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1 //===--- CompilerInvocation.cpp -------------------------------------------===//
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 "TestModuleFileExtension.h"
11 #include "clang/Basic/Builtins.h"
12 #include "clang/Basic/FileManager.h"
13 #include "clang/Basic/Version.h"
14 #include "clang/Config/config.h"
15 #include "clang/Driver/DriverDiagnostic.h"
16 #include "clang/Driver/Options.h"
17 #include "clang/Driver/Util.h"
18 #include "clang/Frontend/CompilerInvocation.h"
19 #include "clang/Frontend/FrontendDiagnostic.h"
20 #include "clang/Frontend/LangStandard.h"
21 #include "clang/Frontend/Utils.h"
22 #include "clang/Lex/HeaderSearchOptions.h"
23 #include "clang/Serialization/ASTReader.h"
24 #include "clang/Serialization/ModuleFileExtension.h"
25 #include "llvm/ADT/Hashing.h"
26 #include "llvm/ADT/STLExtras.h"
27 #include "llvm/ADT/SmallVector.h"
28 #include "llvm/ADT/StringExtras.h"
29 #include "llvm/ADT/StringSwitch.h"
30 #include "llvm/ADT/Triple.h"
31 #include "llvm/Linker/Linker.h"
32 #include "llvm/Option/Arg.h"
33 #include "llvm/Option/ArgList.h"
34 #include "llvm/Option/OptTable.h"
35 #include "llvm/Option/Option.h"
36 #include "llvm/ProfileData/InstrProfReader.h"
37 #include "llvm/Support/CodeGen.h"
38 #include "llvm/Support/ErrorHandling.h"
39 #include "llvm/Support/FileSystem.h"
40 #include "llvm/Support/Host.h"
41 #include "llvm/Support/Path.h"
42 #include "llvm/Support/Process.h"
43 #include "llvm/Target/TargetOptions.h"
44 #include "llvm/Support/ScopedPrinter.h"
45 #include <atomic>
46 #include <memory>
47 #include <sys/stat.h>
48 #include <system_error>
49 using namespace clang;
50 
51 //===----------------------------------------------------------------------===//
52 // Initialization.
53 //===----------------------------------------------------------------------===//
54 
CompilerInvocationBase()55 CompilerInvocationBase::CompilerInvocationBase()
56   : LangOpts(new LangOptions()), TargetOpts(new TargetOptions()),
57     DiagnosticOpts(new DiagnosticOptions()),
58     HeaderSearchOpts(new HeaderSearchOptions()),
59     PreprocessorOpts(new PreprocessorOptions()) {}
60 
CompilerInvocationBase(const CompilerInvocationBase & X)61 CompilerInvocationBase::CompilerInvocationBase(const CompilerInvocationBase &X)
62   : RefCountedBase<CompilerInvocation>(),
63     LangOpts(new LangOptions(*X.getLangOpts())),
64     TargetOpts(new TargetOptions(X.getTargetOpts())),
65     DiagnosticOpts(new DiagnosticOptions(X.getDiagnosticOpts())),
66     HeaderSearchOpts(new HeaderSearchOptions(X.getHeaderSearchOpts())),
67     PreprocessorOpts(new PreprocessorOptions(X.getPreprocessorOpts())) {}
68 
~CompilerInvocationBase()69 CompilerInvocationBase::~CompilerInvocationBase() {}
70 
71 //===----------------------------------------------------------------------===//
72 // Deserialization (from args)
73 //===----------------------------------------------------------------------===//
74 
75 using namespace clang::driver;
76 using namespace clang::driver::options;
77 using namespace llvm::opt;
78 
79 //
80 
getOptimizationLevel(ArgList & Args,InputKind IK,DiagnosticsEngine & Diags)81 static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
82                                      DiagnosticsEngine &Diags) {
83   unsigned DefaultOpt = 0;
84   if (IK == IK_OpenCL && !Args.hasArg(OPT_cl_opt_disable))
85     DefaultOpt = 2;
86 
87   if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
88     if (A->getOption().matches(options::OPT_O0))
89       return 0;
90 
91     if (A->getOption().matches(options::OPT_Ofast))
92       return 3;
93 
94     assert (A->getOption().matches(options::OPT_O));
95 
96     StringRef S(A->getValue());
97     if (S == "s" || S == "z" || S.empty())
98       return 2;
99 
100     return getLastArgIntValue(Args, OPT_O, DefaultOpt, Diags);
101   }
102 
103   return DefaultOpt;
104 }
105 
getOptimizationLevelSize(ArgList & Args)106 static unsigned getOptimizationLevelSize(ArgList &Args) {
107   if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
108     if (A->getOption().matches(options::OPT_O)) {
109       switch (A->getValue()[0]) {
110       default:
111         return 0;
112       case 's':
113         return 1;
114       case 'z':
115         return 2;
116       }
117     }
118   }
119   return 0;
120 }
121 
addDiagnosticArgs(ArgList & Args,OptSpecifier Group,OptSpecifier GroupWithValue,std::vector<std::string> & Diagnostics)122 static void addDiagnosticArgs(ArgList &Args, OptSpecifier Group,
123                               OptSpecifier GroupWithValue,
124                               std::vector<std::string> &Diagnostics) {
125   for (Arg *A : Args.filtered(Group)) {
126     if (A->getOption().getKind() == Option::FlagClass) {
127       // The argument is a pure flag (such as OPT_Wall or OPT_Wdeprecated). Add
128       // its name (minus the "W" or "R" at the beginning) to the warning list.
129       Diagnostics.push_back(A->getOption().getName().drop_front(1));
130     } else if (A->getOption().matches(GroupWithValue)) {
131       // This is -Wfoo= or -Rfoo=, where foo is the name of the diagnostic group.
132       Diagnostics.push_back(A->getOption().getName().drop_front(1).rtrim("=-"));
133     } else {
134       // Otherwise, add its value (for OPT_W_Joined and similar).
135       for (const char *Arg : A->getValues())
136         Diagnostics.emplace_back(Arg);
137     }
138   }
139 }
140 
getAllNoBuiltinFuncValues(ArgList & Args,std::vector<std::string> & Funcs)141 static void getAllNoBuiltinFuncValues(ArgList &Args,
142                                       std::vector<std::string> &Funcs) {
143   SmallVector<const char *, 8> Values;
144   for (const auto &Arg : Args) {
145     const Option &O = Arg->getOption();
146     if (O.matches(options::OPT_fno_builtin_)) {
147       const char *FuncName = Arg->getValue();
148       if (Builtin::Context::isBuiltinFunc(FuncName))
149         Values.push_back(FuncName);
150     }
151   }
152   Funcs.insert(Funcs.end(), Values.begin(), Values.end());
153 }
154 
ParseAnalyzerArgs(AnalyzerOptions & Opts,ArgList & Args,DiagnosticsEngine & Diags)155 static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
156                               DiagnosticsEngine &Diags) {
157   using namespace options;
158   bool Success = true;
159   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
160     StringRef Name = A->getValue();
161     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
162 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
163       .Case(CMDFLAG, NAME##Model)
164 #include "clang/StaticAnalyzer/Core/Analyses.def"
165       .Default(NumStores);
166     if (Value == NumStores) {
167       Diags.Report(diag::err_drv_invalid_value)
168         << A->getAsString(Args) << Name;
169       Success = false;
170     } else {
171       Opts.AnalysisStoreOpt = Value;
172     }
173   }
174 
175   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
176     StringRef Name = A->getValue();
177     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
178 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
179       .Case(CMDFLAG, NAME##Model)
180 #include "clang/StaticAnalyzer/Core/Analyses.def"
181       .Default(NumConstraints);
182     if (Value == NumConstraints) {
183       Diags.Report(diag::err_drv_invalid_value)
184         << A->getAsString(Args) << Name;
185       Success = false;
186     } else {
187       Opts.AnalysisConstraintsOpt = Value;
188     }
189   }
190 
191   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
192     StringRef Name = A->getValue();
193     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
194 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN) \
195       .Case(CMDFLAG, PD_##NAME)
196 #include "clang/StaticAnalyzer/Core/Analyses.def"
197       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
198     if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
199       Diags.Report(diag::err_drv_invalid_value)
200         << A->getAsString(Args) << Name;
201       Success = false;
202     } else {
203       Opts.AnalysisDiagOpt = Value;
204     }
205   }
206 
207   if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
208     StringRef Name = A->getValue();
209     AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
210 #define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
211       .Case(CMDFLAG, NAME)
212 #include "clang/StaticAnalyzer/Core/Analyses.def"
213       .Default(NumPurgeModes);
214     if (Value == NumPurgeModes) {
215       Diags.Report(diag::err_drv_invalid_value)
216         << A->getAsString(Args) << Name;
217       Success = false;
218     } else {
219       Opts.AnalysisPurgeOpt = Value;
220     }
221   }
222 
223   if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
224     StringRef Name = A->getValue();
225     AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
226 #define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
227       .Case(CMDFLAG, NAME)
228 #include "clang/StaticAnalyzer/Core/Analyses.def"
229       .Default(NumInliningModes);
230     if (Value == NumInliningModes) {
231       Diags.Report(diag::err_drv_invalid_value)
232         << A->getAsString(Args) << Name;
233       Success = false;
234     } else {
235       Opts.InliningMode = Value;
236     }
237   }
238 
239   Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
240   Opts.DisableAllChecks = Args.hasArg(OPT_analyzer_disable_all_checks);
241 
242   Opts.visualizeExplodedGraphWithGraphViz =
243     Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
244   Opts.visualizeExplodedGraphWithUbiGraph =
245     Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
246   Opts.NoRetryExhausted = Args.hasArg(OPT_analyzer_disable_retry_exhausted);
247   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
248   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
249   Opts.AnalyzeNestedBlocks =
250     Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
251   Opts.eagerlyAssumeBinOpBifurcation = Args.hasArg(OPT_analyzer_eagerly_assume);
252   Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
253   Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
254   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
255   Opts.maxBlockVisitOnPath =
256       getLastArgIntValue(Args, OPT_analyzer_max_loop, 4, Diags);
257   Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
258   Opts.InlineMaxStackDepth =
259       getLastArgIntValue(Args, OPT_analyzer_inline_max_stack_depth,
260                          Opts.InlineMaxStackDepth, Diags);
261 
262   Opts.CheckersControlList.clear();
263   for (const Arg *A :
264        Args.filtered(OPT_analyzer_checker, OPT_analyzer_disable_checker)) {
265     A->claim();
266     bool enable = (A->getOption().getID() == OPT_analyzer_checker);
267     // We can have a list of comma separated checker names, e.g:
268     // '-analyzer-checker=cocoa,unix'
269     StringRef checkerList = A->getValue();
270     SmallVector<StringRef, 4> checkers;
271     checkerList.split(checkers, ",");
272     for (StringRef checker : checkers)
273       Opts.CheckersControlList.emplace_back(checker, enable);
274   }
275 
276   // Go through the analyzer configuration options.
277   for (const Arg *A : Args.filtered(OPT_analyzer_config)) {
278     A->claim();
279     // We can have a list of comma separated config names, e.g:
280     // '-analyzer-config key1=val1,key2=val2'
281     StringRef configList = A->getValue();
282     SmallVector<StringRef, 4> configVals;
283     configList.split(configVals, ",");
284     for (unsigned i = 0, e = configVals.size(); i != e; ++i) {
285       StringRef key, val;
286       std::tie(key, val) = configVals[i].split("=");
287       if (val.empty()) {
288         Diags.Report(SourceLocation(),
289                      diag::err_analyzer_config_no_value) << configVals[i];
290         Success = false;
291         break;
292       }
293       if (val.find('=') != StringRef::npos) {
294         Diags.Report(SourceLocation(),
295                      diag::err_analyzer_config_multiple_values)
296           << configVals[i];
297         Success = false;
298         break;
299       }
300       Opts.Config[key] = val;
301     }
302   }
303 
304   return Success;
305 }
306 
ParseMigratorArgs(MigratorOptions & Opts,ArgList & Args)307 static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
308   Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
309   Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
310   return true;
311 }
312 
ParseCommentArgs(CommentOptions & Opts,ArgList & Args)313 static void ParseCommentArgs(CommentOptions &Opts, ArgList &Args) {
314   Opts.BlockCommandNames = Args.getAllArgValues(OPT_fcomment_block_commands);
315   Opts.ParseAllComments = Args.hasArg(OPT_fparse_all_comments);
316 }
317 
getCodeModel(ArgList & Args,DiagnosticsEngine & Diags)318 static StringRef getCodeModel(ArgList &Args, DiagnosticsEngine &Diags) {
319   if (Arg *A = Args.getLastArg(OPT_mcode_model)) {
320     StringRef Value = A->getValue();
321     if (Value == "small" || Value == "kernel" || Value == "medium" ||
322         Value == "large")
323       return Value;
324     Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Value;
325   }
326   return "default";
327 }
328 
329 /// \brief Create a new Regex instance out of the string value in \p RpassArg.
330 /// It returns a pointer to the newly generated Regex instance.
