CompilerInvocation.cpp revision 288943 
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 "clang/Frontend/CompilerInvocation.h"
11#include "clang/Basic/FileManager.h"
12#include "clang/Basic/Version.h"
13#include "clang/Config/config.h"
14#include "clang/Driver/DriverDiagnostic.h"
15#include "clang/Driver/Options.h"
16#include "clang/Driver/Util.h"
17#include "clang/Frontend/FrontendDiagnostic.h"
18#include "clang/Frontend/LangStandard.h"
19#include "clang/Frontend/Utils.h"
20#include "clang/Lex/HeaderSearchOptions.h"
21#include "clang/Serialization/ASTReader.h"
22#include "llvm/ADT/Hashing.h"
23#include "llvm/ADT/STLExtras.h"
24#include "llvm/ADT/SmallVector.h"
25#include "llvm/ADT/StringExtras.h"
26#include "llvm/ADT/StringSwitch.h"
27#include "llvm/ADT/Triple.h"
28#include "llvm/Option/Arg.h"
29#include "llvm/Option/ArgList.h"
30#include "llvm/Option/OptTable.h"
31#include "llvm/Option/Option.h"
32#include "llvm/Support/CodeGen.h"
33#include "llvm/Support/ErrorHandling.h"
34#include "llvm/Support/FileSystem.h"
35#include "llvm/Support/Host.h"
36#include "llvm/Support/Path.h"
37#include "llvm/Support/Process.h"
38#include <atomic>
39#include <memory>
40#include <sys/stat.h>
41#include <system_error>
42using namespace clang;
43
44//===----------------------------------------------------------------------===//
45// Initialization.
46//===----------------------------------------------------------------------===//
47
48CompilerInvocationBase::CompilerInvocationBase()
49  : LangOpts(new LangOptions()), TargetOpts(new TargetOptions()),
50    DiagnosticOpts(new DiagnosticOptions()),
51    HeaderSearchOpts(new HeaderSearchOptions()),
52    PreprocessorOpts(new PreprocessorOptions()) {}
53
54CompilerInvocationBase::CompilerInvocationBase(const CompilerInvocationBase &X)
55  : RefCountedBase<CompilerInvocation>(),
56    LangOpts(new LangOptions(*X.getLangOpts())),
57    TargetOpts(new TargetOptions(X.getTargetOpts())),
58    DiagnosticOpts(new DiagnosticOptions(X.getDiagnosticOpts())),
59    HeaderSearchOpts(new HeaderSearchOptions(X.getHeaderSearchOpts())),
60    PreprocessorOpts(new PreprocessorOptions(X.getPreprocessorOpts())) {}
61
62CompilerInvocationBase::~CompilerInvocationBase() {}
63
64//===----------------------------------------------------------------------===//
65// Deserialization (from args)
66//===----------------------------------------------------------------------===//
67
68using namespace clang::driver;
69using namespace clang::driver::options;
70using namespace llvm::opt;
71
72//
73
74static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
75                                     DiagnosticsEngine &Diags) {
76  unsigned DefaultOpt = 0;
77  if (IK == IK_OpenCL && !Args.hasArg(OPT_cl_opt_disable))
78    DefaultOpt = 2;
79
80  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
81    if (A->getOption().matches(options::OPT_O0))
82      return 0;
83
84    if (A->getOption().matches(options::OPT_Ofast))
85      return 3;
86
87    assert (A->getOption().matches(options::OPT_O));
88
89    StringRef S(A->getValue());
90    if (S == "s" || S == "z" || S.empty())
91      return 2;
92
93    return getLastArgIntValue(Args, OPT_O, DefaultOpt, Diags);
94  }
95
96  return DefaultOpt;
97}
98
99static unsigned getOptimizationLevelSize(ArgList &Args) {
100  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
101    if (A->getOption().matches(options::OPT_O)) {
102      switch (A->getValue()[0]) {
103      default:
104        return 0;
105      case 's':
106        return 1;
107      case 'z':
108        return 2;
109      }
110    }
111  }
112  return 0;
113}
114
115static void addDiagnosticArgs(ArgList &Args, OptSpecifier Group,
116                              OptSpecifier GroupWithValue,
117                              std::vector<std::string> &Diagnostics) {
118  for (Arg *A : Args.filtered(Group)) {
119    if (A->getOption().getKind() == Option::FlagClass) {
120      // The argument is a pure flag (such as OPT_Wall or OPT_Wdeprecated). Add
121      // its name (minus the "W" or "R" at the beginning) to the warning list.
122      Diagnostics.push_back(A->getOption().getName().drop_front(1));
123    } else if (A->getOption().matches(GroupWithValue)) {
124      // This is -Wfoo= or -Rfoo=, where foo is the name of the diagnostic group.
125      Diagnostics.push_back(A->getOption().getName().drop_front(1).rtrim("=-"));
126    } else {
127      // Otherwise, add its value (for OPT_W_Joined and similar).
128      for (const char *Arg : A->getValues())
129        Diagnostics.emplace_back(Arg);
130    }
131  }
132}
133
134static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
135                              DiagnosticsEngine &Diags) {
136  using namespace options;
137  bool Success = true;
138  if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
139    StringRef Name = A->getValue();
140    AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
141#define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
142      .Case(CMDFLAG, NAME##Model)
143#include "clang/StaticAnalyzer/Core/Analyses.def"
144      .Default(NumStores);
145    if (Value == NumStores) {
146      Diags.Report(diag::err_drv_invalid_value)
147        << A->getAsString(Args) << Name;
148      Success = false;
149    } else {
150      Opts.AnalysisStoreOpt = Value;
151    }
152  }
153
154  if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
155    StringRef Name = A->getValue();
156    AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
157#define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
158      .Case(CMDFLAG, NAME##Model)
159#include "clang/StaticAnalyzer/Core/Analyses.def"
160      .Default(NumConstraints);
161    if (Value == NumConstraints) {
162      Diags.Report(diag::err_drv_invalid_value)
163        << A->getAsString(Args) << Name;
164      Success = false;
165    } else {
166      Opts.AnalysisConstraintsOpt = Value;
167    }
168  }
169
170  if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
171    StringRef Name = A->getValue();
172    AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
173#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN) \
174      .Case(CMDFLAG, PD_##NAME)
175#include "clang/StaticAnalyzer/Core/Analyses.def"
176      .Default(NUM_ANALYSIS_DIAG_CLIENTS);
177    if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
178      Diags.Report(diag::err_drv_invalid_value)
179        << A->getAsString(Args) << Name;
180      Success = false;
181    } else {
182      Opts.AnalysisDiagOpt = Value;
183    }
184  }
185
186  if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
187    StringRef Name = A->getValue();
188    AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
189#define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
190      .Case(CMDFLAG, NAME)
191#include "clang/StaticAnalyzer/Core/Analyses.def"
192      .Default(NumPurgeModes);
193    if (Value == NumPurgeModes) {
194      Diags.Report(diag::err_drv_invalid_value)
195        << A->getAsString(Args) << Name;
196      Success = false;
197    } else {
198      Opts.AnalysisPurgeOpt = Value;
199    }
200  }
201
202  if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
203    StringRef Name = A->getValue();
204    AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
205#define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
206      .Case(CMDFLAG, NAME)
207#include "clang/StaticAnalyzer/Core/Analyses.def"
208      .Default(NumInliningModes);
209    if (Value == NumInliningModes) {
210      Diags.Report(diag::err_drv_invalid_value)
211        << A->getAsString(Args) << Name;
212      Success = false;
213    } else {
214      Opts.InliningMode = Value;
215    }
216  }
217
218  Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
219  Opts.DisableAllChecks = Args.hasArg(OPT_analyzer_disable_all_checks);
220
221  Opts.visualizeExplodedGraphWithGraphViz =
222    Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
223  Opts.visualizeExplodedGraphWithUbiGraph =
224    Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
225  Opts.NoRetryExhausted = Args.hasArg(OPT_analyzer_disable_retry_exhausted);
226  Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
227  Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
228  Opts.AnalyzeNestedBlocks =
229    Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
230  Opts.eagerlyAssumeBinOpBifurcation = Args.hasArg(OPT_analyzer_eagerly_assume);
231  Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
232  Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
233  Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
234  Opts.maxBlockVisitOnPath =
235      getLastArgIntValue(Args, OPT_analyzer_max_loop, 4, Diags);
236  Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
237  Opts.InlineMaxStackDepth =
238      getLastArgIntValue(Args, OPT_analyzer_inline_max_stack_depth,
239                         Opts.InlineMaxStackDepth, Diags);
240
241  Opts.CheckersControlList.clear();
242  for (const Arg *A :
243       Args.filtered(OPT_analyzer_checker, OPT_analyzer_disable_checker)) {
244    A->claim();
245    bool enable = (A->getOption().getID() == OPT_analyzer_checker);
246    // We can have a list of comma separated checker names, e.g:
247    // '-analyzer-checker=cocoa,unix'
248    StringRef checkerList = A->getValue();
249    SmallVector<StringRef, 4> checkers;
250    checkerList.split(checkers, ",");
251    for (StringRef checker : checkers)
252      Opts.CheckersControlList.emplace_back(checker, enable);
253  }
254
255  // Go through the analyzer configuration options.
256  for (const Arg *A : Args.filtered(OPT_analyzer_config)) {
257    A->claim();
258    // We can have a list of comma separated config names, e.g:
259    // '-analyzer-config key1=val1,key2=val2'
260    StringRef configList = A->getValue();
261    SmallVector<StringRef, 4> configVals;
262    configList.split(configVals, ",");
263    for (unsigned i = 0, e = configVals.size(); i != e; ++i) {
264      StringRef key, val;
265      std::tie(key, val) = configVals[i].split("=");
266      if (val.empty()) {
267        Diags.Report(SourceLocation(),
268                     diag::err_analyzer_config_no_value) << configVals[i];
269        Success = false;
270        break;
271      }
272      if (val.find('=') != StringRef::npos) {
273        Diags.Report(SourceLocation(),
274                     diag::err_analyzer_config_multiple_values)
275          << configVals[i];
276        Success = false;
277        break;
278      }
279      Opts.Config[key] = val;
280    }
281  }
282
283  return Success;
284}
285
286static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
287  Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
288  Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
289  return true;
290}
291
292static void ParseCommentArgs(CommentOptions &Opts, ArgList &Args) {
293  Opts.BlockCommandNames = Args.getAllArgValues(OPT_fcomment_block_commands);
294  Opts.ParseAllComments = Args.hasArg(OPT_fparse_all_comments);
295}
296
297static StringRef getCodeModel(ArgList &Args, DiagnosticsEngine &Diags) {
298  if (Arg *A = Args.getLastArg(OPT_mcode_model)) {
299    StringRef Value = A->getValue();
300    if (Value == "small" || Value == "kernel" || Value == "medium" ||
301        Value == "large")
302      return Value;
303    Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Value;
304  }
305  return "default";
306}
307
308/// \brief Create a new Regex instance out of the string value in \p RpassArg.
309/// It returns a pointer to the newly generated Regex instance.
