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/Frontend/CompilerInvocation.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/FrontendDiagnostic.h"
19 #include "clang/Frontend/LangStandard.h"
20 #include "clang/Frontend/Utils.h"
21 #include "clang/Lex/HeaderSearchOptions.h"
22 #include "clang/Serialization/ASTReader.h"
23 #include "clang/Serialization/ModuleFileExtension.h"
24 #include "llvm/ADT/Hashing.h"
25 #include "llvm/ADT/STLExtras.h"
26 #include "llvm/ADT/SmallVector.h"
27 #include "llvm/ADT/StringExtras.h"
28 #include "llvm/ADT/StringSwitch.h"
29 #include "llvm/ADT/Triple.h"
30 #include "llvm/Linker/Linker.h"
31 #include "llvm/Option/Arg.h"
32 #include "llvm/Option/ArgList.h"
33 #include "llvm/Option/OptTable.h"
34 #include "llvm/Option/Option.h"
35 #include "llvm/Support/CodeGen.h"
36 #include "llvm/Support/ErrorHandling.h"
37 #include "llvm/Support/FileSystem.h"
38 #include "llvm/Support/Host.h"
39 #include "llvm/Support/Path.h"
40 #include "llvm/Support/Process.h"
41 #include "llvm/Target/TargetOptions.h"
42 #include <atomic>
43 #include <memory>
44 #include <sys/stat.h>
45 #include <system_error>
46 using namespace clang;
47
48 //===----------------------------------------------------------------------===//
49 // Initialization.
50 //===----------------------------------------------------------------------===//
51
CompilerInvocationBase()52 CompilerInvocationBase::CompilerInvocationBase()
53 : LangOpts(new LangOptions()), TargetOpts(new TargetOptions()),
54 DiagnosticOpts(new DiagnosticOptions()),
55 HeaderSearchOpts(new HeaderSearchOptions()),
56 PreprocessorOpts(new PreprocessorOptions()) {}
57
CompilerInvocationBase(const CompilerInvocationBase & X)58 CompilerInvocationBase::CompilerInvocationBase(const CompilerInvocationBase &X)
59 : RefCountedBase<CompilerInvocation>(),
60 LangOpts(new LangOptions(*X.getLangOpts())),
61 TargetOpts(new TargetOptions(X.getTargetOpts())),
62 DiagnosticOpts(new DiagnosticOptions(X.getDiagnosticOpts())),
63 HeaderSearchOpts(new HeaderSearchOptions(X.getHeaderSearchOpts())),
64 PreprocessorOpts(new PreprocessorOptions(X.getPreprocessorOpts())) {}
65
~CompilerInvocationBase()66 CompilerInvocationBase::~CompilerInvocationBase() {}
67
68 //===----------------------------------------------------------------------===//
69 // Deserialization (from args)
70 //===----------------------------------------------------------------------===//
71
72 using namespace clang::driver;
73 using namespace clang::driver::options;
74 using namespace llvm::opt;
75
76 //
77
getOptimizationLevel(ArgList & Args,InputKind IK,DiagnosticsEngine & Diags)78 static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
79 DiagnosticsEngine &Diags) {
80 unsigned DefaultOpt = 0;
81 if (IK == IK_OpenCL && !Args.hasArg(OPT_cl_opt_disable))
82 DefaultOpt = 2;
83
84 if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
85 if (A->getOption().matches(options::OPT_O0))
86 return 0;
87
88 if (A->getOption().matches(options::OPT_Ofast))
89 return 3;
90
91 assert (A->getOption().matches(options::OPT_O));
92
93 StringRef S(A->getValue());
94 if (S == "s" || S == "z" || S.empty())
95 return 2;
96
97 return getLastArgIntValue(Args, OPT_O, DefaultOpt, Diags);
98 }
99
100 return DefaultOpt;
101 }
102
getOptimizationLevelSize(ArgList & Args)103 static unsigned getOptimizationLevelSize(ArgList &Args) {
104 if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
105 if (A->getOption().matches(options::OPT_O)) {
106 switch (A->getValue()[0]) {
107 default:
108 return 0;
109 case 's':
110 return 1;
111 case 'z':
112 return 2;
113 }
114 }
115 }
116 return 0;
117 }
118
addDiagnosticArgs(ArgList & Args,OptSpecifier Group,OptSpecifier GroupWithValue,std::vector<std::string> & Diagnostics)119 static void addDiagnosticArgs(ArgList &Args, OptSpecifier Group,
120 OptSpecifier GroupWithValue,
121 std::vector<std::string> &Diagnostics) {
122 for (Arg *A : Args.filtered(Group)) {
123 if (A->getOption().getKind() == Option::FlagClass) {
124 // The argument is a pure flag (such as OPT_Wall or OPT_Wdeprecated). Add
125 // its name (minus the "W" or "R" at the beginning) to the warning list.
126 Diagnostics.push_back(A->getOption().getName().drop_front(1));
127 } else if (A->getOption().matches(GroupWithValue)) {
128 // This is -Wfoo= or -Rfoo=, where foo is the name of the diagnostic group.
129 Diagnostics.push_back(A->getOption().getName().drop_front(1).rtrim("=-"));
130 } else {
131 // Otherwise, add its value (for OPT_W_Joined and similar).
132 for (const char *Arg : A->getValues())
133 Diagnostics.emplace_back(Arg);
134 }
135 }
136 }
137
ParseAnalyzerArgs(AnalyzerOptions & Opts,ArgList & Args,DiagnosticsEngine & Diags)138 static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
139 DiagnosticsEngine &Diags) {
140 using namespace options;
141 bool Success = true;
142 if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
143 StringRef Name = A->getValue();
144 AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
145 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
146 .Case(CMDFLAG, NAME##Model)
147 #include "clang/StaticAnalyzer/Core/Analyses.def"
148 .Default(NumStores);
149 if (Value == NumStores) {
150 Diags.Report(diag::err_drv_invalid_value)
151 << A->getAsString(Args) << Name;
152 Success = false;
153 } else {
154 Opts.AnalysisStoreOpt = Value;
155 }
156 }
157
158 if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
159 StringRef Name = A->getValue();
160 AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
161 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
162 .Case(CMDFLAG, NAME##Model)
163 #include "clang/StaticAnalyzer/Core/Analyses.def"
164 .Default(NumConstraints);
165 if (Value == NumConstraints) {
166 Diags.Report(diag::err_drv_invalid_value)
167 << A->getAsString(Args) << Name;
168 Success = false;
169 } else {
170 Opts.AnalysisConstraintsOpt = Value;
171 }
172 }
173
174 if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
175 StringRef Name = A->getValue();
176 AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
177 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN) \
178 .Case(CMDFLAG, PD_##NAME)
179 #include "clang/StaticAnalyzer/Core/Analyses.def"
180 .Default(NUM_ANALYSIS_DIAG_CLIENTS);
181 if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
182 Diags.Report(diag::err_drv_invalid_value)
183 << A->getAsString(Args) << Name;
184 Success = false;
185 } else {
186 Opts.AnalysisDiagOpt = Value;
187 }
188 }
189
190 if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
191 StringRef Name = A->getValue();
192 AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
193 #define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
194 .Case(CMDFLAG, NAME)
195 #include "clang/StaticAnalyzer/Core/Analyses.def"
196 .Default(NumPurgeModes);
197 if (Value == NumPurgeModes) {
198 Diags.Report(diag::err_drv_invalid_value)
199 << A->getAsString(Args) << Name;
200 Success = false;
201 } else {
202 Opts.AnalysisPurgeOpt = Value;
203 }
204 }
205
206 if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
207 StringRef Name = A->getValue();
208 AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
209 #define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
210 .Case(CMDFLAG, NAME)
211 #include "clang/StaticAnalyzer/Core/Analyses.def"
212 .Default(NumInliningModes);
213 if (Value == NumInliningModes) {
214 Diags.Report(diag::err_drv_invalid_value)
215 << A->getAsString(Args) << Name;
216 Success = false;
217 } else {
218 Opts.InliningMode = Value;
219 }
220 }
221
222 Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
223 Opts.DisableAllChecks = Args.hasArg(OPT_analyzer_disable_all_checks);
224
225 Opts.visualizeExplodedGraphWithGraphViz =
226 Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
227 Opts.visualizeExplodedGraphWithUbiGraph =
228 Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
229 Opts.NoRetryExhausted = Args.hasArg(OPT_analyzer_disable_retry_exhausted);
230 Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
231 Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
232 Opts.AnalyzeNestedBlocks =
233 Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
234 Opts.eagerlyAssumeBinOpBifurcation = Args.hasArg(OPT_analyzer_eagerly_assume);
235 Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
236 Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
237 Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
238 Opts.maxBlockVisitOnPath =
239 getLastArgIntValue(Args, OPT_analyzer_max_loop, 4, Diags);
240 Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
241 Opts.InlineMaxStackDepth =
242 getLastArgIntValue(Args, OPT_analyzer_inline_max_stack_depth,
243 Opts.InlineMaxStackDepth, Diags);
244
245 Opts.CheckersControlList.clear();
246 for (const Arg *A :
247 Args.filtered(OPT_analyzer_checker, OPT_analyzer_disable_checker)) {
248 A->claim();
249 bool enable = (A->getOption().getID() == OPT_analyzer_checker);
250 // We can have a list of comma separated checker names, e.g:
251 // '-analyzer-checker=cocoa,unix'
252 StringRef checkerList = A->getValue();
253 SmallVector<StringRef, 4> checkers;
254 checkerList.split(checkers, ",");
255 for (StringRef checker : checkers)
256 Opts.CheckersControlList.emplace_back(checker, enable);
257 }
258
259 // Go through the analyzer configuration options.
260 for (const Arg *A : Args.filtered(OPT_analyzer_config)) {
261 A->claim();
262 // We can have a list of comma separated config names, e.g:
263 // '-analyzer-config key1=val1,key2=val2'
264 StringRef configList = A->getValue();
265 SmallVector<StringRef, 4> configVals;
266 configList.split(configVals, ",");
267 for (unsigned i = 0, e = configVals.size(); i != e; ++i) {
268 StringRef key, val;
269 std::tie(key, val) = configVals[i].split("=");
270 if (val.empty()) {
271 Diags.Report(SourceLocation(),
272 diag::err_analyzer_config_no_value) << configVals[i];
273 Success = false;
274 break;
275 }
276 if (val.find('=') != StringRef::npos) {
277 Diags.Report(SourceLocation(),
278 diag::err_analyzer_config_multiple_values)
279 << configVals[i];
280 Success = false;
281 break;
282 }
283 Opts.Config[key] = val;
284 }
285 }
286
287 return Success;
288 }
289
ParseMigratorArgs(MigratorOptions & Opts,ArgList & Args)290 static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
291 Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
292 Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
293 return true;
294 }
295
ParseCommentArgs(CommentOptions & Opts,ArgList & Args)296 static void ParseCommentArgs(CommentOptions &Opts, ArgList &Args) {
297 Opts.BlockCommandNames = Args.getAllArgValues(OPT_fcomment_block_commands);
298 Opts.ParseAllComments = Args.hasArg(OPT_fparse_all_comments);
299 }
300
getCodeModel(ArgList & Args,DiagnosticsEngine & Diags)301 static StringRef getCodeModel(ArgList &Args, DiagnosticsEngine &Diags) {
302 if (Arg *A = Args.getLastArg(OPT_mcode_model)) {
303 StringRef Value = A->getValue();
304 if (Value == "small" || Value == "kernel" || Value == "medium" ||
305 Value == "large")
306 return Value;
307 Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Value;
308 }
309 return "default";
310 }
311
312 /// \brief Create a new Regex instance out of the string value in \p RpassArg.
313 /// It returns a pointer to the newly generated Regex instance.