331 static std::shared_ptr<llvm::Regex>
GenerateOptimizationRemarkRegex(DiagnosticsEngine & Diags,ArgList & Args,Arg * RpassArg)332 GenerateOptimizationRemarkRegex(DiagnosticsEngine &Diags, ArgList &Args,
333                                 Arg *RpassArg) {
334   StringRef Val = RpassArg->getValue();
335   std::string RegexError;
336   std::shared_ptr<llvm::Regex> Pattern = std::make_shared<llvm::Regex>(Val);
337   if (!Pattern->isValid(RegexError)) {
338     Diags.Report(diag::err_drv_optimization_remark_pattern)
339         << RegexError << RpassArg->getAsString(Args);
340     Pattern.reset();
341   }
342   return Pattern;
343 }
344 
parseDiagnosticLevelMask(StringRef FlagName,const std::vector<std::string> & Levels,DiagnosticsEngine * Diags,DiagnosticLevelMask & M)345 static bool parseDiagnosticLevelMask(StringRef FlagName,
346                                      const std::vector<std::string> &Levels,
347                                      DiagnosticsEngine *Diags,
348                                      DiagnosticLevelMask &M) {
349   bool Success = true;
350   for (const auto &Level : Levels) {
351     DiagnosticLevelMask const PM =
352       llvm::StringSwitch<DiagnosticLevelMask>(Level)
353         .Case("note",    DiagnosticLevelMask::Note)
354         .Case("remark",  DiagnosticLevelMask::Remark)
355         .Case("warning", DiagnosticLevelMask::Warning)
356         .Case("error",   DiagnosticLevelMask::Error)
357         .Default(DiagnosticLevelMask::None);
358     if (PM == DiagnosticLevelMask::None) {
359       Success = false;
360       if (Diags)
361         Diags->Report(diag::err_drv_invalid_value) << FlagName << Level;
362     }
363     M = M | PM;
364   }
365   return Success;
366 }
367 
parseSanitizerKinds(StringRef FlagName,const std::vector<std::string> & Sanitizers,DiagnosticsEngine & Diags,SanitizerSet & S)368 static void parseSanitizerKinds(StringRef FlagName,
369                                 const std::vector<std::string> &Sanitizers,
370                                 DiagnosticsEngine &Diags, SanitizerSet &S) {
371   for (const auto &Sanitizer : Sanitizers) {
372     SanitizerMask K = parseSanitizerValue(Sanitizer, /*AllowGroups=*/false);
373     if (K == 0)
374       Diags.Report(diag::err_drv_invalid_value) << FlagName << Sanitizer;
375     else
376       S.set(K, true);
377   }
378 }
379 
380 // Set the profile kind for fprofile-instrument.
setPGOInstrumentor(CodeGenOptions & Opts,ArgList & Args,DiagnosticsEngine & Diags)381 static void setPGOInstrumentor(CodeGenOptions &Opts, ArgList &Args,
382                                DiagnosticsEngine &Diags) {
383   Arg *A = Args.getLastArg(OPT_fprofile_instrument_EQ);
384   if (A == nullptr)
385     return;
386   StringRef S = A->getValue();
387   unsigned I = llvm::StringSwitch<unsigned>(S)
388                    .Case("none", CodeGenOptions::ProfileNone)
389                    .Case("clang", CodeGenOptions::ProfileClangInstr)
390                    .Case("llvm", CodeGenOptions::ProfileIRInstr)
391                    .Default(~0U);
392   if (I == ~0U) {
393     Diags.Report(diag::err_drv_invalid_pgo_instrumentor) << A->getAsString(Args)
394                                                          << S;
395     return;
396   }
397   CodeGenOptions::ProfileInstrKind Instrumentor =
398       static_cast<CodeGenOptions::ProfileInstrKind>(I);
399   Opts.setProfileInstr(Instrumentor);
400 }
401 
402 // Set the profile kind using fprofile-instrument-use-path.
setPGOUseInstrumentor(CodeGenOptions & Opts,const Twine & ProfileName)403 static void setPGOUseInstrumentor(CodeGenOptions &Opts,
404                                   const Twine &ProfileName) {
405   auto ReaderOrErr = llvm::IndexedInstrProfReader::create(ProfileName);
406   // In error, return silently and let Clang PGOUse report the error message.
407   if (auto E = ReaderOrErr.takeError()) {
408     llvm::consumeError(std::move(E));
409     Opts.setProfileUse(CodeGenOptions::ProfileClangInstr);
410     return;
411   }
412   std::unique_ptr<llvm::IndexedInstrProfReader> PGOReader =
413     std::move(ReaderOrErr.get());
414   if (PGOReader->isIRLevelProfile())
415     Opts.setProfileUse(CodeGenOptions::ProfileIRInstr);
416   else
417     Opts.setProfileUse(CodeGenOptions::ProfileClangInstr);
418 }
419 
ParseCodeGenArgs(CodeGenOptions & Opts,ArgList & Args,InputKind IK,DiagnosticsEngine & Diags,const TargetOptions & TargetOpts)420 static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
421                              DiagnosticsEngine &Diags,
422                              const TargetOptions &TargetOpts) {
423   using namespace options;
424   bool Success = true;
425   llvm::Triple Triple = llvm::Triple(TargetOpts.Triple);
426 
427   unsigned OptimizationLevel = getOptimizationLevel(Args, IK, Diags);
428   // TODO: This could be done in Driver
429   unsigned MaxOptLevel = 3;
430   if (OptimizationLevel > MaxOptLevel) {
431     // If the optimization level is not supported, fall back on the default
432     // optimization
433     Diags.Report(diag::warn_drv_optimization_value)
434         << Args.getLastArg(OPT_O)->getAsString(Args) << "-O" << MaxOptLevel;
435     OptimizationLevel = MaxOptLevel;
436   }
437   Opts.OptimizationLevel = OptimizationLevel;
438 
439   // We must always run at least the always inlining pass.
440   Opts.setInlining(
441     (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
442                                  : CodeGenOptions::OnlyAlwaysInlining);
443   // -fno-inline-functions overrides OptimizationLevel > 1.
444   Opts.NoInline = Args.hasArg(OPT_fno_inline);
445   if (Arg* InlineArg = Args.getLastArg(options::OPT_finline_functions,
446                                        options::OPT_finline_hint_functions,
447                                        options::OPT_fno_inline_functions)) {
448     const Option& InlineOpt = InlineArg->getOption();
449     if (InlineOpt.matches(options::OPT_finline_functions))
450       Opts.setInlining(CodeGenOptions::NormalInlining);
451     else if (InlineOpt.matches(options::OPT_finline_hint_functions))
452       Opts.setInlining(CodeGenOptions::OnlyHintInlining);
453     else
454       Opts.setInlining(CodeGenOptions::OnlyAlwaysInlining);
455   }
456 
457   if (Arg *A = Args.getLastArg(OPT_fveclib)) {
458     StringRef Name = A->getValue();
459     if (Name == "Accelerate")
460       Opts.setVecLib(CodeGenOptions::Accelerate);
461     else if (Name == "none")
462       Opts.setVecLib(CodeGenOptions::NoLibrary);
463     else
464       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
465   }
466 
467   if (Arg *A = Args.getLastArg(OPT_debug_info_kind_EQ)) {
468     unsigned Val =
469         llvm::StringSwitch<unsigned>(A->getValue())
470             .Case("line-tables-only", codegenoptions::DebugLineTablesOnly)
471             .Case("limited", codegenoptions::LimitedDebugInfo)
472             .Case("standalone", codegenoptions::FullDebugInfo)
473             .Default(~0U);
474     if (Val == ~0U)
475       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
476                                                 << A->getValue();
477     else
478       Opts.setDebugInfo(static_cast<codegenoptions::DebugInfoKind>(Val));
479   }
480   if (Arg *A = Args.getLastArg(OPT_debugger_tuning_EQ)) {
481     unsigned Val = llvm::StringSwitch<unsigned>(A->getValue())
482                        .Case("gdb", unsigned(llvm::DebuggerKind::GDB))
483                        .Case("lldb", unsigned(llvm::DebuggerKind::LLDB))
484                        .Case("sce", unsigned(llvm::DebuggerKind::SCE))
485                        .Default(~0U);
486     if (Val == ~0U)
487       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
488                                                 << A->getValue();
489     else
490       Opts.setDebuggerTuning(static_cast<llvm::DebuggerKind>(Val));
491   }
492   Opts.DwarfVersion = getLastArgIntValue(Args, OPT_dwarf_version_EQ, 0, Diags);
493   Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
494   Opts.EmitCodeView = Args.hasArg(OPT_gcodeview);
495   Opts.WholeProgramVTables = Args.hasArg(OPT_fwhole_program_vtables);
496   Opts.LTOVisibilityPublicStd = Args.hasArg(OPT_flto_visibility_public_std);
497   Opts.SplitDwarfFile = Args.getLastArgValue(OPT_split_dwarf_file);
498   Opts.DebugTypeExtRefs = Args.hasArg(OPT_dwarf_ext_refs);
499   Opts.DebugExplicitImport = Triple.isPS4CPU();
500 
501   for (const auto &Arg : Args.getAllArgValues(OPT_fdebug_prefix_map_EQ))
502     Opts.DebugPrefixMap.insert(StringRef(Arg).split('='));
503 
504   if (const Arg *A =
505           Args.getLastArg(OPT_emit_llvm_uselists, OPT_no_emit_llvm_uselists))
506     Opts.EmitLLVMUseLists = A->getOption().getID() == OPT_emit_llvm_uselists;
507 
508   Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
509   Opts.DisableLLVMPasses = Args.hasArg(OPT_disable_llvm_passes);
510   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
511   Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
512   Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
513     OPT_fuse_register_sized_bitfield_access);
514   Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
515   Opts.StructPathTBAA = !Args.hasArg(OPT_no_struct_path_tbaa);
516   Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
517   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
518   Opts.NoCommon = Args.hasArg(OPT_fno_common);
519   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
520   Opts.OptimizeSize = getOptimizationLevelSize(Args);
521   Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
522                             Args.hasArg(OPT_ffreestanding));
523   if (Opts.SimplifyLibCalls)
524     getAllNoBuiltinFuncValues(Args, Opts.NoBuiltinFuncs);
525   Opts.UnrollLoops =
526       Args.hasFlag(OPT_funroll_loops, OPT_fno_unroll_loops,
527                    (Opts.OptimizationLevel > 1));
528   Opts.RerollLoops = Args.hasArg(OPT_freroll_loops);
529 
530   Opts.DisableIntegratedAS = Args.hasArg(OPT_fno_integrated_as);
531   Opts.Autolink = !Args.hasArg(OPT_fno_autolink);
532   Opts.SampleProfileFile = Args.getLastArgValue(OPT_fprofile_sample_use_EQ);
533 
534   setPGOInstrumentor(Opts, Args, Diags);
535   Opts.InstrProfileOutput =
536       Args.getLastArgValue(OPT_fprofile_instrument_path_EQ);
537   Opts.ProfileInstrumentUsePath =
538       Args.getLastArgValue(OPT_fprofile_instrument_use_path_EQ);
539   if (!Opts.ProfileInstrumentUsePath.empty())
540     setPGOUseInstrumentor(Opts, Opts.ProfileInstrumentUsePath);
541 
542   Opts.CoverageMapping =
543       Args.hasFlag(OPT_fcoverage_mapping, OPT_fno_coverage_mapping, false);
544   Opts.DumpCoverageMapping = Args.hasArg(OPT_dump_coverage_mapping);
545   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
546   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
547   Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
548   Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
549   Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
550   Opts.CodeModel = getCodeModel(Args, Diags);
551   Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
552   Opts.DisableFPElim =
553       (Args.hasArg(OPT_mdisable_fp_elim) || Args.hasArg(OPT_pg));
554   Opts.DisableFree = Args.hasArg(OPT_disable_free);
555   Opts.DiscardValueNames = Args.hasArg(OPT_discard_value_names);
556   Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
557   Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
558   Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
559   Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
560   Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
561                        Args.hasArg(OPT_cl_finite_math_only) ||
562                        Args.hasArg(OPT_cl_fast_relaxed_math));
563   Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
564                        Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
565                        Args.hasArg(OPT_cl_finite_math_only) ||
566                        Args.hasArg(OPT_cl_fast_relaxed_math));
567   Opts.NoSignedZeros = (Args.hasArg(OPT_fno_signed_zeros) ||
568                         Args.hasArg(OPT_cl_no_signed_zeros));
569   Opts.ReciprocalMath = Args.hasArg(OPT_freciprocal_math);
570   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
571   Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
572   Opts.NumRegisterParameters = getLastArgIntValue(Args, OPT_mregparm, 0, Diags);
573   Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
574   Opts.FatalWarnings = Args.hasArg(OPT_massembler_fatal_warnings);
575   Opts.EnableSegmentedStacks = Args.hasArg(OPT_split_stacks);
576   Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
577   Opts.IncrementalLinkerCompatible =
578       Args.hasArg(OPT_mincremental_linker_compatible);
579   Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
580   Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
581   Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
582   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
583   Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
584   Opts.StrictVTablePointers = Args.hasArg(OPT_fstrict_vtable_pointers);
585   Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
586                       Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
587                       Args.hasArg(OPT_cl_fast_relaxed_math);
588   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
589   Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
590   Opts.ThreadModel = Args.getLastArgValue(OPT_mthread_model, "posix");
591   if (Opts.ThreadModel != "posix" && Opts.ThreadModel != "single")
592     Diags.Report(diag::err_drv_invalid_value)
593         << Args.getLastArg(OPT_mthread_model)->getAsString(Args)
594         << Opts.ThreadModel;
595   Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
596   Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
597 
598   Opts.FunctionSections = Args.hasFlag(OPT_ffunction_sections,
599                                        OPT_fno_function_sections, false);
600   Opts.DataSections = Args.hasFlag(OPT_fdata_sections,
601                                    OPT_fno_data_sections, false);
602   Opts.UniqueSectionNames = Args.hasFlag(OPT_funique_section_names,
603                                          OPT_fno_unique_section_names, true);
604 
605   Opts.MergeFunctions = Args.hasArg(OPT_fmerge_functions);
606 
607   Opts.NoUseJumpTables = Args.hasArg(OPT_fno_jump_tables);
608 
609   Opts.PrepareForLTO = Args.hasArg(OPT_flto, OPT_flto_EQ);
610   const Arg *A = Args.getLastArg(OPT_flto, OPT_flto_EQ);
611   Opts.EmitSummaryIndex = A && A->containsValue("thin");
612   if (Arg *A = Args.getLastArg(OPT_fthinlto_index_EQ)) {
613     if (IK != IK_LLVM_IR)
614       Diags.Report(diag::err_drv_argument_only_allowed_with)
615           << A->getAsString(Args) << "-x ir";
616     Opts.ThinLTOIndexFile = Args.getLastArgValue(OPT_fthinlto_index_EQ);
617   }
618 
619   Opts.MSVolatile = Args.hasArg(OPT_fms_volatile);
620 
621   Opts.VectorizeBB = Args.hasArg(OPT_vectorize_slp_aggressive);
622   Opts.VectorizeLoop = Args.hasArg(OPT_vectorize_loops);
623   Opts.VectorizeSLP = Args.hasArg(OPT_vectorize_slp);
624 
625   Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
626   Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
627 
628   Opts.DisableGCov = Args.hasArg(OPT_test_coverage);
629   Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
630   Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
631   if (Opts.EmitGcovArcs || Opts.EmitGcovNotes) {
632     Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
633     Opts.CoverageExtraChecksum = Args.hasArg(OPT_coverage_cfg_checksum);
634     Opts.CoverageNoFunctionNamesInData =
635         Args.hasArg(OPT_coverage_no_function_names_in_data);
636     Opts.CoverageExitBlockBeforeBody =
637         Args.hasArg(OPT_coverage_exit_block_before_body);
638     if (Args.hasArg(OPT_coverage_version_EQ)) {
639       StringRef CoverageVersion = Args.getLastArgValue(OPT_coverage_version_EQ);
640       if (CoverageVersion.size() != 4) {
641         Diags.Report(diag::err_drv_invalid_value)
642             << Args.getLastArg(OPT_coverage_version_EQ)->getAsString(Args)
643             << CoverageVersion;
644       } else {
645         memcpy(Opts.CoverageVersion, CoverageVersion.data(), 4);
646       }
647     }
648   }
649 	// Handle -fembed-bitcode option.
650   if (Arg *A = Args.getLastArg(OPT_fembed_bitcode_EQ)) {
651     StringRef Name = A->getValue();
652     unsigned Model = llvm::StringSwitch<unsigned>(Name)
653         .Case("off", CodeGenOptions::Embed_Off)
654         .Case("all", CodeGenOptions::Embed_All)
655         .Case("bitcode", CodeGenOptions::Embed_Bitcode)
656         .Case("marker", CodeGenOptions::Embed_Marker)
657         .Default(~0U);
658     if (Model == ~0U) {
659       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
660       Success = false;
661     } else
662       Opts.setEmbedBitcode(
663           static_cast<CodeGenOptions::EmbedBitcodeKind>(Model));
664   }
665   // FIXME: For backend options that are not yet recorded as function
666   // attributes in the IR, keep track of them so we can embed them in a
667   // separate data section and use them when building the bitcode.
