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 addWarningArgs(ArgList &Args, std::vector<std::string> &Warnings) {
115  for (arg_iterator I = Args.filtered_begin(OPT_W_Group),
116         E = Args.filtered_end(); I != E; ++I) {
117    Arg *A = *I;
118    // If the argument is a pure flag, add its name (minus the "W" at the beginning)
119    // to the warning list. Else, add its value (for the OPT_W case).
120    if (A->getOption().getKind() == Option::FlagClass) {
121      Warnings.push_back(A->getOption().getName().substr(1));
122    } else {
123      for (unsigned Idx = 0, End = A->getNumValues();
124           Idx < End; ++Idx) {
125        StringRef V = A->getValue(Idx);
126        // "-Wl," and such are not warning options.
127        // FIXME: Should be handled by putting these in separate flags.
128        if (V.startswith("l,") || V.startswith("a,") || V.startswith("p,"))
129          continue;
130
131        Warnings.push_back(V);
132      }
133    }
134  }
135}
136
137static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
138                              DiagnosticsEngine &Diags) {
139  using namespace options;
140  bool Success = true;
141  if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
142    StringRef Name = A->getValue();
143    AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
144#define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
145      .Case(CMDFLAG, NAME##Model)
146#include "clang/StaticAnalyzer/Core/Analyses.def"
147      .Default(NumStores);
148    if (Value == NumStores) {
149      Diags.Report(diag::err_drv_invalid_value)
150        << A->getAsString(Args) << Name;
151      Success = false;
152    } else {
153      Opts.AnalysisStoreOpt = Value;
154    }
155  }
156
157  if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
158    StringRef Name = A->getValue();
159    AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
160#define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
161      .Case(CMDFLAG, NAME##Model)
162#include "clang/StaticAnalyzer/Core/Analyses.def"
163      .Default(NumConstraints);
164    if (Value == NumConstraints) {
165      Diags.Report(diag::err_drv_invalid_value)
166        << A->getAsString(Args) << Name;
167      Success = false;
168    } else {
169      Opts.AnalysisConstraintsOpt = Value;
170    }
171  }
172
173  if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
174    StringRef Name = A->getValue();
175    AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
176#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN) \
177      .Case(CMDFLAG, PD_##NAME)
178#include "clang/StaticAnalyzer/Core/Analyses.def"
179      .Default(NUM_ANALYSIS_DIAG_CLIENTS);
180    if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
181      Diags.Report(diag::err_drv_invalid_value)
182        << A->getAsString(Args) << Name;
183      Success = false;
184    } else {
185      Opts.AnalysisDiagOpt = Value;
186    }
187  }
188
189  if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
190    StringRef Name = A->getValue();
191    AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
192#define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
193      .Case(CMDFLAG, NAME)
194#include "clang/StaticAnalyzer/Core/Analyses.def"
195      .Default(NumPurgeModes);
196    if (Value == NumPurgeModes) {
197      Diags.Report(diag::err_drv_invalid_value)
198        << A->getAsString(Args) << Name;
199      Success = false;
200    } else {
201      Opts.AnalysisPurgeOpt = Value;
202    }
203  }
204
205  if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
206    StringRef Name = A->getValue();
207    AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
208#define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
209      .Case(CMDFLAG, NAME)
210#include "clang/StaticAnalyzer/Core/Analyses.def"
211      .Default(NumInliningModes);
212    if (Value == NumInliningModes) {
213      Diags.Report(diag::err_drv_invalid_value)
214        << A->getAsString(Args) << Name;
215      Success = false;
216    } else {
217      Opts.InliningMode = Value;
218    }
219  }
220
221  Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
222  Opts.visualizeExplodedGraphWithGraphViz =
223    Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
224  Opts.visualizeExplodedGraphWithUbiGraph =
225    Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
226  Opts.NoRetryExhausted = Args.hasArg(OPT_analyzer_disable_retry_exhausted);
227  Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
228  Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
229  Opts.AnalyzeNestedBlocks =
230    Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
231  Opts.eagerlyAssumeBinOpBifurcation = Args.hasArg(OPT_analyzer_eagerly_assume);
232  Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
233  Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
234  Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
235  Opts.maxBlockVisitOnPath =
236      getLastArgIntValue(Args, OPT_analyzer_max_loop, 4, Diags);
237  Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
238  Opts.InlineMaxStackDepth =
239      getLastArgIntValue(Args, OPT_analyzer_inline_max_stack_depth,
240                         Opts.InlineMaxStackDepth, Diags);
241
242  Opts.CheckersControlList.clear();
243  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_checker,
244                                             OPT_analyzer_disable_checker),
245         ie = Args.filtered_end(); it != ie; ++it) {
246    const Arg *A = *it;
247    A->claim();
248    bool enable = (A->getOption().getID() == OPT_analyzer_checker);
249    // We can have a list of comma separated checker names, e.g:
250    // '-analyzer-checker=cocoa,unix'
251    StringRef checkerList = A->getValue();
252    SmallVector<StringRef, 4> checkers;
253    checkerList.split(checkers, ",");
254    for (unsigned i = 0, e = checkers.size(); i != e; ++i)
255      Opts.CheckersControlList.push_back(std::make_pair(checkers[i], enable));
256  }
257
258  // Go through the analyzer configuration options.
259  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_config),
260       ie = Args.filtered_end(); it != ie; ++it) {
261    const Arg *A = *it;
262    A->claim();
263    // We can have a list of comma separated config names, e.g:
264    // '-analyzer-config key1=val1,key2=val2'
265    StringRef configList = A->getValue();
266    SmallVector<StringRef, 4> configVals;
267    configList.split(configVals, ",");
268    for (unsigned i = 0, e = configVals.size(); i != e; ++i) {
269      StringRef key, val;
270      std::tie(key, val) = configVals[i].split("=");
271      if (val.empty()) {
272        Diags.Report(SourceLocation(),
273                     diag::err_analyzer_config_no_value) << configVals[i];
274        Success = false;
275        break;
276      }
277      if (val.find('=') != StringRef::npos) {
278        Diags.Report(SourceLocation(),
279                     diag::err_analyzer_config_multiple_values)
280          << configVals[i];
281        Success = false;
282        break;
283      }
284      Opts.Config[key] = val;
285    }
286  }
287
288  return Success;
289}
290
291static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
292  Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
293  Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
294  return true;
295}
296
297static void ParseCommentArgs(CommentOptions &Opts, ArgList &Args) {
298  Opts.BlockCommandNames = Args.getAllArgValues(OPT_fcomment_block_commands);
299  Opts.ParseAllComments = Args.hasArg(OPT_fparse_all_comments);
300}
301
302static StringRef getCodeModel(ArgList &Args, DiagnosticsEngine &Diags) {
303  if (Arg *A = Args.getLastArg(OPT_mcode_model)) {
304    StringRef Value = A->getValue();
305    if (Value == "small" || Value == "kernel" || Value == "medium" ||
306        Value == "large")
307      return Value;
308    Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Value;
309  }
310  return "default";
311}
312
313/// \brief Create a new Regex instance out of the string value in \p RpassArg.
314/// It returns a pointer to the newly generated Regex instance.
315static std::shared_ptr<llvm::Regex>
316GenerateOptimizationRemarkRegex(DiagnosticsEngine &Diags, ArgList &Args,
317                                Arg *RpassArg) {
318  StringRef Val = RpassArg->getValue();
319  std::string RegexError;
320  std::shared_ptr<llvm::Regex> Pattern = std::make_shared<llvm::Regex>(Val);
321  if (!Pattern->isValid(RegexError)) {
322    Diags.Report(diag::err_drv_optimization_remark_pattern)
323        << RegexError << RpassArg->getAsString(Args);
324    Pattern.reset();
325  }
326  return Pattern;
327}
328
329static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
330                             DiagnosticsEngine &Diags,
331                             const TargetOptions &TargetOpts) {
332  using namespace options;
333  bool Success = true;
334
335  Opts.OptimizationLevel = getOptimizationLevel(Args, IK, Diags);
336  // TODO: This could be done in Driver
337  unsigned MaxOptLevel = 3;
338  if (Opts.OptimizationLevel > MaxOptLevel) {
339    // If the optimization level is not supported, fall back on the default optimization
340    Diags.Report(diag::warn_drv_optimization_value)
341        << Args.getLastArg(OPT_O)->getAsString(Args) << "-O" << MaxOptLevel;
342    Opts.OptimizationLevel = MaxOptLevel;
343  }
344
345  // We must always run at least the always inlining pass.
346  Opts.setInlining(
347    (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
348                                 : CodeGenOptions::OnlyAlwaysInlining);
349  // -fno-inline-functions overrides OptimizationLevel > 1.
350  Opts.NoInline = Args.hasArg(OPT_fno_inline);
351  Opts.setInlining(Args.hasArg(OPT_fno_inline_functions) ?
352                     CodeGenOptions::OnlyAlwaysInlining : Opts.getInlining());
353
354  if (Args.hasArg(OPT_gline_tables_only)) {
355    Opts.setDebugInfo(CodeGenOptions::DebugLineTablesOnly);
356  } else if (Args.hasArg(OPT_g_Flag) || Args.hasArg(OPT_gdwarf_2) ||
357             Args.hasArg(OPT_gdwarf_3) || Args.hasArg(OPT_gdwarf_4)) {
358    bool Default = false;
359    // Until dtrace (via CTF) and LLDB can deal with distributed debug info,
360    // Darwin and FreeBSD default to standalone/full debug info.