314 static std::shared_ptr<llvm::Regex>
GenerateOptimizationRemarkRegex(DiagnosticsEngine & Diags,ArgList & Args,Arg * RpassArg)315 GenerateOptimizationRemarkRegex(DiagnosticsEngine &Diags, ArgList &Args,
316 Arg *RpassArg) {
317 StringRef Val = RpassArg->getValue();
318 std::string RegexError;
319 std::shared_ptr<llvm::Regex> Pattern = std::make_shared<llvm::Regex>(Val);
320 if (!Pattern->isValid(RegexError)) {
321 Diags.Report(diag::err_drv_optimization_remark_pattern)
322 << RegexError << RpassArg->getAsString(Args);
323 Pattern.reset();
324 }
325 return Pattern;
326 }
327
parseDiagnosticLevelMask(StringRef FlagName,const std::vector<std::string> & Levels,DiagnosticsEngine * Diags,DiagnosticLevelMask & M)328 static bool parseDiagnosticLevelMask(StringRef FlagName,
329 const std::vector<std::string> &Levels,
330 DiagnosticsEngine *Diags,
331 DiagnosticLevelMask &M) {
332 bool Success = true;
333 for (const auto &Level : Levels) {
334 DiagnosticLevelMask const PM =
335 llvm::StringSwitch<DiagnosticLevelMask>(Level)
336 .Case("note", DiagnosticLevelMask::Note)
337 .Case("remark", DiagnosticLevelMask::Remark)
338 .Case("warning", DiagnosticLevelMask::Warning)
339 .Case("error", DiagnosticLevelMask::Error)
340 .Default(DiagnosticLevelMask::None);
341 if (PM == DiagnosticLevelMask::None) {
342 Success = false;
343 if (Diags)
344 Diags->Report(diag::err_drv_invalid_value) << FlagName << Level;
345 }
346 M = M | PM;
347 }
348 return Success;
349 }
350
parseSanitizerKinds(StringRef FlagName,const std::vector<std::string> & Sanitizers,DiagnosticsEngine & Diags,SanitizerSet & S)351 static void parseSanitizerKinds(StringRef FlagName,
352 const std::vector<std::string> &Sanitizers,
353 DiagnosticsEngine &Diags, SanitizerSet &S) {
354 for (const auto &Sanitizer : Sanitizers) {
355 SanitizerMask K = parseSanitizerValue(Sanitizer, /*AllowGroups=*/false);
356 if (K == 0)
357 Diags.Report(diag::err_drv_invalid_value) << FlagName << Sanitizer;
358 else
359 S.set(K, true);
360 }
361 }
362
ParseCodeGenArgs(CodeGenOptions & Opts,ArgList & Args,InputKind IK,DiagnosticsEngine & Diags,const TargetOptions & TargetOpts)363 static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
364 DiagnosticsEngine &Diags,
365 const TargetOptions &TargetOpts) {
366 using namespace options;
367 bool Success = true;
368 llvm::Triple Triple = llvm::Triple(TargetOpts.Triple);
369
370 unsigned OptimizationLevel = getOptimizationLevel(Args, IK, Diags);
371 // TODO: This could be done in Driver
372 unsigned MaxOptLevel = 3;
373 if (OptimizationLevel > MaxOptLevel) {
374 // If the optimization level is not supported, fall back on the default
375 // optimization
376 Diags.Report(diag::warn_drv_optimization_value)
377 << Args.getLastArg(OPT_O)->getAsString(Args) << "-O" << MaxOptLevel;
378 OptimizationLevel = MaxOptLevel;
379 }
380 Opts.OptimizationLevel = OptimizationLevel;
381
382 // We must always run at least the always inlining pass.
383 Opts.setInlining(
384 (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
385 : CodeGenOptions::OnlyAlwaysInlining);
386 // -fno-inline-functions overrides OptimizationLevel > 1.
387 Opts.NoInline = Args.hasArg(OPT_fno_inline);
388 Opts.setInlining(Args.hasArg(OPT_fno_inline_functions) ?
389 CodeGenOptions::OnlyAlwaysInlining : Opts.getInlining());
390
391 if (Arg *A = Args.getLastArg(OPT_fveclib)) {
392 StringRef Name = A->getValue();
393 if (Name == "Accelerate")
394 Opts.setVecLib(CodeGenOptions::Accelerate);
395 else if (Name == "none")
396 Opts.setVecLib(CodeGenOptions::NoLibrary);
397 else
398 Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
399 }
400
401 if (Arg *A = Args.getLastArg(OPT_debug_info_kind_EQ)) {
402 Opts.setDebugInfo(
403 llvm::StringSwitch<CodeGenOptions::DebugInfoKind>(A->getValue())
404 .Case("line-tables-only", CodeGenOptions::DebugLineTablesOnly)
405 .Case("limited", CodeGenOptions::LimitedDebugInfo)
406 .Case("standalone", CodeGenOptions::FullDebugInfo));
407 }
408 if (Arg *A = Args.getLastArg(OPT_debugger_tuning_EQ)) {
409 Opts.setDebuggerTuning(
410 llvm::StringSwitch<CodeGenOptions::DebuggerKind>(A->getValue())
411 .Case("gdb", CodeGenOptions::DebuggerKindGDB)
412 .Case("lldb", CodeGenOptions::DebuggerKindLLDB)
413 .Case("sce", CodeGenOptions::DebuggerKindSCE));
414 }
415 Opts.DwarfVersion = getLastArgIntValue(Args, OPT_dwarf_version_EQ, 0, Diags);
416 Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
417 Opts.EmitCodeView = Args.hasArg(OPT_gcodeview);
418 Opts.SplitDwarfFile = Args.getLastArgValue(OPT_split_dwarf_file);
419 Opts.DebugTypeExtRefs = Args.hasArg(OPT_dwarf_ext_refs);
420 if (Triple.isPS4CPU())
421 Opts.DebugExplicitImport = true;
422
423 for (const auto &Arg : Args.getAllArgValues(OPT_fdebug_prefix_map_EQ))
424 Opts.DebugPrefixMap.insert(StringRef(Arg).split('='));
425
426 if (const Arg *A =
427 Args.getLastArg(OPT_emit_llvm_uselists, OPT_no_emit_llvm_uselists))
428 Opts.EmitLLVMUseLists = A->getOption().getID() == OPT_emit_llvm_uselists;
429
430 Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
431 Opts.DisableLLVMPasses = Args.hasArg(OPT_disable_llvm_passes);
432 Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
433 Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
434 Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
435 OPT_fuse_register_sized_bitfield_access);
436 Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
437 Opts.StructPathTBAA = !Args.hasArg(OPT_no_struct_path_tbaa);
438 Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
439 Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
440 Opts.NoCommon = Args.hasArg(OPT_fno_common);
441 Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
442 Opts.OptimizeSize = getOptimizationLevelSize(Args);
443 Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
444 Args.hasArg(OPT_ffreestanding));
445 Opts.UnrollLoops =
446 Args.hasFlag(OPT_funroll_loops, OPT_fno_unroll_loops,
447 (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize));
448 Opts.RerollLoops = Args.hasArg(OPT_freroll_loops);
449
450 Opts.DisableIntegratedAS = Args.hasArg(OPT_fno_integrated_as);
451 Opts.Autolink = !Args.hasArg(OPT_fno_autolink);
452 Opts.SampleProfileFile = Args.getLastArgValue(OPT_fprofile_sample_use_EQ);
453 Opts.ProfileInstrGenerate = Args.hasArg(OPT_fprofile_instr_generate) ||
454 Args.hasArg(OPT_fprofile_instr_generate_EQ);
455 Opts.InstrProfileOutput = Args.getLastArgValue(OPT_fprofile_instr_generate_EQ);
456 Opts.InstrProfileInput = Args.getLastArgValue(OPT_fprofile_instr_use_EQ);
457 Opts.CoverageMapping =
458 Args.hasFlag(OPT_fcoverage_mapping, OPT_fno_coverage_mapping, false);
459 Opts.DumpCoverageMapping = Args.hasArg(OPT_dump_coverage_mapping);
460 Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
461 Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
462 Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
463 Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
464 Opts.CodeModel = getCodeModel(Args, Diags);
465 Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
466 Opts.DisableFPElim =
467 (Args.hasArg(OPT_mdisable_fp_elim) || Args.hasArg(OPT_pg));
468 Opts.DisableFree = Args.hasArg(OPT_disable_free);
469 Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
470 Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
471 if (Arg *A = Args.getLastArg(OPT_meabi)) {
472 StringRef Value = A->getValue();
473 llvm::EABI EABIVersion = llvm::StringSwitch<llvm::EABI>(Value)
474 .Case("default", llvm::EABI::Default)
475 .Case("4", llvm::EABI::EABI4)
476 .Case("5", llvm::EABI::EABI5)
477 .Case("gnu", llvm::EABI::GNU)
478 .Default(llvm::EABI::Unknown);
479 if (EABIVersion == llvm::EABI::Unknown)
480 Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
481 << Value;
482 else
483 Opts.EABIVersion = Value;
484 }
485 Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
486 Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
487 Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
488 Args.hasArg(OPT_cl_finite_math_only) ||
489 Args.hasArg(OPT_cl_fast_relaxed_math));
490 Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
491 Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
492 Args.hasArg(OPT_cl_finite_math_only) ||
493 Args.hasArg(OPT_cl_fast_relaxed_math));
494 Opts.NoSignedZeros = Args.hasArg(OPT_fno_signed_zeros);
495 Opts.ReciprocalMath = Args.hasArg(OPT_freciprocal_math);
496 Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
497 Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
498 Opts.NumRegisterParameters = getLastArgIntValue(Args, OPT_mregparm, 0, Diags);
499 Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
500 Opts.FatalWarnings = Args.hasArg(OPT_massembler_fatal_warnings);
501 Opts.EnableSegmentedStacks = Args.hasArg(OPT_split_stacks);
502 Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
503 Opts.IncrementalLinkerCompatible =
504 Args.hasArg(OPT_mincremental_linker_compatible);
505 Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
506 Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
507 Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
508 Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
509 Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
510 Opts.StrictVTablePointers = Args.hasArg(OPT_fstrict_vtable_pointers);
511 Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
512 Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
513 Args.hasArg(OPT_cl_fast_relaxed_math);
514 Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
515 Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
516 Opts.ThreadModel = Args.getLastArgValue(OPT_mthread_model, "posix");
517 if (Opts.ThreadModel != "posix" && Opts.ThreadModel != "single")
518 Diags.Report(diag::err_drv_invalid_value)
519 << Args.getLastArg(OPT_mthread_model)->getAsString(Args)
520 << Opts.ThreadModel;
521 Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
522 Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
523
524 Opts.FunctionSections = Args.hasFlag(OPT_ffunction_sections,
525 OPT_fno_function_sections, false);
526 Opts.DataSections = Args.hasFlag(OPT_fdata_sections,
527 OPT_fno_data_sections, false);
528 Opts.UniqueSectionNames = Args.hasFlag(OPT_funique_section_names,
529 OPT_fno_unique_section_names, true);
530
531 Opts.MergeFunctions = Args.hasArg(OPT_fmerge_functions);
532
533 Opts.PrepareForLTO = Args.hasArg(OPT_flto, OPT_flto_EQ);
534 const Arg *A = Args.getLastArg(OPT_flto, OPT_flto_EQ);
535 Opts.EmitFunctionSummary = A && A->containsValue("thin");
536 if (Arg *A = Args.getLastArg(OPT_fthinlto_index_EQ)) {
537 if (IK != IK_LLVM_IR)
538 Diags.Report(diag::err_drv_argument_only_allowed_with)
539 << A->getAsString(Args) << "-x ir";
540 Opts.ThinLTOIndexFile = Args.getLastArgValue(OPT_fthinlto_index_EQ);
541 }
542
543 Opts.MSVolatile = Args.hasArg(OPT_fms_volatile);
544
545 Opts.VectorizeBB = Args.hasArg(OPT_vectorize_slp_aggressive);
546 Opts.VectorizeLoop = Args.hasArg(OPT_vectorize_loops);
547 Opts.VectorizeSLP = Args.hasArg(OPT_vectorize_slp);
548
549 Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
550 Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
551
552 Opts.DisableGCov = Args.hasArg(OPT_test_coverage);
553 Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
554 Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
555 if (Opts.EmitGcovArcs || Opts.EmitGcovNotes) {
556 Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
557 Opts.CoverageExtraChecksum = Args.hasArg(OPT_coverage_cfg_checksum);
558 Opts.CoverageNoFunctionNamesInData =
559 Args.hasArg(OPT_coverage_no_function_names_in_data);
560 Opts.CoverageExitBlockBeforeBody =
561 Args.hasArg(OPT_coverage_exit_block_before_body);
562 if (Args.hasArg(OPT_coverage_version_EQ)) {
563 StringRef CoverageVersion = Args.getLastArgValue(OPT_coverage_version_EQ);
564 if (CoverageVersion.size() != 4) {
565 Diags.Report(diag::err_drv_invalid_value)
566 << Args.getLastArg(OPT_coverage_version_EQ)->getAsString(Args)
567 << CoverageVersion;
568 } else {
569 memcpy(Opts.CoverageVersion, CoverageVersion.data(), 4);
570 }
571 }
572 }
573
574 Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
575 Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
576 Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