668   if (Opts.getEmbedBitcode() == CodeGenOptions::Embed_All) {
669     for (const auto &A : Args) {
670       // Do not encode output and input.
671       if (A->getOption().getID() == options::OPT_o ||
672           A->getOption().getID() == options::OPT_INPUT ||
673           A->getOption().getID() == options::OPT_x ||
674           A->getOption().getID() == options::OPT_fembed_bitcode ||
675           (A->getOption().getGroup().isValid() &&
676            A->getOption().getGroup().getID() == options::OPT_W_Group))
677         continue;
678       ArgStringList ASL;
679       A->render(Args, ASL);
680       for (const auto &arg : ASL) {
681         StringRef ArgStr(arg);
682         Opts.CmdArgs.insert(Opts.CmdArgs.end(), ArgStr.begin(), ArgStr.end());
683         // using \00 to seperate each commandline options.
684         Opts.CmdArgs.push_back('\0');
685       }
686     }
687   }
688 
689   Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
690   Opts.XRayInstrumentFunctions = Args.hasArg(OPT_fxray_instrument);
691   Opts.XRayInstructionThreshold =
692       getLastArgIntValue(Args, OPT_fxray_instruction_threshold_, 200, Diags);
693   Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
694   Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
695   Opts.CompressDebugSections = Args.hasArg(OPT_compress_debug_sections);
696   Opts.RelaxELFRelocations = Args.hasArg(OPT_mrelax_relocations);
697   Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
698   for (auto A : Args.filtered(OPT_mlink_bitcode_file, OPT_mlink_cuda_bitcode)) {
699     unsigned LinkFlags = llvm::Linker::Flags::None;
700     if (A->getOption().matches(OPT_mlink_cuda_bitcode))
701       LinkFlags = llvm::Linker::Flags::LinkOnlyNeeded |
702                   llvm::Linker::Flags::InternalizeLinkedSymbols;
703     Opts.LinkBitcodeFiles.push_back(std::make_pair(LinkFlags, A->getValue()));
704   }
705   Opts.SanitizeCoverageType =
706       getLastArgIntValue(Args, OPT_fsanitize_coverage_type, 0, Diags);
707   Opts.SanitizeCoverageIndirectCalls =
708       Args.hasArg(OPT_fsanitize_coverage_indirect_calls);
709   Opts.SanitizeCoverageTraceBB = Args.hasArg(OPT_fsanitize_coverage_trace_bb);
710   Opts.SanitizeCoverageTraceCmp = Args.hasArg(OPT_fsanitize_coverage_trace_cmp);
711   Opts.SanitizeCoverage8bitCounters =
712       Args.hasArg(OPT_fsanitize_coverage_8bit_counters);
713   Opts.SanitizeCoverageTracePC = Args.hasArg(OPT_fsanitize_coverage_trace_pc);
714   Opts.SanitizeMemoryTrackOrigins =
715       getLastArgIntValue(Args, OPT_fsanitize_memory_track_origins_EQ, 0, Diags);
716   Opts.SanitizeMemoryUseAfterDtor =
717       Args.hasArg(OPT_fsanitize_memory_use_after_dtor);
718   Opts.SanitizeCfiCrossDso = Args.hasArg(OPT_fsanitize_cfi_cross_dso);
719   Opts.SanitizeStats = Args.hasArg(OPT_fsanitize_stats);
720   Opts.SanitizeAddressUseAfterScope =
721       Args.hasArg(OPT_fsanitize_address_use_after_scope);
722   Opts.SSPBufferSize =
723       getLastArgIntValue(Args, OPT_stack_protector_buffer_size, 8, Diags);
724   Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
725   if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
726     StringRef Val = A->getValue();
727     unsigned StackAlignment = Opts.StackAlignment;
728     Val.getAsInteger(10, StackAlignment);
729     Opts.StackAlignment = StackAlignment;
730   }
731 
732   if (Arg *A = Args.getLastArg(OPT_mstack_probe_size)) {
733     StringRef Val = A->getValue();
734     unsigned StackProbeSize = Opts.StackProbeSize;
735     Val.getAsInteger(0, StackProbeSize);
736     Opts.StackProbeSize = StackProbeSize;
737   }
738 
739   if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
740     StringRef Name = A->getValue();
741     unsigned Method = llvm::StringSwitch<unsigned>(Name)
742       .Case("legacy", CodeGenOptions::Legacy)
743       .Case("non-legacy", CodeGenOptions::NonLegacy)
744       .Case("mixed", CodeGenOptions::Mixed)
745       .Default(~0U);
746     if (Method == ~0U) {
747       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
748       Success = false;
749     } else {
750       Opts.setObjCDispatchMethod(
751         static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
752     }
753   }
754 
755   Opts.EmulatedTLS =
756       Args.hasFlag(OPT_femulated_tls, OPT_fno_emulated_tls, false);
757 
758   if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
759     StringRef Name = A->getValue();
760     unsigned Model = llvm::StringSwitch<unsigned>(Name)
761         .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
762         .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
763         .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
764         .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
765         .Default(~0U);
766     if (Model == ~0U) {
767       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
768       Success = false;
769     } else {
770       Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
771     }
772   }
773 
774   if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
775     StringRef Val = A->getValue();
776     if (Val == "fast")
777       Opts.setFPContractMode(CodeGenOptions::FPC_Fast);
778     else if (Val == "on")
779       Opts.setFPContractMode(CodeGenOptions::FPC_On);
780     else if (Val == "off")
781       Opts.setFPContractMode(CodeGenOptions::FPC_Off);
782     else
783       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
784   }
785 
786   if (Arg *A = Args.getLastArg(OPT_fpcc_struct_return, OPT_freg_struct_return)) {
787     if (A->getOption().matches(OPT_fpcc_struct_return)) {
788       Opts.setStructReturnConvention(CodeGenOptions::SRCK_OnStack);
789     } else {
790       assert(A->getOption().matches(OPT_freg_struct_return));
791       Opts.setStructReturnConvention(CodeGenOptions::SRCK_InRegs);
792     }
793   }
794 
795   Opts.DependentLibraries = Args.getAllArgValues(OPT_dependent_lib);
796   Opts.LinkerOptions = Args.getAllArgValues(OPT_linker_option);
797   bool NeedLocTracking = false;
798 
799   if (Arg *A = Args.getLastArg(OPT_Rpass_EQ)) {
800     Opts.OptimizationRemarkPattern =
801         GenerateOptimizationRemarkRegex(Diags, Args, A);
802     NeedLocTracking = true;
803   }
804 
805   if (Arg *A = Args.getLastArg(OPT_Rpass_missed_EQ)) {
806     Opts.OptimizationRemarkMissedPattern =
807         GenerateOptimizationRemarkRegex(Diags, Args, A);
808     NeedLocTracking = true;
809   }
810 
811   if (Arg *A = Args.getLastArg(OPT_Rpass_analysis_EQ)) {
812     Opts.OptimizationRemarkAnalysisPattern =
813         GenerateOptimizationRemarkRegex(Diags, Args, A);
814     NeedLocTracking = true;
815   }
816 
817   // If the user requested to use a sample profile for PGO, then the
818   // backend will need to track source location information so the profile
819   // can be incorporated into the IR.
820   if (!Opts.SampleProfileFile.empty())
821     NeedLocTracking = true;
822 
823   // If the user requested a flag that requires source locations available in
824   // the backend, make sure that the backend tracks source location information.
825   if (NeedLocTracking && Opts.getDebugInfo() == codegenoptions::NoDebugInfo)
826     Opts.setDebugInfo(codegenoptions::LocTrackingOnly);
827 
828   Opts.RewriteMapFiles = Args.getAllArgValues(OPT_frewrite_map_file);
829 
830   // Parse -fsanitize-recover= arguments.
831   // FIXME: Report unrecoverable sanitizers incorrectly specified here.
832   parseSanitizerKinds("-fsanitize-recover=",
833                       Args.getAllArgValues(OPT_fsanitize_recover_EQ), Diags,
834                       Opts.SanitizeRecover);
835   parseSanitizerKinds("-fsanitize-trap=",
836                       Args.getAllArgValues(OPT_fsanitize_trap_EQ), Diags,
837                       Opts.SanitizeTrap);
838 
839   Opts.CudaGpuBinaryFileNames =
840       Args.getAllArgValues(OPT_fcuda_include_gpubinary);
841 
842   Opts.Backchain = Args.hasArg(OPT_mbackchain);
843 
844   Opts.EmitCheckPathComponentsToStrip = getLastArgIntValue(
845       Args, OPT_fsanitize_undefined_strip_path_components_EQ, 0, Diags);
846 
847   return Success;
848 }
849 
ParseDependencyOutputArgs(DependencyOutputOptions & Opts,ArgList & Args)850 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
851                                       ArgList &Args) {
852   using namespace options;
853   Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
854   Opts.Targets = Args.getAllArgValues(OPT_MT);
855   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
856   Opts.IncludeModuleFiles = Args.hasArg(OPT_module_file_deps);
857   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
858   Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
859   Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
860   Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
861   Opts.PrintShowIncludes = Args.hasArg(OPT_show_includes);
862   Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
863   Opts.ModuleDependencyOutputDir =
864       Args.getLastArgValue(OPT_module_dependency_dir);
865   if (Args.hasArg(OPT_MV))
866     Opts.OutputFormat = DependencyOutputFormat::NMake;
867   // Add sanitizer blacklists as extra dependencies.
868   // They won't be discovered by the regular preprocessor, so
869   // we let make / ninja to know about this implicit dependency.
870   Opts.ExtraDeps = Args.getAllArgValues(OPT_fdepfile_entry);
871   auto ModuleFiles = Args.getAllArgValues(OPT_fmodule_file);
872   Opts.ExtraDeps.insert(Opts.ExtraDeps.end(), ModuleFiles.begin(),
873                         ModuleFiles.end());
874 }
875 
parseShowColorsArgs(const ArgList & Args,bool DefaultColor)876 static bool parseShowColorsArgs(const ArgList &Args, bool DefaultColor) {
877   // Color diagnostics default to auto ("on" if terminal supports) in the driver
878   // but default to off in cc1, needing an explicit OPT_fdiagnostics_color.
879   // Support both clang's -f[no-]color-diagnostics and gcc's
880   // -f[no-]diagnostics-colors[=never|always|auto].
881   enum {
882     Colors_On,
883     Colors_Off,
884     Colors_Auto
885   } ShowColors = DefaultColor ? Colors_Auto : Colors_Off;
886   for (Arg *A : Args) {
887     const Option &O = A->getOption();
888     if (!O.matches(options::OPT_fcolor_diagnostics) &&
889         !O.matches(options::OPT_fdiagnostics_color) &&
890         !O.matches(options::OPT_fno_color_diagnostics) &&
891         !O.matches(options::OPT_fno_diagnostics_color) &&
892         !O.matches(options::OPT_fdiagnostics_color_EQ))
893       continue;
894 
895     if (O.matches(options::OPT_fcolor_diagnostics) ||
896         O.matches(options::OPT_fdiagnostics_color)) {
897       ShowColors = Colors_On;
898     } else if (O.matches(options::OPT_fno_color_diagnostics) ||
899                O.matches(options::OPT_fno_diagnostics_color)) {
900       ShowColors = Colors_Off;
901     } else {
902       assert(O.matches(options::OPT_fdiagnostics_color_EQ));
903       StringRef Value(A->getValue());
904       if (Value == "always")
905         ShowColors = Colors_On;
906       else if (Value == "never")
907         ShowColors = Colors_Off;
908       else if (Value == "auto")
909         ShowColors = Colors_Auto;
910     }
911   }
912   if (ShowColors == Colors_On ||
913       (ShowColors == Colors_Auto && llvm::sys::Process::StandardErrHasColors()))
914     return true;
915   return false;
916 }
917 
ParseDiagnosticArgs(DiagnosticOptions & Opts,ArgList & Args,DiagnosticsEngine * Diags,bool DefaultDiagColor)918 bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
919                                 DiagnosticsEngine *Diags,
920                                 bool DefaultDiagColor) {
921   using namespace options;
922   bool Success = true;
923 
924   Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
925   if (Arg *A =
926           Args.getLastArg(OPT_diagnostic_serialized_file, OPT__serialize_diags))
927     Opts.DiagnosticSerializationFile = A->getValue();
928   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
929   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
930   Opts.Pedantic = Args.hasArg(OPT_pedantic);
931   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
932   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
933   Opts.ShowColors = parseShowColorsArgs(Args, DefaultDiagColor);
934   Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
935                                  OPT_fno_show_column,
936                                  /*Default=*/true);
937   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
938   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
939   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
940 
941   llvm::sys::Process::UseANSIEscapeCodes(Args.hasArg(OPT_fansi_escape_codes));
942 
943   // Default behavior is to not to show note include stacks.