361    if (llvm::Triple(TargetOpts.Triple).isOSDarwin() ||
362        llvm::Triple(TargetOpts.Triple).isOSFreeBSD())
363      Default = true;
364
365    if (Args.hasFlag(OPT_fstandalone_debug, OPT_fno_standalone_debug, Default))
366      Opts.setDebugInfo(CodeGenOptions::FullDebugInfo);
367    else
368      Opts.setDebugInfo(CodeGenOptions::LimitedDebugInfo);
369  }
370  Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
371  Opts.SplitDwarfFile = Args.getLastArgValue(OPT_split_dwarf_file);
372  if (Args.hasArg(OPT_gdwarf_2))
373    Opts.DwarfVersion = 2;
374  else if (Args.hasArg(OPT_gdwarf_3))
375    Opts.DwarfVersion = 3;
376  else if (Args.hasArg(OPT_gdwarf_4))
377    Opts.DwarfVersion = 4;
378  else if (Opts.getDebugInfo() != CodeGenOptions::NoDebugInfo)
379    // Default Dwarf version is 4 if we are generating debug information.
380    Opts.DwarfVersion = 4;
381
382  Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
383  Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
384  Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
385  Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
386    OPT_fuse_register_sized_bitfield_access);
387  Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
388  Opts.StructPathTBAA = !Args.hasArg(OPT_no_struct_path_tbaa);
389  Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
390  Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
391  Opts.NoCommon = Args.hasArg(OPT_fno_common);
392  Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
393  Opts.OptimizeSize = getOptimizationLevelSize(Args);
394  Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
395                            Args.hasArg(OPT_ffreestanding));
396  Opts.UnrollLoops =
397      Args.hasFlag(OPT_funroll_loops, OPT_fno_unroll_loops,
398                   (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize));
399  Opts.RerollLoops = Args.hasArg(OPT_freroll_loops);
400
401  Opts.DisableIntegratedAS = Args.hasArg(OPT_fno_integrated_as);
402  Opts.Autolink = !Args.hasArg(OPT_fno_autolink);
403  Opts.SampleProfileFile = Args.getLastArgValue(OPT_fprofile_sample_use_EQ);
404  Opts.ProfileInstrGenerate = Args.hasArg(OPT_fprofile_instr_generate);
405  Opts.InstrProfileInput = Args.getLastArgValue(OPT_fprofile_instr_use_EQ);
406  Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
407  Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
408  Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);
409  Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
410  Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
411  Opts.CodeModel = getCodeModel(Args, Diags);
412  Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
413  Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
414  Opts.DisableFree = Args.hasArg(OPT_disable_free);
415  Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
416  Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
417  Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
418  Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
419  Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
420                       Args.hasArg(OPT_cl_finite_math_only)||
421                       Args.hasArg(OPT_cl_fast_relaxed_math));
422  Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
423                       Args.hasArg(OPT_cl_finite_math_only)||
424                       Args.hasArg(OPT_cl_fast_relaxed_math));
425  Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
426  Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
427  Opts.NumRegisterParameters = getLastArgIntValue(Args, OPT_mregparm, 0, Diags);
428  Opts.NoGlobalMerge = Args.hasArg(OPT_mno_global_merge);
429  Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
430  Opts.EnableSegmentedStacks = Args.hasArg(OPT_split_stacks);
431  Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
432  Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
433  Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
434  Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
435  Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
436  Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
437  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
438                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
439                      Args.hasArg(OPT_cl_fast_relaxed_math);
440  Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
441  Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
442  Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
443  Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
444
445  Opts.FunctionSections = Args.hasFlag(OPT_ffunction_sections,
446                                       OPT_fno_function_sections, false);
447  Opts.DataSections = Args.hasFlag(OPT_fdata_sections,
448                                   OPT_fno_data_sections, false);
449
450  Opts.VectorizeBB = Args.hasArg(OPT_vectorize_slp_aggressive);
451  Opts.VectorizeLoop = Args.hasArg(OPT_vectorize_loops);
452  Opts.VectorizeSLP = Args.hasArg(OPT_vectorize_slp);
453
454  Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
455  Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
456  Opts.SanitizeRecover = !Args.hasArg(OPT_fno_sanitize_recover);
457
458  Opts.DisableGCov = Args.hasArg(OPT_test_coverage);
459  Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
460  Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
461  if (Opts.EmitGcovArcs || Opts.EmitGcovNotes) {
462  Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
463    Opts.CoverageExtraChecksum = Args.hasArg(OPT_coverage_cfg_checksum);
464    Opts.CoverageNoFunctionNamesInData =
465        Args.hasArg(OPT_coverage_no_function_names_in_data);
466    if (Args.hasArg(OPT_coverage_version_EQ)) {
467      StringRef CoverageVersion = Args.getLastArgValue(OPT_coverage_version_EQ);
468      if (CoverageVersion.size() != 4) {
469        Diags.Report(diag::err_drv_invalid_value)
470            << Args.getLastArg(OPT_coverage_version_EQ)->getAsString(Args)
471            << CoverageVersion;
472      } else {
473        memcpy(Opts.CoverageVersion, CoverageVersion.data(), 4);
474      }
475    }
476  }
477
478  Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
479  Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
480  Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
481  Opts.CompressDebugSections = Args.hasArg(OPT_compress_debug_sections);
482  Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
483  Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
484  Opts.SanitizerBlacklistFile = Args.getLastArgValue(OPT_fsanitize_blacklist);
485  Opts.SanitizeMemoryTrackOrigins =
486      getLastArgIntValue(Args, OPT_fsanitize_memory_track_origins_EQ, 0, Diags);
487  Opts.SanitizeUndefinedTrapOnError =
488      Args.hasArg(OPT_fsanitize_undefined_trap_on_error);
489  Opts.SSPBufferSize =
490      getLastArgIntValue(Args, OPT_stack_protector_buffer_size, 8, Diags);
491  Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
492  if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
493    StringRef Val = A->getValue();
494    unsigned StackAlignment = Opts.StackAlignment;
495    Val.getAsInteger(10, StackAlignment);
496    Opts.StackAlignment = StackAlignment;
497  }
498
499  if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
500    StringRef Name = A->getValue();
501    unsigned Method = llvm::StringSwitch<unsigned>(Name)
502      .Case("legacy", CodeGenOptions::Legacy)
503      .Case("non-legacy", CodeGenOptions::NonLegacy)
504      .Case("mixed", CodeGenOptions::Mixed)
505      .Default(~0U);
506    if (Method == ~0U) {
507      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
508      Success = false;
509    } else {
510      Opts.setObjCDispatchMethod(
511        static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
512    }
513  }
514
515  if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
516    StringRef Name = A->getValue();
517    unsigned Model = llvm::StringSwitch<unsigned>(Name)
518        .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
519        .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
520        .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
521        .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
522        .Default(~0U);
523    if (Model == ~0U) {
524      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
525      Success = false;
526    } else {
527      Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
528    }
529  }
530
531  if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
532    StringRef Val = A->getValue();
533    if (Val == "fast")
534      Opts.setFPContractMode(CodeGenOptions::FPC_Fast);
535    else if (Val == "on")
536      Opts.setFPContractMode(CodeGenOptions::FPC_On);
537    else if (Val == "off")
538      Opts.setFPContractMode(CodeGenOptions::FPC_Off);
539    else
540      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
541  }
542
543  if (Arg *A = Args.getLastArg(OPT_fpcc_struct_return, OPT_freg_struct_return)) {
544    if (A->getOption().matches(OPT_fpcc_struct_return)) {
545      Opts.setStructReturnConvention(CodeGenOptions::SRCK_OnStack);
546    } else {
547      assert(A->getOption().matches(OPT_freg_struct_return));
548      Opts.setStructReturnConvention(CodeGenOptions::SRCK_InRegs);
549    }
550  }
551
552  Opts.DependentLibraries = Args.getAllArgValues(OPT_dependent_lib);
553  bool NeedLocTracking = false;
554
555  if (Arg *A = Args.getLastArg(OPT_Rpass_EQ)) {
556    Opts.OptimizationRemarkPattern =
557        GenerateOptimizationRemarkRegex(Diags, Args, A);
558    NeedLocTracking = true;
559  }
560
561  if (Arg *A = Args.getLastArg(OPT_Rpass_missed_EQ)) {
562    Opts.OptimizationRemarkMissedPattern =
563        GenerateOptimizationRemarkRegex(Diags, Args, A);
564    NeedLocTracking = true;
565  }
566
567  if (Arg *A = Args.getLastArg(OPT_Rpass_analysis_EQ)) {
568    Opts.OptimizationRemarkAnalysisPattern =
569        GenerateOptimizationRemarkRegex(Diags, Args, A);
570    NeedLocTracking = true;
571  }
572
573  // If the user requested one of the flags in the -Rpass family, make sure
574  // that the backend tracks source location information.
