CompilerInvocation.cpp revision 276479 
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/Driver/DriverDiagnostic.h"
14#include "clang/Driver/Options.h"
15#include "clang/Driver/Util.h"
16#include "clang/Frontend/FrontendDiagnostic.h"
17#include "clang/Frontend/LangStandard.h"
18#include "clang/Frontend/Utils.h"
19#include "clang/Lex/HeaderSearchOptions.h"
20#include "clang/Serialization/ASTReader.h"
21#include "llvm/ADT/Hashing.h"
22#include "llvm/ADT/SmallVector.h"
23#include "llvm/ADT/STLExtras.h"
24#include "llvm/ADT/StringExtras.h"
25#include "llvm/ADT/StringSwitch.h"
26#include "llvm/ADT/Triple.h"
27#include "llvm/Option/Arg.h"
28#include "llvm/Option/ArgList.h"
29#include "llvm/Option/OptTable.h"
30#include "llvm/Option/Option.h"
31#include "llvm/Support/CodeGen.h"
32#include "llvm/Support/ErrorHandling.h"
33#include "llvm/Support/FileSystem.h"
34#include "llvm/Support/Host.h"
35#include "llvm/Support/Path.h"
36#include "llvm/Support/Process.h"
37#include <atomic>
38#include <memory>
39#include <sys/stat.h>
40#include <system_error>
41using namespace clang;
42
43//===----------------------------------------------------------------------===//
44// Initialization.
45//===----------------------------------------------------------------------===//
46
47CompilerInvocationBase::CompilerInvocationBase()
48  : LangOpts(new LangOptions()), TargetOpts(new TargetOptions()),
49    DiagnosticOpts(new DiagnosticOptions()),
50    HeaderSearchOpts(new HeaderSearchOptions()),
51    PreprocessorOpts(new PreprocessorOptions()) {}
52
53CompilerInvocationBase::CompilerInvocationBase(const CompilerInvocationBase &X)
54  : RefCountedBase<CompilerInvocation>(),
55    LangOpts(new LangOptions(*X.getLangOpts())),
56    TargetOpts(new TargetOptions(X.getTargetOpts())),
57    DiagnosticOpts(new DiagnosticOptions(X.getDiagnosticOpts())),
58    HeaderSearchOpts(new HeaderSearchOptions(X.getHeaderSearchOpts())),
59    PreprocessorOpts(new PreprocessorOptions(X.getPreprocessorOpts())) {}
60
61CompilerInvocationBase::~CompilerInvocationBase() {}
62
63//===----------------------------------------------------------------------===//
64// Deserialization (from args)
65//===----------------------------------------------------------------------===//
66
67using namespace clang::driver;
68using namespace clang::driver::options;
69using namespace llvm::opt;
70
71//
72
73static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
74                                     DiagnosticsEngine &Diags) {
75  unsigned DefaultOpt = 0;
76  if (IK == IK_OpenCL && !Args.hasArg(OPT_cl_opt_disable))
77    DefaultOpt = 2;
78
79  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
80    if (A->getOption().matches(options::OPT_O0))
81      return 0;
82
83    if (A->getOption().matches(options::OPT_Ofast))
84      return 3;
85
86    assert (A->getOption().matches(options::OPT_O));
87
88    StringRef S(A->getValue());
89    if (S == "s" || S == "z" || S.empty())
90      return 2;
91
92    return getLastArgIntValue(Args, OPT_O, DefaultOpt, Diags);
93  }
94
95  return DefaultOpt;
96}
97
98static unsigned getOptimizationLevelSize(ArgList &Args) {
99  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
100    if (A->getOption().matches(options::OPT_O)) {
101      switch (A->getValue()[0]) {
102      default:
103        return 0;
104      case 's':
105        return 1;
106      case 'z':
107        return 2;
108      }
109    }
110  }
111  return 0;
112}
113
114static void addDiagnosticArgs(ArgList &Args, OptSpecifier Group,
115                              OptSpecifier GroupWithValue,
116                              std::vector<std::string> &Diagnostics) {
117  for (Arg *A : Args.filtered(Group)) {
118    if (A->getOption().getKind() == Option::FlagClass) {
119      // The argument is a pure flag (such as OPT_Wall or OPT_Wdeprecated). Add
120      // its name (minus the "W" or "R" at the beginning) to the warning list.
121      Diagnostics.push_back(A->getOption().getName().drop_front(1));
122    } else if (A->getOption().matches(GroupWithValue)) {
123      // This is -Wfoo= or -Rfoo=, where foo is the name of the diagnostic group.
124      Diagnostics.push_back(A->getOption().getName().drop_front(1).rtrim("=-"));
125    } else {
126      // Otherwise, add its value (for OPT_W_Joined and similar).
127      for (const char *Arg : A->getValues())
128        Diagnostics.push_back(Arg);
129    }
130  }
131}
132
133static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
134                              DiagnosticsEngine &Diags) {
135  using namespace options;
136  bool Success = true;
137  if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
138    StringRef Name = A->getValue();
139    AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
140#define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
141      .Case(CMDFLAG, NAME##Model)
142#include "clang/StaticAnalyzer/Core/Analyses.def"
143      .Default(NumStores);
144    if (Value == NumStores) {
145      Diags.Report(diag::err_drv_invalid_value)
146        << A->getAsString(Args) << Name;
147      Success = false;
148    } else {
149      Opts.AnalysisStoreOpt = Value;
150    }
151  }
152
153  if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
154    StringRef Name = A->getValue();
155    AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
156#define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
157      .Case(CMDFLAG, NAME##Model)
158#include "clang/StaticAnalyzer/Core/Analyses.def"
159      .Default(NumConstraints);
160    if (Value == NumConstraints) {
161      Diags.Report(diag::err_drv_invalid_value)
162        << A->getAsString(Args) << Name;
163      Success = false;
164    } else {
165      Opts.AnalysisConstraintsOpt = Value;
166    }
167  }
168
169  if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
170    StringRef Name = A->getValue();
171    AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
172#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN) \
173      .Case(CMDFLAG, PD_##NAME)
174#include "clang/StaticAnalyzer/Core/Analyses.def"
175      .Default(NUM_ANALYSIS_DIAG_CLIENTS);
176    if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
177      Diags.Report(diag::err_drv_invalid_value)
178        << A->getAsString(Args) << Name;
179      Success = false;
180    } else {
181      Opts.AnalysisDiagOpt = Value;
182    }
183  }
184
185  if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
186    StringRef Name = A->getValue();
187    AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
188#define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
189      .Case(CMDFLAG, NAME)
190#include "clang/StaticAnalyzer/Core/Analyses.def"
191      .Default(NumPurgeModes);
192    if (Value == NumPurgeModes) {
193      Diags.Report(diag::err_drv_invalid_value)
194        << A->getAsString(Args) << Name;
195      Success = false;
196    } else {
197      Opts.AnalysisPurgeOpt = Value;
198    }
199  }
200
201  if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
202    StringRef Name = A->getValue();
203    AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
204#define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
205      .Case(CMDFLAG, NAME)
206#include "clang/StaticAnalyzer/Core/Analyses.def"
207      .Default(NumInliningModes);
208    if (Value == NumInliningModes) {
209      Diags.Report(diag::err_drv_invalid_value)
210        << A->getAsString(Args) << Name;
211      Success = false;
212    } else {
213      Opts.InliningMode = Value;
214    }
215  }
216
217  Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
218  Opts.visualizeExplodedGraphWithGraphViz =
219    Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
220  Opts.visualizeExplodedGraphWithUbiGraph =
221    Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
222  Opts.NoRetryExhausted = Args.hasArg(OPT_analyzer_disable_retry_exhausted);
223  Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
224  Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
225  Opts.AnalyzeNestedBlocks =
226    Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
227  Opts.eagerlyAssumeBinOpBifurcation = Args.hasArg(OPT_analyzer_eagerly_assume);
228  Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
229  Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
230  Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
231  Opts.maxBlockVisitOnPath =
232      getLastArgIntValue(Args, OPT_analyzer_max_loop, 4, Diags);
233  Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
234  Opts.InlineMaxStackDepth =
235      getLastArgIntValue(Args, OPT_analyzer_inline_max_stack_depth,
236                         Opts.InlineMaxStackDepth, Diags);
237
238  Opts.CheckersControlList.clear();
239  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_checker,
240                                             OPT_analyzer_disable_checker),
241         ie = Args.filtered_end(); it != ie; ++it) {
242    const Arg *A = *it;
243    A->claim();
244    bool enable = (A->getOption().getID() == OPT_analyzer_checker);
245    // We can have a list of comma separated checker names, e.g:
246    // '-analyzer-checker=cocoa,unix'
247    StringRef checkerList = A->getValue();
248    SmallVector<StringRef, 4> checkers;
249    checkerList.split(checkers, ",");
250    for (unsigned i = 0, e = checkers.size(); i != e; ++i)
251      Opts.CheckersControlList.push_back(std::make_pair(checkers[i], enable));
252  }
253
254  // Go through the analyzer configuration options.
255  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_config),
256       ie = Args.filtered_end(); it != ie; ++it) {
257    const Arg *A = *it;
258    A->claim();
259    // We can have a list of comma separated config names, e.g:
260    // '-analyzer-config key1=val1,key2=val2'
261    StringRef configList = A->getValue();
262    SmallVector<StringRef, 4> configVals;
263    configList.split(configVals, ",");
264    for (unsigned i = 0, e = configVals.size(); i != e; ++i) {
265      StringRef key, val;
266      std::tie(key, val) = configVals[i].split("=");
267      if (val.empty()) {
268        Diags.Report(SourceLocation(),
269                     diag::err_analyzer_config_no_value) << configVals[i];
270        Success = false;
271        break;
272      }
273      if (val.find('=') != StringRef::npos) {
274        Diags.Report(SourceLocation(),
275                     diag::err_analyzer_config_multiple_values)
276          << configVals[i];
277        Success = false;
278        break;
279      }
280      Opts.Config[key] = val;
281    }
282  }
283
284  return Success;
285}
286
287static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
288  Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
289  Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
290  return true;
291}
292
293static void ParseCommentArgs(CommentOptions &Opts, ArgList &Args) {
294  Opts.BlockCommandNames = Args.getAllArgValues(OPT_fcomment_block_commands);
295  Opts.ParseAllComments = Args.hasArg(OPT_fparse_all_comments);
296}
297
298static StringRef getCodeModel(ArgList &Args, DiagnosticsEngine &Diags) {
299  if (Arg *A = Args.getLastArg(OPT_mcode_model)) {
300    StringRef Value = A->getValue();
301    if (Value == "small" || Value == "kernel" || Value == "medium" ||
302        Value == "large")
303      return Value;
304    Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Value;
305  }
306  return "default";
307}
308
309/// \brief Create a new Regex instance out of the string value in \p RpassArg.