944   Opts.ShowNoteIncludeStack = false;
945   if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
946                                OPT_fno_diagnostics_show_note_include_stack))
947     if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
948       Opts.ShowNoteIncludeStack = true;
949 
950   StringRef ShowOverloads =
951     Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
952   if (ShowOverloads == "best")
953     Opts.setShowOverloads(Ovl_Best);
954   else if (ShowOverloads == "all")
955     Opts.setShowOverloads(Ovl_All);
956   else {
957     Success = false;
958     if (Diags)
959       Diags->Report(diag::err_drv_invalid_value)
960       << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
961       << ShowOverloads;
962   }
963 
964   StringRef ShowCategory =
965     Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
966   if (ShowCategory == "none")
967     Opts.ShowCategories = 0;
968   else if (ShowCategory == "id")
969     Opts.ShowCategories = 1;
970   else if (ShowCategory == "name")
971     Opts.ShowCategories = 2;
972   else {
973     Success = false;
974     if (Diags)
975       Diags->Report(diag::err_drv_invalid_value)
976       << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
977       << ShowCategory;
978   }
979 
980   StringRef Format =
981     Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
982   if (Format == "clang")
983     Opts.setFormat(DiagnosticOptions::Clang);
984   else if (Format == "msvc")
985     Opts.setFormat(DiagnosticOptions::MSVC);
986   else if (Format == "msvc-fallback") {
987     Opts.setFormat(DiagnosticOptions::MSVC);
988     Opts.CLFallbackMode = true;
989   } else if (Format == "vi")
990     Opts.setFormat(DiagnosticOptions::Vi);
991   else {
992     Success = false;
993     if (Diags)
994       Diags->Report(diag::err_drv_invalid_value)
995       << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
996       << Format;
997   }
998 
999   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
1000   Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
1001   Opts.ShowPresumedLoc = !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
1002   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
1003   DiagnosticLevelMask DiagMask = DiagnosticLevelMask::None;
1004   Success &= parseDiagnosticLevelMask("-verify-ignore-unexpected=",
1005     Args.getAllArgValues(OPT_verify_ignore_unexpected_EQ),
1006     Diags, DiagMask);
1007   if (Args.hasArg(OPT_verify_ignore_unexpected))
1008     DiagMask = DiagnosticLevelMask::All;
1009   Opts.setVerifyIgnoreUnexpected(DiagMask);
1010   Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
1011   Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
1012   Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
1013   Opts.MacroBacktraceLimit =
1014       getLastArgIntValue(Args, OPT_fmacro_backtrace_limit,
1015                          DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
1016   Opts.TemplateBacktraceLimit = getLastArgIntValue(
1017       Args, OPT_ftemplate_backtrace_limit,
1018       DiagnosticOptions::DefaultTemplateBacktraceLimit, Diags);
1019   Opts.ConstexprBacktraceLimit = getLastArgIntValue(
1020       Args, OPT_fconstexpr_backtrace_limit,
1021       DiagnosticOptions::DefaultConstexprBacktraceLimit, Diags);
1022   Opts.SpellCheckingLimit = getLastArgIntValue(
1023       Args, OPT_fspell_checking_limit,
1024       DiagnosticOptions::DefaultSpellCheckingLimit, Diags);
1025   Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
1026                                     DiagnosticOptions::DefaultTabStop, Diags);
1027   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
1028     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
1029     if (Diags)
1030       Diags->Report(diag::warn_ignoring_ftabstop_value)
1031       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
1032   }
1033   Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
1034   addDiagnosticArgs(Args, OPT_W_Group, OPT_W_value_Group, Opts.Warnings);
1035   addDiagnosticArgs(Args, OPT_R_Group, OPT_R_value_Group, Opts.Remarks);
1036 
1037   return Success;
1038 }
1039 
ParseFileSystemArgs(FileSystemOptions & Opts,ArgList & Args)1040 static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
1041   Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
1042 }
1043 
1044 /// Parse the argument to the -ftest-module-file-extension
1045 /// command-line argument.
1046 ///
1047 /// \returns true on error, false on success.
parseTestModuleFileExtensionArg(StringRef Arg,std::string & BlockName,unsigned & MajorVersion,unsigned & MinorVersion,bool & Hashed,std::string & UserInfo)1048 static bool parseTestModuleFileExtensionArg(StringRef Arg,
1049                                             std::string &BlockName,
1050                                             unsigned &MajorVersion,
1051                                             unsigned &MinorVersion,
1052                                             bool &Hashed,
1053                                             std::string &UserInfo) {
1054   SmallVector<StringRef, 5> Args;
1055   Arg.split(Args, ':', 5);
1056   if (Args.size() < 5)
1057     return true;
1058 
1059   BlockName = Args[0];
1060   if (Args[1].getAsInteger(10, MajorVersion)) return true;
1061   if (Args[2].getAsInteger(10, MinorVersion)) return true;
1062   if (Args[3].getAsInteger(2, Hashed)) return true;
1063   if (Args.size() > 4)
1064     UserInfo = Args[4];
1065   return false;
1066 }
1067 
ParseFrontendArgs(FrontendOptions & Opts,ArgList & Args,DiagnosticsEngine & Diags)1068 static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
1069                                    DiagnosticsEngine &Diags) {
1070   using namespace options;
1071   Opts.ProgramAction = frontend::ParseSyntaxOnly;
1072   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
1073     switch (A->getOption().getID()) {
1074     default:
1075       llvm_unreachable("Invalid option in group!");
1076     case OPT_ast_list:
1077       Opts.ProgramAction = frontend::ASTDeclList; break;
1078     case OPT_ast_dump:
1079     case OPT_ast_dump_lookups:
1080       Opts.ProgramAction = frontend::ASTDump; break;
1081     case OPT_ast_print:
1082       Opts.ProgramAction = frontend::ASTPrint; break;
1083     case OPT_ast_view:
1084       Opts.ProgramAction = frontend::ASTView; break;
1085     case OPT_dump_raw_tokens:
1086       Opts.ProgramAction = frontend::DumpRawTokens; break;
1087     case OPT_dump_tokens:
1088       Opts.ProgramAction = frontend::DumpTokens; break;
1089     case OPT_S:
1090       Opts.ProgramAction = frontend::EmitAssembly; break;
1091     case OPT_emit_llvm_bc:
1092       Opts.ProgramAction = frontend::EmitBC; break;
1093     case OPT_emit_html:
1094       Opts.ProgramAction = frontend::EmitHTML; break;
1095     case OPT_emit_llvm:
1096       Opts.ProgramAction = frontend::EmitLLVM; break;
1097     case OPT_emit_llvm_only:
1098       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
1099     case OPT_emit_codegen_only:
1100       Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
1101     case OPT_emit_obj:
1102       Opts.ProgramAction = frontend::EmitObj; break;
1103     case OPT_fixit_EQ:
1104       Opts.FixItSuffix = A->getValue();
1105       // fall-through!
1106     case OPT_fixit:
1107       Opts.ProgramAction = frontend::FixIt; break;
1108     case OPT_emit_module:
1109       Opts.ProgramAction = frontend::GenerateModule; break;
1110     case OPT_emit_pch:
1111       Opts.ProgramAction = frontend::GeneratePCH; break;
1112     case OPT_emit_pth:
1113       Opts.ProgramAction = frontend::GeneratePTH; break;
1114     case OPT_init_only:
1115       Opts.ProgramAction = frontend::InitOnly; break;
1116     case OPT_fsyntax_only:
1117       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
1118     case OPT_module_file_info:
1119       Opts.ProgramAction = frontend::ModuleFileInfo; break;
1120     case OPT_verify_pch:
1121       Opts.ProgramAction = frontend::VerifyPCH; break;
1122     case OPT_print_decl_contexts:
1123       Opts.ProgramAction = frontend::PrintDeclContext; break;
1124     case OPT_print_preamble:
1125       Opts.ProgramAction = frontend::PrintPreamble; break;
1126     case OPT_E:
1127       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
1128     case OPT_rewrite_macros:
1129       Opts.ProgramAction = frontend::RewriteMacros; break;
1130     case OPT_rewrite_objc:
1131       Opts.ProgramAction = frontend::RewriteObjC; break;
1132     case OPT_rewrite_test:
1133       Opts.ProgramAction = frontend::RewriteTest; break;
1134     case OPT_analyze:
1135       Opts.ProgramAction = frontend::RunAnalysis; break;
1136     case OPT_migrate:
1137       Opts.ProgramAction = frontend::MigrateSource; break;
1138     case OPT_Eonly:
1139       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
1140     }
1141   }
1142 
1143   if (const Arg* A = Args.getLastArg(OPT_plugin)) {
1144     Opts.Plugins.emplace_back(A->getValue(0));
1145     Opts.ProgramAction = frontend::PluginAction;
1146     Opts.ActionName = A->getValue();
1147   }
1148   Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
1149   for (const Arg *AA : Args.filtered(OPT_plugin_arg))
1150     Opts.PluginArgs[AA->getValue(0)].emplace_back(AA->getValue(1));
1151 
1152   for (const std::string &Arg :
1153          Args.getAllArgValues(OPT_ftest_module_file_extension_EQ)) {
1154     std::string BlockName;
1155     unsigned MajorVersion;
1156     unsigned MinorVersion;
1157     bool Hashed;
1158     std::string UserInfo;
1159     if (parseTestModuleFileExtensionArg(Arg, BlockName, MajorVersion,
1160                                         MinorVersion, Hashed, UserInfo)) {
1161       Diags.Report(diag::err_test_module_file_extension_format) << Arg;
1162 
1163       continue;
1164     }
1165 
1166     // Add the testing module file extension.
1167     Opts.ModuleFileExtensions.push_back(
1168       new TestModuleFileExtension(BlockName, MajorVersion, MinorVersion,
1169                                   Hashed, UserInfo));
1170   }
1171 
1172   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
1173     Opts.CodeCompletionAt =
1174       ParsedSourceLocation::FromString(A->getValue());
1175     if (Opts.CodeCompletionAt.FileName.empty())
1176       Diags.Report(diag::err_drv_invalid_value)
1177         << A->getAsString(Args) << A->getValue();
1178   }
1179   Opts.DisableFree = Args.hasArg(OPT_disable_free);
1180 
1181   Opts.OutputFile = Args.getLastArgValue(OPT_o);
1182   Opts.Plugins = Args.getAllArgValues(OPT_load);
1183   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
1184   Opts.ShowHelp = Args.hasArg(OPT_help);
1185   Opts.ShowStats = Args.hasArg(OPT_print_stats);
1186   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
1187   Opts.ShowVersion = Args.hasArg(OPT_version);
1188   Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
1189   Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
1190   Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
1191   Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
1192   Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
1193   Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
1194   Opts.ASTDumpDecls = Args.hasArg(OPT_ast_dump);
1195   Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
1196   Opts.ASTDumpLookups = Args.hasArg(OPT_ast_dump_lookups);
1197   Opts.UseGlobalModuleIndex = !Args.hasArg(OPT_fno_modules_global_index);
1198   Opts.GenerateGlobalModuleIndex = Opts.UseGlobalModuleIndex;
1199   Opts.ModuleMapFiles = Args.getAllArgValues(OPT_fmodule_map_file);
1200   Opts.ModuleFiles = Args.getAllArgValues(OPT_fmodule_file);
1201   Opts.ModulesEmbedFiles = Args.getAllArgValues(OPT_fmodules_embed_file_EQ);
1202   Opts.ModulesEmbedAllFiles = Args.hasArg(OPT_fmodules_embed_all_files);
1203   Opts.IncludeTimestamps = !Args.hasArg(OPT_fno_pch_timestamp);
1204 
1205   Opts.CodeCompleteOpts.IncludeMacros
1206     = Args.hasArg(OPT_code_completion_macros);
1207   Opts.CodeCompleteOpts.IncludeCodePatterns
1208     = Args.hasArg(OPT_code_completion_patterns);
1209   Opts.CodeCompleteOpts.IncludeGlobals
1210     = !Args.hasArg(OPT_no_code_completion_globals);
1211   Opts.CodeCompleteOpts.IncludeBriefComments
1212     = Args.hasArg(OPT_code_completion_brief_comments);
1213 
1214   Opts.OverrideRecordLayoutsFile
1215     = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
1216   Opts.AuxTriple =
1217       llvm::Triple::normalize(Args.getLastArgValue(OPT_aux_triple));
1218   Opts.FindPchSource = Args.getLastArgValue(OPT_find_pch_source_EQ);
1219 
1220   if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
1221                                      OPT_arcmt_modify,
1222                                      OPT_arcmt_migrate)) {
1223     switch (A->getOption().getID()) {
1224     default:
1225       llvm_unreachable("missed a case");
1226     case OPT_arcmt_check:
1227       Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
1228       break;
1229     case OPT_arcmt_modify:
1230       Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
1231       break;
1232     case OPT_arcmt_migrate:
1233       Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
1234       break;
1235     }
1236   }
1237   Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
1238   Opts.ARCMTMigrateReportOut
1239     = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
1240   Opts.ARCMTMigrateEmitARCErrors
1241     = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
1242 
1243   if (Args.hasArg(OPT_objcmt_migrate_literals))
1244     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
1245   if (Args.hasArg(OPT_objcmt_migrate_subscripting))
1246     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
1247   if (Args.hasArg(OPT_objcmt_migrate_property_dot_syntax))
1248     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_PropertyDotSyntax;
1249   if (Args.hasArg(OPT_objcmt_migrate_property))
1250     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Property;
1251   if (Args.hasArg(OPT_objcmt_migrate_readonly_property))
1252     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadonlyProperty;
1253   if (Args.hasArg(OPT_objcmt_migrate_readwrite_property))
1254     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadwriteProperty;
1255   if (Args.hasArg(OPT_objcmt_migrate_annotation))
1256     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Annotation;
1257   if (Args.hasArg(OPT_objcmt_returns_innerpointer_property))
1258     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReturnsInnerPointerProperty;
1259   if (Args.hasArg(OPT_objcmt_migrate_instancetype))
1260     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Instancetype;
1261   if (Args.hasArg(OPT_objcmt_migrate_nsmacros))
1262     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsMacros;
1263   if (Args.hasArg(OPT_objcmt_migrate_protocol_conformance))
1264     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ProtocolConformance;
1265   if (Args.hasArg(OPT_objcmt_atomic_property))
1266     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_AtomicProperty;
1267   if (Args.hasArg(OPT_objcmt_ns_nonatomic_iosonly))
1268     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsAtomicIOSOnlyProperty;
1269   if (Args.hasArg(OPT_objcmt_migrate_designated_init))
1270     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_DesignatedInitializer;
1271   if (Args.hasArg(OPT_objcmt_migrate_all))
1272     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_MigrateDecls;
1273 
1274   Opts.ObjCMTWhiteListPath = Args.getLastArgValue(OPT_objcmt_whitelist_dir_path);
1275 
1276   if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
1277       Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
1278     Diags.Report(diag::err_drv_argument_not_allowed_with)
1279       << "ARC migration" << "ObjC migration";
1280   }
1281 
1282   InputKind DashX = IK_None;
1283   if (const Arg *A = Args.getLastArg(OPT_x)) {
1284     DashX = llvm::StringSwitch<InputKind>(A->getValue())
1285       .Case("c", IK_C)
1286       .Case("cl", IK_OpenCL)
1287       .Case("cuda", IK_CUDA)
1288       .Case("c++", IK_CXX)
1289       .Case("objective-c", IK_ObjC)
1290       .Case("objective-c++", IK_ObjCXX)
1291       .Case("cpp-output", IK_PreprocessedC)
1292       .Case("assembler-with-cpp", IK_Asm)
1293       .Case("c++-cpp-output", IK_PreprocessedCXX)
1294       .Case("cuda-cpp-output", IK_PreprocessedCuda)
1295       .Case("objective-c-cpp-output", IK_PreprocessedObjC)
1296       .Case("objc-cpp-output", IK_PreprocessedObjC)
1297       .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
1298       .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
1299       .Case("c-header", IK_C)
1300       .Case("cl-header", IK_OpenCL)
1301       .Case("objective-c-header", IK_ObjC)
1302       .Case("c++-header", IK_CXX)
1303       .Case("objective-c++-header", IK_ObjCXX)
1304       .Cases("ast", "pcm", IK_AST)
1305       .Case("ir", IK_LLVM_IR)
1306       .Case("renderscript", IK_RenderScript)
1307       .Default(IK_None);
1308     if (DashX == IK_None)
1309       Diags.Report(diag::err_drv_invalid_value)
1310         << A->getAsString(Args) << A->getValue();
1311   }
1312 
1313   // '-' is the default input if none is given.