575  if (NeedLocTracking && Opts.getDebugInfo() == CodeGenOptions::NoDebugInfo)
576    Opts.setDebugInfo(CodeGenOptions::LocTrackingOnly);
577
578  return Success;
579}
580
581static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
582                                      ArgList &Args) {
583  using namespace options;
584  Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
585  Opts.Targets = Args.getAllArgValues(OPT_MT);
586  Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
587  Opts.IncludeModuleFiles = Args.hasArg(OPT_module_file_deps);
588  Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
589  Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
590  Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
591  Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
592  Opts.PrintShowIncludes = Args.hasArg(OPT_show_includes);
593  Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
594  Opts.ModuleDependencyOutputDir =
595      Args.getLastArgValue(OPT_module_dependency_dir);
596}
597
598bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
599                                DiagnosticsEngine *Diags) {
600  using namespace options;
601  bool Success = true;
602
603  Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
604  Opts.DiagnosticSerializationFile =
605    Args.getLastArgValue(OPT_diagnostic_serialized_file);
606  Opts.IgnoreWarnings = Args.hasArg(OPT_w);
607  Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
608  Opts.Pedantic = Args.hasArg(OPT_pedantic);
609  Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
610  Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
611  Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
612  Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
613                                 OPT_fno_show_column,
614                                 /*Default=*/true);
615  Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
616  Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
617  Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
618
619  llvm::sys::Process::UseANSIEscapeCodes(Args.hasArg(OPT_fansi_escape_codes));
620
621  // Default behavior is to not to show note include stacks.
622  Opts.ShowNoteIncludeStack = false;
623  if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
624                               OPT_fno_diagnostics_show_note_include_stack))
625    if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
626      Opts.ShowNoteIncludeStack = true;
627
628  StringRef ShowOverloads =
629    Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
630  if (ShowOverloads == "best")
631    Opts.setShowOverloads(Ovl_Best);
632  else if (ShowOverloads == "all")
633    Opts.setShowOverloads(Ovl_All);
634  else {
635    Success = false;
636    if (Diags)
637      Diags->Report(diag::err_drv_invalid_value)
638      << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
639      << ShowOverloads;
640  }
641
642  StringRef ShowCategory =
643    Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
644  if (ShowCategory == "none")
645    Opts.ShowCategories = 0;
646  else if (ShowCategory == "id")
647    Opts.ShowCategories = 1;
648  else if (ShowCategory == "name")
649    Opts.ShowCategories = 2;
650  else {
651    Success = false;
652    if (Diags)
653      Diags->Report(diag::err_drv_invalid_value)
654      << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
655      << ShowCategory;
656  }
657
658  StringRef Format =
659    Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
660  if (Format == "clang")
661    Opts.setFormat(DiagnosticOptions::Clang);
662  else if (Format == "msvc")
663    Opts.setFormat(DiagnosticOptions::Msvc);
664  else if (Format == "msvc-fallback") {
665    Opts.setFormat(DiagnosticOptions::Msvc);
666    Opts.CLFallbackMode = true;
667  } else if (Format == "vi")
668    Opts.setFormat(DiagnosticOptions::Vi);
669  else {
670    Success = false;
671    if (Diags)
672      Diags->Report(diag::err_drv_invalid_value)
673      << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
674      << Format;
675  }
676
677  Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
678  Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
679  Opts.ShowPresumedLoc = !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
680  Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
681  Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
682  Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
683  Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
684  Opts.MacroBacktraceLimit =
685      getLastArgIntValue(Args, OPT_fmacro_backtrace_limit,
686                         DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
687  Opts.TemplateBacktraceLimit = getLastArgIntValue(
688      Args, OPT_ftemplate_backtrace_limit,
689      DiagnosticOptions::DefaultTemplateBacktraceLimit, Diags);
690  Opts.ConstexprBacktraceLimit = getLastArgIntValue(
691      Args, OPT_fconstexpr_backtrace_limit,
692      DiagnosticOptions::DefaultConstexprBacktraceLimit, Diags);
693  Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
694                                    DiagnosticOptions::DefaultTabStop, Diags);
695  if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
696    Opts.TabStop = DiagnosticOptions::DefaultTabStop;
697    if (Diags)
698      Diags->Report(diag::warn_ignoring_ftabstop_value)
699      << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
700  }
701  Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
702  addWarningArgs(Args, Opts.Warnings);
703
704  return Success;
705}
706
707static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
708  Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
709}
710
711static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
712                                   DiagnosticsEngine &Diags) {
713  using namespace options;
714  Opts.ProgramAction = frontend::ParseSyntaxOnly;
715  if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
716    switch (A->getOption().getID()) {
717    default:
718      llvm_unreachable("Invalid option in group!");
719    case OPT_ast_list:
720      Opts.ProgramAction = frontend::ASTDeclList; break;
721    case OPT_ast_dump:
722      Opts.ProgramAction = frontend::ASTDump; break;
723    case OPT_ast_print:
724      Opts.ProgramAction = frontend::ASTPrint; break;
725    case OPT_ast_view:
726      Opts.ProgramAction = frontend::ASTView; break;
727    case OPT_dump_raw_tokens:
728      Opts.ProgramAction = frontend::DumpRawTokens; break;
729    case OPT_dump_tokens:
730      Opts.ProgramAction = frontend::DumpTokens; break;
731    case OPT_S:
732      Opts.ProgramAction = frontend::EmitAssembly; break;
733    case OPT_emit_llvm_bc:
734      Opts.ProgramAction = frontend::EmitBC; break;
735    case OPT_emit_html:
736      Opts.ProgramAction = frontend::EmitHTML; break;
737    case OPT_emit_llvm:
738      Opts.ProgramAction = frontend::EmitLLVM; break;
739    case OPT_emit_llvm_only:
740      Opts.ProgramAction = frontend::EmitLLVMOnly; break;
741    case OPT_emit_codegen_only:
742      Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
743    case OPT_emit_obj:
744      Opts.ProgramAction = frontend::EmitObj; break;
745    case OPT_fixit_EQ:
746      Opts.FixItSuffix = A->getValue();
747      // fall-through!
748    case OPT_fixit:
749      Opts.ProgramAction = frontend::FixIt; break;
750    case OPT_emit_module:
751      Opts.ProgramAction = frontend::GenerateModule; break;
752    case OPT_emit_pch:
753      Opts.ProgramAction = frontend::GeneratePCH; break;
754    case OPT_emit_pth:
755      Opts.ProgramAction = frontend::GeneratePTH; break;
756    case OPT_init_only:
757      Opts.ProgramAction = frontend::InitOnly; break;
758    case OPT_fsyntax_only:
759      Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
760    case OPT_module_file_info:
761      Opts.ProgramAction = frontend::ModuleFileInfo; break;
762    case OPT_verify_pch:
763      Opts.ProgramAction = frontend::VerifyPCH; break;
764    case OPT_print_decl_contexts:
765      Opts.ProgramAction = frontend::PrintDeclContext; break;
766    case OPT_print_preamble:
767      Opts.ProgramAction = frontend::PrintPreamble; break;
768    case OPT_E:
769      Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
770    case OPT_rewrite_macros:
771      Opts.ProgramAction = frontend::RewriteMacros; break;
772    case OPT_rewrite_objc:
773      Opts.ProgramAction = frontend::RewriteObjC; break;
774    case OPT_rewrite_test:
775      Opts.ProgramAction = frontend::RewriteTest; break;
776    case OPT_analyze:
777      Opts.ProgramAction = frontend::RunAnalysis; break;
778    case OPT_migrate:
779      Opts.ProgramAction = frontend::MigrateSource; break;
780    case OPT_Eonly:
781      Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
782    }
783  }
784
785  if (const Arg* A = Args.getLastArg(OPT_plugin)) {
786    Opts.Plugins.push_back(A->getValue(0));
787    Opts.ProgramAction = frontend::PluginAction;
788    Opts.ActionName = A->getValue();
789
790    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
791           end = Args.filtered_end(); it != end; ++it) {
792      if ((*it)->getValue(0) == Opts.ActionName)
793        Opts.PluginArgs.push_back((*it)->getValue(1));
794    }
795  }
796
797  Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
798  Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
799  for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
800    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
801           end = Args.filtered_end(); it != end; ++it) {
802      if ((*it)->getValue(0) == Opts.AddPluginActions[i])
803        Opts.AddPluginArgs[i].push_back((*it)->getValue(1));
804    }
805  }
806
807  if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
808    Opts.CodeCompletionAt =
809      ParsedSourceLocation::FromString(A->getValue());