310/// It returns a pointer to the newly generated Regex instance.
311static std::shared_ptr<llvm::Regex>
312GenerateOptimizationRemarkRegex(DiagnosticsEngine &Diags, ArgList &Args,
313                                Arg *RpassArg) {
314  StringRef Val = RpassArg->getValue();
315  std::string RegexError;
316  std::shared_ptr<llvm::Regex> Pattern = std::make_shared<llvm::Regex>(Val);
317  if (!Pattern->isValid(RegexError)) {
318    Diags.Report(diag::err_drv_optimization_remark_pattern)
319        << RegexError << RpassArg->getAsString(Args);
320    Pattern.reset();
321  }
322  return Pattern;
323}
324
325static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
326                             DiagnosticsEngine &Diags,
327                             const TargetOptions &TargetOpts) {
328  using namespace options;
329  bool Success = true;
330
331  Opts.OptimizationLevel = getOptimizationLevel(Args, IK, Diags);
332  // TODO: This could be done in Driver
333  unsigned MaxOptLevel = 3;
334  if (Opts.OptimizationLevel > MaxOptLevel) {
335    // If the optimization level is not supported, fall back on the default optimization
336    Diags.Report(diag::warn_drv_optimization_value)
337        << Args.getLastArg(OPT_O)->getAsString(Args) << "-O" << MaxOptLevel;
338    Opts.OptimizationLevel = MaxOptLevel;
339  }
340
341  // We must always run at least the always inlining pass.
342  Opts.setInlining(
343    (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
344                                 : CodeGenOptions::OnlyAlwaysInlining);
345  // -fno-inline-functions overrides OptimizationLevel > 1.
346  Opts.NoInline = Args.hasArg(OPT_fno_inline);
347  Opts.setInlining(Args.hasArg(OPT_fno_inline_functions) ?
348                     CodeGenOptions::OnlyAlwaysInlining : Opts.getInlining());
349
350  if (Args.hasArg(OPT_gline_tables_only)) {
351    Opts.setDebugInfo(CodeGenOptions::DebugLineTablesOnly);
352  } else if (Args.hasArg(OPT_g_Flag) || Args.hasArg(OPT_gdwarf_2) ||
353             Args.hasArg(OPT_gdwarf_3) || Args.hasArg(OPT_gdwarf_4)) {
354    bool Default = false;
355    // Until dtrace (via CTF) and LLDB can deal with distributed debug info,
356    // Darwin and FreeBSD default to standalone/full debug info.
357    if (llvm::Triple(TargetOpts.Triple).isOSDarwin() ||
358        llvm::Triple(TargetOpts.Triple).isOSFreeBSD())
359      Default = true;
360
361    if (Args.hasFlag(OPT_fstandalone_debug, OPT_fno_standalone_debug, Default))
362      Opts.setDebugInfo(CodeGenOptions::FullDebugInfo);
363    else
364      Opts.setDebugInfo(CodeGenOptions::LimitedDebugInfo);
365  }
366  Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
367  Opts.SplitDwarfFile = Args.getLastArgValue(OPT_split_dwarf_file);
368  if (Args.hasArg(OPT_gdwarf_2))
369    Opts.DwarfVersion = 2;
370  else if (Args.hasArg(OPT_gdwarf_3))
371    Opts.DwarfVersion = 3;
372  else if (Args.hasArg(OPT_gdwarf_4))
373    Opts.DwarfVersion = 4;
374  else if (Opts.getDebugInfo() != CodeGenOptions::NoDebugInfo)
375    // Default Dwarf version is 4 if we are generating debug information.
376    Opts.DwarfVersion = 4;
377
378  Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
379  Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
380  Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
381  Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
382    OPT_fuse_register_sized_bitfield_access);
383  Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
384  Opts.StructPathTBAA = !Args.hasArg(OPT_no_struct_path_tbaa);
385  Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
386  Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
387  Opts.NoCommon = Args.hasArg(OPT_fno_common);
388  Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
389  Opts.OptimizeSize = getOptimizationLevelSize(Args);
390  Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
391                            Args.hasArg(OPT_ffreestanding));
392  Opts.UnrollLoops =
393      Args.hasFlag(OPT_funroll_loops, OPT_fno_unroll_loops,
394                   (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize));
395  Opts.RerollLoops = Args.hasArg(OPT_freroll_loops);
396
397  Opts.DisableIntegratedAS = Args.hasArg(OPT_fno_integrated_as);
398  Opts.Autolink = !Args.hasArg(OPT_fno_autolink);
399  Opts.SampleProfileFile = Args.getLastArgValue(OPT_fprofile_sample_use_EQ);
400  Opts.ProfileInstrGenerate = Args.hasArg(OPT_fprofile_instr_generate);
401  Opts.InstrProfileInput = Args.getLastArgValue(OPT_fprofile_instr_use_EQ);
402  Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
403  Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
404  Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);
405  Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
406  Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
407  Opts.CodeModel = getCodeModel(Args, Diags);
408  Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
409  Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
410  Opts.DisableFree = Args.hasArg(OPT_disable_free);
411  Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
412  Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
413  Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
414  Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
415  Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
416                       Args.hasArg(OPT_cl_finite_math_only)||
417                       Args.hasArg(OPT_cl_fast_relaxed_math));
418  Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
419                       Args.hasArg(OPT_cl_finite_math_only)||
420                       Args.hasArg(OPT_cl_fast_relaxed_math));
421  Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
422  Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
423  Opts.NumRegisterParameters = getLastArgIntValue(Args, OPT_mregparm, 0, Diags);
424  Opts.NoGlobalMerge = Args.hasArg(OPT_mno_global_merge);
425  Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
426  Opts.EnableSegmentedStacks = Args.hasArg(OPT_split_stacks);
427  Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
428  Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
429  Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
430  Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
431  Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
432  Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
433  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
434                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
435                      Args.hasArg(OPT_cl_fast_relaxed_math);
436  Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
437  Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
438  Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
439  Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
440
441  Opts.FunctionSections = Args.hasFlag(OPT_ffunction_sections,
442                                       OPT_fno_function_sections, false);
443  Opts.DataSections = Args.hasFlag(OPT_fdata_sections,
444                                   OPT_fno_data_sections, false);
445
446  Opts.VectorizeBB = Args.hasArg(OPT_vectorize_slp_aggressive);
447  Opts.VectorizeLoop = Args.hasArg(OPT_vectorize_loops);
448  Opts.VectorizeSLP = Args.hasArg(OPT_vectorize_slp);
449
450  Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
451  Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
452  Opts.SanitizeRecover = !Args.hasArg(OPT_fno_sanitize_recover);
453
454  Opts.DisableGCov = Args.hasArg(OPT_test_coverage);
455  Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
456  Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
457  if (Opts.EmitGcovArcs || Opts.EmitGcovNotes) {
458  Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
459    Opts.CoverageExtraChecksum = Args.hasArg(OPT_coverage_cfg_checksum);
460    Opts.CoverageNoFunctionNamesInData =
461        Args.hasArg(OPT_coverage_no_function_names_in_data);
462    if (Args.hasArg(OPT_coverage_version_EQ)) {
463      StringRef CoverageVersion = Args.getLastArgValue(OPT_coverage_version_EQ);
464      if (CoverageVersion.size() != 4) {
465        Diags.Report(diag::err_drv_invalid_value)
466            << Args.getLastArg(OPT_coverage_version_EQ)->getAsString(Args)
467            << CoverageVersion;
468      } else {
469        memcpy(Opts.CoverageVersion, CoverageVersion.data(), 4);
470      }
471    }
472  }
473
474  Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
475  Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
476  Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
477  Opts.CompressDebugSections = Args.hasArg(OPT_compress_debug_sections);
478  Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
479  Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
480  Opts.SanitizerBlacklistFile = Args.getLastArgValue(OPT_fsanitize_blacklist);
481  Opts.SanitizeMemoryTrackOrigins =
482      getLastArgIntValue(Args, OPT_fsanitize_memory_track_origins_EQ, 0, Diags);
483  Opts.SanitizeUndefinedTrapOnError =
484      Args.hasArg(OPT_fsanitize_undefined_trap_on_error);
485  Opts.SSPBufferSize =
486      getLastArgIntValue(Args, OPT_stack_protector_buffer_size, 8, Diags);
487  Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
488  if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
489    StringRef Val = A->getValue();
490    unsigned StackAlignment = Opts.StackAlignment;
491    Val.getAsInteger(10, StackAlignment);
492    Opts.StackAlignment = StackAlignment;
493  }
494
495  if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
496    StringRef Name = A->getValue();
497    unsigned Method = llvm::StringSwitch<unsigned>(Name)
498      .Case("legacy", CodeGenOptions::Legacy)
499      .Case("non-legacy", CodeGenOptions::NonLegacy)
500      .Case("mixed", CodeGenOptions::Mixed)
501      .Default(~0U);
502    if (Method == ~0U) {
503      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
504      Success = false;
505    } else {
506      Opts.setObjCDispatchMethod(
507        static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
508    }
509  }
510
511  if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
512    StringRef Name = A->getValue();
513    unsigned Model = llvm::StringSwitch<unsigned>(Name)
514        .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
515        .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
516        .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
517        .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
518        .Default(~0U);
519    if (Model == ~0U) {
520      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
521      Success = false;
522    } else {
523      Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
524    }
525  }
526
527  if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
528    StringRef Val = A->getValue();
529    if (Val == "fast")
530      Opts.setFPContractMode(CodeGenOptions::FPC_Fast);
531    else if (Val == "on")
532      Opts.setFPContractMode(CodeGenOptions::FPC_On);
533    else if (Val == "off")
534      Opts.setFPContractMode(CodeGenOptions::FPC_Off);
535    else
536      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
537  }
538
539  if (Arg *A = Args.getLastArg(OPT_fpcc_struct_return, OPT_freg_struct_return)) {
540    if (A->getOption().matches(OPT_fpcc_struct_return)) {
541      Opts.setStructReturnConvention(CodeGenOptions::SRCK_OnStack);
542    } else {
543      assert(A->getOption().matches(OPT_freg_struct_return));
544      Opts.setStructReturnConvention(CodeGenOptions::SRCK_InRegs);
545    }
546  }
547
548  Opts.DependentLibraries = Args.getAllArgValues(OPT_dependent_lib);
549  bool NeedLocTracking = false;
550
551  if (Arg *A = Args.getLastArg(OPT_Rpass_EQ)) {
552    Opts.OptimizationRemarkPattern =
553        GenerateOptimizationRemarkRegex(Diags, Args, A);
554    NeedLocTracking = true;
555  }
556
557  if (Arg *A = Args.getLastArg(OPT_Rpass_missed_EQ)) {
558    Opts.OptimizationRemarkMissedPattern =
559        GenerateOptimizationRemarkRegex(Diags, Args, A);
560    NeedLocTracking = true;
561  }
562
563  if (Arg *A = Args.getLastArg(OPT_Rpass_analysis_EQ)) {
564    Opts.OptimizationRemarkAnalysisPattern =
565        GenerateOptimizationRemarkRegex(Diags, Args, A);
566    NeedLocTracking = true;
567  }
568
569  // If the user requested one of the flags in the -Rpass family, make sure
570  // that the backend tracks source location information.
