clang  9.0.0svn
Clang.cpp
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1 //===--- LLVM.cpp - Clang+LLVM ToolChain Implementations --------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "Clang.h"
11 #include "Arch/AArch64.h"
12 #include "Arch/ARM.h"
13 #include "Arch/Mips.h"
14 #include "Arch/PPC.h"
15 #include "Arch/RISCV.h"
16 #include "Arch/Sparc.h"
17 #include "Arch/SystemZ.h"
18 #include "Arch/X86.h"
19 #include "AMDGPU.h"
20 #include "CommonArgs.h"
21 #include "Hexagon.h"
22 #include "MSP430.h"
23 #include "InputInfo.h"
24 #include "PS4CPU.h"
25 #include "clang/Basic/CharInfo.h"
28 #include "clang/Basic/Version.h"
29 #include "clang/Driver/Distro.h"
31 #include "clang/Driver/Options.h"
33 #include "clang/Driver/XRayArgs.h"
34 #include "llvm/ADT/StringExtras.h"
35 #include "llvm/Config/llvm-config.h"
36 #include "llvm/Option/ArgList.h"
37 #include "llvm/Support/CodeGen.h"
38 #include "llvm/Support/Compression.h"
39 #include "llvm/Support/FileSystem.h"
40 #include "llvm/Support/Path.h"
41 #include "llvm/Support/Process.h"
42 #include "llvm/Support/TargetParser.h"
43 #include "llvm/Support/YAMLParser.h"
44 
45 #ifdef LLVM_ON_UNIX
46 #include <unistd.h> // For getuid().
47 #endif
48 
49 using namespace clang::driver;
50 using namespace clang::driver::tools;
51 using namespace clang;
52 using namespace llvm::opt;
53 
54 static void CheckPreprocessingOptions(const Driver &D, const ArgList &Args) {
55  if (Arg *A =
56  Args.getLastArg(clang::driver::options::OPT_C, options::OPT_CC)) {
57  if (!Args.hasArg(options::OPT_E) && !Args.hasArg(options::OPT__SLASH_P) &&
58  !Args.hasArg(options::OPT__SLASH_EP) && !D.CCCIsCPP()) {
59  D.Diag(clang::diag::err_drv_argument_only_allowed_with)
60  << A->getBaseArg().getAsString(Args)
61  << (D.IsCLMode() ? "/E, /P or /EP" : "-E");
62  }
63  }
64 }
65 
66 static void CheckCodeGenerationOptions(const Driver &D, const ArgList &Args) {
67  // In gcc, only ARM checks this, but it seems reasonable to check universally.
68  if (Args.hasArg(options::OPT_static))
69  if (const Arg *A =
70  Args.getLastArg(options::OPT_dynamic, options::OPT_mdynamic_no_pic))
71  D.Diag(diag::err_drv_argument_not_allowed_with) << A->getAsString(Args)
72  << "-static";
73 }
74 
75 // Add backslashes to escape spaces and other backslashes.
76 // This is used for the space-separated argument list specified with
77 // the -dwarf-debug-flags option.
78 static void EscapeSpacesAndBackslashes(const char *Arg,
79  SmallVectorImpl<char> &Res) {
80  for (; *Arg; ++Arg) {
81  switch (*Arg) {
82  default:
83  break;
84  case ' ':
85  case '\\':
86  Res.push_back('\\');
87  break;
88  }
89  Res.push_back(*Arg);
90  }
91 }
92 
93 // Quote target names for inclusion in GNU Make dependency files.
94 // Only the characters '$', '#', ' ', '\t' are quoted.
95 static void QuoteTarget(StringRef Target, SmallVectorImpl<char> &Res) {
96  for (unsigned i = 0, e = Target.size(); i != e; ++i) {
97  switch (Target[i]) {
98  case ' ':
99  case '\t':
100  // Escape the preceding backslashes
101  for (int j = i - 1; j >= 0 && Target[j] == '\\'; --j)
102  Res.push_back('\\');
103 
104  // Escape the space/tab
105  Res.push_back('\\');
106  break;
107  case '$':
108  Res.push_back('$');
109  break;
110  case '#':
111  Res.push_back('\\');
112  break;
113  default:
114  break;
115  }
116 
117  Res.push_back(Target[i]);
118  }
119 }
120 
121 /// Apply \a Work on the current tool chain \a RegularToolChain and any other
122 /// offloading tool chain that is associated with the current action \a JA.
123 static void
125  const ToolChain &RegularToolChain,
126  llvm::function_ref<void(const ToolChain &)> Work) {
127  // Apply Work on the current/regular tool chain.
128  Work(RegularToolChain);
129 
130  // Apply Work on all the offloading tool chains associated with the current
131  // action.
136  else if (JA.isHostOffloading(Action::OFK_HIP))
138  else if (JA.isDeviceOffloading(Action::OFK_HIP))
140 
143  for (auto II = TCs.first, IE = TCs.second; II != IE; ++II)
144  Work(*II->second);
145  } else if (JA.isDeviceOffloading(Action::OFK_OpenMP))
147 
148  //
149  // TODO: Add support for other offloading programming models here.
150  //
151 }
152 
153 /// This is a helper function for validating the optional refinement step
154 /// parameter in reciprocal argument strings. Return false if there is an error
155 /// parsing the refinement step. Otherwise, return true and set the Position
156 /// of the refinement step in the input string.
157 static bool getRefinementStep(StringRef In, const Driver &D,
158  const Arg &A, size_t &Position) {
159  const char RefinementStepToken = ':';
160  Position = In.find(RefinementStepToken);
161  if (Position != StringRef::npos) {
162  StringRef Option = A.getOption().getName();
163  StringRef RefStep = In.substr(Position + 1);
164  // Allow exactly one numeric character for the additional refinement
165  // step parameter. This is reasonable for all currently-supported
166  // operations and architectures because we would expect that a larger value
167  // of refinement steps would cause the estimate "optimization" to
168  // under-perform the native operation. Also, if the estimate does not
169  // converge quickly, it probably will not ever converge, so further
170  // refinement steps will not produce a better answer.
171  if (RefStep.size() != 1) {
172  D.Diag(diag::err_drv_invalid_value) << Option << RefStep;
173  return false;
174  }
175  char RefStepChar = RefStep[0];
176  if (RefStepChar < '0' || RefStepChar > '9') {
177  D.Diag(diag::err_drv_invalid_value) << Option << RefStep;
178  return false;
179  }
180  }
181  return true;
182 }
183 
184 /// The -mrecip flag requires processing of many optional parameters.
185 static void ParseMRecip(const Driver &D, const ArgList &Args,
186  ArgStringList &OutStrings) {
187  StringRef DisabledPrefixIn = "!";
188  StringRef DisabledPrefixOut = "!";
189  StringRef EnabledPrefixOut = "";
190  StringRef Out = "-mrecip=";
191 
192  Arg *A = Args.getLastArg(options::OPT_mrecip, options::OPT_mrecip_EQ);
193  if (!A)
194  return;
195 
196  unsigned NumOptions = A->getNumValues();
197  if (NumOptions == 0) {
198  // No option is the same as "all".
199  OutStrings.push_back(Args.MakeArgString(Out + "all"));
200  return;
201  }
202 
203  // Pass through "all", "none", or "default" with an optional refinement step.
204  if (NumOptions == 1) {
205  StringRef Val = A->getValue(0);
206  size_t RefStepLoc;
207  if (!getRefinementStep(Val, D, *A, RefStepLoc))
208  return;
209  StringRef ValBase = Val.slice(0, RefStepLoc);
210  if (ValBase == "all" || ValBase == "none" || ValBase == "default") {
211  OutStrings.push_back(Args.MakeArgString(Out + Val));
212  return;
213  }
214  }
215 
216  // Each reciprocal type may be enabled or disabled individually.
217  // Check each input value for validity, concatenate them all back together,
218  // and pass through.
219 
220  llvm::StringMap<bool> OptionStrings;
221  OptionStrings.insert(std::make_pair("divd", false));
222  OptionStrings.insert(std::make_pair("divf", false));
223  OptionStrings.insert(std::make_pair("vec-divd", false));
224  OptionStrings.insert(std::make_pair("vec-divf", false));
225  OptionStrings.insert(std::make_pair("sqrtd", false));
226  OptionStrings.insert(std::make_pair("sqrtf", false));
227  OptionStrings.insert(std::make_pair("vec-sqrtd", false));
228  OptionStrings.insert(std::make_pair("vec-sqrtf", false));
229 
230  for (unsigned i = 0; i != NumOptions; ++i) {
231  StringRef Val = A->getValue(i);
232 
233  bool IsDisabled = Val.startswith(DisabledPrefixIn);
234  // Ignore the disablement token for string matching.
235  if (IsDisabled)
236  Val = Val.substr(1);
237 
238  size_t RefStep;
239  if (!getRefinementStep(Val, D, *A, RefStep))
240  return;
241 
242  StringRef ValBase = Val.slice(0, RefStep);
243  llvm::StringMap<bool>::iterator OptionIter = OptionStrings.find(ValBase);
244  if (OptionIter == OptionStrings.end()) {
245  // Try again specifying float suffix.
246  OptionIter = OptionStrings.find(ValBase.str() + 'f');
247  if (OptionIter == OptionStrings.end()) {
248  // The input name did not match any known option string.
249  D.Diag(diag::err_drv_unknown_argument) << Val;
250  return;
251  }
252  // The option was specified without a float or double suffix.
253  // Make sure that the double entry was not already specified.
254  // The float entry will be checked below.
255  if (OptionStrings[ValBase.str() + 'd']) {
256  D.Diag(diag::err_drv_invalid_value) << A->getOption().getName() << Val;
257  return;
258  }
259  }
260 
261  if (OptionIter->second == true) {
262  // Duplicate option specified.
263  D.Diag(diag::err_drv_invalid_value) << A->getOption().getName() << Val;
264  return;
265  }
266 
267  // Mark the matched option as found. Do not allow duplicate specifiers.
268  OptionIter->second = true;
269 
270  // If the precision was not specified, also mark the double entry as found.
271  if (ValBase.back() != 'f' && ValBase.back() != 'd')
272  OptionStrings[ValBase.str() + 'd'] = true;
273 
274  // Build the output string.
275  StringRef Prefix = IsDisabled ? DisabledPrefixOut : EnabledPrefixOut;
276  Out = Args.MakeArgString(Out + Prefix + Val);
277  if (i != NumOptions - 1)
278  Out = Args.MakeArgString(Out + ",");
279  }
280 
281  OutStrings.push_back(Args.MakeArgString(Out));
282 }
283 
284 /// The -mprefer-vector-width option accepts either a positive integer
285 /// or the string "none".
286 static void ParseMPreferVectorWidth(const Driver &D, const ArgList &Args,
287  ArgStringList &CmdArgs) {
288  Arg *A = Args.getLastArg(options::OPT_mprefer_vector_width_EQ);
289  if (!A)
290  return;
291 
292  StringRef Value = A->getValue();
293  if (Value == "none") {
294  CmdArgs.push_back("-mprefer-vector-width=none");
295  } else {
296  unsigned Width;
297  if (Value.getAsInteger(10, Width)) {
298  D.Diag(diag::err_drv_invalid_value) << A->getOption().getName() << Value;
299  return;
300  }
301  CmdArgs.push_back(Args.MakeArgString("-mprefer-vector-width=" + Value));
302  }
303 }
304 
305 static void getWebAssemblyTargetFeatures(const ArgList &Args,
306  std::vector<StringRef> &Features) {
307  handleTargetFeaturesGroup(Args, Features, options::OPT_m_wasm_Features_Group);
308 }
309 
310 static void getTargetFeatures(const ToolChain &TC, const llvm::Triple &Triple,
311  const ArgList &Args, ArgStringList &CmdArgs,
312  bool ForAS) {
313  const Driver &D = TC.getDriver();
314  std::vector<StringRef> Features;
315  switch (Triple.getArch()) {
316  default:
317  break;
318  case llvm::Triple::mips:
319  case llvm::Triple::mipsel:
320  case llvm::Triple::mips64:
321  case llvm::Triple::mips64el:
322  mips::getMIPSTargetFeatures(D, Triple, Args, Features);
323  break;
324 
325  case llvm::Triple::arm:
326  case llvm::Triple::armeb:
327  case llvm::Triple::thumb:
328  case llvm::Triple::thumbeb:
329  arm::getARMTargetFeatures(TC, Triple, Args, CmdArgs, Features, ForAS);
330  break;
331 
332  case llvm::Triple::ppc:
333  case llvm::Triple::ppc64:
334  case llvm::Triple::ppc64le:
335  ppc::getPPCTargetFeatures(D, Triple, Args, Features);
336  break;
337  case llvm::Triple::riscv32:
338  case llvm::Triple::riscv64:
339  riscv::getRISCVTargetFeatures(D, Args, Features);
340  break;
341  case llvm::Triple::systemz:
342  systemz::getSystemZTargetFeatures(Args, Features);
343  break;
344  case llvm::Triple::aarch64:
345  case llvm::Triple::aarch64_be:
346  aarch64::getAArch64TargetFeatures(D, Triple, Args, Features);
347  break;
348  case llvm::Triple::x86:
349  case llvm::Triple::x86_64:
350  x86::getX86TargetFeatures(D, Triple, Args, Features);
351  break;
352  case llvm::Triple::hexagon:
353  hexagon::getHexagonTargetFeatures(D, Args, Features);
354  break;
355  case llvm::Triple::wasm32:
356  case llvm::Triple::wasm64:
357  getWebAssemblyTargetFeatures(Args, Features);
358  break;
359  case llvm::Triple::sparc:
360  case llvm::Triple::sparcel:
361  case llvm::Triple::sparcv9:
362  sparc::getSparcTargetFeatures(D, Args, Features);
363  break;
364  case llvm::Triple::r600:
365  case llvm::Triple::amdgcn:
366  amdgpu::getAMDGPUTargetFeatures(D, Args, Features);
367  break;
368  case llvm::Triple::msp430:
369  msp430::getMSP430TargetFeatures(D, Args, Features);
370  }
371 
372  // Find the last of each feature.
373  llvm::StringMap<unsigned> LastOpt;
374  for (unsigned I = 0, N = Features.size(); I < N; ++I) {
375  StringRef Name = Features[I];
376  assert(Name[0] == '-' || Name[0] == '+');
377  LastOpt[Name.drop_front(1)] = I;
378  }
379 
380  for (unsigned I = 0, N = Features.size(); I < N; ++I) {
381  // If this feature was overridden, ignore it.
382  StringRef Name = Features[I];
383  llvm::StringMap<unsigned>::iterator LastI = LastOpt.find(Name.drop_front(1));
384  assert(LastI != LastOpt.end());
385  unsigned Last = LastI->second;
386  if (Last != I)
387  continue;
388 
389  CmdArgs.push_back("-target-feature");
390  CmdArgs.push_back(Name.data());
391  }
392 }
393 
394 static bool
396  const llvm::Triple &Triple) {
397  // We use the zero-cost exception tables for Objective-C if the non-fragile
398  // ABI is enabled or when compiling for x86_64 and ARM on Snow Leopard and
399  // later.
400  if (runtime.isNonFragile())
401  return true;
402 
403  if (!Triple.isMacOSX())
404  return false;
405 
406  return (!Triple.isMacOSXVersionLT(10, 5) &&
407  (Triple.getArch() == llvm::Triple::x86_64 ||
408  Triple.getArch() == llvm::Triple::arm));
409 }
410 
411 /// Adds exception related arguments to the driver command arguments. There's a
412 /// master flag, -fexceptions and also language specific flags to enable/disable
413 /// C++ and Objective-C exceptions. This makes it possible to for example
414 /// disable C++ exceptions but enable Objective-C exceptions.
415 static void addExceptionArgs(const ArgList &Args, types::ID InputType,
416  const ToolChain &TC, bool KernelOrKext,
417  const ObjCRuntime &objcRuntime,
418  ArgStringList &CmdArgs) {
419  const llvm::Triple &Triple = TC.getTriple();
420 
421  if (KernelOrKext) {
422  // -mkernel and -fapple-kext imply no exceptions, so claim exception related
423  // arguments now to avoid warnings about unused arguments.
424  Args.ClaimAllArgs(options::OPT_fexceptions);
425  Args.ClaimAllArgs(options::OPT_fno_exceptions);
426  Args.ClaimAllArgs(options::OPT_fobjc_exceptions);
427  Args.ClaimAllArgs(options::OPT_fno_objc_exceptions);
428  Args.ClaimAllArgs(options::OPT_fcxx_exceptions);
429  Args.ClaimAllArgs(options::OPT_fno_cxx_exceptions);
430  return;
431  }
432 
433  // See if the user explicitly enabled exceptions.
434  bool EH = Args.hasFlag(options::OPT_fexceptions, options::OPT_fno_exceptions,
435  false);
436 
437  // Obj-C exceptions are enabled by default, regardless of -fexceptions. This
438  // is not necessarily sensible, but follows GCC.
439  if (types::isObjC(InputType) &&
440  Args.hasFlag(options::OPT_fobjc_exceptions,
441  options::OPT_fno_objc_exceptions, true)) {
442  CmdArgs.push_back("-fobjc-exceptions");
443 
444  EH |= shouldUseExceptionTablesForObjCExceptions(objcRuntime, Triple);
445  }
446 
447  if (types::isCXX(InputType)) {
448  // Disable C++ EH by default on XCore and PS4.
449  bool CXXExceptionsEnabled =
450  Triple.getArch() != llvm::Triple::xcore && !Triple.isPS4CPU();
451  Arg *ExceptionArg = Args.getLastArg(
452  options::OPT_fcxx_exceptions, options::OPT_fno_cxx_exceptions,
453  options::OPT_fexceptions, options::OPT_fno_exceptions);
454  if (ExceptionArg)
455  CXXExceptionsEnabled =
456  ExceptionArg->getOption().matches(options::OPT_fcxx_exceptions) ||
457  ExceptionArg->getOption().matches(options::OPT_fexceptions);
458 
459  if (CXXExceptionsEnabled) {
460  CmdArgs.push_back("-fcxx-exceptions");
461 
462  EH = true;
463  }
464  }
465 
466  if (EH)
467  CmdArgs.push_back("-fexceptions");
468 }
469 
470 static bool ShouldDisableAutolink(const ArgList &Args, const ToolChain &TC) {
471  bool Default = true;
472  if (TC.getTriple().isOSDarwin()) {
473  // The native darwin assembler doesn't support the linker_option directives,
474  // so we disable them if we think the .s file will be passed to it.
475  Default = TC.useIntegratedAs();
476  }
477  return !Args.hasFlag(options::OPT_fautolink, options::OPT_fno_autolink,
478  Default);
479 }
480 
481 static bool ShouldDisableDwarfDirectory(const ArgList &Args,
482  const ToolChain &TC) {
483  bool UseDwarfDirectory =
484  Args.hasFlag(options::OPT_fdwarf_directory_asm,
485  options::OPT_fno_dwarf_directory_asm, TC.useIntegratedAs());
486  return !UseDwarfDirectory;
487 }
488 
489 // Convert an arg of the form "-gN" or "-ggdbN" or one of their aliases
490 // to the corresponding DebugInfoKind.
492  assert(A.getOption().matches(options::OPT_gN_Group) &&
493  "Not a -g option that specifies a debug-info level");
494  if (A.getOption().matches(options::OPT_g0) ||
495  A.getOption().matches(options::OPT_ggdb0))
497  if (A.getOption().matches(options::OPT_gline_tables_only) ||
498  A.getOption().matches(options::OPT_ggdb1))
500  if (A.getOption().matches(options::OPT_gline_directives_only))
503 }
504 
505 static bool mustUseNonLeafFramePointerForTarget(const llvm::Triple &Triple) {
506  switch (Triple.getArch()){
507  default:
508  return false;
509  case llvm::Triple::arm:
510  case llvm::Triple::thumb:
511  // ARM Darwin targets require a frame pointer to be always present to aid
512  // offline debugging via backtraces.
513  return Triple.isOSDarwin();
514  }
515 }
516 
517 static bool useFramePointerForTargetByDefault(const ArgList &Args,
518  const llvm::Triple &Triple) {
519  switch (Triple.getArch()) {
520  case llvm::Triple::xcore:
521  case llvm::Triple::wasm32:
522  case llvm::Triple::wasm64:
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.isOSLinux() || Triple.getOS() == llvm::Triple::CloudABI ||
538  Triple.isOSHurd()) {
539  switch (Triple.getArch()) {
540  // Don't use a frame pointer on linux if optimizing for certain targets.
541  case llvm::Triple::mips64:
542  case llvm::Triple::mips64el:
543  case llvm::Triple::mips:
544  case llvm::Triple::mipsel:
545  case llvm::Triple::ppc:
546  case llvm::Triple::ppc64:
547  case llvm::Triple::ppc64le:
548  case llvm::Triple::systemz:
549  case llvm::Triple::x86:
550  case llvm::Triple::x86_64:
551  return !areOptimizationsEnabled(Args);
552  default:
553  return true;
554  }
555  }
556 
557  if (Triple.isOSWindows()) {
558  switch (Triple.getArch()) {
559  case llvm::Triple::x86:
560  return !areOptimizationsEnabled(Args);
561  case llvm::Triple::x86_64:
562  return Triple.isOSBinFormatMachO();
563  case llvm::Triple::arm:
564  case llvm::Triple::thumb:
565  // Windows on ARM builds with FPO disabled to aid fast stack walking
566  return true;
567  default:
568  // All other supported Windows ISAs use xdata unwind information, so frame
569  // pointers are not generally useful.
570  return false;
571  }
572  }
573 
574  return true;
575 }
576 
577 static bool shouldUseFramePointer(const ArgList &Args,
578  const llvm::Triple &Triple) {
579  if (Arg *A = Args.getLastArg(options::OPT_fno_omit_frame_pointer,
580  options::OPT_fomit_frame_pointer))
581  return A->getOption().matches(options::OPT_fno_omit_frame_pointer) ||
583 
584  if (Args.hasArg(options::OPT_pg))
585  return true;
586 
587  return useFramePointerForTargetByDefault(Args, Triple);
588 }
589 
590 static bool shouldUseLeafFramePointer(const ArgList &Args,
591  const llvm::Triple &Triple) {
592  if (Arg *A = Args.getLastArg(options::OPT_mno_omit_leaf_frame_pointer,
593  options::OPT_momit_leaf_frame_pointer))
594  return A->getOption().matches(options::OPT_mno_omit_leaf_frame_pointer);
595 
596  if (Args.hasArg(options::OPT_pg))
597  return true;
598 
599  if (Triple.isPS4CPU())
600  return false;
601 
602  return useFramePointerForTargetByDefault(Args, Triple);
603 }
604 
605 /// Add a CC1 option to specify the debug compilation directory.
606 static void addDebugCompDirArg(const ArgList &Args, ArgStringList &CmdArgs) {
607  SmallString<128> cwd;
608  if (!llvm::sys::fs::current_path(cwd)) {
609  CmdArgs.push_back("-fdebug-compilation-dir");
610  CmdArgs.push_back(Args.MakeArgString(cwd));
611  }
612 }
613 
614 /// Add a CC1 and CC1AS option to specify the debug file path prefix map.
615 static void addDebugPrefixMapArg(const Driver &D, const ArgList &Args, ArgStringList &CmdArgs) {
616  for (const Arg *A : Args.filtered(options::OPT_fdebug_prefix_map_EQ)) {
617  StringRef Map = A->getValue();
618  if (Map.find('=') == StringRef::npos)
619  D.Diag(diag::err_drv_invalid_argument_to_fdebug_prefix_map) << Map;
620  else
621  CmdArgs.push_back(Args.MakeArgString("-fdebug-prefix-map=" + Map));
622  A->claim();
623  }
624 }
625 
626 /// Vectorize at all optimization levels greater than 1 except for -Oz.
627 /// For -Oz the loop vectorizer is disable, while the slp vectorizer is enabled.
628 static bool shouldEnableVectorizerAtOLevel(const ArgList &Args, bool isSlpVec) {
629  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
630  if (A->getOption().matches(options::OPT_O4) ||
631  A->getOption().matches(options::OPT_Ofast))
632  return true;
633 
634  if (A->getOption().matches(options::OPT_O0))
635  return false;
636 
637  assert(A->getOption().matches(options::OPT_O) && "Must have a -O flag");
638 
639  // Vectorize -Os.
640  StringRef S(A->getValue());
641  if (S == "s")
642  return true;
643 
644  // Don't vectorize -Oz, unless it's the slp vectorizer.
645  if (S == "z")
646  return isSlpVec;
647 
648  unsigned OptLevel = 0;
649  if (S.getAsInteger(10, OptLevel))
650  return false;
651 
652  return OptLevel > 1;
653  }
654 
655  return false;
656 }
657 
658 /// Add -x lang to \p CmdArgs for \p Input.
659 static void addDashXForInput(const ArgList &Args, const InputInfo &Input,
660  ArgStringList &CmdArgs) {
661  // When using -verify-pch, we don't want to provide the type
662  // 'precompiled-header' if it was inferred from the file extension
663  if (Args.hasArg(options::OPT_verify_pch) && Input.getType() == types::TY_PCH)
664  return;
665 
666  CmdArgs.push_back("-x");
667  if (Args.hasArg(options::OPT_rewrite_objc))
668  CmdArgs.push_back(types::getTypeName(types::TY_PP_ObjCXX));
669  else {
670  // Map the driver type to the frontend type. This is mostly an identity
671  // mapping, except that the distinction between module interface units
672  // and other source files does not exist at the frontend layer.
673  const char *ClangType;
674  switch (Input.getType()) {
675  case types::TY_CXXModule:
676  ClangType = "c++";
677  break;
678  case types::TY_PP_CXXModule:
679  ClangType = "c++-cpp-output";
680  break;
681  default:
682  ClangType = types::getTypeName(Input.getType());
683  break;
684  }
685  CmdArgs.push_back(ClangType);
686  }
687 }
688 
690 #ifdef LLVM_ON_UNIX
691  const char *Username = getenv("LOGNAME");
692 #else
693  const char *Username = getenv("USERNAME");
694 #endif
695  if (Username) {
696  // Validate that LoginName can be used in a path, and get its length.
697  size_t Len = 0;
698  for (const char *P = Username; *P; ++P, ++Len) {
699  if (!clang::isAlphanumeric(*P) && *P != '_') {
700  Username = nullptr;
701  break;
702  }
703  }
704 
705  if (Username && Len > 0) {
706  Result.append(Username, Username + Len);
707  return;
708  }
709  }
710 
711 // Fallback to user id.
712 #ifdef LLVM_ON_UNIX
713  std::string UID = llvm::utostr(getuid());
714 #else
715  // FIXME: Windows seems to have an 'SID' that might work.
716  std::string UID = "9999";
717 #endif
718  Result.append(UID.begin(), UID.end());
719 }
720 
721 static void addPGOAndCoverageFlags(Compilation &C, const Driver &D,
722  const InputInfo &Output, const ArgList &Args,
723  ArgStringList &CmdArgs) {
724 
725  auto *PGOGenerateArg = Args.getLastArg(options::OPT_fprofile_generate,
726  options::OPT_fprofile_generate_EQ,
727  options::OPT_fno_profile_generate);
728  if (PGOGenerateArg &&
729  PGOGenerateArg->getOption().matches(options::OPT_fno_profile_generate))
730  PGOGenerateArg = nullptr;
731 
732  auto *ProfileGenerateArg = Args.getLastArg(
733  options::OPT_fprofile_instr_generate,
734  options::OPT_fprofile_instr_generate_EQ,
735  options::OPT_fno_profile_instr_generate);
736  if (ProfileGenerateArg &&
737  ProfileGenerateArg->getOption().matches(
738  options::OPT_fno_profile_instr_generate))
739  ProfileGenerateArg = nullptr;
740 
741  if (PGOGenerateArg && ProfileGenerateArg)
742  D.Diag(diag::err_drv_argument_not_allowed_with)
743  << PGOGenerateArg->getSpelling() << ProfileGenerateArg->getSpelling();
744 
745  auto *ProfileUseArg = getLastProfileUseArg(Args);
746 
747  if (PGOGenerateArg && ProfileUseArg)
748  D.Diag(diag::err_drv_argument_not_allowed_with)
749  << ProfileUseArg->getSpelling() << PGOGenerateArg->getSpelling();
750 
751  if (ProfileGenerateArg && ProfileUseArg)
752  D.Diag(diag::err_drv_argument_not_allowed_with)
753  << ProfileGenerateArg->getSpelling() << ProfileUseArg->getSpelling();
754 
755  if (ProfileGenerateArg) {
756  if (ProfileGenerateArg->getOption().matches(
757  options::OPT_fprofile_instr_generate_EQ))
758  CmdArgs.push_back(Args.MakeArgString(Twine("-fprofile-instrument-path=") +
759  ProfileGenerateArg->getValue()));
760  // The default is to use Clang Instrumentation.
761  CmdArgs.push_back("-fprofile-instrument=clang");
762  }
763 
764  if (PGOGenerateArg) {
765  CmdArgs.push_back("-fprofile-instrument=llvm");
766  if (PGOGenerateArg->getOption().matches(
767  options::OPT_fprofile_generate_EQ)) {
768  SmallString<128> Path(PGOGenerateArg->getValue());
769  llvm::sys::path::append(Path, "default_%m.profraw");
770  CmdArgs.push_back(
771  Args.MakeArgString(Twine("-fprofile-instrument-path=") + Path));
772  }
773  }
774 
775  if (ProfileUseArg) {
776  if (ProfileUseArg->getOption().matches(options::OPT_fprofile_instr_use_EQ))
777  CmdArgs.push_back(Args.MakeArgString(
778  Twine("-fprofile-instrument-use-path=") + ProfileUseArg->getValue()));
779  else if ((ProfileUseArg->getOption().matches(
780  options::OPT_fprofile_use_EQ) ||
781  ProfileUseArg->getOption().matches(
782  options::OPT_fprofile_instr_use))) {
783  SmallString<128> Path(
784  ProfileUseArg->getNumValues() == 0 ? "" : ProfileUseArg->getValue());
785  if (Path.empty() || llvm::sys::fs::is_directory(Path))
786  llvm::sys::path::append(Path, "default.profdata");
787  CmdArgs.push_back(
788  Args.MakeArgString(Twine("-fprofile-instrument-use-path=") + Path));
789  }
790  }
791 
792  if (Args.hasArg(options::OPT_ftest_coverage) ||
793  Args.hasArg(options::OPT_coverage))
794  CmdArgs.push_back("-femit-coverage-notes");
795  if (Args.hasFlag(options::OPT_fprofile_arcs, options::OPT_fno_profile_arcs,
796  false) ||
797  Args.hasArg(options::OPT_coverage))
798  CmdArgs.push_back("-femit-coverage-data");
799 
800  if (Args.hasFlag(options::OPT_fcoverage_mapping,
801  options::OPT_fno_coverage_mapping, false)) {
802  if (!ProfileGenerateArg)
803  D.Diag(clang::diag::err_drv_argument_only_allowed_with)
804  << "-fcoverage-mapping"
805  << "-fprofile-instr-generate";
806 
807  CmdArgs.push_back("-fcoverage-mapping");
808  }
809 
810  if (Args.hasArg(options::OPT_fprofile_exclude_files_EQ)) {
811  auto *Arg = Args.getLastArg(options::OPT_fprofile_exclude_files_EQ);
812  if (!Args.hasArg(options::OPT_coverage))
813  D.Diag(clang::diag::err_drv_argument_only_allowed_with)
814  << "-fprofile-exclude-files="
815  << "--coverage";
816 
817  StringRef v = Arg->getValue();
818  CmdArgs.push_back(
819  Args.MakeArgString(Twine("-fprofile-exclude-files=" + v)));
820  }
821 
822  if (Args.hasArg(options::OPT_fprofile_filter_files_EQ)) {
823  auto *Arg = Args.getLastArg(options::OPT_fprofile_filter_files_EQ);
824  if (!Args.hasArg(options::OPT_coverage))
825  D.Diag(clang::diag::err_drv_argument_only_allowed_with)
826  << "-fprofile-filter-files="
827  << "--coverage";
828 
829  StringRef v = Arg->getValue();
830  CmdArgs.push_back(Args.MakeArgString(Twine("-fprofile-filter-files=" + v)));
831  }
832 
833  if (C.getArgs().hasArg(options::OPT_c) ||
834  C.getArgs().hasArg(options::OPT_S)) {
835  if (Output.isFilename()) {
836  CmdArgs.push_back("-coverage-notes-file");
837  SmallString<128> OutputFilename;
838  if (Arg *FinalOutput = C.getArgs().getLastArg(options::OPT_o))
839  OutputFilename = FinalOutput->getValue();
840  else
841  OutputFilename = llvm::sys::path::filename(Output.getBaseInput());
842  SmallString<128> CoverageFilename = OutputFilename;
843  if (llvm::sys::path::is_relative(CoverageFilename)) {
844  SmallString<128> Pwd;
845  if (!llvm::sys::fs::current_path(Pwd)) {
846  llvm::sys::path::append(Pwd, CoverageFilename);
847  CoverageFilename.swap(Pwd);
848  }
849  }
850  llvm::sys::path::replace_extension(CoverageFilename, "gcno");
851  CmdArgs.push_back(Args.MakeArgString(CoverageFilename));
852 
853  // Leave -fprofile-dir= an unused argument unless .gcda emission is
854  // enabled. To be polite, with '-fprofile-arcs -fno-profile-arcs' consider
855  // the flag used. There is no -fno-profile-dir, so the user has no
856  // targeted way to suppress the warning.
857  if (Args.hasArg(options::OPT_fprofile_arcs) ||
858  Args.hasArg(options::OPT_coverage)) {
859  CmdArgs.push_back("-coverage-data-file");
860  if (Arg *FProfileDir = Args.getLastArg(options::OPT_fprofile_dir)) {
861  CoverageFilename = FProfileDir->getValue();
862  llvm::sys::path::append(CoverageFilename, OutputFilename);
863  }
864  llvm::sys::path::replace_extension(CoverageFilename, "gcda");
865  CmdArgs.push_back(Args.MakeArgString(CoverageFilename));
866  }
867  }
868  }
869 }
870 
871 /// Check whether the given input tree contains any compilation actions.
872 static bool ContainsCompileAction(const Action *A) {
873  if (isa<CompileJobAction>(A) || isa<BackendJobAction>(A))
874  return true;
875 
876  for (const auto &AI : A->inputs())
877  if (ContainsCompileAction(AI))
878  return true;
879 
880  return false;
881 }
882 
883 /// Check if -relax-all should be passed to the internal assembler.
884 /// This is done by default when compiling non-assembler source with -O0.
885 static bool UseRelaxAll(Compilation &C, const ArgList &Args) {
886  bool RelaxDefault = true;
887 
888  if (Arg *A = Args.getLastArg(options::OPT_O_Group))
889  RelaxDefault = A->getOption().matches(options::OPT_O0);
890 
891  if (RelaxDefault) {
892  RelaxDefault = false;
893  for (const auto &Act : C.getActions()) {
894  if (ContainsCompileAction(Act)) {
895  RelaxDefault = true;
896  break;
897  }
898  }
899  }
900 
901  return Args.hasFlag(options::OPT_mrelax_all, options::OPT_mno_relax_all,
902  RelaxDefault);
903 }
904 
905 // Extract the integer N from a string spelled "-dwarf-N", returning 0
906 // on mismatch. The StringRef input (rather than an Arg) allows
907 // for use by the "-Xassembler" option parser.