810    if (Opts.CodeCompletionAt.FileName.empty())
811      Diags.Report(diag::err_drv_invalid_value)
812        << A->getAsString(Args) << A->getValue();
813  }
814  Opts.DisableFree = Args.hasArg(OPT_disable_free);
815
816  Opts.OutputFile = Args.getLastArgValue(OPT_o);
817  Opts.Plugins = Args.getAllArgValues(OPT_load);
818  Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
819  Opts.ShowHelp = Args.hasArg(OPT_help);
820  Opts.ShowStats = Args.hasArg(OPT_print_stats);
821  Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
822  Opts.ShowVersion = Args.hasArg(OPT_version);
823  Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
824  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
825  Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
826  Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
827  Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
828  Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
829  Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
830  Opts.ASTDumpLookups = Args.hasArg(OPT_ast_dump_lookups);
831  Opts.UseGlobalModuleIndex = !Args.hasArg(OPT_fno_modules_global_index);
832  Opts.GenerateGlobalModuleIndex = Opts.UseGlobalModuleIndex;
833
834  Opts.CodeCompleteOpts.IncludeMacros
835    = Args.hasArg(OPT_code_completion_macros);
836  Opts.CodeCompleteOpts.IncludeCodePatterns
837    = Args.hasArg(OPT_code_completion_patterns);
838  Opts.CodeCompleteOpts.IncludeGlobals
839    = !Args.hasArg(OPT_no_code_completion_globals);
840  Opts.CodeCompleteOpts.IncludeBriefComments
841    = Args.hasArg(OPT_code_completion_brief_comments);
842
843  Opts.OverrideRecordLayoutsFile
844    = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
845  if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
846                                     OPT_arcmt_modify,
847                                     OPT_arcmt_migrate)) {
848    switch (A->getOption().getID()) {
849    default:
850      llvm_unreachable("missed a case");
851    case OPT_arcmt_check:
852      Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
853      break;
854    case OPT_arcmt_modify:
855      Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
856      break;
857    case OPT_arcmt_migrate:
858      Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
859      break;
860    }
861  }
862  Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
863  Opts.ARCMTMigrateReportOut
864    = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
865  Opts.ARCMTMigrateEmitARCErrors
866    = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
867
868  if (Args.hasArg(OPT_objcmt_migrate_literals))
869    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
870  if (Args.hasArg(OPT_objcmt_migrate_subscripting))
871    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
872  if (Args.hasArg(OPT_objcmt_migrate_property))
873    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Property;
874  if (Args.hasArg(OPT_objcmt_migrate_readonly_property))
875    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadonlyProperty;
876  if (Args.hasArg(OPT_objcmt_migrate_readwrite_property))
877    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadwriteProperty;
878  if (Args.hasArg(OPT_objcmt_migrate_annotation))
879    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Annotation;
880  if (Args.hasArg(OPT_objcmt_returns_innerpointer_property))
881    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReturnsInnerPointerProperty;
882  if (Args.hasArg(OPT_objcmt_migrate_instancetype))
883    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Instancetype;
884  if (Args.hasArg(OPT_objcmt_migrate_nsmacros))
885    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsMacros;
886  if (Args.hasArg(OPT_objcmt_migrate_protocol_conformance))
887    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ProtocolConformance;
888  if (Args.hasArg(OPT_objcmt_atomic_property))
889    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_AtomicProperty;
890  if (Args.hasArg(OPT_objcmt_ns_nonatomic_iosonly))
891    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsAtomicIOSOnlyProperty;
892  if (Args.hasArg(OPT_objcmt_migrate_designated_init))
893    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_DesignatedInitializer;
894  if (Args.hasArg(OPT_objcmt_migrate_all))
895    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_MigrateDecls;
896
897  Opts.ObjCMTWhiteListPath = Args.getLastArgValue(OPT_objcmt_whitelist_dir_path);
898
899  if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
900      Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
901    Diags.Report(diag::err_drv_argument_not_allowed_with)
902      << "ARC migration" << "ObjC migration";
903  }
904
905  InputKind DashX = IK_None;
906  if (const Arg *A = Args.getLastArg(OPT_x)) {
907    DashX = llvm::StringSwitch<InputKind>(A->getValue())
908      .Case("c", IK_C)
909      .Case("cl", IK_OpenCL)
910      .Case("cuda", IK_CUDA)
911      .Case("c++", IK_CXX)
912      .Case("objective-c", IK_ObjC)
913      .Case("objective-c++", IK_ObjCXX)
914      .Case("cpp-output", IK_PreprocessedC)
915      .Case("assembler-with-cpp", IK_Asm)
916      .Case("c++-cpp-output", IK_PreprocessedCXX)
917      .Case("objective-c-cpp-output", IK_PreprocessedObjC)
918      .Case("objc-cpp-output", IK_PreprocessedObjC)
919      .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
920      .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
921      .Case("c-header", IK_C)
922      .Case("cl-header", IK_OpenCL)
923      .Case("objective-c-header", IK_ObjC)
924      .Case("c++-header", IK_CXX)
925      .Case("objective-c++-header", IK_ObjCXX)
926      .Cases("ast", "pcm", IK_AST)
927      .Case("ir", IK_LLVM_IR)
928      .Default(IK_None);
929    if (DashX == IK_None)
930      Diags.Report(diag::err_drv_invalid_value)
931        << A->getAsString(Args) << A->getValue();
932  }
933
934  // '-' is the default input if none is given.
935  std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
936  Opts.Inputs.clear();
937  if (Inputs.empty())
938    Inputs.push_back("-");
939  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
940    InputKind IK = DashX;
941    if (IK == IK_None) {
942      IK = FrontendOptions::getInputKindForExtension(
943        StringRef(Inputs[i]).rsplit('.').second);
944      // FIXME: Remove this hack.
945      if (i == 0)
946        DashX = IK;
947    }
948    Opts.Inputs.push_back(FrontendInputFile(Inputs[i], IK));
949  }
950
951  return DashX;
952}
953
954std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
955                                                 void *MainAddr) {
956  SmallString<128> P(llvm::sys::fs::getMainExecutable(Argv0, MainAddr));
957
958  if (!P.empty()) {
959    llvm::sys::path::remove_filename(P); // Remove /clang from foo/bin/clang
960    llvm::sys::path::remove_filename(P); // Remove /bin   from foo/bin
961
962    // Get foo/lib/clang/<version>/include
963    llvm::sys::path::append(P, "lib", "clang", CLANG_VERSION_STRING);
964  }
965
966  return P.str();
967}
968
969static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
970  using namespace options;
971  Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
972  Opts.Verbose = Args.hasArg(OPT_v);
973  Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
974  Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
975  Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
976  if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
977    Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
978  Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
979  Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodules_cache_path);
980  Opts.ModuleUserBuildPath = Args.getLastArgValue(OPT_fmodules_user_build_path);
981  Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
982  // -fmodules implies -fmodule-maps
983  Opts.ModuleMaps = Args.hasArg(OPT_fmodule_maps) || Args.hasArg(OPT_fmodules);
984  Opts.ModuleCachePruneInterval =
985      getLastArgIntValue(Args, OPT_fmodules_prune_interval, 7 * 24 * 60 * 60);
986  Opts.ModuleCachePruneAfter =
987      getLastArgIntValue(Args, OPT_fmodules_prune_after, 31 * 24 * 60 * 60);
988  Opts.ModulesValidateOncePerBuildSession =
989      Args.hasArg(OPT_fmodules_validate_once_per_build_session);
990  Opts.BuildSessionTimestamp =
991      getLastArgUInt64Value(Args, OPT_fbuild_session_timestamp, 0);
992  Opts.ModulesValidateSystemHeaders =
993      Args.hasArg(OPT_fmodules_validate_system_headers);
994
995  for (arg_iterator it = Args.filtered_begin(OPT_fmodules_ignore_macro),
996                    ie = Args.filtered_end();
997       it != ie; ++it) {
998    StringRef MacroDef = (*it)->getValue();
999    Opts.ModulesIgnoreMacros.insert(MacroDef.split('=').first);
1000  }
1001  std::vector<std::string> ModuleMapFiles =
1002      Args.getAllArgValues(OPT_fmodule_map_file);
1003  Opts.ModuleMapFiles.insert(ModuleMapFiles.begin(), ModuleMapFiles.end());
1004
1005  // Add -I..., -F..., and -index-header-map options in order.
1006  bool IsIndexHeaderMap = false;
1007  for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F,
1008                                             OPT_index_header_map),
1009       ie = Args.filtered_end(); it != ie; ++it) {
1010    if ((*it)->getOption().matches(OPT_index_header_map)) {
1011      // -index-header-map applies to the next -I or -F.
1012      IsIndexHeaderMap = true;
1013      continue;
1014    }
1015
1016    frontend::IncludeDirGroup Group
1017      = IsIndexHeaderMap? frontend::IndexHeaderMap : frontend::Angled;
1018
1019    Opts.AddPath((*it)->getValue(), Group,
1020                 /*IsFramework=*/ (*it)->getOption().matches(OPT_F), true);
1021    IsIndexHeaderMap = false;
1022  }
1023
1024  // Add -iprefix/-iwithprefix/-iwithprefixbefore options.
