << Arg->getOption().getName() << Arg->getValue();
3132  return DwarfFissionKind::None;
3133 }
3134 
3135 static void RenderDebugOptions(const ToolChain &TC, const Driver &D,
3136  const llvm::Triple &T, const ArgList &Args,
3137  bool EmitCodeView, bool IsWindowsMSVC,
3138  ArgStringList &CmdArgs,
3140  DwarfFissionKind &DwarfFission) {
3141  if (Args.hasFlag(options::OPT_fdebug_info_for_profiling,
3142  options::OPT_fno_debug_info_for_profiling, false) &&
3144  Args.getLastArg(options::OPT_fdebug_info_for_profiling), Args, D, TC))
3145  CmdArgs.push_back("-fdebug-info-for-profiling");
3146 
3147  // The 'g' groups options involve a somewhat intricate sequence of decisions
3148  // about what to pass from the driver to the frontend, but by the time they
3149  // reach cc1 they've been factored into three well-defined orthogonal choices:
3150  // * what level of debug info to generate
3151  // * what dwarf version to write
3152  // * what debugger tuning to use
3153  // This avoids having to monkey around further in cc1 other than to disable
3154  // codeview if not running in a Windows environment. Perhaps even that
3155  // decision should be made in the driver as well though.
3156  unsigned DWARFVersion = 0;
3157  llvm::DebuggerKind DebuggerTuning = TC.getDefaultDebuggerTuning();
3158 
3159  bool SplitDWARFInlining =
3160  Args.hasFlag(options::OPT_fsplit_dwarf_inlining,
3161  options::OPT_fno_split_dwarf_inlining, true);
3162 
3163  Args.ClaimAllArgs(options::OPT_g_Group);
3164 
3165  Arg* SplitDWARFArg;
3166  DwarfFission = getDebugFissionKind(D, Args, SplitDWARFArg);
3167 
3168  if (DwarfFission != DwarfFissionKind::None &&
3169  !checkDebugInfoOption(SplitDWARFArg, Args, D, TC)) {
3170  DwarfFission = DwarfFissionKind::None;
3171  SplitDWARFInlining = false;
3172  }
3173 
3174  if (const Arg *A =
3175  Args.getLastArg(options::OPT_g_Group, options::OPT_gsplit_dwarf,
3176  options::OPT_gsplit_dwarf_EQ)) {
3177  DebugInfoKind = codegenoptions::LimitedDebugInfo;
3178 
3179  // If the last option explicitly specified a debug-info level, use it.
3180  if (checkDebugInfoOption(A, Args, D, TC) &&
3181  A->getOption().matches(options::OPT_gN_Group)) {
3182  DebugInfoKind = DebugLevelToInfoKind(*A);
3183  // For -g0 or -gline-tables-only, drop -gsplit-dwarf. This gets a bit more
3184  // complicated if you've disabled inline info in the skeleton CUs
3185  // (SplitDWARFInlining) - then there's value in composing split-dwarf and
3186  // line-tables-only, so let those compose naturally in that case.
3187  if (DebugInfoKind == codegenoptions::NoDebugInfo ||
3188  DebugInfoKind == codegenoptions::DebugDirectivesOnly ||
3189  (DebugInfoKind == codegenoptions::DebugLineTablesOnly &&
3190  SplitDWARFInlining))
3191  DwarfFission = DwarfFissionKind::None;
3192  }
3193  }
3194 
3195  // If a debugger tuning argument appeared, remember it.
3196  if (const Arg *A =
3197  Args.getLastArg(options::OPT_gTune_Group, options::OPT_ggdbN_Group)) {
3198  if (checkDebugInfoOption(A, Args, D, TC)) {
3199  if (A->getOption().matches(options::OPT_glldb))
3200  DebuggerTuning = llvm::DebuggerKind::LLDB;
3201  else if (A->getOption().matches(options::OPT_gsce))
3202  DebuggerTuning = llvm::DebuggerKind::SCE;
3203  else
3204  DebuggerTuning = llvm::DebuggerKind::GDB;
3205  }
3206  }
3207 
3208  // If a -gdwarf argument appeared, remember it.
3209  if (const Arg *A =
3210  Args.getLastArg(options::OPT_gdwarf_2, options::OPT_gdwarf_3,
3211  options::OPT_gdwarf_4, options::OPT_gdwarf_5))
3212  if (checkDebugInfoOption(A, Args, D, TC))
3213  DWARFVersion = DwarfVersionNum(A->getSpelling());
3214 
3215  if (const Arg *A = Args.getLastArg(options::OPT_gcodeview)) {
3216  if (checkDebugInfoOption(A, Args, D, TC))
3217  EmitCodeView = true;
3218  }
3219 
3220  // If the user asked for debug info but did not explicitly specify -gcodeview
3221  // or -gdwarf, ask the toolchain for the default format.
3222  if (!EmitCodeView && DWARFVersion == 0 &&
3223  DebugInfoKind != codegenoptions::NoDebugInfo) {
3224  switch (TC.getDefaultDebugFormat()) {
3226  EmitCodeView = true;
3227  break;
3229  DWARFVersion = TC.GetDefaultDwarfVersion();
3230  break;
3231  }
3232  }
3233 
3234  // -gline-directives-only supported only for the DWARF debug info.
3235  if (DWARFVersion == 0 && DebugInfoKind == codegenoptions::DebugDirectivesOnly)
3236  DebugInfoKind = codegenoptions::NoDebugInfo;
3237 
3238  // We ignore flag -gstrict-dwarf for now.
3239  // And we handle flag -grecord-gcc-switches later with DWARFDebugFlags.
3240  Args.ClaimAllArgs(options::OPT_g_flags_Group);
3241 
3242  // Column info is included by default for everything except SCE and
3243  // CodeView. Clang doesn't track end columns, just starting columns, which,
3244  // in theory, is fine for CodeView (and PDB). In practice, however, the
3245  // Microsoft debuggers don't handle missing end columns well, so it's better
3246  // not to include any column info.
3247  if (const Arg *A = Args.getLastArg(options::OPT_gcolumn_info))
3248  (void)checkDebugInfoOption(A, Args, D, TC);
3249  if (Args.hasFlag(options::OPT_gcolumn_info, options::OPT_gno_column_info,
3250  /*Default=*/!EmitCodeView &&
3251  DebuggerTuning != llvm::DebuggerKind::SCE))
3252  CmdArgs.push_back("-dwarf-column-info");
3253 
3254  // FIXME: Move backend command line options to the module.
3255  // If -gline-tables-only or -gline-directives-only is the last option it wins.
3256  if (const Arg *A = Args.getLastArg(options::OPT_gmodules))
3257  if (checkDebugInfoOption(A, Args, D, TC)) {
3258  if (DebugInfoKind != codegenoptions::DebugLineTablesOnly &&
3259  DebugInfoKind != codegenoptions::DebugDirectivesOnly) {
3260  DebugInfoKind = codegenoptions::LimitedDebugInfo;
3261  CmdArgs.push_back("-dwarf-ext-refs");
3262  CmdArgs.push_back("-fmodule-format=obj");
3263  }
3264  }
3265 
3266  // -gsplit-dwarf enables the backend dwarf splitting and extraction.
3267  if (T.isOSBinFormatELF()) {
3268  if (!SplitDWARFInlining)
3269  CmdArgs.push_back("-fno-split-dwarf-inlining");
3270 
3271  if (DwarfFission != DwarfFissionKind::None) {
3272  if (DwarfFission == DwarfFissionKind::Single)
3273  CmdArgs.push_back("-enable-split-dwarf=single");
3274  else
3275  CmdArgs.push_back("-enable-split-dwarf");
3276  }
3277  }
3278 
3279  // After we've dealt with all combinations of things that could
3280  // make DebugInfoKind be other than None or DebugLineTablesOnly,
3281  // figure out if we need to "upgrade" it to standalone debug info.
3282  // We parse these two '-f' options whether or not they will be used,
3283  // to claim them even if you wrote "-fstandalone-debug -gline-tables-only"
3284  bool NeedFullDebug = Args.hasFlag(
3285  options::OPT_fstandalone_debug, options::OPT_fno_standalone_debug,
3286  DebuggerTuning == llvm::DebuggerKind::LLDB ||
3288  if (const Arg *A = Args.getLastArg(options::OPT_fstandalone_debug))
3289  (void)checkDebugInfoOption(A, Args, D, TC);
3290  if (DebugInfoKind == codegenoptions::LimitedDebugInfo && NeedFullDebug)
3291  DebugInfoKind = codegenoptions::FullDebugInfo;
3292 
3293  if (Args.hasFlag(options::OPT_gembed_source, options::OPT_gno_embed_source,
3294  false)) {
3295  // Source embedding is a vendor extension to DWARF v5. By now we have
3296  // checked if a DWARF version was stated explicitly, and have otherwise
3297  // fallen back to the target default, so if this is still not at least 5
3298  // we emit an error.
3299  const Arg *A = Args.getLastArg(options::OPT_gembed_source);
3300  if (DWARFVersion < 5)
3301  D.Diag(diag::err_drv_argument_only_allowed_with)
3302  << A->getAsString(Args) << "-gdwarf-5";
3303  else if (checkDebugInfoOption(A, Args, D, TC))
3304  CmdArgs.push_back("-gembed-source");
3305  }
3306 
3307  if (EmitCodeView) {
3308  CmdArgs.push_back("-gcodeview");
3309 
3310  // Emit codeview type hashes if requested.
3311  if (Args.hasFlag(options::OPT_gcodeview_ghash,
3312  options::OPT_gno_codeview_ghash, false)) {
3313  CmdArgs.push_back("-gcodeview-ghash");
3314  }
3315  }
3316 
3317  // Adjust the debug info kind for the given toolchain.
3318  TC.adjustDebugInfoKind(DebugInfoKind, Args);
3319 
3320  RenderDebugEnablingArgs(Args, CmdArgs, DebugInfoKind, DWARFVersion,
3321  DebuggerTuning);
3322 
3323  // -fdebug-macro turns on macro debug info generation.
3324  if (Args.hasFlag(options::OPT_fdebug_macro, options::OPT_fno_debug_macro,
3325  false))
3326  if (checkDebugInfoOption(Args.getLastArg(options::OPT_fdebug_macro), Args,
3327  D, TC))
3328  CmdArgs.push_back("-debug-info-macro");
3329 
3330  // -ggnu-pubnames turns on gnu style pubnames in the backend.
3331  const auto *PubnamesArg =
3332  Args.getLastArg(options::OPT_ggnu_pubnames, options::OPT_gno_gnu_pubnames,
3333  options::OPT_gpubnames, options::OPT_gno_pubnames);
3334  if (DwarfFission != DwarfFissionKind::None ||
3335  DebuggerTuning == llvm::DebuggerKind::LLDB ||
3336  (PubnamesArg && checkDebugInfoOption(PubnamesArg, Args, D, TC)))
3337  if (!PubnamesArg ||
3338  (!PubnamesArg->getOption().matches(options::OPT_gno_gnu_pubnames) &&
3339  !PubnamesArg->getOption().matches(options::OPT_gno_pubnames)))
3340  CmdArgs.push_back(PubnamesArg && PubnamesArg->getOption().matches(
3341  options::OPT_gpubnames)
3342  ? "-gpubnames"
3343  : "-ggnu-pubnames");
3344 
3345  if (Args.hasFlag(options::OPT_fdebug_ranges_base_address,
3346  options::OPT_fno_debug_ranges_base_address, false)) {
3347  CmdArgs.push_back("-fdebug-ranges-base-address");
3348  }
3349 
3350  // -gdwarf-aranges turns on the emission of the aranges section in the
3351  // backend.
3352  // Always enabled for SCE tuning.
3353  bool NeedAranges = DebuggerTuning == llvm::DebuggerKind::SCE;
3354  if (const Arg *A = Args.getLastArg(options::OPT_gdwarf_aranges))
3355  NeedAranges = checkDebugInfoOption(A, Args, D, TC) || NeedAranges;
3356  if (NeedAranges) {
3357  CmdArgs.push_back("-mllvm");
3358  CmdArgs.push_back("-generate-arange-section");
3359  }
3360 
3361  if (Args.hasFlag(options::OPT_fdebug_types_section,
3362  options::OPT_fno_debug_types_section, false)) {
3363  if (!T.isOSBinFormatELF()) {
3364  D.Diag(diag::err_drv_unsupported_opt_for_target)
3365  << Args.getLastArg(options::OPT_fdebug_types_section)
3366  ->getAsString(Args)
3367  << T.getTriple();
3368  } else if (checkDebugInfoOption(
3369  Args.getLastArg(options::OPT_fdebug_types_section), Args, D,
3370  TC)) {
3371  CmdArgs.push_back("-mllvm");
3372  CmdArgs.push_back("-generate-type-units");
3373  }
3374  }
3375 
3376  // Decide how to render forward declarations of template instantiations.
3377  // SCE wants full descriptions, others just get them in the name.
3378  if (DebuggerTuning == llvm::DebuggerKind::SCE)
3379  CmdArgs.push_back("-debug-forward-template-params");
3380 
3381  // Do we need to explicitly import anonymous namespaces into the parent
3382  // scope?
3383  if (DebuggerTuning == llvm::DebuggerKind::SCE)
3384  CmdArgs.push_back("-dwarf-explicit-import");
3385 
3386  RenderDebugInfoCompressionArgs(Args, CmdArgs, D, TC);
3387 }
3388 
3390  const InputInfo &Output, const InputInfoList &Inputs,
3391  const ArgList &Args, const char *LinkingOutput) const {
3392  const auto &TC = getToolChain();
3393  const llvm::Triple &RawTriple = TC.getTriple();
3394  const llvm::Triple &Triple = TC.getEffectiveTriple();
3395  const std::string &TripleStr = Triple.getTriple();
3396 
3397  bool KernelOrKext =
3398  Args.hasArg(options::OPT_mkernel, options::OPT_fapple_kext);
3399  const Driver &D = TC.getDriver();
3400  ArgStringList CmdArgs;
3401 
3402  // Check number of inputs for sanity. We need at least one input.
3403  assert(Inputs.size() >= 1 && "Must have at least one input.");
3404  // CUDA/HIP compilation may have multiple inputs (source file + results of
3405  // device-side compilations). OpenMP device jobs also take the host IR as a
3406  // second input. Module precompilation accepts a list of header files to
3407  // include as part of the module. All other jobs are expected to have exactly
3408  // one input.
3409  bool IsCuda = JA.isOffloading(Action::OFK_Cuda);
3410  bool IsHIP = JA.isOffloading(Action::OFK_HIP);
3411  bool IsOpenMPDevice = JA.isDeviceOffloading(Action::OFK_OpenMP);
3412  bool IsHeaderModulePrecompile = isa<HeaderModulePrecompileJobAction>(JA);
3413 
3414  // A header module compilation doesn't have a main input file, so invent a
3415  // fake one as a placeholder.
3416  const char *ModuleName = [&]{
3417  auto *ModuleNameArg = Args.getLastArg(options::OPT_fmodule_name_EQ);
3418  return ModuleNameArg ? ModuleNameArg->getValue() : "";
3419  }();
3420  InputInfo HeaderModuleInput(Inputs[0].getType(), ModuleName, ModuleName);
3421 
3422  const InputInfo &Input =
3423  IsHeaderModulePrecompile ? HeaderModuleInput : Inputs[0];
3424 
3425  InputInfoList ModuleHeaderInputs;
3426  const InputInfo *CudaDeviceInput = nullptr;
3427  const InputInfo *OpenMPDeviceInput = nullptr;
3428  for (const InputInfo &I : Inputs) {
3429  if (&I == &Input) {
3430  // This is the primary input.
3431  } else if (IsHeaderModulePrecompile &&
3432  types::getPrecompiledType(I.getType()) == types::TY_PCH) {
3433  types::ID Expected = HeaderModuleInput.getType();
3434  if (I.getType() != Expected) {
3435  D.Diag(diag::err_drv_module_header_wrong_kind)
3436  << I.getFilename() << types::getTypeName(I.getType())
3437  << types::getTypeName(Expected);
3438  }
3439  ModuleHeaderInputs.push_back(I);
3440  } else if ((IsCuda || IsHIP) && !CudaDeviceInput) {
3441  CudaDeviceInput = &I;
3442  } else if (IsOpenMPDevice && !OpenMPDeviceInput) {
3443  OpenMPDeviceInput = &I;
3444  } else {
3445  llvm_unreachable("unexpectedly given multiple inputs");
3446  }
3447  }
3448 
3449  const llvm::Triple *AuxTriple = IsCuda ? TC.getAuxTriple() : nullptr;
3450  bool IsWindowsGNU = RawTriple.isWindowsGNUEnvironment();
3451  bool IsWindowsCygnus = RawTriple.isWindowsCygwinEnvironment();
3452  bool IsWindowsMSVC = RawTriple.isWindowsMSVCEnvironment();
3453  bool IsIAMCU = RawTriple.isOSIAMCU();
3454 
3455  // Adjust IsWindowsXYZ for CUDA/HIP compilations. Even when compiling in
3456  // device mode (i.e., getToolchain().getTriple() is NVPTX/AMDGCN, not
3457  // Windows), we need to pass Windows-specific flags to cc1.
3458  if (IsCuda || IsHIP) {
3459  IsWindowsMSVC |= AuxTriple && AuxTriple->isWindowsMSVCEnvironment();
3460  IsWindowsGNU |= AuxTriple && AuxTriple->isWindowsGNUEnvironment();
3461  IsWindowsCygnus |= AuxTriple && AuxTriple->isWindowsCygwinEnvironment();
3462  }
3463 
3464  // C++ is not supported for IAMCU.
3465  if (IsIAMCU && types::isCXX(Input.getType()))
3466  D.Diag(diag::err_drv_clang_unsupported) << "C++ for IAMCU";
3467 
3468  // Invoke ourselves in -cc1 mode.
3469  //
3470  // FIXME: Implement custom jobs for internal actions.
3471  CmdArgs.push_back("-cc1");
3472 
3473  // Add the "effective" target triple.
3474  CmdArgs.push_back("-triple");
3475  CmdArgs.push_back(Args.MakeArgString(TripleStr));
3476 
3477  if (const Arg *MJ = Args.getLastArg(options::OPT_MJ)) {
3478  DumpCompilationDatabase(C, MJ->getValue(), TripleStr, Output, Input, Args);
3479  Args.ClaimAllArgs(options::OPT_MJ);
3480  }
3481 
3482  if (IsCuda || IsHIP) {
3483  // We have to pass the triple of the host if compiling for a CUDA/HIP device
3484  // and vice-versa.
3485  std::string NormalizedTriple;
3488  NormalizedTriple = C.getSingleOffloadToolChain<Action::OFK_Host>()
3489  ->getTriple()
3490  .normalize();
3491  else {
3492  // Host-side compilation.
3493  NormalizedTriple =
3496  ->getTriple()
3497  .normalize();
3498  if (IsCuda) {
3499  // We need to figure out which CUDA version we're compiling for, as that
3500  // determines how we load and launch GPU kernels.
3501  auto *CTC = static_cast<const toolchains::CudaToolChain *>(
3503  assert(CTC && "Expected valid CUDA Toolchain.");
3504  if (CTC && CTC->CudaInstallation.version() != CudaVersion::UNKNOWN)
3505  CmdArgs.push_back(Args.MakeArgString(
3506  Twine("-target-sdk-version=") +
3507  CudaVersionToString(CTC->CudaInstallation.version())));
3508  }
3509  }
3510  CmdArgs.push_back("-aux-triple");
3511  CmdArgs.push_back(Args.MakeArgString(NormalizedTriple));
3512  }
3513 
3514  if (IsOpenMPDevice) {
3515  // We have to pass the triple of the host if compiling for an OpenMP device.