908 static unsigned DwarfVersionNum(StringRef ArgValue) {
909  return llvm::StringSwitch<unsigned>(ArgValue)
910  .Case("-gdwarf-2", 2)
911  .Case("-gdwarf-3", 3)
912  .Case("-gdwarf-4", 4)
913  .Case("-gdwarf-5", 5)
914  .Default(0);
915 }
916 
917 static void RenderDebugEnablingArgs(const ArgList &Args, ArgStringList &CmdArgs,
919  unsigned DwarfVersion,
920  llvm::DebuggerKind DebuggerTuning) {
921  switch (DebugInfoKind) {
923  CmdArgs.push_back("-debug-info-kind=line-directives-only");
924  break;
926  CmdArgs.push_back("-debug-info-kind=line-tables-only");
927  break;
929  CmdArgs.push_back("-debug-info-kind=limited");
930  break;
932  CmdArgs.push_back("-debug-info-kind=standalone");
933  break;
934  default:
935  break;
936  }
937  if (DwarfVersion > 0)
938  CmdArgs.push_back(
939  Args.MakeArgString("-dwarf-version=" + Twine(DwarfVersion)));
940  switch (DebuggerTuning) {
941  case llvm::DebuggerKind::GDB:
942  CmdArgs.push_back("-debugger-tuning=gdb");
943  break;
944  case llvm::DebuggerKind::LLDB:
945  CmdArgs.push_back("-debugger-tuning=lldb");
946  break;
947  case llvm::DebuggerKind::SCE:
948  CmdArgs.push_back("-debugger-tuning=sce");
949  break;
950  default:
951  break;
952  }
953 }
954 
955 static bool checkDebugInfoOption(const Arg *A, const ArgList &Args,
956  const Driver &D, const ToolChain &TC) {
957  assert(A && "Expected non-nullptr argument.");
958  if (TC.supportsDebugInfoOption(A))
959  return true;
960  D.Diag(diag::warn_drv_unsupported_debug_info_opt_for_target)
961  << A->getAsString(Args) << TC.getTripleString();
962  return false;
963 }
964 
965 static void RenderDebugInfoCompressionArgs(const ArgList &Args,
966  ArgStringList &CmdArgs,
967  const Driver &D,
968  const ToolChain &TC) {
969  const Arg *A = Args.getLastArg(options::OPT_gz, options::OPT_gz_EQ);
970  if (!A)
971  return;
972  if (checkDebugInfoOption(A, Args, D, TC)) {
973  if (A->getOption().getID() == options::OPT_gz) {
974  if (llvm::zlib::isAvailable())
975  CmdArgs.push_back("-compress-debug-sections");
976  else
977  D.Diag(diag::warn_debug_compression_unavailable);
978  return;
979  }
980 
981  StringRef Value = A->getValue();
982  if (Value == "none") {
983  CmdArgs.push_back("-compress-debug-sections=none");
984  } else if (Value == "zlib" || Value == "zlib-gnu") {
985  if (llvm::zlib::isAvailable()) {
986  CmdArgs.push_back(
987  Args.MakeArgString("-compress-debug-sections=" + Twine(Value)));
988  } else {
989  D.Diag(diag::warn_debug_compression_unavailable);
990  }
991  } else {
992  D.Diag(diag::err_drv_unsupported_option_argument)
993  << A->getOption().getName() << Value;
994  }
995  }
996 }
997 
998 static const char *RelocationModelName(llvm::Reloc::Model Model) {
999  switch (Model) {
1000  case llvm::Reloc::Static:
1001  return "static";
1002  case llvm::Reloc::PIC_:
1003  return "pic";
1004  case llvm::Reloc::DynamicNoPIC:
1005  return "dynamic-no-pic";
1006  case llvm::Reloc::ROPI:
1007  return "ropi";
1008  case llvm::Reloc::RWPI:
1009  return "rwpi";
1010  case llvm::Reloc::ROPI_RWPI:
1011  return "ropi-rwpi";
1012  }
1013  llvm_unreachable("Unknown Reloc::Model kind");
1014 }
1015 
1016 void Clang::AddPreprocessingOptions(Compilation &C, const JobAction &JA,
1017  const Driver &D, const ArgList &Args,
1018  ArgStringList &CmdArgs,
1019  const InputInfo &Output,
1020  const InputInfoList &Inputs) const {
1021  Arg *A;
1022  const bool IsIAMCU = getToolChain().getTriple().isOSIAMCU();
1023 
1024  CheckPreprocessingOptions(D, Args);
1025 
1026  Args.AddLastArg(CmdArgs, options::OPT_C);
1027  Args.AddLastArg(CmdArgs, options::OPT_CC);
1028 
1029  // Handle dependency file generation.
1030  if ((A = Args.getLastArg(options::OPT_M, options::OPT_MM)) ||
1031  (A = Args.getLastArg(options::OPT_MD)) ||
1032  (A = Args.getLastArg(options::OPT_MMD))) {
1033  // Determine the output location.
1034  const char *DepFile;
1035  if (Arg *MF = Args.getLastArg(options::OPT_MF)) {
1036  DepFile = MF->getValue();
1037  C.addFailureResultFile(DepFile, &JA);
1038  } else if (Output.getType() == types::TY_Dependencies) {
1039  DepFile = Output.getFilename();
1040  } else if (A->getOption().matches(options::OPT_M) ||
1041  A->getOption().matches(options::OPT_MM)) {
1042  DepFile = "-";
1043  } else {
1044  DepFile = getDependencyFileName(Args, Inputs);
1045  C.addFailureResultFile(DepFile, &JA);
1046  }
1047  CmdArgs.push_back("-dependency-file");
1048  CmdArgs.push_back(DepFile);
1049 
1050  // Add a default target if one wasn't specified.
1051  if (!Args.hasArg(options::OPT_MT) && !Args.hasArg(options::OPT_MQ)) {
1052  const char *DepTarget;
1053 
1054  // If user provided -o, that is the dependency target, except
1055  // when we are only generating a dependency file.
1056  Arg *OutputOpt = Args.getLastArg(options::OPT_o);
1057  if (OutputOpt && Output.getType() != types::TY_Dependencies) {
1058  DepTarget = OutputOpt->getValue();
1059  } else {
1060  // Otherwise derive from the base input.
1061  //
1062  // FIXME: This should use the computed output file location.
1063  SmallString<128> P(Inputs[0].getBaseInput());
1064  llvm::sys::path::replace_extension(P, "o");
1065  DepTarget = Args.MakeArgString(llvm::sys::path::filename(P));
1066  }
1067 
1068  if (!A->getOption().matches(options::OPT_MD) && !A->getOption().matches(options::OPT_MMD)) {
1069  CmdArgs.push_back("-w");
1070  }
1071  CmdArgs.push_back("-MT");
1073  QuoteTarget(DepTarget, Quoted);
1074  CmdArgs.push_back(Args.MakeArgString(Quoted));
1075  }
1076 
1077  if (A->getOption().matches(options::OPT_M) ||
1078  A->getOption().matches(options::OPT_MD))
1079  CmdArgs.push_back("-sys-header-deps");
1080  if ((isa<PrecompileJobAction>(JA) &&
1081  !Args.hasArg(options::OPT_fno_module_file_deps)) ||
1082  Args.hasArg(options::OPT_fmodule_file_deps))
1083  CmdArgs.push_back("-module-file-deps");
1084  }
1085 
1086  if (Args.hasArg(options::OPT_MG)) {
1087  if (!A || A->getOption().matches(options::OPT_MD) ||
1088  A->getOption().matches(options::OPT_MMD))
1089  D.Diag(diag::err_drv_mg_requires_m_or_mm);
1090  CmdArgs.push_back("-MG");
1091  }
1092 
1093  Args.AddLastArg(CmdArgs, options::OPT_MP);
1094  Args.AddLastArg(CmdArgs, options::OPT_MV);
1095 
1096  // Convert all -MQ <target> args to -MT <quoted target>
1097  for (const Arg *A : Args.filtered(options::OPT_MT, options::OPT_MQ)) {
1098  A->claim();
1099 
1100  if (A->getOption().matches(options::OPT_MQ)) {
1101  CmdArgs.push_back("-MT");
1103  QuoteTarget(A->getValue(), Quoted);
1104  CmdArgs.push_back(Args.MakeArgString(Quoted));
1105 
1106  // -MT flag - no change
1107  } else {
1108  A->render(Args, CmdArgs);
1109  }
1110  }
1111 
1112  // Add offload include arguments specific for CUDA. This must happen before
1113  // we -I or -include anything else, because we must pick up the CUDA headers
1114  // from the particular CUDA installation, rather than from e.g.
1115  // /usr/local/include.
1117  getToolChain().AddCudaIncludeArgs(Args, CmdArgs);
1118 
1119  // Add -i* options, and automatically translate to
1120  // -include-pch/-include-pth for transparent PCH support. It's
1121  // wonky, but we include looking for .gch so we can support seamless
1122  // replacement into a build system already set up to be generating
1123  // .gch files.
1124 
1125  if (getToolChain().getDriver().IsCLMode()) {
1126  const Arg *YcArg = Args.getLastArg(options::OPT__SLASH_Yc);
1127  const Arg *YuArg = Args.getLastArg(options::OPT__SLASH_Yu);
1128  if (YcArg && JA.getKind() >= Action::PrecompileJobClass &&
1130  CmdArgs.push_back(Args.MakeArgString("-building-pch-with-obj"));
1131  }
1132  if (YcArg || YuArg) {
1133  StringRef ThroughHeader = YcArg ? YcArg->getValue() : YuArg->getValue();
1134  if (!isa<PrecompileJobAction>(JA)) {
1135  CmdArgs.push_back("-include-pch");
1136  CmdArgs.push_back(Args.MakeArgString(D.GetClPchPath(
1137  C, !ThroughHeader.empty()
1138  ? ThroughHeader
1139  : llvm::sys::path::filename(Inputs[0].getBaseInput()))));
1140  }
1141 
1142  if (ThroughHeader.empty()) {
1143  CmdArgs.push_back(Args.MakeArgString(
1144  Twine("-pch-through-hdrstop-") + (YcArg ? "create" : "use")));
1145  } else {
1146  CmdArgs.push_back(
1147  Args.MakeArgString(Twine("-pch-through-header=") + ThroughHeader));
1148  }
1149  }
1150  }
1151 
1152  bool RenderedImplicitInclude = false;
1153  for (const Arg *A : Args.filtered(options::OPT_clang_i_Group)) {
1154  if (A->getOption().matches(options::OPT_include)) {
1155  // Handling of gcc-style gch precompiled headers.
1156  bool IsFirstImplicitInclude = !RenderedImplicitInclude;
1157  RenderedImplicitInclude = true;
1158 
1159  bool FoundPCH = false;
1160  SmallString<128> P(A->getValue());
1161  // We want the files to have a name like foo.h.pch. Add a dummy extension
1162  // so that replace_extension does the right thing.
1163  P += ".dummy";
1164  llvm::sys::path::replace_extension(P, "pch");
1165  if (llvm::sys::fs::exists(P))
1166  FoundPCH = true;
1167 
1168  if (!FoundPCH) {
1169  llvm::sys::path::replace_extension(P, "gch");
1170  if (llvm::sys::fs::exists(P)) {
1171  FoundPCH = true;
1172  }
1173  }
1174 
1175  if (FoundPCH) {
1176  if (IsFirstImplicitInclude) {
1177  A->claim();
1178  CmdArgs.push_back("-include-pch");
1179  CmdArgs.push_back(Args.MakeArgString(P));
1180  continue;
1181  } else {
1182  // Ignore the PCH if not first on command line and emit warning.
1183  D.Diag(diag::warn_drv_pch_not_first_include) << P
1184  << A->getAsString(Args);
1185  }
1186  }
1187  } else if (A->getOption().matches(options::OPT_isystem_after)) {
1188  // Handling of paths which must come late. These entries are handled by
1189  // the toolchain itself after the resource dir is inserted in the right
1190  // search order.
1191  // Do not claim the argument so that the use of the argument does not
1192  // silently go unnoticed on toolchains which do not honour the option.
1193  continue;
1194  }
1195 
1196  // Not translated, render as usual.
1197  A->claim();
1198  A->render(Args, CmdArgs);
1199  }
1200 
1201  Args.AddAllArgs(CmdArgs,
1202  {options::OPT_D, options::OPT_U, options::OPT_I_Group,
1203  options::OPT_F, options::OPT_index_header_map});
1204 
1205  // Add -Wp, and -Xpreprocessor if using the preprocessor.
1206 
1207  // FIXME: There is a very unfortunate problem here, some troubled
1208  // souls abuse -Wp, to pass preprocessor options in gcc syntax. To
1209  // really support that we would have to parse and then translate
1210  // those options. :(
1211  Args.AddAllArgValues(CmdArgs, options::OPT_Wp_COMMA,
1212  options::OPT_Xpreprocessor);
1213 
1214  // -I- is a deprecated GCC feature, reject it.
1215  if (Arg *A = Args.getLastArg(options::OPT_I_))
1216  D.Diag(diag::err_drv_I_dash_not_supported) << A->getAsString(Args);
1217 
1218  // If we have a --sysroot, and don't have an explicit -isysroot flag, add an
1219  // -isysroot to the CC1 invocation.
1220  StringRef sysroot = C.getSysRoot();
1221  if (sysroot != "") {
1222  if (!Args.hasArg(options::OPT_isysroot)) {
1223  CmdArgs.push_back("-isysroot");
1224  CmdArgs.push_back(C.getArgs().MakeArgString(sysroot));
1225  }
1226  }
1227 
1228  // Parse additional include paths from environment variables.
1229  // FIXME: We should probably sink the logic for handling these from the
1230  // frontend into the driver. It will allow deleting 4 otherwise unused flags.
1231  // CPATH - included following the user specified includes (but prior to
1232  // builtin and standard includes).
1233  addDirectoryList(Args, CmdArgs, "-I", "CPATH");
1234  // C_INCLUDE_PATH - system includes enabled when compiling C.
1235  addDirectoryList(Args, CmdArgs, "-c-isystem", "C_INCLUDE_PATH");
1236  // CPLUS_INCLUDE_PATH - system includes enabled when compiling C++.
1237  addDirectoryList(Args, CmdArgs, "-cxx-isystem", "CPLUS_INCLUDE_PATH");
1238  // OBJC_INCLUDE_PATH - system includes enabled when compiling ObjC.
1239  addDirectoryList(Args, CmdArgs, "-objc-isystem", "OBJC_INCLUDE_PATH");
1240  // OBJCPLUS_INCLUDE_PATH - system includes enabled when compiling ObjC++.
1241  addDirectoryList(Args, CmdArgs, "-objcxx-isystem", "OBJCPLUS_INCLUDE_PATH");
1242 
1243  // While adding the include arguments, we also attempt to retrieve the
1244  // arguments of related offloading toolchains or arguments that are specific
1245  // of an offloading programming model.
1246 
1247  // Add C++ include arguments, if needed.
1248  if (types::isCXX(Inputs[0].getType()))
1249  forAllAssociatedToolChains(C, JA, getToolChain(),
1250  [&Args, &CmdArgs](const ToolChain &TC) {
1251  TC.AddClangCXXStdlibIncludeArgs(Args, CmdArgs);
1252  });
1253 
1254  // Add system include arguments for all targets but IAMCU.
1255  if (!IsIAMCU)
1256  forAllAssociatedToolChains(C, JA, getToolChain(),
1257  [&Args, &CmdArgs](const ToolChain &TC) {
1258  TC.AddClangSystemIncludeArgs(Args, CmdArgs);
1259  });
1260  else {
1261  // For IAMCU add special include arguments.
1262  getToolChain().AddIAMCUIncludeArgs(Args, CmdArgs);
1263  }
1264 }
1265 
1266 // FIXME: Move to target hook.
1267 static bool isSignedCharDefault(const llvm::Triple &Triple) {
1268  switch (Triple.getArch()) {
1269  default:
1270  return true;
1271 
1272  case llvm::Triple::aarch64:
1273  case llvm::Triple::aarch64_be:
1274  case llvm::Triple::arm:
1275  case llvm::Triple::armeb:
1276  case llvm::Triple::thumb:
1277  case llvm::Triple::thumbeb:
1278  if (Triple.isOSDarwin() || Triple.isOSWindows())
1279  return true;
1280  return false;
1281 
1282  case llvm::Triple::ppc:
1283  case llvm::Triple::ppc64:
1284  if (Triple.isOSDarwin())
1285  return true;
1286  return false;
1287 
1288  case llvm::Triple::hexagon:
1289  case llvm::Triple::ppc64le:
1290  case llvm::Triple::riscv32:
1291  case llvm::Triple::riscv64:
1292  case llvm::Triple::systemz:
1293  case llvm::Triple::xcore:
1294  return false;
1295  }
1296 }
1297 
1298 static bool isNoCommonDefault(const llvm::Triple &Triple) {
1299  switch (Triple.getArch()) {
1300  default:
1301  if (Triple.isOSFuchsia())
1302  return true;
1303  return false;
1304 
1305  case llvm::Triple::xcore:
1306  case llvm::Triple::wasm32:
1307  case llvm::Triple::wasm64:
1308  return true;
1309  }
1310 }
1311 
1312 namespace {
1313 void RenderARMABI(const llvm::Triple &Triple, const ArgList &Args,
1314  ArgStringList &CmdArgs) {
1315  // Select the ABI to use.
1316  // FIXME: Support -meabi.
1317  // FIXME: Parts of this are duplicated in the backend, unify this somehow.
1318  const char *ABIName = nullptr;
1319  if (Arg *A = Args.getLastArg(options::OPT_mabi_EQ)) {
1320  ABIName = A->getValue();
1321  } else {
1322  std::string CPU = getCPUName(Args, Triple, /*FromAs*/ false);
1323  ABIName = llvm::ARM::computeDefaultTargetABI(Triple, CPU).data();
1324  }
1325 
1326  CmdArgs.push_back("-target-abi");
1327  CmdArgs.push_back(ABIName);
1328 }
1329 }
1330 
1331 void Clang::AddARMTargetArgs(const llvm::Triple &Triple, const ArgList &Args,
1332  ArgStringList &CmdArgs, bool KernelOrKext) const {
1333  RenderARMABI(Triple, Args, CmdArgs);
1334 
1335  // Determine floating point ABI from the options & target defaults.
1336  arm::FloatABI ABI = arm::getARMFloatABI(getToolChain(), Args);
1337  if (ABI == arm::FloatABI::Soft) {
1338  // Floating point operations and argument passing are soft.
1339  // FIXME: This changes CPP defines, we need -target-soft-float.
1340  CmdArgs.push_back("-msoft-float");
1341  CmdArgs.push_back("-mfloat-abi");
1342  CmdArgs.push_back("soft");
1343  } else if (ABI == arm::FloatABI::SoftFP) {
1344  // Floating point operations are hard, but argument passing is soft.
1345  CmdArgs.push_back("-mfloat-abi");
1346  CmdArgs.push_back("soft");
1347  } else {
1348  // Floating point operations and argument passing are hard.
1349  assert(ABI == arm::FloatABI::Hard && "Invalid float abi!");
1350  CmdArgs.push_back("-mfloat-abi");
1351  CmdArgs.push_back("hard");
1352  }
1353 
1354  // Forward the -mglobal-merge option for explicit control over the pass.
1355  if (Arg *A = Args.getLastArg(options::OPT_mglobal_merge,
1356  options::OPT_mno_global_merge)) {
1357  CmdArgs.push_back("-mllvm");
1358  if (A->getOption().matches(options::OPT_mno_global_merge))
1359  CmdArgs.push_back("-arm-global-merge=false");
1360  else
1361  CmdArgs.push_back("-arm-global-merge=true");
1362  }
1363 
1364  if (!Args.hasFlag(options::OPT_mimplicit_float,
1365  options::OPT_mno_implicit_float, true))
1366  CmdArgs.push_back("-no-implicit-float");
1367 }
1368 
1369 void Clang::RenderTargetOptions(const llvm::Triple &EffectiveTriple,
1370  const ArgList &Args, bool KernelOrKext,
1371  ArgStringList &CmdArgs) const {
1372  const ToolChain &TC = getToolChain();
1373 
1374  // Add the target features
1375  getTargetFeatures(TC, EffectiveTriple, Args, CmdArgs, false);
1376 
1377  // Add target specific flags.
1378  switch (TC.getArch()) {
1379  default:
1380  break;
1381 
1382  case llvm::Triple::arm:
1383  case llvm::Triple::armeb:
1384  case llvm::Triple::thumb:
1385  case llvm::Triple::thumbeb:
1386  // Use the effective triple, which takes into account the deployment target.
1387  AddARMTargetArgs(EffectiveTriple, Args, CmdArgs, KernelOrKext);
1388  CmdArgs.push_back("-fallow-half-arguments-and-returns");
1389  break;
1390 
1391  case llvm::Triple::aarch64:
1392  case llvm::Triple::aarch64_be:
1393  AddAArch64TargetArgs(Args, CmdArgs);
1394  CmdArgs.push_back("-fallow-half-arguments-and-returns");
1395  break;
1396 
1397  case llvm::Triple::mips:
1398  case llvm::Triple::mipsel:
1399  case llvm::Triple::mips64:
1400  case llvm::Triple::mips64el:
1401  AddMIPSTargetArgs(Args, CmdArgs);
1402  break;
1403 
1404  case llvm::Triple::ppc:
1405  case llvm::Triple::ppc64:
1406  case llvm::Triple::ppc64le:
1407  AddPPCTargetArgs(Args, CmdArgs);
1408  break;
1409 
1410  case llvm::Triple::riscv32:
1411  case llvm::Triple::riscv64:
1412  AddRISCVTargetArgs(Args, CmdArgs);
1413  break;
1414 
1415  case llvm::Triple::sparc:
1416  case llvm::Triple::sparcel:
1417  case llvm::Triple::sparcv9:
1418  AddSparcTargetArgs(Args, CmdArgs);
1419  break;
1420 
1421  case llvm::Triple::systemz:
1422  AddSystemZTargetArgs(Args, CmdArgs);
1423  break;
1424 
1425  case llvm::Triple::x86:
1426  case llvm::Triple::x86_64:
1427  AddX86TargetArgs(Args, CmdArgs);
1428  break;
1429 
1430  case llvm::Triple::lanai:
1431  AddLanaiTargetArgs(Args, CmdArgs);
1432  break;
1433 
1434  case llvm::Triple::hexagon:
1435  AddHexagonTargetArgs(Args, CmdArgs);
1436  break;
1437 
1438  case llvm::Triple::wasm32:
1439  case llvm::Triple::wasm64:
1440  AddWebAssemblyTargetArgs(Args, CmdArgs);
1441  break;
1442  }
1443 }
1444 
1445 // Parse -mbranch-protection=<protection>[+<protection>]* where
1446 // <protection> ::= standard | none | [bti,pac-ret[+b-key,+leaf]*]
1447 // Returns a triple of (return address signing Scope, signing key, require
1448 // landing pads)
1449 static std::tuple<StringRef, StringRef, bool>
1450 ParseAArch64BranchProtection(const Driver &D, const ArgList &Args,
1451  const Arg *A) {
1452  StringRef Scope = "none";
1453  StringRef Key = "a_key";
1454  bool IndirectBranches = false;
1455 
1456  StringRef Value = A->getValue();
1457  // This maps onto -mbranch-protection=<scope>+<key>
1458 
1459  if (Value.equals("standard")) {
1460  Scope = "non-leaf";
1461  Key = "a_key";
1462  IndirectBranches = true;
1463 
1464  } else if (!Value.equals("none")) {
1465  SmallVector<StringRef, 4> BranchProtection;
1466  StringRef(A->getValue()).split(BranchProtection, '+');
1467 
1468  auto Protection = BranchProtection.begin();
1469  while (Protection != BranchProtection.end()) {
1470  if (Protection->equals("bti"))
1471  IndirectBranches = true;
1472  else if (Protection->equals("pac-ret")) {
1473  Scope = "non-leaf";
1474  while (++Protection != BranchProtection.end()) {
1475  // Inner loop as "leaf" and "b-key" options must only appear attached
1476  // to pac-ret.
1477  if (Protection->equals("leaf"))
1478  Scope = "all";
1479  else if (Protection->equals("b-key"))
1480  Key = "b_key";
1481  else
1482  break;
1483  }
1484  Protection--;
1485  } else
1486  D.Diag(diag::err_invalid_branch_protection)
1487  << *Protection << A->getAsString(Args);
1488  Protection++;
1489  }
1490  }
1491 
1492  return std::make_tuple(Scope, Key, IndirectBranches);
1493 }
1494 
1495 namespace {
1496 void RenderAArch64ABI(const llvm::Triple &Triple, const ArgList &Args,
1497  ArgStringList &CmdArgs) {
1498  const char *ABIName = nullptr;
1499  if (Arg *A = Args.getLastArg(options::OPT_mabi_EQ))
1500  ABIName = A->getValue();
1501  else if (Triple.isOSDarwin())
1502  ABIName = "darwinpcs";
1503  else
1504  ABIName = "aapcs";
1505 
1506  CmdArgs.push_back("-target-abi");
1507  CmdArgs.push_back(ABIName);
1508 }
1509 }
1510 
1511 void Clang::AddAArch64TargetArgs(const ArgList &Args,
1512  ArgStringList &CmdArgs) const {
1513  const llvm::Triple &Triple = getToolChain().getEffectiveTriple();
1514 
1515  if (!Args.hasFlag(options::OPT_mred_zone, options::OPT_mno_red_zone, true) ||
1516  Args.hasArg(options::OPT_mkernel) ||
1517  Args.hasArg(options::OPT_fapple_kext))
1518  CmdArgs.push_back("-disable-red-zone");
1519 
1520  if (!Args.hasFlag(options::OPT_mimplicit_float,
1521  options::OPT_mno_implicit_float, true))
1522  CmdArgs.push_back("-no-implicit-float");
1523 
1524  RenderAArch64ABI(Triple, Args, CmdArgs);
1525 
1526  if (Arg *A = Args.getLastArg(options::OPT_mfix_cortex_a53_835769,
1527  options::OPT_mno_fix_cortex_a53_835769)) {
1528  CmdArgs.push_back("-mllvm");
1529  if (A->getOption().matches(options::OPT_mfix_cortex_a53_835769))
1530  CmdArgs.push_back("-aarch64-fix-cortex-a53-835769=1");
1531  else
1532  CmdArgs.push_back("-aarch64-fix-cortex-a53-835769=0");
1533  } else if (Triple.isAndroid()) {
1534  // Enabled A53 errata (835769) workaround by default on android
1535  CmdArgs.push_back("-mllvm");
1536  CmdArgs.push_back("-aarch64-fix-cortex-a53-835769=1");
1537  }
1538 
1539  // Forward the -mglobal-merge option for explicit control over the pass.
1540  if (Arg *A = Args.getLastArg(options::OPT_mglobal_merge,
1541  options::OPT_mno_global_merge)) {
1542  CmdArgs.push_back("-mllvm");
1543  if (A->getOption().matches(options::OPT_mno_global_merge))
1544  CmdArgs.push_back("-aarch64-enable-global-merge=false");
1545  else
1546  CmdArgs.push_back("-aarch64-enable-global-merge=true");
1547  }
1548 
1549  // Enable/disable return address signing and indirect branch targets.
1550  if (Arg *A = Args.getLastArg(options::OPT_msign_return_address_EQ,
1551  options::OPT_mbranch_protection_EQ)) {
1552 
1553  const Driver &D = getToolChain().getDriver();
1554 
1555  StringRef Scope, Key;
1556  bool IndirectBranches;
1557 
1558  if (A->getOption().matches(options::OPT_msign_return_address_EQ)) {
1559  Scope = A->getValue();
1560  if (!Scope.equals("none") && !Scope.equals("non-leaf") &&
1561  !Scope.equals("all"))
1562  D.Diag(diag::err_invalid_branch_protection)
1563  << Scope << A->getAsString(Args);
1564  Key = "a_key";
1565  IndirectBranches = false;
1566  } else
1567  std::tie(Scope, Key, IndirectBranches) =
1568  ParseAArch64BranchProtection(D, Args, A);
1569 
1570  CmdArgs.push_back(
1571  Args.MakeArgString(Twine("-msign-return-address=") + Scope));
1572  CmdArgs.push_back(
1573  Args.MakeArgString(Twine("-msign-return-address-key=") + Key));
1574  if (IndirectBranches)
1575  CmdArgs.push_back("-mbranch-target-enforce");
1576  }
1577 }
1578 
1579 void Clang::AddMIPSTargetArgs(const ArgList &Args,
1580  ArgStringList &CmdArgs) const {
1581  const Driver &D = getToolChain().getDriver();
1582  StringRef CPUName;
1583  StringRef ABIName;
1584  const llvm::Triple &Triple = getToolChain().getTriple();
1585  mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName);
1586 
1587  CmdArgs.push_back("-target-abi");
1588  CmdArgs.push_back(ABIName.data());
1589 
1590  mips::FloatABI ABI = mips::getMipsFloatABI(D, Args);
1591  if (ABI == mips::FloatABI::Soft) {
1592  // Floating point operations and argument passing are soft.
1593  CmdArgs.push_back("-msoft-float");
1594  CmdArgs.push_back("-mfloat-abi");
1595  CmdArgs.push_back("soft");
1596  } else {
1597  // Floating point operations and argument passing are hard.
1598  assert(ABI == mips::FloatABI::Hard && "Invalid float abi!");
1599  CmdArgs.push_back("-mfloat-abi");
1600  CmdArgs.push_back("hard");
1601  }
1602 
1603  if (Arg *A = Args.getLastArg(options::OPT_mxgot, options::OPT_mno_xgot)) {
1604  if (A->getOption().matches(options::OPT_mxgot)) {
1605  CmdArgs.push_back("-mllvm");
1606  CmdArgs.push_back("-mxgot");
1607  }
1608  }
1609 
1610  if (Arg *A = Args.getLastArg(options::OPT_mldc1_sdc1,
1611  options::OPT_mno_ldc1_sdc1)) {
1612  if (A->getOption().matches(options::OPT_mno_ldc1_sdc1)) {
1613  CmdArgs.push_back("-mllvm");
1614  CmdArgs.push_back("-mno-ldc1-sdc1");
1615  }
1616  }
1617 
1618  if (Arg *A = Args.getLastArg(options::OPT_mcheck_zero_division,
1619  options::OPT_mno_check_zero_division)) {
1620  if (A->getOption().matches(options::OPT_mno_check_zero_division)) {
1621  CmdArgs.push_back("-mllvm");
1622  CmdArgs.push_back("-mno-check-zero-division");
1623  }
1624  }
1625 
1626  if (Arg *A = Args.getLastArg(options::OPT_G)) {
1627  StringRef v = A->getValue();
1628  CmdArgs.push_back("-mllvm");
1629  CmdArgs.push_back(Args.MakeArgString("-mips-ssection-threshold=" + v));
1630  A->claim();
1631  }
1632 
1633  Arg *GPOpt = Args.getLastArg(options::OPT_mgpopt, options::OPT_mno_gpopt);
1634  Arg *ABICalls =
1635  Args.getLastArg(options::OPT_mabicalls, options::OPT_mno_abicalls);
1636 
1637  // -mabicalls is the default for many MIPS environments, even with -fno-pic.
1638  // -mgpopt is the default for static, -fno-pic environments but these two
1639  // options conflict. We want to be certain that -mno-abicalls -mgpopt is
1640  // the only case where -mllvm -mgpopt is passed.
1641  // NOTE: We need a warning here or in the backend to warn when -mgpopt is
1642  // passed explicitly when compiling something with -mabicalls
1643  // (implictly) in affect. Currently the warning is in the backend.
1644  //
1645  // When the ABI in use is N64, we also need to determine the PIC mode that
1646  // is in use, as -fno-pic for N64 implies -mno-abicalls.
1647  bool NoABICalls =
1648  ABICalls && ABICalls->getOption().matches(options::OPT_mno_abicalls);
1649 
1650  llvm::Reloc::Model RelocationModel;
1651  unsigned PICLevel;
1652  bool IsPIE;
1653  std::tie(RelocationModel, PICLevel, IsPIE) =
1654  ParsePICArgs(getToolChain(), Args);
1655 
1656  NoABICalls = NoABICalls ||
1657  (RelocationModel == llvm::Reloc::Static && ABIName == "n64");
1658 
1659  bool WantGPOpt = GPOpt && GPOpt->getOption().matches(options::OPT_mgpopt);
1660  // We quietly ignore -mno-gpopt as the backend defaults to -mno-gpopt.
1661  if (NoABICalls && (!GPOpt || WantGPOpt)) {
1662  CmdArgs.push_back("-mllvm");
1663  CmdArgs.push_back("-mgpopt");
1664 
1665  Arg *LocalSData = Args.getLastArg(options::OPT_mlocal_sdata,
1666  options::OPT_mno_local_sdata);
1667  Arg *ExternSData = Args.getLastArg(options::OPT_mextern_sdata,
1668  options::OPT_mno_extern_sdata);
1669  Arg *EmbeddedData = Args.getLastArg(options::OPT_membedded_data,
1670  options::OPT_mno_embedded_data);
1671  if (LocalSData) {
1672  CmdArgs.push_back("-mllvm");
1673  if (LocalSData->getOption().matches(options::OPT_mlocal_sdata)) {
1674  CmdArgs.push_back("-mlocal-sdata=1");
1675  } else {
1676  CmdArgs.push_back("-mlocal-sdata=0");
1677  }
1678  LocalSData->claim();
1679  }
1680 
1681  if (ExternSData) {
1682  CmdArgs.push_back("-mllvm");
1683  if (ExternSData->getOption().matches(options::OPT_mextern_sdata)) {
1684  CmdArgs.push_back("-mextern-sdata=1");
1685  } else {
1686  CmdArgs.push_back("-mextern-sdata=0");
1687  }
1688  ExternSData->claim();
1689  }
1690 
1691  if (EmbeddedData) {
1692  CmdArgs.push_back("-mllvm");
1693  if (EmbeddedData->getOption().matches(options::OPT_membedded_data)) {
1694  CmdArgs.push_back("-membedded-data=1");
1695  } else {
1696  CmdArgs.push_back("-membedded-data=0");
1697  }
1698  EmbeddedData->claim();
1699  }
1700 
1701  } else if ((!ABICalls || (!NoABICalls && ABICalls)) && WantGPOpt)
1702  D.Diag(diag::warn_drv_unsupported_gpopt) << (ABICalls ? 0 : 1);
1703 
1704  if (GPOpt)
1705  GPOpt->claim();
1706 
1707  if (Arg *A = Args.getLastArg(options::OPT_mcompact_branches_EQ)) {
1708  StringRef Val = StringRef(A->getValue());
1709  if (mips::hasCompactBranches(CPUName)) {
1710  if (Val == "never" || Val == "always" || Val == "optimal") {
1711  CmdArgs.push_back("-mllvm");
1712  CmdArgs.push_back(Args.MakeArgString("-mips-compact-branches=" + Val));
1713  } else
1714  D.Diag(diag::err_drv_unsupported_option_argument)
1715  << A->getOption().getName() << Val;
1716  } else
1717  D.Diag(diag::warn_target_unsupported_compact_branches) << CPUName;
1718  }
1719 
1720  if (Arg *A = Args.getLastArg(options::OPT_mrelax_pic_calls,
1721  options::OPT_mno_relax_pic_calls)) {
1722  if (A->getOption().matches(options::OPT_mno_relax_pic_calls)) {
1723  CmdArgs.push_back("-mllvm");
1724  CmdArgs.push_back("-mips-jalr-reloc=0");
1725  }
1726  }
1727 }
1728 
1729 void Clang::AddPPCTargetArgs(const ArgList &Args,
1730  ArgStringList &CmdArgs) const {
1731  // Select the ABI to use.
1732  const char *ABIName = nullptr;
1733  if (getToolChain().getTriple().isOSLinux())
1734  switch (getToolChain().getArch()) {
1735  case llvm::Triple::ppc64: {
1736  // When targeting a processor that supports QPX, or if QPX is
1737  // specifically enabled, default to using the ABI that supports QPX (so
1738  // long as it is not specifically disabled).
1739  bool HasQPX = false;
1740  if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
1741  HasQPX = A->getValue() == StringRef("a2q");
1742  HasQPX = Args.hasFlag(options::OPT_mqpx, options::OPT_mno_qpx, HasQPX);
1743  if (HasQPX) {
1744  ABIName = "elfv1-qpx";
1745  break;
1746  }
1747 
1748  ABIName = "elfv1";
1749  break;
1750  }
1751  case llvm::Triple::ppc64le:
1752  ABIName = "elfv2";
1753  break;
1754  default:
1755  break;
1756  }
1757 
1758  if (Arg *A = Args.getLastArg(options::OPT_mabi_EQ))
1759  // The ppc64 linux abis are all "altivec" abis by default. Accept and ignore
1760  // the option if given as we don't have backend support for any targets
1761  // that don't use the altivec abi.
1762  if (StringRef(A->getValue()) != "altivec")
1763  ABIName = A->getValue();
1764 
1766  ppc::getPPCFloatABI(getToolChain().getDriver(), Args);
1767 
1768  if (FloatABI == ppc::FloatABI::Soft) {
1769  // Floating point operations and argument passing are soft.