1025  StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1026  for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1027                                             OPT_iwithprefixbefore),
1028         ie = Args.filtered_end(); it != ie; ++it) {
1029    const Arg *A = *it;
1030    if (A->getOption().matches(OPT_iprefix))
1031      Prefix = A->getValue();
1032    else if (A->getOption().matches(OPT_iwithprefix))
1033      Opts.AddPath(Prefix.str() + A->getValue(),
1034                   frontend::After, false, true);
1035    else
1036      Opts.AddPath(Prefix.str() + A->getValue(),
1037                   frontend::Angled, false, true);
1038  }
1039
1040  for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1041         ie = Args.filtered_end(); it != ie; ++it)
1042    Opts.AddPath((*it)->getValue(), frontend::After, false, true);
1043  for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1044         ie = Args.filtered_end(); it != ie; ++it)
1045    Opts.AddPath((*it)->getValue(), frontend::Quoted, false, true);
1046  for (arg_iterator it = Args.filtered_begin(OPT_isystem,
1047         OPT_iwithsysroot), ie = Args.filtered_end(); it != ie; ++it)
1048    Opts.AddPath((*it)->getValue(), frontend::System, false,
1049                 !(*it)->getOption().matches(OPT_iwithsysroot));
1050  for (arg_iterator it = Args.filtered_begin(OPT_iframework),
1051         ie = Args.filtered_end(); it != ie; ++it)
1052    Opts.AddPath((*it)->getValue(), frontend::System, true, true);
1053
1054  // Add the paths for the various language specific isystem flags.
1055  for (arg_iterator it = Args.filtered_begin(OPT_c_isystem),
1056       ie = Args.filtered_end(); it != ie; ++it)
1057    Opts.AddPath((*it)->getValue(), frontend::CSystem, false, true);
1058  for (arg_iterator it = Args.filtered_begin(OPT_cxx_isystem),
1059       ie = Args.filtered_end(); it != ie; ++it)
1060    Opts.AddPath((*it)->getValue(), frontend::CXXSystem, false, true);
1061  for (arg_iterator it = Args.filtered_begin(OPT_objc_isystem),
1062       ie = Args.filtered_end(); it != ie; ++it)
1063    Opts.AddPath((*it)->getValue(), frontend::ObjCSystem, false,true);
1064  for (arg_iterator it = Args.filtered_begin(OPT_objcxx_isystem),
1065       ie = Args.filtered_end(); it != ie; ++it)
1066    Opts.AddPath((*it)->getValue(), frontend::ObjCXXSystem, false, true);
1067
1068  // Add the internal paths from a driver that detects standard include paths.
1069  for (arg_iterator I = Args.filtered_begin(OPT_internal_isystem,
1070                                            OPT_internal_externc_isystem),
1071                    E = Args.filtered_end();
1072       I != E; ++I) {
1073    frontend::IncludeDirGroup Group = frontend::System;
1074    if ((*I)->getOption().matches(OPT_internal_externc_isystem))
1075      Group = frontend::ExternCSystem;
1076    Opts.AddPath((*I)->getValue(), Group, false, true);
1077  }
1078
1079  // Add the path prefixes which are implicitly treated as being system headers.
1080  for (arg_iterator I = Args.filtered_begin(OPT_system_header_prefix,
1081                                            OPT_no_system_header_prefix),
1082                    E = Args.filtered_end();
1083       I != E; ++I)
1084    Opts.AddSystemHeaderPrefix(
1085        (*I)->getValue(), (*I)->getOption().matches(OPT_system_header_prefix));
1086
1087  for (arg_iterator I = Args.filtered_begin(OPT_ivfsoverlay),
1088       E = Args.filtered_end(); I != E; ++I)
1089    Opts.AddVFSOverlayFile((*I)->getValue());
1090}
1091
1092void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
1093                                         LangStandard::Kind LangStd) {
1094  // Set some properties which depend solely on the input kind; it would be nice
1095  // to move these to the language standard, and have the driver resolve the
1096  // input kind + language standard.
1097  if (IK == IK_Asm) {
1098    Opts.AsmPreprocessor = 1;
1099  } else if (IK == IK_ObjC ||
1100             IK == IK_ObjCXX ||
1101             IK == IK_PreprocessedObjC ||
1102             IK == IK_PreprocessedObjCXX) {
1103    Opts.ObjC1 = Opts.ObjC2 = 1;
1104  }
1105
1106  if (LangStd == LangStandard::lang_unspecified) {
1107    // Based on the base language, pick one.
1108    switch (IK) {
1109    case IK_None:
1110    case IK_AST:
1111    case IK_LLVM_IR:
1112      llvm_unreachable("Invalid input kind!");
1113    case IK_OpenCL:
1114      LangStd = LangStandard::lang_opencl;
1115      break;
1116    case IK_CUDA:
1117      LangStd = LangStandard::lang_cuda;
1118      break;
1119    case IK_Asm:
1120    case IK_C:
1121    case IK_PreprocessedC:
1122    case IK_ObjC:
1123    case IK_PreprocessedObjC:
1124      LangStd = LangStandard::lang_gnu99;
1125      break;
1126    case IK_CXX:
1127    case IK_PreprocessedCXX:
1128    case IK_ObjCXX:
1129    case IK_PreprocessedObjCXX:
1130      LangStd = LangStandard::lang_gnucxx98;
1131      break;
1132    }
1133  }
1134
1135  const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1136  Opts.LineComment = Std.hasLineComments();
1137  Opts.C99 = Std.isC99();
1138  Opts.C11 = Std.isC11();
1139  Opts.CPlusPlus = Std.isCPlusPlus();
1140  Opts.CPlusPlus11 = Std.isCPlusPlus11();
1141  Opts.CPlusPlus1y = Std.isCPlusPlus1y();
1142  Opts.CPlusPlus1z = Std.isCPlusPlus1z();
1143  Opts.Digraphs = Std.hasDigraphs();
1144  Opts.GNUMode = Std.isGNUMode();
1145  Opts.GNUInline = !Std.isC99();
1146  Opts.HexFloats = Std.hasHexFloats();
1147  Opts.ImplicitInt = Std.hasImplicitInt();
1148
1149  // Set OpenCL Version.
1150  Opts.OpenCL = LangStd == LangStandard::lang_opencl || IK == IK_OpenCL;
1151  if (LangStd == LangStandard::lang_opencl)
1152    Opts.OpenCLVersion = 100;
1153  else if (LangStd == LangStandard::lang_opencl11)
1154      Opts.OpenCLVersion = 110;
1155  else if (LangStd == LangStandard::lang_opencl12)
1156    Opts.OpenCLVersion = 120;
1157
1158  // OpenCL has some additional defaults.
1159  if (Opts.OpenCL) {
1160    Opts.AltiVec = 0;
1161    Opts.CXXOperatorNames = 1;
1162    Opts.LaxVectorConversions = 0;
1163    Opts.DefaultFPContract = 1;
1164    Opts.NativeHalfType = 1;
1165  }
1166
1167  Opts.CUDA = LangStd == LangStandard::lang_cuda || IK == IK_CUDA;
1168
1169  // OpenCL and C++ both have bool, true, false keywords.
1170  Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1171
1172  // OpenCL has half keyword
1173  Opts.Half = Opts.OpenCL;
1174
1175  // C++ has wchar_t keyword.
1176  Opts.WChar = Opts.CPlusPlus;
1177
1178  Opts.GNUKeywords = Opts.GNUMode;
1179  Opts.CXXOperatorNames = Opts.CPlusPlus;
1180
1181  // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1182  // is specified, or -std is set to a conforming mode.
1183  // Trigraphs are disabled by default in c++1z onwards.
1184  Opts.Trigraphs = !Opts.GNUMode && !Opts.CPlusPlus1z;
1185
1186  Opts.DollarIdents = !Opts.AsmPreprocessor;
1187
1188  // C++1y onwards has sized global deallocation functions.
1189  Opts.SizedDeallocation = Opts.CPlusPlus1y;
1190}
1191
1192/// Attempt to parse a visibility value out of the given argument.
1193static Visibility parseVisibility(Arg *arg, ArgList &args,
1194                                  DiagnosticsEngine &diags) {
1195  StringRef value = arg->getValue();
1196  if (value == "default") {
1197    return DefaultVisibility;
1198  } else if (value == "hidden") {
1199    return HiddenVisibility;
1200  } else if (value == "protected") {
1201    // FIXME: diagnose if target does not support protected visibility
1202    return ProtectedVisibility;
1203  }
1204
1205  diags.Report(diag::err_drv_invalid_value)
1206    << arg->getAsString(args) << value;
1207  return DefaultVisibility;
1208}
1209
1210static unsigned parseMSCVersion(ArgList &Args, DiagnosticsEngine &Diags) {
1211  auto Arg = Args.getLastArg(OPT_fmsc_version);
1212  if (!Arg)
1213    return 0;
1214
1215  // The MSC versioning scheme involves four versioning components:
1216  //  - Major
1217  //  - Minor
1218  //  - Build
1219  //  - Patch
1220  //
1221  // We accept either the old style (_MSC_VER) value, or a _MSC_FULL_VER value.
1222  // Additionally, the value may be provided in the form of a more readable
1223  // MM.mm.bbbbb.pp version.
1224  //
1225  // Unfortunately, due to the bit-width limitations, we cannot currently encode
1226  // the value for the patch level.