1314   std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
1315   Opts.Inputs.clear();
1316   if (Inputs.empty())
1317     Inputs.push_back("-");
1318   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1319     InputKind IK = DashX;
1320     if (IK == IK_None) {
1321       IK = FrontendOptions::getInputKindForExtension(
1322         StringRef(Inputs[i]).rsplit('.').second);
1323       // FIXME: Remove this hack.
1324       if (i == 0)
1325         DashX = IK;
1326     }
1327     Opts.Inputs.emplace_back(std::move(Inputs[i]), IK);
1328   }
1329 
1330   return DashX;
1331 }
1332 
GetResourcesPath(const char * Argv0,void * MainAddr)1333 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1334                                                  void *MainAddr) {
1335   std::string ClangExecutable =
1336       llvm::sys::fs::getMainExecutable(Argv0, MainAddr);
1337   StringRef Dir = llvm::sys::path::parent_path(ClangExecutable);
1338 
1339   // Compute the path to the resource directory.
1340   StringRef ClangResourceDir(CLANG_RESOURCE_DIR);
1341   SmallString<128> P(Dir);
1342   if (ClangResourceDir != "")
1343     llvm::sys::path::append(P, ClangResourceDir);
1344   else
1345     llvm::sys::path::append(P, "..", Twine("lib") + CLANG_LIBDIR_SUFFIX,
1346                             "clang", CLANG_VERSION_STRING);
1347 
1348   return P.str();
1349 }
1350 
ParseHeaderSearchArgs(HeaderSearchOptions & Opts,ArgList & Args)1351 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1352   using namespace options;
1353   Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
1354   Opts.Verbose = Args.hasArg(OPT_v);
1355   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1356   Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
1357   Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1358   if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
1359     Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
1360   Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
1361   Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodules_cache_path);
1362   Opts.ModuleUserBuildPath = Args.getLastArgValue(OPT_fmodules_user_build_path);
1363   Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
1364   Opts.ImplicitModuleMaps = Args.hasArg(OPT_fimplicit_module_maps);
1365   Opts.ModuleMapFileHomeIsCwd = Args.hasArg(OPT_fmodule_map_file_home_is_cwd);
1366   Opts.ModuleCachePruneInterval =
1367       getLastArgIntValue(Args, OPT_fmodules_prune_interval, 7 * 24 * 60 * 60);
1368   Opts.ModuleCachePruneAfter =
1369       getLastArgIntValue(Args, OPT_fmodules_prune_after, 31 * 24 * 60 * 60);
1370   Opts.ModulesValidateOncePerBuildSession =
1371       Args.hasArg(OPT_fmodules_validate_once_per_build_session);
1372   Opts.BuildSessionTimestamp =
1373       getLastArgUInt64Value(Args, OPT_fbuild_session_timestamp, 0);
1374   Opts.ModulesValidateSystemHeaders =
1375       Args.hasArg(OPT_fmodules_validate_system_headers);
1376   if (const Arg *A = Args.getLastArg(OPT_fmodule_format_EQ))
1377     Opts.ModuleFormat = A->getValue();
1378 
1379   for (const Arg *A : Args.filtered(OPT_fmodules_ignore_macro)) {
1380     StringRef MacroDef = A->getValue();
1381     Opts.ModulesIgnoreMacros.insert(MacroDef.split('=').first);
1382   }
1383 
1384   // Add -I..., -F..., and -index-header-map options in order.
1385   bool IsIndexHeaderMap = false;
1386   bool IsSysrootSpecified =
1387       Args.hasArg(OPT__sysroot_EQ) || Args.hasArg(OPT_isysroot);
1388   for (const Arg *A : Args.filtered(OPT_I, OPT_F, OPT_index_header_map)) {
1389     if (A->getOption().matches(OPT_index_header_map)) {
1390       // -index-header-map applies to the next -I or -F.
1391       IsIndexHeaderMap = true;
1392       continue;
1393     }
1394 
1395     frontend::IncludeDirGroup Group =
1396         IsIndexHeaderMap ? frontend::IndexHeaderMap : frontend::Angled;
1397 
1398     bool IsFramework = A->getOption().matches(OPT_F);
1399     std::string Path = A->getValue();
1400 
1401     if (IsSysrootSpecified && !IsFramework && A->getValue()[0] == '=') {
1402       SmallString<32> Buffer;
1403       llvm::sys::path::append(Buffer, Opts.Sysroot,
1404                               llvm::StringRef(A->getValue()).substr(1));
1405       Path = Buffer.str();
1406     }
1407 
1408     Opts.AddPath(Path.c_str(), Group, IsFramework,
1409                  /*IgnoreSysroot*/ true);
1410     IsIndexHeaderMap = false;
1411   }
1412 
1413   // Add -iprefix/-iwithprefix/-iwithprefixbefore options.
1414   StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1415   for (const Arg *A :
1416        Args.filtered(OPT_iprefix, OPT_iwithprefix, OPT_iwithprefixbefore)) {
1417     if (A->getOption().matches(OPT_iprefix))
1418       Prefix = A->getValue();
1419     else if (A->getOption().matches(OPT_iwithprefix))
1420       Opts.AddPath(Prefix.str() + A->getValue(), frontend::After, false, true);
1421     else
1422       Opts.AddPath(Prefix.str() + A->getValue(), frontend::Angled, false, true);
1423   }
1424 
1425   for (const Arg *A : Args.filtered(OPT_idirafter))
1426     Opts.AddPath(A->getValue(), frontend::After, false, true);
1427   for (const Arg *A : Args.filtered(OPT_iquote))
1428     Opts.AddPath(A->getValue(), frontend::Quoted, false, true);
1429   for (const Arg *A : Args.filtered(OPT_isystem, OPT_iwithsysroot))
1430     Opts.AddPath(A->getValue(), frontend::System, false,
1431                  !A->getOption().matches(OPT_iwithsysroot));
1432   for (const Arg *A : Args.filtered(OPT_iframework))
1433     Opts.AddPath(A->getValue(), frontend::System, true, true);
1434 
1435   // Add the paths for the various language specific isystem flags.
1436   for (const Arg *A : Args.filtered(OPT_c_isystem))
1437     Opts.AddPath(A->getValue(), frontend::CSystem, false, true);
1438   for (const Arg *A : Args.filtered(OPT_cxx_isystem))
1439     Opts.AddPath(A->getValue(), frontend::CXXSystem, false, true);
1440   for (const Arg *A : Args.filtered(OPT_objc_isystem))
1441     Opts.AddPath(A->getValue(), frontend::ObjCSystem, false,true);
1442   for (const Arg *A : Args.filtered(OPT_objcxx_isystem))
1443     Opts.AddPath(A->getValue(), frontend::ObjCXXSystem, false, true);
1444 
1445   // Add the internal paths from a driver that detects standard include paths.
1446   for (const Arg *A :
1447        Args.filtered(OPT_internal_isystem, OPT_internal_externc_isystem)) {
1448     frontend::IncludeDirGroup Group = frontend::System;
1449     if (A->getOption().matches(OPT_internal_externc_isystem))
1450       Group = frontend::ExternCSystem;
1451     Opts.AddPath(A->getValue(), Group, false, true);
1452   }
1453 
1454   // Add the path prefixes which are implicitly treated as being system headers.
1455   for (const Arg *A :
1456        Args.filtered(OPT_system_header_prefix, OPT_no_system_header_prefix))
1457     Opts.AddSystemHeaderPrefix(
1458         A->getValue(), A->getOption().matches(OPT_system_header_prefix));
1459 
1460   for (const Arg *A : Args.filtered(OPT_ivfsoverlay))
1461     Opts.AddVFSOverlayFile(A->getValue());
1462 }
1463 
isOpenCL(LangStandard::Kind LangStd)1464 bool isOpenCL(LangStandard::Kind LangStd) {
1465   return LangStd == LangStandard::lang_opencl ||
1466          LangStd == LangStandard::lang_opencl11 ||
1467          LangStd == LangStandard::lang_opencl12 ||
1468          LangStd == LangStandard::lang_opencl20;
1469 }
1470 
setLangDefaults(LangOptions & Opts,InputKind IK,const llvm::Triple & T,PreprocessorOptions & PPOpts,LangStandard::Kind LangStd)1471 void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
1472                                          const llvm::Triple &T,
1473                                          PreprocessorOptions &PPOpts,
1474                                          LangStandard::Kind LangStd) {
1475   // Set some properties which depend solely on the input kind; it would be nice
1476   // to move these to the language standard, and have the driver resolve the
1477   // input kind + language standard.
1478   if (IK == IK_Asm) {
1479     Opts.AsmPreprocessor = 1;
1480   } else if (IK == IK_ObjC ||
1481              IK == IK_ObjCXX ||
1482              IK == IK_PreprocessedObjC ||
1483              IK == IK_PreprocessedObjCXX) {
1484     Opts.ObjC1 = Opts.ObjC2 = 1;
1485   }
1486 
1487   if (LangStd == LangStandard::lang_unspecified) {
1488     // Based on the base language, pick one.
1489     switch (IK) {
1490     case IK_None:
1491     case IK_AST:
1492     case IK_LLVM_IR:
1493       llvm_unreachable("Invalid input kind!");
1494     case IK_OpenCL:
1495       LangStd = LangStandard::lang_opencl;
1496       break;
1497     case IK_CUDA:
1498     case IK_PreprocessedCuda:
1499       LangStd = LangStandard::lang_cuda;
1500       break;
1501     case IK_Asm:
1502     case IK_C:
1503     case IK_PreprocessedC:
1504     case IK_ObjC:
1505     case IK_PreprocessedObjC:
1506       // The PS4 uses C99 as the default C standard.
1507       if (T.isPS4())
1508         LangStd = LangStandard::lang_gnu99;
1509       else
1510         LangStd = LangStandard::lang_gnu11;
1511       break;
1512     case IK_CXX:
1513     case IK_PreprocessedCXX:
1514     case IK_ObjCXX:
1515     case IK_PreprocessedObjCXX:
1516       LangStd = LangStandard::lang_gnucxx98;
1517       break;
1518     case IK_RenderScript:
1519       LangStd = LangStandard::lang_c99;
1520       break;
1521     }
1522   }
1523 
1524   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1525   Opts.LineComment = Std.hasLineComments();
1526   Opts.C99 = Std.isC99();
1527   Opts.C11 = Std.isC11();
1528   Opts.CPlusPlus = Std.isCPlusPlus();
1529   Opts.CPlusPlus11 = Std.isCPlusPlus11();
1530   Opts.CPlusPlus14 = Std.isCPlusPlus14();
1531   Opts.CPlusPlus1z = Std.isCPlusPlus1z();
1532   Opts.Digraphs = Std.hasDigraphs();
1533   Opts.GNUMode = Std.isGNUMode();
1534   Opts.GNUInline = Std.isC89();
1535   Opts.HexFloats = Std.hasHexFloats();
1536   Opts.ImplicitInt = Std.hasImplicitInt();
1537 
1538   // Set OpenCL Version.
1539   Opts.OpenCL = isOpenCL(LangStd) || IK == IK_OpenCL;
1540   if (LangStd == LangStandard::lang_opencl)
1541     Opts.OpenCLVersion = 100;
1542   else if (LangStd == LangStandard::lang_opencl11)
1543     Opts.OpenCLVersion = 110;
1544   else if (LangStd == LangStandard::lang_opencl12)
1545     Opts.OpenCLVersion = 120;
1546   else if (LangStd == LangStandard::lang_opencl20)
1547     Opts.OpenCLVersion = 200;
1548 
1549   // OpenCL has some additional defaults.
1550   if (Opts.OpenCL) {
1551     Opts.AltiVec = 0;
1552     Opts.ZVector = 0;
1553     Opts.CXXOperatorNames = 1;
1554     Opts.LaxVectorConversions = 0;
1555     Opts.DefaultFPContract = 1;
1556     Opts.NativeHalfType = 1;
1557     Opts.NativeHalfArgsAndReturns = 1;
1558     // Include default header file for OpenCL.
1559     if (Opts.IncludeDefaultHeader) {
1560       PPOpts.Includes.push_back("opencl-c.h");
1561     }
1562   }
1563 
1564   Opts.CUDA = IK == IK_CUDA || IK == IK_PreprocessedCuda ||
1565               LangStd == LangStandard::lang_cuda;
1566 
1567   Opts.RenderScript = IK == IK_RenderScript;
1568   if (Opts.RenderScript) {
1569     Opts.NativeHalfType = 1;
1570     Opts.NativeHalfArgsAndReturns = 1;
1571   }
1572 
1573   // OpenCL and C++ both have bool, true, false keywords.
1574   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1575 
1576   // OpenCL has half keyword
1577   Opts.Half = Opts.OpenCL;
1578 
1579   // C++ has wchar_t keyword.
1580   Opts.WChar = Opts.CPlusPlus;
1581 
1582   Opts.GNUKeywords = Opts.GNUMode;
1583   Opts.CXXOperatorNames = Opts.CPlusPlus;
1584 
1585   Opts.DollarIdents = !Opts.AsmPreprocessor;
1586 }
1587 
1588 /// Attempt to parse a visibility value out of the given argument.
parseVisibility(Arg * arg,ArgList & args,DiagnosticsEngine & diags)1589 static Visibility parseVisibility(Arg *arg, ArgList &args,
1590                                   DiagnosticsEngine &diags) {
1591   StringRef value = arg->getValue();
1592   if (value == "default") {
1593     return DefaultVisibility;
1594   } else if (value == "hidden" || value == "internal") {
1595     return HiddenVisibility;
1596   } else if (value == "protected") {
1597     // FIXME: diagnose if target does not support protected visibility
1598     return ProtectedVisibility;
1599   }
1600 
1601   diags.Report(diag::err_drv_invalid_value)
1602     << arg->getAsString(args) << value;
1603   return DefaultVisibility;
1604 }
1605 
ParseLangArgs(LangOptions & Opts,ArgList & Args,InputKind IK,const TargetOptions & TargetOpts,PreprocessorOptions & PPOpts,DiagnosticsEngine & Diags)1606 static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1607                           const TargetOptions &TargetOpts,
1608                           PreprocessorOptions &PPOpts,
1609                           DiagnosticsEngine &Diags) {
1610   // FIXME: Cleanup per-file based stuff.
1611   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1612   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1613     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1614 #define LANGSTANDARD(id, name, desc, features) \
1615       .Case(name, LangStandard::lang_##id)
1616 #define LANGSTANDARD_ALIAS(id, alias) \
1617       .Case(alias, LangStandard::lang_##id)
1618 #include "clang/Frontend/LangStandards.def"
1619       .Default(LangStandard::lang_unspecified);
1620     if (LangStd == LangStandard::lang_unspecified)
1621       Diags.Report(diag::err_drv_invalid_value)
1622         << A->getAsString(Args) << A->getValue();
1623     else {
1624       // Valid standard, check to make sure language and standard are
1625       // compatible.