577 Opts.CompressDebugSections = Args.hasArg(OPT_compress_debug_sections);
578 Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
579 for (auto A : Args.filtered(OPT_mlink_bitcode_file, OPT_mlink_cuda_bitcode)) {
580 unsigned LinkFlags = llvm::Linker::Flags::None;
581 if (A->getOption().matches(OPT_mlink_cuda_bitcode))
582 LinkFlags = llvm::Linker::Flags::LinkOnlyNeeded |
583 llvm::Linker::Flags::InternalizeLinkedSymbols;
584 Opts.LinkBitcodeFiles.push_back(std::make_pair(LinkFlags, A->getValue()));
585 }
586 Opts.SanitizeCoverageType =
587 getLastArgIntValue(Args, OPT_fsanitize_coverage_type, 0, Diags);
588 Opts.SanitizeCoverageIndirectCalls =
589 Args.hasArg(OPT_fsanitize_coverage_indirect_calls);
590 Opts.SanitizeCoverageTraceBB = Args.hasArg(OPT_fsanitize_coverage_trace_bb);
591 Opts.SanitizeCoverageTraceCmp = Args.hasArg(OPT_fsanitize_coverage_trace_cmp);
592 Opts.SanitizeCoverage8bitCounters =
593 Args.hasArg(OPT_fsanitize_coverage_8bit_counters);
594 Opts.SanitizeMemoryTrackOrigins =
595 getLastArgIntValue(Args, OPT_fsanitize_memory_track_origins_EQ, 0, Diags);
596 Opts.SanitizeMemoryUseAfterDtor =
597 Args.hasArg(OPT_fsanitize_memory_use_after_dtor);
598 Opts.SanitizeCfiCrossDso = Args.hasArg(OPT_fsanitize_cfi_cross_dso);
599 Opts.SSPBufferSize =
600 getLastArgIntValue(Args, OPT_stack_protector_buffer_size, 8, Diags);
601 Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
602 if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
603 StringRef Val = A->getValue();
604 unsigned StackAlignment = Opts.StackAlignment;
605 Val.getAsInteger(10, StackAlignment);
606 Opts.StackAlignment = StackAlignment;
607 }
608
609 if (Arg *A = Args.getLastArg(OPT_mstack_probe_size)) {
610 StringRef Val = A->getValue();
611 unsigned StackProbeSize = Opts.StackProbeSize;
612 Val.getAsInteger(0, StackProbeSize);
613 Opts.StackProbeSize = StackProbeSize;
614 }
615
616 if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
617 StringRef Name = A->getValue();
618 unsigned Method = llvm::StringSwitch<unsigned>(Name)
619 .Case("legacy", CodeGenOptions::Legacy)
620 .Case("non-legacy", CodeGenOptions::NonLegacy)
621 .Case("mixed", CodeGenOptions::Mixed)
622 .Default(~0U);
623 if (Method == ~0U) {
624 Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
625 Success = false;
626 } else {
627 Opts.setObjCDispatchMethod(
628 static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
629 }
630 }
631
632 Opts.EmulatedTLS =
633 Args.hasFlag(OPT_femulated_tls, OPT_fno_emulated_tls, false);
634
635 if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
636 StringRef Name = A->getValue();
637 unsigned Model = llvm::StringSwitch<unsigned>(Name)
638 .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
639 .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
640 .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
641 .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
642 .Default(~0U);
643 if (Model == ~0U) {
644 Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
645 Success = false;
646 } else {
647 Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
648 }
649 }
650
651 if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
652 StringRef Val = A->getValue();
653 if (Val == "fast")
654 Opts.setFPContractMode(CodeGenOptions::FPC_Fast);
655 else if (Val == "on")
656 Opts.setFPContractMode(CodeGenOptions::FPC_On);
657 else if (Val == "off")
658 Opts.setFPContractMode(CodeGenOptions::FPC_Off);
659 else
660 Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
661 }
662
663 if (Arg *A = Args.getLastArg(OPT_fpcc_struct_return, OPT_freg_struct_return)) {
664 if (A->getOption().matches(OPT_fpcc_struct_return)) {
665 Opts.setStructReturnConvention(CodeGenOptions::SRCK_OnStack);
666 } else {
667 assert(A->getOption().matches(OPT_freg_struct_return));
668 Opts.setStructReturnConvention(CodeGenOptions::SRCK_InRegs);
669 }
670 }
671
672 Opts.DependentLibraries = Args.getAllArgValues(OPT_dependent_lib);
673 bool NeedLocTracking = false;
674
675 if (Arg *A = Args.getLastArg(OPT_Rpass_EQ)) {
676 Opts.OptimizationRemarkPattern =
677 GenerateOptimizationRemarkRegex(Diags, Args, A);
678 NeedLocTracking = true;
679 }
680
681 if (Arg *A = Args.getLastArg(OPT_Rpass_missed_EQ)) {
682 Opts.OptimizationRemarkMissedPattern =
683 GenerateOptimizationRemarkRegex(Diags, Args, A);
684 NeedLocTracking = true;
685 }
686
687 if (Arg *A = Args.getLastArg(OPT_Rpass_analysis_EQ)) {
688 Opts.OptimizationRemarkAnalysisPattern =
689 GenerateOptimizationRemarkRegex(Diags, Args, A);
690 NeedLocTracking = true;
691 }
692
693 // If the user requested to use a sample profile for PGO, then the
694 // backend will need to track source location information so the profile
695 // can be incorporated into the IR.
696 if (!Opts.SampleProfileFile.empty())
697 NeedLocTracking = true;
698
699 // If the user requested a flag that requires source locations available in
700 // the backend, make sure that the backend tracks source location information.
701 if (NeedLocTracking && Opts.getDebugInfo() == CodeGenOptions::NoDebugInfo)
702 Opts.setDebugInfo(CodeGenOptions::LocTrackingOnly);
703
704 Opts.RewriteMapFiles = Args.getAllArgValues(OPT_frewrite_map_file);
705
706 // Parse -fsanitize-recover= arguments.
707 // FIXME: Report unrecoverable sanitizers incorrectly specified here.
708 parseSanitizerKinds("-fsanitize-recover=",
709 Args.getAllArgValues(OPT_fsanitize_recover_EQ), Diags,
710 Opts.SanitizeRecover);
711 parseSanitizerKinds("-fsanitize-trap=",
712 Args.getAllArgValues(OPT_fsanitize_trap_EQ), Diags,
713 Opts.SanitizeTrap);
714
715 Opts.CudaGpuBinaryFileNames =
716 Args.getAllArgValues(OPT_fcuda_include_gpubinary);
717
718 return Success;
719 }
720
ParseDependencyOutputArgs(DependencyOutputOptions & Opts,ArgList & Args)721 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
722 ArgList &Args) {
723 using namespace options;
724 Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
725 Opts.Targets = Args.getAllArgValues(OPT_MT);
726 Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
727 Opts.IncludeModuleFiles = Args.hasArg(OPT_module_file_deps);
728 Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
729 Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
730 Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
731 Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
732 Opts.PrintShowIncludes = Args.hasArg(OPT_show_includes);
733 Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
734 Opts.ModuleDependencyOutputDir =
735 Args.getLastArgValue(OPT_module_dependency_dir);
736 if (Args.hasArg(OPT_MV))
737 Opts.OutputFormat = DependencyOutputFormat::NMake;
738 // Add sanitizer blacklists as extra dependencies.
739 // They won't be discovered by the regular preprocessor, so
740 // we let make / ninja to know about this implicit dependency.
741 Opts.ExtraDeps = Args.getAllArgValues(OPT_fdepfile_entry);
742 auto ModuleFiles = Args.getAllArgValues(OPT_fmodule_file);
743 Opts.ExtraDeps.insert(Opts.ExtraDeps.end(), ModuleFiles.begin(),
744 ModuleFiles.end());
745 }
746
ParseDiagnosticArgs(DiagnosticOptions & Opts,ArgList & Args,DiagnosticsEngine * Diags)747 bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
748 DiagnosticsEngine *Diags) {
749 using namespace options;
750 bool Success = true;
751
752 Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
753 if (Arg *A =
754 Args.getLastArg(OPT_diagnostic_serialized_file, OPT__serialize_diags))
755 Opts.DiagnosticSerializationFile = A->getValue();
756 Opts.IgnoreWarnings = Args.hasArg(OPT_w);
757 Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
758 Opts.Pedantic = Args.hasArg(OPT_pedantic);
759 Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
760 Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
761 Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
762 Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
763 OPT_fno_show_column,
764 /*Default=*/true);
765 Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
766 Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
767 Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
768
769 llvm::sys::Process::UseANSIEscapeCodes(Args.hasArg(OPT_fansi_escape_codes));
770
771 // Default behavior is to not to show note include stacks.
772 Opts.ShowNoteIncludeStack = false;
773 if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
774 OPT_fno_diagnostics_show_note_include_stack))
775 if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
776 Opts.ShowNoteIncludeStack = true;
777
778 StringRef ShowOverloads =
779 Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
780 if (ShowOverloads == "best")
781 Opts.setShowOverloads(Ovl_Best);
782 else if (ShowOverloads == "all")
783 Opts.setShowOverloads(Ovl_All);
784 else {
785 Success = false;
786 if (Diags)
787 Diags->Report(diag::err_drv_invalid_value)
788 << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
789 << ShowOverloads;
790 }
791
792 StringRef ShowCategory =
793 Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
794 if (ShowCategory == "none")
795 Opts.ShowCategories = 0;
796 else if (ShowCategory == "id")
797 Opts.ShowCategories = 1;
798 else if (ShowCategory == "name")
799 Opts.ShowCategories = 2;
800 else {
801 Success = false;
802 if (Diags)
803 Diags->Report(diag::err_drv_invalid_value)
804 << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
805 << ShowCategory;
806 }
807
808 StringRef Format =
809 Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
810 if (Format == "clang")
811 Opts.setFormat(DiagnosticOptions::Clang);
812 else if (Format == "msvc")
813 Opts.setFormat(DiagnosticOptions::MSVC);
814 else if (Format == "msvc-fallback") {
815 Opts.setFormat(DiagnosticOptions::MSVC);
816 Opts.CLFallbackMode = true;
817 } else if (Format == "vi")
818 Opts.setFormat(DiagnosticOptions::Vi);
819 else {
820 Success = false;
821 if (Diags)
822 Diags->Report(diag::err_drv_invalid_value)
823 << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
824 << Format;
825 }
826
827 Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
828 Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
829 Opts.ShowPresumedLoc = !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
830 Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
831 DiagnosticLevelMask DiagMask = DiagnosticLevelMask::None;
832 Success &= parseDiagnosticLevelMask("-verify-ignore-unexpected=",
833 Args.getAllArgValues(OPT_verify_ignore_unexpected_EQ),
834 Diags, DiagMask);
835 if (Args.hasArg(OPT_verify_ignore_unexpected))
836 DiagMask = DiagnosticLevelMask::All;
837 Opts.setVerifyIgnoreUnexpected(DiagMask);
838 Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
839 Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
840 Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
841 Opts.MacroBacktraceLimit =
842 getLastArgIntValue(Args, OPT_fmacro_backtrace_limit,
843 DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
844 Opts.TemplateBacktraceLimit = getLastArgIntValue(
845 Args, OPT_ftemplate_backtrace_limit,
846 DiagnosticOptions::DefaultTemplateBacktraceLimit, Diags);
847 Opts.ConstexprBacktraceLimit = getLastArgIntValue(
848 Args, OPT_fconstexpr_backtrace_limit,
849 DiagnosticOptions::DefaultConstexprBacktraceLimit, Diags);
850 Opts.SpellCheckingLimit = getLastArgIntValue(
851 Args, OPT_fspell_checking_limit,
852 DiagnosticOptions::DefaultSpellCheckingLimit, Diags);
853 Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
854 DiagnosticOptions::DefaultTabStop, Diags);
855 if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
856 Opts.TabStop = DiagnosticOptions::DefaultTabStop;
857 if (Diags)
858 Diags->Report(diag::warn_ignoring_ftabstop_value)
859 << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
860 }
861 Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
862 addDiagnosticArgs(Args, OPT_W_Group, OPT_W_value_Group, Opts.Warnings);
863 addDiagnosticArgs(Args, OPT_R_Group, OPT_R_value_Group, Opts.Remarks);
864
865 return Success;
866 }
867
ParseFileSystemArgs(FileSystemOptions & Opts,ArgList & Args)868 static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
869 Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
870 }
871
872 /// Parse the argument to the -ftest-module-file-extension
873 /// command-line argument.