1227
1228  StringRef Value = Arg->getValue();
1229
1230  // parse the compatible old form of _MSC_VER or the newer _MSC_FULL_VER
1231  if (Value.find('.') == StringRef::npos) {
1232    unsigned Version = 0;
1233    if (Value.getAsInteger(10, Version)) {
1234      Diags.Report(diag::err_drv_invalid_value)
1235        << Arg->getAsString(Args) << Value;
1236      return 0;
1237    }
1238    if (Version < 100)
1239      Version = Version * 100;    // major -> major.minor
1240    if (Version < 100000)
1241      Version = Version * 100000; // major.minor -> major.minor.build
1242    return Version;
1243  }
1244
1245  // parse the dot-delimited component version
1246  unsigned VC[4] = {0};
1247  SmallVector<StringRef, 4> Components;
1248
1249  Value.split(Components, ".", llvm::array_lengthof(VC));
1250  for (unsigned CI = 0,
1251                CE = std::min(Components.size(), llvm::array_lengthof(VC));
1252       CI < CE; ++CI) {
1253    if (Components[CI].getAsInteger(10, VC[CI])) {
1254      Diags.Report(diag::err_drv_invalid_value)
1255        << Arg->getAsString(Args) << Value;
1256      return 0;
1257    }
1258  }
1259
1260  // FIXME we cannot encode the patch level
1261  return VC[0] * 10000000 + VC[1] * 100000 + VC[2];
1262}
1263
1264static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1265                          DiagnosticsEngine &Diags) {
1266  // FIXME: Cleanup per-file based stuff.
1267  LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1268  if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1269    LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1270#define LANGSTANDARD(id, name, desc, features) \
1271      .Case(name, LangStandard::lang_##id)
1272#include "clang/Frontend/LangStandards.def"
1273      .Default(LangStandard::lang_unspecified);
1274    if (LangStd == LangStandard::lang_unspecified)
1275      Diags.Report(diag::err_drv_invalid_value)
1276        << A->getAsString(Args) << A->getValue();
1277    else {
1278      // Valid standard, check to make sure language and standard are
1279      // compatible.
1280      const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1281      switch (IK) {
1282      case IK_C:
1283      case IK_ObjC:
1284      case IK_PreprocessedC:
1285      case IK_PreprocessedObjC:
1286        if (!(Std.isC89() || Std.isC99()))
1287          Diags.Report(diag::err_drv_argument_not_allowed_with)
1288            << A->getAsString(Args) << "C/ObjC";
1289        break;
1290      case IK_CXX:
1291      case IK_ObjCXX:
1292      case IK_PreprocessedCXX:
1293      case IK_PreprocessedObjCXX:
1294        if (!Std.isCPlusPlus())
1295          Diags.Report(diag::err_drv_argument_not_allowed_with)
1296            << A->getAsString(Args) << "C++/ObjC++";
1297        break;
1298      case IK_OpenCL:
1299        if (!Std.isC99())
1300          Diags.Report(diag::err_drv_argument_not_allowed_with)
1301            << A->getAsString(Args) << "OpenCL";
1302        break;
1303      case IK_CUDA:
1304        if (!Std.isCPlusPlus())
1305          Diags.Report(diag::err_drv_argument_not_allowed_with)
1306            << A->getAsString(Args) << "CUDA";
1307        break;
1308      default:
1309        break;
1310      }
1311    }
1312  }
1313
1314  // -cl-std only applies for OpenCL language standards.
1315  // Override the -std option in this case.
1316  if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1317    LangStandard::Kind OpenCLLangStd
1318    = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1319    .Case("CL", LangStandard::lang_opencl)
1320    .Case("CL1.1", LangStandard::lang_opencl11)
1321    .Case("CL1.2", LangStandard::lang_opencl12)
1322    .Default(LangStandard::lang_unspecified);
1323
1324    if (OpenCLLangStd == LangStandard::lang_unspecified) {
1325      Diags.Report(diag::err_drv_invalid_value)
1326      << A->getAsString(Args) << A->getValue();
1327    }
1328    else
1329      LangStd = OpenCLLangStd;
1330  }
1331
1332  CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1333
1334  // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1335  // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1336  // while a subset (the non-C++ GNU keywords) is provided by GCC's
1337  // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1338  // name, as it doesn't seem a useful distinction.
1339  Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1340                                  Opts.GNUKeywords);
1341
1342  if (Args.hasArg(OPT_fno_operator_names))
1343    Opts.CXXOperatorNames = 0;
1344
1345  if (Opts.ObjC1) {
1346    if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1347      StringRef value = arg->getValue();
1348      if (Opts.ObjCRuntime.tryParse(value))
1349        Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1350    }
1351
1352    if (Args.hasArg(OPT_fobjc_gc_only))
1353      Opts.setGC(LangOptions::GCOnly);
1354    else if (Args.hasArg(OPT_fobjc_gc))
1355      Opts.setGC(LangOptions::HybridGC);
1356    else if (Args.hasArg(OPT_fobjc_arc)) {
1357      Opts.ObjCAutoRefCount = 1;
1358      if (!Opts.ObjCRuntime.allowsARC())
1359        Diags.Report(diag::err_arc_unsupported_on_runtime);
1360
1361      // Only set ObjCARCWeak if ARC is enabled.
1362      if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1363        Opts.ObjCARCWeak = 1;
1364      else
1365        Opts.ObjCARCWeak = Opts.ObjCRuntime.allowsWeak();
1366    }
1367
1368    if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1369      Opts.ObjCInferRelatedResultType = 0;
1370
1371    if (Args.hasArg(OPT_fobjc_subscripting_legacy_runtime))
1372      Opts.ObjCSubscriptingLegacyRuntime =
1373        (Opts.ObjCRuntime.getKind() == ObjCRuntime::FragileMacOSX);
1374  }
1375
1376  if (Args.hasArg(OPT_fgnu89_inline))
1377    Opts.GNUInline = 1;
1378
1379  if (Args.hasArg(OPT_fapple_kext)) {
1380    if (!Opts.CPlusPlus)
1381      Diags.Report(diag::warn_c_kext);
1382    else
1383      Opts.AppleKext = 1;
1384  }
1385
1386  if (Args.hasArg(OPT_print_ivar_layout))
1387    Opts.ObjCGCBitmapPrint = 1;
1388  if (Args.hasArg(OPT_fno_constant_cfstrings))
1389    Opts.NoConstantCFStrings = 1;
1390
1391  if (Args.hasArg(OPT_faltivec))
1392    Opts.AltiVec = 1;
1393
1394  if (Args.hasArg(OPT_pthread))
1395    Opts.POSIXThreads = 1;
1396
1397  // The value-visibility mode defaults to "default".
1398  if (Arg *visOpt = Args.getLastArg(OPT_fvisibility)) {
1399    Opts.setValueVisibilityMode(parseVisibility(visOpt, Args, Diags));
1400  } else {
1401    Opts.setValueVisibilityMode(DefaultVisibility);
1402  }
1403
1404  // The type-visibility mode defaults to the value-visibility mode.
1405  if (Arg *typeVisOpt = Args.getLastArg(OPT_ftype_visibility)) {
1406    Opts.setTypeVisibilityMode(parseVisibility(typeVisOpt, Args, Diags));
1407  } else {
1408    Opts.setTypeVisibilityMode(Opts.getValueVisibilityMode());
1409  }
1410
1411  if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1412    Opts.InlineVisibilityHidden = 1;
1413
1414  if (Args.hasArg(OPT_ftrapv)) {
1415    Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1416    // Set the handler, if one is specified.