310static std::shared_ptr<llvm::Regex>
311GenerateOptimizationRemarkRegex(DiagnosticsEngine &Diags, ArgList &Args,
312                                Arg *RpassArg) {
313  StringRef Val = RpassArg->getValue();
314  std::string RegexError;
315  std::shared_ptr<llvm::Regex> Pattern = std::make_shared<llvm::Regex>(Val);
316  if (!Pattern->isValid(RegexError)) {
317    Diags.Report(diag::err_drv_optimization_remark_pattern)
318        << RegexError << RpassArg->getAsString(Args);
319    Pattern.reset();
320  }
321  return Pattern;
322}
323
324static bool parseDiagnosticLevelMask(StringRef FlagName,
325                                     const std::vector<std::string> &Levels,
326                                     DiagnosticsEngine *Diags,
327                                     DiagnosticLevelMask &M) {
328  bool Success = true;
329  for (const auto &Level : Levels) {
330    DiagnosticLevelMask const PM =
331      llvm::StringSwitch<DiagnosticLevelMask>(Level)
332        .Case("note",    DiagnosticLevelMask::Note)
333        .Case("remark",  DiagnosticLevelMask::Remark)
334        .Case("warning", DiagnosticLevelMask::Warning)
335        .Case("error",   DiagnosticLevelMask::Error)
336        .Default(DiagnosticLevelMask::None);
337    if (PM == DiagnosticLevelMask::None) {
338      Success = false;
339      if (Diags)
340        Diags->Report(diag::err_drv_invalid_value) << FlagName << Level;
341    }
342    M = M | PM;
343  }
344  return Success;
345}
346
347static void parseSanitizerKinds(StringRef FlagName,
348                                const std::vector<std::string> &Sanitizers,
349                                DiagnosticsEngine &Diags, SanitizerSet &S) {
350  for (const auto &Sanitizer : Sanitizers) {
351    SanitizerMask K = parseSanitizerValue(Sanitizer, /*AllowGroups=*/false);
352    if (K == 0)
353      Diags.Report(diag::err_drv_invalid_value) << FlagName << Sanitizer;
354    else
355      S.set(K, true);
356  }
357}
358
359static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
360                             DiagnosticsEngine &Diags,
361                             const TargetOptions &TargetOpts) {
362  using namespace options;
363  bool Success = true;
364
365  unsigned OptimizationLevel = getOptimizationLevel(Args, IK, Diags);
366  // TODO: This could be done in Driver
367  unsigned MaxOptLevel = 3;
368  if (OptimizationLevel > MaxOptLevel) {
369    // If the optimization level is not supported, fall back on the default
370    // optimization
371    Diags.Report(diag::warn_drv_optimization_value)
372        << Args.getLastArg(OPT_O)->getAsString(Args) << "-O" << MaxOptLevel;
373    OptimizationLevel = MaxOptLevel;
374  }
375  Opts.OptimizationLevel = OptimizationLevel;
376
377  // We must always run at least the always inlining pass.
378  Opts.setInlining(
379    (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
380                                 : CodeGenOptions::OnlyAlwaysInlining);
381  // -fno-inline-functions overrides OptimizationLevel > 1.
382  Opts.NoInline = Args.hasArg(OPT_fno_inline);
383  Opts.setInlining(Args.hasArg(OPT_fno_inline_functions) ?
384                     CodeGenOptions::OnlyAlwaysInlining : Opts.getInlining());
385
386  if (Arg *A = Args.getLastArg(OPT_fveclib)) {
387    StringRef Name = A->getValue();
388    if (Name == "Accelerate")
389      Opts.setVecLib(CodeGenOptions::Accelerate);
390    else if (Name == "none")
391      Opts.setVecLib(CodeGenOptions::NoLibrary);
392    else
393      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
394  }
395
396  if (Args.hasArg(OPT_gline_tables_only)) {
397    Opts.setDebugInfo(CodeGenOptions::DebugLineTablesOnly);
398  } else if (Args.hasArg(OPT_g_Flag) || Args.hasArg(OPT_gdwarf_2) ||
399             Args.hasArg(OPT_gdwarf_3) || Args.hasArg(OPT_gdwarf_4)) {
400    bool Default = false;
401    // Until dtrace (via CTF) and LLDB can deal with distributed debug info,
402    // Darwin and FreeBSD default to standalone/full debug info.
403    if (llvm::Triple(TargetOpts.Triple).isOSDarwin() ||
404        llvm::Triple(TargetOpts.Triple).isOSFreeBSD())
405      Default = true;
406
407    if (Args.hasFlag(OPT_fstandalone_debug, OPT_fno_standalone_debug, Default))
408      Opts.setDebugInfo(CodeGenOptions::FullDebugInfo);
409    else
410      Opts.setDebugInfo(CodeGenOptions::LimitedDebugInfo);
411  }
412  Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
413  Opts.SplitDwarfFile = Args.getLastArgValue(OPT_split_dwarf_file);
414  if (Args.hasArg(OPT_gdwarf_2))
415    Opts.DwarfVersion = 2;
416  else if (Args.hasArg(OPT_gdwarf_3))
417    Opts.DwarfVersion = 3;
418  else if (Args.hasArg(OPT_gdwarf_4))
419    Opts.DwarfVersion = 4;
420  else if (Opts.getDebugInfo() != CodeGenOptions::NoDebugInfo)
421    // Default Dwarf version is 4 if we are generating debug information.
422    Opts.DwarfVersion = 4;
423
424  if (const Arg *A =
425          Args.getLastArg(OPT_emit_llvm_uselists, OPT_no_emit_llvm_uselists))
426    Opts.EmitLLVMUseLists = A->getOption().getID() == OPT_emit_llvm_uselists;
427
428  Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
429  Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
430  Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
431  Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
432    OPT_fuse_register_sized_bitfield_access);
433  Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
434  Opts.StructPathTBAA = !Args.hasArg(OPT_no_struct_path_tbaa);
435  Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
436  Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
437  Opts.NoCommon = Args.hasArg(OPT_fno_common);
438  Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
439  Opts.OptimizeSize = getOptimizationLevelSize(Args);
440  Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
441                            Args.hasArg(OPT_ffreestanding));
442  Opts.UnrollLoops =
443      Args.hasFlag(OPT_funroll_loops, OPT_fno_unroll_loops,
444                   (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize));
445  Opts.RerollLoops = Args.hasArg(OPT_freroll_loops);
446
447  Opts.DisableIntegratedAS = Args.hasArg(OPT_fno_integrated_as);
448  Opts.Autolink = !Args.hasArg(OPT_fno_autolink);
449  Opts.SampleProfileFile = Args.getLastArgValue(OPT_fprofile_sample_use_EQ);
450  Opts.ProfileInstrGenerate = Args.hasArg(OPT_fprofile_instr_generate) ||
451      Args.hasArg(OPT_fprofile_instr_generate_EQ);
452  Opts.InstrProfileOutput = Args.getLastArgValue(OPT_fprofile_instr_generate_EQ);
453  Opts.InstrProfileInput = Args.getLastArgValue(OPT_fprofile_instr_use_EQ);
454  Opts.CoverageMapping = Args.hasArg(OPT_fcoverage_mapping);
455  Opts.DumpCoverageMapping = Args.hasArg(OPT_dump_coverage_mapping);
456  Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
457  Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
458  Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
459  Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
460  Opts.CodeModel = getCodeModel(Args, Diags);
461  Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
462  Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
463  Opts.DisableFree = Args.hasArg(OPT_disable_free);
464  Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
465  Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
466  Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
467  Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
468  Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
469                       Args.hasArg(OPT_cl_finite_math_only) ||
470                       Args.hasArg(OPT_cl_fast_relaxed_math));
471  Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
472                       Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
473                       Args.hasArg(OPT_cl_finite_math_only) ||
474                       Args.hasArg(OPT_cl_fast_relaxed_math));
475  Opts.NoSignedZeros = Args.hasArg(OPT_fno_signed_zeros);
476  Opts.ReciprocalMath = Args.hasArg(OPT_freciprocal_math);
477  Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
478  Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
479  Opts.NumRegisterParameters = getLastArgIntValue(Args, OPT_mregparm, 0, Diags);
480  Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
481  Opts.FatalWarnings = Args.hasArg(OPT_massembler_fatal_warnings);
482  Opts.EnableSegmentedStacks = Args.hasArg(OPT_split_stacks);
483  Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
484  Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
485  Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
486  Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
487  Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
488  Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
489  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
490                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
491                      Args.hasArg(OPT_cl_fast_relaxed_math);
492  Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
493  Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
494  Opts.ThreadModel = Args.getLastArgValue(OPT_mthread_model, "posix");
495  if (Opts.ThreadModel != "posix" && Opts.ThreadModel != "single")
496    Diags.Report(diag::err_drv_invalid_value)
497        << Args.getLastArg(OPT_mthread_model)->getAsString(Args)
498        << Opts.ThreadModel;
499  Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
500  Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
501
502  Opts.FunctionSections = Args.hasFlag(OPT_ffunction_sections,
503                                       OPT_fno_function_sections, false);
504  Opts.DataSections = Args.hasFlag(OPT_fdata_sections,
505                                   OPT_fno_data_sections, false);
506  Opts.UniqueSectionNames = Args.hasFlag(OPT_funique_section_names,
507                                         OPT_fno_unique_section_names, true);
508
509  Opts.MergeFunctions = Args.hasArg(OPT_fmerge_functions);
510
511  Opts.PrepareForLTO = Args.hasArg(OPT_flto);
512
513  Opts.MSVolatile = Args.hasArg(OPT_fms_volatile);
514
515  Opts.VectorizeBB = Args.hasArg(OPT_vectorize_slp_aggressive);
516  Opts.VectorizeLoop = Args.hasArg(OPT_vectorize_loops);
517  Opts.VectorizeSLP = Args.hasArg(OPT_vectorize_slp);
518
519  Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
520  Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
521
522  Opts.DisableGCov = Args.hasArg(OPT_test_coverage);
523  Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
524  Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
525  if (Opts.EmitGcovArcs || Opts.EmitGcovNotes) {
526    Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
527    Opts.CoverageExtraChecksum = Args.hasArg(OPT_coverage_cfg_checksum);
528    Opts.CoverageNoFunctionNamesInData =
529        Args.hasArg(OPT_coverage_no_function_names_in_data);
530    Opts.CoverageExitBlockBeforeBody =
531        Args.hasArg(OPT_coverage_exit_block_before_body);
532    if (Args.hasArg(OPT_coverage_version_EQ)) {
533      StringRef CoverageVersion = Args.getLastArgValue(OPT_coverage_version_EQ);
534      if (CoverageVersion.size() != 4) {
535        Diags.Report(diag::err_drv_invalid_value)
536            << Args.getLastArg(OPT_coverage_version_EQ)->getAsString(Args)
537            << CoverageVersion;
538      } else {
539        memcpy(Opts.CoverageVersion, CoverageVersion.data(), 4);
540      }
541    }
542  }
543
544  Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
545  Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
546  Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
547  Opts.CompressDebugSections = Args.hasArg(OPT_compress_debug_sections);
548  Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
549  Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
550  Opts.SanitizeCoverageType =
551      getLastArgIntValue(Args, OPT_fsanitize_coverage_type, 0, Diags);
552  Opts.SanitizeCoverageIndirectCalls =
553      Args.hasArg(OPT_fsanitize_coverage_indirect_calls);
554  Opts.SanitizeCoverageTraceBB = Args.hasArg(OPT_fsanitize_coverage_trace_bb);
555  Opts.SanitizeCoverageTraceCmp = Args.hasArg(OPT_fsanitize_coverage_trace_cmp);
556  Opts.SanitizeCoverage8bitCounters =
557      Args.hasArg(OPT_fsanitize_coverage_8bit_counters);
558  Opts.SanitizeMemoryTrackOrigins =
559      getLastArgIntValue(Args, OPT_fsanitize_memory_track_origins_EQ, 0, Diags);
560  Opts.SanitizeMemoryUseAfterDtor =
561      Args.hasArg(OPT_fsanitize_memory_use_after_dtor);
562  Opts.SSPBufferSize =
563      getLastArgIntValue(Args, OPT_stack_protector_buffer_size, 8, Diags);