1626       const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1627       switch (IK) {
1628       case IK_C:
1629       case IK_ObjC:
1630       case IK_PreprocessedC:
1631       case IK_PreprocessedObjC:
1632         if (!(Std.isC89() || Std.isC99()))
1633           Diags.Report(diag::err_drv_argument_not_allowed_with)
1634             << A->getAsString(Args) << "C/ObjC";
1635         break;
1636       case IK_CXX:
1637       case IK_ObjCXX:
1638       case IK_PreprocessedCXX:
1639       case IK_PreprocessedObjCXX:
1640         if (!Std.isCPlusPlus())
1641           Diags.Report(diag::err_drv_argument_not_allowed_with)
1642             << A->getAsString(Args) << "C++/ObjC++";
1643         break;
1644       case IK_OpenCL:
1645         if (!isOpenCL(LangStd))
1646           Diags.Report(diag::err_drv_argument_not_allowed_with)
1647             << A->getAsString(Args) << "OpenCL";
1648         break;
1649       case IK_CUDA:
1650       case IK_PreprocessedCuda:
1651         if (!Std.isCPlusPlus())
1652           Diags.Report(diag::err_drv_argument_not_allowed_with)
1653             << A->getAsString(Args) << "CUDA";
1654         break;
1655       default:
1656         break;
1657       }
1658     }
1659   }
1660 
1661   // -cl-std only applies for OpenCL language standards.
1662   // Override the -std option in this case.
1663   if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1664     LangStandard::Kind OpenCLLangStd
1665     = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1666     .Cases("cl", "CL", LangStandard::lang_opencl)
1667     .Cases("cl1.1", "CL1.1", LangStandard::lang_opencl11)
1668     .Cases("cl1.2", "CL1.2", LangStandard::lang_opencl12)
1669     .Cases("cl2.0", "CL2.0", LangStandard::lang_opencl20)
1670     .Default(LangStandard::lang_unspecified);
1671 
1672     if (OpenCLLangStd == LangStandard::lang_unspecified) {
1673       Diags.Report(diag::err_drv_invalid_value)
1674       << A->getAsString(Args) << A->getValue();
1675     }
1676     else
1677       LangStd = OpenCLLangStd;
1678   }
1679 
1680   Opts.IncludeDefaultHeader = Args.hasArg(OPT_finclude_default_header);
1681 
1682   llvm::Triple T(TargetOpts.Triple);
1683   CompilerInvocation::setLangDefaults(Opts, IK, T, PPOpts, LangStd);
1684 
1685   // -cl-strict-aliasing needs to emit diagnostic in the case where CL > 1.0.
1686   // This option should be deprecated for CL > 1.0 because
1687   // this option was added for compatibility with OpenCL 1.0.
1688   if (Args.getLastArg(OPT_cl_strict_aliasing)
1689        && Opts.OpenCLVersion > 100) {
1690     std::string VerSpec = llvm::to_string(Opts.OpenCLVersion / 100) +
1691                           std::string(".") +
1692                           llvm::to_string((Opts.OpenCLVersion % 100) / 10);
1693     Diags.Report(diag::warn_option_invalid_ocl_version)
1694       << VerSpec << Args.getLastArg(OPT_cl_strict_aliasing)->getAsString(Args);
1695   }
1696 
1697   // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1698   // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1699   // while a subset (the non-C++ GNU keywords) is provided by GCC's
1700   // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1701   // name, as it doesn't seem a useful distinction.
1702   Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1703                                   Opts.GNUKeywords);
1704 
1705   if (Args.hasArg(OPT_fno_operator_names))
1706     Opts.CXXOperatorNames = 0;
1707 
1708   if (Args.hasArg(OPT_fcuda_is_device))
1709     Opts.CUDAIsDevice = 1;
1710 
1711   if (Args.hasArg(OPT_fcuda_allow_variadic_functions))
1712     Opts.CUDAAllowVariadicFunctions = 1;
1713 
1714   if (Args.hasArg(OPT_fno_cuda_host_device_constexpr))
1715     Opts.CUDAHostDeviceConstexpr = 0;
1716 
1717   if (Opts.CUDAIsDevice && Args.hasArg(OPT_fcuda_flush_denormals_to_zero))
1718     Opts.CUDADeviceFlushDenormalsToZero = 1;
1719 
1720   if (Opts.CUDAIsDevice && Args.hasArg(OPT_fcuda_approx_transcendentals))
1721     Opts.CUDADeviceApproxTranscendentals = 1;
1722 
1723   if (Opts.ObjC1) {
1724     if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1725       StringRef value = arg->getValue();
1726       if (Opts.ObjCRuntime.tryParse(value))
1727         Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1728     }
1729 
1730     if (Args.hasArg(OPT_fobjc_gc_only))
1731       Opts.setGC(LangOptions::GCOnly);
1732     else if (Args.hasArg(OPT_fobjc_gc))
1733       Opts.setGC(LangOptions::HybridGC);
1734     else if (Args.hasArg(OPT_fobjc_arc)) {
1735       Opts.ObjCAutoRefCount = 1;
1736       if (!Opts.ObjCRuntime.allowsARC())
1737         Diags.Report(diag::err_arc_unsupported_on_runtime);
1738     }
1739 
1740     // ObjCWeakRuntime tracks whether the runtime supports __weak, not
1741     // whether the feature is actually enabled.  This is predominantly
1742     // determined by -fobjc-runtime, but we allow it to be overridden
1743     // from the command line for testing purposes.
1744     if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1745       Opts.ObjCWeakRuntime = 1;
1746     else
1747       Opts.ObjCWeakRuntime = Opts.ObjCRuntime.allowsWeak();
1748 
1749     // ObjCWeak determines whether __weak is actually enabled.
1750     // Note that we allow -fno-objc-weak to disable this even in ARC mode.
1751     if (auto weakArg = Args.getLastArg(OPT_fobjc_weak, OPT_fno_objc_weak)) {
1752       if (!weakArg->getOption().matches(OPT_fobjc_weak)) {
1753         assert(!Opts.ObjCWeak);
1754       } else if (Opts.getGC() != LangOptions::NonGC) {
1755         Diags.Report(diag::err_objc_weak_with_gc);
1756       } else if (!Opts.ObjCWeakRuntime) {
1757         Diags.Report(diag::err_objc_weak_unsupported);
1758       } else {
1759         Opts.ObjCWeak = 1;
1760       }
1761     } else if (Opts.ObjCAutoRefCount) {
1762       Opts.ObjCWeak = Opts.ObjCWeakRuntime;
1763     }
1764 
1765     if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1766       Opts.ObjCInferRelatedResultType = 0;
1767 
1768     if (Args.hasArg(OPT_fobjc_subscripting_legacy_runtime))
1769       Opts.ObjCSubscriptingLegacyRuntime =
1770         (Opts.ObjCRuntime.getKind() == ObjCRuntime::FragileMacOSX);
1771   }
1772 
1773   if (Args.hasArg(OPT_fgnu89_inline)) {
1774     if (Opts.CPlusPlus)
1775       Diags.Report(diag::err_drv_argument_not_allowed_with) << "-fgnu89-inline"
1776                                                             << "C++/ObjC++";
1777     else
1778       Opts.GNUInline = 1;
1779   }
1780 
1781   if (Args.hasArg(OPT_fapple_kext)) {
1782     if (!Opts.CPlusPlus)
1783       Diags.Report(diag::warn_c_kext);
1784     else
1785       Opts.AppleKext = 1;
1786   }
1787 
1788   if (Args.hasArg(OPT_print_ivar_layout))
1789     Opts.ObjCGCBitmapPrint = 1;
1790   if (Args.hasArg(OPT_fno_constant_cfstrings))
1791     Opts.NoConstantCFStrings = 1;
1792 
1793   if (Args.hasArg(OPT_faltivec))
1794     Opts.AltiVec = 1;
1795 
1796   if (Args.hasArg(OPT_fzvector))
1797     Opts.ZVector = 1;
1798 
1799   if (Args.hasArg(OPT_pthread))
1800     Opts.POSIXThreads = 1;
1801 
1802   // The value-visibility mode defaults to "default".
1803   if (Arg *visOpt = Args.getLastArg(OPT_fvisibility)) {
1804     Opts.setValueVisibilityMode(parseVisibility(visOpt, Args, Diags));
1805   } else {
1806     Opts.setValueVisibilityMode(DefaultVisibility);
1807   }
1808 
1809   // The type-visibility mode defaults to the value-visibility mode.
1810   if (Arg *typeVisOpt = Args.getLastArg(OPT_ftype_visibility)) {
1811     Opts.setTypeVisibilityMode(parseVisibility(typeVisOpt, Args, Diags));
1812   } else {
1813     Opts.setTypeVisibilityMode(Opts.getValueVisibilityMode());
1814   }
1815 
1816   if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1817     Opts.InlineVisibilityHidden = 1;
1818 
1819   if (Args.hasArg(OPT_ftrapv)) {
1820     Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1821     // Set the handler, if one is specified.
1822     Opts.OverflowHandler =
1823         Args.getLastArgValue(OPT_ftrapv_handler);
1824   }
1825   else if (Args.hasArg(OPT_fwrapv))
1826     Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1827 
1828   Opts.MSVCCompat = Args.hasArg(OPT_fms_compatibility);
1829   Opts.MicrosoftExt = Opts.MSVCCompat || Args.hasArg(OPT_fms_extensions);
1830   Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
1831   Opts.MSCompatibilityVersion = 0;
1832   if (const Arg *A = Args.getLastArg(OPT_fms_compatibility_version)) {
1833     VersionTuple VT;
1834     if (VT.tryParse(A->getValue()))
1835       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
1836                                                 << A->getValue();
1837     Opts.MSCompatibilityVersion = VT.getMajor() * 10000000 +
1838                                   VT.getMinor().getValueOr(0) * 100000 +
1839                                   VT.getSubminor().getValueOr(0);
1840   }
1841 
1842   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1843   // is specified, or -std is set to a conforming mode.
1844   // Trigraphs are disabled by default in c++1z onwards.
1845   Opts.Trigraphs = !Opts.GNUMode && !Opts.MSVCCompat && !Opts.CPlusPlus1z;
1846   Opts.Trigraphs =
1847       Args.hasFlag(OPT_ftrigraphs, OPT_fno_trigraphs, Opts.Trigraphs);
1848 
1849   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1850                                    OPT_fno_dollars_in_identifiers,
1851                                    Opts.DollarIdents);
1852   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1853   Opts.VtorDispMode = getLastArgIntValue(Args, OPT_vtordisp_mode_EQ, 1, Diags);
1854   Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1855   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1856   Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
1857                                    Opts.ConstStrings);
1858   if (Args.hasArg(OPT_fno_lax_vector_conversions))
1859     Opts.LaxVectorConversions = 0;
1860   if (Args.hasArg(OPT_fno_threadsafe_statics))
1861     Opts.ThreadsafeStatics = 0;
1862   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1863   Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
1864   Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
1865   Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1866   Opts.ExternCNoUnwind = Args.hasArg(OPT_fexternc_nounwind);
1867   Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
1868 
1869   Opts.RTTI = Opts.CPlusPlus && !Args.hasArg(OPT_fno_rtti);
1870   Opts.RTTIData = Opts.RTTI && !Args.hasArg(OPT_fno_rtti_data);
1871   Opts.Blocks = Args.hasArg(OPT_fblocks) || (Opts.OpenCL
1872     && Opts.OpenCLVersion >= 200);
1873   Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
1874   Opts.Coroutines = Args.hasArg(OPT_fcoroutines);
1875   Opts.Modules = Args.hasArg(OPT_fmodules);
1876   Opts.ModulesStrictDeclUse = Args.hasArg(OPT_fmodules_strict_decluse);
1877   Opts.ModulesDeclUse =
1878       Args.hasArg(OPT_fmodules_decluse) || Opts.ModulesStrictDeclUse;
1879   Opts.ModulesLocalVisibility =
1880       Args.hasArg(OPT_fmodules_local_submodule_visibility);
1881   Opts.ModulesSearchAll = Opts.Modules &&
1882     !Args.hasArg(OPT_fno_modules_search_all) &&
1883     Args.hasArg(OPT_fmodules_search_all);
1884   Opts.ModulesErrorRecovery = !Args.hasArg(OPT_fno_modules_error_recovery);
1885   Opts.ImplicitModules = !Args.hasArg(OPT_fno_implicit_modules);
1886   Opts.CharIsSigned = Opts.OpenCL || !Args.hasArg(OPT_fno_signed_char);
1887   Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
1888   Opts.ShortWChar = Args.hasFlag(OPT_fshort_wchar, OPT_fno_short_wchar, false);
1889   Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1890   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1891   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1892   if (!Opts.NoBuiltin)
1893     getAllNoBuiltinFuncValues(Args, Opts.NoBuiltinFuncs);
1894   Opts.NoMathBuiltin = Args.hasArg(OPT_fno_math_builtin);
1895   Opts.SizedDeallocation = Args.hasArg(OPT_fsized_deallocation);
1896   Opts.ConceptsTS = Args.hasArg(OPT_fconcepts_ts);
1897   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1898   Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1899   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1900   Opts.MathErrno = !Opts.OpenCL && Args.hasArg(OPT_fmath_errno);
1901   Opts.InstantiationDepth =
1902       getLastArgIntValue(Args, OPT_ftemplate_depth, 256, Diags);
1903   Opts.ArrowDepth =
1904       getLastArgIntValue(Args, OPT_foperator_arrow_depth, 256, Diags);
1905   Opts.ConstexprCallDepth =
1906       getLastArgIntValue(Args, OPT_fconstexpr_depth, 512, Diags);
1907   Opts.ConstexprStepLimit =
1908       getLastArgIntValue(Args, OPT_fconstexpr_steps, 1048576, Diags);
1909   Opts.BracketDepth = getLastArgIntValue(Args, OPT_fbracket_depth, 256, Diags);
1910   Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
1911   Opts.NumLargeByValueCopy =
1912       getLastArgIntValue(Args, OPT_Wlarge_by_value_copy_EQ, 0, Diags);
1913   Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
1914   Opts.ObjCConstantStringClass =
1915     Args.getLastArgValue(OPT_fconstant_string_class);
1916   Opts.ObjCDefaultSynthProperties =
1917     !Args.hasArg(OPT_disable_objc_default_synthesize_properties);
1918   Opts.EncodeExtendedBlockSig =
1919     Args.hasArg(OPT_fencode_extended_block_signature);
1920   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1921   Opts.PackStruct = getLastArgIntValue(Args, OPT_fpack_struct_EQ, 0, Diags);
1922   Opts.MaxTypeAlign = getLastArgIntValue(Args, OPT_fmax_type_align_EQ, 0, Diags);
1923   Opts.AlignDouble = Args.hasArg(OPT_malign_double);
1924   Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
1925   Opts.PIE = Args.hasArg(OPT_pic_is_pie);
1926   Opts.Static = Args.hasArg(OPT_static_define);
1927   Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
1928   Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
1929                         || Args.hasArg(OPT_fdump_record_layouts);
1930   Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1931   Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1932   Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1933   Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
1934   Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
1935   Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
1936   Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
1937   Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
1938   Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
1939   Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
1940   Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
1941   Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
1942   Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name_EQ);
1943   Opts.AppExt = Args.hasArg(OPT_fapplication_extension);
1944   Opts.ModuleFeatures = Args.getAllArgValues(OPT_fmodule_feature);
1945   std::sort(Opts.ModuleFeatures.begin(), Opts.ModuleFeatures.end());
1946   Opts.NativeHalfType |= Args.hasArg(OPT_fnative_half_type);
1947   Opts.NativeHalfArgsAndReturns |= Args.hasArg(OPT_fnative_half_arguments_and_returns);
1948   // Enable HalfArgsAndReturns if present in Args or if NativeHalfArgsAndReturns
1949   // is enabled.