3516  std::string NormalizedTriple =
3518  ->getTriple()
3519  .normalize();
3520  CmdArgs.push_back("-aux-triple");
3521  CmdArgs.push_back(Args.MakeArgString(NormalizedTriple));
3522  }
3523 
3524  if (Triple.isOSWindows() && (Triple.getArch() == llvm::Triple::arm ||
3525  Triple.getArch() == llvm::Triple::thumb)) {
3526  unsigned Offset = Triple.getArch() == llvm::Triple::arm ? 4 : 6;
3527  unsigned Version;
3528  Triple.getArchName().substr(Offset).getAsInteger(10, Version);
3529  if (Version < 7)
3530  D.Diag(diag::err_target_unsupported_arch) << Triple.getArchName()
3531  << TripleStr;
3532  }
3533 
3534  // Push all default warning arguments that are specific to
3535  // the given target. These come before user provided warning options
3536  // are provided.
3537  TC.addClangWarningOptions(CmdArgs);
3538 
3539  // Select the appropriate action.
3540  RewriteKind rewriteKind = RK_None;
3541 
3542  if (isa<AnalyzeJobAction>(JA)) {
3543  assert(JA.getType() == types::TY_Plist && "Invalid output type.");
3544  CmdArgs.push_back("-analyze");
3545  } else if (isa<MigrateJobAction>(JA)) {
3546  CmdArgs.push_back("-migrate");
3547  } else if (isa<PreprocessJobAction>(JA)) {
3548  if (Output.getType() == types::TY_Dependencies)
3549  CmdArgs.push_back("-Eonly");
3550  else {
3551  CmdArgs.push_back("-E");
3552  if (Args.hasArg(options::OPT_rewrite_objc) &&
3553  !Args.hasArg(options::OPT_g_Group))
3554  CmdArgs.push_back("-P");
3555  }
3556  } else if (isa<AssembleJobAction>(JA)) {
3557  CmdArgs.push_back("-emit-obj");
3558 
3559  CollectArgsForIntegratedAssembler(C, Args, CmdArgs, D);
3560 
3561  // Also ignore explicit -force_cpusubtype_ALL option.
3562  (void)Args.hasArg(options::OPT_force__cpusubtype__ALL);
3563  } else if (isa<PrecompileJobAction>(JA)) {
3564  if (JA.getType() == types::TY_Nothing)
3565  CmdArgs.push_back("-fsyntax-only");
3566  else if (JA.getType() == types::TY_ModuleFile)
3567  CmdArgs.push_back(IsHeaderModulePrecompile
3568  ? "-emit-header-module"
3569  : "-emit-module-interface");
3570  else
3571  CmdArgs.push_back("-emit-pch");
3572  } else if (isa<VerifyPCHJobAction>(JA)) {
3573  CmdArgs.push_back("-verify-pch");
3574  } else {
3575  assert((isa<CompileJobAction>(JA) || isa<BackendJobAction>(JA)) &&
3576  "Invalid action for clang tool.");
3577  if (JA.getType() == types::TY_Nothing) {
3578  CmdArgs.push_back("-fsyntax-only");
3579  } else if (JA.getType() == types::TY_LLVM_IR ||
3580  JA.getType() == types::TY_LTO_IR) {
3581  CmdArgs.push_back("-emit-llvm");
3582  } else if (JA.getType() == types::TY_LLVM_BC ||
3583  JA.getType() == types::TY_LTO_BC) {
3584  CmdArgs.push_back("-emit-llvm-bc");
3585  } else if (JA.getType() == types::TY_PP_Asm) {
3586  CmdArgs.push_back("-S");
3587  } else if (JA.getType() == types::TY_AST) {
3588  CmdArgs.push_back("-emit-pch");
3589  } else if (JA.getType() == types::TY_ModuleFile) {
3590  CmdArgs.push_back("-module-file-info");
3591  } else if (JA.getType() == types::TY_RewrittenObjC) {
3592  CmdArgs.push_back("-rewrite-objc");
3593  rewriteKind = RK_NonFragile;
3594  } else if (JA.getType() == types::TY_RewrittenLegacyObjC) {
3595  CmdArgs.push_back("-rewrite-objc");
3596  rewriteKind = RK_Fragile;
3597  } else {
3598  assert(JA.getType() == types::TY_PP_Asm && "Unexpected output type!");
3599  }
3600 
3601  // Preserve use-list order by default when emitting bitcode, so that
3602  // loading the bitcode up in 'opt' or 'llc' and running passes gives the
3603  // same result as running passes here. For LTO, we don't need to preserve
3604  // the use-list order, since serialization to bitcode is part of the flow.
3605  if (JA.getType() == types::TY_LLVM_BC)
3606  CmdArgs.push_back("-emit-llvm-uselists");
3607 
3608  // Device-side jobs do not support LTO.
3609  bool isDeviceOffloadAction = !(JA.isDeviceOffloading(Action::OFK_None) ||
3611 
3612  if (D.isUsingLTO() && !isDeviceOffloadAction) {
3613  Args.AddLastArg(CmdArgs, options::OPT_flto, options::OPT_flto_EQ);
3614 
3615  // The Darwin and PS4 linkers currently use the legacy LTO API, which
3616  // does not support LTO unit features (CFI, whole program vtable opt)
3617  // under ThinLTO.
3618  if (!(RawTriple.isOSDarwin() || RawTriple.isPS4()) ||
3619  D.getLTOMode() == LTOK_Full)
3620  CmdArgs.push_back("-flto-unit");
3621  }
3622  }
3623 
3624  if (const Arg *A = Args.getLastArg(options::OPT_fthinlto_index_EQ)) {
3625  if (!types::isLLVMIR(Input.getType()))
3626  D.Diag(diag::err_drv_argument_only_allowed_with) << A->getAsString(Args)
3627  << "-x ir";
3628  Args.AddLastArg(CmdArgs, options::OPT_fthinlto_index_EQ);
3629  }
3630 
3631  if (Args.getLastArg(options::OPT_save_temps_EQ))
3632  Args.AddLastArg(CmdArgs, options::OPT_save_temps_EQ);
3633 
3634  // Embed-bitcode option.
3635  // Only white-listed flags below are allowed to be embedded.
3636  if (C.getDriver().embedBitcodeInObject() && !C.getDriver().isUsingLTO() &&
3637  (isa<BackendJobAction>(JA) || isa<AssembleJobAction>(JA))) {
3638  // Add flags implied by -fembed-bitcode.
3639  Args.AddLastArg(CmdArgs, options::OPT_fembed_bitcode_EQ);
3640  // Disable all llvm IR level optimizations.
3641  CmdArgs.push_back("-disable-llvm-passes");
3642 
3643  // reject options that shouldn't be supported in bitcode
3644  // also reject kernel/kext
3645  static const constexpr unsigned kBitcodeOptionBlacklist[] = {
3646  options::OPT_mkernel,
3647  options::OPT_fapple_kext,
3648  options::OPT_ffunction_sections,
3649  options::OPT_fno_function_sections,
3650  options::OPT_fdata_sections,
3651  options::OPT_fno_data_sections,
3652  options::OPT_funique_section_names,
3653  options::OPT_fno_unique_section_names,
3654  options::OPT_mrestrict_it,
3655  options::OPT_mno_restrict_it,
3656  options::OPT_mstackrealign,
3657  options::OPT_mno_stackrealign,
3658  options::OPT_mstack_alignment,
3659  options::OPT_mcmodel_EQ,
3660  options::OPT_mlong_calls,
3661  options::OPT_mno_long_calls,
3662  options::OPT_ggnu_pubnames,
3663  options::OPT_gdwarf_aranges,
3664  options::OPT_fdebug_types_section,
3665  options::OPT_fno_debug_types_section,
3666  options::OPT_fdwarf_directory_asm,
3667  options::OPT_fno_dwarf_directory_asm,
3668  options::OPT_mrelax_all,
3669  options::OPT_mno_relax_all,
3670  options::OPT_ftrap_function_EQ,
3671  options::OPT_ffixed_r9,
3672  options::OPT_mfix_cortex_a53_835769,
3673  options::OPT_mno_fix_cortex_a53_835769,
3674  options::OPT_ffixed_x18,
3675  options::OPT_mglobal_merge,
3676  options::OPT_mno_global_merge,
3677  options::OPT_mred_zone,
3678  options::OPT_mno_red_zone,
3679  options::OPT_Wa_COMMA,
3680  options::OPT_Xassembler,
3681  options::OPT_mllvm,
3682  };
3683  for (const auto &A : Args)
3684  if (llvm::find(kBitcodeOptionBlacklist, A->getOption().getID()) !=
3685  std::end(kBitcodeOptionBlacklist))
3686  D.Diag(diag::err_drv_unsupported_embed_bitcode) << A->getSpelling();
3687 
3688  // Render the CodeGen options that need to be passed.
3689  if (!Args.hasFlag(options::OPT_foptimize_sibling_calls,
3690  options::OPT_fno_optimize_sibling_calls))
3691  CmdArgs.push_back("-mdisable-tail-calls");
3692 
3694  CmdArgs);
3695 
3696  // Render ABI arguments
3697  switch (TC.getArch()) {
3698  default: break;
3699  case llvm::Triple::arm:
3700  case llvm::Triple::armeb:
3701  case llvm::Triple::thumbeb:
3702  RenderARMABI(Triple, Args, CmdArgs);
3703  break;
3704  case llvm::Triple::aarch64:
3705  case llvm::Triple::aarch64_be:
3706  RenderAArch64ABI(Triple, Args, CmdArgs);
3707  break;
3708  }
3709 
3710  // Optimization level for CodeGen.
3711  if (const Arg *A = Args.getLastArg(options::OPT_O_Group)) {
3712  if (A->getOption().matches(options::OPT_O4)) {
3713  CmdArgs.push_back("-O3");
3714  D.Diag(diag::warn_O4_is_O3);
3715  } else {
3716  A->render(Args, CmdArgs);
3717  }
3718  }
3719 
3720  // Input/Output file.
3721  if (Output.getType() == types::TY_Dependencies) {
3722  // Handled with other dependency code.
3723  } else if (Output.isFilename()) {
3724  CmdArgs.push_back("-o");
3725  CmdArgs.push_back(Output.getFilename());
3726  } else {
3727  assert(Output.isNothing() && "Input output.");
3728  }
3729 
3730  for (const auto &II : Inputs) {
3731  addDashXForInput(Args, II, CmdArgs);
3732  if (II.isFilename())
3733  CmdArgs.push_back(II.getFilename());
3734  else
3735  II.getInputArg().renderAsInput(Args, CmdArgs);
3736  }
3737 
3738  C.addCommand(llvm::make_unique<Command>(JA, *this, D.getClangProgramPath(),
3739  CmdArgs, Inputs));
3740  return;
3741  }
3742 
3744  CmdArgs.push_back("-fembed-bitcode=marker");
3745 
3746  // We normally speed up the clang process a bit by skipping destructors at
3747  // exit, but when we're generating diagnostics we can rely on some of the
3748  // cleanup.
3749  if (!C.isForDiagnostics())
3750  CmdArgs.push_back("-disable-free");
3751 
3752 #ifdef NDEBUG
3753  const bool IsAssertBuild = false;
3754 #else
3755  const bool IsAssertBuild = true;
3756 #endif
3757 
3758  // Disable the verification pass in -asserts builds.
3759  if (!IsAssertBuild)
3760  CmdArgs.push_back("-disable-llvm-verifier");
3761 
3762  // Discard value names in assert builds unless otherwise specified.
3763  if (Args.hasFlag(options::OPT_fdiscard_value_names,
3764  options::OPT_fno_discard_value_names, !IsAssertBuild))
3765  CmdArgs.push_back("-discard-value-names");
3766 
3767  // Set the main file name, so that debug info works even with
3768  // -save-temps.
3769  CmdArgs.push_back("-main-file-name");
3770  CmdArgs.push_back(getBaseInputName(Args, Input));
3771 
3772  // Some flags which affect the language (via preprocessor
3773  // defines).
3774  if (Args.hasArg(options::OPT_static))
3775  CmdArgs.push_back("-static-define");
3776 
3777  if (Args.hasArg(options::OPT_municode))
3778  CmdArgs.push_back("-DUNICODE");
3779 
3780  if (isa<AnalyzeJobAction>(JA))
3781  RenderAnalyzerOptions(Args, CmdArgs, Triple, Input);
3782 
3783  // Enable compatilibily mode to avoid analyzer-config related errors.
3784  // Since we can't access frontend flags through hasArg, let's manually iterate
3785  // through them.
3786  bool FoundAnalyzerConfig = false;
3787  for (auto Arg : Args.filtered(options::OPT_Xclang))
3788  if (StringRef(Arg->getValue()) == "-analyzer-config") {
3789  FoundAnalyzerConfig = true;
3790  break;
3791  }
3792  if (!FoundAnalyzerConfig)
3793  for (auto Arg : Args.filtered(options::OPT_Xanalyzer))
3794  if (StringRef(Arg->getValue()) == "-analyzer-config") {
3795  FoundAnalyzerConfig = true;
3796  break;
3797  }
3798  if (FoundAnalyzerConfig)
3799  CmdArgs.push_back("-analyzer-config-compatibility-mode=true");
3800 
3801  CheckCodeGenerationOptions(D, Args);
3802 
3803  unsigned FunctionAlignment = ParseFunctionAlignment(TC, Args);
3804  assert(FunctionAlignment <= 31 && "function alignment will be truncated!");
3805  if (FunctionAlignment) {
3806  CmdArgs.push_back("-function-alignment");
3807  CmdArgs.push_back(Args.MakeArgString(std::to_string(FunctionAlignment)));
3808  }
3809 
3810  llvm::Reloc::Model RelocationModel;
3811  unsigned PICLevel;
3812  bool IsPIE;
3813  std::tie(RelocationModel, PICLevel, IsPIE) = ParsePICArgs(TC, Args);
3814 
3815  const char *RMName = RelocationModelName(RelocationModel);
3816 
3817  if ((RelocationModel == llvm::Reloc::ROPI ||
3818  RelocationModel == llvm::Reloc::ROPI_RWPI) &&
3819  types::isCXX(Input.getType()) &&
3820  !Args.hasArg(options::OPT_fallow_unsupported))
3821  D.Diag(diag::err_drv_ropi_incompatible_with_cxx);
3822 
3823  if (RMName) {
3824  CmdArgs.push_back("-mrelocation-model");
3825  CmdArgs.push_back(RMName);
3826  }
3827  if (PICLevel > 0) {
3828  CmdArgs.push_back("-pic-level");
3829  CmdArgs.push_back(PICLevel == 1 ? "1" : "2");
3830  if (IsPIE)
3831  CmdArgs.push_back("-pic-is-pie");
3832  }
3833 
3834  if (RelocationModel == llvm::Reloc::ROPI ||
3835  RelocationModel == llvm::Reloc::ROPI_RWPI)
3836  CmdArgs.push_back("-fropi");
3837  if (RelocationModel == llvm::Reloc::RWPI ||
3838  RelocationModel == llvm::Reloc::ROPI_RWPI)
3839  CmdArgs.push_back("-frwpi");
3840 
3841  if (Arg *A = Args.getLastArg(options::OPT_meabi)) {
3842  CmdArgs.push_back("-meabi");
3843  CmdArgs.push_back(A->getValue());
3844  }
3845 
3846  CmdArgs.push_back("-mthread-model");
3847  if (Arg *A = Args.getLastArg(options::OPT_mthread_model)) {
3848  if (!TC.isThreadModelSupported(A->getValue()))
3849  D.Diag(diag::err_drv_invalid_thread_model_for_target)
3850  << A->getValue() << A->getAsString(Args);
3851  CmdArgs.push_back(A->getValue());
3852  }
3853  else
3854  CmdArgs.push_back(Args.MakeArgString(TC.getThreadModel()));
3855 
3856  Args.AddLastArg(CmdArgs, options::OPT_fveclib);
3857 
3858  if (Args.hasFlag(options::OPT_fmerge_all_constants,
3859  options::OPT_fno_merge_all_constants, false))
3860  CmdArgs.push_back("-fmerge-all-constants");
3861 
3862  if (Args.hasFlag(options::OPT_fno_delete_null_pointer_checks,
3863  options::OPT_fdelete_null_pointer_checks, false))
3864  CmdArgs.push_back("-fno-delete-null-pointer-checks");
3865 
3866  // LLVM Code Generator Options.
3867 
3868  if (Args.hasArg(options::OPT_frewrite_map_file) ||
3869  Args.hasArg(options::OPT_frewrite_map_file_EQ)) {
3870  for (const Arg *A : Args.filtered(options::OPT_frewrite_map_file,
3871  options::OPT_frewrite_map_file_EQ)) {
3872  StringRef Map = A->getValue();
3873  if (!llvm::sys::fs::exists(Map)) {
3874  D.Diag(diag::err_drv_no_such_file) << Map;
3875  } else {
3876  CmdArgs.push_back("-frewrite-map-file");
3877  CmdArgs.push_back(A->getValue());
3878  A->claim();
3879  }
3880  }
3881  }
3882 
3883  if (Arg *A = Args.getLastArg(options::OPT_Wframe_larger_than_EQ)) {
3884  StringRef v = A->getValue();
3885  CmdArgs.push_back("-mllvm");
3886  CmdArgs.push_back(Args.MakeArgString("-warn-stack-size=" + v));
3887  A->claim();
3888  }
3889 
3890  if (!Args.hasFlag(options::OPT_fjump_tables, options::OPT_fno_jump_tables,
3891  true))
3892  CmdArgs.push_back("-fno-jump-tables");
3893 
3894  if (Args.hasFlag(options::OPT_fprofile_sample_accurate,
3895  options::OPT_fno_profile_sample_accurate, false))
3896  CmdArgs.push_back("-fprofile-sample-accurate");
3897 
3898  if (!Args.hasFlag(options::OPT_fpreserve_as_comments,
3899  options::OPT_fno_preserve_as_comments, true))
3900  CmdArgs.push_back("-fno-preserve-as-comments");
3901 
3902  if (Arg *A = Args.getLastArg(options::OPT_mregparm_EQ)) {
3903  CmdArgs.push_back("-mregparm");
3904  CmdArgs.push_back(A->getValue());
3905  }
3906 
3907  if (Arg *A = Args.getLastArg(options::OPT_fpcc_struct_return,
3908  options::OPT_freg_struct_return)) {
3909  if (TC.getArch() != llvm::Triple::x86) {
3910  D.Diag(diag::err_drv_unsupported_opt_for_target)
3911  << A->getSpelling() << RawTriple.str();
3912  } else if (A->getOption().matches(options::OPT_fpcc_struct_return)) {
3913  CmdArgs.push_back("-fpcc-struct-return");
3914  } else {
3915  assert(A->getOption().matches(options::OPT_freg_struct_return));
3916  CmdArgs.push_back("-freg-struct-return");
3917  }
3918  }
3919 
3920  if (Args.hasFlag(options::OPT_mrtd, options::OPT_mno_rtd, false))
3921  CmdArgs.push_back("-fdefault-calling-conv=stdcall");
3922 
3923  if (shouldUseFramePointer(Args, RawTriple))
3924  CmdArgs.push_back("-mdisable-fp-elim");
3925  if (!Args.hasFlag(options::OPT_fzero_initialized_in_bss,
3926  options::OPT_fno_zero_initialized_in_bss))
3927  CmdArgs.push_back("-mno-zero-initialized-in-bss");
3928 
3929  bool OFastEnabled = isOptimizationLevelFast(Args);
3930  // If -Ofast is the optimization level, then -fstrict-aliasing should be
3931  // enabled. This alias option is being used to simplify the hasFlag logic.
3932  OptSpecifier StrictAliasingAliasOption =
3933  OFastEnabled ? options::OPT_Ofast : options::OPT_fstrict_aliasing;
3934  // We turn strict aliasing off by default if we're in CL mode, since MSVC
3935  // doesn't do any TBAA.