564  Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
565  if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
566    StringRef Val = A->getValue();
567    unsigned StackAlignment = Opts.StackAlignment;
568    Val.getAsInteger(10, StackAlignment);
569    Opts.StackAlignment = StackAlignment;
570  }
571
572  if (Arg *A = Args.getLastArg(OPT_mstack_probe_size)) {
573    StringRef Val = A->getValue();
574    unsigned StackProbeSize = Opts.StackProbeSize;
575    Val.getAsInteger(0, StackProbeSize);
576    Opts.StackProbeSize = StackProbeSize;
577  }
578
579  if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
580    StringRef Name = A->getValue();
581    unsigned Method = llvm::StringSwitch<unsigned>(Name)
582      .Case("legacy", CodeGenOptions::Legacy)
583      .Case("non-legacy", CodeGenOptions::NonLegacy)
584      .Case("mixed", CodeGenOptions::Mixed)
585      .Default(~0U);
586    if (Method == ~0U) {
587      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
588      Success = false;
589    } else {
590      Opts.setObjCDispatchMethod(
591        static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
592    }
593  }
594
595  if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
596    StringRef Name = A->getValue();
597    unsigned Model = llvm::StringSwitch<unsigned>(Name)
598        .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
599        .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
600        .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
601        .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
602        .Default(~0U);
603    if (Model == ~0U) {
604      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
605      Success = false;
606    } else {
607      Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
608    }
609  }
610
611  if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
612    StringRef Val = A->getValue();
613    if (Val == "fast")
614      Opts.setFPContractMode(CodeGenOptions::FPC_Fast);
615    else if (Val == "on")
616      Opts.setFPContractMode(CodeGenOptions::FPC_On);
617    else if (Val == "off")
618      Opts.setFPContractMode(CodeGenOptions::FPC_Off);
619    else
620      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
621  }
622
623  if (Arg *A = Args.getLastArg(OPT_fpcc_struct_return, OPT_freg_struct_return)) {
624    if (A->getOption().matches(OPT_fpcc_struct_return)) {
625      Opts.setStructReturnConvention(CodeGenOptions::SRCK_OnStack);
626    } else {
627      assert(A->getOption().matches(OPT_freg_struct_return));
628      Opts.setStructReturnConvention(CodeGenOptions::SRCK_InRegs);
629    }
630  }
631
632  Opts.DependentLibraries = Args.getAllArgValues(OPT_dependent_lib);
633  bool NeedLocTracking = false;
634
635  if (Arg *A = Args.getLastArg(OPT_Rpass_EQ)) {
636    Opts.OptimizationRemarkPattern =
637        GenerateOptimizationRemarkRegex(Diags, Args, A);
638    NeedLocTracking = true;
639  }
640
641  if (Arg *A = Args.getLastArg(OPT_Rpass_missed_EQ)) {
642    Opts.OptimizationRemarkMissedPattern =
643        GenerateOptimizationRemarkRegex(Diags, Args, A);
644    NeedLocTracking = true;
645  }
646
647  if (Arg *A = Args.getLastArg(OPT_Rpass_analysis_EQ)) {
648    Opts.OptimizationRemarkAnalysisPattern =
649        GenerateOptimizationRemarkRegex(Diags, Args, A);
650    NeedLocTracking = true;
651  }
652
653  // If the user requested to use a sample profile for PGO, then the
654  // backend will need to track source location information so the profile
655  // can be incorporated into the IR.
656  if (!Opts.SampleProfileFile.empty())
657    NeedLocTracking = true;
658
659  // If the user requested a flag that requires source locations available in
660  // the backend, make sure that the backend tracks source location information.
661  if (NeedLocTracking && Opts.getDebugInfo() == CodeGenOptions::NoDebugInfo)
662    Opts.setDebugInfo(CodeGenOptions::LocTrackingOnly);
663
664  Opts.RewriteMapFiles = Args.getAllArgValues(OPT_frewrite_map_file);
665
666  // Parse -fsanitize-recover= arguments.
667  // FIXME: Report unrecoverable sanitizers incorrectly specified here.
668  parseSanitizerKinds("-fsanitize-recover=",
669                      Args.getAllArgValues(OPT_fsanitize_recover_EQ), Diags,
670                      Opts.SanitizeRecover);
671  parseSanitizerKinds("-fsanitize-trap=",
672                      Args.getAllArgValues(OPT_fsanitize_trap_EQ), Diags,
673                      Opts.SanitizeTrap);
674
675  Opts.CudaGpuBinaryFileNames =
676      Args.getAllArgValues(OPT_fcuda_include_gpubinary);
677
678  return Success;
679}
680
681static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
682                                      ArgList &Args) {
683  using namespace options;
684  Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
685  Opts.Targets = Args.getAllArgValues(OPT_MT);
686  Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
687  Opts.IncludeModuleFiles = Args.hasArg(OPT_module_file_deps);
688  Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
689  Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
690  Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
691  Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
692  Opts.PrintShowIncludes = Args.hasArg(OPT_show_includes);
693  Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
694  Opts.ModuleDependencyOutputDir =
695      Args.getLastArgValue(OPT_module_dependency_dir);
696  if (Args.hasArg(OPT_MV))
697    Opts.OutputFormat = DependencyOutputFormat::NMake;
698}
699
700bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
701                                DiagnosticsEngine *Diags) {
702  using namespace options;
703  bool Success = true;
704
705  Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
706  if (Arg *A =
707          Args.getLastArg(OPT_diagnostic_serialized_file, OPT__serialize_diags))
708    Opts.DiagnosticSerializationFile = A->getValue();
709  Opts.IgnoreWarnings = Args.hasArg(OPT_w);
710  Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
711  Opts.Pedantic = Args.hasArg(OPT_pedantic);
712  Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
713  Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
714  Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
715  Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
716                                 OPT_fno_show_column,
717                                 /*Default=*/true);
718  Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
719  Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
720  Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
721
722  llvm::sys::Process::UseANSIEscapeCodes(Args.hasArg(OPT_fansi_escape_codes));
723
724  // Default behavior is to not to show note include stacks.
725  Opts.ShowNoteIncludeStack = false;
726  if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
727                               OPT_fno_diagnostics_show_note_include_stack))
728    if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
729      Opts.ShowNoteIncludeStack = true;
730
731  StringRef ShowOverloads =
732    Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
733  if (ShowOverloads == "best")
734    Opts.setShowOverloads(Ovl_Best);
735  else if (ShowOverloads == "all")
736    Opts.setShowOverloads(Ovl_All);
737  else {
738    Success = false;
739    if (Diags)
740      Diags->Report(diag::err_drv_invalid_value)
741      << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
742      << ShowOverloads;
743  }
744
745  StringRef ShowCategory =
746    Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
747  if (ShowCategory == "none")
748    Opts.ShowCategories = 0;
749  else if (ShowCategory == "id")
750    Opts.ShowCategories = 1;
751  else if (ShowCategory == "name")
752    Opts.ShowCategories = 2;
753  else {
754    Success = false;
755    if (Diags)
756      Diags->Report(diag::err_drv_invalid_value)
757      << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
758      << ShowCategory;
759  }
760
761  StringRef Format =
762    Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
763  if (Format == "clang")
764    Opts.setFormat(DiagnosticOptions::Clang);
765  else if (Format == "msvc")
766    Opts.setFormat(DiagnosticOptions::MSVC);
767  else if (Format == "msvc-fallback") {
768    Opts.setFormat(DiagnosticOptions::MSVC);
769    Opts.CLFallbackMode = true;
770  } else if (Format == "vi")
771    Opts.setFormat(DiagnosticOptions::Vi);
772  else {
773    Success = false;
774    if (Diags)
775      Diags->Report(diag::err_drv_invalid_value)
776      << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
777      << Format;
778  }
779
780  Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
781  Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
782  Opts.ShowPresumedLoc = !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
783  Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
784  DiagnosticLevelMask DiagMask = DiagnosticLevelMask::None;
785  Success &= parseDiagnosticLevelMask("-verify-ignore-unexpected=",
786    Args.getAllArgValues(OPT_verify_ignore_unexpected_EQ),
787    Diags, DiagMask);
788  if (Args.hasArg(OPT_verify_ignore_unexpected))
789    DiagMask = DiagnosticLevelMask::All;
790  Opts.setVerifyIgnoreUnexpected(DiagMask);
791  Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
792  Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
793  Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
794  Opts.MacroBacktraceLimit =
795      getLastArgIntValue(Args, OPT_fmacro_backtrace_limit,
796                         DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
797  Opts.TemplateBacktraceLimit = getLastArgIntValue(
798      Args, OPT_ftemplate_backtrace_limit,
799      DiagnosticOptions::DefaultTemplateBacktraceLimit, Diags);
800  Opts.ConstexprBacktraceLimit = getLastArgIntValue(
801      Args, OPT_fconstexpr_backtrace_limit,
802      DiagnosticOptions::DefaultConstexprBacktraceLimit, Diags);
803  Opts.SpellCheckingLimit = getLastArgIntValue(
804      Args, OPT_fspell_checking_limit,
805      DiagnosticOptions::DefaultSpellCheckingLimit, Diags);
806  Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
807                                    DiagnosticOptions::DefaultTabStop, Diags);
808  if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
809    Opts.TabStop = DiagnosticOptions::DefaultTabStop;
810    if (Diags)
811      Diags->Report(diag::warn_ignoring_ftabstop_value)
812      << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
813  }
814  Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
815  addDiagnosticArgs(Args, OPT_W_Group, OPT_W_value_Group, Opts.Warnings);
816  addDiagnosticArgs(Args, OPT_R_Group, OPT_R_value_Group, Opts.Remarks);
817
818  return Success;
819}
820
821static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
822  Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
823}
824
825static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
826                                   DiagnosticsEngine &Diags) {
827  using namespace options;
828  Opts.ProgramAction = frontend::ParseSyntaxOnly;
829  if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
830    switch (A->getOption().getID()) {
831    default:
832      llvm_unreachable("Invalid option in group!");
833    case OPT_ast_list:
834      Opts.ProgramAction = frontend::ASTDeclList; break;
835    case OPT_ast_dump:
836    case OPT_ast_dump_lookups:
837      Opts.ProgramAction = frontend::ASTDump; break;
838    case OPT_ast_print:
839      Opts.ProgramAction = frontend::ASTPrint; break;
840    case OPT_ast_view:
841      Opts.ProgramAction = frontend::ASTView; break;
842    case OPT_dump_raw_tokens:
843      Opts.ProgramAction = frontend::DumpRawTokens; break;
844    case OPT_dump_tokens:
845      Opts.ProgramAction = frontend::DumpTokens; break;
846    case OPT_S:
847      Opts.ProgramAction = frontend::EmitAssembly; break;
848    case OPT_emit_llvm_bc:
849      Opts.ProgramAction = frontend::EmitBC; break;
850    case OPT_emit_html:
851      Opts.ProgramAction = frontend::EmitHTML; break;
852    case OPT_emit_llvm:
853      Opts.ProgramAction = frontend::EmitLLVM; break;
854    case OPT_emit_llvm_only:
855      Opts.ProgramAction = frontend::EmitLLVMOnly; break;
856    case OPT_emit_codegen_only:
857      Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
858    case OPT_emit_obj:
859      Opts.ProgramAction = frontend::EmitObj; break;
860    case OPT_fixit_EQ:
861      Opts.FixItSuffix = A->getValue();
862      // fall-through!