571  if (NeedLocTracking && Opts.getDebugInfo() == CodeGenOptions::NoDebugInfo)
572    Opts.setDebugInfo(CodeGenOptions::LocTrackingOnly);
573
574  return Success;
575}
576
577static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
578                                      ArgList &Args) {
579  using namespace options;
580  Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
581  Opts.Targets = Args.getAllArgValues(OPT_MT);
582  Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
583  Opts.IncludeModuleFiles = Args.hasArg(OPT_module_file_deps);
584  Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
585  Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
586  Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
587  Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
588  Opts.PrintShowIncludes = Args.hasArg(OPT_show_includes);
589  Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
590  Opts.ModuleDependencyOutputDir =
591      Args.getLastArgValue(OPT_module_dependency_dir);
592}
593
594bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
595                                DiagnosticsEngine *Diags) {
596  using namespace options;
597  bool Success = true;
598
599  Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
600  Opts.DiagnosticSerializationFile =
601    Args.getLastArgValue(OPT_diagnostic_serialized_file);
602  Opts.IgnoreWarnings = Args.hasArg(OPT_w);
603  Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
604  Opts.Pedantic = Args.hasArg(OPT_pedantic);
605  Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
606  Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
607  Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
608  Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
609                                 OPT_fno_show_column,
610                                 /*Default=*/true);
611  Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
612  Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
613  Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
614
615  llvm::sys::Process::UseANSIEscapeCodes(Args.hasArg(OPT_fansi_escape_codes));
616
617  // Default behavior is to not to show note include stacks.
618  Opts.ShowNoteIncludeStack = false;
619  if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
620                               OPT_fno_diagnostics_show_note_include_stack))
621    if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
622      Opts.ShowNoteIncludeStack = true;
623
624  StringRef ShowOverloads =
625    Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
626  if (ShowOverloads == "best")
627    Opts.setShowOverloads(Ovl_Best);
628  else if (ShowOverloads == "all")
629    Opts.setShowOverloads(Ovl_All);
630  else {
631    Success = false;
632    if (Diags)
633      Diags->Report(diag::err_drv_invalid_value)
634      << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
635      << ShowOverloads;
636  }
637
638  StringRef ShowCategory =
639    Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
640  if (ShowCategory == "none")
641    Opts.ShowCategories = 0;
642  else if (ShowCategory == "id")
643    Opts.ShowCategories = 1;
644  else if (ShowCategory == "name")
645    Opts.ShowCategories = 2;
646  else {
647    Success = false;
648    if (Diags)
649      Diags->Report(diag::err_drv_invalid_value)
650      << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
651      << ShowCategory;
652  }
653
654  StringRef Format =
655    Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
656  if (Format == "clang")
657    Opts.setFormat(DiagnosticOptions::Clang);
658  else if (Format == "msvc")
659    Opts.setFormat(DiagnosticOptions::Msvc);
660  else if (Format == "msvc-fallback") {
661    Opts.setFormat(DiagnosticOptions::Msvc);
662    Opts.CLFallbackMode = true;
663  } else if (Format == "vi")
664    Opts.setFormat(DiagnosticOptions::Vi);
665  else {
666    Success = false;
667    if (Diags)
668      Diags->Report(diag::err_drv_invalid_value)
669      << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
670      << Format;
671  }
672
673  Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
674  Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
675  Opts.ShowPresumedLoc = !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
676  Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
677  Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
678  Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
679  Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
680  Opts.MacroBacktraceLimit =
681      getLastArgIntValue(Args, OPT_fmacro_backtrace_limit,
682                         DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
683  Opts.TemplateBacktraceLimit = getLastArgIntValue(
684      Args, OPT_ftemplate_backtrace_limit,
685      DiagnosticOptions::DefaultTemplateBacktraceLimit, Diags);
686  Opts.ConstexprBacktraceLimit = getLastArgIntValue(
687      Args, OPT_fconstexpr_backtrace_limit,
688      DiagnosticOptions::DefaultConstexprBacktraceLimit, Diags);
689  Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
690                                    DiagnosticOptions::DefaultTabStop, Diags);
691  if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
692    Opts.TabStop = DiagnosticOptions::DefaultTabStop;
693    if (Diags)
694      Diags->Report(diag::warn_ignoring_ftabstop_value)
695      << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
696  }
697  Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
698  addDiagnosticArgs(Args, OPT_W_Group, OPT_W_value_Group, Opts.Warnings);
699  addDiagnosticArgs(Args, OPT_R_Group, OPT_R_value_Group, Opts.Remarks);
700
701  return Success;
702}
703
704static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
705  Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
706}
707
708static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
709                                   DiagnosticsEngine &Diags) {
710  using namespace options;
711  Opts.ProgramAction = frontend::ParseSyntaxOnly;
712  if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
713    switch (A->getOption().getID()) {
714    default:
715      llvm_unreachable("Invalid option in group!");
716    case OPT_ast_list:
717      Opts.ProgramAction = frontend::ASTDeclList; break;
718    case OPT_ast_dump:
719      Opts.ProgramAction = frontend::ASTDump; break;
720    case OPT_ast_print:
721      Opts.ProgramAction = frontend::ASTPrint; break;
722    case OPT_ast_view:
723      Opts.ProgramAction = frontend::ASTView; break;
724    case OPT_dump_raw_tokens:
725      Opts.ProgramAction = frontend::DumpRawTokens; break;
726    case OPT_dump_tokens:
727      Opts.ProgramAction = frontend::DumpTokens; break;
728    case OPT_S:
729      Opts.ProgramAction = frontend::EmitAssembly; break;
730    case OPT_emit_llvm_bc:
731      Opts.ProgramAction = frontend::EmitBC; break;
732    case OPT_emit_html:
733      Opts.ProgramAction = frontend::EmitHTML; break;
734    case OPT_emit_llvm:
735      Opts.ProgramAction = frontend::EmitLLVM; break;
736    case OPT_emit_llvm_only:
737      Opts.ProgramAction = frontend::EmitLLVMOnly; break;
738    case OPT_emit_codegen_only:
739      Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
740    case OPT_emit_obj:
741      Opts.ProgramAction = frontend::EmitObj; break;
742    case OPT_fixit_EQ:
743      Opts.FixItSuffix = A->getValue();
744      // fall-through!