874 ///
875 /// \returns true on error, false on success.
parseTestModuleFileExtensionArg(StringRef Arg,std::string & BlockName,unsigned & MajorVersion,unsigned & MinorVersion,bool & Hashed,std::string & UserInfo)876 static bool parseTestModuleFileExtensionArg(StringRef Arg,
877 std::string &BlockName,
878 unsigned &MajorVersion,
879 unsigned &MinorVersion,
880 bool &Hashed,
881 std::string &UserInfo) {
882 SmallVector<StringRef, 5> Args;
883 Arg.split(Args, ':', 5);
884 if (Args.size() < 5)
885 return true;
886
887 BlockName = Args[0];
888 if (Args[1].getAsInteger(10, MajorVersion)) return true;
889 if (Args[2].getAsInteger(10, MinorVersion)) return true;
890 if (Args[3].getAsInteger(2, Hashed)) return true;
891 if (Args.size() > 4)
892 UserInfo = Args[4];
893 return false;
894 }
895
ParseFrontendArgs(FrontendOptions & Opts,ArgList & Args,DiagnosticsEngine & Diags)896 static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
897 DiagnosticsEngine &Diags) {
898 using namespace options;
899 Opts.ProgramAction = frontend::ParseSyntaxOnly;
900 if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
901 switch (A->getOption().getID()) {
902 default:
903 llvm_unreachable("Invalid option in group!");
904 case OPT_ast_list:
905 Opts.ProgramAction = frontend::ASTDeclList; break;
906 case OPT_ast_dump:
907 case OPT_ast_dump_lookups:
908 Opts.ProgramAction = frontend::ASTDump; break;
909 case OPT_ast_print:
910 Opts.ProgramAction = frontend::ASTPrint; break;
911 case OPT_ast_view:
912 Opts.ProgramAction = frontend::ASTView; break;
913 case OPT_dump_raw_tokens:
914 Opts.ProgramAction = frontend::DumpRawTokens; break;
915 case OPT_dump_tokens:
916 Opts.ProgramAction = frontend::DumpTokens; break;
917 case OPT_S:
918 Opts.ProgramAction = frontend::EmitAssembly; break;
919 case OPT_emit_llvm_bc:
920 Opts.ProgramAction = frontend::EmitBC; break;
921 case OPT_emit_html:
922 Opts.ProgramAction = frontend::EmitHTML; break;
923 case OPT_emit_llvm:
924 Opts.ProgramAction = frontend::EmitLLVM; break;
925 case OPT_emit_llvm_only:
926 Opts.ProgramAction = frontend::EmitLLVMOnly; break;
927 case OPT_emit_codegen_only:
928 Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
929 case OPT_emit_obj:
930 Opts.ProgramAction = frontend::EmitObj; break;
931 case OPT_fixit_EQ:
932 Opts.FixItSuffix = A->getValue();
933 // fall-through!
934 case OPT_fixit:
935 Opts.ProgramAction = frontend::FixIt; break;
936 case OPT_emit_module:
937 Opts.ProgramAction = frontend::GenerateModule; break;
938 case OPT_emit_pch:
939 Opts.ProgramAction = frontend::GeneratePCH; break;
940 case OPT_emit_pth:
941 Opts.ProgramAction = frontend::GeneratePTH; break;
942 case OPT_init_only:
943 Opts.ProgramAction = frontend::InitOnly; break;
944 case OPT_fsyntax_only:
945 Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
946 case OPT_module_file_info:
947 Opts.ProgramAction = frontend::ModuleFileInfo; break;
948 case OPT_verify_pch:
949 Opts.ProgramAction = frontend::VerifyPCH; break;
950 case OPT_print_decl_contexts:
951 Opts.ProgramAction = frontend::PrintDeclContext; break;
952 case OPT_print_preamble:
953 Opts.ProgramAction = frontend::PrintPreamble; break;
954 case OPT_E:
955 Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
956 case OPT_rewrite_macros:
957 Opts.ProgramAction = frontend::RewriteMacros; break;
958 case OPT_rewrite_objc:
959 Opts.ProgramAction = frontend::RewriteObjC; break;
960 case OPT_rewrite_test:
961 Opts.ProgramAction = frontend::RewriteTest; break;
962 case OPT_analyze:
963 Opts.ProgramAction = frontend::RunAnalysis; break;
964 case OPT_migrate:
965 Opts.ProgramAction = frontend::MigrateSource; break;
966 case OPT_Eonly:
967 Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
968 }
969 }
970
971 if (const Arg* A = Args.getLastArg(OPT_plugin)) {
972 Opts.Plugins.emplace_back(A->getValue(0));
973 Opts.ProgramAction = frontend::PluginAction;
974 Opts.ActionName = A->getValue();
975
976 for (const Arg *AA : Args.filtered(OPT_plugin_arg))
977 if (AA->getValue(0) == Opts.ActionName)
978 Opts.PluginArgs.emplace_back(AA->getValue(1));
979 }
980
981 Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
982 Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
983 for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i)
984 for (const Arg *A : Args.filtered(OPT_plugin_arg))
985 if (A->getValue(0) == Opts.AddPluginActions[i])
986 Opts.AddPluginArgs[i].emplace_back(A->getValue(1));
987
988 for (const std::string &Arg :
989 Args.getAllArgValues(OPT_ftest_module_file_extension_EQ)) {
990 std::string BlockName;
991 unsigned MajorVersion;
992 unsigned MinorVersion;
993 bool Hashed;
994 std::string UserInfo;
995 if (parseTestModuleFileExtensionArg(Arg, BlockName, MajorVersion,
996 MinorVersion, Hashed, UserInfo)) {
997 Diags.Report(diag::err_test_module_file_extension_format) << Arg;
998
999 continue;
1000 }
1001
1002 // Add the testing module file extension.
1003 Opts.ModuleFileExtensions.push_back(
1004 new TestModuleFileExtension(BlockName, MajorVersion, MinorVersion,
1005 Hashed, UserInfo));
1006 }
1007
1008 if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
1009 Opts.CodeCompletionAt =
1010 ParsedSourceLocation::FromString(A->getValue());
1011 if (Opts.CodeCompletionAt.FileName.empty())
1012 Diags.Report(diag::err_drv_invalid_value)
1013 << A->getAsString(Args) << A->getValue();
1014 }
1015 Opts.DisableFree = Args.hasArg(OPT_disable_free);
1016
1017 Opts.OutputFile = Args.getLastArgValue(OPT_o);
1018 Opts.Plugins = Args.getAllArgValues(OPT_load);
1019 Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
1020 Opts.ShowHelp = Args.hasArg(OPT_help);
1021 Opts.ShowStats = Args.hasArg(OPT_print_stats);
1022 Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
1023 Opts.ShowVersion = Args.hasArg(OPT_version);
1024 Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
1025 Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
1026 Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
1027 Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
1028 Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
1029 Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
1030 Opts.ASTDumpDecls = Args.hasArg(OPT_ast_dump);
1031 Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
1032 Opts.ASTDumpLookups = Args.hasArg(OPT_ast_dump_lookups);
1033 Opts.UseGlobalModuleIndex = !Args.hasArg(OPT_fno_modules_global_index);
1034 Opts.GenerateGlobalModuleIndex = Opts.UseGlobalModuleIndex;
1035 Opts.ModuleMapFiles = Args.getAllArgValues(OPT_fmodule_map_file);
1036 Opts.ModuleFiles = Args.getAllArgValues(OPT_fmodule_file);
1037 Opts.ModulesEmbedFiles = Args.getAllArgValues(OPT_fmodules_embed_file_EQ);
1038 Opts.ModulesEmbedAllFiles = Args.hasArg(OPT_fmodules_embed_all_files);
1039
1040 Opts.CodeCompleteOpts.IncludeMacros
1041 = Args.hasArg(OPT_code_completion_macros);
1042 Opts.CodeCompleteOpts.IncludeCodePatterns
1043 = Args.hasArg(OPT_code_completion_patterns);
1044 Opts.CodeCompleteOpts.IncludeGlobals
1045 = !Args.hasArg(OPT_no_code_completion_globals);
1046 Opts.CodeCompleteOpts.IncludeBriefComments
1047 = Args.hasArg(OPT_code_completion_brief_comments);
1048
1049 Opts.OverrideRecordLayoutsFile
1050 = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
1051 Opts.AuxTriple =
1052 llvm::Triple::normalize(Args.getLastArgValue(OPT_aux_triple));
1053
1054 if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
1055 OPT_arcmt_modify,
1056 OPT_arcmt_migrate)) {
1057 switch (A->getOption().getID()) {
1058 default:
1059 llvm_unreachable("missed a case");
1060 case OPT_arcmt_check:
1061 Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
1062 break;
1063 case OPT_arcmt_modify:
1064 Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
1065 break;
1066 case OPT_arcmt_migrate:
1067 Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
1068 break;
1069 }
1070 }
1071 Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
1072 Opts.ARCMTMigrateReportOut
1073 = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
1074 Opts.ARCMTMigrateEmitARCErrors
1075 = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
1076
1077 if (Args.hasArg(OPT_objcmt_migrate_literals))
1078 Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
1079 if (Args.hasArg(OPT_objcmt_migrate_subscripting))
1080 Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
1081 if (Args.hasArg(OPT_objcmt_migrate_property_dot_syntax))
1082 Opts.ObjCMTAction |= FrontendOptions::ObjCMT_PropertyDotSyntax;
1083 if (Args.hasArg(OPT_objcmt_migrate_property))
1084 Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Property;
1085 if (Args.hasArg(OPT_objcmt_migrate_readonly_property))
1086 Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadonlyProperty;
1087 if (Args.hasArg(OPT_objcmt_migrate_readwrite_property))
1088 Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadwriteProperty;
1089 if (Args.hasArg(OPT_objcmt_migrate_annotation))
1090 Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Annotation;
1091 if (Args.hasArg(OPT_objcmt_returns_innerpointer_property))
1092 Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReturnsInnerPointerProperty;
1093 if (Args.hasArg(OPT_objcmt_migrate_instancetype))
1094 Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Instancetype;
1095 if (Args.hasArg(OPT_objcmt_migrate_nsmacros))
1096 Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsMacros;
1097 if (Args.hasArg(OPT_objcmt_migrate_protocol_conformance))
1098 Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ProtocolConformance;
1099 if (Args.hasArg(OPT_objcmt_atomic_property))
1100 Opts.ObjCMTAction |= FrontendOptions::ObjCMT_AtomicProperty;
1101 if (Args.hasArg(OPT_objcmt_ns_nonatomic_iosonly))
1102 Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsAtomicIOSOnlyProperty;
1103 if (Args.hasArg(OPT_objcmt_migrate_designated_init))
1104 Opts.ObjCMTAction |= FrontendOptions::ObjCMT_DesignatedInitializer;
1105 if (Args.hasArg(OPT_objcmt_migrate_all))
1106 Opts.ObjCMTAction |= FrontendOptions::ObjCMT_MigrateDecls;
1107
1108 Opts.ObjCMTWhiteListPath = Args.getLastArgValue(OPT_objcmt_whitelist_dir_path);
1109
1110 if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
1111 Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
1112 Diags.Report(diag::err_drv_argument_not_allowed_with)
1113 << "ARC migration" << "ObjC migration";
1114 }
1115
1116 InputKind DashX = IK_None;
1117 if (const Arg *A = Args.getLastArg(OPT_x)) {
1118 DashX = llvm::StringSwitch<InputKind>(A->getValue())
1119 .Case("c", IK_C)
1120 .Case("cl", IK_OpenCL)
1121 .Case("cuda", IK_CUDA)
1122 .Case("c++", IK_CXX)
1123 .Case("objective-c", IK_ObjC)
1124 .Case("objective-c++", IK_ObjCXX)
1125 .Case("cpp-output", IK_PreprocessedC)
1126 .Case("assembler-with-cpp", IK_Asm)
1127 .Case("c++-cpp-output", IK_PreprocessedCXX)
1128 .Case("cuda-cpp-output", IK_PreprocessedCuda)
1129 .Case("objective-c-cpp-output", IK_PreprocessedObjC)
1130 .Case("objc-cpp-output", IK_PreprocessedObjC)
1131 .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
1132 .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
1133 .Case("c-header", IK_C)
1134 .Case("cl-header", IK_OpenCL)
1135 .Case("objective-c-header", IK_ObjC)
1136 .Case("c++-header", IK_CXX)
1137 .Case("objective-c++-header", IK_ObjCXX)
1138 .Cases("ast", "pcm", IK_AST)
1139 .Case("ir", IK_LLVM_IR)
1140 .Default(IK_None);
1141 if (DashX == IK_None)
1142 Diags.Report(diag::err_drv_invalid_value)
1143 << A->getAsString(Args) << A->getValue();
1144 }
1145
1146 // '-' is the default input if none is given.
1147 std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
1148 Opts.Inputs.clear();
1149 if (Inputs.empty())
1150 Inputs.push_back("-");
1151 for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1152 InputKind IK = DashX;
1153 if (IK == IK_None) {
1154 IK = FrontendOptions::getInputKindForExtension(
1155 StringRef(Inputs[i]).rsplit('.').second);
1156 // FIXME: Remove this hack.