863    case OPT_fixit:
864      Opts.ProgramAction = frontend::FixIt; break;
865    case OPT_emit_module:
866      Opts.ProgramAction = frontend::GenerateModule; break;
867    case OPT_emit_pch:
868      Opts.ProgramAction = frontend::GeneratePCH; break;
869    case OPT_emit_pth:
870      Opts.ProgramAction = frontend::GeneratePTH; break;
871    case OPT_init_only:
872      Opts.ProgramAction = frontend::InitOnly; break;
873    case OPT_fsyntax_only:
874      Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
875    case OPT_module_file_info:
876      Opts.ProgramAction = frontend::ModuleFileInfo; break;
877    case OPT_verify_pch:
878      Opts.ProgramAction = frontend::VerifyPCH; break;
879    case OPT_print_decl_contexts:
880      Opts.ProgramAction = frontend::PrintDeclContext; break;
881    case OPT_print_preamble:
882      Opts.ProgramAction = frontend::PrintPreamble; break;
883    case OPT_E:
884      Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
885    case OPT_rewrite_macros:
886      Opts.ProgramAction = frontend::RewriteMacros; break;
887    case OPT_rewrite_objc:
888      Opts.ProgramAction = frontend::RewriteObjC; break;
889    case OPT_rewrite_test:
890      Opts.ProgramAction = frontend::RewriteTest; break;
891    case OPT_analyze:
892      Opts.ProgramAction = frontend::RunAnalysis; break;
893    case OPT_migrate:
894      Opts.ProgramAction = frontend::MigrateSource; break;
895    case OPT_Eonly:
896      Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
897    }
898  }
899
900  if (const Arg* A = Args.getLastArg(OPT_plugin)) {
901    Opts.Plugins.emplace_back(A->getValue(0));
902    Opts.ProgramAction = frontend::PluginAction;
903    Opts.ActionName = A->getValue();
904
905    for (const Arg *AA : Args.filtered(OPT_plugin_arg))
906      if (AA->getValue(0) == Opts.ActionName)
907        Opts.PluginArgs.emplace_back(AA->getValue(1));
908  }
909
910  Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
911  Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
912  for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i)
913    for (const Arg *A : Args.filtered(OPT_plugin_arg))
914      if (A->getValue(0) == Opts.AddPluginActions[i])
915        Opts.AddPluginArgs[i].emplace_back(A->getValue(1));
916
917  if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
918    Opts.CodeCompletionAt =
919      ParsedSourceLocation::FromString(A->getValue());
920    if (Opts.CodeCompletionAt.FileName.empty())
921      Diags.Report(diag::err_drv_invalid_value)
922        << A->getAsString(Args) << A->getValue();
923  }
924  Opts.DisableFree = Args.hasArg(OPT_disable_free);
925
926  Opts.OutputFile = Args.getLastArgValue(OPT_o);
927  Opts.Plugins = Args.getAllArgValues(OPT_load);
928  Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
929  Opts.ShowHelp = Args.hasArg(OPT_help);
930  Opts.ShowStats = Args.hasArg(OPT_print_stats);
931  Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
932  Opts.ShowVersion = Args.hasArg(OPT_version);
933  Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
934  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
935  Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
936  Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
937  Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
938  Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
939  Opts.ASTDumpDecls = Args.hasArg(OPT_ast_dump);
940  Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
941  Opts.ASTDumpLookups = Args.hasArg(OPT_ast_dump_lookups);
942  Opts.UseGlobalModuleIndex = !Args.hasArg(OPT_fno_modules_global_index);
943  Opts.GenerateGlobalModuleIndex = Opts.UseGlobalModuleIndex;
944  Opts.ModuleMapFiles = Args.getAllArgValues(OPT_fmodule_map_file);
945  Opts.ModuleFiles = Args.getAllArgValues(OPT_fmodule_file);
946
947  Opts.CodeCompleteOpts.IncludeMacros
948    = Args.hasArg(OPT_code_completion_macros);
949  Opts.CodeCompleteOpts.IncludeCodePatterns
950    = Args.hasArg(OPT_code_completion_patterns);
951  Opts.CodeCompleteOpts.IncludeGlobals
952    = !Args.hasArg(OPT_no_code_completion_globals);
953  Opts.CodeCompleteOpts.IncludeBriefComments
954    = Args.hasArg(OPT_code_completion_brief_comments);
955
956  Opts.OverrideRecordLayoutsFile
957    = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
958  if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
959                                     OPT_arcmt_modify,
960                                     OPT_arcmt_migrate)) {
961    switch (A->getOption().getID()) {
962    default:
963      llvm_unreachable("missed a case");
964    case OPT_arcmt_check:
965      Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
966      break;
967    case OPT_arcmt_modify:
968      Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
969      break;
970    case OPT_arcmt_migrate:
971      Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
972      break;
973    }
974  }
975  Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
976  Opts.ARCMTMigrateReportOut
977    = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
978  Opts.ARCMTMigrateEmitARCErrors
979    = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
980
981  if (Args.hasArg(OPT_objcmt_migrate_literals))
982    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
983  if (Args.hasArg(OPT_objcmt_migrate_subscripting))
984    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
985  if (Args.hasArg(OPT_objcmt_migrate_property_dot_syntax))
986    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_PropertyDotSyntax;
987  if (Args.hasArg(OPT_objcmt_migrate_property))
988    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Property;
989  if (Args.hasArg(OPT_objcmt_migrate_readonly_property))
990    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadonlyProperty;
991  if (Args.hasArg(OPT_objcmt_migrate_readwrite_property))
992    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadwriteProperty;
993  if (Args.hasArg(OPT_objcmt_migrate_annotation))
994    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Annotation;
995  if (Args.hasArg(OPT_objcmt_returns_innerpointer_property))
996    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReturnsInnerPointerProperty;
997  if (Args.hasArg(OPT_objcmt_migrate_instancetype))
998    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Instancetype;
999  if (Args.hasArg(OPT_objcmt_migrate_nsmacros))
1000    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsMacros;
1001  if (Args.hasArg(OPT_objcmt_migrate_protocol_conformance))
1002    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ProtocolConformance;
1003  if (Args.hasArg(OPT_objcmt_atomic_property))
1004    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_AtomicProperty;
1005  if (Args.hasArg(OPT_objcmt_ns_nonatomic_iosonly))
1006    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsAtomicIOSOnlyProperty;
1007  if (Args.hasArg(OPT_objcmt_migrate_designated_init))
1008    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_DesignatedInitializer;
1009  if (Args.hasArg(OPT_objcmt_migrate_all))
1010    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_MigrateDecls;
1011
1012  Opts.ObjCMTWhiteListPath = Args.getLastArgValue(OPT_objcmt_whitelist_dir_path);
1013
1014  if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
1015      Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
1016    Diags.Report(diag::err_drv_argument_not_allowed_with)
1017      << "ARC migration" << "ObjC migration";
1018  }
1019
1020  InputKind DashX = IK_None;
1021  if (const Arg *A = Args.getLastArg(OPT_x)) {
1022    DashX = llvm::StringSwitch<InputKind>(A->getValue())
1023      .Case("c", IK_C)
1024      .Case("cl", IK_OpenCL)
1025      .Case("cuda", IK_CUDA)
1026      .Case("c++", IK_CXX)
1027      .Case("objective-c", IK_ObjC)
1028      .Case("objective-c++", IK_ObjCXX)
1029      .Case("cpp-output", IK_PreprocessedC)
1030      .Case("assembler-with-cpp", IK_Asm)
1031      .Case("c++-cpp-output", IK_PreprocessedCXX)
1032      .Case("cuda-cpp-output", IK_PreprocessedCuda)
1033      .Case("objective-c-cpp-output", IK_PreprocessedObjC)
1034      .Case("objc-cpp-output", IK_PreprocessedObjC)
1035      .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
1036      .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
1037      .Case("c-header", IK_C)
1038      .Case("cl-header", IK_OpenCL)
1039      .Case("objective-c-header", IK_ObjC)
1040      .Case("c++-header", IK_CXX)
1041      .Case("objective-c++-header", IK_ObjCXX)
1042      .Cases("ast", "pcm", IK_AST)
1043      .Case("ir", IK_LLVM_IR)
1044      .Default(IK_None);
1045    if (DashX == IK_None)
1046      Diags.Report(diag::err_drv_invalid_value)
1047        << A->getAsString(Args) << A->getValue();
1048  }
1049
1050  // '-' is the default input if none is given.
1051  std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
1052  Opts.Inputs.clear();
1053  if (Inputs.empty())
1054    Inputs.push_back("-");
1055  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1056    InputKind IK = DashX;
1057    if (IK == IK_None) {
1058      IK = FrontendOptions::getInputKindForExtension(
1059        StringRef(Inputs[i]).rsplit('.').second);
1060      // FIXME: Remove this hack.
1061      if (i == 0)
1062        DashX = IK;
1063    }
1064    Opts.Inputs.emplace_back(std::move(Inputs[i]), IK);
1065  }
1066
1067  return DashX;
1068}
1069
1070std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1071                                                 void *MainAddr) {
1072  std::string ClangExecutable =
1073      llvm::sys::fs::getMainExecutable(Argv0, MainAddr);
1074  StringRef Dir = llvm::sys::path::parent_path(ClangExecutable);
1075
1076  // Compute the path to the resource directory.