1770  CmdArgs.push_back("-msoft-float");
1771  CmdArgs.push_back("-mfloat-abi");
1772  CmdArgs.push_back("soft");
1773  } else {
1774  // Floating point operations and argument passing are hard.
1775  assert(FloatABI == ppc::FloatABI::Hard && "Invalid float abi!");
1776  CmdArgs.push_back("-mfloat-abi");
1777  CmdArgs.push_back("hard");
1778  }
1779 
1780  if (ABIName) {
1781  CmdArgs.push_back("-target-abi");
1782  CmdArgs.push_back(ABIName);
1783  }
1784 }
1785 
1786 void Clang::AddRISCVTargetArgs(const ArgList &Args,
1787  ArgStringList &CmdArgs) const {
1788  // FIXME: currently defaults to the soft-float ABIs. Will need to be
1789  // expanded to select ilp32f, ilp32d, lp64f, lp64d when appropriate.
1790  const char *ABIName = nullptr;
1791  const llvm::Triple &Triple = getToolChain().getTriple();
1792  if (Arg *A = Args.getLastArg(options::OPT_mabi_EQ))
1793  ABIName = A->getValue();
1794  else if (Triple.getArch() == llvm::Triple::riscv32)
1795  ABIName = "ilp32";
1796  else if (Triple.getArch() == llvm::Triple::riscv64)
1797  ABIName = "lp64";
1798  else
1799  llvm_unreachable("Unexpected triple!");
1800 
1801  CmdArgs.push_back("-target-abi");
1802  CmdArgs.push_back(ABIName);
1803 }
1804 
1805 void Clang::AddSparcTargetArgs(const ArgList &Args,
1806  ArgStringList &CmdArgs) const {
1808  sparc::getSparcFloatABI(getToolChain().getDriver(), Args);
1809 
1810  if (FloatABI == sparc::FloatABI::Soft) {
1811  // Floating point operations and argument passing are soft.
1812  CmdArgs.push_back("-msoft-float");
1813  CmdArgs.push_back("-mfloat-abi");
1814  CmdArgs.push_back("soft");
1815  } else {
1816  // Floating point operations and argument passing are hard.
1817  assert(FloatABI == sparc::FloatABI::Hard && "Invalid float abi!");
1818  CmdArgs.push_back("-mfloat-abi");
1819  CmdArgs.push_back("hard");
1820  }
1821 }
1822 
1823 void Clang::AddSystemZTargetArgs(const ArgList &Args,
1824  ArgStringList &CmdArgs) const {
1825  if (Args.hasFlag(options::OPT_mbackchain, options::OPT_mno_backchain, false))
1826  CmdArgs.push_back("-mbackchain");
1827 }
1828 
1829 void Clang::AddX86TargetArgs(const ArgList &Args,
1830  ArgStringList &CmdArgs) const {
1831  if (!Args.hasFlag(options::OPT_mred_zone, options::OPT_mno_red_zone, true) ||
1832  Args.hasArg(options::OPT_mkernel) ||
1833  Args.hasArg(options::OPT_fapple_kext))
1834  CmdArgs.push_back("-disable-red-zone");
1835 
1836  if (!Args.hasFlag(options::OPT_mtls_direct_seg_refs,
1837  options::OPT_mno_tls_direct_seg_refs, true))
1838  CmdArgs.push_back("-mno-tls-direct-seg-refs");
1839 
1840  // Default to avoid implicit floating-point for kernel/kext code, but allow
1841  // that to be overridden with -mno-soft-float.
1842  bool NoImplicitFloat = (Args.hasArg(options::OPT_mkernel) ||
1843  Args.hasArg(options::OPT_fapple_kext));
1844  if (Arg *A = Args.getLastArg(
1845  options::OPT_msoft_float, options::OPT_mno_soft_float,
1846  options::OPT_mimplicit_float, options::OPT_mno_implicit_float)) {
1847  const Option &O = A->getOption();
1848  NoImplicitFloat = (O.matches(options::OPT_mno_implicit_float) ||
1849  O.matches(options::OPT_msoft_float));
1850  }
1851  if (NoImplicitFloat)
1852  CmdArgs.push_back("-no-implicit-float");
1853 
1854  if (Arg *A = Args.getLastArg(options::OPT_masm_EQ)) {
1855  StringRef Value = A->getValue();
1856  if (Value == "intel" || Value == "att") {
1857  CmdArgs.push_back("-mllvm");
1858  CmdArgs.push_back(Args.MakeArgString("-x86-asm-syntax=" + Value));
1859  } else {
1860  getToolChain().getDriver().Diag(diag::err_drv_unsupported_option_argument)
1861  << A->getOption().getName() << Value;
1862  }
1863  } else if (getToolChain().getDriver().IsCLMode()) {
1864  CmdArgs.push_back("-mllvm");
1865  CmdArgs.push_back("-x86-asm-syntax=intel");
1866  }
1867 
1868  // Set flags to support MCU ABI.
1869  if (Args.hasFlag(options::OPT_miamcu, options::OPT_mno_iamcu, false)) {
1870  CmdArgs.push_back("-mfloat-abi");
1871  CmdArgs.push_back("soft");
1872  CmdArgs.push_back("-mstack-alignment=4");
1873  }
1874 }
1875 
1876 void Clang::AddHexagonTargetArgs(const ArgList &Args,
1877  ArgStringList &CmdArgs) const {
1878  CmdArgs.push_back("-mqdsp6-compat");
1879  CmdArgs.push_back("-Wreturn-type");
1880 
1882  CmdArgs.push_back("-mllvm");
1883  CmdArgs.push_back(Args.MakeArgString("-hexagon-small-data-threshold=" +
1884  Twine(G.getValue())));
1885  }
1886 
1887  if (!Args.hasArg(options::OPT_fno_short_enums))
1888  CmdArgs.push_back("-fshort-enums");
1889  if (Args.getLastArg(options::OPT_mieee_rnd_near)) {
1890  CmdArgs.push_back("-mllvm");
1891  CmdArgs.push_back("-enable-hexagon-ieee-rnd-near");
1892  }
1893  CmdArgs.push_back("-mllvm");
1894  CmdArgs.push_back("-machine-sink-split=0");
1895 }
1896 
1897 void Clang::AddLanaiTargetArgs(const ArgList &Args,
1898  ArgStringList &CmdArgs) const {
1899  if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
1900  StringRef CPUName = A->getValue();
1901 
1902  CmdArgs.push_back("-target-cpu");
1903  CmdArgs.push_back(Args.MakeArgString(CPUName));
1904  }
1905  if (Arg *A = Args.getLastArg(options::OPT_mregparm_EQ)) {
1906  StringRef Value = A->getValue();
1907  // Only support mregparm=4 to support old usage. Report error for all other
1908  // cases.
1909  int Mregparm;
1910  if (Value.getAsInteger(10, Mregparm)) {
1911  if (Mregparm != 4) {
1912  getToolChain().getDriver().Diag(
1913  diag::err_drv_unsupported_option_argument)
1914  << A->getOption().getName() << Value;
1915  }
1916  }
1917  }
1918 }
1919 
1920 void Clang::AddWebAssemblyTargetArgs(const ArgList &Args,
1921  ArgStringList &CmdArgs) const {
1922  // Default to "hidden" visibility.
1923  if (!Args.hasArg(options::OPT_fvisibility_EQ,
1924  options::OPT_fvisibility_ms_compat)) {
1925  CmdArgs.push_back("-fvisibility");
1926  CmdArgs.push_back("hidden");
1927  }
1928 }
1929 
1930 void Clang::DumpCompilationDatabase(Compilation &C, StringRef Filename,
1931  StringRef Target, const InputInfo &Output,
1932  const InputInfo &Input, const ArgList &Args) const {
1933  // If this is a dry run, do not create the compilation database file.
1934  if (C.getArgs().hasArg(options::OPT__HASH_HASH_HASH))
1935  return;
1936 
1937  using llvm::yaml::escape;
1938  const Driver &D = getToolChain().getDriver();
1939 
1940  if (!CompilationDatabase) {
1941  std::error_code EC;
1942  auto File = llvm::make_unique<llvm::raw_fd_ostream>(Filename, EC, llvm::sys::fs::F_Text);
1943  if (EC) {
1944  D.Diag(clang::diag::err_drv_compilationdatabase) << Filename
1945  << EC.message();
1946  return;
1947  }
1948  CompilationDatabase = std::move(File);
1949  }
1950  auto &CDB = *CompilationDatabase;
1951  SmallString<128> Buf;
1952  if (llvm::sys::fs::current_path(Buf))
1953  Buf = ".";
1954  CDB << "{ \"directory\": \"" << escape(Buf) << "\"";
1955  CDB << ", \"file\": \"" << escape(Input.getFilename()) << "\"";
1956  CDB << ", \"output\": \"" << escape(Output.getFilename()) << "\"";
1957  CDB << ", \"arguments\": [\"" << escape(D.ClangExecutable) << "\"";
1958  Buf = "-x";
1959  Buf += types::getTypeName(Input.getType());
1960  CDB << ", \"" << escape(Buf) << "\"";
1961  if (!D.SysRoot.empty() && !Args.hasArg(options::OPT__sysroot_EQ)) {
1962  Buf = "--sysroot=";
1963  Buf += D.SysRoot;
1964  CDB << ", \"" << escape(Buf) << "\"";
1965  }
1966  CDB << ", \"" << escape(Input.getFilename()) << "\"";
1967  for (auto &A: Args) {
1968  auto &O = A->getOption();
1969  // Skip language selection, which is positional.
1970  if (O.getID() == options::OPT_x)
1971  continue;
1972  // Skip writing dependency output and the compilation database itself.
1973  if (O.getGroup().isValid() && O.getGroup().getID() == options::OPT_M_Group)
1974  continue;
1975  // Skip inputs.
1976  if (O.getKind() == Option::InputClass)
1977  continue;
1978  // All other arguments are quoted and appended.
1979  ArgStringList ASL;
1980  A->render(Args, ASL);
1981  for (auto &it: ASL)
1982  CDB << ", \"" << escape(it) << "\"";
1983  }
1984  Buf = "--target=";
1985  Buf += Target;
1986  CDB << ", \"" << escape(Buf) << "\"]},\n";
1987 }
1988 
1990  const ArgList &Args,
1991  ArgStringList &CmdArgs,
1992  const Driver &D) {
1993  if (UseRelaxAll(C, Args))
1994  CmdArgs.push_back("-mrelax-all");
1995 
1996  // Only default to -mincremental-linker-compatible if we think we are
1997  // targeting the MSVC linker.
1998  bool DefaultIncrementalLinkerCompatible =
1999  C.getDefaultToolChain().getTriple().isWindowsMSVCEnvironment();
2000  if (Args.hasFlag(options::OPT_mincremental_linker_compatible,
2001  options::OPT_mno_incremental_linker_compatible,
2002  DefaultIncrementalLinkerCompatible))
2003  CmdArgs.push_back("-mincremental-linker-compatible");
2004 
2005  switch (C.getDefaultToolChain().getArch()) {
2006  case llvm::Triple::arm:
2007  case llvm::Triple::armeb:
2008  case llvm::Triple::thumb:
2009  case llvm::Triple::thumbeb:
2010  if (Arg *A = Args.getLastArg(options::OPT_mimplicit_it_EQ)) {
2011  StringRef Value = A->getValue();
2012  if (Value == "always" || Value == "never" || Value == "arm" ||
2013  Value == "thumb") {
2014  CmdArgs.push_back("-mllvm");
2015  CmdArgs.push_back(Args.MakeArgString("-arm-implicit-it=" + Value));
2016  } else {
2017  D.Diag(diag::err_drv_unsupported_option_argument)
2018  << A->getOption().getName() << Value;
2019  }
2020  }
2021  break;
2022  default:
2023  break;
2024  }
2025 
2026  // When passing -I arguments to the assembler we sometimes need to
2027  // unconditionally take the next argument. For example, when parsing
2028  // '-Wa,-I -Wa,foo' we need to accept the -Wa,foo arg after seeing the
2029  // -Wa,-I arg and when parsing '-Wa,-I,foo' we need to accept the 'foo'
2030  // arg after parsing the '-I' arg.
2031  bool TakeNextArg = false;
2032 
2033  bool UseRelaxRelocations = C.getDefaultToolChain().useRelaxRelocations();
2034  const char *MipsTargetFeature = nullptr;
2035  for (const Arg *A :
2036  Args.filtered(options::OPT_Wa_COMMA, options::OPT_Xassembler)) {
2037  A->claim();
2038 
2039  for (StringRef Value : A->getValues()) {
2040  if (TakeNextArg) {
2041  CmdArgs.push_back(Value.data());
2042  TakeNextArg = false;
2043  continue;
2044  }
2045 
2046  if (C.getDefaultToolChain().getTriple().isOSBinFormatCOFF() &&
2047  Value == "-mbig-obj")
2048  continue; // LLVM handles bigobj automatically
2049 
2050  switch (C.getDefaultToolChain().getArch()) {
2051  default:
2052  break;
2053  case llvm::Triple::thumb:
2054  case llvm::Triple::thumbeb:
2055  case llvm::Triple::arm:
2056  case llvm::Triple::armeb:
2057  if (Value == "-mthumb")
2058  // -mthumb has already been processed in ComputeLLVMTriple()
2059  // recognize but skip over here.
2060  continue;
2061  break;
2062  case llvm::Triple::mips:
2063  case llvm::Triple::mipsel:
2064  case llvm::Triple::mips64:
2065  case llvm::Triple::mips64el:
2066  if (Value == "--trap") {
2067  CmdArgs.push_back("-target-feature");
2068  CmdArgs.push_back("+use-tcc-in-div");
2069  continue;
2070  }
2071  if (Value == "--break") {
2072  CmdArgs.push_back("-target-feature");
2073  CmdArgs.push_back("-use-tcc-in-div");
2074  continue;
2075  }
2076  if (Value.startswith("-msoft-float")) {
2077  CmdArgs.push_back("-target-feature");
2078  CmdArgs.push_back("+soft-float");
2079  continue;
2080  }
2081  if (Value.startswith("-mhard-float")) {
2082  CmdArgs.push_back("-target-feature");
2083  CmdArgs.push_back("-soft-float");
2084  continue;
2085  }
2086 
2087  MipsTargetFeature = llvm::StringSwitch<const char *>(Value)
2088  .Case("-mips1", "+mips1")
2089  .Case("-mips2", "+mips2")
2090  .Case("-mips3", "+mips3")
2091  .Case("-mips4", "+mips4")
2092  .Case("-mips5", "+mips5")
2093  .Case("-mips32", "+mips32")
2094  .Case("-mips32r2", "+mips32r2")
2095  .Case("-mips32r3", "+mips32r3")
2096  .Case("-mips32r5", "+mips32r5")
2097  .Case("-mips32r6", "+mips32r6")
2098  .Case("-mips64", "+mips64")
2099  .Case("-mips64r2", "+mips64r2")
2100  .Case("-mips64r3", "+mips64r3")
2101  .Case("-mips64r5", "+mips64r5")
2102  .Case("-mips64r6", "+mips64r6")
2103  .Default(nullptr);
2104  if (MipsTargetFeature)
2105  continue;
2106  }
2107 
2108  if (Value == "-force_cpusubtype_ALL") {
2109  // Do nothing, this is the default and we don't support anything else.
2110  } else if (Value == "-L") {
2111  CmdArgs.push_back("-msave-temp-labels");
2112  } else if (Value == "--fatal-warnings") {
2113  CmdArgs.push_back("-massembler-fatal-warnings");
2114  } else if (Value == "--noexecstack") {
2115  CmdArgs.push_back("-mnoexecstack");
2116  } else if (Value.startswith("-compress-debug-sections") ||
2117  Value.startswith("--compress-debug-sections") ||
2118  Value == "-nocompress-debug-sections" ||
2119  Value == "--nocompress-debug-sections") {
2120  CmdArgs.push_back(Value.data());
2121  } else if (Value == "-mrelax-relocations=yes" ||
2122  Value == "--mrelax-relocations=yes") {
2123  UseRelaxRelocations = true;
2124  } else if (Value == "-mrelax-relocations=no" ||
2125  Value == "--mrelax-relocations=no") {
2126  UseRelaxRelocations = false;
2127  } else if (Value.startswith("-I")) {
2128  CmdArgs.push_back(Value.data());
2129  // We need to consume the next argument if the current arg is a plain
2130  // -I. The next arg will be the include directory.
2131  if (Value == "-I")
2132  TakeNextArg = true;
2133  } else if (Value.startswith("-gdwarf-")) {
2134  // "-gdwarf-N" options are not cc1as options.
2135  unsigned DwarfVersion = DwarfVersionNum(Value);
2136  if (DwarfVersion == 0) { // Send it onward, and let cc1as complain.
2137  CmdArgs.push_back(Value.data());
2138  } else {
2139  RenderDebugEnablingArgs(Args, CmdArgs,
2141  DwarfVersion, llvm::DebuggerKind::Default);
2142  }
2143  } else if (Value.startswith("-mcpu") || Value.startswith("-mfpu") ||
2144  Value.startswith("-mhwdiv") || Value.startswith("-march")) {
2145  // Do nothing, we'll validate it later.
2146  } else if (Value == "-defsym") {
2147  if (A->getNumValues() != 2) {
2148  D.Diag(diag::err_drv_defsym_invalid_format) << Value;
2149  break;
2150  }
2151  const char *S = A->getValue(1);
2152  auto Pair = StringRef(S).split('=');
2153  auto Sym = Pair.first;
2154  auto SVal = Pair.second;
2155 
2156  if (Sym.empty() || SVal.empty()) {
2157  D.Diag(diag::err_drv_defsym_invalid_format) << S;
2158  break;
2159  }
2160  int64_t IVal;
2161  if (SVal.getAsInteger(0, IVal)) {
2162  D.Diag(diag::err_drv_defsym_invalid_symval) << SVal;
2163  break;
2164  }
2165  CmdArgs.push_back(Value.data());
2166  TakeNextArg = true;
2167  } else if (Value == "-fdebug-compilation-dir") {
2168  CmdArgs.push_back("-fdebug-compilation-dir");
2169  TakeNextArg = true;
2170  } else {
2171  D.Diag(diag::err_drv_unsupported_option_argument)
2172  << A->getOption().getName() << Value;
2173  }
2174  }
2175  }
2176  if (UseRelaxRelocations)
2177  CmdArgs.push_back("--mrelax-relocations");
2178  if (MipsTargetFeature != nullptr) {
2179  CmdArgs.push_back("-target-feature");
2180  CmdArgs.push_back(MipsTargetFeature);
2181  }
2182 
2183  // forward -fembed-bitcode to assmebler
2184  if (C.getDriver().embedBitcodeEnabled() ||
2186  Args.AddLastArg(CmdArgs, options::OPT_fembed_bitcode_EQ);
2187 }
2188 
2189 static void RenderFloatingPointOptions(const ToolChain &TC, const Driver &D,
2190  bool OFastEnabled, const ArgList &Args,
2191  ArgStringList &CmdArgs) {
2192  // Handle various floating point optimization flags, mapping them to the
2193  // appropriate LLVM code generation flags. This is complicated by several
2194  // "umbrella" flags, so we do this by stepping through the flags incrementally
2195  // adjusting what we think is enabled/disabled, then at the end setting the
2196  // LLVM flags based on the final state.
2197  bool HonorINFs = true;
2198  bool HonorNaNs = true;
2199  // -fmath-errno is the default on some platforms, e.g. BSD-derived OSes.
2200  bool MathErrno = TC.IsMathErrnoDefault();
2201  bool AssociativeMath = false;
2202  bool ReciprocalMath = false;
2203  bool SignedZeros = true;
2204  bool TrappingMath = true;
2205  StringRef DenormalFPMath = "";
2206  StringRef FPContract = "";
2207 
2208  if (const Arg *A = Args.getLastArg(options::OPT_flimited_precision_EQ)) {
2209  CmdArgs.push_back("-mlimit-float-precision");
2210  CmdArgs.push_back(A->getValue());
2211  }
2212 
2213  for (const Arg *A : Args) {
2214  switch (A->getOption().getID()) {
2215  // If this isn't an FP option skip the claim below
2216  default: continue;
2217 
2218  // Options controlling individual features
2219  case options::OPT_fhonor_infinities: HonorINFs = true; break;
2220  case options::OPT_fno_honor_infinities: HonorINFs = false; break;
2221  case options::OPT_fhonor_nans: HonorNaNs = true; break;
2222  case options::OPT_fno_honor_nans: HonorNaNs = false; break;
2223  case options::OPT_fmath_errno: MathErrno = true; break;
2224  case options::OPT_fno_math_errno: MathErrno = false; break;
2225  case options::OPT_fassociative_math: AssociativeMath = true; break;
2226  case options::OPT_fno_associative_math: AssociativeMath = false; break;
2227  case options::OPT_freciprocal_math: ReciprocalMath = true; break;
2228  case options::OPT_fno_reciprocal_math: ReciprocalMath = false; break;
2229  case options::OPT_fsigned_zeros: SignedZeros = true; break;
2230  case options::OPT_fno_signed_zeros: SignedZeros = false; break;
2231  case options::OPT_ftrapping_math: TrappingMath = true; break;
2232  case options::OPT_fno_trapping_math: TrappingMath = false; break;
2233 
2234  case options::OPT_fdenormal_fp_math_EQ:
2235  DenormalFPMath = A->getValue();
2236  break;
2237 
2238  // Validate and pass through -fp-contract option.
2239  case options::OPT_ffp_contract: {
2240  StringRef Val = A->getValue();
2241  if (Val == "fast" || Val == "on" || Val == "off")
2242  FPContract = Val;
2243  else
2244  D.Diag(diag::err_drv_unsupported_option_argument)
2245  << A->getOption().getName() << Val;
2246  break;
2247  }
2248 
2249  case options::OPT_ffinite_math_only:
2250  HonorINFs = false;
2251  HonorNaNs = false;
2252  break;
2253  case options::OPT_fno_finite_math_only:
2254  HonorINFs = true;
2255  HonorNaNs = true;
2256  break;
2257 
2258  case options::OPT_funsafe_math_optimizations:
2259  AssociativeMath = true;
2260  ReciprocalMath = true;
2261  SignedZeros = false;
2262  TrappingMath = false;
2263  break;
2264  case options::OPT_fno_unsafe_math_optimizations:
2265  AssociativeMath = false;
2266  ReciprocalMath = false;
2267  SignedZeros = true;
2268  TrappingMath = true;
2269  // -fno_unsafe_math_optimizations restores default denormal handling
2270  DenormalFPMath = "";
2271  break;
2272 
2273  case options::OPT_Ofast:
2274  // If -Ofast is the optimization level, then -ffast-math should be enabled
2275  if (!OFastEnabled)
2276  continue;
2277  LLVM_FALLTHROUGH;
2278  case options::OPT_ffast_math:
2279  HonorINFs = false;
2280  HonorNaNs = false;
2281  MathErrno = false;
2282  AssociativeMath = true;
2283  ReciprocalMath = true;
2284  SignedZeros = false;
2285  TrappingMath = false;
2286  // If fast-math is set then set the fp-contract mode to fast.
2287  FPContract = "fast";
2288  break;
2289  case options::OPT_fno_fast_math:
2290  HonorINFs = true;
2291  HonorNaNs = true;
2292  // Turning on -ffast-math (with either flag) removes the need for
2293  // MathErrno. However, turning *off* -ffast-math merely restores the
2294  // toolchain default (which may be false).
2295  MathErrno = TC.IsMathErrnoDefault();
2296  AssociativeMath = false;
2297  ReciprocalMath = false;
2298  SignedZeros = true;
2299  TrappingMath = true;
2300  // -fno_fast_math restores default denormal and fpcontract handling
2301  DenormalFPMath = "";
2302  FPContract = "";
2303  break;
2304  }
2305 
2306  // If we handled this option claim it
2307  A->claim();
2308  }
2309 
2310  if (!HonorINFs)
2311  CmdArgs.push_back("-menable-no-infs");
2312 
2313  if (!HonorNaNs)
2314  CmdArgs.push_back("-menable-no-nans");
2315 
2316  if (MathErrno)
2317  CmdArgs.push_back("-fmath-errno");
2318 
2319  if (!MathErrno && AssociativeMath && ReciprocalMath && !SignedZeros &&
2320  !TrappingMath)
2321  CmdArgs.push_back("-menable-unsafe-fp-math");
2322 
2323  if (!SignedZeros)
2324  CmdArgs.push_back("-fno-signed-zeros");
2325 
2326  if (AssociativeMath && !SignedZeros && !TrappingMath)
2327  CmdArgs.push_back("-mreassociate");
2328 
2329  if (ReciprocalMath)
2330  CmdArgs.push_back("-freciprocal-math");
2331 
2332  if (!TrappingMath)
2333  CmdArgs.push_back("-fno-trapping-math");
2334 
2335  if (!DenormalFPMath.empty())
2336  CmdArgs.push_back(
2337  Args.MakeArgString("-fdenormal-fp-math=" + DenormalFPMath));
2338 
2339  if (!FPContract.empty())
2340  CmdArgs.push_back(Args.MakeArgString("-ffp-contract=" + FPContract));
2341 
2342  ParseMRecip(D, Args, CmdArgs);
2343 
2344  // -ffast-math enables the __FAST_MATH__ preprocessor macro, but check for the
2345  // individual features enabled by -ffast-math instead of the option itself as
2346  // that's consistent with gcc's behaviour.
2347  if (!HonorINFs && !HonorNaNs && !MathErrno && AssociativeMath &&
2348  ReciprocalMath && !SignedZeros && !TrappingMath)
2349  CmdArgs.push_back("-ffast-math");
2350 
2351  // Handle __FINITE_MATH_ONLY__ similarly.
2352  if (!HonorINFs && !HonorNaNs)
2353  CmdArgs.push_back("-ffinite-math-only");
2354 
2355  if (const Arg *A = Args.getLastArg(options::OPT_mfpmath_EQ)) {
2356  CmdArgs.push_back("-mfpmath");
2357  CmdArgs.push_back(A->getValue());
2358  }
2359 
2360  // Disable a codegen optimization for floating-point casts.
2361  if (Args.hasFlag(options::OPT_fno_strict_float_cast_overflow,
2362  options::OPT_fstrict_float_cast_overflow, false))
2363  CmdArgs.push_back("-fno-strict-float-cast-overflow");
2364 }
2365 
2366 static void RenderAnalyzerOptions(const ArgList &Args, ArgStringList &CmdArgs,
2367  const llvm::Triple &Triple,
2368  const InputInfo &Input) {
2369  // Enable region store model by default.
2370  CmdArgs.push_back("-analyzer-store=region");
2371 
2372  // Treat blocks as analysis entry points.
2373  CmdArgs.push_back("-analyzer-opt-analyze-nested-blocks");
2374 
2375  // Add default argument set.
2376  if (!Args.hasArg(options::OPT__analyzer_no_default_checks)) {
2377  CmdArgs.push_back("-analyzer-checker=core");
2378  CmdArgs.push_back("-analyzer-checker=apiModeling");
2379 
2380  if (!Triple.isWindowsMSVCEnvironment()) {
2381  CmdArgs.push_back("-analyzer-checker=unix");
2382  } else {
2383  // Enable "unix" checkers that also work on Windows.
2384  CmdArgs.push_back("-analyzer-checker=unix.API");
2385  CmdArgs.push_back("-analyzer-checker=unix.Malloc");
2386  CmdArgs.push_back("-analyzer-checker=unix.MallocSizeof");
2387  CmdArgs.push_back("-analyzer-checker=unix.MismatchedDeallocator");
2388  CmdArgs.push_back("-analyzer-checker=unix.cstring.BadSizeArg");
2389  CmdArgs.push_back("-analyzer-checker=unix.cstring.NullArg");
2390  }
2391 
2392  // Disable some unix checkers for PS4.
2393  if (Triple.isPS4CPU()) {
2394  CmdArgs.push_back("-analyzer-disable-checker=unix.API");
2395  CmdArgs.push_back("-analyzer-disable-checker=unix.Vfork");
2396  }
2397 
2398  if (Triple.isOSDarwin())
2399  CmdArgs.push_back("-analyzer-checker=osx");
2400 
2401  CmdArgs.push_back("-analyzer-checker=deadcode");
2402 
2403  if (types::isCXX(Input.getType()))
2404  CmdArgs.push_back("-analyzer-checker=cplusplus");
2405 
2406  if (!Triple.isPS4CPU()) {
2407  CmdArgs.push_back("-analyzer-checker=security.insecureAPI.UncheckedReturn");
2408  CmdArgs.push_back("-analyzer-checker=security.insecureAPI.getpw");
2409  CmdArgs.push_back("-analyzer-checker=security.insecureAPI.gets");
2410  CmdArgs.push_back("-analyzer-checker=security.insecureAPI.mktemp");
2411  CmdArgs.push_back("-analyzer-checker=security.insecureAPI.mkstemp");
2412  CmdArgs.push_back("-analyzer-checker=security.insecureAPI.vfork");
2413  }
2414 
2415  // Default nullability checks.
2416  CmdArgs.push_back("-analyzer-checker=nullability.NullPassedToNonnull");
2417  CmdArgs.push_back("-analyzer-checker=nullability.NullReturnedFromNonnull");
2418  }
2419 
2420  // Set the output format. The default is plist, for (lame) historical reasons.
2421  CmdArgs.push_back("-analyzer-output");
2422  if (Arg *A = Args.getLastArg(options::OPT__analyzer_output))
2423  CmdArgs.push_back(A->getValue());
2424  else
2425  CmdArgs.push_back("plist");
2426 
2427  // Disable the presentation of standard compiler warnings when using
2428  // --analyze. We only want to show static analyzer diagnostics or frontend
2429  // errors.
2430  CmdArgs.push_back("-w");
2431 
2432  // Add -Xanalyzer arguments when running as analyzer.
2433  Args.AddAllArgValues(CmdArgs, options::OPT_Xanalyzer);
2434 }
2435 
2436 static void RenderSSPOptions(const ToolChain &TC, const ArgList &Args,
2437  ArgStringList &CmdArgs, bool KernelOrKext) {
2438  const llvm::Triple &EffectiveTriple = TC.getEffectiveTriple();
2439 
2440  // NVPTX doesn't support stack protectors; from the compiler's perspective, it
2441  // doesn't even have a stack!
2442  if (EffectiveTriple.isNVPTX())
2443  return;
2444 
2445  // -stack-protector=0 is default.
2446  unsigned StackProtectorLevel = 0;
2447  unsigned DefaultStackProtectorLevel =
2448  TC.GetDefaultStackProtectorLevel(KernelOrKext);
2449 
2450  if (Arg *A = Args.getLastArg(options::OPT_fno_stack_protector,
2451  options::OPT_fstack_protector_all,
2452  options::OPT_fstack_protector_strong,
2453  options::OPT_fstack_protector)) {
2454  if (A->getOption().matches(options::OPT_fstack_protector))
2455  StackProtectorLevel =
2456  std::max<unsigned>(LangOptions::SSPOn, DefaultStackProtectorLevel);
2457  else if (A->getOption().matches(options::OPT_fstack_protector_strong))
2458  StackProtectorLevel = LangOptions::SSPStrong;
2459  else if (A->getOption().matches(options::OPT_fstack_protector_all))
2460  StackProtectorLevel = LangOptions::SSPReq;
2461  } else {
2462  StackProtectorLevel = DefaultStackProtectorLevel;
2463  }
2464 
2465  if (StackProtectorLevel) {
2466  CmdArgs.push_back("-stack-protector");
2467  CmdArgs.push_back(Args.MakeArgString(Twine(StackProtectorLevel)));
2468  }
2469 
2470  // --param ssp-buffer-size=
2471  for (const Arg *A : Args.filtered(options::OPT__param)) {
2472  StringRef Str(A->getValue());
2473  if (Str.startswith("ssp-buffer-size=")) {
2474  if (StackProtectorLevel) {
2475  CmdArgs.push_back("-stack-protector-buffer-size");
2476  // FIXME: Verify the argument is a valid integer.
2477  CmdArgs.push_back(Args.MakeArgString(Str.drop_front(16)));
2478  }
2479  A->claim();
2480  }
2481  }
2482 }
2483 
2485  const ToolChain &TC,
2486  const ArgList &Args,
2487  ArgStringList &CmdArgs) {
2488  auto DefaultTrivialAutoVarInit = TC.GetDefaultTrivialAutoVarInit();
2489  StringRef TrivialAutoVarInit = "";
2490 
2491  for (const Arg *A : Args) {
2492  switch (A->getOption().getID()) {
2493  default:
2494  continue;
2495  case options::OPT_ftrivial_auto_var_init: {
2496  A->claim();
2497  StringRef Val = A->getValue();
2498  if (Val == "uninitialized" || Val == "zero" || Val == "pattern")
2499  TrivialAutoVarInit = Val;
2500  else
2501  D.Diag(diag::err_drv_unsupported_option_argument)
2502  << A->getOption().getName() << Val;
2503  break;
2504  }
2505  }
2506  }
2507 
2508  if (TrivialAutoVarInit.empty())
2509  switch (DefaultTrivialAutoVarInit) {
2511  break;
2513  TrivialAutoVarInit = "pattern";
2514  break;
2516  TrivialAutoVarInit = "zero";
2517  break;
2518  }
2519 
2520  if (!TrivialAutoVarInit.empty()) {
2521  if (TrivialAutoVarInit == "zero" && !Args.hasArg(options::OPT_enable_trivial_var_init_zero))
2522  D.Diag(diag::err_drv_trivial_auto_var_init_zero_disabled);
2523  CmdArgs.push_back(
2524  Args.MakeArgString("-ftrivial-auto-var-init=" + TrivialAutoVarInit));
2525  }
2526 }
2527 
2528 static void RenderOpenCLOptions(const ArgList &Args, ArgStringList &CmdArgs) {
2529  const unsigned ForwardedArguments[] = {
2530  options::OPT_cl_opt_disable,
2531  options::OPT_cl_strict_aliasing,
2532  options::OPT_cl_single_precision_constant,
2533  options::OPT_cl_finite_math_only,
2534  options::OPT_cl_kernel_arg_info,
2535  options::OPT_cl_unsafe_math_optimizations,
2536  options::OPT_cl_fast_relaxed_math,
2537  options::OPT_cl_mad_enable,
2538  options::OPT_cl_no_signed_zeros,
2539  options::OPT_cl_denorms_are_zero,
2540  options::OPT_cl_fp32_correctly_rounded_divide_sqrt,
2541  options::OPT_cl_uniform_work_group_size
2542  };
2543 
2544  if (Arg *A = Args.getLastArg(options::OPT_cl_std_EQ)) {
2545  std::string CLStdStr = std::string("-cl-std=") + A->getValue();
2546  CmdArgs.push_back(Args.MakeArgString(CLStdStr));
2547  }
2548 
2549  for (const auto &Arg : ForwardedArguments)
2550  if (const auto *A = Args.getLastArg(Arg))
2551  CmdArgs.push_back(Args.MakeArgString(A->getOption().getPrefixedName()));
2552 }
2553 
2554 static void RenderARCMigrateToolOptions(const Driver &D, const ArgList &Args,
2555  ArgStringList &CmdArgs) {
2556  bool ARCMTEnabled = false;
2557  if (!Args.hasArg(options::OPT_fno_objc_arc, options::OPT_fobjc_arc)) {
2558  if (const Arg *A = Args.getLastArg(options::OPT_ccc_arcmt_check,
2559  options::OPT_ccc_arcmt_modify,
2560  options::OPT_ccc_arcmt_migrate)) {
2561  ARCMTEnabled = true;
2562  switch (A->getOption().getID()) {
2563  default: llvm_unreachable("missed a case");
2564  case options::OPT_ccc_arcmt_check:
2565  CmdArgs.push_back("-arcmt-check");
2566  break;
2567  case options::OPT_ccc_arcmt_modify:
2568  CmdArgs.push_back("-arcmt-modify");
2569  break;
2570  case options::OPT_ccc_arcmt_migrate:
2571  CmdArgs.push_back("-arcmt-migrate");
2572  CmdArgs.push_back("-mt-migrate-directory");
2573  CmdArgs.push_back(A->getValue());
2574 
2575  Args.AddLastArg(CmdArgs, options::OPT_arcmt_migrate_report_output);
2576  Args.AddLastArg(CmdArgs, options::OPT_arcmt_migrate_emit_arc_errors);
2577  break;
2578  }
2579  }
2580  } else {
2581  Args.ClaimAllArgs(options::OPT_ccc_arcmt_check);
2582  Args.ClaimAllArgs(options::OPT_ccc_arcmt_modify);
2583  Args.ClaimAllArgs(options::OPT_ccc_arcmt_migrate);
2584  }
2585 
2586  if (const Arg *A = Args.getLastArg(options::OPT_ccc_objcmt_migrate)) {
2587  if (ARCMTEnabled)
2588  D.Diag(diag::err_drv_argument_not_allowed_with)
2589  << A->getAsString(Args) << "-ccc-arcmt-migrate";
2590 
2591  CmdArgs.push_back("-mt-migrate-directory");
2592  CmdArgs.push_back(A->getValue());
2593 
2594  if (!Args.hasArg(options::OPT_objcmt_migrate_literals,
2595  options::OPT_objcmt_migrate_subscripting,
2596  options::OPT_objcmt_migrate_property)) {
2597  // None specified, means enable them all.