1157 if (i == 0)
1158 DashX = IK;
1159 }
1160 Opts.Inputs.emplace_back(std::move(Inputs[i]), IK);
1161 }
1162
1163 return DashX;
1164 }
1165
GetResourcesPath(const char * Argv0,void * MainAddr)1166 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1167 void *MainAddr) {
1168 std::string ClangExecutable =
1169 llvm::sys::fs::getMainExecutable(Argv0, MainAddr);
1170 StringRef Dir = llvm::sys::path::parent_path(ClangExecutable);
1171
1172 // Compute the path to the resource directory.
1173 StringRef ClangResourceDir(CLANG_RESOURCE_DIR);
1174 SmallString<128> P(Dir);
1175 if (ClangResourceDir != "")
1176 llvm::sys::path::append(P, ClangResourceDir);
1177 else
1178 llvm::sys::path::append(P, "..", Twine("lib") + CLANG_LIBDIR_SUFFIX,
1179 "clang", CLANG_VERSION_STRING);
1180
1181 return P.str();
1182 }
1183
ParseHeaderSearchArgs(HeaderSearchOptions & Opts,ArgList & Args)1184 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1185 using namespace options;
1186 Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
1187 Opts.Verbose = Args.hasArg(OPT_v);
1188 Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1189 Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
1190 Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1191 if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
1192 Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
1193 Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
1194 Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodules_cache_path);
1195 Opts.ModuleUserBuildPath = Args.getLastArgValue(OPT_fmodules_user_build_path);
1196 Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
1197 Opts.ImplicitModuleMaps = Args.hasArg(OPT_fimplicit_module_maps);
1198 Opts.ModuleMapFileHomeIsCwd = Args.hasArg(OPT_fmodule_map_file_home_is_cwd);
1199 Opts.ModuleCachePruneInterval =
1200 getLastArgIntValue(Args, OPT_fmodules_prune_interval, 7 * 24 * 60 * 60);
1201 Opts.ModuleCachePruneAfter =
1202 getLastArgIntValue(Args, OPT_fmodules_prune_after, 31 * 24 * 60 * 60);
1203 Opts.ModulesValidateOncePerBuildSession =
1204 Args.hasArg(OPT_fmodules_validate_once_per_build_session);
1205 Opts.BuildSessionTimestamp =
1206 getLastArgUInt64Value(Args, OPT_fbuild_session_timestamp, 0);
1207 Opts.ModulesValidateSystemHeaders =
1208 Args.hasArg(OPT_fmodules_validate_system_headers);
1209 if (const Arg *A = Args.getLastArg(OPT_fmodule_format_EQ))
1210 Opts.ModuleFormat = A->getValue();
1211
1212 for (const Arg *A : Args.filtered(OPT_fmodules_ignore_macro)) {
1213 StringRef MacroDef = A->getValue();
1214 Opts.ModulesIgnoreMacros.insert(MacroDef.split('=').first);
1215 }
1216
1217 // Add -I..., -F..., and -index-header-map options in order.
1218 bool IsIndexHeaderMap = false;
1219 for (const Arg *A : Args.filtered(OPT_I, OPT_F, OPT_index_header_map)) {
1220 if (A->getOption().matches(OPT_index_header_map)) {
1221 // -index-header-map applies to the next -I or -F.
1222 IsIndexHeaderMap = true;
1223 continue;
1224 }
1225
1226 frontend::IncludeDirGroup Group =
1227 IsIndexHeaderMap ? frontend::IndexHeaderMap : frontend::Angled;
1228
1229 Opts.AddPath(A->getValue(), Group,
1230 /*IsFramework=*/A->getOption().matches(OPT_F), true);
1231 IsIndexHeaderMap = false;
1232 }
1233
1234 // Add -iprefix/-iwithprefix/-iwithprefixbefore options.
1235 StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1236 for (const Arg *A :
1237 Args.filtered(OPT_iprefix, OPT_iwithprefix, OPT_iwithprefixbefore)) {
1238 if (A->getOption().matches(OPT_iprefix))
1239 Prefix = A->getValue();
1240 else if (A->getOption().matches(OPT_iwithprefix))
1241 Opts.AddPath(Prefix.str() + A->getValue(), frontend::After, false, true);
1242 else
1243 Opts.AddPath(Prefix.str() + A->getValue(), frontend::Angled, false, true);
1244 }
1245
1246 for (const Arg *A : Args.filtered(OPT_idirafter))
1247 Opts.AddPath(A->getValue(), frontend::After, false, true);
1248 for (const Arg *A : Args.filtered(OPT_iquote))
1249 Opts.AddPath(A->getValue(), frontend::Quoted, false, true);
1250 for (const Arg *A : Args.filtered(OPT_isystem, OPT_iwithsysroot))
1251 Opts.AddPath(A->getValue(), frontend::System, false,
1252 !A->getOption().matches(OPT_iwithsysroot));
1253 for (const Arg *A : Args.filtered(OPT_iframework))
1254 Opts.AddPath(A->getValue(), frontend::System, true, true);
1255
1256 // Add the paths for the various language specific isystem flags.
1257 for (const Arg *A : Args.filtered(OPT_c_isystem))
1258 Opts.AddPath(A->getValue(), frontend::CSystem, false, true);
1259 for (const Arg *A : Args.filtered(OPT_cxx_isystem))
1260 Opts.AddPath(A->getValue(), frontend::CXXSystem, false, true);
1261 for (const Arg *A : Args.filtered(OPT_objc_isystem))
1262 Opts.AddPath(A->getValue(), frontend::ObjCSystem, false,true);
1263 for (const Arg *A : Args.filtered(OPT_objcxx_isystem))
1264 Opts.AddPath(A->getValue(), frontend::ObjCXXSystem, false, true);
1265
1266 // Add the internal paths from a driver that detects standard include paths.
1267 for (const Arg *A :
1268 Args.filtered(OPT_internal_isystem, OPT_internal_externc_isystem)) {
1269 frontend::IncludeDirGroup Group = frontend::System;
1270 if (A->getOption().matches(OPT_internal_externc_isystem))
1271 Group = frontend::ExternCSystem;
1272 Opts.AddPath(A->getValue(), Group, false, true);
1273 }
1274
1275 // Add the path prefixes which are implicitly treated as being system headers.
1276 for (const Arg *A :
1277 Args.filtered(OPT_system_header_prefix, OPT_no_system_header_prefix))
1278 Opts.AddSystemHeaderPrefix(
1279 A->getValue(), A->getOption().matches(OPT_system_header_prefix));
1280
1281 for (const Arg *A : Args.filtered(OPT_ivfsoverlay))
1282 Opts.AddVFSOverlayFile(A->getValue());
1283 }
1284
setLangDefaults(LangOptions & Opts,InputKind IK,LangStandard::Kind LangStd)1285 void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
1286 LangStandard::Kind LangStd) {
1287 // Set some properties which depend solely on the input kind; it would be nice
1288 // to move these to the language standard, and have the driver resolve the
1289 // input kind + language standard.
1290 if (IK == IK_Asm) {
1291 Opts.AsmPreprocessor = 1;
1292 } else if (IK == IK_ObjC ||
1293 IK == IK_ObjCXX ||
1294 IK == IK_PreprocessedObjC ||
1295 IK == IK_PreprocessedObjCXX) {
1296 Opts.ObjC1 = Opts.ObjC2 = 1;
1297 }
1298
1299 if (LangStd == LangStandard::lang_unspecified) {
1300 // Based on the base language, pick one.
1301 switch (IK) {
1302 case IK_None:
1303 case IK_AST:
1304 case IK_LLVM_IR:
1305 llvm_unreachable("Invalid input kind!");
1306 case IK_OpenCL:
1307 LangStd = LangStandard::lang_opencl;
1308 break;
1309 case IK_CUDA:
1310 case IK_PreprocessedCuda:
1311 LangStd = LangStandard::lang_cuda;
1312 break;
1313 case IK_Asm:
1314 case IK_C:
1315 case IK_PreprocessedC:
1316 case IK_ObjC:
1317 case IK_PreprocessedObjC:
1318 LangStd = LangStandard::lang_gnu11;
1319 break;
1320 case IK_CXX:
1321 case IK_PreprocessedCXX:
1322 case IK_ObjCXX:
1323 case IK_PreprocessedObjCXX:
1324 LangStd = LangStandard::lang_gnucxx98;
1325 break;
1326 }
1327 }
1328
1329 const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1330 Opts.LineComment = Std.hasLineComments();
1331 Opts.C99 = Std.isC99();
1332 Opts.C11 = Std.isC11();
1333 Opts.CPlusPlus = Std.isCPlusPlus();
1334 Opts.CPlusPlus11 = Std.isCPlusPlus11();
1335 Opts.CPlusPlus14 = Std.isCPlusPlus14();
1336 Opts.CPlusPlus1z = Std.isCPlusPlus1z();
1337 Opts.Digraphs = Std.hasDigraphs();
1338 Opts.GNUMode = Std.isGNUMode();
1339 Opts.GNUInline = Std.isC89();
1340 Opts.HexFloats = Std.hasHexFloats();
1341 Opts.ImplicitInt = Std.hasImplicitInt();
1342
1343 // Set OpenCL Version.
1344 Opts.OpenCL = LangStd == LangStandard::lang_opencl || IK == IK_OpenCL;
1345 if (LangStd == LangStandard::lang_opencl)
1346 Opts.OpenCLVersion = 100;
1347 else if (LangStd == LangStandard::lang_opencl11)
1348 Opts.OpenCLVersion = 110;
1349 else if (LangStd == LangStandard::lang_opencl12)
1350 Opts.OpenCLVersion = 120;
1351 else if (LangStd == LangStandard::lang_opencl20)
1352 Opts.OpenCLVersion = 200;
1353
1354 // OpenCL has some additional defaults.
1355 if (Opts.OpenCL) {
1356 Opts.AltiVec = 0;
1357 Opts.ZVector = 0;
1358 Opts.CXXOperatorNames = 1;
1359 Opts.LaxVectorConversions = 0;
1360 Opts.DefaultFPContract = 1;
1361 Opts.NativeHalfType = 1;
1362 }
1363
1364 Opts.CUDA = IK == IK_CUDA || IK == IK_PreprocessedCuda ||
1365 LangStd == LangStandard::lang_cuda;
1366
1367 // OpenCL and C++ both have bool, true, false keywords.
1368 Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1369
1370 // OpenCL has half keyword
1371 Opts.Half = Opts.OpenCL;
1372
1373 // C++ has wchar_t keyword.
1374 Opts.WChar = Opts.CPlusPlus;
1375
1376 Opts.GNUKeywords = Opts.GNUMode;
1377 Opts.CXXOperatorNames = Opts.CPlusPlus;
1378
1379 Opts.DollarIdents = !Opts.AsmPreprocessor;
1380 }
1381
1382 /// Attempt to parse a visibility value out of the given argument.
parseVisibility(Arg * arg,ArgList & args,DiagnosticsEngine & diags)1383 static Visibility parseVisibility(Arg *arg, ArgList &args,
1384 DiagnosticsEngine &diags) {
1385 StringRef value = arg->getValue();
1386 if (value == "default") {
1387 return DefaultVisibility;
1388 } else if (value == "hidden" || value == "internal") {
1389 return HiddenVisibility;
1390 } else if (value == "protected") {
1391 // FIXME: diagnose if target does not support protected visibility
1392 return ProtectedVisibility;
1393 }
1394
1395 diags.Report(diag::err_drv_invalid_value)
1396 << arg->getAsString(args) << value;
1397 return DefaultVisibility;
1398 }
1399
ParseLangArgs(LangOptions & Opts,ArgList & Args,InputKind IK,DiagnosticsEngine & Diags)1400 static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1401 DiagnosticsEngine &Diags) {
1402 // FIXME: Cleanup per-file based stuff.
1403 LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1404 if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1405 LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1406 #define LANGSTANDARD(id, name, desc, features) \
1407 .Case(name, LangStandard::lang_##id)
1408 #include "clang/Frontend/LangStandards.def"
1409 .Default(LangStandard::lang_unspecified);
1410 if (LangStd == LangStandard::lang_unspecified)
1411 Diags.Report(diag::err_drv_invalid_value)
1412 << A->getAsString(Args) << A->getValue();
1413 else {
1414 // Valid standard, check to make sure language and standard are
1415 // compatible.