1077  StringRef ClangResourceDir(CLANG_RESOURCE_DIR);
1078  SmallString<128> P(Dir);
1079  if (ClangResourceDir != "") {
1080    llvm::sys::path::append(P, ClangResourceDir);
1081  } else {
1082    StringRef ClangLibdirSuffix(CLANG_LIBDIR_SUFFIX);
1083    llvm::sys::path::append(P, "..", Twine("lib") + ClangLibdirSuffix, "clang",
1084                            CLANG_VERSION_STRING);
1085  }
1086
1087  return P.str();
1088}
1089
1090static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1091  using namespace options;
1092  Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
1093  Opts.Verbose = Args.hasArg(OPT_v);
1094  Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1095  Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
1096  Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1097  if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
1098    Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
1099  Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
1100  Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodules_cache_path);
1101  Opts.ModuleUserBuildPath = Args.getLastArgValue(OPT_fmodules_user_build_path);
1102  Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
1103  Opts.ImplicitModuleMaps = Args.hasArg(OPT_fimplicit_module_maps);
1104  Opts.ModuleMapFileHomeIsCwd = Args.hasArg(OPT_fmodule_map_file_home_is_cwd);
1105  Opts.ModuleCachePruneInterval =
1106      getLastArgIntValue(Args, OPT_fmodules_prune_interval, 7 * 24 * 60 * 60);
1107  Opts.ModuleCachePruneAfter =
1108      getLastArgIntValue(Args, OPT_fmodules_prune_after, 31 * 24 * 60 * 60);
1109  Opts.ModulesValidateOncePerBuildSession =
1110      Args.hasArg(OPT_fmodules_validate_once_per_build_session);
1111  Opts.BuildSessionTimestamp =
1112      getLastArgUInt64Value(Args, OPT_fbuild_session_timestamp, 0);
1113  Opts.ModulesValidateSystemHeaders =
1114      Args.hasArg(OPT_fmodules_validate_system_headers);
1115  if (const Arg *A = Args.getLastArg(OPT_fmodule_format_EQ))
1116    Opts.ModuleFormat = A->getValue();
1117
1118  for (const Arg *A : Args.filtered(OPT_fmodules_ignore_macro)) {
1119    StringRef MacroDef = A->getValue();
1120    Opts.ModulesIgnoreMacros.insert(MacroDef.split('=').first);
1121  }
1122
1123  // Add -I..., -F..., and -index-header-map options in order.
1124  bool IsIndexHeaderMap = false;
1125  for (const Arg *A : Args.filtered(OPT_I, OPT_F, OPT_index_header_map)) {
1126    if (A->getOption().matches(OPT_index_header_map)) {
1127      // -index-header-map applies to the next -I or -F.
1128      IsIndexHeaderMap = true;
1129      continue;
1130    }
1131
1132    frontend::IncludeDirGroup Group =
1133        IsIndexHeaderMap ? frontend::IndexHeaderMap : frontend::Angled;
1134
1135    Opts.AddPath(A->getValue(), Group,
1136                 /*IsFramework=*/A->getOption().matches(OPT_F), true);
1137    IsIndexHeaderMap = false;
1138  }
1139
1140  // Add -iprefix/-iwithprefix/-iwithprefixbefore options.
1141  StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1142  for (const Arg *A :
1143       Args.filtered(OPT_iprefix, OPT_iwithprefix, OPT_iwithprefixbefore)) {
1144    if (A->getOption().matches(OPT_iprefix))
1145      Prefix = A->getValue();
1146    else if (A->getOption().matches(OPT_iwithprefix))
1147      Opts.AddPath(Prefix.str() + A->getValue(), frontend::After, false, true);
1148    else
1149      Opts.AddPath(Prefix.str() + A->getValue(), frontend::Angled, false, true);
1150  }
1151
1152  for (const Arg *A : Args.filtered(OPT_idirafter))
1153    Opts.AddPath(A->getValue(), frontend::After, false, true);
1154  for (const Arg *A : Args.filtered(OPT_iquote))
1155    Opts.AddPath(A->getValue(), frontend::Quoted, false, true);
1156  for (const Arg *A : Args.filtered(OPT_isystem, OPT_iwithsysroot))
1157    Opts.AddPath(A->getValue(), frontend::System, false,
1158                 !A->getOption().matches(OPT_iwithsysroot));
1159  for (const Arg *A : Args.filtered(OPT_iframework))
1160    Opts.AddPath(A->getValue(), frontend::System, true, true);
1161
1162  // Add the paths for the various language specific isystem flags.
1163  for (const Arg *A : Args.filtered(OPT_c_isystem))
1164    Opts.AddPath(A->getValue(), frontend::CSystem, false, true);
1165  for (const Arg *A : Args.filtered(OPT_cxx_isystem))
1166    Opts.AddPath(A->getValue(), frontend::CXXSystem, false, true);
1167  for (const Arg *A : Args.filtered(OPT_objc_isystem))
1168    Opts.AddPath(A->getValue(), frontend::ObjCSystem, false,true);
1169  for (const Arg *A : Args.filtered(OPT_objcxx_isystem))
1170    Opts.AddPath(A->getValue(), frontend::ObjCXXSystem, false, true);
1171
1172  // Add the internal paths from a driver that detects standard include paths.
1173  for (const Arg *A :
1174       Args.filtered(OPT_internal_isystem, OPT_internal_externc_isystem)) {
1175    frontend::IncludeDirGroup Group = frontend::System;
1176    if (A->getOption().matches(OPT_internal_externc_isystem))
1177      Group = frontend::ExternCSystem;
1178    Opts.AddPath(A->getValue(), Group, false, true);
1179  }
1180
1181  // Add the path prefixes which are implicitly treated as being system headers.
1182  for (const Arg *A :
1183       Args.filtered(OPT_system_header_prefix, OPT_no_system_header_prefix))
1184    Opts.AddSystemHeaderPrefix(
1185        A->getValue(), A->getOption().matches(OPT_system_header_prefix));
1186
1187  for (const Arg *A : Args.filtered(OPT_ivfsoverlay))
1188    Opts.AddVFSOverlayFile(A->getValue());
1189}
1190
1191void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
1192                                         LangStandard::Kind LangStd) {
1193  // Set some properties which depend solely on the input kind; it would be nice
1194  // to move these to the language standard, and have the driver resolve the
1195  // input kind + language standard.
1196  if (IK == IK_Asm) {
1197    Opts.AsmPreprocessor = 1;
1198  } else if (IK == IK_ObjC ||
1199             IK == IK_ObjCXX ||
1200             IK == IK_PreprocessedObjC ||
1201             IK == IK_PreprocessedObjCXX) {
1202    Opts.ObjC1 = Opts.ObjC2 = 1;
1203  }
1204
1205  if (LangStd == LangStandard::lang_unspecified) {
1206    // Based on the base language, pick one.
1207    switch (IK) {
1208    case IK_None:
1209    case IK_AST:
1210    case IK_LLVM_IR:
1211      llvm_unreachable("Invalid input kind!");
1212    case IK_OpenCL:
1213      LangStd = LangStandard::lang_opencl;
1214      break;
1215    case IK_CUDA:
1216    case IK_PreprocessedCuda:
1217      LangStd = LangStandard::lang_cuda;
1218      break;
1219    case IK_Asm:
1220    case IK_C:
1221    case IK_PreprocessedC:
1222    case IK_ObjC:
1223    case IK_PreprocessedObjC:
1224      LangStd = LangStandard::lang_gnu11;
1225      break;
1226    case IK_CXX:
1227    case IK_PreprocessedCXX:
1228    case IK_ObjCXX:
1229    case IK_PreprocessedObjCXX:
1230      LangStd = LangStandard::lang_gnucxx98;
1231      break;
1232    }
1233  }
1234
1235  const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1236  Opts.LineComment = Std.hasLineComments();
1237  Opts.C99 = Std.isC99();
1238  Opts.C11 = Std.isC11();
1239  Opts.CPlusPlus = Std.isCPlusPlus();
1240  Opts.CPlusPlus11 = Std.isCPlusPlus11();
1241  Opts.CPlusPlus14 = Std.isCPlusPlus14();
1242  Opts.CPlusPlus1z = Std.isCPlusPlus1z();
1243  Opts.Digraphs = Std.hasDigraphs();
1244  Opts.GNUMode = Std.isGNUMode();
1245  Opts.GNUInline = Std.isC89();
1246  Opts.HexFloats = Std.hasHexFloats();
1247  Opts.ImplicitInt = Std.hasImplicitInt();
1248
1249  // Set OpenCL Version.
1250  Opts.OpenCL = LangStd == LangStandard::lang_opencl || IK == IK_OpenCL;
1251  if (LangStd == LangStandard::lang_opencl)
1252    Opts.OpenCLVersion = 100;
1253  else if (LangStd == LangStandard::lang_opencl11)
1254    Opts.OpenCLVersion = 110;
1255  else if (LangStd == LangStandard::lang_opencl12)
1256    Opts.OpenCLVersion = 120;
1257  else if (LangStd == LangStandard::lang_opencl20)
1258    Opts.OpenCLVersion = 200;
1259
1260  // OpenCL has some additional defaults.
1261  if (Opts.OpenCL) {
1262    Opts.AltiVec = 0;
1263    Opts.ZVector = 0;
1264    Opts.CXXOperatorNames = 1;
1265    Opts.LaxVectorConversions = 0;
1266    Opts.DefaultFPContract = 1;
1267    Opts.NativeHalfType = 1;
1268  }
1269
1270  Opts.CUDA = IK == IK_CUDA || IK == IK_PreprocessedCuda ||
1271              LangStd == LangStandard::lang_cuda;
1272
1273  // OpenCL and C++ both have bool, true, false keywords.
1274  Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1275
1276  // OpenCL has half keyword
1277  Opts.Half = Opts.OpenCL;
1278
1279  // C++ has wchar_t keyword.
1280  Opts.WChar = Opts.CPlusPlus;
1281
1282  Opts.GNUKeywords = Opts.GNUMode;
1283  Opts.CXXOperatorNames = Opts.CPlusPlus;
1284
1285  Opts.DollarIdents = !Opts.AsmPreprocessor;
1286}
1287
1288/// Attempt to parse a visibility value out of the given argument.
1289static Visibility parseVisibility(Arg *arg, ArgList &args,
1290                                  DiagnosticsEngine &diags) {
1291  StringRef value = arg->getValue();
1292  if (value == "default") {
1293    return DefaultVisibility;
1294  } else if (value == "hidden") {
1295    return HiddenVisibility;
1296  } else if (value == "protected") {
1297    // FIXME: diagnose if target does not support protected visibility
1298    return ProtectedVisibility;
1299  }
1300
1301  diags.Report(diag::err_drv_invalid_value)
1302    << arg->getAsString(args) << value;
1303  return DefaultVisibility;
1304}
1305
1306static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1307                          DiagnosticsEngine &Diags) {
1308  // FIXME: Cleanup per-file based stuff.
1309  LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1310  if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1311    LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1312#define LANGSTANDARD(id, name, desc, features) \
1313      .Case(name, LangStandard::lang_##id)
1314#include "clang/Frontend/LangStandards.def"
1315      .Default(LangStandard::lang_unspecified);
1316    if (LangStd == LangStandard::lang_unspecified)
1317      Diags.Report(diag::err_drv_invalid_value)
1318        << A->getAsString(Args) << A->getValue();
1319    else {
1320      // Valid standard, check to make sure language and standard are
1321      // compatible.