2598  CmdArgs.push_back("-objcmt-migrate-literals");
2599  CmdArgs.push_back("-objcmt-migrate-subscripting");
2600  CmdArgs.push_back("-objcmt-migrate-property");
2601  } else {
2602  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_literals);
2603  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_subscripting);
2604  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_property);
2605  }
2606  } else {
2607  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_literals);
2608  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_subscripting);
2609  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_property);
2610  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_all);
2611  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_readonly_property);
2612  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_readwrite_property);
2613  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_property_dot_syntax);
2614  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_annotation);
2615  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_instancetype);
2616  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_nsmacros);
2617  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_protocol_conformance);
2618  Args.AddLastArg(CmdArgs, options::OPT_objcmt_atomic_property);
2619  Args.AddLastArg(CmdArgs, options::OPT_objcmt_returns_innerpointer_property);
2620  Args.AddLastArg(CmdArgs, options::OPT_objcmt_ns_nonatomic_iosonly);
2621  Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_designated_init);
2622  Args.AddLastArg(CmdArgs, options::OPT_objcmt_whitelist_dir_path);
2623  }
2624 }
2625 
2626 static void RenderBuiltinOptions(const ToolChain &TC, const llvm::Triple &T,
2627  const ArgList &Args, ArgStringList &CmdArgs) {
2628  // -fbuiltin is default unless -mkernel is used.
2629  bool UseBuiltins =
2630  Args.hasFlag(options::OPT_fbuiltin, options::OPT_fno_builtin,
2631  !Args.hasArg(options::OPT_mkernel));
2632  if (!UseBuiltins)
2633  CmdArgs.push_back("-fno-builtin");
2634 
2635  // -ffreestanding implies -fno-builtin.
2636  if (Args.hasArg(options::OPT_ffreestanding))
2637  UseBuiltins = false;
2638 
2639  // Process the -fno-builtin-* options.
2640  for (const auto &Arg : Args) {
2641  const Option &O = Arg->getOption();
2642  if (!O.matches(options::OPT_fno_builtin_))
2643  continue;
2644 
2645  Arg->claim();
2646 
2647  // If -fno-builtin is specified, then there's no need to pass the option to
2648  // the frontend.
2649  if (!UseBuiltins)
2650  continue;
2651 
2652  StringRef FuncName = Arg->getValue();
2653  CmdArgs.push_back(Args.MakeArgString("-fno-builtin-" + FuncName));
2654  }
2655 
2656  // le32-specific flags:
2657  // -fno-math-builtin: clang should not convert math builtins to intrinsics
2658  // by default.
2659  if (TC.getArch() == llvm::Triple::le32)
2660  CmdArgs.push_back("-fno-math-builtin");
2661 }
2662 
2664  llvm::sys::path::system_temp_directory(/*erasedOnReboot=*/false, Result);
2665  llvm::sys::path::append(Result, "org.llvm.clang.");
2666  appendUserToPath(Result);
2667  llvm::sys::path::append(Result, "ModuleCache");
2668 }
2669 
2670 static void RenderModulesOptions(Compilation &C, const Driver &D,
2671  const ArgList &Args, const InputInfo &Input,
2672  const InputInfo &Output,
2673  ArgStringList &CmdArgs, bool &HaveModules) {
2674  // -fmodules enables the use of precompiled modules (off by default).
2675  // Users can pass -fno-cxx-modules to turn off modules support for
2676  // C++/Objective-C++ programs.
2677  bool HaveClangModules = false;
2678  if (Args.hasFlag(options::OPT_fmodules, options::OPT_fno_modules, false)) {
2679  bool AllowedInCXX = Args.hasFlag(options::OPT_fcxx_modules,
2680  options::OPT_fno_cxx_modules, true);
2681  if (AllowedInCXX || !types::isCXX(Input.getType())) {
2682  CmdArgs.push_back("-fmodules");
2683  HaveClangModules = true;
2684  }
2685  }
2686 
2687  HaveModules = HaveClangModules;
2688  if (Args.hasArg(options::OPT_fmodules_ts)) {
2689  CmdArgs.push_back("-fmodules-ts");
2690  HaveModules = true;
2691  }
2692 
2693  // -fmodule-maps enables implicit reading of module map files. By default,
2694  // this is enabled if we are using Clang's flavor of precompiled modules.
2695  if (Args.hasFlag(options::OPT_fimplicit_module_maps,
2696  options::OPT_fno_implicit_module_maps, HaveClangModules))
2697  CmdArgs.push_back("-fimplicit-module-maps");
2698 
2699  // -fmodules-decluse checks that modules used are declared so (off by default)
2700  if (Args.hasFlag(options::OPT_fmodules_decluse,
2701  options::OPT_fno_modules_decluse, false))
2702  CmdArgs.push_back("-fmodules-decluse");
2703 
2704  // -fmodules-strict-decluse is like -fmodule-decluse, but also checks that
2705  // all #included headers are part of modules.
2706  if (Args.hasFlag(options::OPT_fmodules_strict_decluse,
2707  options::OPT_fno_modules_strict_decluse, false))
2708  CmdArgs.push_back("-fmodules-strict-decluse");
2709 
2710  // -fno-implicit-modules turns off implicitly compiling modules on demand.
2711  bool ImplicitModules = false;
2712  if (!Args.hasFlag(options::OPT_fimplicit_modules,
2713  options::OPT_fno_implicit_modules, HaveClangModules)) {
2714  if (HaveModules)
2715  CmdArgs.push_back("-fno-implicit-modules");
2716  } else if (HaveModules) {
2717  ImplicitModules = true;
2718  // -fmodule-cache-path specifies where our implicitly-built module files
2719  // should be written.
2720  SmallString<128> Path;
2721  if (Arg *A = Args.getLastArg(options::OPT_fmodules_cache_path))
2722  Path = A->getValue();
2723 
2724  if (C.isForDiagnostics()) {
2725  // When generating crash reports, we want to emit the modules along with
2726  // the reproduction sources, so we ignore any provided module path.
2727  Path = Output.getFilename();
2728  llvm::sys::path::replace_extension(Path, ".cache");
2729  llvm::sys::path::append(Path, "modules");
2730  } else if (Path.empty()) {
2731  // No module path was provided: use the default.
2733  }
2734 
2735  const char Arg[] = "-fmodules-cache-path=";
2736  Path.insert(Path.begin(), Arg, Arg + strlen(Arg));
2737  CmdArgs.push_back(Args.MakeArgString(Path));
2738  }
2739 
2740  if (HaveModules) {
2741  // -fprebuilt-module-path specifies where to load the prebuilt module files.
2742  for (const Arg *A : Args.filtered(options::OPT_fprebuilt_module_path)) {
2743  CmdArgs.push_back(Args.MakeArgString(
2744  std::string("-fprebuilt-module-path=") + A->getValue()));
2745  A->claim();
2746  }
2747  }
2748 
2749  // -fmodule-name specifies the module that is currently being built (or
2750  // used for header checking by -fmodule-maps).
2751  Args.AddLastArg(CmdArgs, options::OPT_fmodule_name_EQ);
2752 
2753  // -fmodule-map-file can be used to specify files containing module
2754  // definitions.
2755  Args.AddAllArgs(CmdArgs, options::OPT_fmodule_map_file);
2756 
2757  // -fbuiltin-module-map can be used to load the clang
2758  // builtin headers modulemap file.
2759  if (Args.hasArg(options::OPT_fbuiltin_module_map)) {
2760  SmallString<128> BuiltinModuleMap(D.ResourceDir);
2761  llvm::sys::path::append(BuiltinModuleMap, "include");
2762  llvm::sys::path::append(BuiltinModuleMap, "module.modulemap");
2763  if (llvm::sys::fs::exists(BuiltinModuleMap))
2764  CmdArgs.push_back(
2765  Args.MakeArgString("-fmodule-map-file=" + BuiltinModuleMap));
2766  }
2767 
2768  // The -fmodule-file=<name>=<file> form specifies the mapping of module
2769  // names to precompiled module files (the module is loaded only if used).
2770  // The -fmodule-file=<file> form can be used to unconditionally load
2771  // precompiled module files (whether used or not).
2772  if (HaveModules)
2773  Args.AddAllArgs(CmdArgs, options::OPT_fmodule_file);
2774  else
2775  Args.ClaimAllArgs(options::OPT_fmodule_file);
2776 
2777  // When building modules and generating crashdumps, we need to dump a module
2778  // dependency VFS alongside the output.
2779  if (HaveClangModules && C.isForDiagnostics()) {
2780  SmallString<128> VFSDir(Output.getFilename());
2781  llvm::sys::path::replace_extension(VFSDir, ".cache");
2782  // Add the cache directory as a temp so the crash diagnostics pick it up.
2783  C.addTempFile(Args.MakeArgString(VFSDir));
2784 
2785  llvm::sys::path::append(VFSDir, "vfs");
2786  CmdArgs.push_back("-module-dependency-dir");
2787  CmdArgs.push_back(Args.MakeArgString(VFSDir));
2788  }
2789 
2790  if (HaveClangModules)
2791  Args.AddLastArg(CmdArgs, options::OPT_fmodules_user_build_path);
2792 
2793  // Pass through all -fmodules-ignore-macro arguments.
2794  Args.AddAllArgs(CmdArgs, options::OPT_fmodules_ignore_macro);
2795  Args.AddLastArg(CmdArgs, options::OPT_fmodules_prune_interval);
2796  Args.AddLastArg(CmdArgs, options::OPT_fmodules_prune_after);
2797 
2798  Args.AddLastArg(CmdArgs, options::OPT_fbuild_session_timestamp);
2799 
2800  if (Arg *A = Args.getLastArg(options::OPT_fbuild_session_file)) {
2801  if (Args.hasArg(options::OPT_fbuild_session_timestamp))
2802  D.Diag(diag::err_drv_argument_not_allowed_with)
2803  << A->getAsString(Args) << "-fbuild-session-timestamp";
2804 
2805  llvm::sys::fs::file_status Status;
2806  if (llvm::sys::fs::status(A->getValue(), Status))
2807  D.Diag(diag::err_drv_no_such_file) << A->getValue();
2808  CmdArgs.push_back(
2809  Args.MakeArgString("-fbuild-session-timestamp=" +
2810  Twine((uint64_t)Status.getLastModificationTime()
2811  .time_since_epoch()
2812  .count())));
2813  }
2814 
2815  if (Args.getLastArg(options::OPT_fmodules_validate_once_per_build_session)) {
2816  if (!Args.getLastArg(options::OPT_fbuild_session_timestamp,
2817  options::OPT_fbuild_session_file))
2818  D.Diag(diag::err_drv_modules_validate_once_requires_timestamp);
2819 
2820  Args.AddLastArg(CmdArgs,
2821  options::OPT_fmodules_validate_once_per_build_session);
2822  }
2823 
2824  if (Args.hasFlag(options::OPT_fmodules_validate_system_headers,
2825  options::OPT_fno_modules_validate_system_headers,
2826  ImplicitModules))
2827  CmdArgs.push_back("-fmodules-validate-system-headers");
2828 
2829  Args.AddLastArg(CmdArgs, options::OPT_fmodules_disable_diagnostic_validation);
2830 }
2831 
2832 static void RenderCharacterOptions(const ArgList &Args, const llvm::Triple &T,
2833  ArgStringList &CmdArgs) {
2834  // -fsigned-char is default.
2835  if (const Arg *A = Args.getLastArg(options::OPT_fsigned_char,
2836  options::OPT_fno_signed_char,
2837  options::OPT_funsigned_char,
2838  options::OPT_fno_unsigned_char)) {
2839  if (A->getOption().matches(options::OPT_funsigned_char) ||
2840  A->getOption().matches(options::OPT_fno_signed_char)) {
2841  CmdArgs.push_back("-fno-signed-char");
2842  }
2843  } else if (!isSignedCharDefault(T)) {
2844  CmdArgs.push_back("-fno-signed-char");
2845  }
2846 
2847  // The default depends on the language standard.
2848  if (const Arg *A =
2849  Args.getLastArg(options::OPT_fchar8__t, options::OPT_fno_char8__t))
2850  A->render(Args, CmdArgs);
2851 
2852  if (const Arg *A = Args.getLastArg(options::OPT_fshort_wchar,
2853  options::OPT_fno_short_wchar)) {
2854  if (A->getOption().matches(options::OPT_fshort_wchar)) {
2855  CmdArgs.push_back("-fwchar-type=short");
2856  CmdArgs.push_back("-fno-signed-wchar");
2857  } else {
2858  bool IsARM = T.isARM() || T.isThumb() || T.isAArch64();
2859  CmdArgs.push_back("-fwchar-type=int");
2860  if (IsARM && !(T.isOSWindows() || T.isOSNetBSD() ||
2861  T.isOSOpenBSD()))
2862  CmdArgs.push_back("-fno-signed-wchar");
2863  else
2864  CmdArgs.push_back("-fsigned-wchar");
2865  }
2866  }
2867 }
2868 
2869 static void RenderObjCOptions(const ToolChain &TC, const Driver &D,
2870  const llvm::Triple &T, const ArgList &Args,
2871  ObjCRuntime &Runtime, bool InferCovariantReturns,
2872  const InputInfo &Input, ArgStringList &CmdArgs) {
2873  const llvm::Triple::ArchType Arch = TC.getArch();
2874 
2875  // -fobjc-dispatch-method is only relevant with the nonfragile-abi, and legacy
2876  // is the default. Except for deployment target of 10.5, next runtime is
2877  // always legacy dispatch and -fno-objc-legacy-dispatch gets ignored silently.
2878  if (Runtime.isNonFragile()) {
2879  if (!Args.hasFlag(options::OPT_fobjc_legacy_dispatch,
2880  options::OPT_fno_objc_legacy_dispatch,
2881  Runtime.isLegacyDispatchDefaultForArch(Arch))) {
2882  if (TC.UseObjCMixedDispatch())
2883  CmdArgs.push_back("-fobjc-dispatch-method=mixed");
2884  else
2885  CmdArgs.push_back("-fobjc-dispatch-method=non-legacy");
2886  }
2887  }
2888 
2889  // When ObjectiveC legacy runtime is in effect on MacOSX, turn on the option
2890  // to do Array/Dictionary subscripting by default.
2891  if (Arch == llvm::Triple::x86 && T.isMacOSX() &&
2892  Runtime.getKind() == ObjCRuntime::FragileMacOSX && Runtime.isNeXTFamily())
2893  CmdArgs.push_back("-fobjc-subscripting-legacy-runtime");
2894 
2895  // Allow -fno-objc-arr to trump -fobjc-arr/-fobjc-arc.
2896  // NOTE: This logic is duplicated in ToolChains.cpp.
2897  if (isObjCAutoRefCount(Args)) {
2898  TC.CheckObjCARC();
2899 
2900  CmdArgs.push_back("-fobjc-arc");
2901 
2902  // FIXME: It seems like this entire block, and several around it should be
2903  // wrapped in isObjC, but for now we just use it here as this is where it
2904  // was being used previously.
2905  if (types::isCXX(Input.getType()) && types::isObjC(Input.getType())) {
2906  if (TC.GetCXXStdlibType(Args) == ToolChain::CST_Libcxx)
2907  CmdArgs.push_back("-fobjc-arc-cxxlib=libc++");
2908  else
2909  CmdArgs.push_back("-fobjc-arc-cxxlib=libstdc++");
2910  }
2911 
2912  // Allow the user to enable full exceptions code emission.
2913  // We default off for Objective-C, on for Objective-C++.
2914  if (Args.hasFlag(options::OPT_fobjc_arc_exceptions,
2915  options::OPT_fno_objc_arc_exceptions,
2916  /*default=*/types::isCXX(Input.getType())))
2917  CmdArgs.push_back("-fobjc-arc-exceptions");
2918  }
2919 
2920  // Silence warning for full exception code emission options when explicitly
2921  // set to use no ARC.
2922  if (Args.hasArg(options::OPT_fno_objc_arc)) {
2923  Args.ClaimAllArgs(options::OPT_fobjc_arc_exceptions);
2924  Args.ClaimAllArgs(options::OPT_fno_objc_arc_exceptions);
2925  }
2926 
2927  // Allow the user to control whether messages can be converted to runtime
2928  // functions.
2929  if (types::isObjC(Input.getType())) {
2930  auto *Arg = Args.getLastArg(
2931  options::OPT_fobjc_convert_messages_to_runtime_calls,
2932  options::OPT_fno_objc_convert_messages_to_runtime_calls);
2933  if (Arg &&
2934  Arg->getOption().matches(
2935  options::OPT_fno_objc_convert_messages_to_runtime_calls))
2936  CmdArgs.push_back("-fno-objc-convert-messages-to-runtime-calls");
2937  }
2938 
2939  // -fobjc-infer-related-result-type is the default, except in the Objective-C
2940  // rewriter.
2941  if (InferCovariantReturns)
2942  CmdArgs.push_back("-fno-objc-infer-related-result-type");
2943 
2944  // Pass down -fobjc-weak or -fno-objc-weak if present.
2945  if (types::isObjC(Input.getType())) {
2946  auto WeakArg =
2947  Args.getLastArg(options::OPT_fobjc_weak, options::OPT_fno_objc_weak);
2948  if (!WeakArg) {
2949  // nothing to do
2950  } else if (!Runtime.allowsWeak()) {
2951  if (WeakArg->getOption().matches(options::OPT_fobjc_weak))
2952  D.Diag(diag::err_objc_weak_unsupported);
2953  } else {
2954  WeakArg->render(Args, CmdArgs);
2955  }
2956  }
2957 }
2958 
2959 static void RenderDiagnosticsOptions(const Driver &D, const ArgList &Args,
2960  ArgStringList &CmdArgs) {
2961  bool CaretDefault = true;
2962  bool ColumnDefault = true;
2963 
2964  if (const Arg *A = Args.getLastArg(options::OPT__SLASH_diagnostics_classic,
2965  options::OPT__SLASH_diagnostics_column,
2966  options::OPT__SLASH_diagnostics_caret)) {
2967  switch (A->getOption().getID()) {
2968  case options::OPT__SLASH_diagnostics_caret:
2969  CaretDefault = true;
2970  ColumnDefault = true;
2971  break;
2972  case options::OPT__SLASH_diagnostics_column:
2973  CaretDefault = false;
2974  ColumnDefault = true;
2975  break;
2976  case options::OPT__SLASH_diagnostics_classic:
2977  CaretDefault = false;
2978  ColumnDefault = false;
2979  break;
2980  }
2981  }
2982 
2983  // -fcaret-diagnostics is default.
2984  if (!Args.hasFlag(options::OPT_fcaret_diagnostics,
2985  options::OPT_fno_caret_diagnostics, CaretDefault))
2986  CmdArgs.push_back("-fno-caret-diagnostics");
2987 
2988  // -fdiagnostics-fixit-info is default, only pass non-default.
2989  if (!Args.hasFlag(options::OPT_fdiagnostics_fixit_info,
2990  options::OPT_fno_diagnostics_fixit_info))
2991  CmdArgs.push_back("-fno-diagnostics-fixit-info");
2992 
2993  // Enable -fdiagnostics-show-option by default.
2994  if (Args.hasFlag(options::OPT_fdiagnostics_show_option,
2995  options::OPT_fno_diagnostics_show_option))
2996  CmdArgs.push_back("-fdiagnostics-show-option");
2997 
2998  if (const Arg *A =
2999  Args.getLastArg(options::OPT_fdiagnostics_show_category_EQ)) {
3000  CmdArgs.push_back("-fdiagnostics-show-category");
3001  CmdArgs.push_back(A->getValue());
3002  }
3003 
3004  if (Args.hasFlag(options::OPT_fdiagnostics_show_hotness,
3005  options::OPT_fno_diagnostics_show_hotness, false))
3006  CmdArgs.push_back("-fdiagnostics-show-hotness");
3007 
3008  if (const Arg *A =
3009  Args.getLastArg(options::OPT_fdiagnostics_hotness_threshold_EQ)) {
3010  std::string Opt =
3011  std::string("-fdiagnostics-hotness-threshold=") + A->getValue();
3012  CmdArgs.push_back(Args.MakeArgString(Opt));
3013  }
3014 
3015  if (const Arg *A = Args.getLastArg(options::OPT_fdiagnostics_format_EQ)) {
3016  CmdArgs.push_back("-fdiagnostics-format");
3017  CmdArgs.push_back(A->getValue());
3018  }
3019 
3020  if (const Arg *A = Args.getLastArg(
3021  options::OPT_fdiagnostics_show_note_include_stack,
3022  options::OPT_fno_diagnostics_show_note_include_stack)) {
3023  const Option &O = A->getOption();
3024  if (O.matches(options::OPT_fdiagnostics_show_note_include_stack))
3025  CmdArgs.push_back("-fdiagnostics-show-note-include-stack");
3026  else
3027  CmdArgs.push_back("-fno-diagnostics-show-note-include-stack");
3028  }
3029 
3030  // Color diagnostics are parsed by the driver directly from argv and later
3031  // re-parsed to construct this job; claim any possible color diagnostic here
3032  // to avoid warn_drv_unused_argument and diagnose bad
3033  // OPT_fdiagnostics_color_EQ values.
3034  for (const Arg *A : Args) {
3035  const Option &O = A->getOption();
3036  if (!O.matches(options::OPT_fcolor_diagnostics) &&
3037  !O.matches(options::OPT_fdiagnostics_color) &&
3038  !O.matches(options::OPT_fno_color_diagnostics) &&
3039  !O.matches(options::OPT_fno_diagnostics_color) &&
3040  !O.matches(options::OPT_fdiagnostics_color_EQ))
3041  continue;
3042 
3043  if (O.matches(options::OPT_fdiagnostics_color_EQ)) {
3044  StringRef Value(A->getValue());
3045  if (Value != "always" && Value != "never" && Value != "auto")
3046  D.Diag(diag::err_drv_clang_unsupported)
3047  << ("-fdiagnostics-color=" + Value).str();
3048  }
3049  A->claim();
3050  }
3051 
3052  if (D.getDiags().getDiagnosticOptions().ShowColors)
3053  CmdArgs.push_back("-fcolor-diagnostics");
3054 
3055  if (Args.hasArg(options::OPT_fansi_escape_codes))
3056  CmdArgs.push_back("-fansi-escape-codes");
3057 
3058  if (!Args.hasFlag(options::OPT_fshow_source_location,
3059  options::OPT_fno_show_source_location))
3060  CmdArgs.push_back("-fno-show-source-location");
3061 
3062  if (Args.hasArg(options::OPT_fdiagnostics_absolute_paths))
3063  CmdArgs.push_back("-fdiagnostics-absolute-paths");
3064 
3065  if (!Args.hasFlag(options::OPT_fshow_column, options::OPT_fno_show_column,
3066  ColumnDefault))
3067  CmdArgs.push_back("-fno-show-column");
3068 
3069  if (!Args.hasFlag(options::OPT_fspell_checking,
3070  options::OPT_fno_spell_checking))
3071  CmdArgs.push_back("-fno-spell-checking");
3072 }
3073 
3074 enum class DwarfFissionKind { None, Split, Single };
3075 
3077  const ArgList &Args, Arg *&Arg) {
3078  Arg =
3079  Args.getLastArg(options::OPT_gsplit_dwarf, options::OPT_gsplit_dwarf_EQ);
3080  if (!Arg)
3081  return DwarfFissionKind::None;
3082 
3083  if (Arg->getOption().matches(options::OPT_gsplit_dwarf))
3084  return DwarfFissionKind::Split;
3085 
3086  StringRef Value = Arg->getValue();
3087  if (Value == "split")
3088  return DwarfFissionKind::Split;
3089  if (Value == "single")
3090  return DwarfFissionKind::Single;
3091 
3092  D.Diag(diag::err_drv_unsupported_option_argument)
3093  << Arg->getOption().getName() << Arg->getValue();
3094  return DwarfFissionKind::None;
3095 }
3096 
3097 static void RenderDebugOptions(const ToolChain &TC, const Driver &D,
3098  const llvm::Triple &T, const ArgList &Args,
3099  bool EmitCodeView, bool IsWindowsMSVC,
3100  ArgStringList &CmdArgs,
3102  DwarfFissionKind &DwarfFission) {
3103  if (Args.hasFlag(options::OPT_fdebug_info_for_profiling,
3104  options::OPT_fno_debug_info_for_profiling, false) &&
3106  Args.getLastArg(options::OPT_fdebug_info_for_profiling), Args, D, TC))
3107  CmdArgs.push_back("-fdebug-info-for-profiling");
3108 
3109  // The 'g' groups options involve a somewhat intricate sequence of decisions
3110  // about what to pass from the driver to the frontend, but by the time they
3111  // reach cc1 they've been factored into three well-defined orthogonal choices:
3112  // * what level of debug info to generate
3113  // * what dwarf version to write
3114  // * what debugger tuning to use
3115  // This avoids having to monkey around further in cc1 other than to disable
3116  // codeview if not running in a Windows environment. Perhaps even that
3117  // decision should be made in the driver as well though.
3118  unsigned DWARFVersion = 0;
3119  llvm::DebuggerKind DebuggerTuning = TC.getDefaultDebuggerTuning();
3120 
3121  bool SplitDWARFInlining =
3122  Args.hasFlag(options::OPT_fsplit_dwarf_inlining,
3123  options::OPT_fno_split_dwarf_inlining, true);
3124 
3125  Args.ClaimAllArgs(options::OPT_g_Group);
3126 
3127  Arg* SplitDWARFArg;
3128  DwarfFission = getDebugFissionKind(D, Args, SplitDWARFArg);
3129 
3130  if (DwarfFission != DwarfFissionKind::None &&
3131  !checkDebugInfoOption(SplitDWARFArg, Args, D, TC)) {
3132  DwarfFission = DwarfFissionKind::None;
3133  SplitDWARFInlining = false;
3134  }
3135 
3136  if (const Arg *A = Args.getLastArg(options::OPT_g_Group)) {
3137  if (checkDebugInfoOption(A, Args, D, TC)) {
3138  // If the last option explicitly specified a debug-info level, use it.
3139  if (A->getOption().matches(options::OPT_gN_Group)) {
3140  DebugInfoKind = DebugLevelToInfoKind(*A);
3141  // If you say "-gsplit-dwarf -gline-tables-only", -gsplit-dwarf loses.
3142  // But -gsplit-dwarf is not a g_group option, hence we have to check the
3143  // order explicitly. If -gsplit-dwarf wins, we fix DebugInfoKind later.
3144  // This gets a bit more complicated if you've disabled inline info in
3145  // the skeleton CUs (SplitDWARFInlining) - then there's value in
3146  // composing split-dwarf and line-tables-only, so let those compose
3147  // naturally in that case. And if you just turned off debug info,
3148  // (-gsplit-dwarf -g0) - do that.
3149  if (DwarfFission != DwarfFissionKind::None) {
3150  if (A->getIndex() > SplitDWARFArg->getIndex()) {
3151  if (DebugInfoKind == codegenoptions::NoDebugInfo ||
3152  DebugInfoKind == codegenoptions::DebugDirectivesOnly ||
3153  (DebugInfoKind == codegenoptions::DebugLineTablesOnly &&
3154  SplitDWARFInlining))
3155  DwarfFission = DwarfFissionKind::None;
3156  } else if (SplitDWARFInlining)
3157  DebugInfoKind = codegenoptions::NoDebugInfo;
3158  }
3159  } else {
3160  // For any other 'g' option, use Limited.
3161  DebugInfoKind = codegenoptions::LimitedDebugInfo;
3162  }
3163  } else {
3164  DebugInfoKind = codegenoptions::LimitedDebugInfo;
3165  }
3166  }
3167 
3168  // If a debugger tuning argument appeared, remember it.
3169  if (const Arg *A =
3170  Args.getLastArg(options::OPT_gTune_Group, options::OPT_ggdbN_Group)) {
3171  if (checkDebugInfoOption(A, Args, D, TC)) {
3172  if (A->getOption().matches(options::OPT_glldb))
3173  DebuggerTuning = llvm::DebuggerKind::LLDB;
3174  else if (A->getOption().matches(options::OPT_gsce))
3175  DebuggerTuning = llvm::DebuggerKind::SCE;
3176  else
3177  DebuggerTuning = llvm::DebuggerKind::GDB;
3178  }
3179  }
3180 
3181  // If a -gdwarf argument appeared, remember it.
3182  if (const Arg *A =
3183  Args.getLastArg(options::OPT_gdwarf_2, options::OPT_gdwarf_3,
3184  options::OPT_gdwarf_4, options::OPT_gdwarf_5))
3185  if (checkDebugInfoOption(A, Args, D, TC))
3186  DWARFVersion = DwarfVersionNum(A->getSpelling());
3187 
3188  if (const Arg *A = Args.getLastArg(options::OPT_gcodeview)) {
3189  if (checkDebugInfoOption(A, Args, D, TC))
3190  EmitCodeView = true;
3191  }
3192 
3193  // If the user asked for debug info but did not explicitly specify -gcodeview
3194  // or -gdwarf, ask the toolchain for the default format.
3195  if (!EmitCodeView && DWARFVersion == 0 &&
3196  DebugInfoKind != codegenoptions::NoDebugInfo) {
3197  switch (TC.getDefaultDebugFormat()) {
3199  EmitCodeView = true;
3200  break;
3202  DWARFVersion = TC.GetDefaultDwarfVersion();
3203  break;
3204  }
3205  }
3206 
3207  // -gline-directives-only supported only for the DWARF debug info.
3208  if (DWARFVersion == 0 && DebugInfoKind == codegenoptions::DebugDirectivesOnly)
3209  DebugInfoKind = codegenoptions::NoDebugInfo;
3210 
3211  // We ignore flag -gstrict-dwarf for now.
3212  // And we handle flag -grecord-gcc-switches later with DWARFDebugFlags.
3213  Args.ClaimAllArgs(options::OPT_g_flags_Group);
3214 
3215  // Column info is included by default for everything except SCE and
3216  // CodeView. Clang doesn't track end columns, just starting columns, which,
3217  // in theory, is fine for CodeView (and PDB). In practice, however, the
3218  // Microsoft debuggers don't handle missing end columns well, so it's better
3219  // not to include any column info.
3220  if (const Arg *A = Args.getLastArg(options::OPT_gcolumn_info))
3221  (void)checkDebugInfoOption(A, Args, D, TC);
3222  if (Args.hasFlag(options::OPT_gcolumn_info, options::OPT_gno_column_info,
3223  /*Default=*/!EmitCodeView &&
3224  DebuggerTuning != llvm::DebuggerKind::SCE))
3225  CmdArgs.push_back("-dwarf-column-info");
3226 
3227  // FIXME: Move backend command line options to the module.
3228  // If -gline-tables-only or -gline-directives-only is the last option it wins.
3229  if (const Arg *A = Args.getLastArg(options::OPT_gmodules))
3230  if (checkDebugInfoOption(A, Args, D, TC)) {
3231  if (DebugInfoKind != codegenoptions::DebugLineTablesOnly &&
3232  DebugInfoKind != codegenoptions::DebugDirectivesOnly) {
3233  DebugInfoKind = codegenoptions::LimitedDebugInfo;
3234  CmdArgs.push_back("-dwarf-ext-refs");
3235  CmdArgs.push_back("-fmodule-format=obj");
3236  }
3237  }
3238 
3239  // -gsplit-dwarf should turn on -g and enable the backend dwarf
3240  // splitting and extraction.
3241  // FIXME: Currently only works on Linux and Fuchsia.
3242  if (T.isOSLinux() || T.isOSFuchsia()) {
3243  if (!SplitDWARFInlining)
3244  CmdArgs.push_back("-fno-split-dwarf-inlining");
3245 
3246  if (DwarfFission != DwarfFissionKind::None) {
3247  if (DebugInfoKind == codegenoptions::NoDebugInfo)
3248  DebugInfoKind = codegenoptions::LimitedDebugInfo;
3249 
3250  if (DwarfFission == DwarfFissionKind::Single)
3251  CmdArgs.push_back("-enable-split-dwarf=single");
3252  else
3253  CmdArgs.push_back("-enable-split-dwarf");
3254  }
3255  }
3256 
3257  // After we've dealt with all combinations of things that could
3258  // make DebugInfoKind be other than None or DebugLineTablesOnly,
3259  // figure out if we need to "upgrade" it to standalone debug info.
3260  // We parse these two '-f' options whether or not they will be used,
3261  // to claim them even if you wrote "-fstandalone-debug -gline-tables-only"
3262  bool NeedFullDebug = Args.hasFlag(options::OPT_fstandalone_debug,
3263  options::OPT_fno_standalone_debug,
3265  if (const Arg *A = Args.getLastArg(options::OPT_fstandalone_debug))
3266  (void)checkDebugInfoOption(A, Args, D, TC);
3267  if (DebugInfoKind == codegenoptions::LimitedDebugInfo && NeedFullDebug)
3268  DebugInfoKind = codegenoptions::FullDebugInfo;
3269 
3270  if (Args.hasFlag(options::OPT_gembed_source, options::OPT_gno_embed_source,
3271  false)) {
3272  // Source embedding is a vendor extension to DWARF v5. By now we have
3273  // checked if a DWARF version was stated explicitly, and have otherwise
3274  // fallen back to the target default, so if this is still not at least 5
3275  // we emit an error.
3276  const Arg *A = Args.getLastArg(options::OPT_gembed_source);
3277  if (DWARFVersion < 5)
3278  D.Diag(diag::err_drv_argument_only_allowed_with)
3279  << A->getAsString(Args) << "-gdwarf-5";
3280  else if (checkDebugInfoOption(A, Args, D, TC))
3281  CmdArgs.push_back("-gembed-source");
3282  }
3283 
3284  if (EmitCodeView) {
3285  CmdArgs.push_back("-gcodeview");
3286 
3287  // Emit codeview type hashes if requested.
3288  if (Args.hasFlag(options::OPT_gcodeview_ghash,
3289  options::OPT_gno_codeview_ghash, false)) {
3290  CmdArgs.push_back("-gcodeview-ghash");
3291  }
3292  }
3293 
3294  // Adjust the debug info kind for the given toolchain.
3295  TC.adjustDebugInfoKind(DebugInfoKind, Args);
3296 
3297  RenderDebugEnablingArgs(Args, CmdArgs, DebugInfoKind, DWARFVersion,
3298  DebuggerTuning);
3299 
3300  // -fdebug-macro turns on macro debug info generation.
3301  if (Args.hasFlag(options::OPT_fdebug_macro, options::OPT_fno_debug_macro,
3302  false))
3303  if (checkDebugInfoOption(Args.getLastArg(options::OPT_fdebug_macro), Args,
3304  D, TC))
3305  CmdArgs.push_back("-debug-info-macro");
3306 
3307  // -ggnu-pubnames turns on gnu style pubnames in the backend.