745    case OPT_fixit:
746      Opts.ProgramAction = frontend::FixIt; break;
747    case OPT_emit_module:
748      Opts.ProgramAction = frontend::GenerateModule; break;
749    case OPT_emit_pch:
750      Opts.ProgramAction = frontend::GeneratePCH; break;
751    case OPT_emit_pth:
752      Opts.ProgramAction = frontend::GeneratePTH; break;
753    case OPT_init_only:
754      Opts.ProgramAction = frontend::InitOnly; break;
755    case OPT_fsyntax_only:
756      Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
757    case OPT_module_file_info:
758      Opts.ProgramAction = frontend::ModuleFileInfo; break;
759    case OPT_verify_pch:
760      Opts.ProgramAction = frontend::VerifyPCH; break;
761    case OPT_print_decl_contexts:
762      Opts.ProgramAction = frontend::PrintDeclContext; break;
763    case OPT_print_preamble:
764      Opts.ProgramAction = frontend::PrintPreamble; break;
765    case OPT_E:
766      Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
767    case OPT_rewrite_macros:
768      Opts.ProgramAction = frontend::RewriteMacros; break;
769    case OPT_rewrite_objc:
770      Opts.ProgramAction = frontend::RewriteObjC; break;
771    case OPT_rewrite_test:
772      Opts.ProgramAction = frontend::RewriteTest; break;
773    case OPT_analyze:
774      Opts.ProgramAction = frontend::RunAnalysis; break;
775    case OPT_migrate:
776      Opts.ProgramAction = frontend::MigrateSource; break;
777    case OPT_Eonly:
778      Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
779    }
780  }
781
782  if (const Arg* A = Args.getLastArg(OPT_plugin)) {
783    Opts.Plugins.push_back(A->getValue(0));
784    Opts.ProgramAction = frontend::PluginAction;
785    Opts.ActionName = A->getValue();
786
787    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
788           end = Args.filtered_end(); it != end; ++it) {
789      if ((*it)->getValue(0) == Opts.ActionName)
790        Opts.PluginArgs.push_back((*it)->getValue(1));
791    }
792  }
793
794  Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
795  Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
796  for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
797    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
798           end = Args.filtered_end(); it != end; ++it) {
799      if ((*it)->getValue(0) == Opts.AddPluginActions[i])
800        Opts.AddPluginArgs[i].push_back((*it)->getValue(1));
801    }
802  }
803
804  if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
805    Opts.CodeCompletionAt =
806      ParsedSourceLocation::FromString(A->getValue());
807    if (Opts.CodeCompletionAt.FileName.empty())
808      Diags.Report(diag::err_drv_invalid_value)
809        << A->getAsString(Args) << A->getValue();
810  }
811  Opts.DisableFree = Args.hasArg(OPT_disable_free);
812
813  Opts.OutputFile = Args.getLastArgValue(OPT_o);
814  Opts.Plugins = Args.getAllArgValues(OPT_load);
815  Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
816  Opts.ShowHelp = Args.hasArg(OPT_help);
817  Opts.ShowStats = Args.hasArg(OPT_print_stats);
818  Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
819  Opts.ShowVersion = Args.hasArg(OPT_version);
820  Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
821  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
822  Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
823  Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
824  Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
825  Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
826  Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
827  Opts.ASTDumpLookups = Args.hasArg(OPT_ast_dump_lookups);
828  Opts.UseGlobalModuleIndex = !Args.hasArg(OPT_fno_modules_global_index);
829  Opts.GenerateGlobalModuleIndex = Opts.UseGlobalModuleIndex;
830
831  Opts.CodeCompleteOpts.IncludeMacros
832    = Args.hasArg(OPT_code_completion_macros);
833  Opts.CodeCompleteOpts.IncludeCodePatterns
834    = Args.hasArg(OPT_code_completion_patterns);
835  Opts.CodeCompleteOpts.IncludeGlobals
836    = !Args.hasArg(OPT_no_code_completion_globals);
837  Opts.CodeCompleteOpts.IncludeBriefComments
838    = Args.hasArg(OPT_code_completion_brief_comments);
839
840  Opts.OverrideRecordLayoutsFile
841    = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
842  if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
843                                     OPT_arcmt_modify,
844                                     OPT_arcmt_migrate)) {
845    switch (A->getOption().getID()) {
846    default:
847      llvm_unreachable("missed a case");
848    case OPT_arcmt_check:
849      Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
850      break;
851    case OPT_arcmt_modify:
852      Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
853      break;
854    case OPT_arcmt_migrate:
855      Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
856      break;
857    }
858  }
859  Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
860  Opts.ARCMTMigrateReportOut
861    = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
862  Opts.ARCMTMigrateEmitARCErrors
863    = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
864
865  if (Args.hasArg(OPT_objcmt_migrate_literals))
866    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
867  if (Args.hasArg(OPT_objcmt_migrate_subscripting))
868    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
869  if (Args.hasArg(OPT_objcmt_migrate_property))
870    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Property;
871  if (Args.hasArg(OPT_objcmt_migrate_readonly_property))
872    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadonlyProperty;
873  if (Args.hasArg(OPT_objcmt_migrate_readwrite_property))
874    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadwriteProperty;
875  if (Args.hasArg(OPT_objcmt_migrate_annotation))
876    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Annotation;
877  if (Args.hasArg(OPT_objcmt_returns_innerpointer_property))
878    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReturnsInnerPointerProperty;
879  if (Args.hasArg(OPT_objcmt_migrate_instancetype))
880    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Instancetype;
881  if (Args.hasArg(OPT_objcmt_migrate_nsmacros))
882    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsMacros;
883  if (Args.hasArg(OPT_objcmt_migrate_protocol_conformance))
884    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ProtocolConformance;
885  if (Args.hasArg(OPT_objcmt_atomic_property))
886    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_AtomicProperty;
887  if (Args.hasArg(OPT_objcmt_ns_nonatomic_iosonly))
888    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsAtomicIOSOnlyProperty;
889  if (Args.hasArg(OPT_objcmt_migrate_designated_init))
890    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_DesignatedInitializer;
891  if (Args.hasArg(OPT_objcmt_migrate_all))
892    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_MigrateDecls;
893
894  Opts.ObjCMTWhiteListPath = Args.getLastArgValue(OPT_objcmt_whitelist_dir_path);
895
896  if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
897      Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
898    Diags.Report(diag::err_drv_argument_not_allowed_with)
899      << "ARC migration" << "ObjC migration";
900  }
901
902  InputKind DashX = IK_None;
903  if (const Arg *A = Args.getLastArg(OPT_x)) {
904    DashX = llvm::StringSwitch<InputKind>(A->getValue())
905      .Case("c", IK_C)
906      .Case("cl", IK_OpenCL)
907      .Case("cuda", IK_CUDA)
908      .Case("c++", IK_CXX)
909      .Case("objective-c", IK_ObjC)
910      .Case("objective-c++", IK_ObjCXX)
911      .Case("cpp-output", IK_PreprocessedC)
912      .Case("assembler-with-cpp", IK_Asm)
913      .Case("c++-cpp-output", IK_PreprocessedCXX)
914      .Case("objective-c-cpp-output", IK_PreprocessedObjC)
915      .Case("objc-cpp-output", IK_PreprocessedObjC)
916      .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
917      .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
918      .Case("c-header", IK_C)
919      .Case("cl-header", IK_OpenCL)
920      .Case("objective-c-header", IK_ObjC)
921      .Case("c++-header", IK_CXX)
922      .Case("objective-c++-header", IK_ObjCXX)
923      .Cases("ast", "pcm", IK_AST)
924      .Case("ir", IK_LLVM_IR)
925      .Default(IK_None);
926    if (DashX == IK_None)
927      Diags.Report(diag::err_drv_invalid_value)
928        << A->getAsString(Args) << A->getValue();
929  }
930
931  // '-' is the default input if none is given.
932  std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
933  Opts.Inputs.clear();
934  if (Inputs.empty())
935    Inputs.push_back("-");
936  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
937    InputKind IK = DashX;
938    if (IK == IK_None) {
939      IK = FrontendOptions::getInputKindForExtension(
940        StringRef(Inputs[i]).rsplit('.').second);
941      // FIXME: Remove this hack.
942      if (i == 0)
943        DashX = IK;
944    }
945    Opts.Inputs.push_back(FrontendInputFile(Inputs[i], IK));
946  }
947
948  return DashX;
949}
950
951std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
952                                                 void *MainAddr) {
953  SmallString<128> P(llvm::sys::fs::getMainExecutable(Argv0, MainAddr));
954
955  if (!P.empty()) {
956    llvm::sys::path::remove_filename(P); // Remove /clang from foo/bin/clang
957    llvm::sys::path::remove_filename(P); // Remove /bin   from foo/bin
958
959    // Get foo/lib/clang/<version>/include
960    llvm::sys::path::append(P, "lib", "clang", CLANG_VERSION_STRING);
961  }
962
963  return P.str();
964}
965
966static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
967  using namespace options;
968  Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
969  Opts.Verbose = Args.hasArg(OPT_v);
970  Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
971  Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
972  Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
973  if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
974    Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
975  Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
976  Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodules_cache_path);
977  Opts.ModuleUserBuildPath = Args.getLastArgValue(OPT_fmodules_user_build_path);
978  Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
979  // -fmodules implies -fmodule-maps
980  Opts.ModuleMaps = Args.hasArg(OPT_fmodule_maps) || Args.hasArg(OPT_fmodules);
981  Opts.ModuleCachePruneInterval =
982      getLastArgIntValue(Args, OPT_fmodules_prune_interval, 7 * 24 * 60 * 60);
983  Opts.ModuleCachePruneAfter =
984      getLastArgIntValue(Args, OPT_fmodules_prune_after, 31 * 24 * 60 * 60);
985  Opts.ModulesValidateOncePerBuildSession =
986      Args.hasArg(OPT_fmodules_validate_once_per_build_session);
987  Opts.BuildSessionTimestamp =
988      getLastArgUInt64Value(Args, OPT_fbuild_session_timestamp, 0);
989  Opts.ModulesValidateSystemHeaders =
990      Args.hasArg(OPT_fmodules_validate_system_headers);
991
992  for (arg_iterator it = Args.filtered_begin(OPT_fmodules_ignore_macro),
993                    ie = Args.filtered_end();
994       it != ie; ++it) {
995    StringRef MacroDef = (*it)->getValue();
996    Opts.ModulesIgnoreMacros.insert(MacroDef.split('=').first);
997  }
998  std::vector<std::string> ModuleMapFiles =
999      Args.getAllArgValues(OPT_fmodule_map_file);
1000  Opts.ModuleMapFiles.insert(ModuleMapFiles.begin(), ModuleMapFiles.end());
1001
1002  // Add -I..., -F..., and -index-header-map options in order.
1003  bool IsIndexHeaderMap = false;
1004  for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F,
1005                                             OPT_index_header_map),
1006       ie = Args.filtered_end(); it != ie; ++it) {
1007    if ((*it)->getOption().matches(OPT_index_header_map)) {
1008      // -index-header-map applies to the next -I or -F.
1009      IsIndexHeaderMap = true;
1010      continue;
1011    }
1012
1013    frontend::IncludeDirGroup Group
1014      = IsIndexHeaderMap? frontend::IndexHeaderMap : frontend::Angled;
1015
1016    Opts.AddPath((*it)->getValue(), Group,
1017                 /*IsFramework=*/ (*it)->getOption().matches(OPT_F), true);
1018    IsIndexHeaderMap = false;
1019  }
1020
1021  // Add -iprefix/-iwithprefix/-iwithprefixbefore options.
1022  StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1023  for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1024                                             OPT_iwithprefixbefore),
1025         ie = Args.filtered_end(); it != ie; ++it) {
1026    const Arg *A = *it;
1027    if (A->getOption().matches(OPT_iprefix))
1028      Prefix = A->getValue();
1029    else if (A->getOption().matches(OPT_iwithprefix))
1030      Opts.AddPath(Prefix.str() + A->getValue(),
1031                   frontend::After, false, true);
1032    else
1033      Opts.AddPath(Prefix.str() + A->getValue(),
1034                   frontend::Angled, false, true);
1035  }
1036
1037  for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1038         ie = Args.filtered_end(); it != ie; ++it)
1039    Opts.AddPath((*it)->getValue(), frontend::After, false, true);
1040  for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1041         ie = Args.filtered_end(); it != ie; ++it)
1042    Opts.AddPath((*it)->getValue(), frontend::Quoted, false, true);
1043  for (arg_iterator it = Args.filtered_begin(OPT_isystem,
1044         OPT_iwithsysroot), ie = Args.filtered_end(); it != ie; ++it)
1045    Opts.AddPath((*it)->getValue(), frontend::System, false,
1046                 !(*it)->getOption().matches(OPT_iwithsysroot));
1047  for (arg_iterator it = Args.filtered_begin(OPT_iframework),
1048         ie = Args.filtered_end(); it != ie; ++it)
1049    Opts.AddPath((*it)->getValue(), frontend::System, true, true);
1050
1051  // Add the paths for the various language specific isystem flags.