1322      const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1323      switch (IK) {
1324      case IK_C:
1325      case IK_ObjC:
1326      case IK_PreprocessedC:
1327      case IK_PreprocessedObjC:
1328        if (!(Std.isC89() || Std.isC99()))
1329          Diags.Report(diag::err_drv_argument_not_allowed_with)
1330            << A->getAsString(Args) << "C/ObjC";
1331        break;
1332      case IK_CXX:
1333      case IK_ObjCXX:
1334      case IK_PreprocessedCXX:
1335      case IK_PreprocessedObjCXX:
1336        if (!Std.isCPlusPlus())
1337          Diags.Report(diag::err_drv_argument_not_allowed_with)
1338            << A->getAsString(Args) << "C++/ObjC++";
1339        break;
1340      case IK_OpenCL:
1341        if (!Std.isC99())
1342          Diags.Report(diag::err_drv_argument_not_allowed_with)
1343            << A->getAsString(Args) << "OpenCL";
1344        break;
1345      case IK_CUDA:
1346      case IK_PreprocessedCuda:
1347        if (!Std.isCPlusPlus())
1348          Diags.Report(diag::err_drv_argument_not_allowed_with)
1349            << A->getAsString(Args) << "CUDA";
1350        break;
1351      default:
1352        break;
1353      }
1354    }
1355  }
1356
1357  // -cl-std only applies for OpenCL language standards.
1358  // Override the -std option in this case.
1359  if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1360    LangStandard::Kind OpenCLLangStd
1361    = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1362    .Case("CL", LangStandard::lang_opencl)
1363    .Case("CL1.1", LangStandard::lang_opencl11)
1364    .Case("CL1.2", LangStandard::lang_opencl12)
1365    .Case("CL2.0", LangStandard::lang_opencl20)
1366    .Default(LangStandard::lang_unspecified);
1367
1368    if (OpenCLLangStd == LangStandard::lang_unspecified) {
1369      Diags.Report(diag::err_drv_invalid_value)
1370      << A->getAsString(Args) << A->getValue();
1371    }
1372    else
1373      LangStd = OpenCLLangStd;
1374  }
1375
1376  CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1377
1378  // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1379  // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1380  // while a subset (the non-C++ GNU keywords) is provided by GCC's
1381  // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1382  // name, as it doesn't seem a useful distinction.
1383  Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1384                                  Opts.GNUKeywords);
1385
1386  if (Args.hasArg(OPT_fno_operator_names))
1387    Opts.CXXOperatorNames = 0;
1388
1389  if (Args.hasArg(OPT_fcuda_is_device))
1390    Opts.CUDAIsDevice = 1;
1391
1392  if (Args.hasArg(OPT_fcuda_allow_host_calls_from_host_device))
1393    Opts.CUDAAllowHostCallsFromHostDevice = 1;
1394
1395  if (Args.hasArg(OPT_fcuda_disable_target_call_checks))
1396    Opts.CUDADisableTargetCallChecks = 1;
1397
1398  if (Opts.ObjC1) {
1399    if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1400      StringRef value = arg->getValue();
1401      if (Opts.ObjCRuntime.tryParse(value))
1402        Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1403    }
1404
1405    if (Args.hasArg(OPT_fobjc_gc_only))
1406      Opts.setGC(LangOptions::GCOnly);
1407    else if (Args.hasArg(OPT_fobjc_gc))
1408      Opts.setGC(LangOptions::HybridGC);
1409    else if (Args.hasArg(OPT_fobjc_arc)) {
1410      Opts.ObjCAutoRefCount = 1;
1411      if (!Opts.ObjCRuntime.allowsARC())
1412        Diags.Report(diag::err_arc_unsupported_on_runtime);
1413
1414      // Only set ObjCARCWeak if ARC is enabled.
1415      if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1416        Opts.ObjCARCWeak = 1;
1417      else
1418        Opts.ObjCARCWeak = Opts.ObjCRuntime.allowsWeak();
1419    }
1420
1421    if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1422      Opts.ObjCInferRelatedResultType = 0;
1423
1424    if (Args.hasArg(OPT_fobjc_subscripting_legacy_runtime))
1425      Opts.ObjCSubscriptingLegacyRuntime =
1426        (Opts.ObjCRuntime.getKind() == ObjCRuntime::FragileMacOSX);
1427  }
1428
1429  if (Args.hasArg(OPT_fgnu89_inline)) {
1430    if (Opts.CPlusPlus)
1431      Diags.Report(diag::err_drv_argument_not_allowed_with) << "-fgnu89-inline"
1432                                                            << "C++/ObjC++";
1433    else
1434      Opts.GNUInline = 1;
1435  }
1436
1437  if (Args.hasArg(OPT_fapple_kext)) {
1438    if (!Opts.CPlusPlus)
1439      Diags.Report(diag::warn_c_kext);
1440    else
1441      Opts.AppleKext = 1;
1442  }
1443
1444  if (Args.hasArg(OPT_print_ivar_layout))
1445    Opts.ObjCGCBitmapPrint = 1;
1446  if (Args.hasArg(OPT_fno_constant_cfstrings))
1447    Opts.NoConstantCFStrings = 1;
1448
1449  if (Args.hasArg(OPT_faltivec))
1450    Opts.AltiVec = 1;
1451
1452  if (Args.hasArg(OPT_fzvector))
1453    Opts.ZVector = 1;
1454
1455  if (Args.hasArg(OPT_pthread))
1456    Opts.POSIXThreads = 1;
1457
1458  // The value-visibility mode defaults to "default".
1459  if (Arg *visOpt = Args.getLastArg(OPT_fvisibility)) {
1460    Opts.setValueVisibilityMode(parseVisibility(visOpt, Args, Diags));
1461  } else {
1462    Opts.setValueVisibilityMode(DefaultVisibility);
1463  }
1464
1465  // The type-visibility mode defaults to the value-visibility mode.
1466  if (Arg *typeVisOpt = Args.getLastArg(OPT_ftype_visibility)) {
1467    Opts.setTypeVisibilityMode(parseVisibility(typeVisOpt, Args, Diags));
1468  } else {
1469    Opts.setTypeVisibilityMode(Opts.getValueVisibilityMode());
1470  }
1471
1472  if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1473    Opts.InlineVisibilityHidden = 1;
1474
1475  if (Args.hasArg(OPT_ftrapv)) {
1476    Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1477    // Set the handler, if one is specified.
1478    Opts.OverflowHandler =
1479        Args.getLastArgValue(OPT_ftrapv_handler);
1480  }
1481  else if (Args.hasArg(OPT_fwrapv))
1482    Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1483
1484  Opts.MSVCCompat = Args.hasArg(OPT_fms_compatibility);
1485  Opts.MicrosoftExt = Opts.MSVCCompat || Args.hasArg(OPT_fms_extensions);
1486  Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
1487  Opts.MSCompatibilityVersion = 0;
1488  if (const Arg *A = Args.getLastArg(OPT_fms_compatibility_version)) {
1489    VersionTuple VT;
1490    if (VT.tryParse(A->getValue()))
1491      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
1492                                                << A->getValue();
1493    Opts.MSCompatibilityVersion = VT.getMajor() * 10000000 +
1494                                  VT.getMinor().getValueOr(0) * 100000 +
1495                                  VT.getSubminor().getValueOr(0);
1496  }
1497
1498  // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1499  // is specified, or -std is set to a conforming mode.
1500  // Trigraphs are disabled by default in c++1z onwards.
1501  Opts.Trigraphs = !Opts.GNUMode && !Opts.MSVCCompat && !Opts.CPlusPlus1z;
1502  Opts.Trigraphs =
1503      Args.hasFlag(OPT_ftrigraphs, OPT_fno_trigraphs, Opts.Trigraphs);
1504
1505  Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1506                                   OPT_fno_dollars_in_identifiers,
1507                                   Opts.DollarIdents);
1508  Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1509  Opts.VtorDispMode = getLastArgIntValue(Args, OPT_vtordisp_mode_EQ, 1, Diags);
1510  Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1511  Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1512  Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
1513                                   Opts.ConstStrings);
1514  if (Args.hasArg(OPT_fno_lax_vector_conversions))
1515    Opts.LaxVectorConversions = 0;
1516  if (Args.hasArg(OPT_fno_threadsafe_statics))
1517    Opts.ThreadsafeStatics = 0;
1518  Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1519  Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
1520  Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
1521  Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1522  Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
1523
1524  Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1525  Opts.RTTIData = Opts.RTTI && !Args.hasArg(OPT_fno_rtti_data);
1526  Opts.Blocks = Args.hasArg(OPT_fblocks);
1527  Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
1528  Opts.Modules = Args.hasArg(OPT_fmodules);
1529  Opts.ModulesStrictDeclUse = Args.hasArg(OPT_fmodules_strict_decluse);
1530  Opts.ModulesDeclUse =
1531      Args.hasArg(OPT_fmodules_decluse) || Opts.ModulesStrictDeclUse;
1532  Opts.ModulesLocalVisibility =
1533      Args.hasArg(OPT_fmodules_local_submodule_visibility);
1534  Opts.ModulesHideInternalLinkage =
1535      !Args.hasArg(OPT_fno_modules_hide_internal_linkage);
1536  Opts.ModulesSearchAll = Opts.Modules &&
1537    !Args.hasArg(OPT_fno_modules_search_all) &&
1538    Args.hasArg(OPT_fmodules_search_all);
1539  Opts.ModulesErrorRecovery = !Args.hasArg(OPT_fno_modules_error_recovery);
1540  Opts.ImplicitModules = !Args.hasArg(OPT_fno_implicit_modules);
1541  Opts.CharIsSigned = Opts.OpenCL || !Args.hasArg(OPT_fno_signed_char);
1542  Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
1543  Opts.ShortWChar = Args.hasFlag(OPT_fshort_wchar, OPT_fno_short_wchar, false);
1544  Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1545  Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1546  Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1547  Opts.NoMathBuiltin = Args.hasArg(OPT_fno_math_builtin);
1548  Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1549  Opts.SizedDeallocation = Args.hasArg(OPT_fsized_deallocation);
1550  Opts.ConceptsTS = Args.hasArg(OPT_fconcepts_ts);
1551  Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1552  Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1553  Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1554  Opts.MathErrno = !Opts.OpenCL && Args.hasArg(OPT_fmath_errno);
1555  Opts.InstantiationDepth =
1556      getLastArgIntValue(Args, OPT_ftemplate_depth, 256, Diags);
1557  Opts.ArrowDepth =
1558      getLastArgIntValue(Args, OPT_foperator_arrow_depth, 256, Diags);
1559  Opts.ConstexprCallDepth =
1560      getLastArgIntValue(Args, OPT_fconstexpr_depth, 512, Diags);
1561  Opts.ConstexprStepLimit =
1562      getLastArgIntValue(Args, OPT_fconstexpr_steps, 1048576, Diags);
1563  Opts.BracketDepth = getLastArgIntValue(Args, OPT_fbracket_depth, 256, Diags);
1564  Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
1565  Opts.NumLargeByValueCopy =
1566      getLastArgIntValue(Args, OPT_Wlarge_by_value_copy_EQ, 0, Diags);
1567  Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
1568  Opts.ObjCConstantStringClass =
1569    Args.getLastArgValue(OPT_fconstant_string_class);
1570  Opts.ObjCDefaultSynthProperties =
1571    !Args.hasArg(OPT_disable_objc_default_synthesize_properties);
1572  Opts.EncodeExtendedBlockSig =
1573    Args.hasArg(OPT_fencode_extended_block_signature);
1574  Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1575  Opts.PackStruct = getLastArgIntValue(Args, OPT_fpack_struct_EQ, 0, Diags);
1576  Opts.MaxTypeAlign = getLastArgIntValue(Args, OPT_fmax_type_align_EQ, 0, Diags);
1577  Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
1578  Opts.PIELevel = getLastArgIntValue(Args, OPT_pie_level, 0, Diags);
1579  Opts.Static = Args.hasArg(OPT_static_define);
1580  Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
1581  Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
1582                        || Args.hasArg(OPT_fdump_record_layouts);
1583  Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1584  Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1585  Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1586  Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
1587  Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
1588  Opts.MRTD = Args.hasArg(OPT_mrtd);
1589  Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
1590  Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
1591  Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
1592  Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
1593  Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
1594  Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
1595  Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
1596  Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
1597  Opts.AppExt = Args.hasArg(OPT_fapplication_extension);
1598  Opts.ImplementationOfModule =
1599      Args.getLastArgValue(OPT_fmodule_implementation_of);
1600  Opts.ModuleFeatures = Args.getAllArgValues(OPT_fmodule_feature);
1601  std::sort(Opts.ModuleFeatures.begin(), Opts.ModuleFeatures.end());
1602  Opts.NativeHalfType |= Args.hasArg(OPT_fnative_half_type);
1603  Opts.HalfArgsAndReturns = Args.hasArg(OPT_fallow_half_arguments_and_returns);
1604  Opts.GNUAsm = !Args.hasArg(OPT_fno_gnu_inline_asm);
1605
1606  if (!Opts.CurrentModule.empty() && !Opts.ImplementationOfModule.empty() &&
1607      Opts.CurrentModule != Opts.ImplementationOfModule) {
1608    Diags.Report(diag::err_conflicting_module_names)
1609        << Opts.CurrentModule << Opts.ImplementationOfModule;
1610  }
1611
1612  // For now, we only support local submodule visibility in C++ (because we
1613  // heavily depend on the ODR for merging redefinitions).