1950   Opts.HalfArgsAndReturns = Args.hasArg(OPT_fallow_half_arguments_and_returns)
1951                             | Opts.NativeHalfArgsAndReturns;
1952   Opts.GNUAsm = !Args.hasArg(OPT_fno_gnu_inline_asm);
1953 
1954   // __declspec is enabled by default for the PS4 by the driver, and also
1955   // enabled for Microsoft Extensions or Borland Extensions, here.
1956   //
1957   // FIXME: __declspec is also currently enabled for CUDA, but isn't really a
1958   // CUDA extension, however it is required for supporting cuda_builtin_vars.h,
1959   // which uses __declspec(property). Once that has been rewritten in terms of
1960   // something more generic, remove the Opts.CUDA term here.
1961   Opts.DeclSpecKeyword =
1962       Args.hasFlag(OPT_fdeclspec, OPT_fno_declspec,
1963                    (Opts.MicrosoftExt || Opts.Borland || Opts.CUDA));
1964 
1965   // For now, we only support local submodule visibility in C++ (because we
1966   // heavily depend on the ODR for merging redefinitions).
1967   if (Opts.ModulesLocalVisibility && !Opts.CPlusPlus)
1968     Diags.Report(diag::err_drv_argument_not_allowed_with)
1969         << "-fmodules-local-submodule-visibility" << "C";
1970 
1971   if (Arg *A = Args.getLastArg(OPT_faddress_space_map_mangling_EQ)) {
1972     switch (llvm::StringSwitch<unsigned>(A->getValue())
1973       .Case("target", LangOptions::ASMM_Target)
1974       .Case("no", LangOptions::ASMM_Off)
1975       .Case("yes", LangOptions::ASMM_On)
1976       .Default(255)) {
1977     default:
1978       Diags.Report(diag::err_drv_invalid_value)
1979         << "-faddress-space-map-mangling=" << A->getValue();
1980       break;
1981     case LangOptions::ASMM_Target:
1982       Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Target);
1983       break;
1984     case LangOptions::ASMM_On:
1985       Opts.setAddressSpaceMapMangling(LangOptions::ASMM_On);
1986       break;
1987     case LangOptions::ASMM_Off:
1988       Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Off);
1989       break;
1990     }
1991   }
1992 
1993   if (Arg *A = Args.getLastArg(OPT_fms_memptr_rep_EQ)) {
1994     LangOptions::PragmaMSPointersToMembersKind InheritanceModel =
1995         llvm::StringSwitch<LangOptions::PragmaMSPointersToMembersKind>(
1996             A->getValue())
1997             .Case("single",
1998                   LangOptions::PPTMK_FullGeneralitySingleInheritance)
1999             .Case("multiple",
2000                   LangOptions::PPTMK_FullGeneralityMultipleInheritance)
2001             .Case("virtual",
2002                   LangOptions::PPTMK_FullGeneralityVirtualInheritance)
2003             .Default(LangOptions::PPTMK_BestCase);
2004     if (InheritanceModel == LangOptions::PPTMK_BestCase)
2005       Diags.Report(diag::err_drv_invalid_value)
2006           << "-fms-memptr-rep=" << A->getValue();
2007 
2008     Opts.setMSPointerToMemberRepresentationMethod(InheritanceModel);
2009   }
2010 
2011   // Check for MS default calling conventions being specified.
2012   if (Arg *A = Args.getLastArg(OPT_fdefault_calling_conv_EQ)) {
2013     LangOptions::DefaultCallingConvention DefaultCC =
2014         llvm::StringSwitch<LangOptions::DefaultCallingConvention>(
2015             A->getValue())
2016             .Case("cdecl", LangOptions::DCC_CDecl)
2017             .Case("fastcall", LangOptions::DCC_FastCall)
2018             .Case("stdcall", LangOptions::DCC_StdCall)
2019             .Case("vectorcall", LangOptions::DCC_VectorCall)
2020             .Default(LangOptions::DCC_None);
2021     if (DefaultCC == LangOptions::DCC_None)
2022       Diags.Report(diag::err_drv_invalid_value)
2023           << "-fdefault-calling-conv=" << A->getValue();
2024 
2025     llvm::Triple T(TargetOpts.Triple);
2026     llvm::Triple::ArchType Arch = T.getArch();
2027     bool emitError = (DefaultCC == LangOptions::DCC_FastCall ||
2028                   DefaultCC == LangOptions::DCC_StdCall) &&
2029                  Arch != llvm::Triple::x86;
2030     emitError |= DefaultCC == LangOptions::DCC_VectorCall &&
2031                  !(Arch == llvm::Triple::x86 || Arch == llvm::Triple::x86_64);
2032     if (emitError)
2033       Diags.Report(diag::err_drv_argument_not_allowed_with)
2034           << A->getSpelling() << T.getTriple();
2035     else
2036       Opts.setDefaultCallingConv(DefaultCC);
2037   }
2038 
2039   // -mrtd option
2040   if (Arg *A = Args.getLastArg(OPT_mrtd)) {
2041     if (Opts.getDefaultCallingConv() != LangOptions::DCC_None)
2042       Diags.Report(diag::err_drv_argument_not_allowed_with)
2043           << A->getSpelling() << "-fdefault-calling-conv";
2044     else {
2045       llvm::Triple T(TargetOpts.Triple);
2046       if (T.getArch() != llvm::Triple::x86)
2047         Diags.Report(diag::err_drv_argument_not_allowed_with)
2048             << A->getSpelling() << T.getTriple();
2049       else
2050         Opts.setDefaultCallingConv(LangOptions::DCC_StdCall);
2051     }
2052   }
2053 
2054   // Check if -fopenmp is specified.
2055   Opts.OpenMP = Args.hasArg(options::OPT_fopenmp) ? 1 : 0;
2056   Opts.OpenMPUseTLS =
2057       Opts.OpenMP && !Args.hasArg(options::OPT_fnoopenmp_use_tls);
2058   Opts.OpenMPIsDevice =
2059       Opts.OpenMP && Args.hasArg(options::OPT_fopenmp_is_device);
2060 
2061   if (Opts.OpenMP) {
2062     int Version =
2063         getLastArgIntValue(Args, OPT_fopenmp_version_EQ, Opts.OpenMP, Diags);
2064     if (Version != 0)
2065       Opts.OpenMP = Version;
2066     // Provide diagnostic when a given target is not expected to be an OpenMP
2067     // device or host.
2068     if (!Opts.OpenMPIsDevice) {
2069       switch (T.getArch()) {
2070       default:
2071         break;
2072       // Add unsupported host targets here:
2073       case llvm::Triple::nvptx:
2074       case llvm::Triple::nvptx64:
2075         Diags.Report(clang::diag::err_drv_omp_host_target_not_supported)
2076             << TargetOpts.Triple;
2077         break;
2078       }
2079     }
2080   }
2081 
2082   // Get the OpenMP target triples if any.
2083   if (Arg *A = Args.getLastArg(options::OPT_fopenmp_targets_EQ)) {
2084 
2085     for (unsigned i = 0; i < A->getNumValues(); ++i) {
2086       llvm::Triple TT(A->getValue(i));
2087 
2088       if (TT.getArch() == llvm::Triple::UnknownArch)
2089         Diags.Report(clang::diag::err_drv_invalid_omp_target) << A->getValue(i);
2090       else
2091         Opts.OMPTargetTriples.push_back(TT);
2092     }
2093   }
2094 
2095   // Get OpenMP host file path if any and report if a non existent file is
2096   // found
2097   if (Arg *A = Args.getLastArg(options::OPT_fopenmp_host_ir_file_path)) {
2098     Opts.OMPHostIRFile = A->getValue();
2099     if (!llvm::sys::fs::exists(Opts.OMPHostIRFile))
2100       Diags.Report(clang::diag::err_drv_omp_host_ir_file_not_found)
2101           << Opts.OMPHostIRFile;
2102   }
2103 
2104   // Record whether the __DEPRECATED define was requested.
2105   Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
2106                                  OPT_fno_deprecated_macro,
2107                                  Opts.Deprecated);
2108 
2109   // FIXME: Eliminate this dependency.
2110   unsigned Opt = getOptimizationLevel(Args, IK, Diags),
2111        OptSize = getOptimizationLevelSize(Args);
2112   Opts.Optimize = Opt != 0;
2113   Opts.OptimizeSize = OptSize != 0;
2114 
2115   // This is the __NO_INLINE__ define, which just depends on things like the
2116   // optimization level and -fno-inline, not actually whether the backend has
2117   // inlining enabled.
2118   Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
2119 
2120   Opts.FastMath = Args.hasArg(OPT_ffast_math) ||
2121       Args.hasArg(OPT_cl_fast_relaxed_math);
2122   Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only) ||
2123       Args.hasArg(OPT_cl_finite_math_only) ||
2124       Args.hasArg(OPT_cl_fast_relaxed_math);
2125   Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
2126                       Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
2127                       Args.hasArg(OPT_cl_fast_relaxed_math);
2128 
2129   Opts.RetainCommentsFromSystemHeaders =
2130       Args.hasArg(OPT_fretain_comments_from_system_headers);
2131 
2132   unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
2133   switch (SSP) {
2134   default:
2135     Diags.Report(diag::err_drv_invalid_value)
2136       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
2137     break;
2138   case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
2139   case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
2140   case 2: Opts.setStackProtector(LangOptions::SSPStrong); break;
2141   case 3: Opts.setStackProtector(LangOptions::SSPReq); break;
2142   }
2143 
2144   // Parse -fsanitize= arguments.
2145   parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
2146                       Diags, Opts.Sanitize);
2147   // -fsanitize-address-field-padding=N has to be a LangOpt, parse it here.
2148   Opts.SanitizeAddressFieldPadding =
2149       getLastArgIntValue(Args, OPT_fsanitize_address_field_padding, 0, Diags);
2150   Opts.SanitizerBlacklistFiles = Args.getAllArgValues(OPT_fsanitize_blacklist);
2151 }
2152 
ParsePreprocessorArgs(PreprocessorOptions & Opts,ArgList & Args,FileManager & FileMgr,DiagnosticsEngine & Diags)2153 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
2154                                   FileManager &FileMgr,
2155                                   DiagnosticsEngine &Diags) {
2156   using namespace options;
2157   Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
2158   Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
2159   if (const Arg *A = Args.getLastArg(OPT_token_cache))
2160       Opts.TokenCache = A->getValue();
2161   else
2162     Opts.TokenCache = Opts.ImplicitPTHInclude;
2163   Opts.UsePredefines = !Args.hasArg(OPT_undef);
2164   Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
2165   Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
2166 
2167   Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
2168   for (const Arg *A : Args.filtered(OPT_error_on_deserialized_pch_decl))
2169     Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
2170 
2171   if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
2172     StringRef Value(A->getValue());
2173     size_t Comma = Value.find(',');
2174     unsigned Bytes = 0;
2175     unsigned EndOfLine = 0;
2176 
2177     if (Comma == StringRef::npos ||
2178         Value.substr(0, Comma).getAsInteger(10, Bytes) ||
2179         Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
2180       Diags.Report(diag::err_drv_preamble_format);
2181     else {
2182       Opts.PrecompiledPreambleBytes.first = Bytes;
2183       Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
2184     }
2185   }
2186 
2187   // Add macros from the command line.
2188   for (const Arg *A : Args.filtered(OPT_D, OPT_U)) {
2189     if (A->getOption().matches(OPT_D))
2190       Opts.addMacroDef(A->getValue());
2191     else
2192       Opts.addMacroUndef(A->getValue());
2193   }
2194 
2195   Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
2196 
2197   // Add the ordered list of -includes.
2198   for (const Arg *A : Args.filtered(OPT_include))
2199     Opts.Includes.emplace_back(A->getValue());
2200 
2201   for (const Arg *A : Args.filtered(OPT_chain_include))
2202     Opts.ChainedIncludes.emplace_back(A->getValue());
2203 
2204   for (const Arg *A : Args.filtered(OPT_remap_file)) {
2205     std::pair<StringRef, StringRef> Split = StringRef(A->getValue()).split(';');
2206 
2207     if (Split.second.empty()) {
2208       Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
2209       continue;
2210     }
2211 
2212     Opts.addRemappedFile(Split.first, Split.second);
2213   }
2214 
2215   if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
2216     StringRef Name = A->getValue();
2217     unsigned Library = llvm::StringSwitch<unsigned>(Name)
2218       .Case("libc++", ARCXX_libcxx)
2219       .Case("libstdc++", ARCXX_libstdcxx)
2220       .Case("none", ARCXX_nolib)
2221       .Default(~0U);
2222     if (Library == ~0U)
2223       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
2224     else
2225       Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
2226   }
2227 }
2228 
ParsePreprocessorOutputArgs(PreprocessorOutputOptions & Opts,ArgList & Args,frontend::ActionKind Action)2229 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
2230                                         ArgList &Args,
2231                                         frontend::ActionKind Action) {
2232   using namespace options;
2233 
2234   switch (Action) {
2235   case frontend::ASTDeclList:
2236   case frontend::ASTDump:
2237   case frontend::ASTPrint:
2238   case frontend::ASTView:
2239   case frontend::EmitAssembly:
2240   case frontend::EmitBC:
2241   case frontend::EmitHTML:
2242   case frontend::EmitLLVM:
2243   case frontend::EmitLLVMOnly:
2244   case frontend::EmitCodeGenOnly:
2245   case frontend::EmitObj:
2246   case frontend::FixIt:
2247   case frontend::GenerateModule:
2248   case frontend::GeneratePCH:
2249   case frontend::GeneratePTH:
2250   case frontend::ParseSyntaxOnly:
2251   case frontend::ModuleFileInfo:
2252   case frontend::VerifyPCH:
2253   case frontend::PluginAction:
2254   case frontend::PrintDeclContext:
2255   case frontend::RewriteObjC:
2256   case frontend::RewriteTest:
2257   case frontend::RunAnalysis:
2258   case frontend::MigrateSource:
2259     Opts.ShowCPP = 0;
2260     break;
2261 
2262   case frontend::DumpRawTokens:
2263   case frontend::DumpTokens:
2264   case frontend::InitOnly:
2265   case frontend::PrintPreamble:
2266   case frontend::PrintPreprocessedInput:
2267   case frontend::RewriteMacros:
2268   case frontend::RunPreprocessorOnly:
2269     Opts.ShowCPP = !Args.hasArg(OPT_dM);
2270     break;
2271   }
2272 
2273   Opts.ShowComments = Args.hasArg(OPT_C);
2274   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
2275   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
2276   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
2277   Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
2278   Opts.UseLineDirectives = Args.hasArg(OPT_fuse_line_directives);
2279 }
2280 
ParseTargetArgs(TargetOptions & Opts,ArgList & Args,DiagnosticsEngine & Diags)2281 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args,
2282                             DiagnosticsEngine &Diags) {
2283   using namespace options;
2284   Opts.ABI = Args.getLastArgValue(OPT_target_abi);
2285   if (Arg *A = Args.getLastArg(OPT_meabi)) {
2286     StringRef Value = A->getValue();
2287     llvm::EABI EABIVersion = llvm::StringSwitch<llvm::EABI>(Value)
2288                                  .Case("default", llvm::EABI::Default)
2289                                  .Case("4", llvm::EABI::EABI4)
2290                                  .Case("5", llvm::EABI::EABI5)
2291                                  .Case("gnu", llvm::EABI::GNU)
2292                                  .Default(llvm::EABI::Unknown);
2293     if (EABIVersion == llvm::EABI::Unknown)
2294       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
2295                                                 << Value;
2296     else
2297       Opts.EABIVersion = Value;
2298   }
2299   Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
2300   Opts.FPMath = Args.getLastArgValue(OPT_mfpmath);
2301   Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
2302   Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
2303   Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
2304   Opts.Reciprocals = Args.getAllArgValues(OPT_mrecip_EQ);
2305   // Use the default target triple if unspecified.