1052  for (arg_iterator it = Args.filtered_begin(OPT_c_isystem),
1053       ie = Args.filtered_end(); it != ie; ++it)
1054    Opts.AddPath((*it)->getValue(), frontend::CSystem, false, true);
1055  for (arg_iterator it = Args.filtered_begin(OPT_cxx_isystem),
1056       ie = Args.filtered_end(); it != ie; ++it)
1057    Opts.AddPath((*it)->getValue(), frontend::CXXSystem, false, true);
1058  for (arg_iterator it = Args.filtered_begin(OPT_objc_isystem),
1059       ie = Args.filtered_end(); it != ie; ++it)
1060    Opts.AddPath((*it)->getValue(), frontend::ObjCSystem, false,true);
1061  for (arg_iterator it = Args.filtered_begin(OPT_objcxx_isystem),
1062       ie = Args.filtered_end(); it != ie; ++it)
1063    Opts.AddPath((*it)->getValue(), frontend::ObjCXXSystem, false, true);
1064
1065  // Add the internal paths from a driver that detects standard include paths.
1066  for (arg_iterator I = Args.filtered_begin(OPT_internal_isystem,
1067                                            OPT_internal_externc_isystem),
1068                    E = Args.filtered_end();
1069       I != E; ++I) {
1070    frontend::IncludeDirGroup Group = frontend::System;
1071    if ((*I)->getOption().matches(OPT_internal_externc_isystem))
1072      Group = frontend::ExternCSystem;
1073    Opts.AddPath((*I)->getValue(), Group, false, true);
1074  }
1075
1076  // Add the path prefixes which are implicitly treated as being system headers.
1077  for (arg_iterator I = Args.filtered_begin(OPT_system_header_prefix,
1078                                            OPT_no_system_header_prefix),
1079                    E = Args.filtered_end();
1080       I != E; ++I)
1081    Opts.AddSystemHeaderPrefix(
1082        (*I)->getValue(), (*I)->getOption().matches(OPT_system_header_prefix));
1083
1084  for (arg_iterator I = Args.filtered_begin(OPT_ivfsoverlay),
1085       E = Args.filtered_end(); I != E; ++I)
1086    Opts.AddVFSOverlayFile((*I)->getValue());
1087}
1088
1089void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
1090                                         LangStandard::Kind LangStd) {
1091  // Set some properties which depend solely on the input kind; it would be nice
1092  // to move these to the language standard, and have the driver resolve the
1093  // input kind + language standard.
1094  if (IK == IK_Asm) {
1095    Opts.AsmPreprocessor = 1;
1096  } else if (IK == IK_ObjC ||
1097             IK == IK_ObjCXX ||
1098             IK == IK_PreprocessedObjC ||
1099             IK == IK_PreprocessedObjCXX) {
1100    Opts.ObjC1 = Opts.ObjC2 = 1;
1101  }
1102
1103  if (LangStd == LangStandard::lang_unspecified) {
1104    // Based on the base language, pick one.
1105    switch (IK) {
1106    case IK_None:
1107    case IK_AST:
1108    case IK_LLVM_IR:
1109      llvm_unreachable("Invalid input kind!");
1110    case IK_OpenCL:
1111      LangStd = LangStandard::lang_opencl;
1112      break;
1113    case IK_CUDA:
1114      LangStd = LangStandard::lang_cuda;
1115      break;
1116    case IK_Asm:
1117    case IK_C:
1118    case IK_PreprocessedC:
1119    case IK_ObjC:
1120    case IK_PreprocessedObjC:
1121      LangStd = LangStandard::lang_gnu99;
1122      break;
1123    case IK_CXX:
1124    case IK_PreprocessedCXX:
1125    case IK_ObjCXX:
1126    case IK_PreprocessedObjCXX:
1127      LangStd = LangStandard::lang_gnucxx98;
1128      break;
1129    }
1130  }
1131
1132  const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1133  Opts.LineComment = Std.hasLineComments();
1134  Opts.C99 = Std.isC99();
1135  Opts.C11 = Std.isC11();
1136  Opts.CPlusPlus = Std.isCPlusPlus();
1137  Opts.CPlusPlus11 = Std.isCPlusPlus11();
1138  Opts.CPlusPlus1y = Std.isCPlusPlus1y();
1139  Opts.CPlusPlus1z = Std.isCPlusPlus1z();
1140  Opts.Digraphs = Std.hasDigraphs();
1141  Opts.GNUMode = Std.isGNUMode();
1142  Opts.GNUInline = !Std.isC99();
1143  Opts.HexFloats = Std.hasHexFloats();
1144  Opts.ImplicitInt = Std.hasImplicitInt();
1145
1146  // Set OpenCL Version.
1147  Opts.OpenCL = LangStd == LangStandard::lang_opencl || IK == IK_OpenCL;
1148  if (LangStd == LangStandard::lang_opencl)
1149    Opts.OpenCLVersion = 100;
1150  else if (LangStd == LangStandard::lang_opencl11)
1151      Opts.OpenCLVersion = 110;
1152  else if (LangStd == LangStandard::lang_opencl12)
1153    Opts.OpenCLVersion = 120;
1154
1155  // OpenCL has some additional defaults.
1156  if (Opts.OpenCL) {
1157    Opts.AltiVec = 0;
1158    Opts.CXXOperatorNames = 1;
1159    Opts.LaxVectorConversions = 0;
1160    Opts.DefaultFPContract = 1;
1161    Opts.NativeHalfType = 1;
1162  }
1163
1164  Opts.CUDA = LangStd == LangStandard::lang_cuda || IK == IK_CUDA;
1165
1166  // OpenCL and C++ both have bool, true, false keywords.
1167  Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1168
1169  // OpenCL has half keyword
1170  Opts.Half = Opts.OpenCL;
1171
1172  // C++ has wchar_t keyword.
1173  Opts.WChar = Opts.CPlusPlus;
1174
1175  Opts.GNUKeywords = Opts.GNUMode;
1176  Opts.CXXOperatorNames = Opts.CPlusPlus;
1177
1178  // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1179  // is specified, or -std is set to a conforming mode.
1180  // Trigraphs are disabled by default in c++1z onwards.
1181  Opts.Trigraphs = !Opts.GNUMode && !Opts.CPlusPlus1z;
1182
1183  Opts.DollarIdents = !Opts.AsmPreprocessor;
1184
1185  // C++1y onwards has sized global deallocation functions.
1186  Opts.SizedDeallocation = Opts.CPlusPlus1y;
1187}
1188
1189/// Attempt to parse a visibility value out of the given argument.
1190static Visibility parseVisibility(Arg *arg, ArgList &args,
1191                                  DiagnosticsEngine &diags) {
1192  StringRef value = arg->getValue();
1193  if (value == "default") {
1194    return DefaultVisibility;
1195  } else if (value == "hidden") {
1196    return HiddenVisibility;
1197  } else if (value == "protected") {
1198    // FIXME: diagnose if target does not support protected visibility
1199    return ProtectedVisibility;
1200  }
1201
1202  diags.Report(diag::err_drv_invalid_value)
1203    << arg->getAsString(args) << value;
1204  return DefaultVisibility;
1205}
1206
1207static unsigned parseMSCVersion(ArgList &Args, DiagnosticsEngine &Diags) {
1208  auto Arg = Args.getLastArg(OPT_fms_compatibility_version);
1209  if (!Arg)
1210    return 0;
1211
1212  // The MSC versioning scheme involves four versioning components:
1213  //  - Major
1214  //  - Minor
1215  //  - Build
1216  //  - Patch
1217  //
1218  // We accept either the old style (_MSC_VER) value, or a _MSC_FULL_VER value.
1219  // Additionally, the value may be provided in the form of a more readable
1220  // MM.mm.bbbbb.pp version.
1221  //
1222  // Unfortunately, due to the bit-width limitations, we cannot currently encode
1223  // the value for the patch level.
1224
1225  unsigned VC[4] = {0};
1226  StringRef Value = Arg->getValue();
1227  SmallVector<StringRef, 4> Components;
1228
1229  Value.split(Components, ".", llvm::array_lengthof(VC));
1230  for (unsigned CI = 0,
1231                CE = std::min(Components.size(), llvm::array_lengthof(VC));
1232       CI < CE; ++CI) {
1233    if (Components[CI].getAsInteger(10, VC[CI])) {
1234      Diags.Report(diag::err_drv_invalid_value)
1235        << Arg->getAsString(Args) << Value;
1236      return 0;
1237    }
1238  }
1239
1240  // FIXME we cannot encode the patch level
1241  return VC[0] * 10000000 + VC[1] * 100000 + VC[2];
1242}
1243
1244static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1245                          DiagnosticsEngine &Diags) {
1246  // FIXME: Cleanup per-file based stuff.
1247  LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1248  if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1249    LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1250#define LANGSTANDARD(id, name, desc, features) \
1251      .Case(name, LangStandard::lang_##id)
1252#include "clang/Frontend/LangStandards.def"
1253      .Default(LangStandard::lang_unspecified);
1254    if (LangStd == LangStandard::lang_unspecified)
1255      Diags.Report(diag::err_drv_invalid_value)
1256        << A->getAsString(Args) << A->getValue();
1257    else {
1258      // Valid standard, check to make sure language and standard are
1259      // compatible.