1416 const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1417 switch (IK) {
1418 case IK_C:
1419 case IK_ObjC:
1420 case IK_PreprocessedC:
1421 case IK_PreprocessedObjC:
1422 if (!(Std.isC89() || Std.isC99()))
1423 Diags.Report(diag::err_drv_argument_not_allowed_with)
1424 << A->getAsString(Args) << "C/ObjC";
1425 break;
1426 case IK_CXX:
1427 case IK_ObjCXX:
1428 case IK_PreprocessedCXX:
1429 case IK_PreprocessedObjCXX:
1430 if (!Std.isCPlusPlus())
1431 Diags.Report(diag::err_drv_argument_not_allowed_with)
1432 << A->getAsString(Args) << "C++/ObjC++";
1433 break;
1434 case IK_OpenCL:
1435 if (!Std.isC99())
1436 Diags.Report(diag::err_drv_argument_not_allowed_with)
1437 << A->getAsString(Args) << "OpenCL";
1438 break;
1439 case IK_CUDA:
1440 case IK_PreprocessedCuda:
1441 if (!Std.isCPlusPlus())
1442 Diags.Report(diag::err_drv_argument_not_allowed_with)
1443 << A->getAsString(Args) << "CUDA";
1444 break;
1445 default:
1446 break;
1447 }
1448 }
1449 }
1450
1451 // -cl-std only applies for OpenCL language standards.
1452 // Override the -std option in this case.
1453 if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1454 LangStandard::Kind OpenCLLangStd
1455 = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1456 .Case("CL", LangStandard::lang_opencl)
1457 .Case("CL1.1", LangStandard::lang_opencl11)
1458 .Case("CL1.2", LangStandard::lang_opencl12)
1459 .Case("CL2.0", LangStandard::lang_opencl20)
1460 .Default(LangStandard::lang_unspecified);
1461
1462 if (OpenCLLangStd == LangStandard::lang_unspecified) {
1463 Diags.Report(diag::err_drv_invalid_value)
1464 << A->getAsString(Args) << A->getValue();
1465 }
1466 else
1467 LangStd = OpenCLLangStd;
1468 }
1469
1470 CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1471
1472 // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1473 // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1474 // while a subset (the non-C++ GNU keywords) is provided by GCC's
1475 // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1476 // name, as it doesn't seem a useful distinction.
1477 Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1478 Opts.GNUKeywords);
1479
1480 if (Args.hasArg(OPT_fno_operator_names))
1481 Opts.CXXOperatorNames = 0;
1482
1483 if (Args.hasArg(OPT_fcuda_is_device))
1484 Opts.CUDAIsDevice = 1;
1485
1486 if (Args.hasArg(OPT_fcuda_allow_host_calls_from_host_device))
1487 Opts.CUDAAllowHostCallsFromHostDevice = 1;
1488
1489 if (Args.hasArg(OPT_fcuda_disable_target_call_checks))
1490 Opts.CUDADisableTargetCallChecks = 1;
1491
1492 if (Args.hasArg(OPT_fcuda_target_overloads))
1493 Opts.CUDATargetOverloads = 1;
1494
1495 if (Opts.ObjC1) {
1496 if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1497 StringRef value = arg->getValue();
1498 if (Opts.ObjCRuntime.tryParse(value))
1499 Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1500 }
1501
1502 if (Args.hasArg(OPT_fobjc_gc_only))
1503 Opts.setGC(LangOptions::GCOnly);
1504 else if (Args.hasArg(OPT_fobjc_gc))
1505 Opts.setGC(LangOptions::HybridGC);
1506 else if (Args.hasArg(OPT_fobjc_arc)) {
1507 Opts.ObjCAutoRefCount = 1;
1508 if (!Opts.ObjCRuntime.allowsARC())
1509 Diags.Report(diag::err_arc_unsupported_on_runtime);
1510 }
1511
1512 // ObjCWeakRuntime tracks whether the runtime supports __weak, not
1513 // whether the feature is actually enabled. This is predominantly
1514 // determined by -fobjc-runtime, but we allow it to be overridden
1515 // from the command line for testing purposes.
1516 if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1517 Opts.ObjCWeakRuntime = 1;
1518 else
1519 Opts.ObjCWeakRuntime = Opts.ObjCRuntime.allowsWeak();
1520
1521 // ObjCWeak determines whether __weak is actually enabled.
1522 // Note that we allow -fno-objc-weak to disable this even in ARC mode.
1523 if (auto weakArg = Args.getLastArg(OPT_fobjc_weak, OPT_fno_objc_weak)) {
1524 if (!weakArg->getOption().matches(OPT_fobjc_weak)) {
1525 assert(!Opts.ObjCWeak);
1526 } else if (Opts.getGC() != LangOptions::NonGC) {
1527 Diags.Report(diag::err_objc_weak_with_gc);
1528 } else if (!Opts.ObjCWeakRuntime) {
1529 Diags.Report(diag::err_objc_weak_unsupported);
1530 } else {
1531 Opts.ObjCWeak = 1;
1532 }
1533 } else if (Opts.ObjCAutoRefCount) {
1534 Opts.ObjCWeak = Opts.ObjCWeakRuntime;
1535 }
1536
1537 if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1538 Opts.ObjCInferRelatedResultType = 0;
1539
1540 if (Args.hasArg(OPT_fobjc_subscripting_legacy_runtime))
1541 Opts.ObjCSubscriptingLegacyRuntime =
1542 (Opts.ObjCRuntime.getKind() == ObjCRuntime::FragileMacOSX);
1543 }
1544
1545 if (Args.hasArg(OPT_fgnu89_inline)) {
1546 if (Opts.CPlusPlus)
1547 Diags.Report(diag::err_drv_argument_not_allowed_with) << "-fgnu89-inline"
1548 << "C++/ObjC++";
1549 else
1550 Opts.GNUInline = 1;
1551 }
1552
1553 if (Args.hasArg(OPT_fapple_kext)) {
1554 if (!Opts.CPlusPlus)
1555 Diags.Report(diag::warn_c_kext);
1556 else
1557 Opts.AppleKext = 1;
1558 }
1559
1560 if (Args.hasArg(OPT_print_ivar_layout))
1561 Opts.ObjCGCBitmapPrint = 1;
1562 if (Args.hasArg(OPT_fno_constant_cfstrings))
1563 Opts.NoConstantCFStrings = 1;
1564
1565 if (Args.hasArg(OPT_faltivec))
1566 Opts.AltiVec = 1;
1567
1568 if (Args.hasArg(OPT_fzvector))
1569 Opts.ZVector = 1;
1570
1571 if (Args.hasArg(OPT_pthread))
1572 Opts.POSIXThreads = 1;
1573
1574 // The value-visibility mode defaults to "default".
1575 if (Arg *visOpt = Args.getLastArg(OPT_fvisibility)) {
1576 Opts.setValueVisibilityMode(parseVisibility(visOpt, Args, Diags));
1577 } else {
1578 Opts.setValueVisibilityMode(DefaultVisibility);
1579 }
1580
1581 // The type-visibility mode defaults to the value-visibility mode.
1582 if (Arg *typeVisOpt = Args.getLastArg(OPT_ftype_visibility)) {
1583 Opts.setTypeVisibilityMode(parseVisibility(typeVisOpt, Args, Diags));
1584 } else {
1585 Opts.setTypeVisibilityMode(Opts.getValueVisibilityMode());
1586 }
1587
1588 if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1589 Opts.InlineVisibilityHidden = 1;
1590
1591 if (Args.hasArg(OPT_ftrapv)) {
1592 Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1593 // Set the handler, if one is specified.
1594 Opts.OverflowHandler =
1595 Args.getLastArgValue(OPT_ftrapv_handler);
1596 }
1597 else if (Args.hasArg(OPT_fwrapv))
1598 Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1599
1600 Opts.MSVCCompat = Args.hasArg(OPT_fms_compatibility);
1601 Opts.MicrosoftExt = Opts.MSVCCompat || Args.hasArg(OPT_fms_extensions);
1602 Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
1603 Opts.MSCompatibilityVersion = 0;
1604 if (const Arg *A = Args.getLastArg(OPT_fms_compatibility_version)) {
1605 VersionTuple VT;
1606 if (VT.tryParse(A->getValue()))
1607 Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
1608 << A->getValue();
1609 Opts.MSCompatibilityVersion = VT.getMajor() * 10000000 +
1610 VT.getMinor().getValueOr(0) * 100000 +
1611 VT.getSubminor().getValueOr(0);
1612 }
1613
1614 // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1615 // is specified, or -std is set to a conforming mode.
1616 // Trigraphs are disabled by default in c++1z onwards.
1617 Opts.Trigraphs = !Opts.GNUMode && !Opts.MSVCCompat && !Opts.CPlusPlus1z;
1618 Opts.Trigraphs =
1619 Args.hasFlag(OPT_ftrigraphs, OPT_fno_trigraphs, Opts.Trigraphs);
1620
1621 Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1622 OPT_fno_dollars_in_identifiers,
1623 Opts.DollarIdents);
1624 Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1625 Opts.VtorDispMode = getLastArgIntValue(Args, OPT_vtordisp_mode_EQ, 1, Diags);
1626 Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1627 Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1628 Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
1629 Opts.ConstStrings);
1630 if (Args.hasArg(OPT_fno_lax_vector_conversions))
1631 Opts.LaxVectorConversions = 0;
1632 if (Args.hasArg(OPT_fno_threadsafe_statics))
1633 Opts.ThreadsafeStatics = 0;
1634 Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1635 Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
1636 Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
1637 Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1638 Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
1639
1640 Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1641 Opts.RTTIData = Opts.RTTI && !Args.hasArg(OPT_fno_rtti_data);
1642 Opts.Blocks = Args.hasArg(OPT_fblocks);
1643 Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
1644 Opts.Coroutines = Args.hasArg(OPT_fcoroutines);
1645 Opts.Modules = Args.hasArg(OPT_fmodules);
1646 Opts.ModulesStrictDeclUse = Args.hasArg(OPT_fmodules_strict_decluse);
1647 Opts.ModulesDeclUse =
1648 Args.hasArg(OPT_fmodules_decluse) || Opts.ModulesStrictDeclUse;
1649 Opts.ModulesLocalVisibility =
1650 Args.hasArg(OPT_fmodules_local_submodule_visibility);
1651 Opts.ModulesSearchAll = Opts.Modules &&
1652 !Args.hasArg(OPT_fno_modules_search_all) &&
1653 Args.hasArg(OPT_fmodules_search_all);
1654 Opts.ModulesErrorRecovery = !Args.hasArg(OPT_fno_modules_error_recovery);
1655 Opts.ImplicitModules = !Args.hasArg(OPT_fno_implicit_modules);
1656 Opts.CharIsSigned = Opts.OpenCL || !Args.hasArg(OPT_fno_signed_char);
1657 Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
1658 Opts.ShortWChar = Args.hasFlag(OPT_fshort_wchar, OPT_fno_short_wchar, false);
1659 Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1660 Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1661 Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1662 Opts.NoMathBuiltin = Args.hasArg(OPT_fno_math_builtin);
1663 Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1664 Opts.SizedDeallocation = Args.hasArg(OPT_fsized_deallocation);
1665 Opts.ConceptsTS = Args.hasArg(OPT_fconcepts_ts);
1666 Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1667 Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1668 Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1669 Opts.MathErrno = !Opts.OpenCL && Args.hasArg(OPT_fmath_errno);
1670 Opts.InstantiationDepth =
1671 getLastArgIntValue(Args, OPT_ftemplate_depth, 256, Diags);
1672 Opts.ArrowDepth =
1673 getLastArgIntValue(Args, OPT_foperator_arrow_depth, 256, Diags);
1674 Opts.ConstexprCallDepth =
1675 getLastArgIntValue(Args, OPT_fconstexpr_depth, 512, Diags);
1676 Opts.ConstexprStepLimit =
1677 getLastArgIntValue(Args, OPT_fconstexpr_steps, 1048576, Diags);
1678 Opts.BracketDepth = getLastArgIntValue(Args, OPT_fbracket_depth, 256, Diags);
1679 Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
1680 Opts.NumLargeByValueCopy =
1681 getLastArgIntValue(Args, OPT_Wlarge_by_value_copy_EQ, 0, Diags);
1682 Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
1683 Opts.ObjCConstantStringClass =
1684 Args.getLastArgValue(OPT_fconstant_string_class);
1685 Opts.ObjCDefaultSynthProperties =
1686 !Args.hasArg(OPT_disable_objc_default_synthesize_properties);
1687 Opts.EncodeExtendedBlockSig =
1688 Args.hasArg(OPT_fencode_extended_block_signature);
1689 Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1690 Opts.PackStruct = getLastArgIntValue(Args, OPT_fpack_struct_EQ, 0, Diags);
1691 Opts.MaxTypeAlign = getLastArgIntValue(Args, OPT_fmax_type_align_EQ, 0, Diags);
1692 Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
1693 Opts.PIELevel = getLastArgIntValue(Args, OPT_pie_level, 0, Diags);
1694 Opts.Static = Args.hasArg(OPT_static_define);
1695 Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
1696 Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
1697 || Args.hasArg(OPT_fdump_record_layouts);
1698 Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1699 Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1700 Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1701 Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
1702 Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
1703 Opts.MRTD = Args.hasArg(OPT_mrtd);
1704 Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
1705 Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
1706 Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
1707 Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
1708 Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
1709 Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
1710 Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
1711 Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
1712 Opts.AppExt = Args.hasArg(OPT_fapplication_extension);
1713 Opts.ImplementationOfModule =
1714 Args.getLastArgValue(OPT_fmodule_implementation_of);
1715 Opts.ModuleFeatures = Args.getAllArgValues(OPT_fmodule_feature);
1716 std::sort(Opts.ModuleFeatures.begin(), Opts.ModuleFeatures.end());
1717 Opts.NativeHalfType |= Args.hasArg(OPT_fnative_half_type);
1718 Opts.HalfArgsAndReturns = Args.hasArg(OPT_fallow_half_arguments_and_returns);
1719 Opts.GNUAsm = !Args.hasArg(OPT_fno_gnu_inline_asm);
1720
1721 // __declspec is enabled by default for the PS4 by the driver, and also
1722 // enabled for Microsoft Extensions or Borland Extensions, here.