3308  const auto *PubnamesArg =
3309  Args.getLastArg(options::OPT_ggnu_pubnames, options::OPT_gno_gnu_pubnames,
3310  options::OPT_gpubnames, options::OPT_gno_pubnames);
3311  if (DwarfFission != DwarfFissionKind::None ||
3312  DebuggerTuning == llvm::DebuggerKind::LLDB ||
3313  (PubnamesArg && checkDebugInfoOption(PubnamesArg, Args, D, TC)))
3314  if (!PubnamesArg ||
3315  (!PubnamesArg->getOption().matches(options::OPT_gno_gnu_pubnames) &&
3316  !PubnamesArg->getOption().matches(options::OPT_gno_pubnames)))
3317  CmdArgs.push_back(PubnamesArg && PubnamesArg->getOption().matches(
3318  options::OPT_gpubnames)
3319  ? "-gpubnames"
3320  : "-ggnu-pubnames");
3321 
3322  if (Args.hasFlag(options::OPT_fdebug_ranges_base_address,
3323  options::OPT_fno_debug_ranges_base_address, false)) {
3324  CmdArgs.push_back("-fdebug-ranges-base-address");
3325  }
3326 
3327  // -gdwarf-aranges turns on the emission of the aranges section in the
3328  // backend.
3329  // Always enabled for SCE tuning.
3330  bool NeedAranges = DebuggerTuning == llvm::DebuggerKind::SCE;
3331  if (const Arg *A = Args.getLastArg(options::OPT_gdwarf_aranges))
3332  NeedAranges = checkDebugInfoOption(A, Args, D, TC) || NeedAranges;
3333  if (NeedAranges) {
3334  CmdArgs.push_back("-mllvm");
3335  CmdArgs.push_back("-generate-arange-section");
3336  }
3337 
3338  if (Args.hasFlag(options::OPT_fdebug_types_section,
3339  options::OPT_fno_debug_types_section, false)) {
3340  if (!T.isOSBinFormatELF()) {
3341  D.Diag(diag::err_drv_unsupported_opt_for_target)
3342  << Args.getLastArg(options::OPT_fdebug_types_section)
3343  ->getAsString(Args)
3344  << T.getTriple();
3345  } else if (checkDebugInfoOption(
3346  Args.getLastArg(options::OPT_fdebug_types_section), Args, D,
3347  TC)) {
3348  CmdArgs.push_back("-mllvm");
3349  CmdArgs.push_back("-generate-type-units");
3350  }
3351  }
3352 
3353  // Decide how to render forward declarations of template instantiations.
3354  // SCE wants full descriptions, others just get them in the name.
3355  if (DebuggerTuning == llvm::DebuggerKind::SCE)
3356  CmdArgs.push_back("-debug-forward-template-params");
3357 
3358  // Do we need to explicitly import anonymous namespaces into the parent
3359  // scope?
3360  if (DebuggerTuning == llvm::DebuggerKind::SCE)
3361  CmdArgs.push_back("-dwarf-explicit-import");
3362 
3363  RenderDebugInfoCompressionArgs(Args, CmdArgs, D, TC);
3364 }
3365 
3367  const InputInfo &Output, const InputInfoList &Inputs,
3368  const ArgList &Args, const char *LinkingOutput) const {
3369  const auto &TC = getToolChain();
3370  const llvm::Triple &RawTriple = TC.getTriple();
3371  const llvm::Triple &Triple = TC.getEffectiveTriple();
3372  const std::string &TripleStr = Triple.getTriple();
3373 
3374  bool KernelOrKext =
3375  Args.hasArg(options::OPT_mkernel, options::OPT_fapple_kext);
3376  const Driver &D = TC.getDriver();
3377  ArgStringList CmdArgs;
3378 
3379  // Check number of inputs for sanity. We need at least one input.
3380  assert(Inputs.size() >= 1 && "Must have at least one input.");
3381  // CUDA/HIP compilation may have multiple inputs (source file + results of
3382  // device-side compilations). OpenMP device jobs also take the host IR as a
3383  // second input. Module precompilation accepts a list of header files to
3384  // include as part of the module. All other jobs are expected to have exactly
3385  // one input.
3386  bool IsCuda = JA.isOffloading(Action::OFK_Cuda);
3387  bool IsHIP = JA.isOffloading(Action::OFK_HIP);
3388  bool IsOpenMPDevice = JA.isDeviceOffloading(Action::OFK_OpenMP);
3389  bool IsHeaderModulePrecompile = isa<HeaderModulePrecompileJobAction>(JA);
3390 
3391  // A header module compilation doesn't have a main input file, so invent a
3392  // fake one as a placeholder.
3393  const char *ModuleName = [&]{
3394  auto *ModuleNameArg = Args.getLastArg(options::OPT_fmodule_name_EQ);
3395  return ModuleNameArg ? ModuleNameArg->getValue() : "";
3396  }();
3397  InputInfo HeaderModuleInput(Inputs[0].getType(), ModuleName, ModuleName);
3398 
3399  const InputInfo &Input =
3400  IsHeaderModulePrecompile ? HeaderModuleInput : Inputs[0];
3401 
3402  InputInfoList ModuleHeaderInputs;
3403  const InputInfo *CudaDeviceInput = nullptr;
3404  const InputInfo *OpenMPDeviceInput = nullptr;
3405  for (const InputInfo &I : Inputs) {
3406  if (&I == &Input) {
3407  // This is the primary input.
3408  } else if (IsHeaderModulePrecompile &&
3409  types::getPrecompiledType(I.getType()) == types::TY_PCH) {
3410  types::ID Expected = HeaderModuleInput.getType();
3411  if (I.getType() != Expected) {
3412  D.Diag(diag::err_drv_module_header_wrong_kind)
3413  << I.getFilename() << types::getTypeName(I.getType())
3414  << types::getTypeName(Expected);
3415  }
3416  ModuleHeaderInputs.push_back(I);
3417  } else if ((IsCuda || IsHIP) && !CudaDeviceInput) {
3418  CudaDeviceInput = &I;
3419  } else if (IsOpenMPDevice && !OpenMPDeviceInput) {
3420  OpenMPDeviceInput = &I;
3421  } else {
3422  llvm_unreachable("unexpectedly given multiple inputs");
3423  }
3424  }
3425 
3426  const llvm::Triple *AuxTriple = IsCuda ? TC.getAuxTriple() : nullptr;
3427  bool IsWindowsGNU = RawTriple.isWindowsGNUEnvironment();
3428  bool IsWindowsCygnus = RawTriple.isWindowsCygwinEnvironment();
3429  bool IsWindowsMSVC = RawTriple.isWindowsMSVCEnvironment();
3430  bool IsIAMCU = RawTriple.isOSIAMCU();
3431 
3432  // Adjust IsWindowsXYZ for CUDA/HIP compilations. Even when compiling in
3433  // device mode (i.e., getToolchain().getTriple() is NVPTX/AMDGCN, not
3434  // Windows), we need to pass Windows-specific flags to cc1.
3435  if (IsCuda || IsHIP) {
3436  IsWindowsMSVC |= AuxTriple && AuxTriple->isWindowsMSVCEnvironment();
3437  IsWindowsGNU |= AuxTriple && AuxTriple->isWindowsGNUEnvironment();
3438  IsWindowsCygnus |= AuxTriple && AuxTriple->isWindowsCygwinEnvironment();
3439  }
3440 
3441  // C++ is not supported for IAMCU.
3442  if (IsIAMCU && types::isCXX(Input.getType()))
3443  D.Diag(diag::err_drv_clang_unsupported) << "C++ for IAMCU";
3444 
3445  // Invoke ourselves in -cc1 mode.
3446  //
3447  // FIXME: Implement custom jobs for internal actions.
3448  CmdArgs.push_back("-cc1");
3449 
3450  // Add the "effective" target triple.
3451  CmdArgs.push_back("-triple");
3452  CmdArgs.push_back(Args.MakeArgString(TripleStr));
3453 
3454  if (const Arg *MJ = Args.getLastArg(options::OPT_MJ)) {
3455  DumpCompilationDatabase(C, MJ->getValue(), TripleStr, Output, Input, Args);
3456  Args.ClaimAllArgs(options::OPT_MJ);
3457  }
3458 
3459  if (IsCuda || IsHIP) {
3460  // We have to pass the triple of the host if compiling for a CUDA/HIP device
3461  // and vice-versa.
3462  std::string NormalizedTriple;
3465  NormalizedTriple = C.getSingleOffloadToolChain<Action::OFK_Host>()
3466  ->getTriple()
3467  .normalize();
3468  else
3469  NormalizedTriple =
3472  ->getTriple()
3473  .normalize();
3474 
3475  CmdArgs.push_back("-aux-triple");
3476  CmdArgs.push_back(Args.MakeArgString(NormalizedTriple));
3477  }
3478 
3479  if (IsOpenMPDevice) {
3480  // We have to pass the triple of the host if compiling for an OpenMP device.
3481  std::string NormalizedTriple =
3483  ->getTriple()
3484  .normalize();
3485  CmdArgs.push_back("-aux-triple");
3486  CmdArgs.push_back(Args.MakeArgString(NormalizedTriple));
3487  }
3488 
3489  if (Triple.isOSWindows() && (Triple.getArch() == llvm::Triple::arm ||
3490  Triple.getArch() == llvm::Triple::thumb)) {
3491  unsigned Offset = Triple.getArch() == llvm::Triple::arm ? 4 : 6;
3492  unsigned Version;
3493  Triple.getArchName().substr(Offset).getAsInteger(10, Version);
3494  if (Version < 7)
3495  D.Diag(diag::err_target_unsupported_arch) << Triple.getArchName()
3496  << TripleStr;
3497  }
3498 
3499  // Push all default warning arguments that are specific to
3500  // the given target. These come before user provided warning options
3501  // are provided.
3502  TC.addClangWarningOptions(CmdArgs);
3503 
3504  // Select the appropriate action.
3505  RewriteKind rewriteKind = RK_None;
3506 
3507  if (isa<AnalyzeJobAction>(JA)) {
3508  assert(JA.getType() == types::TY_Plist && "Invalid output type.");
3509  CmdArgs.push_back("-analyze");
3510  } else if (isa<MigrateJobAction>(JA)) {
3511  CmdArgs.push_back("-migrate");
3512  } else if (isa<PreprocessJobAction>(JA)) {
3513  if (Output.getType() == types::TY_Dependencies)
3514  CmdArgs.push_back("-Eonly");
3515  else {
3516  CmdArgs.push_back("-E");
3517  if (Args.hasArg(options::OPT_rewrite_objc) &&
3518  !Args.hasArg(options::OPT_g_Group))
3519  CmdArgs.push_back("-P");
3520  }
3521  } else if (isa<AssembleJobAction>(JA)) {
3522  CmdArgs.push_back("-emit-obj");
3523 
3524  CollectArgsForIntegratedAssembler(C, Args, CmdArgs, D);
3525 
3526  // Also ignore explicit -force_cpusubtype_ALL option.
3527  (void)Args.hasArg(options::OPT_force__cpusubtype__ALL);
3528  } else if (isa<PrecompileJobAction>(JA)) {
3529  if (JA.getType() == types::TY_Nothing)
3530  CmdArgs.push_back("-fsyntax-only");
3531  else if (JA.getType() == types::TY_ModuleFile)
3532  CmdArgs.push_back(IsHeaderModulePrecompile
3533  ? "-emit-header-module"
3534  : "-emit-module-interface");
3535  else
3536  CmdArgs.push_back("-emit-pch");
3537  } else if (isa<VerifyPCHJobAction>(JA)) {
3538  CmdArgs.push_back("-verify-pch");
3539  } else {
3540  assert((isa<CompileJobAction>(JA) || isa<BackendJobAction>(JA)) &&
3541  "Invalid action for clang tool.");
3542  if (JA.getType() == types::TY_Nothing) {
3543  CmdArgs.push_back("-fsyntax-only");
3544  } else if (JA.getType() == types::TY_LLVM_IR ||
3545  JA.getType() == types::TY_LTO_IR) {
3546  CmdArgs.push_back("-emit-llvm");
3547  } else if (JA.getType() == types::TY_LLVM_BC ||
3548  JA.getType() == types::TY_LTO_BC) {
3549  CmdArgs.push_back("-emit-llvm-bc");
3550  } else if (JA.getType() == types::TY_PP_Asm) {
3551  CmdArgs.push_back("-S");
3552  } else if (JA.getType() == types::TY_AST) {
3553  CmdArgs.push_back("-emit-pch");
3554  } else if (JA.getType() == types::TY_ModuleFile) {
3555  CmdArgs.push_back("-module-file-info");
3556  } else if (JA.getType() == types::TY_RewrittenObjC) {
3557  CmdArgs.push_back("-rewrite-objc");
3558  rewriteKind = RK_NonFragile;
3559  } else if (JA.getType() == types::TY_RewrittenLegacyObjC) {
3560  CmdArgs.push_back("-rewrite-objc");
3561  rewriteKind = RK_Fragile;
3562  } else {
3563  assert(JA.getType() == types::TY_PP_Asm && "Unexpected output type!");
3564  }
3565 
3566  // Preserve use-list order by default when emitting bitcode, so that
3567  // loading the bitcode up in 'opt' or 'llc' and running passes gives the
3568  // same result as running passes here. For LTO, we don't need to preserve
3569  // the use-list order, since serialization to bitcode is part of the flow.
3570  if (JA.getType() == types::TY_LLVM_BC)
3571  CmdArgs.push_back("-emit-llvm-uselists");
3572 
3573  // Device-side jobs do not support LTO.
3574  bool isDeviceOffloadAction = !(JA.isDeviceOffloading(Action::OFK_None) ||
3576 
3577  if (D.isUsingLTO() && !isDeviceOffloadAction) {
3578  Args.AddLastArg(CmdArgs, options::OPT_flto, options::OPT_flto_EQ);
3579 
3580  // The Darwin and PS4 linkers currently use the legacy LTO API, which
3581  // does not support LTO unit features (CFI, whole program vtable opt)
3582  // under ThinLTO.
3583  if (!(RawTriple.isOSDarwin() || RawTriple.isPS4()) ||
3584  D.getLTOMode() == LTOK_Full)
3585  CmdArgs.push_back("-flto-unit");
3586  }
3587  }
3588 
3589  if (const Arg *A = Args.getLastArg(options::OPT_fthinlto_index_EQ)) {
3590  if (!types::isLLVMIR(Input.getType()))
3591  D.Diag(diag::err_drv_argument_only_allowed_with) << A->getAsString(Args)
3592  << "-x ir";
3593  Args.AddLastArg(CmdArgs, options::OPT_fthinlto_index_EQ);
3594  }
3595 
3596  if (Args.getLastArg(options::OPT_save_temps_EQ))
3597  Args.AddLastArg(CmdArgs, options::OPT_save_temps_EQ);
3598 
3599  // Embed-bitcode option.
3600  // Only white-listed flags below are allowed to be embedded.
3601  if (C.getDriver().embedBitcodeInObject() && !C.getDriver().isUsingLTO() &&
3602  (isa<BackendJobAction>(JA) || isa<AssembleJobAction>(JA))) {
3603  // Add flags implied by -fembed-bitcode.
3604  Args.AddLastArg(CmdArgs, options::OPT_fembed_bitcode_EQ);
3605  // Disable all llvm IR level optimizations.
3606  CmdArgs.push_back("-disable-llvm-passes");
3607 
3608  // reject options that shouldn't be supported in bitcode
3609  // also reject kernel/kext
3610  static const constexpr unsigned kBitcodeOptionBlacklist[] = {
3611  options::OPT_mkernel,
3612  options::OPT_fapple_kext,
3613  options::OPT_ffunction_sections,
3614  options::OPT_fno_function_sections,
3615  options::OPT_fdata_sections,
3616  options::OPT_fno_data_sections,
3617  options::OPT_funique_section_names,
3618  options::OPT_fno_unique_section_names,
3619  options::OPT_mrestrict_it,
3620  options::OPT_mno_restrict_it,
3621  options::OPT_mstackrealign,
3622  options::OPT_mno_stackrealign,
3623  options::OPT_mstack_alignment,
3624  options::OPT_mcmodel_EQ,
3625  options::OPT_mlong_calls,
3626  options::OPT_mno_long_calls,
3627  options::OPT_ggnu_pubnames,
3628  options::OPT_gdwarf_aranges,
3629  options::OPT_fdebug_types_section,
3630  options::OPT_fno_debug_types_section,
3631  options::OPT_fdwarf_directory_asm,
3632  options::OPT_fno_dwarf_directory_asm,
3633  options::OPT_mrelax_all,
3634  options::OPT_mno_relax_all,
3635  options::OPT_ftrap_function_EQ,
3636  options::OPT_ffixed_r9,
3637  options::OPT_mfix_cortex_a53_835769,
3638  options::OPT_mno_fix_cortex_a53_835769,
3639  options::OPT_ffixed_x18,
3640  options::OPT_mglobal_merge,
3641  options::OPT_mno_global_merge,
3642  options::OPT_mred_zone,
3643  options::OPT_mno_red_zone,
3644  options::OPT_Wa_COMMA,
3645  options::OPT_Xassembler,
3646  options::OPT_mllvm,
3647  };
3648  for (const auto &A : Args)
3649  if (std::find(std::begin(kBitcodeOptionBlacklist),
3650  std::end(kBitcodeOptionBlacklist),
3651  A->getOption().getID()) !=
3652  std::end(kBitcodeOptionBlacklist))
3653  D.Diag(diag::err_drv_unsupported_embed_bitcode) << A->getSpelling();
3654 
3655  // Render the CodeGen options that need to be passed.
3656  if (!Args.hasFlag(options::OPT_foptimize_sibling_calls,
3657  options::OPT_fno_optimize_sibling_calls))
3658  CmdArgs.push_back("-mdisable-tail-calls");
3659 
3661  CmdArgs);
3662 
3663  // Render ABI arguments
3664  switch (TC.getArch()) {
3665  default: break;
3666  case llvm::Triple::arm:
3667  case llvm::Triple::armeb:
3668  case llvm::Triple::thumbeb:
3669  RenderARMABI(Triple, Args, CmdArgs);
3670  break;
3671  case llvm::Triple::aarch64:
3672  case llvm::Triple::aarch64_be:
3673  RenderAArch64ABI(Triple, Args, CmdArgs);
3674  break;
3675  }
3676 
3677  // Optimization level for CodeGen.
3678  if (const Arg *A = Args.getLastArg(options::OPT_O_Group)) {
3679  if (A->getOption().matches(options::OPT_O4)) {
3680  CmdArgs.push_back("-O3");
3681  D.Diag(diag::warn_O4_is_O3);
3682  } else {
3683  A->render(Args, CmdArgs);
3684  }
3685  }
3686 
3687  // Input/Output file.
3688  if (Output.getType() == types::TY_Dependencies) {
3689  // Handled with other dependency code.
3690  } else if (Output.isFilename()) {
3691  CmdArgs.push_back("-o");
3692  CmdArgs.push_back(Output.getFilename());
3693  } else {
3694  assert(Output.isNothing() && "Input output.");
3695  }
3696 
3697  for (const auto &II : Inputs) {
3698  addDashXForInput(Args, II, CmdArgs);
3699  if (II.isFilename())
3700  CmdArgs.push_back(II.getFilename());
3701  else
3702  II.getInputArg().renderAsInput(Args, CmdArgs);
3703  }
3704 
3705  C.addCommand(llvm::make_unique<Command>(JA, *this, D.getClangProgramPath(),
3706  CmdArgs, Inputs));
3707  return;
3708  }
3709 
3711  CmdArgs.push_back("-fembed-bitcode=marker");
3712 
3713  // We normally speed up the clang process a bit by skipping destructors at
3714  // exit, but when we're generating diagnostics we can rely on some of the
3715  // cleanup.
3716  if (!C.isForDiagnostics())
3717  CmdArgs.push_back("-disable-free");
3718 
3719 #ifdef NDEBUG
3720  const bool IsAssertBuild = false;
3721 #else
3722  const bool IsAssertBuild = true;
3723 #endif
3724 
3725  // Disable the verification pass in -asserts builds.
3726  if (!IsAssertBuild)
3727  CmdArgs.push_back("-disable-llvm-verifier");
3728 
3729  // Discard value names in assert builds unless otherwise specified.
3730  if (Args.hasFlag(options::OPT_fdiscard_value_names,
3731  options::OPT_fno_discard_value_names, !IsAssertBuild))
3732  CmdArgs.push_back("-discard-value-names");
3733 
3734  // Set the main file name, so that debug info works even with
3735  // -save-temps.
3736  CmdArgs.push_back("-main-file-name");
3737  CmdArgs.push_back(getBaseInputName(Args, Input));
3738 
3739  // Some flags which affect the language (via preprocessor
3740  // defines).
3741  if (Args.hasArg(options::OPT_static))
3742  CmdArgs.push_back("-static-define");
3743 
3744  if (Args.hasArg(options::OPT_municode))
3745  CmdArgs.push_back("-DUNICODE");
3746 
3747  if (isa<AnalyzeJobAction>(JA))
3748  RenderAnalyzerOptions(Args, CmdArgs, Triple, Input);
3749 
3750  // Enable compatilibily mode to avoid analyzer-config related errors.
3751  // Since we can't access frontend flags through hasArg, let's manually iterate
3752  // through them.
3753  bool FoundAnalyzerConfig = false;
3754  for (auto Arg : Args.filtered(options::OPT_Xclang))
3755  if (StringRef(Arg->getValue()) == "-analyzer-config") {
3756  FoundAnalyzerConfig = true;
3757  break;
3758  }
3759  if (!FoundAnalyzerConfig)
3760  for (auto Arg : Args.filtered(options::OPT_Xanalyzer))
3761  if (StringRef(Arg->getValue()) == "-analyzer-config") {
3762  FoundAnalyzerConfig = true;
3763  break;
3764  }
3765  if (FoundAnalyzerConfig)
3766  CmdArgs.push_back("-analyzer-config-compatibility-mode=true");
3767 
3768  CheckCodeGenerationOptions(D, Args);
3769 
3770  unsigned FunctionAlignment = ParseFunctionAlignment(TC, Args);
3771  assert(FunctionAlignment <= 31 && "function alignment will be truncated!");
3772  if (FunctionAlignment) {
3773  CmdArgs.push_back("-function-alignment");
3774  CmdArgs.push_back(Args.MakeArgString(std::to_string(FunctionAlignment)));
3775  }
3776 
3777  llvm::Reloc::Model RelocationModel;
3778  unsigned PICLevel;
3779  bool IsPIE;
3780  std::tie(RelocationModel, PICLevel, IsPIE) = ParsePICArgs(TC, Args);
3781 
3782  const char *RMName = RelocationModelName(RelocationModel);
3783 
3784  if ((RelocationModel == llvm::Reloc::ROPI ||
3785  RelocationModel == llvm::Reloc::ROPI_RWPI) &&
3786  types::isCXX(Input.getType()) &&
3787  !Args.hasArg(options::OPT_fallow_unsupported))
3788  D.Diag(diag::err_drv_ropi_incompatible_with_cxx);
3789 
3790  if (RMName) {
3791  CmdArgs.push_back("-mrelocation-model");
3792  CmdArgs.push_back(RMName);
3793  }
3794  if (PICLevel > 0) {
3795  CmdArgs.push_back("-pic-level");
3796  CmdArgs.push_back(PICLevel == 1 ? "1" : "2");
3797  if (IsPIE)
3798  CmdArgs.push_back("-pic-is-pie");
3799  }
3800 
3801  if (Arg *A = Args.getLastArg(options::OPT_meabi)) {
3802  CmdArgs.push_back("-meabi");
3803  CmdArgs.push_back(A->getValue());
3804  }
3805 
3806  CmdArgs.push_back("-mthread-model");
3807  if (Arg *A = Args.getLastArg(options::OPT_mthread_model)) {
3808  if (!TC.isThreadModelSupported(A->getValue()))
3809  D.Diag(diag::err_drv_invalid_thread_model_for_target)
3810  << A->getValue() << A->getAsString(Args);
3811  CmdArgs.push_back(A->getValue());
3812  }
3813  else
3814  CmdArgs.push_back(Args.MakeArgString(TC.getThreadModel()));
3815 
3816  Args.AddLastArg(CmdArgs, options::OPT_fveclib);
3817 
3818  if (Args.hasFlag(options::OPT_fmerge_all_constants,
3819  options::OPT_fno_merge_all_constants, false))
3820  CmdArgs.push_back("-fmerge-all-constants");
3821 
3822  if (Args.hasFlag(options::OPT_fno_delete_null_pointer_checks,
3823  options::OPT_fdelete_null_pointer_checks, false))
3824  CmdArgs.push_back("-fno-delete-null-pointer-checks");
3825 
3826  // LLVM Code Generator Options.
3827 
3828  if (Args.hasArg(options::OPT_frewrite_map_file) ||
3829  Args.hasArg(options::OPT_frewrite_map_file_EQ)) {
3830  for (const Arg *A : Args.filtered(options::OPT_frewrite_map_file,
3831  options::OPT_frewrite_map_file_EQ)) {
3832  StringRef Map = A->getValue();
3833  if (!llvm::sys::fs::exists(Map)) {
3834  D.Diag(diag::err_drv_no_such_file) << Map;
3835  } else {
3836  CmdArgs.push_back("-frewrite-map-file");
3837  CmdArgs.push_back(A->getValue());
3838  A->claim();
3839  }
3840  }
3841  }
3842 
3843  if (Arg *A = Args.getLastArg(options::OPT_Wframe_larger_than_EQ)) {
3844  StringRef v = A->getValue();
3845  CmdArgs.push_back("-mllvm");
3846  CmdArgs.push_back(Args.MakeArgString("-warn-stack-size=" + v));
3847  A->claim();
3848  }
3849 
3850  if (!Args.hasFlag(options::OPT_fjump_tables, options::OPT_fno_jump_tables,
3851  true))
3852  CmdArgs.push_back("-fno-jump-tables");
3853 
3854  if (Args.hasFlag(options::OPT_fprofile_sample_accurate,
3855  options::OPT_fno_profile_sample_accurate, false))
3856  CmdArgs.push_back("-fprofile-sample-accurate");
3857 
3858  if (!Args.hasFlag(options::OPT_fpreserve_as_comments,
3859  options::OPT_fno_preserve_as_comments, true))
3860  CmdArgs.push_back("-fno-preserve-as-comments");
3861 
3862  if (Arg *A = Args.getLastArg(options::OPT_mregparm_EQ)) {
3863  CmdArgs.push_back("-mregparm");
3864  CmdArgs.push_back(A->getValue());
3865  }
3866 
3867  if (Arg *A = Args.getLastArg(options::OPT_fpcc_struct_return,
3868  options::OPT_freg_struct_return)) {
3869  if (TC.getArch() != llvm::Triple::x86) {
3870  D.Diag(diag::err_drv_unsupported_opt_for_target)
3871  << A->getSpelling() << RawTriple.str();
3872  } else if (A->getOption().matches(options::OPT_fpcc_struct_return)) {
3873  CmdArgs.push_back("-fpcc-struct-return");
3874  } else {
3875  assert(A->getOption().matches(options::OPT_freg_struct_return));
3876  CmdArgs.push_back("-freg-struct-return");
3877  }
3878  }
3879 
3880  if (Args.hasFlag(options::OPT_mrtd, options::OPT_mno_rtd, false))
3881  CmdArgs.push_back("-fdefault-calling-conv=stdcall");
3882 
3883  if (shouldUseFramePointer(Args, RawTriple))
3884  CmdArgs.push_back("-mdisable-fp-elim");
3885  if (!Args.hasFlag(options::OPT_fzero_initialized_in_bss,
3886  options::OPT_fno_zero_initialized_in_bss))
3887  CmdArgs.push_back("-mno-zero-initialized-in-bss");
3888 
3889  bool OFastEnabled = isOptimizationLevelFast(Args);
3890  // If -Ofast is the optimization level, then -fstrict-aliasing should be
3891  // enabled. This alias option is being used to simplify the hasFlag logic.
3892  OptSpecifier StrictAliasingAliasOption =
3893  OFastEnabled ? options::OPT_Ofast : options::OPT_fstrict_aliasing;
3894  // We turn strict aliasing off by default if we're in CL mode, since MSVC
3895  // doesn't do any TBAA.
3896  bool TBAAOnByDefault = !D.IsCLMode();
3897  if (!Args.hasFlag(options::OPT_fstrict_aliasing, StrictAliasingAliasOption,
3898  options::OPT_fno_strict_aliasing, TBAAOnByDefault))
3899  CmdArgs.push_back("-relaxed-aliasing");
3900  if (!Args.hasFlag(options::OPT_fstruct_path_tbaa,
3901  options::OPT_fno_struct_path_tbaa))
3902  CmdArgs.push_back("-no-struct-path-tbaa");
3903  if (Args.hasFlag(options::OPT_fstrict_enums, options::OPT_fno_strict_enums,
3904  false))
3905  CmdArgs.push_back("-fstrict-enums");
3906  if (!Args.hasFlag(options::OPT_fstrict_return, options::OPT_fno_strict_return,
3907  true))
3908  CmdArgs.push_back("-fno-strict-return");
3909  if (Args.hasFlag(options::OPT_fallow_editor_placeholders,
3910  options::OPT_fno_allow_editor_placeholders, false))
3911  CmdArgs.push_back("-fallow-editor-placeholders");
3912  if (Args.hasFlag(options::OPT_fstrict_vtable_pointers,
3913  options::OPT_fno_strict_vtable_pointers,
3914  false))
3915  CmdArgs.push_back("-fstrict-vtable-pointers");
3916  if (Args.hasFlag(options::OPT_fforce_emit_vtables,
3917  options::OPT_fno_force_emit_vtables,
3918  false))
3919  CmdArgs.push_back("-fforce-emit-vtables");
3920  if (!Args.hasFlag(options::OPT_foptimize_sibling_calls,
3921  options::OPT_fno_optimize_sibling_calls))
3922  CmdArgs.push_back("-mdisable-tail-calls");
3923  if (Args.hasFlag(options::OPT_fno_escaping_block_tail_calls,
3924  options::OPT_fescaping_block_tail_calls, false))
3925  CmdArgs.push_back("-fno-escaping-block-tail-calls");
3926 
3927  Args.AddLastArg(CmdArgs, options::OPT_ffine_grained_bitfield_accesses,
3928  options::OPT_fno_fine_grained_bitfield_accesses);
3929 
3930  // Handle segmented stacks.
3931  if (Args.hasArg(options::OPT_fsplit_stack))
3932  CmdArgs.push_back("-split-stacks");
3933 
3934  RenderFloatingPointOptions(TC, D, OFastEnabled, Args, CmdArgs);
3935 
3936  // Decide whether to use verbose asm. Verbose assembly is the default on
3937  // toolchains which have the integrated assembler on by default.
3938  bool IsIntegratedAssemblerDefault = TC.IsIntegratedAssemblerDefault();
3939  if (Args.hasFlag(options::OPT_fverbose_asm, options::OPT_fno_verbose_asm,
3940  IsIntegratedAssemblerDefault) ||
3941  Args.hasArg(options::OPT_dA))
3942  CmdArgs.push_back("-masm-verbose");
3943 
3944  if (!TC.useIntegratedAs())
3945  CmdArgs.push_back("-no-integrated-as");
3946 
3947  if (Args.hasArg(options::OPT_fdebug_pass_structure)) {
3948  CmdArgs.push_back("-mdebug-pass");
3949  CmdArgs.push_back("Structure");
3950  }
3951  if (Args.hasArg(options::OPT_fdebug_pass_arguments)) {
3952  CmdArgs.push_back("-mdebug-pass");
3953  CmdArgs.push_back("Arguments");
3954  }
3955 
3956  // Enable -mconstructor-aliases except on darwin, where we have to work around
3957  // a linker bug (see <rdar://problem/7651567>), and CUDA device code, where
3958  // aliases aren't supported.
3959  if (!RawTriple.isOSDarwin() && !RawTriple.isNVPTX())
3960  CmdArgs.push_back("-mconstructor-aliases");
3961 
3962  // Darwin's kernel doesn't support guard variables; just die if we
3963  // try to use them.
3964  if (KernelOrKext && RawTriple.isOSDarwin())
3965  CmdArgs.push_back("-fforbid-guard-variables");
3966 
3967  if (Args.hasFlag(options::OPT_mms_bitfields, options::OPT_mno_ms_bitfields,
3968  false)) {
3969  CmdArgs.push_back("-mms-bitfields");
3970  }
3971 
3972  if (Args.hasFlag(options::OPT_mpie_copy_relocations,
3973  options::OPT_mno_pie_copy_relocations,
3974  false)) {
3975  CmdArgs.push_back("-mpie-copy-relocations");
3976  }
3977 
3978  if (Args.hasFlag(options::OPT_fno_plt, options::OPT_fplt, false)) {
3979  CmdArgs.push_back("-fno-plt");
3980  }
3981 
3982  // -fhosted is default.
3983  // TODO: Audit uses of KernelOrKext and see where it'd be more appropriate to
3984  // use Freestanding.
3985  bool Freestanding =
3986  Args.hasFlag(options::OPT_ffreestanding, options::OPT_fhosted, false) ||
3987  KernelOrKext;
3988  if (Freestanding)
3989  CmdArgs.push_back("-ffreestanding");
3990 
3991  // This is a coarse approximation of what llvm-gcc actually does, both
3992  // -fasynchronous-unwind-tables and -fnon-call-exceptions interact in more
3993  // complicated ways.
3994  bool AsynchronousUnwindTables =
3995  Args.hasFlag(options::OPT_fasynchronous_unwind_tables,
3996  options::OPT_fno_asynchronous_unwind_tables,
3997  (TC.IsUnwindTablesDefault(Args) ||
3998  TC.getSanitizerArgs().needsUnwindTables()) &&
3999  !Freestanding);
4000  if (Args.hasFlag(options::OPT_funwind_tables, options::OPT_fno_unwind_tables,
4001  AsynchronousUnwindTables))
4002  CmdArgs.push_back("-munwind-tables");
4003 
4004  TC.addClangTargetOptions(Args, CmdArgs, JA.getOffloadingDeviceKind());
4005 
4006  // FIXME: Handle -mtune=.
4007  (void)Args.hasArg(options::OPT_mtune_EQ);
4008 
4009  if (Arg *A = Args.getLastArg(options::OPT_mcmodel_EQ)) {
4010  CmdArgs.push_back("-mcode-model");
4011  CmdArgs.push_back(A->getValue());
4012  }
4013 
4014  // Add the target cpu
4015  std::string CPU = getCPUName(Args, Triple, /*FromAs*/ false);
4016  if (!CPU.empty()) {
4017  CmdArgs.push_back("-target-cpu");
4018  CmdArgs.push_back(Args.MakeArgString(CPU));
4019  }
4020 
4021  RenderTargetOptions(Triple, Args, KernelOrKext, CmdArgs);
4022 
4023  // These two are potentially updated by AddClangCLArgs.
4025  bool EmitCodeView = false;
4026 
4027  // Add clang-cl arguments.
4028  types::ID InputType = Input.getType();
4029  if (D.IsCLMode())
4030  AddClangCLArgs(Args, InputType, CmdArgs, &DebugInfoKind, &EmitCodeView);
4031 
4032  DwarfFissionKind DwarfFission;
4033  RenderDebugOptions(TC, D, RawTriple, Args, EmitCodeView, IsWindowsMSVC,
4034  CmdArgs, DebugInfoKind, DwarfFission);
4035 
4036  // Add the split debug info name to the command lines here so we
4037  // can propagate it to the backend.
4038  bool SplitDWARF = (DwarfFission != DwarfFissionKind::None) &&
4039  (RawTriple.isOSLinux() || RawTriple.isOSFuchsia()) &&
4040  (isa<AssembleJobAction>(JA) || isa<CompileJobAction>(JA) ||
4041  isa<BackendJobAction>(JA));
4042  const char *SplitDWARFOut;
4043  if (SplitDWARF) {
4044  CmdArgs.push_back("-split-dwarf-file");
4045  SplitDWARFOut = SplitDebugName(Args, Output);
4046  CmdArgs.push_back(SplitDWARFOut);
4047  }
4048 
4049  // Pass the linker version in use.
4050  if (Arg *A = Args.getLastArg(options::OPT_mlinker_version_EQ)) {
4051  CmdArgs.push_back("-target-linker-version");
4052  CmdArgs.push_back(A->getValue());
4053  }
4054 
4055  if (!shouldUseLeafFramePointer(Args, RawTriple))
4056  CmdArgs.push_back("-momit-leaf-frame-pointer");
4057 
4058  // Explicitly error on some things we know we don't support and can't just
4059  // ignore.