3936  bool TBAAOnByDefault = !D.IsCLMode();
3937  if (!Args.hasFlag(options::OPT_fstrict_aliasing, StrictAliasingAliasOption,
3938  options::OPT_fno_strict_aliasing, TBAAOnByDefault))
3939  CmdArgs.push_back("-relaxed-aliasing");
3940  if (!Args.hasFlag(options::OPT_fstruct_path_tbaa,
3941  options::OPT_fno_struct_path_tbaa))
3942  CmdArgs.push_back("-no-struct-path-tbaa");
3943  if (Args.hasFlag(options::OPT_fstrict_enums, options::OPT_fno_strict_enums,
3944  false))
3945  CmdArgs.push_back("-fstrict-enums");
3946  if (!Args.hasFlag(options::OPT_fstrict_return, options::OPT_fno_strict_return,
3947  true))
3948  CmdArgs.push_back("-fno-strict-return");
3949  if (Args.hasFlag(options::OPT_fallow_editor_placeholders,
3950  options::OPT_fno_allow_editor_placeholders, false))
3951  CmdArgs.push_back("-fallow-editor-placeholders");
3952  if (Args.hasFlag(options::OPT_fstrict_vtable_pointers,
3953  options::OPT_fno_strict_vtable_pointers,
3954  false))
3955  CmdArgs.push_back("-fstrict-vtable-pointers");
3956  if (Args.hasFlag(options::OPT_fforce_emit_vtables,
3957  options::OPT_fno_force_emit_vtables,
3958  false))
3959  CmdArgs.push_back("-fforce-emit-vtables");
3960  if (!Args.hasFlag(options::OPT_foptimize_sibling_calls,
3961  options::OPT_fno_optimize_sibling_calls))
3962  CmdArgs.push_back("-mdisable-tail-calls");
3963  if (Args.hasFlag(options::OPT_fno_escaping_block_tail_calls,
3964  options::OPT_fescaping_block_tail_calls, false))
3965  CmdArgs.push_back("-fno-escaping-block-tail-calls");
3966 
3967  Args.AddLastArg(CmdArgs, options::OPT_ffine_grained_bitfield_accesses,
3968  options::OPT_fno_fine_grained_bitfield_accesses);
3969 
3970  // Handle segmented stacks.
3971  if (Args.hasArg(options::OPT_fsplit_stack))
3972  CmdArgs.push_back("-split-stacks");
3973 
3974  RenderFloatingPointOptions(TC, D, OFastEnabled, Args, CmdArgs);
3975 
3976  // Decide whether to use verbose asm. Verbose assembly is the default on
3977  // toolchains which have the integrated assembler on by default.
3978  bool IsIntegratedAssemblerDefault = TC.IsIntegratedAssemblerDefault();
3979  if (Args.hasFlag(options::OPT_fverbose_asm, options::OPT_fno_verbose_asm,
3980  IsIntegratedAssemblerDefault) ||
3981  Args.hasArg(options::OPT_dA))
3982  CmdArgs.push_back("-masm-verbose");
3983 
3984  if (!TC.useIntegratedAs())
3985  CmdArgs.push_back("-no-integrated-as");
3986 
3987  if (Args.hasArg(options::OPT_fdebug_pass_structure)) {
3988  CmdArgs.push_back("-mdebug-pass");
3989  CmdArgs.push_back("Structure");
3990  }
3991  if (Args.hasArg(options::OPT_fdebug_pass_arguments)) {
3992  CmdArgs.push_back("-mdebug-pass");
3993  CmdArgs.push_back("Arguments");
3994  }
3995 
3996  // Enable -mconstructor-aliases except on darwin, where we have to work around
3997  // a linker bug (see <rdar://problem/7651567>), and CUDA device code, where
3998  // aliases aren't supported.
3999  if (!RawTriple.isOSDarwin() && !RawTriple.isNVPTX())
4000  CmdArgs.push_back("-mconstructor-aliases");
4001 
4002  // Darwin's kernel doesn't support guard variables; just die if we
4003  // try to use them.
4004  if (KernelOrKext && RawTriple.isOSDarwin())
4005  CmdArgs.push_back("-fforbid-guard-variables");
4006 
4007  if (Args.hasFlag(options::OPT_mms_bitfields, options::OPT_mno_ms_bitfields,
4008  false)) {
4009  CmdArgs.push_back("-mms-bitfields");
4010  }
4011 
4012  if (Args.hasFlag(options::OPT_mpie_copy_relocations,
4013  options::OPT_mno_pie_copy_relocations,
4014  false)) {
4015  CmdArgs.push_back("-mpie-copy-relocations");
4016  }
4017 
4018  if (Args.hasFlag(options::OPT_fno_plt, options::OPT_fplt, false)) {
4019  CmdArgs.push_back("-fno-plt");
4020  }
4021 
4022  // -fhosted is default.
4023  // TODO: Audit uses of KernelOrKext and see where it'd be more appropriate to
4024  // use Freestanding.
4025  bool Freestanding =
4026  Args.hasFlag(options::OPT_ffreestanding, options::OPT_fhosted, false) ||
4027  KernelOrKext;
4028  if (Freestanding)
4029  CmdArgs.push_back("-ffreestanding");
4030 
4031  // This is a coarse approximation of what llvm-gcc actually does, both
4032  // -fasynchronous-unwind-tables and -fnon-call-exceptions interact in more
4033  // complicated ways.
4034  bool AsynchronousUnwindTables =
4035  Args.hasFlag(options::OPT_fasynchronous_unwind_tables,
4036  options::OPT_fno_asynchronous_unwind_tables,
4037  (TC.IsUnwindTablesDefault(Args) ||
4038  TC.getSanitizerArgs().needsUnwindTables()) &&
4039  !Freestanding);
4040  if (Args.hasFlag(options::OPT_funwind_tables, options::OPT_fno_unwind_tables,
4041  AsynchronousUnwindTables))
4042  CmdArgs.push_back("-munwind-tables");
4043 
4044  TC.addClangTargetOptions(Args, CmdArgs, JA.getOffloadingDeviceKind());
4045 
4046  // FIXME: Handle -mtune=.
4047  (void)Args.hasArg(options::OPT_mtune_EQ);
4048 
4049  if (Arg *A = Args.getLastArg(options::OPT_mcmodel_EQ)) {
4050  CmdArgs.push_back("-mcode-model");
4051  CmdArgs.push_back(A->getValue());
4052  }
4053 
4054  // Add the target cpu
4055  std::string CPU = getCPUName(Args, Triple, /*FromAs*/ false);
4056  if (!CPU.empty()) {
4057  CmdArgs.push_back("-target-cpu");
4058  CmdArgs.push_back(Args.MakeArgString(CPU));
4059  }
4060 
4061  RenderTargetOptions(Triple, Args, KernelOrKext, CmdArgs);
4062 
4063  // These two are potentially updated by AddClangCLArgs.
4065  bool EmitCodeView = false;
4066 
4067  // Add clang-cl arguments.
4068  types::ID InputType = Input.getType();
4069  if (D.IsCLMode())
4070  AddClangCLArgs(Args, InputType, CmdArgs, &DebugInfoKind, &EmitCodeView);
4071 
4072  DwarfFissionKind DwarfFission;
4073  RenderDebugOptions(TC, D, RawTriple, Args, EmitCodeView, IsWindowsMSVC,
4074  CmdArgs, DebugInfoKind, DwarfFission);
4075 
4076  // Add the split debug info name to the command lines here so we
4077  // can propagate it to the backend.
4078  bool SplitDWARF = (DwarfFission != DwarfFissionKind::None) &&
4079  TC.getTriple().isOSBinFormatELF() &&
4080  (isa<AssembleJobAction>(JA) || isa<CompileJobAction>(JA) ||
4081  isa<BackendJobAction>(JA));
4082  const char *SplitDWARFOut;
4083  if (SplitDWARF) {
4084  CmdArgs.push_back("-split-dwarf-file");
4085  SplitDWARFOut = SplitDebugName(Args, Input, Output);
4086  CmdArgs.push_back(SplitDWARFOut);
4087  }
4088 
4089  // Pass the linker version in use.
4090  if (Arg *A = Args.getLastArg(options::OPT_mlinker_version_EQ)) {
4091  CmdArgs.push_back("-target-linker-version");
4092  CmdArgs.push_back(A->getValue());
4093  }
4094 
4095  if (!shouldUseLeafFramePointer(Args, RawTriple))
4096  CmdArgs.push_back("-momit-leaf-frame-pointer");
4097 
4098  // Explicitly error on some things we know we don't support and can't just
4099  // ignore.
4100  if (!Args.hasArg(options::OPT_fallow_unsupported)) {
4101  Arg *Unsupported;
4102  if (types::isCXX(InputType) && RawTriple.isOSDarwin() &&
4103  TC.getArch() == llvm::Triple::x86) {
4104  if ((Unsupported = Args.getLastArg(options::OPT_fapple_kext)) ||
4105  (Unsupported = Args.getLastArg(options::OPT_mkernel)))
4106  D.Diag(diag::err_drv_clang_unsupported_opt_cxx_darwin_i386)
4107  << Unsupported->getOption().getName();
4108  }
4109  // The faltivec option has been superseded by the maltivec option.
4110  if ((Unsupported = Args.getLastArg(options::OPT_faltivec)))
4111  D.Diag(diag::err_drv_clang_unsupported_opt_faltivec)
4112  << Unsupported->getOption().getName()
4113  << "please use -maltivec and include altivec.h explicitly";
4114  if ((Unsupported = Args.getLastArg(options::OPT_fno_altivec)))
4115  D.Diag(diag::err_drv_clang_unsupported_opt_faltivec)
4116  << Unsupported->getOption().getName() << "please use -mno-altivec";
4117  }
4118 
4119  Args.AddAllArgs(CmdArgs, options::OPT_v);
4120  Args.AddLastArg(CmdArgs, options::OPT_H);
4121  if (D.CCPrintHeaders && !D.CCGenDiagnostics) {
4122  CmdArgs.push_back("-header-include-file");
4123  CmdArgs.push_back(D.CCPrintHeadersFilename ? D.CCPrintHeadersFilename
4124  : "-");
4125  }
4126  Args.AddLastArg(CmdArgs, options::OPT_P);
4127  Args.AddLastArg(CmdArgs, options::OPT_print_ivar_layout);
4128 
4129  if (D.CCLogDiagnostics && !D.CCGenDiagnostics) {
4130  CmdArgs.push_back("-diagnostic-log-file");
4131  CmdArgs.push_back(D.CCLogDiagnosticsFilename ? D.CCLogDiagnosticsFilename
4132  : "-");
4133  }
4134 
4135  bool UseSeparateSections = isUseSeparateSections(Triple);
4136 
4137  if (Args.hasFlag(options::OPT_ffunction_sections,
4138  options::OPT_fno_function_sections, UseSeparateSections)) {
4139  CmdArgs.push_back("-ffunction-sections");
4140  }
4141 
4142  if (Args.hasFlag(options::OPT_fdata_sections, options::OPT_fno_data_sections,
4143  UseSeparateSections)) {
4144  CmdArgs.push_back("-fdata-sections");
4145  }
4146 
4147  if (!Args.hasFlag(options::OPT_funique_section_names,
4148  options::OPT_fno_unique_section_names, true))
4149  CmdArgs.push_back("-fno-unique-section-names");
4150 
4151  if (auto *A = Args.getLastArg(
4152  options::OPT_finstrument_functions,
4153  options::OPT_finstrument_functions_after_inlining,
4154  options::OPT_finstrument_function_entry_bare))
4155  A->render(Args, CmdArgs);
4156 
4157  // NVPTX doesn't support PGO or coverage. There's no runtime support for
4158  // sampling, overhead of call arc collection is way too high and there's no
4159  // way to collect the output.
4160  if (!Triple.isNVPTX())
4161  addPGOAndCoverageFlags(C, D, Output, Args, CmdArgs);
4162 
4163  if (auto *ABICompatArg = Args.getLastArg(options::OPT_fclang_abi_compat_EQ))
4164  ABICompatArg->render(Args, CmdArgs);
4165 
4166  // Add runtime flag for PS4 when PGO, coverage, or sanitizers are enabled.
4167  if (RawTriple.isPS4CPU() &&
4168  !Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
4169  PS4cpu::addProfileRTArgs(TC, Args, CmdArgs);
4170  PS4cpu::addSanitizerArgs(TC, CmdArgs);
4171  }
4172 
4173  // Pass options for controlling the default header search paths.
4174  if (Args.hasArg(options::OPT_nostdinc)) {
4175  CmdArgs.push_back("-nostdsysteminc");
4176  CmdArgs.push_back("-nobuiltininc");
4177  } else {
4178  if (Args.hasArg(options::OPT_nostdlibinc))
4179  CmdArgs.push_back("-nostdsysteminc");
4180  Args.AddLastArg(CmdArgs, options::OPT_nostdincxx);
4181  Args.AddLastArg(CmdArgs, options::OPT_nobuiltininc);
4182  }
4183 
4184  // Pass the path to compiler resource files.
4185  CmdArgs.push_back("-resource-dir");
4186  CmdArgs.push_back(D.ResourceDir.c_str());
4187 
4188  Args.AddLastArg(CmdArgs, options::OPT_working_directory);
4189 
4190  RenderARCMigrateToolOptions(D, Args, CmdArgs);
4191 
4192  // Add preprocessing options like -I, -D, etc. if we are using the
4193  // preprocessor.
4194  //
4195  // FIXME: Support -fpreprocessed
4197  AddPreprocessingOptions(C, JA, D, Args, CmdArgs, Output, Inputs);
4198 
4199  // Don't warn about "clang -c -DPIC -fPIC test.i" because libtool.m4 assumes
4200  // that "The compiler can only warn and ignore the option if not recognized".
4201  // When building with ccache, it will pass -D options to clang even on
4202  // preprocessed inputs and configure concludes that -fPIC is not supported.
4203  Args.ClaimAllArgs(options::OPT_D);
4204 
4205  // Manually translate -O4 to -O3; let clang reject others.
4206  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
4207  if (A->getOption().matches(options::OPT_O4)) {
4208  CmdArgs.push_back("-O3");
4209  D.Diag(diag::warn_O4_is_O3);
4210  } else {
4211  A->render(Args, CmdArgs);
4212  }
4213  }
4214 
4215  // Warn about ignored options to clang.
4216  for (const Arg *A :
4217  Args.filtered(options::OPT_clang_ignored_gcc_optimization_f_Group)) {
4218  D.Diag(diag::warn_ignored_gcc_optimization) << A->getAsString(Args);
4219  A->claim();
4220  }
4221 
4222  for (const Arg *A :
4223  Args.filtered(options::OPT_clang_ignored_legacy_options_Group)) {
4224  D.Diag(diag::warn_ignored_clang_option) << A->getAsString(Args);
4225  A->claim();
4226  }
4227 
4228  claimNoWarnArgs(Args);
4229 
4230  Args.AddAllArgs(CmdArgs, options::OPT_R_Group);
4231 
4232  Args.AddAllArgs(CmdArgs, options::OPT_W_Group);
4233  if (Args.hasFlag(options::OPT_pedantic, options::OPT_no_pedantic, false))
4234  CmdArgs.push_back("-pedantic");
4235  Args.AddLastArg(CmdArgs, options::OPT_pedantic_errors);
4236  Args.AddLastArg(CmdArgs, options::OPT_w);
4237 
4238  // Fixed point flags
4239  if (Args.hasFlag(options::OPT_ffixed_point, options::OPT_fno_fixed_point,
4240  /*Default=*/false))
4241  Args.AddLastArg(CmdArgs, options::OPT_ffixed_point);
4242 
4243  // Handle -{std, ansi, trigraphs} -- take the last of -{std, ansi}
4244  // (-ansi is equivalent to -std=c89 or -std=c++98).
4245  //
4246  // If a std is supplied, only add -trigraphs if it follows the
4247  // option.
4248  bool ImplyVCPPCXXVer = false;
4249  const Arg *Std = Args.getLastArg(options::OPT_std_EQ, options::OPT_ansi);
4250  if (Std) {
4251  if (Std->getOption().matches(options::OPT_ansi))
4252  if (types::isCXX(InputType))
4253  CmdArgs.push_back("-std=c++98");
4254  else
4255  CmdArgs.push_back("-std=c89");
4256  else
4257  Std->render(Args, CmdArgs);
4258 
4259  // If -f(no-)trigraphs appears after the language standard flag, honor it.
4260  if (Arg *A = Args.getLastArg(options::OPT_std_EQ, options::OPT_ansi,
4261  options::OPT_ftrigraphs,
4262  options::OPT_fno_trigraphs))
4263  if (A != Std)
4264  A->render(Args, CmdArgs);
4265  } else {
4266  // Honor -std-default.
4267  //
4268  // FIXME: Clang doesn't correctly handle -std= when the input language
4269  // doesn't match. For the time being just ignore this for C++ inputs;
4270  // eventually we want to do all the standard defaulting here instead of
4271  // splitting it between the driver and clang -cc1.
4272  if (!types::isCXX(InputType))
4273  Args.AddAllArgsTranslated(CmdArgs, options::OPT_std_default_EQ, "-std=",
4274  /*Joined=*/true);
4275  else if (IsWindowsMSVC)
4276  ImplyVCPPCXXVer = true;
4277 
4278  Args.AddLastArg(CmdArgs, options::OPT_ftrigraphs,
4279  options::OPT_fno_trigraphs);
4280  }
4281 
4282  // GCC's behavior for -Wwrite-strings is a bit strange:
4283  // * In C, this "warning flag" changes the types of string literals from
4284  // 'char[N]' to 'const char[N]', and thus triggers an unrelated warning
4285  // for the discarded qualifier.
4286  // * In C++, this is just a normal warning flag.
4287  //
4288  // Implementing this warning correctly in C is hard, so we follow GCC's
4289  // behavior for now. FIXME: Directly diagnose uses of a string literal as
4290  // a non-const char* in C, rather than using this crude hack.
4291  if (!types::isCXX(InputType)) {
4292  // FIXME: This should behave just like a warning flag, and thus should also
4293  // respect -Weverything, -Wno-everything, -Werror=write-strings, and so on.
4294  Arg *WriteStrings =
4295  Args.getLastArg(options::OPT_Wwrite_strings,
4296  options::OPT_Wno_write_strings, options::OPT_w);
4297  if (WriteStrings &&
4298  WriteStrings->getOption().matches(options::OPT_Wwrite_strings))
4299  CmdArgs.push_back("-fconst-strings");
4300  }
4301 
4302  // GCC provides a macro definition '__DEPRECATED' when -Wdeprecated is active
4303  // during C++ compilation, which it is by default. GCC keeps this define even
4304  // in the presence of '-w', match this behavior bug-for-bug.
4305  if (types::isCXX(InputType) &&
4306  Args.hasFlag(options::OPT_Wdeprecated, options::OPT_Wno_deprecated,
4307  true)) {
4308  CmdArgs.push_back("-fdeprecated-macro");
4309  }
4310 
4311  // Translate GCC's misnamer '-fasm' arguments to '-fgnu-keywords'.
4312  if (Arg *Asm = Args.getLastArg(options::OPT_fasm, options::OPT_fno_asm)) {
4313  if (Asm->getOption().matches(options::OPT_fasm))
4314  CmdArgs.push_back("-fgnu-keywords");
4315  else
4316  CmdArgs.push_back("-fno-gnu-keywords");
4317  }
4318 
4319  if (ShouldDisableDwarfDirectory(Args, TC))
4320  CmdArgs.push_back("-fno-dwarf-directory-asm");
4321 
4322  if (ShouldDisableAutolink(Args, TC))
4323  CmdArgs.push_back("-fno-autolink");
4324 
4325  // Add in -fdebug-compilation-dir if necessary.