1723 //
1724 // FIXME: __declspec is also currently enabled for CUDA, but isn't really a
1725 // CUDA extension, however it is required for supporting cuda_builtin_vars.h,
1726 // which uses __declspec(property). Once that has been rewritten in terms of
1727 // something more generic, remove the Opts.CUDA term here.
1728 Opts.DeclSpecKeyword =
1729 Args.hasFlag(OPT_fdeclspec, OPT_fno_declspec,
1730 (Opts.MicrosoftExt || Opts.Borland || Opts.CUDA));
1731
1732 if (!Opts.CurrentModule.empty() && !Opts.ImplementationOfModule.empty() &&
1733 Opts.CurrentModule != Opts.ImplementationOfModule) {
1734 Diags.Report(diag::err_conflicting_module_names)
1735 << Opts.CurrentModule << Opts.ImplementationOfModule;
1736 }
1737
1738 // For now, we only support local submodule visibility in C++ (because we
1739 // heavily depend on the ODR for merging redefinitions).
1740 if (Opts.ModulesLocalVisibility && !Opts.CPlusPlus)
1741 Diags.Report(diag::err_drv_argument_not_allowed_with)
1742 << "-fmodules-local-submodule-visibility" << "C";
1743
1744 if (Arg *A = Args.getLastArg(OPT_faddress_space_map_mangling_EQ)) {
1745 switch (llvm::StringSwitch<unsigned>(A->getValue())
1746 .Case("target", LangOptions::ASMM_Target)
1747 .Case("no", LangOptions::ASMM_Off)
1748 .Case("yes", LangOptions::ASMM_On)
1749 .Default(255)) {
1750 default:
1751 Diags.Report(diag::err_drv_invalid_value)
1752 << "-faddress-space-map-mangling=" << A->getValue();
1753 break;
1754 case LangOptions::ASMM_Target:
1755 Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Target);
1756 break;
1757 case LangOptions::ASMM_On:
1758 Opts.setAddressSpaceMapMangling(LangOptions::ASMM_On);
1759 break;
1760 case LangOptions::ASMM_Off:
1761 Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Off);
1762 break;
1763 }
1764 }
1765
1766 if (Arg *A = Args.getLastArg(OPT_fms_memptr_rep_EQ)) {
1767 LangOptions::PragmaMSPointersToMembersKind InheritanceModel =
1768 llvm::StringSwitch<LangOptions::PragmaMSPointersToMembersKind>(
1769 A->getValue())
1770 .Case("single",
1771 LangOptions::PPTMK_FullGeneralitySingleInheritance)
1772 .Case("multiple",
1773 LangOptions::PPTMK_FullGeneralityMultipleInheritance)
1774 .Case("virtual",
1775 LangOptions::PPTMK_FullGeneralityVirtualInheritance)
1776 .Default(LangOptions::PPTMK_BestCase);
1777 if (InheritanceModel == LangOptions::PPTMK_BestCase)
1778 Diags.Report(diag::err_drv_invalid_value)
1779 << "-fms-memptr-rep=" << A->getValue();
1780
1781 Opts.setMSPointerToMemberRepresentationMethod(InheritanceModel);
1782 }
1783
1784 // Check if -fopenmp is specified.
1785 Opts.OpenMP = Args.hasArg(options::OPT_fopenmp);
1786 Opts.OpenMPUseTLS =
1787 Opts.OpenMP && !Args.hasArg(options::OPT_fnoopenmp_use_tls);
1788
1789 // Record whether the __DEPRECATED define was requested.
1790 Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
1791 OPT_fno_deprecated_macro,
1792 Opts.Deprecated);
1793
1794 // FIXME: Eliminate this dependency.
1795 unsigned Opt = getOptimizationLevel(Args, IK, Diags),
1796 OptSize = getOptimizationLevelSize(Args);
1797 Opts.Optimize = Opt != 0;
1798 Opts.OptimizeSize = OptSize != 0;
1799
1800 // This is the __NO_INLINE__ define, which just depends on things like the
1801 // optimization level and -fno-inline, not actually whether the backend has
1802 // inlining enabled.
1803 Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
1804
1805 Opts.FastMath = Args.hasArg(OPT_ffast_math) ||
1806 Args.hasArg(OPT_cl_fast_relaxed_math);
1807 Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only) ||
1808 Args.hasArg(OPT_cl_finite_math_only) ||
1809 Args.hasArg(OPT_cl_fast_relaxed_math);
1810 Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
1811 Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
1812 Args.hasArg(OPT_cl_fast_relaxed_math);
1813
1814 Opts.RetainCommentsFromSystemHeaders =
1815 Args.hasArg(OPT_fretain_comments_from_system_headers);
1816
1817 unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
1818 switch (SSP) {
1819 default:
1820 Diags.Report(diag::err_drv_invalid_value)
1821 << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1822 break;
1823 case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
1824 case 1: Opts.setStackProtector(LangOptions::SSPOn); break;
1825 case 2: Opts.setStackProtector(LangOptions::SSPStrong); break;
1826 case 3: Opts.setStackProtector(LangOptions::SSPReq); break;
1827 }
1828
1829 // Parse -fsanitize= arguments.
1830 parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
1831 Diags, Opts.Sanitize);
1832 // -fsanitize-address-field-padding=N has to be a LangOpt, parse it here.
1833 Opts.SanitizeAddressFieldPadding =
1834 getLastArgIntValue(Args, OPT_fsanitize_address_field_padding, 0, Diags);
1835 Opts.SanitizerBlacklistFiles = Args.getAllArgValues(OPT_fsanitize_blacklist);
1836 }
1837
ParsePreprocessorArgs(PreprocessorOptions & Opts,ArgList & Args,FileManager & FileMgr,DiagnosticsEngine & Diags)1838 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1839 FileManager &FileMgr,
1840 DiagnosticsEngine &Diags) {
1841 using namespace options;
1842 Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1843 Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1844 if (const Arg *A = Args.getLastArg(OPT_token_cache))
1845 Opts.TokenCache = A->getValue();
1846 else
1847 Opts.TokenCache = Opts.ImplicitPTHInclude;
1848 Opts.UsePredefines = !Args.hasArg(OPT_undef);
1849 Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1850 Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1851
1852 Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
1853 for (const Arg *A : Args.filtered(OPT_error_on_deserialized_pch_decl))
1854 Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
1855
1856 if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1857 StringRef Value(A->getValue());
1858 size_t Comma = Value.find(',');
1859 unsigned Bytes = 0;
1860 unsigned EndOfLine = 0;
1861
1862 if (Comma == StringRef::npos ||
1863 Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1864 Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1865 Diags.Report(diag::err_drv_preamble_format);
1866 else {
1867 Opts.PrecompiledPreambleBytes.first = Bytes;
1868 Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1869 }
1870 }
1871
1872 // Add macros from the command line.
1873 for (const Arg *A : Args.filtered(OPT_D, OPT_U)) {
1874 if (A->getOption().matches(OPT_D))
1875 Opts.addMacroDef(A->getValue());
1876 else
1877 Opts.addMacroUndef(A->getValue());
1878 }
1879
1880 Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1881
1882 // Add the ordered list of -includes.
1883 for (const Arg *A : Args.filtered(OPT_include))
1884 Opts.Includes.emplace_back(A->getValue());
1885
1886 for (const Arg *A : Args.filtered(OPT_chain_include))
1887 Opts.ChainedIncludes.emplace_back(A->getValue());
1888
1889 // Include 'altivec.h' if -faltivec option present
1890 if (Args.hasArg(OPT_faltivec))
1891 Opts.Includes.emplace_back("altivec.h");
1892
1893 for (const Arg *A : Args.filtered(OPT_remap_file)) {
1894 std::pair<StringRef, StringRef> Split = StringRef(A->getValue()).split(';');
1895
1896 if (Split.second.empty()) {
1897 Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1898 continue;
1899 }
1900
1901 Opts.addRemappedFile(Split.first, Split.second);
1902 }
1903
1904 if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
1905 StringRef Name = A->getValue();
1906 unsigned Library = llvm::StringSwitch<unsigned>(Name)
1907 .Case("libc++", ARCXX_libcxx)
1908 .Case("libstdc++", ARCXX_libstdcxx)
1909 .Case("none", ARCXX_nolib)
1910 .Default(~0U);
1911 if (Library == ~0U)
1912 Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1913 else
1914 Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
1915 }
1916 }
1917
ParsePreprocessorOutputArgs(PreprocessorOutputOptions & Opts,ArgList & Args,frontend::ActionKind Action)1918 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1919 ArgList &Args,
1920 frontend::ActionKind Action) {
1921 using namespace options;
1922
1923 switch (Action) {
1924 case frontend::ASTDeclList:
1925 case frontend::ASTDump:
1926 case frontend::ASTPrint:
1927 case frontend::ASTView:
1928 case frontend::EmitAssembly:
1929 case frontend::EmitBC:
1930 case frontend::EmitHTML:
1931 case frontend::EmitLLVM:
1932 case frontend::EmitLLVMOnly:
1933 case frontend::EmitCodeGenOnly:
1934 case frontend::EmitObj:
1935 case frontend::FixIt:
1936 case frontend::GenerateModule:
1937 case frontend::GeneratePCH:
1938 case frontend::GeneratePTH:
1939 case frontend::ParseSyntaxOnly:
1940 case frontend::ModuleFileInfo:
1941 case frontend::VerifyPCH:
1942 case frontend::PluginAction:
1943 case frontend::PrintDeclContext:
1944 case frontend::RewriteObjC:
1945 case frontend::RewriteTest:
1946 case frontend::RunAnalysis:
1947 case frontend::MigrateSource:
1948 Opts.ShowCPP = 0;
1949 break;
1950
1951 case frontend::DumpRawTokens:
1952 case frontend::DumpTokens:
1953 case frontend::InitOnly:
1954 case frontend::PrintPreamble:
1955 case frontend::PrintPreprocessedInput:
1956 case frontend::RewriteMacros:
1957 case frontend::RunPreprocessorOnly:
1958 Opts.ShowCPP = !Args.hasArg(OPT_dM);
1959 break;
1960 }
1961
1962 Opts.ShowComments = Args.hasArg(OPT_C);
1963 Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1964 Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1965 Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1966 Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
1967 Opts.UseLineDirectives = Args.hasArg(OPT_fuse_line_directives);
1968 }
1969
ParseTargetArgs(TargetOptions & Opts,ArgList & Args)1970 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1971 using namespace options;
1972 Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1973 Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1974 Opts.FPMath = Args.getLastArgValue(OPT_mfpmath);
1975 Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
1976 Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1977 Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1978 Opts.Reciprocals = Args.getAllArgValues(OPT_mrecip_EQ);
1979 // Use the default target triple if unspecified.
1980 if (Opts.Triple.empty())
1981 Opts.Triple = llvm::sys::getDefaultTargetTriple();
1982 }
1983
CreateFromArgs(CompilerInvocation & Res,const char * const * ArgBegin,const char * const * ArgEnd,DiagnosticsEngine & Diags)1984 bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1985 const char *const *ArgBegin,
1986 const char *const *ArgEnd,
1987 DiagnosticsEngine &Diags) {
1988 bool Success = true;
1989
1990 // Parse the arguments.