4060  if (!Args.hasArg(options::OPT_fallow_unsupported)) {
4061  Arg *Unsupported;
4062  if (types::isCXX(InputType) && RawTriple.isOSDarwin() &&
4063  TC.getArch() == llvm::Triple::x86) {
4064  if ((Unsupported = Args.getLastArg(options::OPT_fapple_kext)) ||
4065  (Unsupported = Args.getLastArg(options::OPT_mkernel)))
4066  D.Diag(diag::err_drv_clang_unsupported_opt_cxx_darwin_i386)
4067  << Unsupported->getOption().getName();
4068  }
4069  // The faltivec option has been superseded by the maltivec option.
4070  if ((Unsupported = Args.getLastArg(options::OPT_faltivec)))
4071  D.Diag(diag::err_drv_clang_unsupported_opt_faltivec)
4072  << Unsupported->getOption().getName()
4073  << "please use -maltivec and include altivec.h explicitly";
4074  if ((Unsupported = Args.getLastArg(options::OPT_fno_altivec)))
4075  D.Diag(diag::err_drv_clang_unsupported_opt_faltivec)
4076  << Unsupported->getOption().getName() << "please use -mno-altivec";
4077  }
4078 
4079  Args.AddAllArgs(CmdArgs, options::OPT_v);
4080  Args.AddLastArg(CmdArgs, options::OPT_H);
4081  if (D.CCPrintHeaders && !D.CCGenDiagnostics) {
4082  CmdArgs.push_back("-header-include-file");
4083  CmdArgs.push_back(D.CCPrintHeadersFilename ? D.CCPrintHeadersFilename
4084  : "-");
4085  }
4086  Args.AddLastArg(CmdArgs, options::OPT_P);
4087  Args.AddLastArg(CmdArgs, options::OPT_print_ivar_layout);
4088 
4089  if (D.CCLogDiagnostics && !D.CCGenDiagnostics) {
4090  CmdArgs.push_back("-diagnostic-log-file");
4091  CmdArgs.push_back(D.CCLogDiagnosticsFilename ? D.CCLogDiagnosticsFilename
4092  : "-");
4093  }
4094 
4095  bool UseSeparateSections = isUseSeparateSections(Triple);
4096 
4097  if (Args.hasFlag(options::OPT_ffunction_sections,
4098  options::OPT_fno_function_sections, UseSeparateSections)) {
4099  CmdArgs.push_back("-ffunction-sections");
4100  }
4101 
4102  if (Args.hasFlag(options::OPT_fdata_sections, options::OPT_fno_data_sections,
4103  UseSeparateSections)) {
4104  CmdArgs.push_back("-fdata-sections");
4105  }
4106 
4107  if (!Args.hasFlag(options::OPT_funique_section_names,
4108  options::OPT_fno_unique_section_names, true))
4109  CmdArgs.push_back("-fno-unique-section-names");
4110 
4111  if (auto *A = Args.getLastArg(
4112  options::OPT_finstrument_functions,
4113  options::OPT_finstrument_functions_after_inlining,
4114  options::OPT_finstrument_function_entry_bare))
4115  A->render(Args, CmdArgs);
4116 
4117  // NVPTX doesn't support PGO or coverage. There's no runtime support for
4118  // sampling, overhead of call arc collection is way too high and there's no
4119  // way to collect the output.
4120  if (!Triple.isNVPTX())
4121  addPGOAndCoverageFlags(C, D, Output, Args, CmdArgs);
4122 
4123  if (auto *ABICompatArg = Args.getLastArg(options::OPT_fclang_abi_compat_EQ))
4124  ABICompatArg->render(Args, CmdArgs);
4125 
4126  // Add runtime flag for PS4 when PGO, coverage, or sanitizers are enabled.
4127  if (RawTriple.isPS4CPU() &&
4128  !Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
4129  PS4cpu::addProfileRTArgs(TC, Args, CmdArgs);
4130  PS4cpu::addSanitizerArgs(TC, CmdArgs);
4131  }
4132 
4133  // Pass options for controlling the default header search paths.
4134  if (Args.hasArg(options::OPT_nostdinc)) {
4135  CmdArgs.push_back("-nostdsysteminc");
4136  CmdArgs.push_back("-nobuiltininc");
4137  } else {
4138  if (Args.hasArg(options::OPT_nostdlibinc))
4139  CmdArgs.push_back("-nostdsysteminc");
4140  Args.AddLastArg(CmdArgs, options::OPT_nostdincxx);
4141  Args.AddLastArg(CmdArgs, options::OPT_nobuiltininc);
4142  }
4143 
4144  // Pass the path to compiler resource files.
4145  CmdArgs.push_back("-resource-dir");
4146  CmdArgs.push_back(D.ResourceDir.c_str());
4147 
4148  Args.AddLastArg(CmdArgs, options::OPT_working_directory);
4149 
4150  RenderARCMigrateToolOptions(D, Args, CmdArgs);
4151 
4152  // Add preprocessing options like -I, -D, etc. if we are using the
4153  // preprocessor.
4154  //
4155  // FIXME: Support -fpreprocessed
4157  AddPreprocessingOptions(C, JA, D, Args, CmdArgs, Output, Inputs);
4158 
4159  // Don't warn about "clang -c -DPIC -fPIC test.i" because libtool.m4 assumes
4160  // that "The compiler can only warn and ignore the option if not recognized".
4161  // When building with ccache, it will pass -D options to clang even on
4162  // preprocessed inputs and configure concludes that -fPIC is not supported.
4163  Args.ClaimAllArgs(options::OPT_D);
4164 
4165  // Manually translate -O4 to -O3; let clang reject others.
4166  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
4167  if (A->getOption().matches(options::OPT_O4)) {
4168  CmdArgs.push_back("-O3");
4169  D.Diag(diag::warn_O4_is_O3);
4170  } else {
4171  A->render(Args, CmdArgs);
4172  }
4173  }
4174 
4175  // Warn about ignored options to clang.
4176  for (const Arg *A :
4177  Args.filtered(options::OPT_clang_ignored_gcc_optimization_f_Group)) {
4178  D.Diag(diag::warn_ignored_gcc_optimization) << A->getAsString(Args);
4179  A->claim();
4180  }
4181 
4182  for (const Arg *A :
4183  Args.filtered(options::OPT_clang_ignored_legacy_options_Group)) {
4184  D.Diag(diag::warn_ignored_clang_option) << A->getAsString(Args);
4185  A->claim();
4186  }
4187 
4188  claimNoWarnArgs(Args);
4189 
4190  Args.AddAllArgs(CmdArgs, options::OPT_R_Group);
4191 
4192  Args.AddAllArgs(CmdArgs, options::OPT_W_Group);
4193  if (Args.hasFlag(options::OPT_pedantic, options::OPT_no_pedantic, false))
4194  CmdArgs.push_back("-pedantic");
4195  Args.AddLastArg(CmdArgs, options::OPT_pedantic_errors);
4196  Args.AddLastArg(CmdArgs, options::OPT_w);
4197 
4198  // Fixed point flags
4199  if (Args.hasFlag(options::OPT_ffixed_point, options::OPT_fno_fixed_point,
4200  /*Default=*/false))
4201  Args.AddLastArg(CmdArgs, options::OPT_ffixed_point);
4202 
4203  // Handle -{std, ansi, trigraphs} -- take the last of -{std, ansi}
4204  // (-ansi is equivalent to -std=c89 or -std=c++98).
4205  //
4206  // If a std is supplied, only add -trigraphs if it follows the
4207  // option.
4208  bool ImplyVCPPCXXVer = false;
4209  if (Arg *Std = Args.getLastArg(options::OPT_std_EQ, options::OPT_ansi)) {
4210  if (Std->getOption().matches(options::OPT_ansi))
4211  if (types::isCXX(InputType))
4212  CmdArgs.push_back("-std=c++98");
4213  else
4214  CmdArgs.push_back("-std=c89");
4215  else
4216  Std->render(Args, CmdArgs);
4217 
4218  // If -f(no-)trigraphs appears after the language standard flag, honor it.
4219  if (Arg *A = Args.getLastArg(options::OPT_std_EQ, options::OPT_ansi,
4220  options::OPT_ftrigraphs,
4221  options::OPT_fno_trigraphs))
4222  if (A != Std)
4223  A->render(Args, CmdArgs);
4224  } else {
4225  // Honor -std-default.
4226  //
4227  // FIXME: Clang doesn't correctly handle -std= when the input language
4228  // doesn't match. For the time being just ignore this for C++ inputs;
4229  // eventually we want to do all the standard defaulting here instead of
4230  // splitting it between the driver and clang -cc1.
4231  if (!types::isCXX(InputType))
4232  Args.AddAllArgsTranslated(CmdArgs, options::OPT_std_default_EQ, "-std=",
4233  /*Joined=*/true);
4234  else if (IsWindowsMSVC)
4235  ImplyVCPPCXXVer = true;
4236 
4237  Args.AddLastArg(CmdArgs, options::OPT_ftrigraphs,
4238  options::OPT_fno_trigraphs);
4239  }
4240 
4241  // GCC's behavior for -Wwrite-strings is a bit strange:
4242  // * In C, this "warning flag" changes the types of string literals from
4243  // 'char[N]' to 'const char[N]', and thus triggers an unrelated warning
4244  // for the discarded qualifier.
4245  // * In C++, this is just a normal warning flag.
4246  //
4247  // Implementing this warning correctly in C is hard, so we follow GCC's
4248  // behavior for now. FIXME: Directly diagnose uses of a string literal as
4249  // a non-const char* in C, rather than using this crude hack.
4250  if (!types::isCXX(InputType)) {
4251  // FIXME: This should behave just like a warning flag, and thus should also
4252  // respect -Weverything, -Wno-everything, -Werror=write-strings, and so on.
4253  Arg *WriteStrings =
4254  Args.getLastArg(options::OPT_Wwrite_strings,
4255  options::OPT_Wno_write_strings, options::OPT_w);
4256  if (WriteStrings &&
4257  WriteStrings->getOption().matches(options::OPT_Wwrite_strings))
4258  CmdArgs.push_back("-fconst-strings");
4259  }
4260 
4261  // GCC provides a macro definition '__DEPRECATED' when -Wdeprecated is active
4262  // during C++ compilation, which it is by default. GCC keeps this define even
4263  // in the presence of '-w', match this behavior bug-for-bug.
4264  if (types::isCXX(InputType) &&
4265  Args.hasFlag(options::OPT_Wdeprecated, options::OPT_Wno_deprecated,
4266  true)) {
4267  CmdArgs.push_back("-fdeprecated-macro");
4268  }
4269 
4270  // Translate GCC's misnamer '-fasm' arguments to '-fgnu-keywords'.
4271  if (Arg *Asm = Args.getLastArg(options::OPT_fasm, options::OPT_fno_asm)) {
4272  if (Asm->getOption().matches(options::OPT_fasm))
4273  CmdArgs.push_back("-fgnu-keywords");
4274  else
4275  CmdArgs.push_back("-fno-gnu-keywords");
4276  }
4277 
4278  if (ShouldDisableDwarfDirectory(Args, TC))
4279  CmdArgs.push_back("-fno-dwarf-directory-asm");
4280 
4281  if (ShouldDisableAutolink(Args, TC))
4282  CmdArgs.push_back("-fno-autolink");
4283 
4284  // Add in -fdebug-compilation-dir if necessary.
4285  addDebugCompDirArg(Args, CmdArgs);
4286 
4287  addDebugPrefixMapArg(D, Args, CmdArgs);
4288 
4289  if (Arg *A = Args.getLastArg(options::OPT_ftemplate_depth_,
4290  options::OPT_ftemplate_depth_EQ)) {
4291  CmdArgs.push_back("-ftemplate-depth");
4292  CmdArgs.push_back(A->getValue());
4293  }
4294 
4295  if (Arg *A = Args.getLastArg(options::OPT_foperator_arrow_depth_EQ)) {
4296  CmdArgs.push_back("-foperator-arrow-depth");
4297  CmdArgs.push_back(A->getValue());
4298  }
4299 
4300  if (Arg *A = Args.getLastArg(options::OPT_fconstexpr_depth_EQ)) {
4301  CmdArgs.push_back("-fconstexpr-depth");
4302  CmdArgs.push_back(A->getValue());
4303  }
4304 
4305  if (Arg *A = Args.getLastArg(options::OPT_fconstexpr_steps_EQ)) {
4306  CmdArgs.push_back("-fconstexpr-steps");
4307  CmdArgs.push_back(A->getValue());
4308  }
4309 
4310  if (Arg *A = Args.getLastArg(options::OPT_fbracket_depth_EQ)) {
4311  CmdArgs.push_back("-fbracket-depth");
4312  CmdArgs.push_back(A->getValue());
4313  }
4314 
4315  if (Arg *A = Args.getLastArg(options::OPT_Wlarge_by_value_copy_EQ,
4316  options::OPT_Wlarge_by_value_copy_def)) {
4317  if (A->getNumValues()) {
4318  StringRef bytes = A->getValue();
4319  CmdArgs.push_back(Args.MakeArgString("-Wlarge-by-value-copy=" + bytes));
4320  } else
4321  CmdArgs.push_back("-Wlarge-by-value-copy=64"); // default value
4322  }
4323 
4324  if (Args.hasArg(options::OPT_relocatable_pch))
4325  CmdArgs.push_back("-relocatable-pch");
4326 
4327  if (const Arg *A = Args.getLastArg(options::OPT_fcf_runtime_abi_EQ)) {
4328  static const char *kCFABIs[] = {
4329  "standalone", "objc", "swift", "swift-5.0", "swift-4.2", "swift-4.1",
4330  };
4331 
4332  if (find(kCFABIs, StringRef(A->getValue())) == std::end(kCFABIs))
4333  D.Diag(diag::err_drv_invalid_cf_runtime_abi) << A->getValue();
4334  else
4335  A->render(Args, CmdArgs);
4336  }
4337 
4338  if (Arg *A = Args.getLastArg(options::OPT_fconstant_string_class_EQ)) {
4339  CmdArgs.push_back("-fconstant-string-class");
4340  CmdArgs.push_back(A->getValue());
4341  }
4342 
4343  if (Arg *A = Args.getLastArg(options::OPT_ftabstop_EQ)) {
4344  CmdArgs.push_back("-ftabstop");
4345  CmdArgs.push_back(A->getValue());
4346  }
4347 
4348  if (Args.hasFlag(options::OPT_fstack_size_section,
4349  options::OPT_fno_stack_size_section, RawTriple.isPS4()))
4350  CmdArgs.push_back("-fstack-size-section");
4351 
4352  CmdArgs.push_back("-ferror-limit");
4353  if (Arg *A = Args.getLastArg(options::OPT_ferror_limit_EQ))
4354  CmdArgs.push_back(A->getValue());
4355  else
4356  CmdArgs.push_back("19");
4357 
4358  if (Arg *A = Args.getLastArg(options::OPT_fmacro_backtrace_limit_EQ)) {
4359  CmdArgs.push_back("-fmacro-backtrace-limit");
4360  CmdArgs.push_back(A->getValue());
4361  }
4362 
4363  if (Arg *A = Args.getLastArg(options::OPT_ftemplate_backtrace_limit_EQ)) {
4364  CmdArgs.push_back("-ftemplate-backtrace-limit");
4365  CmdArgs.push_back(A->getValue());
4366  }
4367 
4368  if (Arg *A = Args.getLastArg(options::OPT_fconstexpr_backtrace_limit_EQ)) {
4369  CmdArgs.push_back("-fconstexpr-backtrace-limit");
4370  CmdArgs.push_back(A->getValue());
4371  }
4372 
4373  if (Arg *A = Args.getLastArg(options::OPT_fspell_checking_limit_EQ)) {
4374  CmdArgs.push_back("-fspell-checking-limit");
4375  CmdArgs.push_back(A->getValue());
4376  }
4377 
4378  // Pass -fmessage-length=.
4379  CmdArgs.push_back("-fmessage-length");
4380  if (Arg *A = Args.getLastArg(options::OPT_fmessage_length_EQ)) {
4381  CmdArgs.push_back(A->getValue());
4382  } else {
4383  // If -fmessage-length=N was not specified, determine whether this is a
4384  // terminal and, if so, implicitly define -fmessage-length appropriately.
4385  unsigned N = llvm::sys::Process::StandardErrColumns();
4386  CmdArgs.push_back(Args.MakeArgString(Twine(N)));
4387  }
4388 
4389  // -fvisibility= and -fvisibility-ms-compat are of a piece.
4390  if (const Arg *A = Args.getLastArg(options::OPT_fvisibility_EQ,
4391  options::OPT_fvisibility_ms_compat)) {
4392  if (A->getOption().matches(options::OPT_fvisibility_EQ)) {
4393  CmdArgs.push_back("-fvisibility");
4394  CmdArgs.push_back(A->getValue());
4395  } else {
4396  assert(A->getOption().matches(options::OPT_fvisibility_ms_compat));
4397  CmdArgs.push_back("-fvisibility");
4398  CmdArgs.push_back("hidden");
4399  CmdArgs.push_back("-ftype-visibility");
4400  CmdArgs.push_back("default");
4401  }
4402  }
4403 
4404  Args.AddLastArg(CmdArgs, options::OPT_fvisibility_inlines_hidden);
4405  Args.AddLastArg(CmdArgs, options::OPT_fvisibility_global_new_delete_hidden);
4406 
4407  Args.AddLastArg(CmdArgs, options::OPT_ftlsmodel_EQ);
4408 
4409  // Forward -f (flag) options which we can pass directly.
4410  Args.AddLastArg(CmdArgs, options::OPT_femit_all_decls);
4411  Args.AddLastArg(CmdArgs, options::OPT_fheinous_gnu_extensions);
4412  Args.AddLastArg(CmdArgs, options::OPT_fdigraphs, options::OPT_fno_digraphs);
4413  Args.AddLastArg(CmdArgs, options::OPT_fno_operator_names);
4414  Args.AddLastArg(CmdArgs, options::OPT_femulated_tls,
4415  options::OPT_fno_emulated_tls);
4416  Args.AddLastArg(CmdArgs, options::OPT_fkeep_static_consts);
4417 
4418  // AltiVec-like language extensions aren't relevant for assembling.
4419  if (!isa<PreprocessJobAction>(JA) || Output.getType() != types::TY_PP_Asm)
4420  Args.AddLastArg(CmdArgs, options::OPT_fzvector);
4421 
4422  Args.AddLastArg(CmdArgs, options::OPT_fdiagnostics_show_template_tree);
4423  Args.AddLastArg(CmdArgs, options::OPT_fno_elide_type);
4424 
4425  // Forward flags for OpenMP. We don't do this if the current action is an
4426  // device offloading action other than OpenMP.
4427  if (Args.hasFlag(options::OPT_fopenmp, options::OPT_fopenmp_EQ,
4428  options::OPT_fno_openmp, false) &&
4431  switch (D.getOpenMPRuntime(Args)) {
4432  case Driver::OMPRT_OMP:
4433  case Driver::OMPRT_IOMP5:
4434  // Clang can generate useful OpenMP code for these two runtime libraries.
4435  CmdArgs.push_back("-fopenmp");
4436 
4437  // If no option regarding the use of TLS in OpenMP codegeneration is
4438  // given, decide a default based on the target. Otherwise rely on the
4439  // options and pass the right information to the frontend.
4440  if (!Args.hasFlag(options::OPT_fopenmp_use_tls,
4441  options::OPT_fnoopenmp_use_tls, /*Default=*/true))
4442  CmdArgs.push_back("-fnoopenmp-use-tls");
4443  Args.AddLastArg(CmdArgs, options::OPT_fopenmp_simd,
4444  options::OPT_fno_openmp_simd);
4445  Args.AddAllArgs(CmdArgs, options::OPT_fopenmp_version_EQ);
4446  Args.AddAllArgs(CmdArgs, options::OPT_fopenmp_cuda_number_of_sm_EQ);
4447  Args.AddAllArgs(CmdArgs, options::OPT_fopenmp_cuda_blocks_per_sm_EQ);
4448  if (Args.hasFlag(options::OPT_fopenmp_optimistic_collapse,
4449  options::OPT_fno_openmp_optimistic_collapse,
4450  /*Default=*/false))
4451  CmdArgs.push_back("-fopenmp-optimistic-collapse");
4452 
4453  // When in OpenMP offloading mode with NVPTX target, forward
4454  // cuda-mode flag
4455  if (Args.hasFlag(options::OPT_fopenmp_cuda_mode,
4456  options::OPT_fno_openmp_cuda_mode, /*Default=*/false))
4457  CmdArgs.push_back("-fopenmp-cuda-mode");
4458 
4459  // When in OpenMP offloading mode with NVPTX target, check if full runtime
4460  // is required.
4461  if (Args.hasFlag(options::OPT_fopenmp_cuda_force_full_runtime,
4462  options::OPT_fno_openmp_cuda_force_full_runtime,
4463  /*Default=*/false))
4464  CmdArgs.push_back("-fopenmp-cuda-force-full-runtime");
4465  break;
4466  default:
4467  // By default, if Clang doesn't know how to generate useful OpenMP code
4468  // for a specific runtime library, we just don't pass the '-fopenmp' flag
4469  // down to the actual compilation.
4470  // FIXME: It would be better to have a mode which *only* omits IR
4471  // generation based on the OpenMP support so that we get consistent
4472  // semantic analysis, etc.
4473  break;
4474  }
4475  } else {
4476  Args.AddLastArg(CmdArgs, options::OPT_fopenmp_simd,
4477  options::OPT_fno_openmp_simd);
4478  Args.AddAllArgs(CmdArgs, options::OPT_fopenmp_version_EQ);
4479  }
4480 
4481  const SanitizerArgs &Sanitize = TC.getSanitizerArgs();
4482  Sanitize.addArgs(TC, Args, CmdArgs, InputType);
4483 
4484  const XRayArgs &XRay = TC.getXRayArgs();
4485  XRay.addArgs(TC, Args, CmdArgs, InputType);
4486 
4487  if (TC.SupportsProfiling())
4488  Args.AddLastArg(CmdArgs, options::OPT_pg);
4489 
4490  if (TC.SupportsProfiling())
4491  Args.AddLastArg(CmdArgs, options::OPT_mfentry);
4492 
4493  // -flax-vector-conversions is default.
4494  if (!Args.hasFlag(options::OPT_flax_vector_conversions,
4495  options::OPT_fno_lax_vector_conversions))
4496  CmdArgs.push_back("-fno-lax-vector-conversions");
4497 
4498  if (Args.getLastArg(options::OPT_fapple_kext) ||
4499  (Args.hasArg(options::OPT_mkernel) && types::isCXX(InputType)))
4500  CmdArgs.push_back("-fapple-kext");
4501 
4502  Args.AddLastArg(CmdArgs, options::OPT_fobjc_sender_dependent_dispatch);
4503  Args.AddLastArg(CmdArgs, options::OPT_fdiagnostics_print_source_range_info);
4504  Args.AddLastArg(CmdArgs, options::OPT_fdiagnostics_parseable_fixits);
4505  Args.AddLastArg(CmdArgs, options::OPT_ftime_report);
4506  Args.AddLastArg(CmdArgs, options::OPT_ftrapv);
4507 
4508  if (Arg *A = Args.getLastArg(options::OPT_ftrapv_handler_EQ)) {
4509  CmdArgs.push_back("-ftrapv-handler");
4510  CmdArgs.push_back(A->getValue());
4511  }
4512 
4513  Args.AddLastArg(CmdArgs, options::OPT_ftrap_function_EQ);
4514 
4515  // -fno-strict-overflow implies -fwrapv if it isn't disabled, but
4516  // -fstrict-overflow won't turn off an explicitly enabled -fwrapv.
4517  if (Arg *A = Args.getLastArg(options::OPT_fwrapv, options::OPT_fno_wrapv)) {
4518  if (A->getOption().matches(options::OPT_fwrapv))
4519  CmdArgs.push_back("-fwrapv");
4520  } else if (Arg *A = Args.getLastArg(options::OPT_fstrict_overflow,
4521  options::OPT_fno_strict_overflow)) {
4522  if (A->getOption().matches(options::OPT_fno_strict_overflow))
4523  CmdArgs.push_back("-fwrapv");
4524  }
4525 
4526  if (Arg *A = Args.getLastArg(options::OPT_freroll_loops,
4527  options::OPT_fno_reroll_loops))
4528  if (A->getOption().matches(options::OPT_freroll_loops))
4529  CmdArgs.push_back("-freroll-loops");
4530 
4531  Args.AddLastArg(CmdArgs, options::OPT_fwritable_strings);
4532  Args.AddLastArg(CmdArgs, options::OPT_funroll_loops,
4533  options::OPT_fno_unroll_loops);
4534 
4535  Args.AddLastArg(CmdArgs, options::OPT_pthread);
4536 
4537  if (Args.hasFlag(options::OPT_mspeculative_load_hardening, options::OPT_mno_speculative_load_hardening,
4538  false))
4539  CmdArgs.push_back(Args.MakeArgString("-mspeculative-load-hardening"));
4540 
4541  RenderSSPOptions(TC, Args, CmdArgs, KernelOrKext);
4542  RenderTrivialAutoVarInitOptions(D, TC, Args, CmdArgs);
4543 
4544  // Translate -mstackrealign
4545  if (Args.hasFlag(options::OPT_mstackrealign, options::OPT_mno_stackrealign,
4546  false))
4547  CmdArgs.push_back(Args.MakeArgString("-mstackrealign"));
4548 
4549  if (Args.hasArg(options::OPT_mstack_alignment)) {
4550  StringRef alignment = Args.getLastArgValue(options::OPT_mstack_alignment);
4551  CmdArgs.push_back(Args.MakeArgString("-mstack-alignment=" + alignment));
4552  }
4553 
4554  if (Args.hasArg(options::OPT_mstack_probe_size)) {
4555  StringRef Size = Args.getLastArgValue(options::OPT_mstack_probe_size);
4556 
4557  if (!Size.empty())
4558  CmdArgs.push_back(Args.MakeArgString("-mstack-probe-size=" + Size));
4559  else
4560  CmdArgs.push_back("-mstack-probe-size=0");
4561  }
4562 
4563  if (!Args.hasFlag(options::OPT_mstack_arg_probe,
4564  options::OPT_mno_stack_arg_probe, true))
4565  CmdArgs.push_back(Args.MakeArgString("-mno-stack-arg-probe"));
4566 
4567  if (Arg *A = Args.getLastArg(options::OPT_mrestrict_it,
4568  options::OPT_mno_restrict_it)) {
4569  if (A->getOption().matches(options::OPT_mrestrict_it)) {
4570  CmdArgs.push_back("-mllvm");
4571  CmdArgs.push_back("-arm-restrict-it");
4572  } else {
4573  CmdArgs.push_back("-mllvm");
4574  CmdArgs.push_back("-arm-no-restrict-it");
4575  }
4576  } else if (Triple.isOSWindows() &&
4577  (Triple.getArch() == llvm::Triple::arm ||
4578  Triple.getArch() == llvm::Triple::thumb)) {
4579  // Windows on ARM expects restricted IT blocks
4580  CmdArgs.push_back("-mllvm");
4581  CmdArgs.push_back("-arm-restrict-it");
4582  }
4583 
4584  // Forward -cl options to -cc1
4585  RenderOpenCLOptions(Args, CmdArgs);
4586 
4587  if (Arg *A = Args.getLastArg(options::OPT_fcf_protection_EQ)) {
4588  CmdArgs.push_back(
4589  Args.MakeArgString(Twine("-fcf-protection=") + A->getValue()));
4590  }
4591 
4592  // Forward -f options with positive and negative forms; we translate
4593  // these by hand.
4594  if (Arg *A = getLastProfileSampleUseArg(Args)) {
4595  StringRef fname = A->getValue();
4596  if (!llvm::sys::fs::exists(fname))
4597  D.Diag(diag::err_drv_no_such_file) << fname;
4598  else
4599  A->render(Args, CmdArgs);
4600  }
4601  Args.AddLastArg(CmdArgs, options::OPT_fprofile_remapping_file_EQ);
4602 
4603  RenderBuiltinOptions(TC, RawTriple, Args, CmdArgs);
4604 
4605  if (!Args.hasFlag(options::OPT_fassume_sane_operator_new,
4606  options::OPT_fno_assume_sane_operator_new))
4607  CmdArgs.push_back("-fno-assume-sane-operator-new");
4608 
4609  // -fblocks=0 is default.
4610  if (Args.hasFlag(options::OPT_fblocks, options::OPT_fno_blocks,
4611  TC.IsBlocksDefault()) ||
4612  (Args.hasArg(options::OPT_fgnu_runtime) &&
4613  Args.hasArg(options::OPT_fobjc_nonfragile_abi) &&
4614  !Args.hasArg(options::OPT_fno_blocks))) {
4615  CmdArgs.push_back("-fblocks");
4616 
4617  if (!Args.hasArg(options::OPT_fgnu_runtime) && !TC.hasBlocksRuntime())
4618  CmdArgs.push_back("-fblocks-runtime-optional");
4619  }
4620 
4621  // -fencode-extended-block-signature=1 is default.
4622  if (TC.IsEncodeExtendedBlockSignatureDefault())
4623  CmdArgs.push_back("-fencode-extended-block-signature");
4624 
4625  if (Args.hasFlag(options::OPT_fcoroutines_ts, options::OPT_fno_coroutines_ts,
4626  false) &&
4627  types::isCXX(InputType)) {
4628  CmdArgs.push_back("-fcoroutines-ts");
4629  }
4630 
4631  Args.AddLastArg(CmdArgs, options::OPT_fdouble_square_bracket_attributes,
4632  options::OPT_fno_double_square_bracket_attributes);
4633 
4634  bool HaveModules = false;
4635  RenderModulesOptions(C, D, Args, Input, Output, CmdArgs, HaveModules);
4636 
4637  // -faccess-control is default.
4638  if (Args.hasFlag(options::OPT_fno_access_control,
4639  options::OPT_faccess_control, false))
4640  CmdArgs.push_back("-fno-access-control");
4641 
4642  // -felide-constructors is the default.
4643  if (Args.hasFlag(options::OPT_fno_elide_constructors,
4644  options::OPT_felide_constructors, false))
4645  CmdArgs.push_back("-fno-elide-constructors");
4646 
4647  ToolChain::RTTIMode RTTIMode = TC.getRTTIMode();
4648 
4649  if (KernelOrKext || (types::isCXX(InputType) &&
4650  (RTTIMode == ToolChain::RM_Disabled)))
4651  CmdArgs.push_back("-fno-rtti");
4652 
4653  // -fshort-enums=0 is default for all architectures except Hexagon.
4654  if (Args.hasFlag(options::OPT_fshort_enums, options::OPT_fno_short_enums,
4655  TC.getArch() == llvm::Triple::hexagon))
4656  CmdArgs.push_back("-fshort-enums");
4657 
4658  RenderCharacterOptions(Args, AuxTriple ? *AuxTriple : RawTriple, CmdArgs);
4659 
4660  // -fuse-cxa-atexit is default.
4661  if (!Args.hasFlag(
4662  options::OPT_fuse_cxa_atexit, options::OPT_fno_use_cxa_atexit,
4663  !RawTriple.isOSWindows() &&
4664  RawTriple.getOS() != llvm::Triple::Solaris &&
4665  TC.getArch() != llvm::Triple::xcore &&
4666  ((RawTriple.getVendor() != llvm::Triple::MipsTechnologies) ||
4667  RawTriple.hasEnvironment())) ||
4668  KernelOrKext)
4669  CmdArgs.push_back("-fno-use-cxa-atexit");
4670 
4671  if (Args.hasFlag(options::OPT_fregister_global_dtors_with_atexit,
4672  options::OPT_fno_register_global_dtors_with_atexit,
4673  RawTriple.isOSDarwin() && !KernelOrKext))
4674  CmdArgs.push_back("-fregister-global-dtors-with-atexit");
4675 
4676  // -fms-extensions=0 is default.
4677  if (Args.hasFlag(options::OPT_fms_extensions, options::OPT_fno_ms_extensions,
4678  IsWindowsMSVC))
4679  CmdArgs.push_back("-fms-extensions");
4680 
4681  // -fno-use-line-directives is default.
4682  if (Args.hasFlag(options::OPT_fuse_line_directives,
4683  options::OPT_fno_use_line_directives, false))
4684  CmdArgs.push_back("-fuse-line-directives");
4685 
4686  // -fms-compatibility=0 is default.
4687  if (Args.hasFlag(options::OPT_fms_compatibility,
4688  options::OPT_fno_ms_compatibility,
4689  (IsWindowsMSVC &&
4690  Args.hasFlag(options::OPT_fms_extensions,
4691  options::OPT_fno_ms_extensions, true))))
4692  CmdArgs.push_back("-fms-compatibility");
4693 
4694  VersionTuple MSVT = TC.computeMSVCVersion(&D, Args);
4695  if (!MSVT.empty())
4696  CmdArgs.push_back(
4697  Args.MakeArgString("-fms-compatibility-version=" + MSVT.getAsString()));
4698 
4699  bool IsMSVC2015Compatible = MSVT.getMajor() >= 19;
4700  if (ImplyVCPPCXXVer) {
4701  StringRef LanguageStandard;
4702  if (const Arg *StdArg = Args.getLastArg(options::OPT__SLASH_std)) {
4703  LanguageStandard = llvm::StringSwitch<StringRef>(StdArg->getValue())
4704  .Case("c++14", "-std=c++14")
4705  .Case("c++17", "-std=c++17")
4706  .Case("c++latest", "-std=c++2a")
4707  .Default("");
4708  if (LanguageStandard.empty())
4709  D.Diag(clang::diag::warn_drv_unused_argument)
4710  << StdArg->getAsString(Args);
4711  }
4712 
4713  if (LanguageStandard.empty()) {
4714  if (IsMSVC2015Compatible)
4715  LanguageStandard = "-std=c++14";
4716  else
4717  LanguageStandard = "-std=c++11";
4718  }
4719 
4720  CmdArgs.push_back(LanguageStandard.data());
4721  }
4722 
4723  // -fno-borland-extensions is default.
4724  if (Args.hasFlag(options::OPT_fborland_extensions,
4725  options::OPT_fno_borland_extensions, false))
4726  CmdArgs.push_back("-fborland-extensions");
4727 
4728  // -fno-declspec is default, except for PS4.
4729  if (Args.hasFlag(options::OPT_fdeclspec, options::OPT_fno_declspec,
4730  RawTriple.isPS4()))
4731  CmdArgs.push_back("-fdeclspec");
4732  else if (Args.hasArg(options::OPT_fno_declspec))
4733  CmdArgs.push_back("-fno-declspec"); // Explicitly disabling __declspec.
4734 
4735  // -fthreadsafe-static is default, except for MSVC compatibility versions less
4736  // than 19.
4737  if (!Args.hasFlag(options::OPT_fthreadsafe_statics,
4738  options::OPT_fno_threadsafe_statics,
4739  !IsWindowsMSVC || IsMSVC2015Compatible))
4740  CmdArgs.push_back("-fno-threadsafe-statics");
4741 
4742  // -fno-delayed-template-parsing is default, except when targeting MSVC.
4743  // Many old Windows SDK versions require this to parse.
4744  // FIXME: MSVC introduced /Zc:twoPhase- to disable this behavior in their
4745  // compiler. We should be able to disable this by default at some point.
4746  if (Args.hasFlag(options::OPT_fdelayed_template_parsing,
4747  options::OPT_fno_delayed_template_parsing, IsWindowsMSVC))
4748  CmdArgs.push_back("-fdelayed-template-parsing");
4749 
4750  // -fgnu-keywords default varies depending on language; only pass if
4751  // specified.
4752  if (Arg *A = Args.getLastArg(options::OPT_fgnu_keywords,
4753  options::OPT_fno_gnu_keywords))
4754  A->render(Args, CmdArgs);
4755 
4756  if (Args.hasFlag(options::OPT_fgnu89_inline, options::OPT_fno_gnu89_inline,
4757  false))
4758  CmdArgs.push_back("-fgnu89-inline");
4759 
4760  if (Args.hasArg(options::OPT_fno_inline))
4761  CmdArgs.push_back("-fno-inline");
4762 
4763  if (Arg* InlineArg = Args.getLastArg(options::OPT_finline_functions,
4764  options::OPT_finline_hint_functions,
4765  options::OPT_fno_inline_functions))
4766  InlineArg->render(Args, CmdArgs);
4767 
4768  Args.AddLastArg(CmdArgs, options::OPT_fexperimental_new_pass_manager,
4769  options::OPT_fno_experimental_new_pass_manager);
4770 
4771  ObjCRuntime Runtime = AddObjCRuntimeArgs(Args, CmdArgs, rewriteKind);
4772  RenderObjCOptions(TC, D, RawTriple, Args, Runtime, rewriteKind != RK_None,
4773  Input, CmdArgs);
4774 
4775  if (Args.hasFlag(options::OPT_fapplication_extension,
4776  options::OPT_fno_application_extension, false))
4777  CmdArgs.push_back("-fapplication-extension");
4778 
4779  // Handle GCC-style exception args.