1260      const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1261      switch (IK) {
1262      case IK_C:
1263      case IK_ObjC:
1264      case IK_PreprocessedC:
1265      case IK_PreprocessedObjC:
1266        if (!(Std.isC89() || Std.isC99()))
1267          Diags.Report(diag::err_drv_argument_not_allowed_with)
1268            << A->getAsString(Args) << "C/ObjC";
1269        break;
1270      case IK_CXX:
1271      case IK_ObjCXX:
1272      case IK_PreprocessedCXX:
1273      case IK_PreprocessedObjCXX:
1274        if (!Std.isCPlusPlus())
1275          Diags.Report(diag::err_drv_argument_not_allowed_with)
1276            << A->getAsString(Args) << "C++/ObjC++";
1277        break;
1278      case IK_OpenCL:
1279        if (!Std.isC99())
1280          Diags.Report(diag::err_drv_argument_not_allowed_with)
1281            << A->getAsString(Args) << "OpenCL";
1282        break;
1283      case IK_CUDA:
1284        if (!Std.isCPlusPlus())
1285          Diags.Report(diag::err_drv_argument_not_allowed_with)
1286            << A->getAsString(Args) << "CUDA";
1287        break;
1288      default:
1289        break;
1290      }
1291    }
1292  }
1293
1294  // -cl-std only applies for OpenCL language standards.
1295  // Override the -std option in this case.
1296  if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1297    LangStandard::Kind OpenCLLangStd
1298    = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1299    .Case("CL", LangStandard::lang_opencl)
1300    .Case("CL1.1", LangStandard::lang_opencl11)
1301    .Case("CL1.2", LangStandard::lang_opencl12)
1302    .Default(LangStandard::lang_unspecified);
1303
1304    if (OpenCLLangStd == LangStandard::lang_unspecified) {
1305      Diags.Report(diag::err_drv_invalid_value)
1306      << A->getAsString(Args) << A->getValue();
1307    }
1308    else
1309      LangStd = OpenCLLangStd;
1310  }
1311
1312  CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1313
1314  // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1315  // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1316  // while a subset (the non-C++ GNU keywords) is provided by GCC's
1317  // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1318  // name, as it doesn't seem a useful distinction.
1319  Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1320                                  Opts.GNUKeywords);
1321
1322  if (Args.hasArg(OPT_fno_operator_names))
1323    Opts.CXXOperatorNames = 0;
1324
1325  if (Opts.ObjC1) {
1326    if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1327      StringRef value = arg->getValue();
1328      if (Opts.ObjCRuntime.tryParse(value))
1329        Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1330    }
1331
1332    if (Args.hasArg(OPT_fobjc_gc_only))
1333      Opts.setGC(LangOptions::GCOnly);
1334    else if (Args.hasArg(OPT_fobjc_gc))
1335      Opts.setGC(LangOptions::HybridGC);
1336    else if (Args.hasArg(OPT_fobjc_arc)) {
1337      Opts.ObjCAutoRefCount = 1;
1338      if (!Opts.ObjCRuntime.allowsARC())
1339        Diags.Report(diag::err_arc_unsupported_on_runtime);
1340
1341      // Only set ObjCARCWeak if ARC is enabled.
1342      if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1343        Opts.ObjCARCWeak = 1;
1344      else
1345        Opts.ObjCARCWeak = Opts.ObjCRuntime.allowsWeak();
1346    }
1347
1348    if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1349      Opts.ObjCInferRelatedResultType = 0;
1350
1351    if (Args.hasArg(OPT_fobjc_subscripting_legacy_runtime))
1352      Opts.ObjCSubscriptingLegacyRuntime =
1353        (Opts.ObjCRuntime.getKind() == ObjCRuntime::FragileMacOSX);
1354  }
1355
1356  if (Args.hasArg(OPT_fgnu89_inline))
1357    Opts.GNUInline = 1;
1358
1359  if (Args.hasArg(OPT_fapple_kext)) {
1360    if (!Opts.CPlusPlus)
1361      Diags.Report(diag::warn_c_kext);
1362    else
1363      Opts.AppleKext = 1;
1364  }
1365
1366  if (Args.hasArg(OPT_print_ivar_layout))
1367    Opts.ObjCGCBitmapPrint = 1;
1368  if (Args.hasArg(OPT_fno_constant_cfstrings))
1369    Opts.NoConstantCFStrings = 1;
1370
1371  if (Args.hasArg(OPT_faltivec))
1372    Opts.AltiVec = 1;
1373
1374  if (Args.hasArg(OPT_pthread))
1375    Opts.POSIXThreads = 1;
1376
1377  // The value-visibility mode defaults to "default".
1378  if (Arg *visOpt = Args.getLastArg(OPT_fvisibility)) {
1379    Opts.setValueVisibilityMode(parseVisibility(visOpt, Args, Diags));
1380  } else {
1381    Opts.setValueVisibilityMode(DefaultVisibility);
1382  }
1383
1384  // The type-visibility mode defaults to the value-visibility mode.
1385  if (Arg *typeVisOpt = Args.getLastArg(OPT_ftype_visibility)) {
1386    Opts.setTypeVisibilityMode(parseVisibility(typeVisOpt, Args, Diags));
1387  } else {
1388    Opts.setTypeVisibilityMode(Opts.getValueVisibilityMode());
1389  }
1390
1391  if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1392    Opts.InlineVisibilityHidden = 1;
1393
1394  if (Args.hasArg(OPT_ftrapv)) {
1395    Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1396    // Set the handler, if one is specified.
1397    Opts.OverflowHandler =
1398        Args.getLastArgValue(OPT_ftrapv_handler);
1399  }
1400  else if (Args.hasArg(OPT_fwrapv))
1401    Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1402
1403  if (Args.hasArg(OPT_trigraphs))
1404    Opts.Trigraphs = 1;
1405
1406  Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1407                                   OPT_fno_dollars_in_identifiers,
1408                                   Opts.DollarIdents);
1409  Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1410  Opts.MSVCCompat = Args.hasArg(OPT_fms_compatibility);
1411  Opts.MicrosoftExt = Opts.MSVCCompat || Args.hasArg(OPT_fms_extensions);
1412  Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
1413  Opts.MSCompatibilityVersion = parseMSCVersion(Args, Diags);
1414  Opts.VtorDispMode = getLastArgIntValue(Args, OPT_vtordisp_mode_EQ, 1, Diags);
1415  Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1416  Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1417  Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
1418                                   Opts.ConstStrings);
1419  if (Args.hasArg(OPT_fno_lax_vector_conversions))
1420    Opts.LaxVectorConversions = 0;
1421  if (Args.hasArg(OPT_fno_threadsafe_statics))
1422    Opts.ThreadsafeStatics = 0;
1423  Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1424  Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
1425  Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
1426  Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1427  Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
1428
1429  Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1430  Opts.RTTIData = Opts.RTTI && !Args.hasArg(OPT_fno_rtti_data);
1431  Opts.Blocks = Args.hasArg(OPT_fblocks);
1432  Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
1433  Opts.Modules = Args.hasArg(OPT_fmodules);
1434  Opts.ModulesStrictDeclUse = Args.hasArg(OPT_fmodules_strict_decluse);
1435  Opts.ModulesDeclUse =
1436      Args.hasArg(OPT_fmodules_decluse) || Opts.ModulesStrictDeclUse;
1437  Opts.ModulesSearchAll = Opts.Modules &&
1438    !Args.hasArg(OPT_fno_modules_search_all) &&
1439    Args.hasArg(OPT_fmodules_search_all);
1440  Opts.ModulesErrorRecovery = !Args.hasArg(OPT_fno_modules_error_recovery);
1441  Opts.CharIsSigned = Opts.OpenCL || !Args.hasArg(OPT_fno_signed_char);
1442  Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
1443  Opts.ShortWChar = Args.hasFlag(OPT_fshort_wchar, OPT_fno_short_wchar, false);
1444  Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1445  Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1446  Opts.FormatExtensions = Args.hasArg(OPT_fformat_extensions);
1447  Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1448  Opts.NoMathBuiltin = Args.hasArg(OPT_fno_math_builtin);
1449  Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1450  Opts.SizedDeallocation |= Args.hasArg(OPT_fsized_deallocation);
1451  Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1452  Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1453  Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1454  Opts.MathErrno = !Opts.OpenCL && Args.hasArg(OPT_fmath_errno);
1455  Opts.InstantiationDepth =
1456      getLastArgIntValue(Args, OPT_ftemplate_depth, 256, Diags);
1457  Opts.ArrowDepth =
1458      getLastArgIntValue(Args, OPT_foperator_arrow_depth, 256, Diags);
1459  Opts.ConstexprCallDepth =
1460      getLastArgIntValue(Args, OPT_fconstexpr_depth, 512, Diags);
1461  Opts.ConstexprStepLimit =
1462      getLastArgIntValue(Args, OPT_fconstexpr_steps, 1048576, Diags);
1463  Opts.BracketDepth = getLastArgIntValue(Args, OPT_fbracket_depth, 256, Diags);
1464  Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
1465  Opts.NumLargeByValueCopy =
1466      getLastArgIntValue(Args, OPT_Wlarge_by_value_copy_EQ, 0, Diags);
1467  Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
1468  Opts.ObjCConstantStringClass =
1469    Args.getLastArgValue(OPT_fconstant_string_class);
1470  Opts.ObjCDefaultSynthProperties =
1471    !Args.hasArg(OPT_disable_objc_default_synthesize_properties);
1472  Opts.EncodeExtendedBlockSig =
1473    Args.hasArg(OPT_fencode_extended_block_signature);
1474  Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1475  Opts.PackStruct = getLastArgIntValue(Args, OPT_fpack_struct_EQ, 0, Diags);
1476  Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
1477  Opts.PIELevel = getLastArgIntValue(Args, OPT_pie_level, 0, Diags);
1478  Opts.Static = Args.hasArg(OPT_static_define);
1479  Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
1480  Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
1481                        || Args.hasArg(OPT_fdump_record_layouts);
1482  Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1483  Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1484  Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1485  Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
1486  Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
1487  Opts.MRTD = Args.hasArg(OPT_mrtd);
1488  Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
1489  Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
1490  Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
1491  Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
1492  Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
1493  Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
1494  Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
1495  Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
1496
1497  if (Arg *A = Args.getLastArg(OPT_faddress_space_map_mangling_EQ)) {
1498    switch (llvm::StringSwitch<unsigned>(A->getValue())
1499      .Case("target", LangOptions::ASMM_Target)
1500      .Case("no", LangOptions::ASMM_Off)
1501      .Case("yes", LangOptions::ASMM_On)
1502      .Default(255)) {
1503    default:
1504      Diags.Report(diag::err_drv_invalid_value)
1505        << "-faddress-space-map-mangling=" << A->getValue();
1506      break;
1507    case LangOptions::ASMM_Target:
1508      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Target);
1509      break;
1510    case LangOptions::ASMM_On:
1511      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_On);
1512      break;
1513    case LangOptions::ASMM_Off:
1514      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Off);
1515      break;
1516    }
1517  }
1518
1519  if (Arg *A = Args.getLastArg(OPT_fms_memptr_rep_EQ)) {
1520    LangOptions::PragmaMSPointersToMembersKind InheritanceModel =
1521        llvm::StringSwitch<LangOptions::PragmaMSPointersToMembersKind>(
1522            A->getValue())
1523            .Case("single",
1524                  LangOptions::PPTMK_FullGeneralitySingleInheritance)
1525            .Case("multiple",
1526                  LangOptions::PPTMK_FullGeneralityMultipleInheritance)
1527            .Case("virtual",
1528                  LangOptions::PPTMK_FullGeneralityVirtualInheritance)
1529            .Default(LangOptions::PPTMK_BestCase);
1530    if (InheritanceModel == LangOptions::PPTMK_BestCase)
1531      Diags.Report(diag::err_drv_invalid_value)
1532          << "-fms-memptr-rep=" << A->getValue();
1533
1534    Opts.setMSPointerToMemberRepresentationMethod(InheritanceModel);
1535  }
1536
1537  // Check if -fopenmp= is specified.