1991 std::unique_ptr<OptTable> Opts(createDriverOptTable());
1992 const unsigned IncludedFlagsBitmask = options::CC1Option;
1993 unsigned MissingArgIndex, MissingArgCount;
1994 InputArgList Args =
1995 Opts->ParseArgs(llvm::makeArrayRef(ArgBegin, ArgEnd), MissingArgIndex,
1996 MissingArgCount, IncludedFlagsBitmask);
1997
1998 // Check for missing argument error.
1999 if (MissingArgCount) {
2000 Diags.Report(diag::err_drv_missing_argument)
2001 << Args.getArgString(MissingArgIndex) << MissingArgCount;
2002 Success = false;
2003 }
2004
2005 // Issue errors on unknown arguments.
2006 for (const Arg *A : Args.filtered(OPT_UNKNOWN)) {
2007 Diags.Report(diag::err_drv_unknown_argument) << A->getAsString(Args);
2008 Success = false;
2009 }
2010
2011 Success &= ParseAnalyzerArgs(*Res.getAnalyzerOpts(), Args, Diags);
2012 Success &= ParseMigratorArgs(Res.getMigratorOpts(), Args);
2013 ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), Args);
2014 Success &= ParseDiagnosticArgs(Res.getDiagnosticOpts(), Args, &Diags);
2015 ParseCommentArgs(Res.getLangOpts()->CommentOpts, Args);
2016 ParseFileSystemArgs(Res.getFileSystemOpts(), Args);
2017 // FIXME: We shouldn't have to pass the DashX option around here
2018 InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), Args, Diags);
2019 ParseTargetArgs(Res.getTargetOpts(), Args);
2020 Success &= ParseCodeGenArgs(Res.getCodeGenOpts(), Args, DashX, Diags,
2021 Res.getTargetOpts());
2022 ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), Args);
2023 if (DashX == IK_AST || DashX == IK_LLVM_IR) {
2024 // ObjCAAutoRefCount and Sanitize LangOpts are used to setup the
2025 // PassManager in BackendUtil.cpp. They need to be initializd no matter
2026 // what the input type is.
2027 if (Args.hasArg(OPT_fobjc_arc))
2028 Res.getLangOpts()->ObjCAutoRefCount = 1;
2029 parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
2030 Diags, Res.getLangOpts()->Sanitize);
2031 } else {
2032 // Other LangOpts are only initialzed when the input is not AST or LLVM IR.
2033 ParseLangArgs(*Res.getLangOpts(), Args, DashX, Diags);
2034 if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
2035 Res.getLangOpts()->ObjCExceptions = 1;
2036 }
2037 // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
2038 // PCH file and find the original header name. Remove the need to do that in
2039 // ParsePreprocessorArgs and remove the FileManager
2040 // parameters from the function and the "FileManager.h" #include.
2041 FileManager FileMgr(Res.getFileSystemOpts());
2042 ParsePreprocessorArgs(Res.getPreprocessorOpts(), Args, FileMgr, Diags);
2043 ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), Args,
2044 Res.getFrontendOpts().ProgramAction);
2045 return Success;
2046 }
2047
2048 namespace {
2049
2050 class ModuleSignature {
2051 SmallVector<uint64_t, 16> Data;
2052 unsigned CurBit;
2053 uint64_t CurValue;
2054
2055 public:
ModuleSignature()2056 ModuleSignature() : CurBit(0), CurValue(0) { }
2057
2058 void add(uint64_t Value, unsigned Bits);
2059 void add(StringRef Value);
2060 void flush();
2061
2062 llvm::APInt getAsInteger() const;
2063 };
2064 }
2065
add(uint64_t Value,unsigned int NumBits)2066 void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
2067 CurValue |= Value << CurBit;
2068 if (CurBit + NumBits < 64) {
2069 CurBit += NumBits;
2070 return;
2071 }
2072
2073 // Add the current word.
2074 Data.push_back(CurValue);
2075
2076 if (CurBit)
2077 CurValue = Value >> (64-CurBit);
2078 else
2079 CurValue = 0;
2080 CurBit = (CurBit+NumBits) & 63;
2081 }
2082
flush()2083 void ModuleSignature::flush() {
2084 if (CurBit == 0)
2085 return;
2086
2087 Data.push_back(CurValue);
2088 CurBit = 0;
2089 CurValue = 0;
2090 }
2091
add(StringRef Value)2092 void ModuleSignature::add(StringRef Value) {
2093 for (auto &c : Value)
2094 add(c, 8);
2095 }
2096
getAsInteger() const2097 llvm::APInt ModuleSignature::getAsInteger() const {
2098 return llvm::APInt(Data.size() * 64, Data);
2099 }
2100
getModuleHash() const2101 std::string CompilerInvocation::getModuleHash() const {
2102 // Note: For QoI reasons, the things we use as a hash here should all be
2103 // dumped via the -module-info flag.
2104 using llvm::hash_code;
2105 using llvm::hash_value;
2106 using llvm::hash_combine;
2107
2108 // Start the signature with the compiler version.
2109 // FIXME: We'd rather use something more cryptographically sound than
2110 // CityHash, but this will do for now.
2111 hash_code code = hash_value(getClangFullRepositoryVersion());
2112
2113 // Extend the signature with the language options
2114 #define LANGOPT(Name, Bits, Default, Description) \
2115 code = hash_combine(code, LangOpts->Name);
2116 #define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
2117 code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
2118 #define BENIGN_LANGOPT(Name, Bits, Default, Description)
2119 #define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
2120 #include "clang/Basic/LangOptions.def"
2121
2122 for (StringRef Feature : LangOpts->ModuleFeatures)
2123 code = hash_combine(code, Feature);
2124
2125 // Extend the signature with the target options.
2126 code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
2127 TargetOpts->ABI);
2128 for (unsigned i = 0, n = TargetOpts->FeaturesAsWritten.size(); i != n; ++i)
2129 code = hash_combine(code, TargetOpts->FeaturesAsWritten[i]);
2130
2131 // Extend the signature with preprocessor options.
2132 const PreprocessorOptions &ppOpts = getPreprocessorOpts();
2133 const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
2134 code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
2135
2136 for (std::vector<std::pair<std::string, bool/*isUndef*/>>::const_iterator
2137 I = getPreprocessorOpts().Macros.begin(),
2138 IEnd = getPreprocessorOpts().Macros.end();
2139 I != IEnd; ++I) {
2140 // If we're supposed to ignore this macro for the purposes of modules,
2141 // don't put it into the hash.
2142 if (!hsOpts.ModulesIgnoreMacros.empty()) {
2143 // Check whether we're ignoring this macro.
2144 StringRef MacroDef = I->first;
2145 if (hsOpts.ModulesIgnoreMacros.count(MacroDef.split('=').first))
2146 continue;
2147 }
2148
2149 code = hash_combine(code, I->first, I->second);
2150 }
2151
2152 // Extend the signature with the sysroot.
2153 code = hash_combine(code, hsOpts.Sysroot, hsOpts.UseBuiltinIncludes,
2154 hsOpts.UseStandardSystemIncludes,
2155 hsOpts.UseStandardCXXIncludes,
2156 hsOpts.UseLibcxx);
2157 code = hash_combine(code, hsOpts.ResourceDir);
2158
2159 // Extend the signature with the user build path.
2160 code = hash_combine(code, hsOpts.ModuleUserBuildPath);
2161
2162 // Extend the signature with the module file extensions.
2163 const FrontendOptions &frontendOpts = getFrontendOpts();
2164 for (auto ext : frontendOpts.ModuleFileExtensions) {
2165 code = ext->hashExtension(code);
2166 }
2167
2168 // Darwin-specific hack: if we have a sysroot, use the contents and
2169 // modification time of
2170 // $sysroot/System/Library/CoreServices/SystemVersion.plist
2171 // as part of the module hash.
2172 if (!hsOpts.Sysroot.empty()) {
2173 SmallString<128> systemVersionFile;
2174 systemVersionFile += hsOpts.Sysroot;
2175 llvm::sys::path::append(systemVersionFile, "System");
2176 llvm::sys::path::append(systemVersionFile, "Library");
2177 llvm::sys::path::append(systemVersionFile, "CoreServices");
2178 llvm::sys::path::append(systemVersionFile, "SystemVersion.plist");
2179
2180 llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> buffer =
2181 llvm::MemoryBuffer::getFile(systemVersionFile);
2182 if (buffer) {
2183 code = hash_combine(code, buffer.get()->getBuffer());
2184
2185 struct stat statBuf;
2186 if (stat(systemVersionFile.c_str(), &statBuf) == 0)
2187 code = hash_combine(code, statBuf.st_mtime);
2188 }
2189 }
2190
2191 return llvm::APInt(64, code).toString(36, /*Signed=*/false);
2192 }
2193
2194 namespace clang {
2195
2196 template<typename IntTy>
getLastArgIntValueImpl(const ArgList & Args,OptSpecifier Id,IntTy Default,DiagnosticsEngine * Diags)2197 static IntTy getLastArgIntValueImpl(const ArgList &Args, OptSpecifier Id,
2198 IntTy Default,
2199 DiagnosticsEngine *Diags) {
2200 IntTy Res = Default;
2201 if (Arg *A = Args.getLastArg(Id)) {
2202 if (StringRef(A->getValue()).getAsInteger(10, Res)) {
2203 if (Diags)
2204 Diags->Report(diag::err_drv_invalid_int_value) << A->getAsString(Args)
2205 << A->getValue();
2206 }
2207 }
2208 return Res;
2209 }
2210
2211
2212 // Declared in clang/Frontend/Utils.h.
getLastArgIntValue(const ArgList & Args,OptSpecifier Id,int Default,DiagnosticsEngine * Diags)2213 int getLastArgIntValue(const ArgList &Args, OptSpecifier Id, int Default,
2214 DiagnosticsEngine *Diags) {
2215 return getLastArgIntValueImpl<int>(Args, Id, Default, Diags);
2216 }
2217
getLastArgUInt64Value(const ArgList & Args,OptSpecifier Id,uint64_t Default,DiagnosticsEngine * Diags)2218 uint64_t getLastArgUInt64Value(const ArgList &Args, OptSpecifier Id,
2219 uint64_t Default,
2220 DiagnosticsEngine *Diags) {
2221 return getLastArgIntValueImpl<uint64_t>(Args, Id, Default, Diags);
2222 }
2223
BuryPointer(const void * Ptr)2224 void BuryPointer(const void *Ptr) {
2225 // This function may be called only a small fixed amount of times per each
2226 // invocation, otherwise we do actually have a leak which we want to report.
2227 // If this function is called more than kGraveYardMaxSize times, the pointers
2228 // will not be properly buried and a leak detector will report a leak, which
2229 // is what we want in such case.
2230 static const size_t kGraveYardMaxSize = 16;
2231 LLVM_ATTRIBUTE_UNUSED static const void *GraveYard[kGraveYardMaxSize];
2232 static std::atomic<unsigned> GraveYardSize;
2233 unsigned Idx = GraveYardSize++;
2234 if (Idx >= kGraveYardMaxSize)
2235 return;
2236 GraveYard[Idx] = Ptr;
2237 }
2238
2239 IntrusiveRefCntPtr<vfs::FileSystem>
createVFSFromCompilerInvocation(const CompilerInvocation & CI,DiagnosticsEngine & Diags)2240 createVFSFromCompilerInvocation(const CompilerInvocation &CI,
2241 DiagnosticsEngine &Diags) {
2242 if (CI.getHeaderSearchOpts().VFSOverlayFiles.empty())
2243 return vfs::getRealFileSystem();
2244
2245 IntrusiveRefCntPtr<vfs::OverlayFileSystem>
2246 Overlay(new vfs::OverlayFileSystem(vfs::getRealFileSystem()));
2247 // earlier vfs files are on the bottom
2248 for (const std::string &File : CI.getHeaderSearchOpts().VFSOverlayFiles) {
2249 llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Buffer =
2250 llvm::MemoryBuffer::getFile(File);
2251 if (!Buffer) {
2252 Diags.Report(diag::err_missing_vfs_overlay_file) << File;
2253 return IntrusiveRefCntPtr<vfs::FileSystem>();
2254 }
2255
2256 IntrusiveRefCntPtr<vfs::FileSystem> FS =
2257 vfs::getVFSFromYAML(std::move(Buffer.get()), /*DiagHandler*/ nullptr);
2258 if (!FS.get()) {
2259 Diags.Report(diag::err_invalid_vfs_overlay) << File;
2260 return IntrusiveRefCntPtr<vfs::FileSystem>();
2261 }
2262 Overlay->pushOverlay(FS);
2263 }
2264 return Overlay;
2265 }
2266 } // end namespace clang
2267