4780  if (!C.getDriver().IsCLMode())
4781  addExceptionArgs(Args, InputType, TC, KernelOrKext, Runtime, CmdArgs);
4782 
4783  // Handle exception personalities
4784  Arg *A = Args.getLastArg(options::OPT_fsjlj_exceptions,
4785  options::OPT_fseh_exceptions,
4786  options::OPT_fdwarf_exceptions);
4787  if (A) {
4788  const Option &Opt = A->getOption();
4789  if (Opt.matches(options::OPT_fsjlj_exceptions))
4790  CmdArgs.push_back("-fsjlj-exceptions");
4791  if (Opt.matches(options::OPT_fseh_exceptions))
4792  CmdArgs.push_back("-fseh-exceptions");
4793  if (Opt.matches(options::OPT_fdwarf_exceptions))
4794  CmdArgs.push_back("-fdwarf-exceptions");
4795  } else {
4796  switch (TC.GetExceptionModel(Args)) {
4797  default:
4798  break;
4799  case llvm::ExceptionHandling::DwarfCFI:
4800  CmdArgs.push_back("-fdwarf-exceptions");
4801  break;
4802  case llvm::ExceptionHandling::SjLj:
4803  CmdArgs.push_back("-fsjlj-exceptions");
4804  break;
4805  case llvm::ExceptionHandling::WinEH:
4806  CmdArgs.push_back("-fseh-exceptions");
4807  break;
4808  }
4809  }
4810 
4811  // C++ "sane" operator new.
4812  if (!Args.hasFlag(options::OPT_fassume_sane_operator_new,
4813  options::OPT_fno_assume_sane_operator_new))
4814  CmdArgs.push_back("-fno-assume-sane-operator-new");
4815 
4816  // -frelaxed-template-template-args is off by default, as it is a severe
4817  // breaking change until a corresponding change to template partial ordering
4818  // is provided.
4819  if (Args.hasFlag(options::OPT_frelaxed_template_template_args,
4820  options::OPT_fno_relaxed_template_template_args, false))
4821  CmdArgs.push_back("-frelaxed-template-template-args");
4822 
4823  // -fsized-deallocation is off by default, as it is an ABI-breaking change for
4824  // most platforms.
4825  if (Args.hasFlag(options::OPT_fsized_deallocation,
4826  options::OPT_fno_sized_deallocation, false))
4827  CmdArgs.push_back("-fsized-deallocation");
4828 
4829  // -faligned-allocation is on by default in C++17 onwards and otherwise off
4830  // by default.
4831  if (Arg *A = Args.getLastArg(options::OPT_faligned_allocation,
4832  options::OPT_fno_aligned_allocation,
4833  options::OPT_faligned_new_EQ)) {
4834  if (A->getOption().matches(options::OPT_fno_aligned_allocation))
4835  CmdArgs.push_back("-fno-aligned-allocation");
4836  else
4837  CmdArgs.push_back("-faligned-allocation");
4838  }
4839 
4840  // The default new alignment can be specified using a dedicated option or via
4841  // a GCC-compatible option that also turns on aligned allocation.
4842  if (Arg *A = Args.getLastArg(options::OPT_fnew_alignment_EQ,
4843  options::OPT_faligned_new_EQ))
4844  CmdArgs.push_back(
4845  Args.MakeArgString(Twine("-fnew-alignment=") + A->getValue()));
4846 
4847  // -fconstant-cfstrings is default, and may be subject to argument translation
4848  // on Darwin.
4849  if (!Args.hasFlag(options::OPT_fconstant_cfstrings,
4850  options::OPT_fno_constant_cfstrings) ||
4851  !Args.hasFlag(options::OPT_mconstant_cfstrings,
4852  options::OPT_mno_constant_cfstrings))
4853  CmdArgs.push_back("-fno-constant-cfstrings");
4854 
4855  // -fno-pascal-strings is default, only pass non-default.
4856  if (Args.hasFlag(options::OPT_fpascal_strings,
4857  options::OPT_fno_pascal_strings, false))
4858  CmdArgs.push_back("-fpascal-strings");
4859 
4860  // Honor -fpack-struct= and -fpack-struct, if given. Note that
4861  // -fno-pack-struct doesn't apply to -fpack-struct=.
4862  if (Arg *A = Args.getLastArg(options::OPT_fpack_struct_EQ)) {
4863  std::string PackStructStr = "-fpack-struct=";
4864  PackStructStr += A->getValue();
4865  CmdArgs.push_back(Args.MakeArgString(PackStructStr));
4866  } else if (Args.hasFlag(options::OPT_fpack_struct,
4867  options::OPT_fno_pack_struct, false)) {
4868  CmdArgs.push_back("-fpack-struct=1");
4869  }
4870 
4871  // Handle -fmax-type-align=N and -fno-type-align
4872  bool SkipMaxTypeAlign = Args.hasArg(options::OPT_fno_max_type_align);
4873  if (Arg *A = Args.getLastArg(options::OPT_fmax_type_align_EQ)) {
4874  if (!SkipMaxTypeAlign) {
4875  std::string MaxTypeAlignStr = "-fmax-type-align=";
4876  MaxTypeAlignStr += A->getValue();
4877  CmdArgs.push_back(Args.MakeArgString(MaxTypeAlignStr));
4878  }
4879  } else if (RawTriple.isOSDarwin()) {
4880  if (!SkipMaxTypeAlign) {
4881  std::string MaxTypeAlignStr = "-fmax-type-align=16";
4882  CmdArgs.push_back(Args.MakeArgString(MaxTypeAlignStr));
4883  }
4884  }
4885 
4886  if (!Args.hasFlag(options::OPT_Qy, options::OPT_Qn, true))
4887  CmdArgs.push_back("-Qn");
4888 
4889  // -fcommon is the default unless compiling kernel code or the target says so
4890  bool NoCommonDefault = KernelOrKext || isNoCommonDefault(RawTriple);
4891  if (!Args.hasFlag(options::OPT_fcommon, options::OPT_fno_common,
4892  !NoCommonDefault))
4893  CmdArgs.push_back("-fno-common");
4894 
4895  // -fsigned-bitfields is default, and clang doesn't yet support
4896  // -funsigned-bitfields.
4897  if (!Args.hasFlag(options::OPT_fsigned_bitfields,
4898  options::OPT_funsigned_bitfields))
4899  D.Diag(diag::warn_drv_clang_unsupported)
4900  << Args.getLastArg(options::OPT_funsigned_bitfields)->getAsString(Args);
4901 
4902  // -fsigned-bitfields is default, and clang doesn't support -fno-for-scope.
4903  if (!Args.hasFlag(options::OPT_ffor_scope, options::OPT_fno_for_scope))
4904  D.Diag(diag::err_drv_clang_unsupported)
4905  << Args.getLastArg(options::OPT_fno_for_scope)->getAsString(Args);
4906 
4907  // -finput_charset=UTF-8 is default. Reject others
4908  if (Arg *inputCharset = Args.getLastArg(options::OPT_finput_charset_EQ)) {
4909  StringRef value = inputCharset->getValue();
4910  if (!value.equals_lower("utf-8"))
4911  D.Diag(diag::err_drv_invalid_value) << inputCharset->getAsString(Args)
4912  << value;
4913  }
4914 
4915  // -fexec_charset=UTF-8 is default. Reject others
4916  if (Arg *execCharset = Args.getLastArg(options::OPT_fexec_charset_EQ)) {
4917  StringRef value = execCharset->getValue();
4918  if (!value.equals_lower("utf-8"))
4919  D.Diag(diag::err_drv_invalid_value) << execCharset->getAsString(Args)
4920  << value;
4921  }
4922 
4923  RenderDiagnosticsOptions(D, Args, CmdArgs);
4924 
4925  // -fno-asm-blocks is default.
4926  if (Args.hasFlag(options::OPT_fasm_blocks, options::OPT_fno_asm_blocks,
4927  false))
4928  CmdArgs.push_back("-fasm-blocks");
4929 
4930  // -fgnu-inline-asm is default.
4931  if (!Args.hasFlag(options::OPT_fgnu_inline_asm,
4932  options::OPT_fno_gnu_inline_asm, true))
4933  CmdArgs.push_back("-fno-gnu-inline-asm");
4934 
4935  // Enable vectorization per default according to the optimization level
4936  // selected. For optimization levels that want vectorization we use the alias
4937  // option to simplify the hasFlag logic.
4938  bool EnableVec = shouldEnableVectorizerAtOLevel(Args, false);
4939  OptSpecifier VectorizeAliasOption =
4940  EnableVec ? options::OPT_O_Group : options::OPT_fvectorize;
4941  if (Args.hasFlag(options::OPT_fvectorize, VectorizeAliasOption,
4942  options::OPT_fno_vectorize, EnableVec))
4943  CmdArgs.push_back("-vectorize-loops");
4944 
4945  // -fslp-vectorize is enabled based on the optimization level selected.
4946  bool EnableSLPVec = shouldEnableVectorizerAtOLevel(Args, true);
4947  OptSpecifier SLPVectAliasOption =
4948  EnableSLPVec ? options::OPT_O_Group : options::OPT_fslp_vectorize;
4949  if (Args.hasFlag(options::OPT_fslp_vectorize, SLPVectAliasOption,
4950  options::OPT_fno_slp_vectorize, EnableSLPVec))
4951  CmdArgs.push_back("-vectorize-slp");
4952 
4953  ParseMPreferVectorWidth(D, Args, CmdArgs);
4954 
4955  if (Arg *A = Args.getLastArg(options::OPT_fshow_overloads_EQ))
4956  A->render(Args, CmdArgs);
4957 
4958  if (Arg *A = Args.getLastArg(
4959  options::OPT_fsanitize_undefined_strip_path_components_EQ))
4960  A->render(Args, CmdArgs);
4961 
4962  // -fdollars-in-identifiers default varies depending on platform and
4963  // language; only pass if specified.
4964  if (Arg *A = Args.getLastArg(options::OPT_fdollars_in_identifiers,
4965  options::OPT_fno_dollars_in_identifiers)) {
4966  if (A->getOption().matches(options::OPT_fdollars_in_identifiers))
4967  CmdArgs.push_back("-fdollars-in-identifiers");
4968  else
4969  CmdArgs.push_back("-fno-dollars-in-identifiers");
4970  }
4971 
4972  // -funit-at-a-time is default, and we don't support -fno-unit-at-a-time for
4973  // practical purposes.
4974  if (Arg *A = Args.getLastArg(options::OPT_funit_at_a_time,
4975  options::OPT_fno_unit_at_a_time)) {
4976  if (A->getOption().matches(options::OPT_fno_unit_at_a_time))
4977  D.Diag(diag::warn_drv_clang_unsupported) << A->getAsString(Args);
4978  }
4979 
4980  if (Args.hasFlag(options::OPT_fapple_pragma_pack,
4981  options::OPT_fno_apple_pragma_pack, false))
4982  CmdArgs.push_back("-fapple-pragma-pack");
4983 
4984  if (Args.hasFlag(options::OPT_fsave_optimization_record,
4985  options::OPT_foptimization_record_file_EQ,
4986  options::OPT_fno_save_optimization_record, false)) {
4987  CmdArgs.push_back("-opt-record-file");
4988 
4989  const Arg *A = Args.getLastArg(options::OPT_foptimization_record_file_EQ);
4990  if (A) {
4991  CmdArgs.push_back(A->getValue());
4992  } else {
4993  SmallString<128> F;
4994 
4995  if (Args.hasArg(options::OPT_c) || Args.hasArg(options::OPT_S)) {
4996  if (Arg *FinalOutput = Args.getLastArg(options::OPT_o))
4997  F = FinalOutput->getValue();
4998  }
4999 
5000  if (F.empty()) {
5001  // Use the input filename.
5002  F = llvm::sys::path::stem(Input.getBaseInput());
5003 
5004  // If we're compiling for an offload architecture (i.e. a CUDA device),
5005  // we need to make the file name for the device compilation different
5006  // from the host compilation.
5009  llvm::sys::path::replace_extension(F, "");
5011  Triple.normalize());
5012  F += "-";
5013  F += JA.getOffloadingArch();
5014  }
5015  }
5016 
5017  llvm::sys::path::replace_extension(F, "opt.yaml");
5018  CmdArgs.push_back(Args.MakeArgString(F));
5019  }
5020  }
5021 
5022  bool RewriteImports = Args.hasFlag(options::OPT_frewrite_imports,
5023  options::OPT_fno_rewrite_imports, false);
5024  if (RewriteImports)
5025  CmdArgs.push_back("-frewrite-imports");
5026 
5027  // Enable rewrite includes if the user's asked for it or if we're generating
5028  // diagnostics.
5029  // TODO: Once -module-dependency-dir works with -frewrite-includes it'd be
5030  // nice to enable this when doing a crashdump for modules as well.
5031  if (Args.hasFlag(options::OPT_frewrite_includes,
5032  options::OPT_fno_rewrite_includes, false) ||
5033  (C.isForDiagnostics() && !HaveModules))
5034  CmdArgs.push_back("-frewrite-includes");
5035 
5036  // Only allow -traditional or -traditional-cpp outside in preprocessing modes.
5037  if (Arg *A = Args.getLastArg(options::OPT_traditional,
5038  options::OPT_traditional_cpp)) {
5039  if (isa<PreprocessJobAction>(JA))
5040  CmdArgs.push_back("-traditional-cpp");
5041  else
5042  D.Diag(diag::err_drv_clang_unsupported) << A->getAsString(Args);
5043  }
5044 
5045  Args.AddLastArg(CmdArgs, options::OPT_dM);
5046  Args.AddLastArg(CmdArgs, options::OPT_dD);
5047 
5048  // Handle serialized diagnostics.
5049  if (Arg *A = Args.getLastArg(options::OPT__serialize_diags)) {
5050  CmdArgs.push_back("-serialize-diagnostic-file");
5051  CmdArgs.push_back(Args.MakeArgString(A->getValue()));
5052  }
5053 
5054  if (Args.hasArg(options::OPT_fretain_comments_from_system_headers))
5055  CmdArgs.push_back("-fretain-comments-from-system-headers");
5056 
5057  // Forward -fcomment-block-commands to -cc1.
5058  Args.AddAllArgs(CmdArgs, options::OPT_fcomment_block_commands);
5059  // Forward -fparse-all-comments to -cc1.
5060  Args.AddAllArgs(CmdArgs, options::OPT_fparse_all_comments);
5061 
5062  // Turn -fplugin=name.so into -load name.so
5063  for (const Arg *A : Args.filtered(options::OPT_fplugin_EQ)) {
5064  CmdArgs.push_back("-load");
5065  CmdArgs.push_back(A->getValue());
5066  A->claim();
5067  }
5068 
5069  // Setup statistics file output.
5070  SmallString<128> StatsFile = getStatsFileName(Args, Output, Input, D);
5071  if (!StatsFile.empty())
5072  CmdArgs.push_back(Args.MakeArgString(Twine("-stats-file=") + StatsFile));
5073 
5074  // Forward -Xclang arguments to -cc1, and -mllvm arguments to the LLVM option
5075  // parser.
5076  // -finclude-default-header flag is for preprocessor,
5077  // do not pass it to other cc1 commands when save-temps is enabled
5078  if (C.getDriver().isSaveTempsEnabled() &&
5079  !isa<PreprocessJobAction>(JA)) {
5080  for (auto Arg : Args.filtered(options::OPT_Xclang)) {
5081  Arg->claim();
5082  if (StringRef(Arg->getValue()) != "-finclude-default-header")
5083  CmdArgs.push_back(Arg->getValue());
5084  }
5085  }
5086  else {
5087  Args.AddAllArgValues(CmdArgs, options::OPT_Xclang);
5088  }
5089  for (const Arg *A : Args.filtered(options::OPT_mllvm)) {
5090  A->claim();
5091 
5092  // We translate this by hand to the -cc1 argument, since nightly test uses
5093  // it and developers have been trained to spell it with -mllvm. Both
5094  // spellings are now deprecated and should be removed.
5095  if (StringRef(A->getValue(0)) == "-disable-llvm-optzns") {
5096  CmdArgs.push_back("-disable-llvm-optzns");
5097  } else {
5098  A->render(Args, CmdArgs);
5099  }
5100  }
5101 
5102  // With -save-temps, we want to save the unoptimized bitcode output from the
5103  // CompileJobAction, use -disable-llvm-passes to get pristine IR generated
5104  // by the frontend.
5105  // When -fembed-bitcode is enabled, optimized bitcode is emitted because it
5106  // has slightly different breakdown between stages.
5107  // FIXME: -fembed-bitcode -save-temps will save optimized bitcode instead of
5108  // pristine IR generated by the frontend. Ideally, a new compile action should
5109  // be added so both IR can be captured.
5110  if (C.getDriver().isSaveTempsEnabled() &&
5111  !(C.getDriver().embedBitcodeInObject() && !C.getDriver().isUsingLTO()) &&
5112  isa<CompileJobAction>(JA))
5113  CmdArgs.push_back("-disable-llvm-passes");
5114 
5115  if (Output.getType() == types::TY_Dependencies) {
5116  // Handled with other dependency code.
5117  } else if (Output.isFilename()) {
5118  CmdArgs.push_back("-o");
5119  CmdArgs.push_back(Output.getFilename());
5120  } else {
5121  assert(Output.isNothing() && "Invalid output.");
5122  }
5123 
5124  addDashXForInput(Args, Input, CmdArgs);
5125 
5126  ArrayRef<InputInfo> FrontendInputs = Input;
5127  if (IsHeaderModulePrecompile)
5128  FrontendInputs = ModuleHeaderInputs;
5129  else if (Input.isNothing())
5130  FrontendInputs = {};
5131 
5132  for (const InputInfo &Input : FrontendInputs) {
5133  if (Input.isFilename())
5134  CmdArgs.push_back(Input.getFilename());
5135  else
5136  Input.getInputArg().renderAsInput(Args, CmdArgs);
5137  }
5138 
5139  Args.AddAllArgs(CmdArgs, options::OPT_undef);
5140 
5141  const char *Exec = D.getClangProgramPath();
5142 
5143  // Optionally embed the -cc1 level arguments into the debug info or a
5144  // section, for build analysis.
5145  // Also record command line arguments into the debug info if
5146  // -grecord-gcc-switches options is set on.
5147  // By default, -gno-record-gcc-switches is set on and no recording.
5148  auto GRecordSwitches =
5149  Args.hasFlag(options::OPT_grecord_command_line,
5150  options::OPT_gno_record_command_line, false);
5151  auto FRecordSwitches =
5152  Args.hasFlag(options::OPT_frecord_command_line,
5153  options::OPT_fno_record_command_line, false);
5154  if (FRecordSwitches && !Triple.isOSBinFormatELF())
5155  D.Diag(diag::err_drv_unsupported_opt_for_target)
5156  << Args.getLastArg(options::OPT_frecord_command_line)->getAsString(Args)
5157  << TripleStr;
5158  if (TC.UseDwarfDebugFlags() || GRecordSwitches || FRecordSwitches) {
5159  ArgStringList OriginalArgs;
5160  for (const auto &Arg : Args)
5161  Arg->render(Args, OriginalArgs);
5162 
5163  SmallString<256> Flags;
5164  Flags += Exec;
5165  for (const char *OriginalArg : OriginalArgs) {
5166  SmallString<128> EscapedArg;
5167  EscapeSpacesAndBackslashes(OriginalArg, EscapedArg);
5168  Flags += " ";
5169  Flags += EscapedArg;
5170  }
5171  auto FlagsArgString = Args.MakeArgString(Flags);
5172  if (TC.UseDwarfDebugFlags() || GRecordSwitches) {
5173  CmdArgs.push_back("-dwarf-debug-flags");
5174  CmdArgs.push_back(FlagsArgString);
5175  }
5176  if (FRecordSwitches) {
5177  CmdArgs.push_back("-record-command-line");
5178  CmdArgs.push_back(FlagsArgString);
5179  }
5180  }
5181 
5182  // Host-side cuda compilation receives all device-side outputs in a single
5183  // fatbin as Inputs[1]. Include the binary with -fcuda-include-gpubinary.
5184  if ((IsCuda || IsHIP) && CudaDeviceInput) {
5185  CmdArgs.push_back("-fcuda-include-gpubinary");
5186  CmdArgs.push_back(CudaDeviceInput->getFilename());
5187  if (Args.hasFlag(options::OPT_fgpu_rdc, options::OPT_fno_gpu_rdc, false))
5188  CmdArgs.push_back("-fgpu-rdc");
5189  }
5190 
5191  if (IsCuda) {
5192  if (Args.hasFlag(options::OPT_fcuda_short_ptr,
5193  options::OPT_fno_cuda_short_ptr, false))
5194  CmdArgs.push_back("-fcuda-short-ptr");
5195  }
5196 
5197  // OpenMP offloading device jobs take the argument -fopenmp-host-ir-file-path
5198  // to specify the result of the compile phase on the host, so the meaningful
5199  // device declarations can be identified. Also, -fopenmp-is-device is passed
5200  // along to tell the frontend that it is generating code for a device, so that
5201  // only the relevant declarations are emitted.
5202  if (IsOpenMPDevice) {
5203  CmdArgs.push_back("-fopenmp-is-device");
5204  if (OpenMPDeviceInput) {
5205  CmdArgs.push_back("-fopenmp-host-ir-file-path");
5206  CmdArgs.push_back(Args.MakeArgString(OpenMPDeviceInput->getFilename()));
5207  }
5208  }
5209 
5210  // For all the host OpenMP offloading compile jobs we need to pass the targets
5211  // information using -fopenmp-targets= option.
5213  SmallString<128> TargetInfo("-fopenmp-targets=");
5214 
5215  Arg *Tgts = Args.getLastArg(options::OPT_fopenmp_targets_EQ);
5216  assert(Tgts && Tgts->getNumValues() &&
5217  "OpenMP offloading has to have targets specified.");
5218  for (unsigned i = 0; i < Tgts->getNumValues(); ++i) {
5219  if (i)
5220  TargetInfo += ',';
5221  // We need to get the string from the triple because it may be not exactly
5222  // the same as the one we get directly from the arguments.
5223  llvm::Triple T(Tgts->getValue(i));
5224  TargetInfo += T.getTriple();
5225  }
5226  CmdArgs.push_back(Args.MakeArgString(TargetInfo.str()));
5227  }
5228 
5229  bool WholeProgramVTables =
5230  Args.hasFlag(options::OPT_fwhole_program_vtables,
5231  options::OPT_fno_whole_program_vtables, false);
5232  if (WholeProgramVTables) {
5233  if (!D.isUsingLTO())
5234  D.Diag(diag::err_drv_argument_only_allowed_with)
5235  << "-fwhole-program-vtables"
5236  << "-flto";
5237  CmdArgs.push_back("-fwhole-program-vtables");
5238  }
5239 
5240  bool RequiresSplitLTOUnit = WholeProgramVTables || Sanitize.needsLTO();
5241  bool SplitLTOUnit =
5242  Args.hasFlag(options::OPT_fsplit_lto_unit,
5243  options::OPT_fno_split_lto_unit, RequiresSplitLTOUnit);
5244  if (RequiresSplitLTOUnit && !SplitLTOUnit)
5245  D.Diag(diag::err_drv_argument_not_allowed_with)
5246  << "-fno-split-lto-unit"
5247  << (WholeProgramVTables ? "-fwhole-program-vtables" : "-fsanitize=cfi");
5248  if (SplitLTOUnit)
5249  CmdArgs.push_back("-fsplit-lto-unit");
5250 
5251  if (Arg *A = Args.getLastArg(options::OPT_fexperimental_isel,
5252  options::OPT_fno_experimental_isel)) {
5253  CmdArgs.push_back("-mllvm");
5254  if (A->getOption().matches(options::OPT_fexperimental_isel)) {
5255  CmdArgs.push_back("-global-isel=1");
5256 
5257  // GISel is on by default on AArch64 -O0, so don't bother adding
5258  // the fallback remarks for it. Other combinations will add a warning of
5259  // some kind.
5260  bool IsArchSupported = Triple.getArch() == llvm::Triple::aarch64;
5261  bool IsOptLevelSupported = false;
5262 
5263  Arg *A = Args.getLastArg(options::OPT_O_Group);
5264  if (Triple.getArch() == llvm::Triple::aarch64) {
5265  if (!A || A->getOption().matches(options::OPT_O0))
5266  IsOptLevelSupported = true;
5267  }
5268  if (!IsArchSupported || !IsOptLevelSupported) {
5269  CmdArgs.push_back("-mllvm");
5270  CmdArgs.push_back("-global-isel-abort=2");
5271 
5272  if (!IsArchSupported)
5273  D.Diag(diag::warn_drv_experimental_isel_incomplete) << Triple.getArchName();
5274  else
5275  D.Diag(diag::warn_drv_experimental_isel_incomplete_opt);
5276  }
5277  } else {
5278  CmdArgs.push_back("-global-isel=0");
5279  }
5280  }
5281 
5282  if (Arg *A = Args.getLastArg(options::OPT_fforce_enable_int128,
5283  options::OPT_fno_force_enable_int128)) {
5284  if (A->getOption().matches(options::OPT_fforce_enable_int128))
5285  CmdArgs.push_back("-fforce-enable-int128");
5286  }
5287 
5288  if (Args.hasFlag(options::OPT_fcomplete_member_pointers,
5289  options::OPT_fno_complete_member_pointers, false))
5290  CmdArgs.push_back("-fcomplete-member-pointers");
5291 
5292  if (!Args.hasFlag(options::OPT_fcxx_static_destructors,
5293  options::OPT_fno_cxx_static_destructors, true))
5294  CmdArgs.push_back("-fno-c++-static-destructors");
5295 
5296  if (Arg *A = Args.getLastArg(options::OPT_moutline,
5297  options::OPT_mno_outline)) {
5298  if (A->getOption().matches(options::OPT_moutline)) {
5299  // We only support -moutline in AArch64 right now. If we're not compiling
5300  // for AArch64, emit a warning and ignore the flag. Otherwise, add the
5301  // proper mllvm flags.
5302  if (Triple.getArch() != llvm::Triple::aarch64) {
5303  D.Diag(diag::warn_drv_moutline_unsupported_opt) << Triple.getArchName();
5304  } else {
5305  CmdArgs.push_back("-mllvm");
5306  CmdArgs.push_back("-enable-machine-outliner");
5307  }
5308  } else {
5309  // Disable all outlining behaviour.
5310  CmdArgs.push_back("-mllvm");
5311  CmdArgs.push_back("-enable-machine-outliner=never");
5312  }
5313  }
5314 
5315  if (Args.hasFlag(options::OPT_faddrsig, options::OPT_fno_addrsig,
5316  (TC.getTriple().isOSBinFormatELF() ||
5317  TC.getTriple().isOSBinFormatCOFF()) &&
5318  !TC.getTriple().isPS4() &&
5319  !TC.getTriple().isOSNetBSD() &&
5320  !Distro(D.getVFS()).IsGentoo() &&
5321  !TC.getTriple().isAndroid() &&
5322  TC.useIntegratedAs()))
5323  CmdArgs.push_back("-faddrsig");
5324 
5325  // Finally add the compile command to the compilation.
5326  if (Args.hasArg(options::OPT__SLASH_fallback) &&
5327  Output.getType() == types::TY_Object &&
5328  (InputType == types::TY_C || InputType == types::TY_CXX)) {
5329  auto CLCommand =
5330  getCLFallback()->GetCommand(C, JA, Output, Inputs, Args, LinkingOutput);
5331  C.addCommand(llvm::make_unique<FallbackCommand>(
5332  JA, *this, Exec, CmdArgs, Inputs, std::move(CLCommand)));
5333  } else if (Args.hasArg(options::OPT__SLASH_fallback) &&
5334  isa<PrecompileJobAction>(JA)) {
5335  // In /fallback builds, run the main compilation even if the pch generation
5336  // fails, so that the main compilation's fallback to cl.exe runs.
5337  C.addCommand(llvm::make_unique<ForceSuccessCommand>(JA, *this, Exec,
5338  CmdArgs, Inputs));
5339  } else {
5340  C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
5341  }
5342 
5343  // Make the compile command echo its inputs for /showFilenames.
5344  if (Output.getType() == types::TY_Object &&
5345  Args.hasFlag(options::OPT__SLASH_showFilenames,
5346  options::OPT__SLASH_showFilenames_, false)) {
5347  C.getJobs().getJobs().back()->setPrintInputFilenames(true);
5348  }
5349 
5350  if (Arg *A = Args.getLastArg(options::OPT_pg))
5351  if (!shouldUseFramePointer(Args, Triple))
5352  D.Diag(diag::err_drv_argument_not_allowed_with) << "-fomit-frame-pointer"
5353  << A->getAsString(Args);
5354 
5355  // Claim some arguments which clang supports automatically.
5356 
5357  // -fpch-preprocess is used with gcc to add a special marker in the output to
5358  // include the PCH file.
5359  Args.ClaimAllArgs(options::OPT_fpch_preprocess);
5360 
5361  // Claim some arguments which clang doesn't support, but we don't
5362  // care to warn the user about.
5363  Args.ClaimAllArgs(options::OPT_clang_ignored_f_Group);
5364  Args.ClaimAllArgs(options::OPT_clang_ignored_m_Group);
5365 
5366  // Disable warnings for clang -E -emit-llvm foo.c
5367  Args.ClaimAllArgs(options::OPT_emit_llvm);
5368 }
5369 
5371  // CAUTION! The first constructor argument ("clang") is not arbitrary,
5372  // as it is for other tools. Some operations on a Tool actually test
5373  // whether that tool is Clang based on the Tool's Name as a string.
5374  : Tool("clang", "clang frontend", TC, RF_Full) {}
5375 
5377 
5378 /// Add options related to the Objective-C runtime/ABI.
5379 ///
5380 /// Returns true if the runtime is non-fragile.
5381 ObjCRuntime Clang::AddObjCRuntimeArgs(const ArgList &args,
5382  ArgStringList &cmdArgs,
5383  RewriteKind rewriteKind) const {
5384  // Look for the controlling runtime option.
5385  Arg *runtimeArg =
5386  args.getLastArg(options::OPT_fnext_runtime, options::OPT_fgnu_runtime,
5387  options::OPT_fobjc_runtime_EQ);
5388 
5389  // Just forward -fobjc-runtime= to the frontend. This supercedes
5390  // options about fragility.
5391  if (runtimeArg &&
5392  runtimeArg->getOption().matches(options::OPT_fobjc_runtime_EQ)) {
5393  ObjCRuntime runtime;
5394  StringRef value = runtimeArg->getValue();
5395  if (runtime.tryParse(value)) {
5396  getToolChain().getDriver().Diag(diag::err_drv_unknown_objc_runtime)
5397  << value;
5398  }
5399  if ((runtime.getKind() == ObjCRuntime::GNUstep) &&
5400  (runtime.getVersion() >= VersionTuple(2, 0)))
5401  if (!getToolChain().getTriple().isOSBinFormatELF() &&
5402  !getToolChain().getTriple().isOSBinFormatCOFF()) {
5404  diag::err_drv_gnustep_objc_runtime_incompatible_binary)
5405  << runtime.getVersion().getMajor();
5406  }
5407 
5408  runtimeArg->render(args, cmdArgs);
5409  return runtime;
5410  }
5411 
5412  // Otherwise, we'll need the ABI "version". Version numbers are
5413  // slightly confusing for historical reasons:
5414  // 1 - Traditional "fragile" ABI
5415  // 2 - Non-fragile ABI, version 1
5416  // 3 - Non-fragile ABI, version 2
5417  unsigned objcABIVersion = 1;
5418  // If -fobjc-abi-version= is present, use that to set the version.
5419  if (Arg *abiArg = args.getLastArg(options::OPT_fobjc_abi_version_EQ)) {
5420  StringRef value = abiArg->getValue();
5421  if (value == "1")
5422  objcABIVersion = 1;
5423  else if (value == "2")
5424  objcABIVersion = 2;
5425  else if (value == "3")
5426  objcABIVersion = 3;
5427  else
5428  getToolChain().getDriver().Diag(diag::err_drv_clang_unsupported) << value;
5429  } else {
5430  // Otherwise, determine if we are using the non-fragile ABI.
5431  bool nonFragileABIIsDefault =
5432  (rewriteKind == RK_NonFragile ||
5433  (rewriteKind == RK_None &&
5435  if (args.hasFlag(options::OPT_fobjc_nonfragile_abi,
5436  options::OPT_fno_objc_nonfragile_abi,
5437  nonFragileABIIsDefault)) {
5438 // Determine the non-fragile ABI version to use.
5439 #ifdef DISABLE_DEFAULT_NONFRAGILEABI_TWO
5440  unsigned nonFragileABIVersion = 1;
5441 #else
5442  unsigned nonFragileABIVersion = 2;
5443 #endif
5444 
5445  if (Arg *abiArg =
5446  args.getLastArg(options::OPT_fobjc_nonfragile_abi_version_EQ)) {
5447  StringRef value = abiArg->getValue();
5448  if (value == "1")
5449  nonFragileABIVersion = 1;
5450  else if (value == "2")
5451  nonFragileABIVersion = 2;
5452  else
5453  getToolChain().getDriver().Diag(diag::err_drv_clang_unsupported)
5454  << value;
5455  }
5456 
5457  objcABIVersion = 1 + nonFragileABIVersion;
5458  } else {
5459  objcABIVersion = 1;
5460  }
5461  }
5462 
5463  // We don't actually care about the ABI version other than whether
5464  // it's non-fragile.
5465  bool isNonFragile = objcABIVersion != 1;
5466 
5467  // If we have no runtime argument, ask the toolchain for its default runtime.
5468  // However, the rewriter only really supports the Mac runtime, so assume that.
5469  ObjCRuntime runtime;
5470  if (!runtimeArg) {
5471  switch (rewriteKind) {
5472  case RK_None:
5473  runtime = getToolChain().getDefaultObjCRuntime(isNonFragile);
5474  break;
5475  case RK_Fragile:
5476  runtime = ObjCRuntime(ObjCRuntime::FragileMacOSX, VersionTuple());
5477  break;
5478  case RK_NonFragile:
5479  runtime = ObjCRuntime(ObjCRuntime::MacOSX, VersionTuple());
5480  break;
5481  }
5482 
5483  // -fnext-runtime
5484  } else if (runtimeArg->getOption().matches(options::OPT_fnext_runtime)) {
5485  // On Darwin, make this use the default behavior for the toolchain.
5486  if (getToolChain().getTriple().isOSDarwin()) {
5487  runtime = getToolChain().getDefaultObjCRuntime(isNonFragile);
5488 
5489  // Otherwise, build for a generic macosx port.
5490  } else {
5491  runtime = ObjCRuntime(ObjCRuntime::MacOSX, VersionTuple());
5492  }
5493 
5494  // -fgnu-runtime
5495  } else {
5496  assert(runtimeArg->getOption().matches(options::OPT_fgnu_runtime));
5497  // Legacy behaviour is to target the gnustep runtime if we are in
5498  // non-fragile mode or the GCC runtime in fragile mode.
5499  if (isNonFragile)
5500  runtime = ObjCRuntime(ObjCRuntime::GNUstep, VersionTuple(2, 0));
5501  else
5502  runtime = ObjCRuntime(ObjCRuntime::GCC, VersionTuple());
5503  }
5504 
5505  cmdArgs.push_back(
5506  args.MakeArgString("-fobjc-runtime=" + runtime.getAsString()));
5507  return runtime;
5508 }
5509 
5510 static bool maybeConsumeDash(const std::string &EH, size_t &I) {
5511  bool HaveDash = (I + 1 < EH.size() && EH[I + 1] == '-');
5512  I += HaveDash;
5513  return !HaveDash;
5514 }
5515 
5516 namespace {
5517 struct EHFlags {
5518  bool Synch = false;
5519  bool Asynch = false;
5520  bool NoUnwindC = false;
5521 };
5522 } // end anonymous namespace
5523 
5524 /// /EH controls whether to run destructor cleanups when exceptions are
5525 /// thrown. There are three modifiers:
5526 /// - s: Cleanup after "synchronous" exceptions, aka C++ exceptions.