1538  if (const Arg *A = Args.getLastArg(options::OPT_fopenmp_EQ)) {
1539    Opts.OpenMP = llvm::StringSwitch<bool>(A->getValue())
1540        .Case("libiomp5", true)
1541        .Default(false);
1542  }
1543
1544  // Record whether the __DEPRECATED define was requested.
1545  Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
1546                                 OPT_fno_deprecated_macro,
1547                                 Opts.Deprecated);
1548
1549  // FIXME: Eliminate this dependency.
1550  unsigned Opt = getOptimizationLevel(Args, IK, Diags),
1551       OptSize = getOptimizationLevelSize(Args);
1552  Opts.Optimize = Opt != 0;
1553  Opts.OptimizeSize = OptSize != 0;
1554
1555  // This is the __NO_INLINE__ define, which just depends on things like the
1556  // optimization level and -fno-inline, not actually whether the backend has
1557  // inlining enabled.
1558  Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
1559
1560  Opts.FastMath = Args.hasArg(OPT_ffast_math);
1561  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only);
1562
1563  Opts.RetainCommentsFromSystemHeaders =
1564      Args.hasArg(OPT_fretain_comments_from_system_headers);
1565
1566  unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
1567  switch (SSP) {
1568  default:
1569    Diags.Report(diag::err_drv_invalid_value)
1570      << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1571    break;
1572  case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
1573  case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
1574  case 2: Opts.setStackProtector(LangOptions::SSPStrong); break;
1575  case 3: Opts.setStackProtector(LangOptions::SSPReq); break;
1576  }
1577
1578  // Parse -fsanitize= arguments.
1579  std::vector<std::string> Sanitizers = Args.getAllArgValues(OPT_fsanitize_EQ);
1580  for (unsigned I = 0, N = Sanitizers.size(); I != N; ++I) {
1581    // Since the Opts.Sanitize* values are bitfields, it's a little tricky to
1582    // efficiently map string values to them. Perform the mapping indirectly:
1583    // convert strings to enumerated values, then switch over the enum to set
1584    // the right bitfield value.
1585    enum Sanitizer {
1586#define SANITIZER(NAME, ID) \
1587      ID,
1588#include "clang/Basic/Sanitizers.def"
1589      Unknown
1590    };
1591    switch (llvm::StringSwitch<unsigned>(Sanitizers[I])
1592#define SANITIZER(NAME, ID) \
1593              .Case(NAME, ID)
1594#include "clang/Basic/Sanitizers.def"
1595              .Default(Unknown)) {
1596#define SANITIZER(NAME, ID) \
1597    case ID: \
1598      Opts.Sanitize.ID = true; \
1599      break;
1600#include "clang/Basic/Sanitizers.def"
1601
1602    case Unknown:
1603      Diags.Report(diag::err_drv_invalid_value)
1604        << "-fsanitize=" << Sanitizers[I];
1605      break;
1606    }
1607  }
1608}
1609
1610static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1611                                  FileManager &FileMgr,
1612                                  DiagnosticsEngine &Diags) {
1613  using namespace options;
1614  Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1615  Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1616  if (const Arg *A = Args.getLastArg(OPT_token_cache))
1617      Opts.TokenCache = A->getValue();
1618  else
1619    Opts.TokenCache = Opts.ImplicitPTHInclude;
1620  Opts.UsePredefines = !Args.hasArg(OPT_undef);
1621  Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1622  Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1623
1624  Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
1625  for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
1626         ie = Args.filtered_end(); it != ie; ++it) {
1627    const Arg *A = *it;
1628    Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
1629  }
1630
1631  if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1632    StringRef Value(A->getValue());
1633    size_t Comma = Value.find(',');
1634    unsigned Bytes = 0;
1635    unsigned EndOfLine = 0;
1636
1637    if (Comma == StringRef::npos ||
1638        Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1639        Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1640      Diags.Report(diag::err_drv_preamble_format);
1641    else {
1642      Opts.PrecompiledPreambleBytes.first = Bytes;
1643      Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1644    }
1645  }
1646
1647  // Add macros from the command line.
1648  for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1649         ie = Args.filtered_end(); it != ie; ++it) {
1650    if ((*it)->getOption().matches(OPT_D))
1651      Opts.addMacroDef((*it)->getValue());
1652    else
1653      Opts.addMacroUndef((*it)->getValue());
1654  }
1655
1656  Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1657
1658  // Add the ordered list of -includes.
1659  for (arg_iterator it = Args.filtered_begin(OPT_include),
1660         ie = Args.filtered_end(); it != ie; ++it) {
1661    const Arg *A = *it;
1662    Opts.Includes.push_back(A->getValue());
1663  }
1664
1665  for (arg_iterator it = Args.filtered_begin(OPT_chain_include),
1666         ie = Args.filtered_end(); it != ie; ++it) {
1667    const Arg *A = *it;
1668    Opts.ChainedIncludes.push_back(A->getValue());
1669  }
1670
1671  // Include 'altivec.h' if -faltivec option present
1672  if (Args.hasArg(OPT_faltivec))
1673    Opts.Includes.push_back("altivec.h");
1674
1675  for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1676         ie = Args.filtered_end(); it != ie; ++it) {
1677    const Arg *A = *it;
1678    std::pair<StringRef,StringRef> Split =
1679      StringRef(A->getValue()).split(';');
1680
1681    if (Split.second.empty()) {
1682      Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1683      continue;
1684    }
1685
1686    Opts.addRemappedFile(Split.first, Split.second);
1687  }
1688
1689  if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
1690    StringRef Name = A->getValue();
1691    unsigned Library = llvm::StringSwitch<unsigned>(Name)
1692      .Case("libc++", ARCXX_libcxx)
1693      .Case("libstdc++", ARCXX_libstdcxx)
1694      .Case("none", ARCXX_nolib)
1695      .Default(~0U);
1696    if (Library == ~0U)
1697      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1698    else
1699      Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
1700  }
1701}
1702
1703static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1704                                        ArgList &Args,
1705                                        frontend::ActionKind Action) {
1706  using namespace options;
1707
1708  switch (Action) {
1709  case frontend::ASTDeclList:
1710  case frontend::ASTDump:
1711  case frontend::ASTPrint:
1712  case frontend::ASTView:
1713  case frontend::EmitAssembly:
1714  case frontend::EmitBC:
1715  case frontend::EmitHTML:
1716  case frontend::EmitLLVM:
1717  case frontend::EmitLLVMOnly:
1718  case frontend::EmitCodeGenOnly:
1719  case frontend::EmitObj:
1720  case frontend::FixIt:
1721  case frontend::GenerateModule:
1722  case frontend::GeneratePCH:
1723  case frontend::GeneratePTH:
1724  case frontend::ParseSyntaxOnly:
1725  case frontend::ModuleFileInfo:
1726  case frontend::VerifyPCH:
1727  case frontend::PluginAction:
1728  case frontend::PrintDeclContext:
1729  case frontend::RewriteObjC:
1730  case frontend::RewriteTest:
1731  case frontend::RunAnalysis:
1732  case frontend::MigrateSource:
1733    Opts.ShowCPP = 0;
1734    break;
1735
1736  case frontend::DumpRawTokens:
1737  case frontend::DumpTokens:
1738  case frontend::InitOnly:
1739  case frontend::PrintPreamble:
1740  case frontend::PrintPreprocessedInput:
1741  case frontend::RewriteMacros:
1742  case frontend::RunPreprocessorOnly:
1743    Opts.ShowCPP = !Args.hasArg(OPT_dM);
1744    break;
1745  }
1746
1747  Opts.ShowComments = Args.hasArg(OPT_C);
1748  Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1749  Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1750  Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1751  Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
1752}
1753
1754static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1755  using namespace options;
1756  Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1757  Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1758  Opts.FPMath = Args.getLastArgValue(OPT_mfpmath);
1759  Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
1760  Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1761  Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1762
1763  // Use the default target triple if unspecified.
1764  if (Opts.Triple.empty())
1765    Opts.Triple = llvm::sys::getDefaultTargetTriple();
1766}
1767
1768bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1769                                        const char *const *ArgBegin,
1770                                        const char *const *ArgEnd,
1771                                        DiagnosticsEngine &Diags) {
1772  bool Success = true;
1773
1774  // Parse the arguments.
1775  std::unique_ptr<OptTable> Opts(createDriverOptTable());
1776  const unsigned IncludedFlagsBitmask = options::CC1Option;
1777  unsigned MissingArgIndex, MissingArgCount;
1778  std::unique_ptr<InputArgList> Args(
1779      Opts->ParseArgs(ArgBegin, ArgEnd, MissingArgIndex, MissingArgCount,
1780                      IncludedFlagsBitmask));
1781
1782  // Check for missing argument error.