4326  addDebugCompDirArg(Args, CmdArgs);
4327 
4328  addDebugPrefixMapArg(D, Args, CmdArgs);
4329 
4330  if (Arg *A = Args.getLastArg(options::OPT_ftemplate_depth_,
4331  options::OPT_ftemplate_depth_EQ)) {
4332  CmdArgs.push_back("-ftemplate-depth");
4333  CmdArgs.push_back(A->getValue());
4334  }
4335 
4336  if (Arg *A = Args.getLastArg(options::OPT_foperator_arrow_depth_EQ)) {
4337  CmdArgs.push_back("-foperator-arrow-depth");
4338  CmdArgs.push_back(A->getValue());
4339  }
4340 
4341  if (Arg *A = Args.getLastArg(options::OPT_fconstexpr_depth_EQ)) {
4342  CmdArgs.push_back("-fconstexpr-depth");
4343  CmdArgs.push_back(A->getValue());
4344  }
4345 
4346  if (Arg *A = Args.getLastArg(options::OPT_fconstexpr_steps_EQ)) {
4347  CmdArgs.push_back("-fconstexpr-steps");
4348  CmdArgs.push_back(A->getValue());
4349  }
4350 
4351  if (Arg *A = Args.getLastArg(options::OPT_fbracket_depth_EQ)) {
4352  CmdArgs.push_back("-fbracket-depth");
4353  CmdArgs.push_back(A->getValue());
4354  }
4355 
4356  if (Arg *A = Args.getLastArg(options::OPT_Wlarge_by_value_copy_EQ,
4357  options::OPT_Wlarge_by_value_copy_def)) {
4358  if (A->getNumValues()) {
4359  StringRef bytes = A->getValue();
4360  CmdArgs.push_back(Args.MakeArgString("-Wlarge-by-value-copy=" + bytes));
4361  } else
4362  CmdArgs.push_back("-Wlarge-by-value-copy=64"); // default value
4363  }
4364 
4365  if (Args.hasArg(options::OPT_relocatable_pch))
4366  CmdArgs.push_back("-relocatable-pch");
4367 
4368  if (const Arg *A = Args.getLastArg(options::OPT_fcf_runtime_abi_EQ)) {
4369  static const char *kCFABIs[] = {
4370  "standalone", "objc", "swift", "swift-5.0", "swift-4.2", "swift-4.1",
4371  };
4372 
4373  if (find(kCFABIs, StringRef(A->getValue())) == std::end(kCFABIs))
4374  D.Diag(diag::err_drv_invalid_cf_runtime_abi) << A->getValue();
4375  else
4376  A->render(Args, CmdArgs);
4377  }
4378 
4379  if (Arg *A = Args.getLastArg(options::OPT_fconstant_string_class_EQ)) {
4380  CmdArgs.push_back("-fconstant-string-class");
4381  CmdArgs.push_back(A->getValue());
4382  }
4383 
4384  if (Arg *A = Args.getLastArg(options::OPT_ftabstop_EQ)) {
4385  CmdArgs.push_back("-ftabstop");
4386  CmdArgs.push_back(A->getValue());
4387  }
4388 
4389  if (Args.hasFlag(options::OPT_fstack_size_section,
4390  options::OPT_fno_stack_size_section, RawTriple.isPS4()))
4391  CmdArgs.push_back("-fstack-size-section");
4392 
4393  CmdArgs.push_back("-ferror-limit");
4394  if (Arg *A = Args.getLastArg(options::OPT_ferror_limit_EQ))
4395  CmdArgs.push_back(A->getValue());
4396  else
4397  CmdArgs.push_back("19");
4398 
4399  if (Arg *A = Args.getLastArg(options::OPT_fmacro_backtrace_limit_EQ)) {
4400  CmdArgs.push_back("-fmacro-backtrace-limit");
4401  CmdArgs.push_back(A->getValue());
4402  }
4403 
4404  if (Arg *A = Args.getLastArg(options::OPT_ftemplate_backtrace_limit_EQ)) {
4405  CmdArgs.push_back("-ftemplate-backtrace-limit");
4406  CmdArgs.push_back(A->getValue());
4407  }
4408 
4409  if (Arg *A = Args.getLastArg(options::OPT_fconstexpr_backtrace_limit_EQ)) {
4410  CmdArgs.push_back("-fconstexpr-backtrace-limit");
4411  CmdArgs.push_back(A->getValue());
4412  }
4413 
4414  if (Arg *A = Args.getLastArg(options::OPT_fspell_checking_limit_EQ)) {
4415  CmdArgs.push_back("-fspell-checking-limit");
4416  CmdArgs.push_back(A->getValue());
4417  }
4418 
4419  // Pass -fmessage-length=.
4420  CmdArgs.push_back("-fmessage-length");
4421  if (Arg *A = Args.getLastArg(options::OPT_fmessage_length_EQ)) {
4422  CmdArgs.push_back(A->getValue());
4423  } else {
4424  // If -fmessage-length=N was not specified, determine whether this is a
4425  // terminal and, if so, implicitly define -fmessage-length appropriately.
4426  unsigned N = llvm::sys::Process::StandardErrColumns();
4427  CmdArgs.push_back(Args.MakeArgString(Twine(N)));
4428  }
4429 
4430  // -fvisibility= and -fvisibility-ms-compat are of a piece.
4431  if (const Arg *A = Args.getLastArg(options::OPT_fvisibility_EQ,
4432  options::OPT_fvisibility_ms_compat)) {
4433  if (A->getOption().matches(options::OPT_fvisibility_EQ)) {
4434  CmdArgs.push_back("-fvisibility");
4435  CmdArgs.push_back(A->getValue());
4436  } else {
4437  assert(A->getOption().matches(options::OPT_fvisibility_ms_compat));
4438  CmdArgs.push_back("-fvisibility");
4439  CmdArgs.push_back("hidden");
4440  CmdArgs.push_back("-ftype-visibility");
4441  CmdArgs.push_back("default");
4442  }
4443  }
4444 
4445  Args.AddLastArg(CmdArgs, options::OPT_fvisibility_inlines_hidden);
4446  Args.AddLastArg(CmdArgs, options::OPT_fvisibility_global_new_delete_hidden);
4447 
4448  Args.AddLastArg(CmdArgs, options::OPT_ftlsmodel_EQ);
4449 
4450  // Forward -f (flag) options which we can pass directly.
4451  Args.AddLastArg(CmdArgs, options::OPT_femit_all_decls);
4452  Args.AddLastArg(CmdArgs, options::OPT_fheinous_gnu_extensions);
4453  Args.AddLastArg(CmdArgs, options::OPT_fdigraphs, options::OPT_fno_digraphs);
4454  Args.AddLastArg(CmdArgs, options::OPT_fno_operator_names);
4455  Args.AddLastArg(CmdArgs, options::OPT_femulated_tls,
4456  options::OPT_fno_emulated_tls);
4457  Args.AddLastArg(CmdArgs, options::OPT_fkeep_static_consts);
4458 
4459  // AltiVec-like language extensions aren't relevant for assembling.
4460  if (!isa<PreprocessJobAction>(JA) || Output.getType() != types::TY_PP_Asm)
4461  Args.AddLastArg(CmdArgs, options::OPT_fzvector);
4462 
4463  Args.AddLastArg(CmdArgs, options::OPT_fdiagnostics_show_template_tree);
4464  Args.AddLastArg(CmdArgs, options::OPT_fno_elide_type);
4465 
4466  // Forward flags for OpenMP. We don't do this if the current action is an
4467  // device offloading action other than OpenMP.
4468  if (Args.hasFlag(options::OPT_fopenmp, options::OPT_fopenmp_EQ,
4469  options::OPT_fno_openmp, false) &&
4472  switch (D.getOpenMPRuntime(Args)) {
4473  case Driver::OMPRT_OMP:
4474  case Driver::OMPRT_IOMP5:
4475  // Clang can generate useful OpenMP code for these two runtime libraries.
4476  CmdArgs.push_back("-fopenmp");
4477 
4478  // If no option regarding the use of TLS in OpenMP codegeneration is
4479  // given, decide a default based on the target. Otherwise rely on the
4480  // options and pass the right information to the frontend.
4481  if (!Args.hasFlag(options::OPT_fopenmp_use_tls,
4482  options::OPT_fnoopenmp_use_tls, /*Default=*/true))
4483  CmdArgs.push_back("-fnoopenmp-use-tls");
4484  Args.AddLastArg(CmdArgs, options::OPT_fopenmp_simd,
4485  options::OPT_fno_openmp_simd);
4486  Args.AddAllArgs(CmdArgs, options::OPT_fopenmp_version_EQ);
4487  Args.AddAllArgs(CmdArgs, options::OPT_fopenmp_cuda_number_of_sm_EQ);
4488  Args.AddAllArgs(CmdArgs, options::OPT_fopenmp_cuda_blocks_per_sm_EQ);
4489  Args.AddAllArgs(CmdArgs,
4490  options::OPT_fopenmp_cuda_teams_reduction_recs_num_EQ);
4491  if (Args.hasFlag(options::OPT_fopenmp_optimistic_collapse,
4492  options::OPT_fno_openmp_optimistic_collapse,
4493  /*Default=*/false))
4494  CmdArgs.push_back("-fopenmp-optimistic-collapse");
4495 
4496  // When in OpenMP offloading mode with NVPTX target, forward
4497  // cuda-mode flag
4498  if (Args.hasFlag(options::OPT_fopenmp_cuda_mode,
4499  options::OPT_fno_openmp_cuda_mode, /*Default=*/false))
4500  CmdArgs.push_back("-fopenmp-cuda-mode");
4501 
4502  // When in OpenMP offloading mode with NVPTX target, check if full runtime
4503  // is required.
4504  if (Args.hasFlag(options::OPT_fopenmp_cuda_force_full_runtime,
4505  options::OPT_fno_openmp_cuda_force_full_runtime,
4506  /*Default=*/false))
4507  CmdArgs.push_back("-fopenmp-cuda-force-full-runtime");
4508  break;
4509  default:
4510  // By default, if Clang doesn't know how to generate useful OpenMP code
4511  // for a specific runtime library, we just don't pass the '-fopenmp' flag
4512  // down to the actual compilation.
4513  // FIXME: It would be better to have a mode which *only* omits IR
4514  // generation based on the OpenMP support so that we get consistent
4515  // semantic analysis, etc.
4516  break;
4517  }
4518  } else {
4519  Args.AddLastArg(CmdArgs, options::OPT_fopenmp_simd,
4520  options::OPT_fno_openmp_simd);
4521  Args.AddAllArgs(CmdArgs, options::OPT_fopenmp_version_EQ);
4522  }
4523 
4524  const SanitizerArgs &Sanitize = TC.getSanitizerArgs();
4525  Sanitize.addArgs(TC, Args, CmdArgs, InputType);
4526 
4527  const XRayArgs &XRay = TC.getXRayArgs();
4528  XRay.addArgs(TC, Args, CmdArgs, InputType);
4529 
4530  if (TC.SupportsProfiling())
4531  Args.AddLastArg(CmdArgs, options::OPT_pg);
4532 
4533  if (TC.SupportsProfiling())
4534  Args.AddLastArg(CmdArgs, options::OPT_mfentry);
4535 
4536  // -flax-vector-conversions is default.
4537  if (!Args.hasFlag(options::OPT_flax_vector_conversions,
4538  options::OPT_fno_lax_vector_conversions))
4539  CmdArgs.push_back("-fno-lax-vector-conversions");
4540 
4541  if (Args.getLastArg(options::OPT_fapple_kext) ||
4542  (Args.hasArg(options::OPT_mkernel) && types::isCXX(InputType)))
4543  CmdArgs.push_back("-fapple-kext");
4544 
4545  Args.AddLastArg(CmdArgs, options::OPT_fobjc_sender_dependent_dispatch);
4546  Args.AddLastArg(CmdArgs, options::OPT_fdiagnostics_print_source_range_info);
4547  Args.AddLastArg(CmdArgs, options::OPT_fdiagnostics_parseable_fixits);
4548  Args.AddLastArg(CmdArgs, options::OPT_ftime_report);
4549  Args.AddLastArg(CmdArgs, options::OPT_ftime_trace);
4550  Args.AddLastArg(CmdArgs, options::OPT_ftrapv);
4551  Args.AddLastArg(CmdArgs, options::OPT_malign_double);
4552 
4553  if (Arg *A = Args.getLastArg(options::OPT_ftrapv_handler_EQ)) {
4554  CmdArgs.push_back("-ftrapv-handler");
4555  CmdArgs.push_back(A->getValue());
4556  }
4557 
4558  Args.AddLastArg(CmdArgs, options::OPT_ftrap_function_EQ);
4559 
4560  // -fno-strict-overflow implies -fwrapv if it isn't disabled, but
4561  // -fstrict-overflow won't turn off an explicitly enabled -fwrapv.
4562  if (Arg *A = Args.getLastArg(options::OPT_fwrapv, options::OPT_fno_wrapv)) {
4563  if (A->getOption().matches(options::OPT_fwrapv))
4564  CmdArgs.push_back("-fwrapv");
4565  } else if (Arg *A = Args.getLastArg(options::OPT_fstrict_overflow,
4566  options::OPT_fno_strict_overflow)) {
4567  if (A->getOption().matches(options::OPT_fno_strict_overflow))
4568  CmdArgs.push_back("-fwrapv");
4569  }
4570 
4571  if (Arg *A = Args.getLastArg(options::OPT_freroll_loops,
4572  options::OPT_fno_reroll_loops))
4573  if (A->getOption().matches(options::OPT_freroll_loops))
4574  CmdArgs.push_back("-freroll-loops");
4575 
4576  Args.AddLastArg(CmdArgs, options::OPT_fwritable_strings);
4577  Args.AddLastArg(CmdArgs, options::OPT_funroll_loops,
4578  options::OPT_fno_unroll_loops);
4579 
4580  Args.AddLastArg(CmdArgs, options::OPT_pthread);
4581 
4582  if (Args.hasFlag(options::OPT_mspeculative_load_hardening, options::OPT_mno_speculative_load_hardening,
4583  false))
4584  CmdArgs.push_back(Args.MakeArgString("-mspeculative-load-hardening"));
4585 
4586  RenderSSPOptions(TC, Args, CmdArgs, KernelOrKext);
4587  RenderTrivialAutoVarInitOptions(D, TC, Args, CmdArgs);
4588 
4589  // Translate -mstackrealign
4590  if (Args.hasFlag(options::OPT_mstackrealign, options::OPT_mno_stackrealign,
4591  false))
4592  CmdArgs.push_back(Args.MakeArgString("-mstackrealign"));
4593 
4594  if (Args.hasArg(options::OPT_mstack_alignment)) {
4595  StringRef alignment = Args.getLastArgValue(options::OPT_mstack_alignment);
4596  CmdArgs.push_back(Args.MakeArgString("-mstack-alignment=" + alignment));
4597  }
4598 
4599  if (Args.hasArg(options::OPT_mstack_probe_size)) {
4600  StringRef Size = Args.getLastArgValue(options::OPT_mstack_probe_size);
4601 
4602  if (!Size.empty())
4603  CmdArgs.push_back(Args.MakeArgString("-mstack-probe-size=" + Size));
4604  else
4605  CmdArgs.push_back("-mstack-probe-size=0");
4606  }
4607 
4608  if (!Args.hasFlag(options::OPT_mstack_arg_probe,
4609  options::OPT_mno_stack_arg_probe, true))
4610  CmdArgs.push_back(Args.MakeArgString("-mno-stack-arg-probe"));
4611 
4612  if (Arg *A = Args.getLastArg(options::OPT_mrestrict_it,
4613  options::OPT_mno_restrict_it)) {
4614  if (A->getOption().matches(options::OPT_mrestrict_it)) {
4615  CmdArgs.push_back("-mllvm");
4616  CmdArgs.push_back("-arm-restrict-it");
4617  } else {
4618  CmdArgs.push_back("-mllvm");
4619  CmdArgs.push_back("-arm-no-restrict-it");
4620  }
4621  } else if (Triple.isOSWindows() &&
4622  (Triple.getArch() == llvm::Triple::arm ||
4623  Triple.getArch() == llvm::Triple::thumb)) {
4624  // Windows on ARM expects restricted IT blocks
4625  CmdArgs.push_back("-mllvm");
4626  CmdArgs.push_back("-arm-restrict-it");
4627  }
4628 
4629  // Forward -cl options to -cc1
4630  RenderOpenCLOptions(Args, CmdArgs);
4631 
4632  if (Arg *A = Args.getLastArg(options::OPT_fcf_protection_EQ)) {
4633  CmdArgs.push_back(
4634  Args.MakeArgString(Twine("-fcf-protection=") + A->getValue()));
4635  }
4636 
4637  // Forward -f options with positive and negative forms; we translate
4638  // these by hand.
4639  if (Arg *A = getLastProfileSampleUseArg(Args)) {
4640  auto *PGOArg = Args.getLastArg(
4641  options::OPT_fprofile_generate, options::OPT_fprofile_generate_EQ,
4642  options::OPT_fcs_profile_generate, options::OPT_fcs_profile_generate_EQ,
4643  options::OPT_fprofile_use, options::OPT_fprofile_use_EQ);
4644  if (PGOArg)
4645  D.Diag(diag::err_drv_argument_not_allowed_with)
4646  << "SampleUse with PGO options";
4647 
4648  StringRef fname = A->getValue();
4649  if (!llvm::sys::fs::exists(fname))
4650  D.Diag(diag::err_drv_no_such_file) << fname;
4651  else
4652  A->render(Args, CmdArgs);
4653  }
4654  Args.AddLastArg(CmdArgs, options::OPT_fprofile_remapping_file_EQ);
4655 
4656  RenderBuiltinOptions(TC, RawTriple, Args, CmdArgs);
4657 
4658  if (!Args.hasFlag(options::OPT_fassume_sane_operator_new,
4659  options::OPT_fno_assume_sane_operator_new))
4660  CmdArgs.push_back("-fno-assume-sane-operator-new");
4661 
4662  // -fblocks=0 is default.
4663  if (Args.hasFlag(options::OPT_fblocks, options::OPT_fno_blocks,
4664  TC.IsBlocksDefault()) ||
4665  (Args.hasArg(options::OPT_fgnu_runtime) &&
4666  Args.hasArg(options::OPT_fobjc_nonfragile_abi) &&
4667  !Args.hasArg(options::OPT_fno_blocks))) {
4668  CmdArgs.push_back("-fblocks");
4669 
4670  if (!Args.hasArg(options::OPT_fgnu_runtime) && !TC.hasBlocksRuntime())
4671  CmdArgs.push_back("-fblocks-runtime-optional");
4672  }
4673 
4674  // -fencode-extended-block-signature=1 is default.
4675  if (TC.IsEncodeExtendedBlockSignatureDefault())
4676  CmdArgs.push_back("-fencode-extended-block-signature");
4677 
4678  if (Args.hasFlag(options::OPT_fcoroutines_ts, options::OPT_fno_coroutines_ts,
4679  false) &&
4680  types::isCXX(InputType)) {
4681  CmdArgs.push_back("-fcoroutines-ts");
4682  }
4683 
4684  Args.AddLastArg(CmdArgs, options::OPT_fdouble_square_bracket_attributes,
4685  options::OPT_fno_double_square_bracket_attributes);
4686 
4687  // -faccess-control is default.
4688  if (Args.hasFlag(options::OPT_fno_access_control,
4689  options::OPT_faccess_control, false))
4690  CmdArgs.push_back("-fno-access-control");
4691 
4692  // -felide-constructors is the default.
4693  if (Args.hasFlag(options::OPT_fno_elide_constructors,
4694  options::OPT_felide_constructors, false))
4695  CmdArgs.push_back("-fno-elide-constructors");
4696 
4697  ToolChain::RTTIMode RTTIMode = TC.getRTTIMode();
4698 
4699  if (KernelOrKext || (types::isCXX(InputType) &&
4700  (RTTIMode == ToolChain::RM_Disabled)))
4701  CmdArgs.push_back("-fno-rtti");
4702 
4703  // -fshort-enums=0 is default for all architectures except Hexagon.
4704  if (Args.hasFlag(options::OPT_fshort_enums, options::OPT_fno_short_enums,
4705  TC.getArch() == llvm::Triple::hexagon))
4706  CmdArgs.push_back("-fshort-enums");
4707 
4708  RenderCharacterOptions(Args, AuxTriple ? *AuxTriple : RawTriple, CmdArgs);
4709 
4710  // -fuse-cxa-atexit is default.