5527 /// - a: Cleanup after "asynchronous" exceptions, aka structured exceptions.
5528 /// The 'a' modifier is unimplemented and fundamentally hard in LLVM IR.
5529 /// - c: Assume that extern "C" functions are implicitly nounwind.
5530 /// The default is /EHs-c-, meaning cleanups are disabled.
5531 static EHFlags parseClangCLEHFlags(const Driver &D, const ArgList &Args) {
5532  EHFlags EH;
5533 
5534  std::vector<std::string> EHArgs =
5535  Args.getAllArgValues(options::OPT__SLASH_EH);
5536  for (auto EHVal : EHArgs) {
5537  for (size_t I = 0, E = EHVal.size(); I != E; ++I) {
5538  switch (EHVal[I]) {
5539  case 'a':
5540  EH.Asynch = maybeConsumeDash(EHVal, I);
5541  if (EH.Asynch)
5542  EH.Synch = false;
5543  continue;
5544  case 'c':
5545  EH.NoUnwindC = maybeConsumeDash(EHVal, I);
5546  continue;
5547  case 's':
5548  EH.Synch = maybeConsumeDash(EHVal, I);
5549  if (EH.Synch)
5550  EH.Asynch = false;
5551  continue;
5552  default:
5553  break;
5554  }
5555  D.Diag(clang::diag::err_drv_invalid_value) << "/EH" << EHVal;
5556  break;
5557  }
5558  }
5559  // The /GX, /GX- flags are only processed if there are not /EH flags.
5560  // The default is that /GX is not specified.
5561  if (EHArgs.empty() &&
5562  Args.hasFlag(options::OPT__SLASH_GX, options::OPT__SLASH_GX_,
5563  /*default=*/false)) {
5564  EH.Synch = true;
5565  EH.NoUnwindC = true;
5566  }
5567 
5568  return EH;
5569 }
5570 
5571 void Clang::AddClangCLArgs(const ArgList &Args, types::ID InputType,
5572  ArgStringList &CmdArgs,
5574  bool *EmitCodeView) const {
5575  unsigned RTOptionID = options::OPT__SLASH_MT;
5576 
5577  if (Args.hasArg(options::OPT__SLASH_LDd))
5578  // The /LDd option implies /MTd. The dependent lib part can be overridden,
5579  // but defining _DEBUG is sticky.
5580  RTOptionID = options::OPT__SLASH_MTd;
5581 
5582  if (Arg *A = Args.getLastArg(options::OPT__SLASH_M_Group))
5583  RTOptionID = A->getOption().getID();
5584 
5585  StringRef FlagForCRT;
5586  switch (RTOptionID) {
5587  case options::OPT__SLASH_MD:
5588  if (Args.hasArg(options::OPT__SLASH_LDd))
5589  CmdArgs.push_back("-D_DEBUG");
5590  CmdArgs.push_back("-D_MT");
5591  CmdArgs.push_back("-D_DLL");
5592  FlagForCRT = "--dependent-lib=msvcrt";
5593  break;
5594  case options::OPT__SLASH_MDd:
5595  CmdArgs.push_back("-D_DEBUG");
5596  CmdArgs.push_back("-D_MT");
5597  CmdArgs.push_back("-D_DLL");
5598  FlagForCRT = "--dependent-lib=msvcrtd";
5599  break;
5600  case options::OPT__SLASH_MT:
5601  if (Args.hasArg(options::OPT__SLASH_LDd))
5602  CmdArgs.push_back("-D_DEBUG");
5603  CmdArgs.push_back("-D_MT");
5604  CmdArgs.push_back("-flto-visibility-public-std");
5605  FlagForCRT = "--dependent-lib=libcmt";
5606  break;
5607  case options::OPT__SLASH_MTd:
5608  CmdArgs.push_back("-D_DEBUG");
5609  CmdArgs.push_back("-D_MT");
5610  CmdArgs.push_back("-flto-visibility-public-std");
5611  FlagForCRT = "--dependent-lib=libcmtd";
5612  break;
5613  default:
5614  llvm_unreachable("Unexpected option ID.");
5615  }
5616 
5617  if (Args.hasArg(options::OPT__SLASH_Zl)) {
5618  CmdArgs.push_back("-D_VC_NODEFAULTLIB");
5619  } else {
5620  CmdArgs.push_back(FlagForCRT.data());
5621 
5622  // This provides POSIX compatibility (maps 'open' to '_open'), which most
5623  // users want. The /Za flag to cl.exe turns this off, but it's not
5624  // implemented in clang.
5625  CmdArgs.push_back("--dependent-lib=oldnames");
5626  }
5627 
5628  if (Arg *A = Args.getLastArg(options::OPT_show_includes))
5629  A->render(Args, CmdArgs);
5630 
5631  // This controls whether or not we emit RTTI data for polymorphic types.
5632  if (Args.hasFlag(options::OPT__SLASH_GR_, options::OPT__SLASH_GR,
5633  /*default=*/false))
5634  CmdArgs.push_back("-fno-rtti-data");
5635 
5636  // This controls whether or not we emit stack-protector instrumentation.
5637  // In MSVC, Buffer Security Check (/GS) is on by default.
5638  if (Args.hasFlag(options::OPT__SLASH_GS, options::OPT__SLASH_GS_,
5639  /*default=*/true)) {
5640  CmdArgs.push_back("-stack-protector");
5641  CmdArgs.push_back(Args.MakeArgString(Twine(LangOptions::SSPStrong)));
5642  }
5643 
5644  // Emit CodeView if -Z7, -Zd, or -gline-tables-only are present.
5645  if (Arg *DebugInfoArg =
5646  Args.getLastArg(options::OPT__SLASH_Z7, options::OPT__SLASH_Zd,
5647  options::OPT_gline_tables_only)) {
5648  *EmitCodeView = true;
5649  if (DebugInfoArg->getOption().matches(options::OPT__SLASH_Z7))
5650  *DebugInfoKind = codegenoptions::LimitedDebugInfo;
5651  else
5652  *DebugInfoKind = codegenoptions::DebugLineTablesOnly;
5653  } else {
5654  *EmitCodeView = false;
5655  }
5656 
5657  const Driver &D = getToolChain().getDriver();
5658  EHFlags EH = parseClangCLEHFlags(D, Args);
5659  if (EH.Synch || EH.Asynch) {
5660  if (types::isCXX(InputType))
5661  CmdArgs.push_back("-fcxx-exceptions");
5662  CmdArgs.push_back("-fexceptions");
5663  }
5664  if (types::isCXX(InputType) && EH.Synch && EH.NoUnwindC)
5665  CmdArgs.push_back("-fexternc-nounwind");
5666 
5667  // /EP should expand to -E -P.
5668  if (Args.hasArg(options::OPT__SLASH_EP)) {
5669  CmdArgs.push_back("-E");
5670  CmdArgs.push_back("-P");
5671  }
5672 
5673  unsigned VolatileOptionID;
5674  if (getToolChain().getArch() == llvm::Triple::x86_64 ||
5675  getToolChain().getArch() == llvm::Triple::x86)
5676  VolatileOptionID = options::OPT__SLASH_volatile_ms;
5677  else
5678  VolatileOptionID = options::OPT__SLASH_volatile_iso;
5679 
5680  if (Arg *A = Args.getLastArg(options::OPT__SLASH_volatile_Group))
5681  VolatileOptionID = A->getOption().getID();
5682 
5683  if (VolatileOptionID == options::OPT__SLASH_volatile_ms)
5684  CmdArgs.push_back("-fms-volatile");
5685 
5686  if (Args.hasFlag(options::OPT__SLASH_Zc_dllexportInlines_,
5687  options::OPT__SLASH_Zc_dllexportInlines,
5688  false)) {
5689  if (Args.hasArg(options::OPT__SLASH_fallback)) {
5690  D.Diag(clang::diag::err_drv_dllexport_inlines_and_fallback);
5691  } else {
5692  CmdArgs.push_back("-fno-dllexport-inlines");
5693  }
5694  }
5695 
5696  Arg *MostGeneralArg = Args.getLastArg(options::OPT__SLASH_vmg);
5697  Arg *BestCaseArg = Args.getLastArg(options::OPT__SLASH_vmb);
5698  if (MostGeneralArg && BestCaseArg)
5699  D.Diag(clang::diag::err_drv_argument_not_allowed_with)
5700  << MostGeneralArg->getAsString(Args) << BestCaseArg->getAsString(Args);
5701 
5702  if (MostGeneralArg) {
5703  Arg *SingleArg = Args.getLastArg(options::OPT__SLASH_vms);
5704  Arg *MultipleArg = Args.getLastArg(options::OPT__SLASH_vmm);
5705  Arg *VirtualArg = Args.getLastArg(options::OPT__SLASH_vmv);
5706 
5707  Arg *FirstConflict = SingleArg ? SingleArg : MultipleArg;
5708  Arg *SecondConflict = VirtualArg ? VirtualArg : MultipleArg;
5709  if (FirstConflict && SecondConflict && FirstConflict != SecondConflict)
5710  D.Diag(clang::diag::err_drv_argument_not_allowed_with)
5711  << FirstConflict->getAsString(Args)
5712  << SecondConflict->getAsString(Args);
5713 
5714  if (SingleArg)
5715  CmdArgs.push_back("-fms-memptr-rep=single");
5716  else if (MultipleArg)
5717  CmdArgs.push_back("-fms-memptr-rep=multiple");
5718  else
5719  CmdArgs.push_back("-fms-memptr-rep=virtual");
5720  }
5721 
5722  // Parse the default calling convention options.
5723  if (Arg *CCArg =
5724  Args.getLastArg(options::OPT__SLASH_Gd, options::OPT__SLASH_Gr,
5725  options::OPT__SLASH_Gz, options::OPT__SLASH_Gv,
5726  options::OPT__SLASH_Gregcall)) {
5727  unsigned DCCOptId = CCArg->getOption().getID();
5728  const char *DCCFlag = nullptr;
5729  bool ArchSupported = true;
5730  llvm::Triple::ArchType Arch = getToolChain().getArch();
5731  switch (DCCOptId) {
5732  case options::OPT__SLASH_Gd:
5733  DCCFlag = "-fdefault-calling-conv=cdecl";
5734  break;
5735  case options::OPT__SLASH_Gr:
5736  ArchSupported = Arch == llvm::Triple::x86;
5737  DCCFlag = "-fdefault-calling-conv=fastcall";
5738  break;
5739  case options::OPT__SLASH_Gz:
5740  ArchSupported = Arch == llvm::Triple::x86;
5741  DCCFlag = "-fdefault-calling-conv=stdcall";
5742  break;
5743  case options::OPT__SLASH_Gv:
5744  ArchSupported = Arch == llvm::Triple::x86 || Arch == llvm::Triple::x86_64;
5745  DCCFlag = "-fdefault-calling-conv=vectorcall";
5746  break;
5747  case options::OPT__SLASH_Gregcall:
5748  ArchSupported = Arch == llvm::Triple::x86 || Arch == llvm::Triple::x86_64;
5749  DCCFlag = "-fdefault-calling-conv=regcall";
5750  break;
5751  }
5752 
5753  // MSVC doesn't warn if /Gr or /Gz is used on x64, so we don't either.
5754  if (ArchSupported && DCCFlag)
5755  CmdArgs.push_back(DCCFlag);
5756  }
5757 
5758  if (Arg *A = Args.getLastArg(options::OPT_vtordisp_mode_EQ))
5759  A->render(Args, CmdArgs);
5760 
5761  if (!Args.hasArg(options::OPT_fdiagnostics_format_EQ)) {
5762  CmdArgs.push_back("-fdiagnostics-format");
5763  if (Args.hasArg(options::OPT__SLASH_fallback))
5764  CmdArgs.push_back("msvc-fallback");
5765  else
5766  CmdArgs.push_back("msvc");
5767  }
5768 
5769  if (Arg *A = Args.getLastArg(options::OPT__SLASH_guard)) {
5770  SmallVector<StringRef, 1> SplitArgs;
5771  StringRef(A->getValue()).split(SplitArgs, ",");
5772  bool Instrument = false;
5773  bool NoChecks = false;
5774  for (StringRef Arg : SplitArgs) {
5775  if (Arg.equals_lower("cf"))
5776  Instrument = true;
5777  else if (Arg.equals_lower("cf-"))
5778  Instrument = false;
5779  else if (Arg.equals_lower("nochecks"))
5780  NoChecks = true;
5781  else if (Arg.equals_lower("nochecks-"))
5782  NoChecks = false;
5783  else
5784  D.Diag(diag::err_drv_invalid_value) << A->getSpelling() << Arg;
5785  }
5786  // Currently there's no support emitting CFG instrumentation; the flag only
5787  // emits the table of address-taken functions.
5788  if (Instrument || NoChecks)
5789  CmdArgs.push_back("-cfguard");
5790  }
5791 }
5792 
5793 visualstudio::Compiler *Clang::getCLFallback() const {
5794  if (!CLFallback)
5795  CLFallback.reset(new visualstudio::Compiler(getToolChain()));
5796  return CLFallback.get();
5797 }
5798 
5799 
5800 const char *Clang::getBaseInputName(const ArgList &Args,
5801  const InputInfo &Input) {
5802  return Args.MakeArgString(llvm::sys::path::filename(Input.getBaseInput()));
5803 }
5804 
5805 const char *Clang::getBaseInputStem(const ArgList &Args,
5806  const InputInfoList &Inputs) {
5807  const char *Str = getBaseInputName(Args, Inputs[0]);
5808 
5809  if (const char *End = strrchr(Str, '.'))
5810  return Args.MakeArgString(std::string(Str, End));
5811 
5812  return Str;
5813 }
5814 
5815 const char *Clang::getDependencyFileName(const ArgList &Args,
5816  const InputInfoList &Inputs) {
5817  // FIXME: Think about this more.
5818  std::string Res;
5819 
5820  if (Arg *OutputOpt = Args.getLastArg(options::OPT_o)) {
5821  std::string Str(OutputOpt->getValue());
5822  Res = Str.substr(0, Str.rfind('.'));
5823  } else {
5824  Res = getBaseInputStem(Args, Inputs);
5825  }
5826  return Args.MakeArgString(Res + ".d");
5827 }
5828 
5829 // Begin ClangAs
5830 
5831 void ClangAs::AddMIPSTargetArgs(const ArgList &Args,
5832  ArgStringList &CmdArgs) const {
5833  StringRef CPUName;
5834  StringRef ABIName;
5835  const llvm::Triple &Triple = getToolChain().getTriple();
5836  mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName);
5837 
5838  CmdArgs.push_back("-target-abi");
5839  CmdArgs.push_back(ABIName.data());
5840 }
5841 
5842 void ClangAs::AddX86TargetArgs(const ArgList &Args,
5843  ArgStringList &CmdArgs) const {
5844  if (Arg *A = Args.getLastArg(options::OPT_masm_EQ)) {
5845  StringRef Value = A->getValue();
5846  if (Value == "intel" || Value == "att") {
5847  CmdArgs.push_back("-mllvm");
5848  CmdArgs.push_back(Args.MakeArgString("-x86-asm-syntax=" + Value));
5849  } else {
5850  getToolChain().getDriver().Diag(diag::err_drv_unsupported_option_argument)
5851  << A->getOption().getName() << Value;
5852  }
5853  }
5854 }
5855 
5857  const InputInfo &Output, const InputInfoList &Inputs,
5858  const ArgList &Args,
5859  const char *LinkingOutput) const {
5860  ArgStringList CmdArgs;
5861 
5862  assert(Inputs.size() == 1 && "Unexpected number of inputs.");
5863  const InputInfo &Input = Inputs[0];
5864 
5865  const llvm::Triple &Triple = getToolChain().getEffectiveTriple();
5866  const std::string &TripleStr = Triple.getTriple();
5867  const auto &D = getToolChain().getDriver();
5868 
5869  // Don't warn about "clang -w -c foo.s"
5870  Args.ClaimAllArgs(options::OPT_w);
5871  // and "clang -emit-llvm -c foo.s"
5872  Args.ClaimAllArgs(options::OPT_emit_llvm);
5873 
5874  claimNoWarnArgs(Args);
5875 
5876  // Invoke ourselves in -cc1as mode.
5877  //
5878  // FIXME: Implement custom jobs for internal actions.
5879  CmdArgs.push_back("-cc1as");
5880 
5881  // Add the "effective" target triple.
5882  CmdArgs.push_back("-triple");
5883  CmdArgs.push_back(Args.MakeArgString(TripleStr));
5884 
5885  // Set the output mode, we currently only expect to be used as a real
5886  // assembler.
5887  CmdArgs.push_back("-filetype");
5888  CmdArgs.push_back("obj");
5889 
5890  // Set the main file name, so that debug info works even with
5891  // -save-temps or preprocessed assembly.
5892  CmdArgs.push_back("-main-file-name");
5893  CmdArgs.push_back(Clang::getBaseInputName(Args, Input));
5894 
5895  // Add the target cpu
5896  std::string CPU = getCPUName(Args, Triple, /*FromAs*/ true);
5897  if (!CPU.empty()) {
5898  CmdArgs.push_back("-target-cpu");
5899  CmdArgs.push_back(Args.MakeArgString(CPU));
5900  }
5901 
5902  // Add the target features
5903  getTargetFeatures(getToolChain(), Triple, Args, CmdArgs, true);
5904 
5905  // Ignore explicit -force_cpusubtype_ALL option.
5906  (void)Args.hasArg(options::OPT_force__cpusubtype__ALL);
5907 
5908  // Pass along any -I options so we get proper .include search paths.
5909  Args.AddAllArgs(CmdArgs, options::OPT_I_Group);
5910 
5911  // Determine the original source input.
5912  const Action *SourceAction = &JA;
5913  while (SourceAction->getKind() != Action::InputClass) {
5914  assert(!SourceAction->getInputs().empty() && "unexpected root action!");
5915  SourceAction = SourceAction->getInputs()[0];
5916  }
5917 
5918  // Forward -g and handle debug info related flags, assuming we are dealing
5919  // with an actual assembly file.
5920  bool WantDebug = false;
5921  unsigned DwarfVersion = 0;
5922  Args.ClaimAllArgs(options::OPT_g_Group);
5923  if (Arg *A = Args.getLastArg(options::OPT_g_Group)) {
5924  WantDebug = !A->getOption().matches(options::OPT_g0) &&
5925  !A->getOption().matches(options::OPT_ggdb0);
5926  if (WantDebug)
5927  DwarfVersion = DwarfVersionNum(A->getSpelling());
5928  }
5929  if (DwarfVersion == 0)
5930  DwarfVersion = getToolChain().GetDefaultDwarfVersion();
5931 
5933 
5934  if (SourceAction->getType() == types::TY_Asm ||
5935  SourceAction->getType() == types::TY_PP_Asm) {
5936  // You might think that it would be ok to set DebugInfoKind outside of
5937  // the guard for source type, however there is a test which asserts
5938  // that some assembler invocation receives no -debug-info-kind,
5939  // and it's not clear whether that test is just overly restrictive.
5940  DebugInfoKind = (WantDebug ? codegenoptions::LimitedDebugInfo
5942  // Add the -fdebug-compilation-dir flag if needed.
5943  addDebugCompDirArg(Args, CmdArgs);
5944 
5945  addDebugPrefixMapArg(getToolChain().getDriver(), Args, CmdArgs);
5946 
5947  // Set the AT_producer to the clang version when using the integrated
5948  // assembler on assembly source files.
5949  CmdArgs.push_back("-dwarf-debug-producer");
5950  CmdArgs.push_back(Args.MakeArgString(getClangFullVersion()));
5951 
5952  // And pass along -I options
5953  Args.AddAllArgs(CmdArgs, options::OPT_I);
5954  }
5955  RenderDebugEnablingArgs(Args, CmdArgs, DebugInfoKind, DwarfVersion,
5956  llvm::DebuggerKind::Default);
5957  RenderDebugInfoCompressionArgs(Args, CmdArgs, D, getToolChain());
5958 
5959 
5960  // Handle -fPIC et al -- the relocation-model affects the assembler
5961  // for some targets.
5962  llvm::Reloc::Model RelocationModel;
5963  unsigned PICLevel;
5964  bool IsPIE;
5965  std::tie(RelocationModel, PICLevel, IsPIE) =
5966  ParsePICArgs(getToolChain(), Args);
5967 
5968  const char *RMName = RelocationModelName(RelocationModel);
5969  if (RMName) {
5970  CmdArgs.push_back("-mrelocation-model");
5971  CmdArgs.push_back(RMName);
5972  }
5973 
5974  // Optionally embed the -cc1as level arguments into the debug info, for build
5975  // analysis.
5976  if (getToolChain().UseDwarfDebugFlags()) {
5977  ArgStringList OriginalArgs;
5978  for (const auto &Arg : Args)
5979  Arg->render(Args, OriginalArgs);
5980 
5981  SmallString<256> Flags;
5982  const char *Exec = getToolChain().getDriver().getClangProgramPath();
5983  Flags += Exec;
5984  for (const char *OriginalArg : OriginalArgs) {
5985  SmallString<128> EscapedArg;
5986  EscapeSpacesAndBackslashes(OriginalArg, EscapedArg);
5987  Flags += " ";
5988  Flags += EscapedArg;
5989  }
5990  CmdArgs.push_back("-dwarf-debug-flags");
5991  CmdArgs.push_back(Args.MakeArgString(Flags));
5992  }
5993 
5994  // FIXME: Add -static support, once we have it.
5995 
5996  // Add target specific flags.
5997  switch (getToolChain().getArch()) {
5998  default:
5999  break;
6000 
6001  case llvm::Triple::mips:
6002  case llvm::Triple::mipsel:
6003  case llvm::Triple::mips64:
6004  case llvm::Triple::mips64el:
6005  AddMIPSTargetArgs(Args, CmdArgs);
6006  break;
6007 
6008  case llvm::Triple::x86:
6009  case llvm::Triple::x86_64:
6010  AddX86TargetArgs(Args, CmdArgs);
6011  break;
6012 
6013  case llvm::Triple::arm:
6014  case llvm::Triple::armeb:
6015  case llvm::Triple::thumb:
6016  case llvm::Triple::thumbeb:
6017  // This isn't in AddARMTargetArgs because we want to do this for assembly
6018  // only, not C/C++.
6019  if (Args.hasFlag(options::OPT_mdefault_build_attributes,
6020  options::OPT_mno_default_build_attributes, true)) {
6021  CmdArgs.push_back("-mllvm");
6022  CmdArgs.push_back("-arm-add-build-attributes");
6023  }
6024  break;
6025  }
6026 
6027  // Consume all the warning flags. Usually this would be handled more
6028  // gracefully by -cc1 (warning about unknown warning flags, etc) but -cc1as
6029  // doesn't handle that so rather than warning about unused flags that are
6030  // actually used, we'll lie by omission instead.
6031  // FIXME: Stop lying and consume only the appropriate driver flags
6032  Args.ClaimAllArgs(options::OPT_W_Group);
6033 
6034  CollectArgsForIntegratedAssembler(C, Args, CmdArgs,
6035  getToolChain().getDriver());
6036 
6037  Args.AddAllArgs(CmdArgs, options::OPT_mllvm);
6038 
6039  assert(Output.isFilename() && "Unexpected lipo output.");
6040  CmdArgs.push_back("-o");
6041  CmdArgs.push_back(Output.getFilename());
6042 
6043  const llvm::Triple &T = getToolChain().getTriple();
6044  Arg *A;
6045  if ((getDebugFissionKind(D, Args, A) == DwarfFissionKind::Split) &&
6046  (T.isOSLinux() || T.isOSFuchsia())) {
6047  CmdArgs.push_back("-split-dwarf-file");
6048  CmdArgs.push_back(SplitDebugName(Args, Output));
6049  }
6050 
6051  assert(Input.isFilename() && "Invalid input.");
6052  CmdArgs.push_back(Input.getFilename());
6053 
6054  const char *Exec = getToolChain().getDriver().getClangProgramPath();
6055  C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
6056 }
6057 
6058 // Begin OffloadBundler
6059 
6061  const InputInfo &Output,
6062  const InputInfoList &Inputs,
6063  const llvm::opt::ArgList &TCArgs,
6064  const char *LinkingOutput) const {
6065  // The version with only one output is expected to refer to a bundling job.
6066  assert(isa<OffloadBundlingJobAction>(JA) && "Expecting bundling job!");
6067 
6068  // The bundling command looks like this:
6069  // clang-offload-bundler -type=bc
6070  // -targets=host-triple,openmp-triple1,openmp-triple2
6071  // -outputs=input_file
6072  // -inputs=unbundle_file_host,unbundle_file_tgt1,unbundle_file_tgt2"
6073 
6074  ArgStringList CmdArgs;
6075 
6076  // Get the type.
6077  CmdArgs.push_back(TCArgs.MakeArgString(
6078  Twine("-type=") + types::getTypeTempSuffix(Output.getType())));
6079 
6080  assert(JA.getInputs().size() == Inputs.size() &&
6081  "Not have inputs for all dependence actions??");
6082 
6083  // Get the targets.
6084  SmallString<128> Triples;
6085  Triples += "-targets=";
6086  for (unsigned I = 0; I < Inputs.size(); ++I) {
6087  if (I)
6088  Triples += ',';
6089 
6090  // Find ToolChain for this input.
6092  const ToolChain *CurTC = &getToolChain();
6093  const Action *CurDep = JA.getInputs()[I];
6094 
6095  if (const auto *OA = dyn_cast<OffloadAction>(CurDep)) {
6096  CurTC = nullptr;
6097  OA->doOnEachDependence([&](Action *A, const ToolChain *TC, const char *) {
6098  assert(CurTC == nullptr && "Expected one dependence!");
6099  CurKind = A->getOffloadingDeviceKind();
6100  CurTC = TC;
6101  });
6102  }
6103  Triples += Action::GetOffloadKindName(CurKind);
6104  Triples += '-';
6105  Triples += CurTC->getTriple().normalize();
6106  if (CurKind == Action::OFK_HIP && CurDep->getOffloadingArch()) {
6107  Triples += '-';
6108  Triples += CurDep->getOffloadingArch();
6109  }
6110  }
6111  CmdArgs.push_back(TCArgs.MakeArgString(Triples));
6112 
6113  // Get bundled file command.
6114  CmdArgs.push_back(
6115  TCArgs.MakeArgString(Twine("-outputs=") + Output.getFilename()));
6116 
6117  // Get unbundled files command.
6118  SmallString<128> UB;
6119  UB += "-inputs=";
6120  for (unsigned I = 0; I < Inputs.size(); ++I) {
6121  if (I)
6122  UB += ',';
6123 
6124  // Find ToolChain for this input.
6125  const ToolChain *CurTC = &getToolChain();
6126  if (const auto *OA = dyn_cast<OffloadAction>(JA.getInputs()[I])) {
6127  CurTC = nullptr;
6128  OA->doOnEachDependence([&](Action *, const ToolChain *TC, const char *) {
6129  assert(CurTC == nullptr && "Expected one dependence!");
6130  CurTC = TC;
6131  });
6132  }
6133  UB += CurTC->getInputFilename(Inputs[I]);
6134  }
6135  CmdArgs.push_back(TCArgs.MakeArgString(UB));
6136 
6137  // All the inputs are encoded as commands.
6138  C.addCommand(llvm::make_unique<Command>(
6139  JA, *this,
6140  TCArgs.MakeArgString(getToolChain().GetProgramPath(getShortName())),
6141  CmdArgs, None));
6142 }
6143 
6145  Compilation &C, const JobAction &JA, const InputInfoList &Outputs,
6146  const InputInfoList &Inputs, const llvm::opt::ArgList &TCArgs,
6147  const char *LinkingOutput) const {
6148  // The version with multiple outputs is expected to refer to a unbundling job.
6149  auto &UA = cast<OffloadUnbundlingJobAction>(JA);
6150 
6151  // The unbundling command looks like this:
6152  // clang-offload-bundler -type=bc
6153  // -targets=host-triple,openmp-triple1,openmp-triple2
6154  // -inputs=input_file
6155  // -outputs=unbundle_file_host,unbundle_file_tgt1,unbundle_file_tgt2"
6156  // -unbundle
6157 
6158  ArgStringList CmdArgs;
6159 
6160  assert(Inputs.size() == 1 && "Expecting to unbundle a single file!");
6161  InputInfo Input = Inputs.front();
6162 
6163  // Get the type.
6164  CmdArgs.push_back(TCArgs.MakeArgString(
6165  Twine("-type=") + types::getTypeTempSuffix(Input.getType())));
6166 
6167  // Get the targets.
6168  SmallString<128> Triples;
6169  Triples += "-targets=";
6170  auto DepInfo = UA.getDependentActionsInfo();
6171  for (unsigned I = 0; I < DepInfo.size(); ++I) {
6172  if (I)
6173  Triples += ',';
6174 
6175  auto &Dep = DepInfo[I];
6176  Triples += Action::GetOffloadKindName(Dep.DependentOffloadKind);
6177  Triples += '-';
6178  Triples += Dep.DependentToolChain->getTriple().normalize();
6179  if (Dep.DependentOffloadKind == Action::OFK_HIP &&
6180  !Dep.DependentBoundArch.empty()) {
6181  Triples += '-';
6182  Triples += Dep.DependentBoundArch;
6183  }
6184  }
6185 
6186  CmdArgs.push_back(TCArgs.MakeArgString(Triples));
6187 
6188  // Get bundled file command.
6189  CmdArgs.push_back(
6190  TCArgs.MakeArgString(Twine("-inputs=") + Input.getFilename()));
6191 
6192  // Get unbundled files command.
6193  SmallString<128> UB;
6194  UB += "-outputs=";
6195  for (unsigned I = 0; I < Outputs.size(); ++I) {
6196  if (I)
6197  UB += ',';
6198  UB += DepInfo[I].DependentToolChain->getInputFilename(Outputs[I]);
6199  }
6200  CmdArgs.push_back(TCArgs.MakeArgString(UB));
6201  CmdArgs.push_back("-unbundle");
6202 
6203  // All the inputs are encoded as commands.
6204  C.addCommand(llvm::make_unique<Command>(
6205  JA, *this,
6206  TCArgs.MakeArgString(getToolChain().GetProgramPath(getShortName())),
6207  CmdArgs, None));
6208 }
StringRef getSysRoot() const
Returns the sysroot path.
static void RenderCharacterOptions(const ArgList &Args, const llvm::Triple &T, ArgStringList &CmdArgs)
Definition: Clang.cpp:2832
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:5800
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:310
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:6144
static bool useFramePointerForTargetByDefault(const ArgList &Args, const llvm::Triple &Triple)
Definition: Clang.cpp:517
OpenMPRuntimeKind getOpenMPRuntime(const llvm::opt::ArgList &Args) const
Compute the desired OpenMP runtime from the flags provided.
Definition: Driver.cpp:550
static bool ShouldDisableAutolink(const ArgList &Args, const ToolChain &TC)
Definition: Clang.cpp:470
std::string getClangFullVersion()
Retrieves a string representing the complete clang version, which includes the clang version number...
Definition: Version.cpp:118
virtual ObjCRuntime getDefaultObjCRuntime(bool isNonFragile) const
getDefaultObjCRuntime - Return the default Objective-C runtime for this platform. ...
Definition: ToolChain.cpp:495
const char * SplitDebugName(const llvm::opt::ArgList &Args, const InputInfo &Output)
unsigned CCPrintHeaders
Set CC_PRINT_HEADERS mode, which causes the frontend to log header include information to CCPrintHead...
Definition: Driver.h:193
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:55
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:415
bool isUseSeparateSections(const llvm::Triple &Triple)
Definition: CommonArgs.cpp:353
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:520
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:741
input_range inputs()
Definition: Action.h:150
bool embedBitcodeEnabled() const
Definition: Driver.h:328
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:615
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...
Definition: Clang.cpp:124
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:202
static void CollectArgsForIntegratedAssembler(Compilation &C, const ArgList &Args, ArgStringList &CmdArgs, const Driver &D)
Definition: Clang.cpp:1989
LTOKind getLTOMode() const
Get the specific kind of LTO being performed.
Definition: Driver.h:523
DiagnosticBuilder Diag(unsigned DiagID) const
Definition: Driver.h:109
static void QuoteTarget(StringRef Target, SmallVectorImpl< char > &Res)
Definition: Clang.cpp:95
static void CheckPreprocessingOptions(const Driver &D, const ArgList &Args)
Definition: Clang.cpp:54
&#39;gcc&#39; is the Objective-C runtime shipped with GCC, implementing a fragile Objective-C ABI ...
Definition: ObjCRuntime.h:53
static bool shouldUseFramePointer(const ArgList &Args, const llvm::Triple &Triple)
Definition: Clang.cpp:577
static bool UseRelaxAll(Compilation &C, const ArgList &Args)
Check if -relax-all should be passed to the internal assembler.
Definition: Clang.cpp:885
FloatABI getARMFloatABI(const ToolChain &TC, const llvm::opt::ArgList &Args)
static StringRef bytes(const std::vector< T, Allocator > &v)
Definition: ASTWriter.cpp:120
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:40
const char * getFilename() const
Definition: InputInfo.h:84
virtual void AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const
Add the clang cc1 arguments for system include paths.
Definition: ToolChain.cpp:646
Distro - Helper class for detecting and classifying Linux distributions.
Definition: Distro.h:23
bool embedBitcodeMarkerOnly() const
Definition: Driver.h:330
ActionList & getInputs()
Definition: Action.h:143
unsigned CCLogDiagnostics
Set CC_LOG_DIAGNOSTICS mode, which causes the frontend to log diagnostics to CCLogDiagnosticsFilename...
Definition: Driver.h:198
virtual unsigned GetDefaultStackProtectorLevel(bool KernelOrKext) const
GetDefaultStackProtectorLevel - Get the default stack protector level for this tool chain (0=off...
Definition: ToolChain.h:349
static void RenderFloatingPointOptions(const ToolChain &TC, const Driver &D, bool OFastEnabled, const ArgList &Args, ArgStringList &CmdArgs)
Definition: Clang.cpp:2189
bool isOffloading(OffloadKind OKind) const
Definition: Action.h:208
std::string GetClPchPath(Compilation &C, StringRef BaseName) const
Return the pathname of the pch file in clang-cl mode.
Definition: Driver.cpp:4493
Action - Represent an abstract compilation step to perform.
Definition: Action.h:48
static const char * RelocationModelName(llvm::Reloc::Model Model)
Definition: Clang.cpp:998
bool isNonFragile() const
Does this runtime follow the set of implied behaviors for a "non-fragile" ABI?
Definition: ObjCRuntime.h:82
bool isNeXTFamily() const
Is this runtime basically of the NeXT family of runtimes?
Definition: ObjCRuntime.h:135
std::string getTripleString() const
Definition: ToolChain.h:211
static void addPGOAndCoverageFlags(Compilation &C, const Driver &D, const InputInfo &Output, const ArgList &Args, ArgStringList &CmdArgs)
Definition: Clang.cpp:721
Emit location information but do not generate debug info in the output.
InputInfo - Wrapper for information about an input source.
Definition: InputInfo.h:23
static void addDashXForInput(const ArgList &Args, const InputInfo &Input, ArgStringList &CmdArgs)
Add -x lang to CmdArgs for Input.
Definition: Clang.cpp:659
types::ID getType() const
Definition: Action.h:141
bool isDeviceOffloading(OffloadKind OKind) const
Definition: Action.h:205
bool isOptimizationLevelFast(const llvm::opt::ArgList &Args)
The LLVM OpenMP runtime.
Definition: Driver.h:95
Scope - A scope is a transient data structure that is used while parsing the program.
Definition: Scope.h:41
OffloadKind getOffloadingDeviceKind() const
Definition: Action.h:197
static void RenderSSPOptions(const ToolChain &TC, const ArgList &Args, ArgStringList &CmdArgs, bool KernelOrKext)
Definition: Clang.cpp:2436
FloatABI getPPCFloatABI(const Driver &D, const llvm::opt::ArgList &Args)