1783  if (MissingArgCount) {
1784    Diags.Report(diag::err_drv_missing_argument)
1785      << Args->getArgString(MissingArgIndex) << MissingArgCount;
1786    Success = false;
1787  }
1788
1789  // Issue errors on unknown arguments.
1790  for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1791         ie = Args->filtered_end(); it != ie; ++it) {
1792    Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
1793    Success = false;
1794  }
1795
1796  Success = ParseAnalyzerArgs(*Res.getAnalyzerOpts(), *Args, Diags) && Success;
1797  Success = ParseMigratorArgs(Res.getMigratorOpts(), *Args) && Success;
1798  ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1799  Success = ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, &Diags)
1800            && Success;
1801  ParseCommentArgs(Res.getLangOpts()->CommentOpts, *Args);
1802  ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
1803  // FIXME: We shouldn't have to pass the DashX option around here
1804  InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1805  ParseTargetArgs(Res.getTargetOpts(), *Args);
1806  Success = ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags,
1807                             Res.getTargetOpts()) && Success;
1808  ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1809  if (DashX != IK_AST && DashX != IK_LLVM_IR) {
1810    ParseLangArgs(*Res.getLangOpts(), *Args, DashX, Diags);
1811    if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
1812      Res.getLangOpts()->ObjCExceptions = 1;
1813  }
1814  // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
1815  // PCH file and find the original header name. Remove the need to do that in
1816  // ParsePreprocessorArgs and remove the FileManager
1817  // parameters from the function and the "FileManager.h" #include.
1818  FileManager FileMgr(Res.getFileSystemOpts());
1819  ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
1820  ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args,
1821                              Res.getFrontendOpts().ProgramAction);
1822  return Success;
1823}
1824
1825namespace {
1826
1827  class ModuleSignature {
1828    SmallVector<uint64_t, 16> Data;
1829    unsigned CurBit;
1830    uint64_t CurValue;
1831
1832  public:
1833    ModuleSignature() : CurBit(0), CurValue(0) { }
1834
1835    void add(uint64_t Value, unsigned Bits);
1836    void add(StringRef Value);
1837    void flush();
1838
1839    llvm::APInt getAsInteger() const;
1840  };
1841}
1842
1843void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
1844  CurValue |= Value << CurBit;
1845  if (CurBit + NumBits < 64) {
1846    CurBit += NumBits;
1847    return;
1848  }
1849
1850  // Add the current word.
1851  Data.push_back(CurValue);
1852
1853  if (CurBit)
1854    CurValue = Value >> (64-CurBit);
1855  else
1856    CurValue = 0;
1857  CurBit = (CurBit+NumBits) & 63;
1858}
1859
1860void ModuleSignature::flush() {
1861  if (CurBit == 0)
1862    return;
1863
1864  Data.push_back(CurValue);
1865  CurBit = 0;
1866  CurValue = 0;
1867}
1868
1869void ModuleSignature::add(StringRef Value) {
1870  for (StringRef::iterator I = Value.begin(), IEnd = Value.end(); I != IEnd;++I)
1871    add(*I, 8);
1872}
1873
1874llvm::APInt ModuleSignature::getAsInteger() const {
1875  return llvm::APInt(Data.size() * 64, Data);
1876}
1877
1878std::string CompilerInvocation::getModuleHash() const {
1879  // Note: For QoI reasons, the things we use as a hash here should all be
1880  // dumped via the -module-info flag.
1881  using llvm::hash_code;
1882  using llvm::hash_value;
1883  using llvm::hash_combine;
1884
1885  // Start the signature with the compiler version.
1886  // FIXME: We'd rather use something more cryptographically sound than
1887  // CityHash, but this will do for now.
1888  hash_code code = hash_value(getClangFullRepositoryVersion());
1889
1890  // Extend the signature with the language options
1891#define LANGOPT(Name, Bits, Default, Description) \
1892   code = hash_combine(code, LangOpts->Name);
1893#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
1894  code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
1895#define BENIGN_LANGOPT(Name, Bits, Default, Description)
1896#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
1897#include "clang/Basic/LangOptions.def"
1898
1899  // Extend the signature with the target options.
1900  code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
1901                      TargetOpts->ABI);
1902  for (unsigned i = 0, n = TargetOpts->FeaturesAsWritten.size(); i != n; ++i)
1903    code = hash_combine(code, TargetOpts->FeaturesAsWritten[i]);
1904
1905  // Extend the signature with preprocessor options.
1906  const PreprocessorOptions &ppOpts = getPreprocessorOpts();
1907  const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
1908  code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
1909
1910  for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
1911            I = getPreprocessorOpts().Macros.begin(),
1912         IEnd = getPreprocessorOpts().Macros.end();
1913       I != IEnd; ++I) {
1914    // If we're supposed to ignore this macro for the purposes of modules,
1915    // don't put it into the hash.
1916    if (!hsOpts.ModulesIgnoreMacros.empty()) {
1917      // Check whether we're ignoring this macro.
1918      StringRef MacroDef = I->first;
1919      if (hsOpts.ModulesIgnoreMacros.count(MacroDef.split('=').first))
1920        continue;
1921    }
1922
1923    code = hash_combine(code, I->first, I->second);
1924  }
1925
1926  // Extend the signature with the sysroot.
1927  code = hash_combine(code, hsOpts.Sysroot, hsOpts.UseBuiltinIncludes,
1928                      hsOpts.UseStandardSystemIncludes,
1929                      hsOpts.UseStandardCXXIncludes,
1930                      hsOpts.UseLibcxx);
1931  code = hash_combine(code, hsOpts.ResourceDir);
1932
1933  // Extend the signature with the user build path.
1934  code = hash_combine(code, hsOpts.ModuleUserBuildPath);
1935
1936  // Darwin-specific hack: if we have a sysroot, use the contents and
1937  // modification time of
1938  //   $sysroot/System/Library/CoreServices/SystemVersion.plist
1939  // as part of the module hash.
1940  if (!hsOpts.Sysroot.empty()) {
1941    SmallString<128> systemVersionFile;
1942    systemVersionFile += hsOpts.Sysroot;
1943    llvm::sys::path::append(systemVersionFile, "System");
1944    llvm::sys::path::append(systemVersionFile, "Library");
1945    llvm::sys::path::append(systemVersionFile, "CoreServices");
1946    llvm::sys::path::append(systemVersionFile, "SystemVersion.plist");
1947
1948    llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> buffer =
1949        llvm::MemoryBuffer::getFile(systemVersionFile.str());
1950    if (buffer) {
1951      code = hash_combine(code, buffer.get()->getBuffer());
1952
1953      struct stat statBuf;
1954      if (stat(systemVersionFile.c_str(), &statBuf) == 0)
1955        code = hash_combine(code, statBuf.st_mtime);
1956    }
1957  }
1958
1959  return llvm::APInt(64, code).toString(36, /*Signed=*/false);
1960}
1961
1962namespace clang {
1963
1964template<typename IntTy>
1965static IntTy getLastArgIntValueImpl(const ArgList &Args, OptSpecifier Id,
1966                                    IntTy Default,
1967                                    DiagnosticsEngine *Diags) {
1968  IntTy Res = Default;
1969  if (Arg *A = Args.getLastArg(Id)) {
1970    if (StringRef(A->getValue()).getAsInteger(10, Res)) {
1971      if (Diags)
1972        Diags->Report(diag::err_drv_invalid_int_value) << A->getAsString(Args)
1973                                                       << A->getValue();
1974    }
1975  }
1976  return Res;
1977}
1978
1979
1980// Declared in clang/Frontend/Utils.h.
1981int getLastArgIntValue(const ArgList &Args, OptSpecifier Id, int Default,
1982                       DiagnosticsEngine *Diags) {
1983  return getLastArgIntValueImpl<int>(Args, Id, Default, Diags);
1984}
1985
1986uint64_t getLastArgUInt64Value(const ArgList &Args, OptSpecifier Id,
1987                               uint64_t Default,
1988                               DiagnosticsEngine *Diags) {
1989  return getLastArgIntValueImpl<uint64_t>(Args, Id, Default, Diags);
1990}
1991
1992void BuryPointer(const void *Ptr) {
1993  // This function may be called only a small fixed amount of times per each
1994  // invocation, otherwise we do actually have a leak which we want to report.
1995  // If this function is called more than kGraveYardMaxSize times, the pointers
1996  // will not be properly buried and a leak detector will report a leak, which
1997  // is what we want in such case.
1998  static const size_t kGraveYardMaxSize = 16;
1999  LLVM_ATTRIBUTE_UNUSED static const void *GraveYard[kGraveYardMaxSize];
2000  static std::atomic<unsigned> GraveYardSize;
2001  unsigned Idx = GraveYardSize++;
2002  if (Idx >= kGraveYardMaxSize)
2003    return;
2004  GraveYard[Idx] = Ptr;
2005}
2006
2007IntrusiveRefCntPtr<vfs::FileSystem>
2008createVFSFromCompilerInvocation(const CompilerInvocation &CI,
2009                                DiagnosticsEngine &Diags) {
2010  if (CI.getHeaderSearchOpts().VFSOverlayFiles.empty())
2011    return vfs::getRealFileSystem();
2012
2013  IntrusiveRefCntPtr<vfs::OverlayFileSystem>
2014    Overlay(new vfs::OverlayFileSystem(vfs::getRealFileSystem()));
2015  // earlier vfs files are on the bottom
2016  for (const std::string &File : CI.getHeaderSearchOpts().VFSOverlayFiles) {
2017    llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Buffer =
2018        llvm::MemoryBuffer::getFile(File);
2019    if (!Buffer) {
2020      Diags.Report(diag::err_missing_vfs_overlay_file) << File;
2021      return IntrusiveRefCntPtr<vfs::FileSystem>();
2022    }
2023
2024    IntrusiveRefCntPtr<vfs::FileSystem> FS =
2025        vfs::getVFSFromYAML(Buffer->release(), /*DiagHandler*/ nullptr);
2026    if (!FS.get()) {
2027      Diags.Report(diag::err_invalid_vfs_overlay) << File;
2028      return IntrusiveRefCntPtr<vfs::FileSystem>();
2029    }
2030    Overlay->pushOverlay(FS);
2031  }
2032  return Overlay;
2033}
2034} // end namespace clang
2035