4711  if (!Args.hasFlag(
4712  options::OPT_fuse_cxa_atexit, options::OPT_fno_use_cxa_atexit,
4713  !RawTriple.isOSWindows() &&
4714  RawTriple.getOS() != llvm::Triple::Solaris &&
4715  TC.getArch() != llvm::Triple::xcore &&
4716  ((RawTriple.getVendor() != llvm::Triple::MipsTechnologies) ||
4717  RawTriple.hasEnvironment())) ||
4718  KernelOrKext)
4719  CmdArgs.push_back("-fno-use-cxa-atexit");
4720 
4721  if (Args.hasFlag(options::OPT_fregister_global_dtors_with_atexit,
4722  options::OPT_fno_register_global_dtors_with_atexit,
4723  RawTriple.isOSDarwin() && !KernelOrKext))
4724  CmdArgs.push_back("-fregister-global-dtors-with-atexit");
4725 
4726  // -fms-extensions=0 is default.
4727  if (Args.hasFlag(options::OPT_fms_extensions, options::OPT_fno_ms_extensions,
4728  IsWindowsMSVC))
4729  CmdArgs.push_back("-fms-extensions");
4730 
4731  // -fno-use-line-directives is default.
4732  if (Args.hasFlag(options::OPT_fuse_line_directives,
4733  options::OPT_fno_use_line_directives, false))
4734  CmdArgs.push_back("-fuse-line-directives");
4735 
4736  // -fms-compatibility=0 is default.
4737  if (Args.hasFlag(options::OPT_fms_compatibility,
4738  options::OPT_fno_ms_compatibility,
4739  (IsWindowsMSVC &&
4740  Args.hasFlag(options::OPT_fms_extensions,
4741  options::OPT_fno_ms_extensions, true))))
4742  CmdArgs.push_back("-fms-compatibility");
4743 
4744  VersionTuple MSVT = TC.computeMSVCVersion(&D, Args);
4745  if (!MSVT.empty())
4746  CmdArgs.push_back(
4747  Args.MakeArgString("-fms-compatibility-version=" + MSVT.getAsString()));
4748 
4749  bool IsMSVC2015Compatible = MSVT.getMajor() >= 19;
4750  if (ImplyVCPPCXXVer) {
4751  StringRef LanguageStandard;
4752  if (const Arg *StdArg = Args.getLastArg(options::OPT__SLASH_std)) {
4753  Std = StdArg;
4754  LanguageStandard = llvm::StringSwitch<StringRef>(StdArg->getValue())
4755  .Case("c++14", "-std=c++14")
4756  .Case("c++17", "-std=c++17")
4757  .Case("c++latest", "-std=c++2a")
4758  .Default("");
4759  if (LanguageStandard.empty())
4760  D.Diag(clang::diag::warn_drv_unused_argument)
4761  << StdArg->getAsString(Args);
4762  }
4763 
4764  if (LanguageStandard.empty()) {
4765  if (IsMSVC2015Compatible)
4766  LanguageStandard = "-std=c++14";
4767  else
4768  LanguageStandard = "-std=c++11";
4769  }
4770 
4771  CmdArgs.push_back(LanguageStandard.data());
4772  }
4773 
4774  // -fno-borland-extensions is default.
4775  if (Args.hasFlag(options::OPT_fborland_extensions,
4776  options::OPT_fno_borland_extensions, false))
4777  CmdArgs.push_back("-fborland-extensions");
4778 
4779  // -fno-declspec is default, except for PS4.
4780  if (Args.hasFlag(options::OPT_fdeclspec, options::OPT_fno_declspec,
4781  RawTriple.isPS4()))
4782  CmdArgs.push_back("-fdeclspec");
4783  else if (Args.hasArg(options::OPT_fno_declspec))
4784  CmdArgs.push_back("-fno-declspec"); // Explicitly disabling __declspec.
4785 
4786  // -fthreadsafe-static is default, except for MSVC compatibility versions less
4787  // than 19.
4788  if (!Args.hasFlag(options::OPT_fthreadsafe_statics,
4789  options::OPT_fno_threadsafe_statics,
4790  !IsWindowsMSVC || IsMSVC2015Compatible))
4791  CmdArgs.push_back("-fno-threadsafe-statics");
4792 
4793  // -fno-delayed-template-parsing is default, except when targeting MSVC.
4794  // Many old Windows SDK versions require this to parse.
4795  // FIXME: MSVC introduced /Zc:twoPhase- to disable this behavior in their
4796  // compiler. We should be able to disable this by default at some point.
4797  if (Args.hasFlag(options::OPT_fdelayed_template_parsing,
4798  options::OPT_fno_delayed_template_parsing, IsWindowsMSVC))
4799  CmdArgs.push_back("-fdelayed-template-parsing");
4800 
4801  // -fgnu-keywords default varies depending on language; only pass if
4802  // specified.
4803  if (Arg *A = Args.getLastArg(options::OPT_fgnu_keywords,
4804  options::OPT_fno_gnu_keywords))
4805  A->render(Args, CmdArgs);
4806 
4807  if (Args.hasFlag(options::OPT_fgnu89_inline, options::OPT_fno_gnu89_inline,
4808  false))
4809  CmdArgs.push_back("-fgnu89-inline");
4810 
4811  if (Args.hasArg(options::OPT_fno_inline))
4812  CmdArgs.push_back("-fno-inline");
4813 
4814  if (Arg* InlineArg = Args.getLastArg(options::OPT_finline_functions,
4815  options::OPT_finline_hint_functions,
4816  options::OPT_fno_inline_functions))
4817  InlineArg->render(Args, CmdArgs);
4818 
4819  // FIXME: Find a better way to determine whether the language has modules
4820  // support by default, or just assume that all languages do.
4821  bool HaveModules =
4822  Std && (Std->containsValue("c++2a") || Std->containsValue("c++latest"));
4823  RenderModulesOptions(C, D, Args, Input, Output, CmdArgs, HaveModules);
4824 
4825  Args.AddLastArg(CmdArgs, options::OPT_fexperimental_new_pass_manager,
4826  options::OPT_fno_experimental_new_pass_manager);
4827 
4828  ObjCRuntime Runtime = AddObjCRuntimeArgs(Args, CmdArgs, rewriteKind);
4829  RenderObjCOptions(TC, D, RawTriple, Args, Runtime, rewriteKind != RK_None,
4830  Input, CmdArgs);
4831 
4832  if (Args.hasFlag(options::OPT_fapplication_extension,
4833  options::OPT_fno_application_extension, false))
4834  CmdArgs.push_back("-fapplication-extension");
4835 
4836  // Handle GCC-style exception args.
4837  if (!C.getDriver().IsCLMode())
4838  addExceptionArgs(Args, InputType, TC, KernelOrKext, Runtime, CmdArgs);
4839 
4840  // Handle exception personalities
4841  Arg *A = Args.getLastArg(options::OPT_fsjlj_exceptions,
4842  options::OPT_fseh_exceptions,
4843  options::OPT_fdwarf_exceptions);
4844  if (A) {
4845  const Option &Opt = A->getOption();
4846  if (Opt.matches(options::OPT_fsjlj_exceptions))
4847  CmdArgs.push_back("-fsjlj-exceptions");
4848  if (Opt.matches(options::OPT_fseh_exceptions))
4849  CmdArgs.push_back("-fseh-exceptions");
4850  if (Opt.matches(options::OPT_fdwarf_exceptions))
4851  CmdArgs.push_back("-fdwarf-exceptions");
4852  } else {
4853  switch (TC.GetExceptionModel(Args)) {
4854  default:
4855  break;
4856  case llvm::ExceptionHandling::DwarfCFI:
4857  CmdArgs.push_back("-fdwarf-exceptions");
4858  break;
4859  case llvm::ExceptionHandling::SjLj:
4860  CmdArgs.push_back("-fsjlj-exceptions");
4861  break;
4862  case llvm::ExceptionHandling::WinEH:
4863  CmdArgs.push_back("-fseh-exceptions");
4864  break;
4865  }
4866  }
4867 
4868  // C++ "sane" operator new.
4869  if (!Args.hasFlag(options::OPT_fassume_sane_operator_new,
4870  options::OPT_fno_assume_sane_operator_new))
4871  CmdArgs.push_back("-fno-assume-sane-operator-new");
4872 
4873  // -frelaxed-template-template-args is off by default, as it is a severe
4874  // breaking change until a corresponding change to template partial ordering
4875  // is provided.
4876  if (Args.hasFlag(options::OPT_frelaxed_template_template_args,
4877  options::OPT_fno_relaxed_template_template_args, false))
4878  CmdArgs.push_back("-frelaxed-template-template-args");
4879 
4880  // -fsized-deallocation is off by default, as it is an ABI-breaking change for
4881  // most platforms.
4882  if (Args.hasFlag(options::OPT_fsized_deallocation,
4883  options::OPT_fno_sized_deallocation, false))
4884  CmdArgs.push_back("-fsized-deallocation");
4885 
4886  // -faligned-allocation is on by default in C++17 onwards and otherwise off
4887  // by default.
4888  if (Arg *A = Args.getLastArg(options::OPT_faligned_allocation,
4889  options::OPT_fno_aligned_allocation,
4890  options::OPT_faligned_new_EQ)) {
4891  if (A->getOption().matches(options::OPT_fno_aligned_allocation))
4892  CmdArgs.push_back("-fno-aligned-allocation");
4893  else
4894  CmdArgs.push_back("-faligned-allocation");
4895  }
4896 
4897  // The default new alignment can be specified using a dedicated option or via
4898  // a GCC-compatible option that also turns on aligned allocation.
4899  if (Arg *A = Args.getLastArg(options::OPT_fnew_alignment_EQ,
4900  options::OPT_faligned_new_EQ))
4901  CmdArgs.push_back(
4902  Args.MakeArgString(Twine("-fnew-alignment=") + A->getValue()));
4903 
4904  // -fconstant-cfstrings is default, and may be subject to argument translation
4905  // on Darwin.
4906  if (!Args.hasFlag(options::OPT_fconstant_cfstrings,
4907  options::OPT_fno_constant_cfstrings) ||
4908  !Args.hasFlag(options::OPT_mconstant_cfstrings,
4909  options::OPT_mno_constant_cfstrings))
4910  CmdArgs.push_back("-fno-constant-cfstrings");
4911 
4912  // -fno-pascal-strings is default, only pass non-default.
4913  if (Args.hasFlag(options::OPT_fpascal_strings,
4914  options::OPT_fno_pascal_strings, false))
4915  CmdArgs.push_back("-fpascal-strings");
4916 
4917  // Honor -fpack-struct= and -fpack-struct, if given. Note that
4918  // -fno-pack-struct doesn't apply to -fpack-struct=.
4919  if (Arg *A = Args.getLastArg(options::OPT_fpack_struct_EQ)) {
4920  std::string PackStructStr = "-fpack-struct=";
4921  PackStructStr += A->getValue();
4922  CmdArgs.push_back(Args.MakeArgString(PackStructStr));
4923  } else if (Args.hasFlag(options::OPT_fpack_struct,
4924  options::OPT_fno_pack_struct, false)) {
4925  CmdArgs.push_back("-fpack-struct=1");
4926  }
4927 
4928  // Handle -fmax-type-align=N and -fno-type-align
4929  bool SkipMaxTypeAlign = Args.hasArg(options::OPT_fno_max_type_align);
4930  if (Arg *A = Args.getLastArg(options::OPT_fmax_type_align_EQ)) {
4931  if (!SkipMaxTypeAlign) {
4932  std::string MaxTypeAlignStr = "-fmax-type-align=";
4933  MaxTypeAlignStr += A->getValue();
4934  CmdArgs.push_back(Args.MakeArgString(MaxTypeAlignStr));
4935  }
4936  } else if (RawTriple.isOSDarwin()) {
4937  if (!SkipMaxTypeAlign) {
4938  std::string MaxTypeAlignStr = "-fmax-type-align=16";
4939  CmdArgs.push_back(Args.MakeArgString(MaxTypeAlignStr));
4940  }
4941  }
4942 
4943  if (!Args.hasFlag(options::OPT_Qy, options::OPT_Qn, true))
4944  CmdArgs.push_back("-Qn");
4945 
4946  // -fcommon is the default unless compiling kernel code or the target says so
4947  bool NoCommonDefault = KernelOrKext || isNoCommonDefault(RawTriple);
4948  if (!Args.hasFlag(options::OPT_fcommon, options::OPT_fno_common,
4949  !NoCommonDefault))
4950  CmdArgs.push_back("-fno-common");
4951 
4952  // -fsigned-bitfields is default, and clang doesn't yet support
4953  // -funsigned-bitfields.
4954  if (!Args.hasFlag(options::OPT_fsigned_bitfields,
4955  options::OPT_funsigned_bitfields))
4956  D.Diag(diag::warn_drv_clang_unsupported)
4957  << Args.getLastArg(options::OPT_funsigned_bitfields)->getAsString(Args);
4958 
4959  // -fsigned-bitfields is default, and clang doesn't support -fno-for-scope.
4960  if (!Args.hasFlag(options::OPT_ffor_scope, options::OPT_fno_for_scope))
4961  D.Diag(diag::err_drv_clang_unsupported)
4962  << Args.getLastArg(options::OPT_fno_for_scope)->getAsString(Args);
4963 
4964  // -finput_charset=UTF-8 is default. Reject others
4965  if (Arg *inputCharset = Args.getLastArg(options::OPT_finput_charset_EQ)) {
4966  StringRef value = inputCharset->getValue();
4967  if (!value.equals_lower("utf-8"))
4968  D.Diag(diag::err_drv_invalid_value) << inputCharset->getAsString(Args)
4969  << value;
4970  }
4971 
4972  // -fexec_charset=UTF-8 is default. Reject others
4973  if (Arg *execCharset = Args.getLastArg(options::OPT_fexec_charset_EQ)) {
4974  StringRef value = execCharset->getValue();
4975  if (!value.equals_lower("utf-8"))
4976  D.Diag(diag::err_drv_invalid_value) << execCharset->getAsString(Args)
4977  << value;
4978  }
4979 
4980  RenderDiagnosticsOptions(D, Args, CmdArgs);
4981 
4982  // -fno-asm-blocks is default.
4983  if (Args.hasFlag(options::OPT_fasm_blocks, options::OPT_fno_asm_blocks,
4984  false))
4985  CmdArgs.push_back("-fasm-blocks");
4986 
4987  // -fgnu-inline-asm is default.
4988  if (!Args.hasFlag(options::OPT_fgnu_inline_asm,
4989  options::OPT_fno_gnu_inline_asm, true))
4990  CmdArgs.push_back("-fno-gnu-inline-asm");
4991 
4992  // Enable vectorization per default according to the optimization level
4993  // selected. For optimization levels that want vectorization we use the alias
4994  // option to simplify the hasFlag logic.
4995  bool EnableVec = shouldEnableVectorizerAtOLevel(Args, false);
4996  OptSpecifier VectorizeAliasOption =
4997  EnableVec ? options::OPT_O_Group : options::OPT_fvectorize;
4998  if (Args.hasFlag(options::OPT_fvectorize, VectorizeAliasOption,
4999  options::OPT_fno_vectorize, EnableVec))
5000  CmdArgs.push_back("-vectorize-loops");
5001 
5002  // -fslp-vectorize is enabled based on the optimization level selected.
5003  bool EnableSLPVec = shouldEnableVectorizerAtOLevel(Args, true);
5004  OptSpecifier SLPVectAliasOption =
5005  EnableSLPVec ? options::OPT_O_Group : options::OPT_fslp_vectorize;
5006  if (Args.hasFlag(options::OPT_fslp_vectorize, SLPVectAliasOption,
5007  options::OPT_fno_slp_vectorize, EnableSLPVec))
5008  CmdArgs.push_back("-vectorize-slp");
5009 
5010  ParseMPreferVectorWidth(D, Args, CmdArgs);
5011 
5012  if (Arg *A = Args.getLastArg(options::OPT_fshow_overloads_EQ))
5013  A->render(Args, CmdArgs);
5014 
5015  if (Arg *A = Args.getLastArg(
5016  options::OPT_fsanitize_undefined_strip_path_components_EQ))
5017  A->render(Args, CmdArgs);
5018 
5019  // -fdollars-in-identifiers default varies depending on platform and
5020  // language; only pass if specified.
5021  if (Arg *A = Args.getLastArg(options::OPT_fdollars_in_identifiers,
5022  options::OPT_fno_dollars_in_identifiers)) {
5023  if (A->getOption().matches(options::OPT_fdollars_in_identifiers))
5024  CmdArgs.push_back("-fdollars-in-identifiers");
5025  else
5026  CmdArgs.push_back("-fno-dollars-in-identifiers");
5027  }
5028 
5029  // -funit-at-a-time is default, and we don't support -fno-unit-at-a-time for
5030  // practical purposes.
5031  if (Arg *A = Args.getLastArg(options::OPT_funit_at_a_time,
5032  options::OPT_fno_unit_at_a_time)) {
5033  if (A->getOption().matches(options::OPT_fno_unit_at_a_time))
5034  D.Diag(diag::warn_drv_clang_unsupported) << A->getAsString(Args);
5035  }
5036 
5037  if (Args.hasFlag(options::OPT_fapple_pragma_pack,
5038  options::OPT_fno_apple_pragma_pack, false))
5039  CmdArgs.push_back("-fapple-pragma-pack");
5040 
5041  // Remarks can be enabled with any of the `-f.*optimization-record.*` flags.
5042  if (Args.hasFlag(options::OPT_fsave_optimization_record,
5043  options::OPT_foptimization_record_file_EQ,
5044  options::OPT_fno_save_optimization_record, false) ||
5045  Args.hasFlag(options::OPT_foptimization_record_passes_EQ,
5046  options::OPT_fno_save_optimization_record, false)) {
5047  CmdArgs.push_back("-opt-record-file");
5048 
5049  const Arg *A = Args.getLastArg(options::OPT_foptimization_record_file_EQ);
5050  if (A) {
5051  CmdArgs.push_back(A->getValue());
5052  } else {
5053  SmallString<128> F;
5054 
5055  if (Args.hasArg(options::OPT_c) || Args.hasArg(options::OPT_S)) {
5056  if (Arg *FinalOutput = Args.getLastArg(options::OPT_o))
5057  F = FinalOutput->getValue();
5058  }
5059 
5060  if (F.empty()) {
5061  // Use the input filename.
5062  F = llvm::sys::path::stem(Input.getBaseInput());
5063 
5064  // If we're compiling for an offload architecture (i.e. a CUDA device),
5065  // we need to make the file name for the device compilation different
5066  // from the host compilation.
5069  llvm::sys::path::replace_extension(F, "");
5071  Triple.normalize());
5072  F += "-";
5073  F += JA.getOffloadingArch();
5074  }
5075  }
5076 
5077  llvm::sys::path::replace_extension(F, "opt.yaml");
5078  CmdArgs.push_back(Args.MakeArgString(F));
5079  }
5080  if (const Arg *A =
5081  Args.getLastArg(options::OPT_foptimization_record_passes_EQ)) {
5082  CmdArgs.push_back("-opt-record-passes");
5083  CmdArgs.push_back(A->getValue());
5084  }
5085  }
5086 
5087  bool RewriteImports = Args.hasFlag(options::OPT_frewrite_imports,
5088  options::OPT_fno_rewrite_imports, false);
5089  if (RewriteImports)
5090  CmdArgs.push_back("-frewrite-imports");
5091 
5092  // Enable rewrite includes if the user's asked for it or if we're generating
5093  // diagnostics.
5094  // TODO: Once -module-dependency-dir works with -frewrite-includes it'd be
5095  // nice to enable this when doing a crashdump for modules as well.
5096  if (Args.hasFlag(options::OPT_frewrite_includes,
5097  options::OPT_fno_rewrite_includes, false) ||
5098  (C.isForDiagnostics() && !HaveModules))
5099  CmdArgs.push_back("-frewrite-includes");
5100 
5101  // Only allow -traditional or -traditional-cpp outside in preprocessing modes.
5102  if (Arg *A = Args.getLastArg(options::OPT_traditional,
5103  options::OPT_traditional_cpp)) {
5104  if (isa<PreprocessJobAction>(JA))
5105  CmdArgs.push_back("-traditional-cpp");
5106  else
5107  D.Diag(diag::err_drv_clang_unsupported) << A->getAsString(Args);
5108  }
5109 
5110  Args.AddLastArg(CmdArgs, options::OPT_dM);
5111  Args.AddLastArg(CmdArgs, options::OPT_dD);
5112 
5113  // Handle serialized diagnostics.