2306   if (Opts.Triple.empty())
2307     Opts.Triple = llvm::sys::getDefaultTargetTriple();
2308 }
2309 
CreateFromArgs(CompilerInvocation & Res,const char * const * ArgBegin,const char * const * ArgEnd,DiagnosticsEngine & Diags)2310 bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
2311                                         const char *const *ArgBegin,
2312                                         const char *const *ArgEnd,
2313                                         DiagnosticsEngine &Diags) {
2314   bool Success = true;
2315 
2316   // Parse the arguments.
2317   std::unique_ptr<OptTable> Opts(createDriverOptTable());
2318   const unsigned IncludedFlagsBitmask = options::CC1Option;
2319   unsigned MissingArgIndex, MissingArgCount;
2320   InputArgList Args =
2321       Opts->ParseArgs(llvm::makeArrayRef(ArgBegin, ArgEnd), MissingArgIndex,
2322                       MissingArgCount, IncludedFlagsBitmask);
2323   LangOptions &LangOpts = *Res.getLangOpts();
2324 
2325   // Check for missing argument error.
2326   if (MissingArgCount) {
2327     Diags.Report(diag::err_drv_missing_argument)
2328         << Args.getArgString(MissingArgIndex) << MissingArgCount;
2329     Success = false;
2330   }
2331 
2332   // Issue errors on unknown arguments.
2333   for (const Arg *A : Args.filtered(OPT_UNKNOWN)) {
2334     Diags.Report(diag::err_drv_unknown_argument) << A->getAsString(Args);
2335     Success = false;
2336   }
2337 
2338   Success &= ParseAnalyzerArgs(*Res.getAnalyzerOpts(), Args, Diags);
2339   Success &= ParseMigratorArgs(Res.getMigratorOpts(), Args);
2340   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), Args);
2341   Success &= ParseDiagnosticArgs(Res.getDiagnosticOpts(), Args, &Diags,
2342                                  false /*DefaultDiagColor*/);
2343   ParseCommentArgs(LangOpts.CommentOpts, Args);
2344   ParseFileSystemArgs(Res.getFileSystemOpts(), Args);
2345   // FIXME: We shouldn't have to pass the DashX option around here
2346   InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), Args, Diags);
2347   ParseTargetArgs(Res.getTargetOpts(), Args, Diags);
2348   Success &= ParseCodeGenArgs(Res.getCodeGenOpts(), Args, DashX, Diags,
2349                               Res.getTargetOpts());
2350   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), Args);
2351   if (DashX == IK_AST || DashX == IK_LLVM_IR) {
2352     // ObjCAAutoRefCount and Sanitize LangOpts are used to setup the
2353     // PassManager in BackendUtil.cpp. They need to be initializd no matter
2354     // what the input type is.
2355     if (Args.hasArg(OPT_fobjc_arc))
2356       LangOpts.ObjCAutoRefCount = 1;
2357     // PIClevel and PIELevel are needed during code generation and this should be
2358     // set regardless of the input type.
2359     LangOpts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
2360     LangOpts.PIE = Args.hasArg(OPT_pic_is_pie);
2361     parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
2362                         Diags, LangOpts.Sanitize);
2363   } else {
2364     // Other LangOpts are only initialzed when the input is not AST or LLVM IR.
2365     ParseLangArgs(LangOpts, Args, DashX, Res.getTargetOpts(),
2366       Res.getPreprocessorOpts(), Diags);
2367     if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
2368       LangOpts.ObjCExceptions = 1;
2369   }
2370 
2371   if (LangOpts.CUDA) {
2372     // During CUDA device-side compilation, the aux triple is the
2373     // triple used for host compilation.
2374     if (LangOpts.CUDAIsDevice)
2375       Res.getTargetOpts().HostTriple = Res.getFrontendOpts().AuxTriple;
2376 
2377     // Set default FP_CONTRACT to FAST.
2378     if (!Args.hasArg(OPT_ffp_contract))
2379       Res.getCodeGenOpts().setFPContractMode(CodeGenOptions::FPC_Fast);
2380   }
2381 
2382   // FIXME: Override value name discarding when asan or msan is used because the
2383   // backend passes depend on the name of the alloca in order to print out
2384   // names.
2385   Res.getCodeGenOpts().DiscardValueNames &=
2386       !LangOpts.Sanitize.has(SanitizerKind::Address) &&
2387       !LangOpts.Sanitize.has(SanitizerKind::Memory);
2388 
2389   // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
2390   // PCH file and find the original header name. Remove the need to do that in
2391   // ParsePreprocessorArgs and remove the FileManager
2392   // parameters from the function and the "FileManager.h" #include.
2393   FileManager FileMgr(Res.getFileSystemOpts());
2394   ParsePreprocessorArgs(Res.getPreprocessorOpts(), Args, FileMgr, Diags);
2395   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), Args,
2396                               Res.getFrontendOpts().ProgramAction);
2397   return Success;
2398 }
2399 
getModuleHash() const2400 std::string CompilerInvocation::getModuleHash() const {
2401   // Note: For QoI reasons, the things we use as a hash here should all be
2402   // dumped via the -module-info flag.
2403   using llvm::hash_code;
2404   using llvm::hash_value;
2405   using llvm::hash_combine;
2406 
2407   // Start the signature with the compiler version.
2408   // FIXME: We'd rather use something more cryptographically sound than
2409   // CityHash, but this will do for now.
2410   hash_code code = hash_value(getClangFullRepositoryVersion());
2411 
2412   // Extend the signature with the language options
2413 #define LANGOPT(Name, Bits, Default, Description) \
2414    code = hash_combine(code, LangOpts->Name);
2415 #define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
2416   code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
2417 #define BENIGN_LANGOPT(Name, Bits, Default, Description)
2418 #define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
2419 #include "clang/Basic/LangOptions.def"
2420 
2421   for (StringRef Feature : LangOpts->ModuleFeatures)
2422     code = hash_combine(code, Feature);
2423 
2424   // Extend the signature with the target options.
2425   code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
2426                       TargetOpts->ABI);
2427   for (unsigned i = 0, n = TargetOpts->FeaturesAsWritten.size(); i != n; ++i)
2428     code = hash_combine(code, TargetOpts->FeaturesAsWritten[i]);
2429 
2430   // Extend the signature with preprocessor options.
2431   const PreprocessorOptions &ppOpts = getPreprocessorOpts();
2432   const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
2433   code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
2434 
2435   for (std::vector<std::pair<std::string, bool/*isUndef*/>>::const_iterator
2436             I = getPreprocessorOpts().Macros.begin(),
2437          IEnd = getPreprocessorOpts().Macros.end();
2438        I != IEnd; ++I) {
2439     // If we're supposed to ignore this macro for the purposes of modules,
2440     // don't put it into the hash.
2441     if (!hsOpts.ModulesIgnoreMacros.empty()) {
2442       // Check whether we're ignoring this macro.
2443       StringRef MacroDef = I->first;
2444       if (hsOpts.ModulesIgnoreMacros.count(MacroDef.split('=').first))
2445         continue;
2446     }
2447 
2448     code = hash_combine(code, I->first, I->second);
2449   }
2450 
2451   // Extend the signature with the sysroot and other header search options.
2452   code = hash_combine(code, hsOpts.Sysroot,
2453                       hsOpts.ModuleFormat,
2454                       hsOpts.UseDebugInfo,
2455                       hsOpts.UseBuiltinIncludes,
2456                       hsOpts.UseStandardSystemIncludes,
2457                       hsOpts.UseStandardCXXIncludes,
2458                       hsOpts.UseLibcxx);
2459   code = hash_combine(code, hsOpts.ResourceDir);
2460 
2461   // Extend the signature with the user build path.
2462   code = hash_combine(code, hsOpts.ModuleUserBuildPath);
2463 
2464   // Extend the signature with the module file extensions.
2465   const FrontendOptions &frontendOpts = getFrontendOpts();
2466   for (const auto &ext : frontendOpts.ModuleFileExtensions) {
2467     code = ext->hashExtension(code);
2468   }
2469 
2470   // Darwin-specific hack: if we have a sysroot, use the contents and
2471   // modification time of
2472   //   $sysroot/System/Library/CoreServices/SystemVersion.plist
2473   // as part of the module hash.
2474   if (!hsOpts.Sysroot.empty()) {
2475     SmallString<128> systemVersionFile;
2476     systemVersionFile += hsOpts.Sysroot;
2477     llvm::sys::path::append(systemVersionFile, "System");
2478     llvm::sys::path::append(systemVersionFile, "Library");
2479     llvm::sys::path::append(systemVersionFile, "CoreServices");
2480     llvm::sys::path::append(systemVersionFile, "SystemVersion.plist");
2481 
2482     llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> buffer =
2483         llvm::MemoryBuffer::getFile(systemVersionFile);
2484     if (buffer) {
2485       code = hash_combine(code, buffer.get()->getBuffer());
2486 
2487       struct stat statBuf;
2488       if (stat(systemVersionFile.c_str(), &statBuf) == 0)
2489         code = hash_combine(code, statBuf.st_mtime);
2490     }
2491   }
2492 
2493   return llvm::APInt(64, code).toString(36, /*Signed=*/false);
2494 }
2495 
2496 namespace clang {
2497 
2498 template<typename IntTy>
getLastArgIntValueImpl(const ArgList & Args,OptSpecifier Id,IntTy Default,DiagnosticsEngine * Diags)2499 static IntTy getLastArgIntValueImpl(const ArgList &Args, OptSpecifier Id,
2500                                     IntTy Default,
2501                                     DiagnosticsEngine *Diags) {
2502   IntTy Res = Default;
2503   if (Arg *A = Args.getLastArg(Id)) {
2504     if (StringRef(A->getValue()).getAsInteger(10, Res)) {
2505       if (Diags)
2506         Diags->Report(diag::err_drv_invalid_int_value) << A->getAsString(Args)
2507                                                        << A->getValue();
2508     }
2509   }
2510   return Res;
2511 }
2512 
2513 
2514 // Declared in clang/Frontend/Utils.h.
getLastArgIntValue(const ArgList & Args,OptSpecifier Id,int Default,DiagnosticsEngine * Diags)2515 int getLastArgIntValue(const ArgList &Args, OptSpecifier Id, int Default,
2516                        DiagnosticsEngine *Diags) {
2517   return getLastArgIntValueImpl<int>(Args, Id, Default, Diags);
2518 }
2519 
getLastArgUInt64Value(const ArgList & Args,OptSpecifier Id,uint64_t Default,DiagnosticsEngine * Diags)2520 uint64_t getLastArgUInt64Value(const ArgList &Args, OptSpecifier Id,
2521                                uint64_t Default,
2522                                DiagnosticsEngine *Diags) {
2523   return getLastArgIntValueImpl<uint64_t>(Args, Id, Default, Diags);
2524 }
2525 
BuryPointer(const void * Ptr)2526 void BuryPointer(const void *Ptr) {
2527   // This function may be called only a small fixed amount of times per each
2528   // invocation, otherwise we do actually have a leak which we want to report.
2529   // If this function is called more than kGraveYardMaxSize times, the pointers
2530   // will not be properly buried and a leak detector will report a leak, which
2531   // is what we want in such case.
2532   static const size_t kGraveYardMaxSize = 16;
2533   LLVM_ATTRIBUTE_UNUSED static const void *GraveYard[kGraveYardMaxSize];
2534   static std::atomic<unsigned> GraveYardSize;
2535   unsigned Idx = GraveYardSize++;
2536   if (Idx >= kGraveYardMaxSize)
2537     return;
2538   GraveYard[Idx] = Ptr;
2539 }
2540 
2541 IntrusiveRefCntPtr<vfs::FileSystem>
createVFSFromCompilerInvocation(const CompilerInvocation & CI,DiagnosticsEngine & Diags)2542 createVFSFromCompilerInvocation(const CompilerInvocation &CI,
2543                                 DiagnosticsEngine &Diags) {
2544   if (CI.getHeaderSearchOpts().VFSOverlayFiles.empty())
2545     return vfs::getRealFileSystem();
2546 
2547   IntrusiveRefCntPtr<vfs::OverlayFileSystem>
2548     Overlay(new vfs::OverlayFileSystem(vfs::getRealFileSystem()));
2549   // earlier vfs files are on the bottom
2550   for (const std::string &File : CI.getHeaderSearchOpts().VFSOverlayFiles) {
2551     llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Buffer =
2552         llvm::MemoryBuffer::getFile(File);
2553     if (!Buffer) {
2554       Diags.Report(diag::err_missing_vfs_overlay_file) << File;
2555       return IntrusiveRefCntPtr<vfs::FileSystem>();
2556     }
2557 
2558     IntrusiveRefCntPtr<vfs::FileSystem> FS = vfs::getVFSFromYAML(
2559         std::move(Buffer.get()), /*DiagHandler*/ nullptr, File);
2560     if (!FS.get()) {
2561       Diags.Report(diag::err_invalid_vfs_overlay) << File;
2562       return IntrusiveRefCntPtr<vfs::FileSystem>();
2563     }
2564     Overlay->pushOverlay(FS);
2565   }
2566   return Overlay;
2567 }
2568 } // end namespace clang
2569