1614  if (Opts.ModulesLocalVisibility && !Opts.CPlusPlus)
1615    Diags.Report(diag::err_drv_argument_not_allowed_with)
1616        << "-fmodules-local-submodule-visibility" << "C";
1617
1618  if (Arg *A = Args.getLastArg(OPT_faddress_space_map_mangling_EQ)) {
1619    switch (llvm::StringSwitch<unsigned>(A->getValue())
1620      .Case("target", LangOptions::ASMM_Target)
1621      .Case("no", LangOptions::ASMM_Off)
1622      .Case("yes", LangOptions::ASMM_On)
1623      .Default(255)) {
1624    default:
1625      Diags.Report(diag::err_drv_invalid_value)
1626        << "-faddress-space-map-mangling=" << A->getValue();
1627      break;
1628    case LangOptions::ASMM_Target:
1629      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Target);
1630      break;
1631    case LangOptions::ASMM_On:
1632      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_On);
1633      break;
1634    case LangOptions::ASMM_Off:
1635      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Off);
1636      break;
1637    }
1638  }
1639
1640  if (Arg *A = Args.getLastArg(OPT_fms_memptr_rep_EQ)) {
1641    LangOptions::PragmaMSPointersToMembersKind InheritanceModel =
1642        llvm::StringSwitch<LangOptions::PragmaMSPointersToMembersKind>(
1643            A->getValue())
1644            .Case("single",
1645                  LangOptions::PPTMK_FullGeneralitySingleInheritance)
1646            .Case("multiple",
1647                  LangOptions::PPTMK_FullGeneralityMultipleInheritance)
1648            .Case("virtual",
1649                  LangOptions::PPTMK_FullGeneralityVirtualInheritance)
1650            .Default(LangOptions::PPTMK_BestCase);
1651    if (InheritanceModel == LangOptions::PPTMK_BestCase)
1652      Diags.Report(diag::err_drv_invalid_value)
1653          << "-fms-memptr-rep=" << A->getValue();
1654
1655    Opts.setMSPointerToMemberRepresentationMethod(InheritanceModel);
1656  }
1657
1658  // Check if -fopenmp is specified.
1659  Opts.OpenMP = Args.hasArg(options::OPT_fopenmp);
1660  Opts.OpenMPUseTLS =
1661      Opts.OpenMP && !Args.hasArg(options::OPT_fnoopenmp_use_tls);
1662
1663  // Record whether the __DEPRECATED define was requested.
1664  Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
1665                                 OPT_fno_deprecated_macro,
1666                                 Opts.Deprecated);
1667
1668  // FIXME: Eliminate this dependency.
1669  unsigned Opt = getOptimizationLevel(Args, IK, Diags),
1670       OptSize = getOptimizationLevelSize(Args);
1671  Opts.Optimize = Opt != 0;
1672  Opts.OptimizeSize = OptSize != 0;
1673
1674  // This is the __NO_INLINE__ define, which just depends on things like the
1675  // optimization level and -fno-inline, not actually whether the backend has
1676  // inlining enabled.
1677  Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
1678
1679  Opts.FastMath = Args.hasArg(OPT_ffast_math) ||
1680      Args.hasArg(OPT_cl_fast_relaxed_math);
1681  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only) ||
1682      Args.hasArg(OPT_cl_finite_math_only) ||
1683      Args.hasArg(OPT_cl_fast_relaxed_math);
1684
1685  Opts.RetainCommentsFromSystemHeaders =
1686      Args.hasArg(OPT_fretain_comments_from_system_headers);
1687
1688  unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
1689  switch (SSP) {
1690  default:
1691    Diags.Report(diag::err_drv_invalid_value)
1692      << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1693    break;
1694  case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
1695  case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
1696  case 2: Opts.setStackProtector(LangOptions::SSPStrong); break;
1697  case 3: Opts.setStackProtector(LangOptions::SSPReq); break;
1698  }
1699
1700  // Parse -fsanitize= arguments.
1701  parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
1702                      Diags, Opts.Sanitize);
1703  // -fsanitize-address-field-padding=N has to be a LangOpt, parse it here.
1704  Opts.SanitizeAddressFieldPadding =
1705      getLastArgIntValue(Args, OPT_fsanitize_address_field_padding, 0, Diags);
1706  Opts.SanitizerBlacklistFiles = Args.getAllArgValues(OPT_fsanitize_blacklist);
1707}
1708
1709static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1710                                  FileManager &FileMgr,
1711                                  DiagnosticsEngine &Diags) {
1712  using namespace options;
1713  Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1714  Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1715  if (const Arg *A = Args.getLastArg(OPT_token_cache))
1716      Opts.TokenCache = A->getValue();
1717  else
1718    Opts.TokenCache = Opts.ImplicitPTHInclude;
1719  Opts.UsePredefines = !Args.hasArg(OPT_undef);
1720  Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1721  Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1722
1723  Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
1724  for (const Arg *A : Args.filtered(OPT_error_on_deserialized_pch_decl))
1725    Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
1726
1727  if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1728    StringRef Value(A->getValue());
1729    size_t Comma = Value.find(',');
1730    unsigned Bytes = 0;
1731    unsigned EndOfLine = 0;
1732
1733    if (Comma == StringRef::npos ||
1734        Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1735        Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1736      Diags.Report(diag::err_drv_preamble_format);
1737    else {
1738      Opts.PrecompiledPreambleBytes.first = Bytes;
1739      Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1740    }
1741  }
1742
1743  // Add macros from the command line.
1744  for (const Arg *A : Args.filtered(OPT_D, OPT_U)) {
1745    if (A->getOption().matches(OPT_D))
1746      Opts.addMacroDef(A->getValue());
1747    else
1748      Opts.addMacroUndef(A->getValue());
1749  }
1750
1751  Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1752
1753  // Add the ordered list of -includes.
1754  for (const Arg *A : Args.filtered(OPT_include))
1755    Opts.Includes.emplace_back(A->getValue());
1756
1757  for (const Arg *A : Args.filtered(OPT_chain_include))
1758    Opts.ChainedIncludes.emplace_back(A->getValue());
1759
1760  // Include 'altivec.h' if -faltivec option present
1761  if (Args.hasArg(OPT_faltivec))
1762    Opts.Includes.emplace_back("altivec.h");
1763
1764  for (const Arg *A : Args.filtered(OPT_remap_file)) {
1765    std::pair<StringRef, StringRef> Split = StringRef(A->getValue()).split(';');
1766
1767    if (Split.second.empty()) {
1768      Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1769      continue;
1770    }
1771
1772    Opts.addRemappedFile(Split.first, Split.second);
1773  }
1774
1775  if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
1776    StringRef Name = A->getValue();
1777    unsigned Library = llvm::StringSwitch<unsigned>(Name)
1778      .Case("libc++", ARCXX_libcxx)
1779      .Case("libstdc++", ARCXX_libstdcxx)
1780      .Case("none", ARCXX_nolib)
1781      .Default(~0U);
1782    if (Library == ~0U)
1783      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1784    else
1785      Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
1786  }
1787}
1788
1789static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1790                                        ArgList &Args,
1791                                        frontend::ActionKind Action) {
1792  using namespace options;
1793
1794  switch (Action) {
1795  case frontend::ASTDeclList:
1796  case frontend::ASTDump:
1797  case frontend::ASTPrint:
1798  case frontend::ASTView:
1799  case frontend::EmitAssembly:
1800  case frontend::EmitBC:
1801  case frontend::EmitHTML:
1802  case frontend::EmitLLVM:
1803  case frontend::EmitLLVMOnly:
1804  case frontend::EmitCodeGenOnly:
1805  case frontend::EmitObj:
1806  case frontend::FixIt:
1807  case frontend::GenerateModule:
1808  case frontend::GeneratePCH:
1809  case frontend::GeneratePTH:
1810  case frontend::ParseSyntaxOnly:
1811  case frontend::ModuleFileInfo:
1812  case frontend::VerifyPCH:
1813  case frontend::PluginAction:
1814  case frontend::PrintDeclContext:
1815  case frontend::RewriteObjC:
1816  case frontend::RewriteTest:
1817  case frontend::RunAnalysis:
1818  case frontend::MigrateSource:
1819    Opts.ShowCPP = 0;
1820    break;
1821
1822  case frontend::DumpRawTokens:
1823  case frontend::DumpTokens:
1824  case frontend::InitOnly:
1825  case frontend::PrintPreamble:
1826  case frontend::PrintPreprocessedInput:
1827  case frontend::RewriteMacros:
1828  case frontend::RunPreprocessorOnly:
1829    Opts.ShowCPP = !Args.hasArg(OPT_dM);
1830    break;
1831  }
1832
1833  Opts.ShowComments = Args.hasArg(OPT_C);
1834  Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1835  Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1836  Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1837  Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
1838  Opts.UseLineDirectives = Args.hasArg(OPT_fuse_line_directives);
1839}
1840
1841static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1842  using namespace options;
1843  Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1844  Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1845  Opts.FPMath = Args.getLastArgValue(OPT_mfpmath);
1846  Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
1847  Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1848  Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1849  Opts.Reciprocals = Args.getAllArgValues(OPT_mrecip_EQ);
1850  // Use the default target triple if unspecified.
1851  if (Opts.Triple.empty())
1852    Opts.Triple = llvm::sys::getDefaultTargetTriple();
1853}
1854
1855bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1856                                        const char *const *ArgBegin,
1857                                        const char *const *ArgEnd,
1858                                        DiagnosticsEngine &Diags) {
1859  bool Success = true;
1860
1861  // Parse the arguments.