5114  if (Arg *A = Args.getLastArg(options::OPT__serialize_diags)) {
5115  CmdArgs.push_back("-serialize-diagnostic-file");
5116  CmdArgs.push_back(Args.MakeArgString(A->getValue()));
5117  }
5118 
5119  if (Args.hasArg(options::OPT_fretain_comments_from_system_headers))
5120  CmdArgs.push_back("-fretain-comments-from-system-headers");
5121 
5122  // Forward -fcomment-block-commands to -cc1.
5123  Args.AddAllArgs(CmdArgs, options::OPT_fcomment_block_commands);
5124  // Forward -fparse-all-comments to -cc1.
5125  Args.AddAllArgs(CmdArgs, options::OPT_fparse_all_comments);
5126 
5127  // Turn -fplugin=name.so into -load name.so
5128  for (const Arg *A : Args.filtered(options::OPT_fplugin_EQ)) {
5129  CmdArgs.push_back("-load");
5130  CmdArgs.push_back(A->getValue());
5131  A->claim();
5132  }
5133 
5134  // Forward -fpass-plugin=name.so to -cc1.
5135  for (const Arg *A : Args.filtered(options::OPT_fpass_plugin_EQ)) {
5136  CmdArgs.push_back(
5137  Args.MakeArgString(Twine("-fpass-plugin=") + A->getValue()));
5138  A->claim();
5139  }
5140 
5141  // Setup statistics file output.
5142  SmallString<128> StatsFile = getStatsFileName(Args, Output, Input, D);
5143  if (!StatsFile.empty())
5144  CmdArgs.push_back(Args.MakeArgString(Twine("-stats-file=") + StatsFile));
5145 
5146  // Forward -Xclang arguments to -cc1, and -mllvm arguments to the LLVM option
5147  // parser.
5148  // -finclude-default-header flag is for preprocessor,
5149  // do not pass it to other cc1 commands when save-temps is enabled
5150  if (C.getDriver().isSaveTempsEnabled() &&
5151  !isa<PreprocessJobAction>(JA)) {
5152  for (auto Arg : Args.filtered(options::OPT_Xclang)) {
5153  Arg->claim();
5154  if (StringRef(Arg->getValue()) != "-finclude-default-header")
5155  CmdArgs.push_back(Arg->getValue());
5156  }
5157  }
5158  else {
5159  Args.AddAllArgValues(CmdArgs, options::OPT_Xclang);
5160  }
5161  for (const Arg *A : Args.filtered(options::OPT_mllvm)) {
5162  A->claim();
5163 
5164  // We translate this by hand to the -cc1 argument, since nightly test uses
5165  // it and developers have been trained to spell it with -mllvm. Both
5166  // spellings are now deprecated and should be removed.
5167  if (StringRef(A->getValue(0)) == "-disable-llvm-optzns") {
5168  CmdArgs.push_back("-disable-llvm-optzns");
5169  } else {
5170  A->render(Args, CmdArgs);
5171  }
5172  }
5173 
5174  // With -save-temps, we want to save the unoptimized bitcode output from the
5175  // CompileJobAction, use -disable-llvm-passes to get pristine IR generated
5176  // by the frontend.
5177  // When -fembed-bitcode is enabled, optimized bitcode is emitted because it
5178  // has slightly different breakdown between stages.
5179  // FIXME: -fembed-bitcode -save-temps will save optimized bitcode instead of
5180  // pristine IR generated by the frontend. Ideally, a new compile action should
5181  // be added so both IR can be captured.
5182  if (C.getDriver().isSaveTempsEnabled() &&
5183  !(C.getDriver().embedBitcodeInObject() && !C.getDriver().isUsingLTO()) &&
5184  isa<CompileJobAction>(JA))
5185  CmdArgs.push_back("-disable-llvm-passes");
5186 
5187  if (Output.getType() == types::TY_Dependencies) {
5188  // Handled with other dependency code.
5189  } else if (Output.isFilename()) {
5190  CmdArgs.push_back("-o");
5191  CmdArgs.push_back(Output.getFilename());
5192  } else {
5193  assert(Output.isNothing() && "Invalid output.");
5194  }
5195 
5196  addDashXForInput(Args, Input, CmdArgs);
5197 
5198  ArrayRef<InputInfo> FrontendInputs = Input;
5199  if (IsHeaderModulePrecompile)
5200  FrontendInputs = ModuleHeaderInputs;
5201  else if (Input.isNothing())
5202  FrontendInputs = {};
5203 
5204  for (const InputInfo &Input : FrontendInputs) {
5205  if (Input.isFilename())
5206  CmdArgs.push_back(Input.getFilename());
5207  else
5208  Input.getInputArg().renderAsInput(Args, CmdArgs);
5209  }
5210 
5211  Args.AddAllArgs(CmdArgs, options::OPT_undef);
5212 
5213  const char *Exec = D.getClangProgramPath();
5214 
5215  // Optionally embed the -cc1 level arguments into the debug info or a
5216  // section, for build analysis.
5217  // Also record command line arguments into the debug info if
5218  // -grecord-gcc-switches options is set on.
5219  // By default, -gno-record-gcc-switches is set on and no recording.
5220  auto GRecordSwitches =
5221  Args.hasFlag(options::OPT_grecord_command_line,
5222  options::OPT_gno_record_command_line, false);
5223  auto FRecordSwitches =
5224  Args.hasFlag(options::OPT_frecord_command_line,
5225  options::OPT_fno_record_command_line, false);
5226  if (FRecordSwitches && !Triple.isOSBinFormatELF())
5227  D.Diag(diag::err_drv_unsupported_opt_for_target)
5228  << Args.getLastArg(options::OPT_frecord_command_line)->getAsString(Args)
5229  << TripleStr;
5230  if (TC.UseDwarfDebugFlags() || GRecordSwitches || FRecordSwitches) {
5231  ArgStringList OriginalArgs;
5232  for (const auto &Arg : Args)
5233  Arg->render(Args, OriginalArgs);
5234 
5235  SmallString<256> Flags;
5236  Flags += Exec;
5237  for (const char *OriginalArg : OriginalArgs) {
5238  SmallString<128> EscapedArg;
5239  EscapeSpacesAndBackslashes(OriginalArg, EscapedArg);
5240  Flags += " ";
5241  Flags += EscapedArg;
5242  }
5243  auto FlagsArgString = Args.MakeArgString(Flags);
5244  if (TC.UseDwarfDebugFlags() || GRecordSwitches) {
5245  CmdArgs.push_back("-dwarf-debug-flags");
5246  CmdArgs.push_back(FlagsArgString);
5247  }
5248  if (FRecordSwitches) {
5249  CmdArgs.push_back("-record-command-line");
5250  CmdArgs.push_back(FlagsArgString);
5251  }
5252  }
5253 
5254  // Host-side cuda compilation receives all device-side outputs in a single
5255  // fatbin as Inputs[1]. Include the binary with -fcuda-include-gpubinary.
5256  if ((IsCuda || IsHIP) && CudaDeviceInput) {
5257  CmdArgs.push_back("-fcuda-include-gpubinary");
5258  CmdArgs.push_back(CudaDeviceInput->getFilename());
5259  if (Args.hasFlag(options::OPT_fgpu_rdc, options::OPT_fno_gpu_rdc, false))
5260  CmdArgs.push_back("-fgpu-rdc");
5261  }
5262 
5263  if (IsCuda) {
5264  if (Args.hasFlag(options::OPT_fcuda_short_ptr,
5265  options::OPT_fno_cuda_short_ptr, false))
5266  CmdArgs.push_back("-fcuda-short-ptr");
5267  }
5268 
5269  // OpenMP offloading device jobs take the argument -fopenmp-host-ir-file-path
5270  // to specify the result of the compile phase on the host, so the meaningful
5271  // device declarations can be identified. Also, -fopenmp-is-device is passed
5272  // along to tell the frontend that it is generating code for a device, so that
5273  // only the relevant declarations are emitted.
5274  if (IsOpenMPDevice) {
5275  CmdArgs.push_back("-fopenmp-is-device");
5276  if (OpenMPDeviceInput) {
5277  CmdArgs.push_back("-fopenmp-host-ir-file-path");
5278  CmdArgs.push_back(Args.MakeArgString(OpenMPDeviceInput->getFilename()));
5279  }
5280  }
5281 
5282  // For all the host OpenMP offloading compile jobs we need to pass the targets
5283  // information using -fopenmp-targets= option.
5285  SmallString<128> TargetInfo("-fopenmp-targets=");
5286 
5287  Arg *Tgts = Args.getLastArg(options::OPT_fopenmp_targets_EQ);
5288  assert(Tgts && Tgts->getNumValues() &&
5289  "OpenMP offloading has to have targets specified.");
5290  for (unsigned i = 0; i < Tgts->getNumValues(); ++i) {
5291  if (i)
5292  TargetInfo += ',';
5293  // We need to get the string from the triple because it may be not exactly
5294  // the same as the one we get directly from the arguments.
5295  llvm::Triple T(Tgts->getValue(i));
5296  TargetInfo += T.getTriple();
5297  }
5298  CmdArgs.push_back(Args.MakeArgString(TargetInfo.str()));
5299  }
5300 
5301  bool WholeProgramVTables =
5302  Args.hasFlag(options::OPT_fwhole_program_vtables,
5303  options::OPT_fno_whole_program_vtables, false);
5304  if (WholeProgramVTables) {
5305  if (!D.isUsingLTO())
5306  D.Diag(diag::err_drv_argument_only_allowed_with)
5307  << "-fwhole-program-vtables"
5308  << "-flto";
5309  CmdArgs.push_back("-fwhole-program-vtables");
5310  }
5311 
5312  bool RequiresSplitLTOUnit = WholeProgramVTables || Sanitize.needsLTO();
5313  bool SplitLTOUnit =
5314  Args.hasFlag(options::OPT_fsplit_lto_unit,
5315  options::OPT_fno_split_lto_unit, RequiresSplitLTOUnit);
5316  if (RequiresSplitLTOUnit && !SplitLTOUnit)
5317  D.Diag(diag::err_drv_argument_not_allowed_with)
5318  << "-fno-split-lto-unit"
5319  << (WholeProgramVTables ? "-fwhole-program-vtables" : "-fsanitize=cfi");
5320  if (SplitLTOUnit)
5321  CmdArgs.push_back("-fsplit-lto-unit");
5322 
5323  if (Arg *A = Args.getLastArg(options::OPT_fexperimental_isel,
5324  options::OPT_fno_experimental_isel)) {
5325  CmdArgs.push_back("-mllvm");
5326  if (A->getOption().matches(options::OPT_fexperimental_isel)) {
5327  CmdArgs.push_back("-global-isel=1");
5328 
5329  // GISel is on by default on AArch64 -O0, so don't bother adding
5330  // the fallback remarks for it. Other combinations will add a warning of
5331  // some kind.
5332  bool IsArchSupported = Triple.getArch() == llvm::Triple::aarch64;
5333  bool IsOptLevelSupported = false;
5334 
5335  Arg *A = Args.getLastArg(options::OPT_O_Group);
5336  if (Triple.getArch() == llvm::Triple::aarch64) {
5337  if (!A || A->getOption().matches(options::OPT_O0))
5338  IsOptLevelSupported = true;
5339  }
5340  if (!IsArchSupported || !IsOptLevelSupported) {
5341  CmdArgs.push_back("-mllvm");
5342  CmdArgs.push_back("-global-isel-abort=2");
5343 
5344  if (!IsArchSupported)
5345  D.Diag(diag::warn_drv_experimental_isel_incomplete) << Triple.getArchName();
5346  else
5347  D.Diag(diag::warn_drv_experimental_isel_incomplete_opt);
5348  }
5349  } else {
5350  CmdArgs.push_back("-global-isel=0");
5351  }
5352  }
5353 
5354  if (Args.hasArg(options::OPT_forder_file_instrumentation)) {
5355  CmdArgs.push_back("-forder-file-instrumentation");
5356  // Enable order file instrumentation when ThinLTO is not on. When ThinLTO is
5357  // on, we need to pass these flags as linker flags and that will be handled
5358  // outside of the compiler.
5359  if (!D.isUsingLTO()) {
5360  CmdArgs.push_back("-mllvm");
5361  CmdArgs.push_back("-enable-order-file-instrumentation");
5362  }
5363  }
5364 
5365  if (Arg *A = Args.getLastArg(options::OPT_fforce_enable_int128,
5366  options::OPT_fno_force_enable_int128)) {
5367  if (A->getOption().matches(options::OPT_fforce_enable_int128))
5368  CmdArgs.push_back("-fforce-enable-int128");
5369  }
5370 
5371  if (Args.hasFlag(options::OPT_fcomplete_member_pointers,
5372  options::OPT_fno_complete_member_pointers, false))
5373  CmdArgs.push_back("-fcomplete-member-pointers");
5374 
5375  if (!Args.hasFlag(options::OPT_fcxx_static_destructors,
5376  options::OPT_fno_cxx_static_destructors, true))
5377  CmdArgs.push_back("-fno-c++-static-destructors");
5378 
5379  if (Arg *A = Args.getLastArg(options::OPT_moutline,
5380  options::OPT_mno_outline)) {
5381  if (A->getOption().matches(options::OPT_moutline)) {
5382  // We only support -moutline in AArch64 right now. If we're not compiling
5383  // for AArch64, emit a warning and ignore the flag. Otherwise, add the
5384  // proper mllvm flags.
5385  if (Triple.getArch() != llvm::Triple::aarch64) {
5386  D.Diag(diag::warn_drv_moutline_unsupported_opt) << Triple.getArchName();
5387  } else {
5388  CmdArgs.push_back("-mllvm");
5389  CmdArgs.push_back("-enable-machine-outliner");
5390  }
5391  } else {
5392  // Disable all outlining behaviour.
5393  CmdArgs.push_back("-mllvm");
5394  CmdArgs.push_back("-enable-machine-outliner=never");
5395  }
5396  }
5397 
5398  if (Args.hasFlag(options::OPT_faddrsig, options::OPT_fno_addrsig,
5399  (TC.getTriple().isOSBinFormatELF() ||
5400  TC.getTriple().isOSBinFormatCOFF()) &&
5401  !TC.getTriple().isPS4() &&
5402  !TC.getTriple().isOSNetBSD() &&
5403  !Distro(D.getVFS()).IsGentoo() &&
5404  !TC.getTriple().isAndroid() &&
5405  TC.useIntegratedAs()))
5406  CmdArgs.push_back("-faddrsig");
5407 
5408  // Finally add the compile command to the compilation.
5409  if (Args.hasArg(options::OPT__SLASH_fallback) &&
5410  Output.getType() == types::TY_Object &&
5411  (InputType == types::TY_C || InputType == types::TY_CXX)) {
5412  auto CLCommand =
5413  getCLFallback()->GetCommand(C, JA, Output, Inputs, Args, LinkingOutput);
5414  C.addCommand(llvm::make_unique<FallbackCommand>(
5415  JA, *this, Exec, CmdArgs, Inputs, std::move(CLCommand)));
5416  } else if (Args.hasArg(options::OPT__SLASH_fallback) &&
5417  isa<PrecompileJobAction>(JA)) {
5418  // In /fallback builds, run the main compilation even if the pch generation
5419  // fails, so that the main compilation's fallback to cl.exe runs.
5420  C.addCommand(llvm::make_unique<ForceSuccessCommand>(JA, *this, Exec,
5421  CmdArgs, Inputs));
5422  } else {
5423  C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
5424  }
5425 
5426  // Make the compile command echo its inputs for /showFilenames.
5427  if (Output.getType() == types::TY_Object &&
5428  Args.hasFlag(options::OPT__SLASH_showFilenames,
5429  options::OPT__SLASH_showFilenames_, false)) {
5430  C.getJobs().getJobs().back()->setPrintInputFilenames(true);
5431  }
5432 
5433  if (Arg *A = Args.getLastArg(options::OPT_pg))
5434  if (!shouldUseFramePointer(Args, Triple))
5435  D.Diag(diag::err_drv_argument_not_allowed_with) << "-fomit-frame-pointer"
5436  << A->getAsString(Args);
5437 
5438  // Claim some arguments which clang supports automatically.
5439 
5440  // -fpch-preprocess is used with gcc to add a special marker in the output to
5441  // include the PCH file.
5442  Args.ClaimAllArgs(options::OPT_fpch_preprocess);
5443 
5444  // Claim some arguments which clang doesn't support, but we don't
5445  // care to warn the user about.
5446  Args.ClaimAllArgs(options::OPT_clang_ignored_f_Group);
5447  Args.ClaimAllArgs(options::OPT_clang_ignored_m_Group);
5448 
5449  // Disable warnings for clang -E -emit-llvm foo.c
5450  Args.ClaimAllArgs(options::OPT_emit_llvm);
5451 }
5452 
5454  // CAUTION! The first constructor argument ("clang") is not arbitrary,
5455  // as it is for other tools. Some operations on a Tool actually test
5456  // whether that tool is Clang based on the Tool's Name as a string.
5457  : Tool("clang", "clang frontend", TC, RF_Full) {}
5458 
5460 
5461 /// Add options related to the Objective-C runtime/ABI.
5462 ///
5463 /// Returns true if the runtime is non-fragile.
5464 ObjCRuntime Clang::AddObjCRuntimeArgs(const ArgList &args,
5465  ArgStringList &cmdArgs,
5466  RewriteKind rewriteKind) const {
5467  // Look for the controlling runtime option.
5468  Arg *runtimeArg =
5469  args.getLastArg(options::OPT_fnext_runtime, options::OPT_fgnu_runtime,
5470  options::OPT_fobjc_runtime_EQ);
5471 
5472  // Just forward -fobjc-runtime= to the frontend. This supercedes
5473  // options about fragility.
5474  if (runtimeArg &&
5475  runtimeArg->getOption().matches(options::OPT_fobjc_runtime_EQ)) {
5476  ObjCRuntime runtime;
5477  StringRef value = runtimeArg->getValue();
5478  if (runtime.tryParse(value)) {
5479  getToolChain().getDriver().Diag(diag::err_drv_unknown_objc_runtime)
5480  << value;
5481  }
5482  if ((runtime.getKind() == ObjCRuntime::GNUstep) &&
5483  (runtime.getVersion() >= VersionTuple(2, 0)))
5484  if (!getToolChain().getTriple().isOSBinFormatELF() &&
5485  !getToolChain().getTriple().isOSBinFormatCOFF()) {
5487  diag::err_drv_gnustep_objc_runtime_incompatible_binary)
5488  << runtime.getVersion().getMajor();
5489  }
5490 
5491  runtimeArg->render(args, cmdArgs);
5492  return runtime;
5493  }
5494 
5495  // Otherwise, we'll need the ABI "version". Version numbers are
5496  // slightly confusing for historical reasons:
5497  // 1 - Traditional "fragile" ABI
5498  // 2 - Non-fragile ABI, version 1
5499  // 3 - Non-fragile ABI, version 2
5500  unsigned objcABIVersion = 1;
5501  // If -fobjc-abi-version= is present, use that to set the version.
5502  if (Arg *abiArg = args.getLastArg(options::OPT_fobjc_abi_version_EQ)) {
5503  StringRef value = abiArg->getValue();
5504  if (value == "1")
5505  objcABIVersion = 1;
5506  else if (value == "2")
5507  objcABIVersion = 2;
5508  else if (value == "3")
5509  objcABIVersion = 3;
5510  else
5511  getToolChain().getDriver().Diag(diag::err_drv_clang_unsupported) << value;
5512  } else {
5513  // Otherwise, determine if we are using the non-fragile ABI.
5514  bool nonFragileABIIsDefault =
5515  (rewriteKind == RK_NonFragile ||
5516  (rewriteKind == RK_None &&
5518  if (args.hasFlag(options::OPT_fobjc_nonfragile_abi,
5519  options::OPT_fno_objc_nonfragile_abi,
5520  nonFragileABIIsDefault)) {
5521 // Determine the non-fragile ABI version to use.