1417    Opts.OverflowHandler =
1418        Args.getLastArgValue(OPT_ftrapv_handler);
1419  }
1420  else if (Args.hasArg(OPT_fwrapv))
1421    Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1422
1423  if (Args.hasArg(OPT_trigraphs))
1424    Opts.Trigraphs = 1;
1425
1426  Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1427                                   OPT_fno_dollars_in_identifiers,
1428                                   Opts.DollarIdents);
1429  Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1430  Opts.MSVCCompat = Args.hasArg(OPT_fms_compatibility);
1431  Opts.MicrosoftExt = Opts.MSVCCompat || Args.hasArg(OPT_fms_extensions);
1432  Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
1433  Opts.MSCVersion = parseMSCVersion(Args, Diags);
1434  Opts.VtorDispMode = getLastArgIntValue(Args, OPT_vtordisp_mode_EQ, 1, Diags);
1435  Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1436  Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1437  Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
1438                                   Opts.ConstStrings);
1439  if (Args.hasArg(OPT_fno_lax_vector_conversions))
1440    Opts.LaxVectorConversions = 0;
1441  if (Args.hasArg(OPT_fno_threadsafe_statics))
1442    Opts.ThreadsafeStatics = 0;
1443  Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1444  Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
1445  Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
1446  Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1447  Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
1448
1449  Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1450  Opts.RTTIData = Opts.RTTI && !Args.hasArg(OPT_fno_rtti_data);
1451  Opts.Blocks = Args.hasArg(OPT_fblocks);
1452  Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
1453  Opts.Modules = Args.hasArg(OPT_fmodules);
1454  Opts.ModulesStrictDeclUse = Args.hasArg(OPT_fmodules_strict_decluse);
1455  Opts.ModulesDeclUse =
1456      Args.hasArg(OPT_fmodules_decluse) || Opts.ModulesStrictDeclUse;
1457  Opts.ModulesSearchAll = Opts.Modules &&
1458    !Args.hasArg(OPT_fno_modules_search_all) &&
1459    Args.hasArg(OPT_fmodules_search_all);
1460  Opts.ModulesErrorRecovery = !Args.hasArg(OPT_fno_modules_error_recovery);
1461  Opts.CharIsSigned = Opts.OpenCL || !Args.hasArg(OPT_fno_signed_char);
1462  Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
1463  Opts.ShortWChar = Args.hasFlag(OPT_fshort_wchar, OPT_fno_short_wchar, false);
1464  Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1465  Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1466  Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1467  Opts.NoMathBuiltin = Args.hasArg(OPT_fno_math_builtin);
1468  Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1469  Opts.SizedDeallocation |= Args.hasArg(OPT_fsized_deallocation);
1470  Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1471  Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1472  Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1473  Opts.MathErrno = !Opts.OpenCL && Args.hasArg(OPT_fmath_errno);
1474  Opts.InstantiationDepth =
1475      getLastArgIntValue(Args, OPT_ftemplate_depth, 256, Diags);
1476  Opts.ArrowDepth =
1477      getLastArgIntValue(Args, OPT_foperator_arrow_depth, 256, Diags);
1478  Opts.ConstexprCallDepth =
1479      getLastArgIntValue(Args, OPT_fconstexpr_depth, 512, Diags);
1480  Opts.ConstexprStepLimit =
1481      getLastArgIntValue(Args, OPT_fconstexpr_steps, 1048576, Diags);
1482  Opts.BracketDepth = getLastArgIntValue(Args, OPT_fbracket_depth, 256, Diags);
1483  Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
1484  Opts.NumLargeByValueCopy =
1485      getLastArgIntValue(Args, OPT_Wlarge_by_value_copy_EQ, 0, Diags);
1486  Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
1487  Opts.ObjCConstantStringClass =
1488    Args.getLastArgValue(OPT_fconstant_string_class);
1489  Opts.ObjCDefaultSynthProperties =
1490    !Args.hasArg(OPT_disable_objc_default_synthesize_properties);
1491  Opts.EncodeExtendedBlockSig =
1492    Args.hasArg(OPT_fencode_extended_block_signature);
1493  Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1494  Opts.PackStruct = getLastArgIntValue(Args, OPT_fpack_struct_EQ, 0, Diags);
1495  Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
1496  Opts.PIELevel = getLastArgIntValue(Args, OPT_pie_level, 0, Diags);
1497  Opts.Static = Args.hasArg(OPT_static_define);
1498  Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
1499  Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
1500                        || Args.hasArg(OPT_fdump_record_layouts);
1501  Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1502  Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1503  Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1504  Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
1505  Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
1506  Opts.MRTD = Args.hasArg(OPT_mrtd);
1507  Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
1508  Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
1509  Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
1510  Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
1511  Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
1512  Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
1513  Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
1514  Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
1515
1516  if (Arg *A = Args.getLastArg(OPT_faddress_space_map_mangling_EQ)) {
1517    switch (llvm::StringSwitch<unsigned>(A->getValue())
1518      .Case("target", LangOptions::ASMM_Target)
1519      .Case("no", LangOptions::ASMM_Off)
1520      .Case("yes", LangOptions::ASMM_On)
1521      .Default(255)) {
1522    default:
1523      Diags.Report(diag::err_drv_invalid_value)
1524        << "-faddress-space-map-mangling=" << A->getValue();
1525      break;
1526    case LangOptions::ASMM_Target:
1527      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Target);
1528      break;
1529    case LangOptions::ASMM_On:
1530      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_On);
1531      break;
1532    case LangOptions::ASMM_Off:
1533      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Off);
1534      break;
1535    }
1536  }
1537
1538  if (Arg *A = Args.getLastArg(OPT_fms_memptr_rep_EQ)) {
1539    LangOptions::PragmaMSPointersToMembersKind InheritanceModel =
1540        llvm::StringSwitch<LangOptions::PragmaMSPointersToMembersKind>(
1541            A->getValue())
1542            .Case("single",
1543                  LangOptions::PPTMK_FullGeneralitySingleInheritance)
1544            .Case("multiple",
1545                  LangOptions::PPTMK_FullGeneralityMultipleInheritance)
1546            .Case("virtual",
1547                  LangOptions::PPTMK_FullGeneralityVirtualInheritance)
1548            .Default(LangOptions::PPTMK_BestCase);
1549    if (InheritanceModel == LangOptions::PPTMK_BestCase)
1550      Diags.Report(diag::err_drv_invalid_value)
1551          << "-fms-memptr-rep=" << A->getValue();
1552
1553    Opts.setMSPointerToMemberRepresentationMethod(InheritanceModel);
1554  }
1555
1556  // Check if -fopenmp= is specified.
1557  if (const Arg *A = Args.getLastArg(options::OPT_fopenmp_EQ)) {
1558    Opts.OpenMP = llvm::StringSwitch<bool>(A->getValue())
1559        .Case("libiomp5", true)
1560        .Default(false);
1561  }
1562
1563  // Record whether the __DEPRECATED define was requested.
1564  Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
1565                                 OPT_fno_deprecated_macro,
1566                                 Opts.Deprecated);
1567
1568  // FIXME: Eliminate this dependency.
1569  unsigned Opt = getOptimizationLevel(Args, IK, Diags),
1570       OptSize = getOptimizationLevelSize(Args);
1571  Opts.Optimize = Opt != 0;
1572  Opts.OptimizeSize = OptSize != 0;
1573
1574  // This is the __NO_INLINE__ define, which just depends on things like the
1575  // optimization level and -fno-inline, not actually whether the backend has
1576  // inlining enabled.
1577  Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
1578
1579  Opts.FastMath = Args.hasArg(OPT_ffast_math);
1580  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only);
1581
1582  Opts.RetainCommentsFromSystemHeaders =
1583      Args.hasArg(OPT_fretain_comments_from_system_headers);
1584
1585  unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
1586  switch (SSP) {
1587  default:
1588    Diags.Report(diag::err_drv_invalid_value)
1589      << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1590    break;
1591  case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
1592  case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
1593  case 2: Opts.setStackProtector(LangOptions::SSPStrong); break;
1594  case 3: Opts.setStackProtector(LangOptions::SSPReq); break;
1595  }
1596
1597  // Parse -fsanitize= arguments.
1598  std::vector<std::string> Sanitizers = Args.getAllArgValues(OPT_fsanitize_EQ);
1599  for (unsigned I = 0, N = Sanitizers.size(); I != N; ++I) {
1600    // Since the Opts.Sanitize* values are bitfields, it's a little tricky to
1601    // efficiently map string values to them. Perform the mapping indirectly:
1602    // convert strings to enumerated values, then switch over the enum to set
1603    // the right bitfield value.
1604    enum Sanitizer {
1605#define SANITIZER(NAME, ID) \
1606      ID,
1607#include "clang/Basic/Sanitizers.def"
1608      Unknown
1609    };
1610    switch (llvm::StringSwitch<unsigned>(Sanitizers[I])
1611#define SANITIZER(NAME, ID) \
1612              .Case(NAME, ID)
1613#include "clang/Basic/Sanitizers.def"
1614              .Default(Unknown)) {
1615#define SANITIZER(NAME, ID) \
1616    case ID: \
1617      Opts.Sanitize.ID = true; \
1618      break;
1619#include "clang/Basic/Sanitizers.def"
1620
1621    case Unknown:
1622      Diags.Report(diag::err_drv_invalid_value)
1623        << "-fsanitize=" << Sanitizers[I];
1624      break;
1625    }
1626  }
1627}
1628
1629static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1630                                  FileManager &FileMgr,
1631                                  DiagnosticsEngine &Diags) {
1632  using namespace options;
1633  Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1634  Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1635  if (const Arg *A = Args.getLastArg(OPT_token_cache))
1636      Opts.TokenCache = A->getValue();
1637  else
1638    Opts.TokenCache = Opts.ImplicitPTHInclude;
1639  Opts.UsePredefines = !Args.hasArg(OPT_undef);
1640  Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1641  Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1642
1643  Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
1644  for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
1645         ie = Args.filtered_end(); it != ie; ++it) {
1646    const Arg *A = *it;
1647    Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
1648  }
1649
1650  if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1651    StringRef Value(A->getValue());
1652    size_t Comma = Value.find(',');
1653    unsigned Bytes = 0;
1654    unsigned EndOfLine = 0;
1655
1656    if (Comma == StringRef::npos ||
1657        Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1658        Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1659      Diags.Report(diag::err_drv_preamble_format);
1660    else {
1661      Opts.PrecompiledPreambleBytes.first = Bytes;
1662      Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1663    }
1664  }
1665
1666  // Add macros from the command line.
1667  for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1668         ie = Args.filtered_end(); it != ie; ++it) {
1669    if ((*it)->getOption().matches(OPT_D))
1670      Opts.addMacroDef((*it)->getValue());
1671    else
1672      Opts.addMacroUndef((*it)->getValue());
1673  }
1674
1675  Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1676
1677  // Add the ordered list of -includes.