1862  std::unique_ptr<OptTable> Opts(createDriverOptTable());
1863  const unsigned IncludedFlagsBitmask = options::CC1Option;
1864  unsigned MissingArgIndex, MissingArgCount;
1865  InputArgList Args =
1866      Opts->ParseArgs(llvm::makeArrayRef(ArgBegin, ArgEnd), MissingArgIndex,
1867                      MissingArgCount, IncludedFlagsBitmask);
1868
1869  // Check for missing argument error.
1870  if (MissingArgCount) {
1871    Diags.Report(diag::err_drv_missing_argument)
1872        << Args.getArgString(MissingArgIndex) << MissingArgCount;
1873    Success = false;
1874  }
1875
1876  // Issue errors on unknown arguments.
1877  for (const Arg *A : Args.filtered(OPT_UNKNOWN)) {
1878    Diags.Report(diag::err_drv_unknown_argument) << A->getAsString(Args);
1879    Success = false;
1880  }
1881
1882  Success &= ParseAnalyzerArgs(*Res.getAnalyzerOpts(), Args, Diags);
1883  Success &= ParseMigratorArgs(Res.getMigratorOpts(), Args);
1884  ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), Args);
1885  Success &= ParseDiagnosticArgs(Res.getDiagnosticOpts(), Args, &Diags);
1886  ParseCommentArgs(Res.getLangOpts()->CommentOpts, Args);
1887  ParseFileSystemArgs(Res.getFileSystemOpts(), Args);
1888  // FIXME: We shouldn't have to pass the DashX option around here
1889  InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), Args, Diags);
1890  ParseTargetArgs(Res.getTargetOpts(), Args);
1891  Success &= ParseCodeGenArgs(Res.getCodeGenOpts(), Args, DashX, Diags,
1892                              Res.getTargetOpts());
1893  ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), Args);
1894  if (DashX != IK_AST && DashX != IK_LLVM_IR) {
1895    ParseLangArgs(*Res.getLangOpts(), Args, DashX, Diags);
1896    if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
1897      Res.getLangOpts()->ObjCExceptions = 1;
1898  }
1899  // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
1900  // PCH file and find the original header name. Remove the need to do that in
1901  // ParsePreprocessorArgs and remove the FileManager
1902  // parameters from the function and the "FileManager.h" #include.
1903  FileManager FileMgr(Res.getFileSystemOpts());
1904  ParsePreprocessorArgs(Res.getPreprocessorOpts(), Args, FileMgr, Diags);
1905  ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), Args,
1906                              Res.getFrontendOpts().ProgramAction);
1907  return Success;
1908}
1909
1910namespace {
1911
1912  class ModuleSignature {
1913    SmallVector<uint64_t, 16> Data;
1914    unsigned CurBit;
1915    uint64_t CurValue;
1916
1917  public:
1918    ModuleSignature() : CurBit(0), CurValue(0) { }
1919
1920    void add(uint64_t Value, unsigned Bits);
1921    void add(StringRef Value);
1922    void flush();
1923
1924    llvm::APInt getAsInteger() const;
1925  };
1926}
1927
1928void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
1929  CurValue |= Value << CurBit;
1930  if (CurBit + NumBits < 64) {
1931    CurBit += NumBits;
1932    return;
1933  }
1934
1935  // Add the current word.
1936  Data.push_back(CurValue);
1937
1938  if (CurBit)
1939    CurValue = Value >> (64-CurBit);
1940  else
1941    CurValue = 0;
1942  CurBit = (CurBit+NumBits) & 63;
1943}
1944
1945void ModuleSignature::flush() {
1946  if (CurBit == 0)
1947    return;
1948
1949  Data.push_back(CurValue);
1950  CurBit = 0;
1951  CurValue = 0;
1952}
1953
1954void ModuleSignature::add(StringRef Value) {
1955  for (StringRef::iterator I = Value.begin(), IEnd = Value.end(); I != IEnd;++I)
1956    add(*I, 8);
1957}
1958
1959llvm::APInt ModuleSignature::getAsInteger() const {
1960  return llvm::APInt(Data.size() * 64, Data);
1961}
1962
1963std::string CompilerInvocation::getModuleHash() const {
1964  // Note: For QoI reasons, the things we use as a hash here should all be
1965  // dumped via the -module-info flag.
1966  using llvm::hash_code;
1967  using llvm::hash_value;
1968  using llvm::hash_combine;
1969
1970  // Start the signature with the compiler version.
1971  // FIXME: We'd rather use something more cryptographically sound than
1972  // CityHash, but this will do for now.
1973  hash_code code = hash_value(getClangFullRepositoryVersion());
1974
1975  // Extend the signature with the language options
1976#define LANGOPT(Name, Bits, Default, Description) \
1977   code = hash_combine(code, LangOpts->Name);
1978#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
1979  code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
1980#define BENIGN_LANGOPT(Name, Bits, Default, Description)
1981#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
1982#include "clang/Basic/LangOptions.def"
1983
1984  for (StringRef Feature : LangOpts->ModuleFeatures)
1985    code = hash_combine(code, Feature);
1986
1987  // Extend the signature with the target options.
1988  code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
1989                      TargetOpts->ABI);
1990  for (unsigned i = 0, n = TargetOpts->FeaturesAsWritten.size(); i != n; ++i)
1991    code = hash_combine(code, TargetOpts->FeaturesAsWritten[i]);
1992
1993  // Extend the signature with preprocessor options.
1994  const PreprocessorOptions &ppOpts = getPreprocessorOpts();
1995  const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
1996  code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
1997
1998  for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
1999            I = getPreprocessorOpts().Macros.begin(),
2000         IEnd = getPreprocessorOpts().Macros.end();
2001       I != IEnd; ++I) {
2002    // If we're supposed to ignore this macro for the purposes of modules,
2003    // don't put it into the hash.
2004    if (!hsOpts.ModulesIgnoreMacros.empty()) {
2005      // Check whether we're ignoring this macro.
2006      StringRef MacroDef = I->first;
2007      if (hsOpts.ModulesIgnoreMacros.count(MacroDef.split('=').first))
2008        continue;
2009    }
2010
2011    code = hash_combine(code, I->first, I->second);
2012  }
2013
2014  // Extend the signature with the sysroot.
2015  code = hash_combine(code, hsOpts.Sysroot, hsOpts.UseBuiltinIncludes,
2016                      hsOpts.UseStandardSystemIncludes,
2017                      hsOpts.UseStandardCXXIncludes,
2018                      hsOpts.UseLibcxx);
2019  code = hash_combine(code, hsOpts.ResourceDir);
2020
2021  // Extend the signature with the user build path.
2022  code = hash_combine(code, hsOpts.ModuleUserBuildPath);
2023
2024  // Darwin-specific hack: if we have a sysroot, use the contents and
2025  // modification time of
2026  //   $sysroot/System/Library/CoreServices/SystemVersion.plist
2027  // as part of the module hash.
2028  if (!hsOpts.Sysroot.empty()) {
2029    SmallString<128> systemVersionFile;
2030    systemVersionFile += hsOpts.Sysroot;
2031    llvm::sys::path::append(systemVersionFile, "System");
2032    llvm::sys::path::append(systemVersionFile, "Library");
2033    llvm::sys::path::append(systemVersionFile, "CoreServices");
2034    llvm::sys::path::append(systemVersionFile, "SystemVersion.plist");
2035
2036    llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> buffer =
2037        llvm::MemoryBuffer::getFile(systemVersionFile);
2038    if (buffer) {
2039      code = hash_combine(code, buffer.get()->getBuffer());
2040
2041      struct stat statBuf;
2042      if (stat(systemVersionFile.c_str(), &statBuf) == 0)
2043        code = hash_combine(code, statBuf.st_mtime);
2044    }
2045  }
2046
2047  return llvm::APInt(64, code).toString(36, /*Signed=*/false);
2048}
2049
2050namespace clang {
2051
2052template<typename IntTy>
2053static IntTy getLastArgIntValueImpl(const ArgList &Args, OptSpecifier Id,
2054                                    IntTy Default,
2055                                    DiagnosticsEngine *Diags) {
2056  IntTy Res = Default;
2057  if (Arg *A = Args.getLastArg(Id)) {
2058    if (StringRef(A->getValue()).getAsInteger(10, Res)) {
2059      if (Diags)
2060        Diags->Report(diag::err_drv_invalid_int_value) << A->getAsString(Args)
2061                                                       << A->getValue();
2062    }
2063  }
2064  return Res;
2065}
2066
2067
2068// Declared in clang/Frontend/Utils.h.
2069int getLastArgIntValue(const ArgList &Args, OptSpecifier Id, int Default,
2070                       DiagnosticsEngine *Diags) {
2071  return getLastArgIntValueImpl<int>(Args, Id, Default, Diags);
2072}
2073
2074uint64_t getLastArgUInt64Value(const ArgList &Args, OptSpecifier Id,
2075                               uint64_t Default,
2076                               DiagnosticsEngine *Diags) {
2077  return getLastArgIntValueImpl<uint64_t>(Args, Id, Default, Diags);
2078}
2079
2080void BuryPointer(const void *Ptr) {
2081  // This function may be called only a small fixed amount of times per each
2082  // invocation, otherwise we do actually have a leak which we want to report.
2083  // If this function is called more than kGraveYardMaxSize times, the pointers
2084  // will not be properly buried and a leak detector will report a leak, which
2085  // is what we want in such case.
2086  static const size_t kGraveYardMaxSize = 16;
2087  LLVM_ATTRIBUTE_UNUSED static const void *GraveYard[kGraveYardMaxSize];
2088  static std::atomic<unsigned> GraveYardSize;
2089  unsigned Idx = GraveYardSize++;
2090  if (Idx >= kGraveYardMaxSize)
2091    return;
2092  GraveYard[Idx] = Ptr;
2093}
2094
2095IntrusiveRefCntPtr<vfs::FileSystem>
2096createVFSFromCompilerInvocation(const CompilerInvocation &CI,
2097                                DiagnosticsEngine &Diags) {
2098  if (CI.getHeaderSearchOpts().VFSOverlayFiles.empty())
2099    return vfs::getRealFileSystem();
2100
2101  IntrusiveRefCntPtr<vfs::OverlayFileSystem>
2102    Overlay(new vfs::OverlayFileSystem(vfs::getRealFileSystem()));
2103  // earlier vfs files are on the bottom
2104  for (const std::string &File : CI.getHeaderSearchOpts().VFSOverlayFiles) {
2105    llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Buffer =
2106        llvm::MemoryBuffer::getFile(File);
2107    if (!Buffer) {
2108      Diags.Report(diag::err_missing_vfs_overlay_file) << File;
2109      return IntrusiveRefCntPtr<vfs::FileSystem>();
2110    }
2111
2112    IntrusiveRefCntPtr<vfs::FileSystem> FS =
2113        vfs::getVFSFromYAML(std::move(Buffer.get()), /*DiagHandler*/ nullptr);
2114    if (!FS.get()) {
2115      Diags.Report(diag::err_invalid_vfs_overlay) << File;
2116      return IntrusiveRefCntPtr<vfs::FileSystem>();
2117    }
2118    Overlay->pushOverlay(FS);
2119  }
2120  return Overlay;
2121}
2122} // end namespace clang
2123