5522 #ifdef DISABLE_DEFAULT_NONFRAGILEABI_TWO
5523  unsigned nonFragileABIVersion = 1;
5524 #else
5525  unsigned nonFragileABIVersion = 2;
5526 #endif
5527 
5528  if (Arg *abiArg =
5529  args.getLastArg(options::OPT_fobjc_nonfragile_abi_version_EQ)) {
5530  StringRef value = abiArg->getValue();
5531  if (value == "1")
5532  nonFragileABIVersion = 1;
5533  else if (value == "2")
5534  nonFragileABIVersion = 2;
5535  else
5536  getToolChain().getDriver().Diag(diag::err_drv_clang_unsupported)
5537  << value;
5538  }
5539 
5540  objcABIVersion = 1 + nonFragileABIVersion;
5541  } else {
5542  objcABIVersion = 1;
5543  }
5544  }
5545 
5546  // We don't actually care about the ABI version other than whether
5547  // it's non-fragile.
5548  bool isNonFragile = objcABIVersion != 1;
5549 
5550  // If we have no runtime argument, ask the toolchain for its default runtime.
5551  // However, the rewriter only really supports the Mac runtime, so assume that.
5552  ObjCRuntime runtime;
5553  if (!runtimeArg) {
5554  switch (rewriteKind) {
5555  case RK_None:
5556  runtime = getToolChain().getDefaultObjCRuntime(isNonFragile);
5557  break;
5558  case RK_Fragile:
5559  runtime = ObjCRuntime(ObjCRuntime::FragileMacOSX, VersionTuple());
5560  break;
5561  case RK_NonFragile:
5562  runtime = ObjCRuntime(ObjCRuntime::MacOSX, VersionTuple());
5563  break;
5564  }
5565 
5566  // -fnext-runtime
5567  } else if (runtimeArg->getOption().matches(options::OPT_fnext_runtime)) {
5568  // On Darwin, make this use the default behavior for the toolchain.
5569  if (getToolChain().getTriple().isOSDarwin()) {
5570  runtime = getToolChain().getDefaultObjCRuntime(isNonFragile);
5571 
5572  // Otherwise, build for a generic macosx port.
5573  } else {
5574  runtime = ObjCRuntime(ObjCRuntime::MacOSX, VersionTuple());
5575  }
5576 
5577  // -fgnu-runtime
5578  } else {
5579  assert(runtimeArg->getOption().matches(options::OPT_fgnu_runtime));
5580  // Legacy behaviour is to target the gnustep runtime if we are in
5581  // non-fragile mode or the GCC runtime in fragile mode.
5582  if (isNonFragile)
5583  runtime = ObjCRuntime(ObjCRuntime::GNUstep, VersionTuple(2, 0));
5584  else
5585  runtime = ObjCRuntime(ObjCRuntime::GCC, VersionTuple());
5586  }
5587 
5588  cmdArgs.push_back(
5589  args.MakeArgString("-fobjc-runtime=" + runtime.getAsString()));
5590  return runtime;
5591 }
5592 
5593 static bool maybeConsumeDash(const std::string &EH, size_t &I) {
5594  bool HaveDash = (I + 1 < EH.size() && EH[I + 1] == '-');
5595  I += HaveDash;
5596  return !HaveDash;
5597 }
5598 
5599 namespace {
5600 struct EHFlags {
5601  bool Synch = false;
5602  bool Asynch = false;
5603  bool NoUnwindC = false;
5604 };
5605 } // end anonymous namespace
5606 
5607 /// /EH controls whether to run destructor cleanups when exceptions are
5608 /// thrown. There are three modifiers:
5609 /// - s: Cleanup after "synchronous" exceptions, aka C++ exceptions.
5610 /// - a: Cleanup after "asynchronous" exceptions, aka structured exceptions.
5611 /// The 'a' modifier is unimplemented and fundamentally hard in LLVM IR.
5612 /// - c: Assume that extern "C" functions are implicitly nounwind.
5613 /// The default is /EHs-c-, meaning cleanups are disabled.
5614 static EHFlags parseClangCLEHFlags(const Driver &D, const ArgList &Args) {
5615  EHFlags EH;
5616 
5617  std::vector<std::string> EHArgs =
5618  Args.getAllArgValues(options::OPT__SLASH_EH);
5619  for (auto EHVal : EHArgs) {
5620  for (size_t I = 0, E = EHVal.size(); I != E; ++I) {
5621  switch (EHVal[I]) {
5622  case 'a':
5623  EH.Asynch = maybeConsumeDash(EHVal, I);
5624  if (EH.Asynch)
5625  EH.Synch = false;
5626  continue;
5627  case 'c':
5628  EH.NoUnwindC = maybeConsumeDash(EHVal, I);
5629  continue;
5630  case 's':
5631  EH.Synch = maybeConsumeDash(EHVal, I);
5632  if (EH.Synch)
5633  EH.Asynch = false;
5634  continue;
5635  default:
5636  break;
5637  }
5638  D.Diag(clang::diag::err_drv_invalid_value) << "/EH" << EHVal;
5639  break;
5640  }
5641  }
5642  // The /GX, /GX- flags are only processed if there are not /EH flags.
5643  // The default is that /GX is not specified.
5644  if (EHArgs.empty() &&
5645  Args.hasFlag(options::OPT__SLASH_GX, options::OPT__SLASH_GX_,
5646  /*default=*/false)) {
5647  EH.Synch = true;
5648  EH.NoUnwindC = true;
5649  }
5650 
5651  return EH;
5652 }
5653 
5654 void Clang::AddClangCLArgs(const ArgList &Args, types::ID InputType,
5655  ArgStringList &CmdArgs,
5657  bool *EmitCodeView) const {
5658  unsigned RTOptionID = options::OPT__SLASH_MT;
5659 
5660  if (Args.hasArg(options::OPT__SLASH_LDd))
5661  // The /LDd option implies /MTd. The dependent lib part can be overridden,
5662  // but defining _DEBUG is sticky.
5663  RTOptionID = options::OPT__SLASH_MTd;
5664 
5665  if (Arg *A = Args.getLastArg(options::OPT__SLASH_M_Group))
5666  RTOptionID = A->getOption().getID();
5667 
5668  StringRef FlagForCRT;
5669  switch (RTOptionID) {
5670  case options::OPT__SLASH_MD:
5671  if (Args.hasArg(options::OPT__SLASH_LDd))
5672  CmdArgs.push_back("-D_DEBUG");
5673  CmdArgs.push_back("-D_MT");
5674  CmdArgs.push_back("-D_DLL");
5675  FlagForCRT = "--dependent-lib=msvcrt";
5676  break;
5677  case options::OPT__SLASH_MDd:
5678  CmdArgs.push_back("-D_DEBUG");
5679  CmdArgs.push_back("-D_MT");
5680  CmdArgs.push_back("-D_DLL");
5681  FlagForCRT = "--dependent-lib=msvcrtd";
5682  break;
5683  case options::OPT__SLASH_MT:
5684  if (Args.hasArg(options::OPT__SLASH_LDd))
5685  CmdArgs.push_back("-D_DEBUG");
5686  CmdArgs.push_back("-D_MT");
5687  CmdArgs.push_back("-flto-visibility-public-std");
5688  FlagForCRT = "--dependent-lib=libcmt";
5689  break;
5690  case options::OPT__SLASH_MTd:
5691  CmdArgs.push_back("-D_DEBUG");
5692  CmdArgs.push_back("-D_MT");
5693  CmdArgs.push_back("-flto-visibility-public-std");
5694  FlagForCRT = "--dependent-lib=libcmtd";
5695  break;
5696  default:
5697  llvm_unreachable("Unexpected option ID.");
5698  }
5699 
5700  if (Args.hasArg(options::OPT__SLASH_Zl)) {
5701  CmdArgs.push_back("-D_VC_NODEFAULTLIB");
5702  } else {
5703  CmdArgs.push_back(FlagForCRT.data());
5704 
5705  // This provides POSIX compatibility (maps 'open' to '_open'), which most
5706  // users want. The /Za flag to cl.exe turns this off, but it's not
5707  // implemented in clang.
5708  CmdArgs.push_back("--dependent-lib=oldnames");
5709  }
5710 
5711  if (Arg *A = Args.getLastArg(options::OPT_show_includes))
5712  A->render(Args, CmdArgs);
5713 
5714  // This controls whether or not we emit RTTI data for polymorphic types.
5715  if (Args.hasFlag(options::OPT__SLASH_GR_, options::OPT__SLASH_GR,
5716  /*default=*/false))
5717  CmdArgs.push_back("-fno-rtti-data");
5718 
5719  // This controls whether or not we emit stack-protector instrumentation.
5720  // In MSVC, Buffer Security Check (/GS) is on by default.
5721  if (Args.hasFlag(options::OPT__SLASH_GS, options::OPT__SLASH_GS_,
5722  /*default=*/true)) {
5723  CmdArgs.push_back("-stack-protector");
5724  CmdArgs.push_back(Args.MakeArgString(Twine(LangOptions::SSPStrong)));
5725  }
5726 
5727  // Emit CodeView if -Z7, -Zd, or -gline-tables-only are present.
5728  if (Arg *DebugInfoArg =
5729  Args.getLastArg(options::OPT__SLASH_Z7, options::OPT__SLASH_Zd,
5730  options::OPT_gline_tables_only)) {
5731  *EmitCodeView = true;
5732  if (DebugInfoArg->getOption().matches(options::OPT__SLASH_Z7))
5733  *DebugInfoKind = codegenoptions::LimitedDebugInfo;
5734  else
5735  *DebugInfoKind = codegenoptions::DebugLineTablesOnly;
5736  } else {
5737  *EmitCodeView = false;
5738  }
5739 
5740  const Driver &D = getToolChain().getDriver();
5741  EHFlags EH = parseClangCLEHFlags(D, Args);
5742  if (EH.Synch || EH.Asynch) {
5743  if (types::isCXX(InputType))
5744  CmdArgs.push_back("-fcxx-exceptions");
5745  CmdArgs.push_back("-fexceptions");
5746  }
5747  if (types::isCXX(InputType) && EH.Synch && EH.NoUnwindC)
5748  CmdArgs.push_back("-fexternc-nounwind");
5749 
5750  // /EP should expand to -E -P.
5751  if (Args.hasArg(options::OPT__SLASH_EP)) {
5752  CmdArgs.push_back("-E");
5753  CmdArgs.push_back("-P");
5754  }
5755 
5756  unsigned VolatileOptionID;
5757  if (getToolChain().getArch() == llvm::Triple::x86_64 ||
5758  getToolChain().getArch() == llvm::Triple::x86)
5759  VolatileOptionID = options::OPT__SLASH_volatile_ms;
5760  else
5761  VolatileOptionID = options::OPT__SLASH_volatile_iso;
5762 
5763  if (Arg *A = Args.getLastArg(options::OPT__SLASH_volatile_Group))
5764  VolatileOptionID = A->getOption().getID();
5765 
5766  if (VolatileOptionID == options::OPT__SLASH_volatile_ms)
5767  CmdArgs.push_back("-fms-volatile");
5768 
5769  if (Args.hasFlag(options::OPT__SLASH_Zc_dllexportInlines_,
5770  options::OPT__SLASH_Zc_dllexportInlines,
5771  false)) {
5772  if (Args.hasArg(options::OPT__SLASH_fallback)) {
5773  D.Diag(clang::diag::err_drv_dllexport_inlines_and_fallback);
5774  } else {
5775  CmdArgs.push_back("-fno-dllexport-inlines");
5776  }
5777  }
5778 
5779  Arg *MostGeneralArg = Args.getLastArg(options::OPT__SLASH_vmg);
5780  Arg *BestCaseArg = Args.getLastArg(options::OPT__SLASH_vmb);
5781  if (MostGeneralArg && BestCaseArg)
5782  D.Diag(clang::diag::err_drv_argument_not_allowed_with)
5783  << MostGeneralArg->getAsString(Args) << BestCaseArg->getAsString(Args);
5784 
5785  if (MostGeneralArg) {
5786  Arg *SingleArg = Args.getLastArg(options::OPT__SLASH_vms);
5787  Arg *MultipleArg = Args.getLastArg(options::OPT__SLASH_vmm);
5788  Arg *VirtualArg = Args.getLastArg(options::OPT__SLASH_vmv);
5789 
5790  Arg *FirstConflict = SingleArg ? SingleArg : MultipleArg;
5791  Arg *SecondConflict = VirtualArg ? VirtualArg : MultipleArg;
5792  if (FirstConflict && SecondConflict && FirstConflict != SecondConflict)
5793  D.Diag(clang::diag::err_drv_argument_not_allowed_with)
5794  << FirstConflict->getAsString(Args)
5795  << SecondConflict->getAsString(Args);
5796 
5797  if (SingleArg)
5798  CmdArgs.push_back("-fms-memptr-rep=single");
5799  else if (MultipleArg)
5800  CmdArgs.push_back("-fms-memptr-rep=multiple");
5801  else
5802  CmdArgs.push_back("-fms-memptr-rep=virtual");
5803  }
5804 
5805  // Parse the default calling convention options.
5806  if (Arg *CCArg =
5807  Args.getLastArg(options::OPT__SLASH_Gd, options::OPT__SLASH_Gr,
5808  options::OPT__SLASH_Gz, options::OPT__SLASH_Gv,
5809  options::OPT__SLASH_Gregcall)) {
5810  unsigned DCCOptId = CCArg->getOption().getID();
5811  const char *DCCFlag = nullptr;
5812  bool ArchSupported = true;
5813  llvm::Triple::ArchType Arch = getToolChain().getArch();
5814  switch (DCCOptId) {
5815  case options::OPT__SLASH_Gd:
5816  DCCFlag = "-fdefault-calling-conv=cdecl";
5817  break;
5818  case options::OPT__SLASH_Gr:
5819  ArchSupported = Arch == llvm::Triple::x86;
5820  DCCFlag = "-fdefault-calling-conv=fastcall";
5821  break;
5822  case options::OPT__SLASH_Gz:
5823  ArchSupported = Arch == llvm::Triple::x86;
5824  DCCFlag = "-fdefault-calling-conv=stdcall";
5825  break;
5826  case options::OPT__SLASH_Gv:
5827  ArchSupported = Arch == llvm::Triple::x86 || Arch == llvm::Triple::x86_64;
5828  DCCFlag = "-fdefault-calling-conv=vectorcall";
5829  break;
5830  case options::OPT__SLASH_Gregcall:
5831  ArchSupported = Arch == llvm::Triple::x86 || Arch == llvm::Triple::x86_64;
5832  DCCFlag = "-fdefault-calling-conv=regcall";
5833  break;
5834  }
5835 
5836  // MSVC doesn't warn if /Gr or /Gz is used on x64, so we don't either.
5837  if (ArchSupported && DCCFlag)
5838  CmdArgs.push_back(DCCFlag);
5839  }
5840 
5841  if (Arg *A = Args.getLastArg(options::OPT_vtordisp_mode_EQ))
5842  A->render(Args, CmdArgs);
5843 
5844  if (!Args.hasArg(options::OPT_fdiagnostics_format_EQ)) {
5845  CmdArgs.push_back("-fdiagnostics-format");
5846  if (Args.hasArg(options::OPT__SLASH_fallback))
5847  CmdArgs.push_back("msvc-fallback");
5848  else
5849  CmdArgs.push_back("msvc");
5850  }
5851 
5852  if (Arg *A = Args.getLastArg(options::OPT__SLASH_guard)) {
5853  SmallVector<StringRef, 1> SplitArgs;
5854  StringRef(A->getValue()).split(SplitArgs, ",");
5855  bool Instrument = false;
5856  bool NoChecks = false;
5857  for (StringRef Arg : SplitArgs) {
5858  if (Arg.equals_lower("cf"))
5859  Instrument = true;
5860  else if (Arg.equals_lower("cf-"))
5861  Instrument = false;
5862  else if (Arg.equals_lower("nochecks"))
5863  NoChecks = true;
5864  else if (Arg.equals_lower("nochecks-"))
5865  NoChecks = false;
5866  else
5867  D.Diag(diag::err_drv_invalid_value) << A->getSpelling() << Arg;
5868  }
5869  // Currently there's no support emitting CFG instrumentation; the flag only
5870  // emits the table of address-taken functions.
5871  if (Instrument || NoChecks)
5872  CmdArgs.push_back("-cfguard");
5873  }
5874 }
5875 
5876 visualstudio::Compiler *Clang::getCLFallback() const {
5877  if (!CLFallback)
5878  CLFallback.reset(new visualstudio::Compiler(getToolChain()));
5879  return CLFallback.get();
5880 }
5881 
5882 
5883 const char *Clang::getBaseInputName(const ArgList &Args,
5884  const InputInfo &Input) {
5885  return Args.MakeArgString(llvm::sys::path::filename(Input.getBaseInput()));
5886 }
5887 
5888 const char *Clang::getBaseInputStem(const ArgList &Args,
5889  const InputInfoList &Inputs) {
5890  const char *Str = getBaseInputName(Args, Inputs[0]);
5891 
5892  if (const char *End = strrchr(Str, '.'))
5893  return Args.MakeArgString(std::string(Str, End));
5894 
5895  return Str;
5896 }
5897 
5898 const char *Clang::getDependencyFileName(const ArgList &Args,
5899  const InputInfoList &Inputs) {
5900  // FIXME: Think about this more.
5901  std::string Res;
5902 
5903  if (Arg *OutputOpt = Args.getLastArg(options::OPT_o)) {
5904  std::string Str(OutputOpt->getValue());
5905  Res = Str.substr(0, Str.rfind('.'));
5906  } else {
5907  Res = getBaseInputStem(Args, Inputs);
5908  }
5909  return Args.MakeArgString(Res + ".d");
5910 }
5911 
5912 // Begin ClangAs
5913 
5914 void ClangAs::AddMIPSTargetArgs(const ArgList &Args,
5915  ArgStringList &CmdArgs) const {
5916  StringRef CPUName;
5917  StringRef ABIName;
5918  const llvm::Triple &Triple = getToolChain().getTriple();
5919  mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName);
5920 
5921  CmdArgs.push_back("-target-abi");
5922  CmdArgs.push_back(ABIName.data());
5923 }
5924 
5925 void ClangAs::AddX86TargetArgs(const ArgList &Args,
5926  ArgStringList &CmdArgs) const {
5927  if (Arg *A = Args.getLastArg(options::OPT_masm_EQ)) {
5928  StringRef Value = A->getValue();
5929  if (Value == "intel" || Value == "att") {
5930  CmdArgs.push_back("-mllvm");
5931  CmdArgs.push_back(Args.MakeArgString("-x86-asm-syntax=" + Value));
5932  } else {
5933  getToolChain().getDriver().Diag(diag::err_drv_unsupported_option_argument)
5934  << A->getOption().getName() << Value;
5935  }
5936  }
5937 }
5938 
5939 void ClangAs::AddRISCVTargetArgs(const ArgList &Args,
5940  ArgStringList &CmdArgs) const {
5941  const llvm::Triple &Triple = getToolChain().getTriple();
5942  StringRef ABIName = riscv::getRISCVABI(Args, Triple);
5943 
5944  CmdArgs.push_back("-target-abi");
5945  CmdArgs.push_back(ABIName.data());
5946 }
5947 
5949  const InputInfo &Output, const InputInfoList &Inputs,
5950  const ArgList &Args,
5951  const char *LinkingOutput) const {
5952  ArgStringList CmdArgs;
5953 
5954  assert(Inputs.size() == 1 && "Unexpected number of inputs.");
5955  const InputInfo &Input = Inputs[0];
5956 
5957  const llvm::Triple &Triple = getToolChain().getEffectiveTriple();
5958  const std::string &TripleStr = Triple.getTriple();
5959  const auto &D = getToolChain().getDriver();
5960 
5961  // Don't warn about "clang -w -c foo.s"
5962  Args.ClaimAllArgs(options::OPT_w);
5963  // and "clang -emit-llvm -c foo.s"
5964  Args.ClaimAllArgs(options::OPT_emit_llvm);
5965 
5966  claimNoWarnArgs(Args);
5967 
5968  // Invoke ourselves in -cc1as mode.
5969  //
5970  // FIXME: Implement custom jobs for internal actions.
5971  CmdArgs.push_back("-cc1as");
5972 
5973  // Add the "effective" target triple.
5974  CmdArgs.push_back("-triple");
5975  CmdArgs.push_back(Args.MakeArgString(TripleStr));
5976 
5977  // Set the output mode, we currently only expect to be used as a real
5978  // assembler.
5979  CmdArgs.push_back("-filetype");
5980  CmdArgs.push_back("obj");
5981 
5982  // Set the main file name, so that debug info works even with
5983  // -save-temps or preprocessed assembly.
5984  CmdArgs.push_back("-main-file-name");
5985  CmdArgs.push_back(Clang::getBaseInputName(Args, Input));
5986 
5987  // Add the target cpu
5988  std::string CPU = getCPUName(Args, Triple, /*FromAs*/ true);
5989  if (!CPU.empty()) {
5990  CmdArgs.push_back("-target-cpu");
5991  CmdArgs.push_back(Args.MakeArgString(CPU));
5992  }
5993 
5994  // Add the target features
5995  getTargetFeatures(getToolChain(), Triple, Args, CmdArgs, true);
5996 
5997  // Ignore explicit -force_cpusubtype_ALL option.
5998  (void)Args.hasArg(options::OPT_force__cpusubtype__ALL);
5999 
6000  // Pass along any -I options so we get proper .include search paths.
6001  Args.AddAllArgs(CmdArgs, options::OPT_I_Group);
6002 
6003  // Determine the original source input.
6004  const Action *SourceAction = &JA;
6005  while (SourceAction->getKind() != Action::InputClass) {
6006  assert(!SourceAction->getInputs().empty() && "unexpected root action!");
6007  SourceAction = SourceAction->getInputs()[0];
6008  }
6009 
6010  // Forward -g and handle debug info related flags, assuming we are dealing
6011  // with an actual assembly file.
6012  bool WantDebug = false;
6013  unsigned DwarfVersion = 0;
6014  Args.ClaimAllArgs(options::OPT_g_Group);
6015  if (Arg *A = Args.getLastArg(options::OPT_g_Group)) {
6016  WantDebug = !A->getOption().matches(options::OPT_g0) &&
6017  !A->getOption().matches(options::OPT_ggdb0);
6018  if (WantDebug)
6019  DwarfVersion = DwarfVersionNum(A->getSpelling());
6020  }
6021  if (DwarfVersion == 0)
6022  DwarfVersion = getToolChain().GetDefaultDwarfVersion();
6023 
6025 
6026  if (SourceAction->getType() == types::TY_Asm ||
6027  SourceAction->getType() == types::TY_PP_Asm) {
6028  // You might think that it would be ok to set DebugInfoKind outside of
6029  // the guard for source type, however there is a test which asserts
6030  // that some assembler invocation receives no -debug-info-kind,
6031  // and it's not clear whether that test is just overly restrictive.
6032  DebugInfoKind = (WantDebug ? codegenoptions::LimitedDebugInfo
6034  // Add the -fdebug-compilation-dir flag if needed.
6035  addDebugCompDirArg(Args, CmdArgs);
6036 
6037  addDebugPrefixMapArg(getToolChain().getDriver(), Args, CmdArgs);
6038 
6039  // Set the AT_producer to the clang version when using the integrated
6040  // assembler on assembly source files.
6041  CmdArgs.push_back("-dwarf-debug-producer");
6042  CmdArgs.push_back(Args.MakeArgString(getClangFullVersion()));
6043 
6044  // And pass along -I options
6045  Args.AddAllArgs(CmdArgs, options::OPT_I);
6046  }
6047  RenderDebugEnablingArgs(Args, CmdArgs, DebugInfoKind, DwarfVersion,
6048  llvm::DebuggerKind::Default);
6049  RenderDebugInfoCompressionArgs(Args, CmdArgs, D, getToolChain());
6050 
6051 
6052  // Handle -fPIC et al -- the relocation-model affects the assembler
6053  // for some targets.
6054  llvm::Reloc::Model RelocationModel;
6055  unsigned PICLevel;
6056  bool IsPIE;
6057  std::tie(RelocationModel, PICLevel, IsPIE) =
6058  ParsePICArgs(getToolChain(), Args);
6059 
6060  const char *RMName = RelocationModelName(RelocationModel);
6061  if (RMName) {
6062  CmdArgs.push_back("-mrelocation-model");
6063  CmdArgs.push_back(RMName);
6064  }
6065 
6066  // Optionally embed the -cc1as level arguments into the debug info, for build
6067  // analysis.
6068  if (getToolChain().UseDwarfDebugFlags()) {
6069  ArgStringList OriginalArgs;
6070  for (const auto &Arg : Args)
6071  Arg->render(Args, OriginalArgs);
6072 
6073  SmallString<256> Flags;
6074  const char *Exec = getToolChain().getDriver().getClangProgramPath();
6075  Flags += Exec;
6076  for (const char *OriginalArg : OriginalArgs) {
6077  SmallString<128> EscapedArg;
6078  EscapeSpacesAndBackslashes(OriginalArg, EscapedArg);
6079  Flags += " ";
6080  Flags += EscapedArg;
6081  }
6082  CmdArgs.push_back("-dwarf-debug-flags");
6083  CmdArgs.push_back(Args.MakeArgString(Flags));
6084  }
6085 
6086  // FIXME: Add -static support, once we have it.
6087 
6088  // Add target specific flags.
6089  switch (getToolChain().getArch()) {
6090  default:
6091  break;
6092 
6093  case llvm::Triple::mips:
6094  case llvm::Triple::mipsel:
6095  case llvm::Triple::mips64:
6096  case llvm::Triple::mips64el:
6097  AddMIPSTargetArgs(Args, CmdArgs);
6098  break;
6099 
6100  case llvm::Triple::x86:
6101  case llvm::Triple::x86_64:
6102  AddX86TargetArgs(Args, CmdArgs);
6103  break;
6104 
6105  case llvm::Triple::arm:
6106  case llvm::Triple::armeb:
6107  case llvm::Triple::thumb:
6108  case llvm::Triple::thumbeb:
6109  // This isn't in AddARMTargetArgs because we want to do this for assembly
6110  // only, not C/C++.
6111  if (Args.hasFlag(options::OPT_mdefault_build_attributes,
6112  options::OPT_mno_default_build_attributes, true)) {
6113  CmdArgs.push_back("-mllvm");
6114  CmdArgs.push_back("-arm-add-build-attributes");
6115  }
6116  break;
6117 
6118  case llvm::Triple::riscv32:
6119  case llvm::Triple::riscv64:
6120  AddRISCVTargetArgs(Args, CmdArgs);
6121  break;
6122  }
6123 
6124  // Consume all the warning flags. Usually this would be handled more
6125  // gracefully by -cc1 (warning about unknown warning flags, etc) but -cc1as
6126  // doesn't handle that so rather than warning about unused flags that are
6127  // actually used, we'll lie by omission instead.
6128  // FIXME: Stop lying and consume only the appropriate driver flags
6129  Args.ClaimAllArgs(options::OPT_W_Group);
6130 
6131  CollectArgsForIntegratedAssembler(C, Args, CmdArgs,
6132  getToolChain().getDriver());
6133 
6134  Args.AddAllArgs(CmdArgs, options::OPT_mllvm);
6135 
6136  assert(Output.isFilename() && "Unexpected lipo output.");
6137  CmdArgs.push_back("-o");
6138  CmdArgs.push_back(Output.getFilename());
6139 
6140  const llvm::Triple &T = getToolChain().getTriple();
6141  Arg *A;
6142  if (getDebugFissionKind(D, Args, A) == DwarfFissionKind::Split &&
6143  T.isOSBinFormatELF()) {
6144  CmdArgs.push_back("-split-dwarf-file");
6145  CmdArgs.push_back(SplitDebugName(Args, Input, Output));
6146  }
6147 
6148  assert(Input.isFilename() && "Invalid input.");
6149  CmdArgs.push_back(Input.getFilename());
6150 
6151  const char *Exec = getToolChain().getDriver().getClangProgramPath();
6152  C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
6153 }
6154 
6155 // Begin OffloadBundler
6156 
6158  const InputInfo &Output,
6159  const InputInfoList &Inputs,
6160  const llvm::opt::ArgList &TCArgs,
6161  const char *LinkingOutput) const {
6162  // The version with only one output is expected to refer to a bundling job.
6163  assert(isa<OffloadBundlingJobAction>(JA) && "Expecting bundling job!");
6164 
6165  // The bundling command looks like this:
6166  // clang-offload-bundler -type=bc
6167  // -targets=host-triple,openmp-triple1,openmp-triple2
6168  // -outputs=input_file
6169  // -inputs=unbundle_file_host,unbundle_file_tgt1,unbundle_file_tgt2"
6170 
6171  ArgStringList CmdArgs;
6172 
6173  // Get the type.
6174  CmdArgs.push_back(TCArgs.MakeArgString(
6175  Twine("-type=") + types::getTypeTempSuffix(Output.getType())));
6176 
6177  assert(JA.getInputs().size() == Inputs.size() &&
6178  "Not have inputs for all dependence actions??");
6179 
6180  // Get the targets.
6181  SmallString<128> Triples;
6182  Triples += "-targets=";
6183  for (unsigned I = 0; I < Inputs.size(); ++I) {
6184  if (I)
6185  Triples += ',';
6186 
6187  // Find ToolChain for this input.
6189  const ToolChain *CurTC = &getToolChain();
6190  const Action *CurDep = JA.getInputs()[I];
6191 
6192  if (const auto *OA = dyn_cast<OffloadAction>(CurDep)) {
6193  CurTC = nullptr;
6194  OA->doOnEachDependence([&](Action *A, const ToolChain *TC, const char *) {
6195  assert(CurTC == nullptr && "Expected one dependence!");
6196  CurKind = A->getOffloadingDeviceKind();
6197  CurTC = TC;
6198  });
6199  }
6200  Triples += Action::GetOffloadKindName(CurKind);
6201  Triples += '-';
6202  Triples += CurTC->getTriple().normalize();
6203  if (CurKind == Action::OFK_HIP && CurDep->getOffloadingArch()) {
6204  Triples += '-';
6205  Triples += CurDep->getOffloadingArch();
6206  }
6207  }
6208  CmdArgs.push_back(TCArgs.MakeArgString(Triples));
6209 
6210  // Get bundled file command.
6211  CmdArgs.push_back(
6212  TCArgs.MakeArgString(Twine("-outputs=") + Output.getFilename()));
6213 
6214  // Get unbundled files command.
6215  SmallString<128> UB;
6216  UB += "-inputs=";
6217  for (unsigned I = 0; I < Inputs.size(); ++I) {
6218  if (I)
6219  UB += ',';
6220 
6221  // Find ToolChain for this input.
6222  const ToolChain *CurTC = &getToolChain();
6223  if (const auto *OA = dyn_cast<OffloadAction>(JA.getInputs()[I])) {
6224  CurTC = nullptr;
6225  OA->doOnEachDependence([&](Action *, const ToolChain *TC, const char *) {
6226  assert(CurTC == nullptr && "Expected one dependence!");
6227  CurTC = TC;
6228  });
6229  }
6230  UB += CurTC->getInputFilename(Inputs[I]);
6231  }
6232  CmdArgs.push_back(TCArgs.MakeArgString(UB));
6233 
6234  // All the inputs are encoded as commands.
6235  C.addCommand(llvm::make_unique<Command>(
6236  JA, *this,
6237  TCArgs.MakeArgString(getToolChain().GetProgramPath(getShortName())),
6238  CmdArgs, None));
6239 }
6240 
6242  Compilation &C, const JobAction &JA, const InputInfoList &Outputs,
6243  const InputInfoList &Inputs, const llvm::opt::ArgList &TCArgs,
6244  const char *LinkingOutput) const {
6245  // The version with multiple outputs is expected to refer to a unbundling job.
6246  auto &UA = cast<OffloadUnbundlingJobAction>(JA);
6247 
6248  // The unbundling command looks like this:
6249  // clang-offload-bundler -type=bc
6250  // -targets=host-triple,openmp-triple1,openmp-triple2
6251  // -inputs=input_file
6252  // -outputs=unbundle_file_host,unbundle_file_tgt1,unbundle_file_tgt2"
6253  // -unbundle
6254 
6255  ArgStringList CmdArgs;
6256 
6257  assert(Inputs.size() == 1 && "Expecting to unbundle a single file!");
6258  InputInfo Input = Inputs.front();
6259 
6260  // Get the type.
6261  CmdArgs.push_back(TCArgs.MakeArgString(
6262  Twine("-type=") + types::getTypeTempSuffix(Input.getType())));
6263 
6264  // Get the targets.
6265  SmallString<128> Triples;
6266  Triples += "-targets=";
6267  auto DepInfo = UA.getDependentActionsInfo();
6268  for (unsigned I = 0; I < DepInfo.size(); ++I) {
6269  if (I)
6270  Triples += ',';
6271 
6272  auto &Dep = DepInfo[I];
6273  Triples += Action::GetOffloadKindName(Dep.DependentOffloadKind);
6274  Triples += '-';
6275  Triples += Dep.DependentToolChain->getTriple().normalize();
6276  if (Dep.DependentOffloadKind == Action::OFK_HIP &&
6277  !Dep.DependentBoundArch.empty()) {
6278  Triples += '-';
6279  Triples += Dep.DependentBoundArch;
6280  }
6281  }
6282 
6283  CmdArgs.push_back(TCArgs.MakeArgString(Triples));
6284 
6285  // Get bundled file command.
6286  CmdArgs.push_back(
6287  TCArgs.MakeArgString(Twine("-inputs=") + Input.getFilename()));
6288 
6289  // Get unbundled files command.
6290  SmallString<128> UB;
6291  UB += "-outputs=";
6292  for (unsigned I = 0; I < Outputs.size(); ++I) {
6293  if (I)
6294  UB += ',';
6295  UB += DepInfo[I].DependentToolChain->getInputFilename(Outputs[I]);
6296  }
6297  CmdArgs.push_back(TCArgs.MakeArgString(UB));
6298  CmdArgs.push_back("-unbundle");
6299 
6300  // All the inputs are encoded as commands.
6301  C.addCommand(llvm::make_unique<Command>(
6302  JA, *this,
6303  TCArgs.MakeArgString(getToolChain().GetProgramPath(getShortName())),
6304  CmdArgs, None));
6305 }
StringRef getSysRoot() const
Returns the sysroot path.
static void RenderCharacterOptions(const ArgList &Args, const llvm::Triple &T, ArgStringList &CmdArgs)
Definition: Clang.cpp:2870
void getAArch64TargetFeatures(const Driver &D, const llvm::Triple &Triple, const llvm::opt::ArgList &Args, std::vector< llvm::StringRef > &Features)
static const char * getBaseInputName(const llvm::opt::ArgList &Args, const InputInfo &Input)
Definition: Clang.cpp:5883
void handleTargetFeaturesGroup(const llvm::opt::ArgList &Args, std::vector< StringRef > &Features, llvm::opt::OptSpecifier Group)
void getRISCVTargetFeatures(const Driver &D, const llvm::opt::ArgList &Args, std::vector< llvm::StringRef > &Features)
static void getTargetFeatures(const ToolChain &TC, const llvm::Triple &Triple, const ArgList &Args, ArgStringList &CmdArgs, bool ForAS)
Definition: Clang.cpp:309
void ConstructJobMultipleOutputs(Compilation &C, const JobAction &JA, const InputInfoList &Outputs, const InputInfoList &Inputs, const llvm::opt::ArgList &TCArgs, const char *LinkingOutput) const override
Construct jobs to perform the action JA, writing to the Outputs and with Inputs, and add the jobs to ...
Definition: Clang.cpp:6241
static bool useFramePointerForTargetByDefault(const ArgList &Args, const llvm::Triple &Triple)
Definition: Clang.cpp:516
OpenMPRuntimeKind getOpenMPRuntime(const llvm::opt::ArgList &Args) const
Compute the desired OpenMP runtime from the flags provided.
Definition: Driver.cpp:567
static bool ShouldDisableAutolink(const ArgList &Args, const ToolChain &TC)
Definition: Clang.cpp:469
std::string getClangFullVersion()
Retrieves a string representing the complete clang version, which includes the clang version number...
Definition: Version.cpp:117
virtual ObjCRuntime getDefaultObjCRuntime(bool isNonFragile) const
getDefaultObjCRuntime - Return the default Objective-C runtime for this platform. ...
Definition: ToolChain.cpp:512
unsigned CCPrintHeaders
Set CC_PRINT_HEADERS mode, which causes the frontend to log header include information to CCPrintHead...
Definition: Driver.h:192
void addProfileRTArgs(const ToolChain &TC, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs)
const char * getTypeTempSuffix(ID Id, bool CLMode=false)
getTypeTempSuffix - Return the suffix to use when creating a temp file of this type, or null if unspecified.
Definition: Types.cpp:54
static void addExceptionArgs(const ArgList &Args, types::ID InputType, const ToolChain &TC, bool KernelOrKext, const ObjCRuntime &objcRuntime, ArgStringList &CmdArgs)
Adds exception related arguments to the driver command arguments.
Definition: Clang.cpp:414
bool isUseSeparateSections(const llvm::Triple &Triple)
Definition: CommonArgs.cpp:352
StringRef P
FloatABI getSparcFloatABI(const Driver &D, const llvm::opt::ArgList &Args)
bool isUsingLTO() const
Returns true if we are performing any kind of LTO.
Definition: Driver.h:525
Defines types useful for describing an Objective-C runtime.
virtual void AddClangCXXStdlibIncludeArgs(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const
AddClangCXXStdlibIncludeArgs - Add the clang -cc1 level arguments to set the include paths to use for...
Definition: ToolChain.cpp:785
input_range inputs()
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bool embedBitcodeEnabled() const
Definition: Driver.h:333
static void addDebugPrefixMapArg(const Driver &D, const ArgList &Args, ArgStringList &CmdArgs)
Add a CC1 and CC1AS option to specify the debug file path prefix map.
Definition: Clang.cpp:628
static void forAllAssociatedToolChains(Compilation &C, const JobAction &JA, const ToolChain &RegularToolChain, llvm::function_ref< void(const ToolChain &)> Work)
Apply Work on the current tool chain RegularToolChain and any other offloading tool chain that is ass...
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void getSystemZTargetFeatures(const llvm::opt::ArgList &Args, std::vector< llvm::StringRef > &Features)
void addArgs(const ToolChain &TC, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs, types::ID InputType) const
bool isHostOffloading(OffloadKind OKind) const
Check if this action have any offload kinds.
Definition: Action.h:201
static void CollectArgsForIntegratedAssembler(Compilation &C, const ArgList &Args, ArgStringList &CmdArgs, const Driver &D)
Definition: Clang.cpp:2024
LTOKind getLTOMode() const
Get the specific kind of LTO being performed.
Definition: Driver.h:528
DiagnosticBuilder Diag(unsigned DiagID) const
Definition: Driver.h:108
static void QuoteTarget(StringRef Target, SmallVectorImpl< char > &Res)
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static void CheckPreprocessingOptions(const Driver &D, const ArgList &Args)
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Definition: ObjCRuntime.h:52
static bool shouldUseFramePointer(const ArgList &Args, const llvm::Triple &Triple)
Definition: Clang.cpp:590
static bool UseRelaxAll(Compilation &C, const ArgList &Args)
Check if -relax-all should be passed to the internal assembler.
Definition: Clang.cpp:920
FloatABI getARMFloatABI(const ToolChain &TC, const llvm::opt::ArgList &Args)
static StringRef bytes(const std::vector< T, Allocator > &v)
Definition: ASTWriter.cpp:119
std::string getCPUName(const llvm::opt::ArgList &Args, const llvm::Triple &T, bool FromAs=false)
&#39;macosx-fragile&#39; is the Apple-provided NeXT-derived runtime on Mac OS X platforms that use the fragil...
Definition: ObjCRuntime.h:39
const char * getFilename() const
Definition: InputInfo.h:83