1678  for (arg_iterator it = Args.filtered_begin(OPT_include),
1679         ie = Args.filtered_end(); it != ie; ++it) {
1680    const Arg *A = *it;
1681    Opts.Includes.push_back(A->getValue());
1682  }
1683
1684  for (arg_iterator it = Args.filtered_begin(OPT_chain_include),
1685         ie = Args.filtered_end(); it != ie; ++it) {
1686    const Arg *A = *it;
1687    Opts.ChainedIncludes.push_back(A->getValue());
1688  }
1689
1690  // Include 'altivec.h' if -faltivec option present
1691  if (Args.hasArg(OPT_faltivec))
1692    Opts.Includes.push_back("altivec.h");
1693
1694  for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1695         ie = Args.filtered_end(); it != ie; ++it) {
1696    const Arg *A = *it;
1697    std::pair<StringRef,StringRef> Split =
1698      StringRef(A->getValue()).split(';');
1699
1700    if (Split.second.empty()) {
1701      Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1702      continue;
1703    }
1704
1705    Opts.addRemappedFile(Split.first, Split.second);
1706  }
1707
1708  if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
1709    StringRef Name = A->getValue();
1710    unsigned Library = llvm::StringSwitch<unsigned>(Name)
1711      .Case("libc++", ARCXX_libcxx)
1712      .Case("libstdc++", ARCXX_libstdcxx)
1713      .Case("none", ARCXX_nolib)
1714      .Default(~0U);
1715    if (Library == ~0U)
1716      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1717    else
1718      Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
1719  }
1720}
1721
1722static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1723                                        ArgList &Args,
1724                                        frontend::ActionKind Action) {
1725  using namespace options;
1726
1727  switch (Action) {
1728  case frontend::ASTDeclList:
1729  case frontend::ASTDump:
1730  case frontend::ASTPrint:
1731  case frontend::ASTView:
1732  case frontend::EmitAssembly:
1733  case frontend::EmitBC:
1734  case frontend::EmitHTML:
1735  case frontend::EmitLLVM:
1736  case frontend::EmitLLVMOnly:
1737  case frontend::EmitCodeGenOnly:
1738  case frontend::EmitObj:
1739  case frontend::FixIt:
1740  case frontend::GenerateModule:
1741  case frontend::GeneratePCH:
1742  case frontend::GeneratePTH:
1743  case frontend::ParseSyntaxOnly:
1744  case frontend::ModuleFileInfo:
1745  case frontend::VerifyPCH:
1746  case frontend::PluginAction:
1747  case frontend::PrintDeclContext:
1748  case frontend::RewriteObjC:
1749  case frontend::RewriteTest:
1750  case frontend::RunAnalysis:
1751  case frontend::MigrateSource:
1752    Opts.ShowCPP = 0;
1753    break;
1754
1755  case frontend::DumpRawTokens:
1756  case frontend::DumpTokens:
1757  case frontend::InitOnly:
1758  case frontend::PrintPreamble:
1759  case frontend::PrintPreprocessedInput:
1760  case frontend::RewriteMacros:
1761  case frontend::RunPreprocessorOnly:
1762    Opts.ShowCPP = !Args.hasArg(OPT_dM);
1763    break;
1764  }
1765
1766  Opts.ShowComments = Args.hasArg(OPT_C);
1767  Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1768  Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1769  Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1770  Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
1771}
1772
1773static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1774  using namespace options;
1775  Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1776  Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1777  Opts.FPMath = Args.getLastArgValue(OPT_mfpmath);
1778  Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
1779  Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1780  Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1781
1782  // Use the default target triple if unspecified.
1783  if (Opts.Triple.empty())
1784    Opts.Triple = llvm::sys::getDefaultTargetTriple();
1785}
1786
1787bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1788                                        const char *const *ArgBegin,
1789                                        const char *const *ArgEnd,
1790                                        DiagnosticsEngine &Diags) {
1791  bool Success = true;
1792
1793  // Parse the arguments.
1794  std::unique_ptr<OptTable> Opts(createDriverOptTable());
1795  const unsigned IncludedFlagsBitmask = options::CC1Option;
1796  unsigned MissingArgIndex, MissingArgCount;
1797  std::unique_ptr<InputArgList> Args(
1798      Opts->ParseArgs(ArgBegin, ArgEnd, MissingArgIndex, MissingArgCount,
1799                      IncludedFlagsBitmask));
1800
1801  // Check for missing argument error.
1802  if (MissingArgCount) {
1803    Diags.Report(diag::err_drv_missing_argument)
1804      << Args->getArgString(MissingArgIndex) << MissingArgCount;
1805    Success = false;
1806  }
1807
1808  // Issue errors on unknown arguments.
1809  for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1810         ie = Args->filtered_end(); it != ie; ++it) {
1811    Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
1812    Success = false;
1813  }
1814
1815  Success = ParseAnalyzerArgs(*Res.getAnalyzerOpts(), *Args, Diags) && Success;
1816  Success = ParseMigratorArgs(Res.getMigratorOpts(), *Args) && Success;
1817  ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1818  Success = ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, &Diags)
1819            && Success;
1820  ParseCommentArgs(Res.getLangOpts()->CommentOpts, *Args);
1821  ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
1822  // FIXME: We shouldn't have to pass the DashX option around here
1823  InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1824  ParseTargetArgs(Res.getTargetOpts(), *Args);
1825  Success = ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags,
1826                             Res.getTargetOpts()) && Success;
1827  ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1828  if (DashX != IK_AST && DashX != IK_LLVM_IR) {
1829    ParseLangArgs(*Res.getLangOpts(), *Args, DashX, Diags);
1830    if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
1831      Res.getLangOpts()->ObjCExceptions = 1;
1832  }
1833  // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
1834  // PCH file and find the original header name. Remove the need to do that in
1835  // ParsePreprocessorArgs and remove the FileManager
1836  // parameters from the function and the "FileManager.h" #include.
1837  FileManager FileMgr(Res.getFileSystemOpts());
1838  ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
1839  ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args,
1840                              Res.getFrontendOpts().ProgramAction);
1841  return Success;
1842}
1843
1844namespace {
1845
1846  class ModuleSignature {
1847    SmallVector<uint64_t, 16> Data;
1848    unsigned CurBit;
1849    uint64_t CurValue;
1850
1851  public:
1852    ModuleSignature() : CurBit(0), CurValue(0) { }
1853
1854    void add(uint64_t Value, unsigned Bits);
1855    void add(StringRef Value);
1856    void flush();
1857
1858    llvm::APInt getAsInteger() const;
1859  };
1860}
1861
1862void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
1863  CurValue |= Value << CurBit;
1864  if (CurBit + NumBits < 64) {
1865    CurBit += NumBits;
1866    return;
1867  }
1868
1869  // Add the current word.
1870  Data.push_back(CurValue);
1871
1872  if (CurBit)
1873    CurValue = Value >> (64-CurBit);
1874  else
1875    CurValue = 0;
1876  CurBit = (CurBit+NumBits) & 63;
1877}
1878
1879void ModuleSignature::flush() {
1880  if (CurBit == 0)
1881    return;
1882
1883  Data.push_back(CurValue);
1884  CurBit = 0;
1885  CurValue = 0;
1886}
1887
1888void ModuleSignature::add(StringRef Value) {
1889  for (StringRef::iterator I = Value.begin(), IEnd = Value.end(); I != IEnd;++I)
1890    add(*I, 8);
1891}
1892
1893llvm::APInt ModuleSignature::getAsInteger() const {
1894  return llvm::APInt(Data.size() * 64, Data);
1895}
1896
1897std::string CompilerInvocation::getModuleHash() const {
1898  // Note: For QoI reasons, the things we use as a hash here should all be
1899  // dumped via the -module-info flag.
1900  using llvm::hash_code;
1901  using llvm::hash_value;
1902  using llvm::hash_combine;
1903
1904  // Start the signature with the compiler version.
1905  // FIXME: We'd rather use something more cryptographically sound than
1906  // CityHash, but this will do for now.
1907  hash_code code = hash_value(getClangFullRepositoryVersion());
1908
1909  // Extend the signature with the language options
1910#define LANGOPT(Name, Bits, Default, Description) \
1911   code = hash_combine(code, LangOpts->Name);
1912#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
1913  code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
1914#define BENIGN_LANGOPT(Name, Bits, Default, Description)
1915#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
1916#include "clang/Basic/LangOptions.def"
1917
1918  // Extend the signature with the target options.
1919  code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
1920                      TargetOpts->ABI);
1921  for (unsigned i = 0, n = TargetOpts->FeaturesAsWritten.size(); i != n; ++i)
1922    code = hash_combine(code, TargetOpts->FeaturesAsWritten[i]);
1923
1924  // Extend the signature with preprocessor options.
1925  const PreprocessorOptions &ppOpts = getPreprocessorOpts();
1926  const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
1927  code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
1928
1929  for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
1930            I = getPreprocessorOpts().Macros.begin(),
1931         IEnd = getPreprocessorOpts().Macros.end();
1932       I != IEnd; ++I) {
1933    // If we're supposed to ignore this macro for the purposes of modules,
1934    // don't put it into the hash.
1935    if (!hsOpts.ModulesIgnoreMacros.empty()) {
1936      // Check whether we're ignoring this macro.
1937      StringRef MacroDef = I->first;
1938      if (hsOpts.ModulesIgnoreMacros.count(MacroDef.split('=').first))
1939        continue;
1940    }
1941
1942    code = hash_combine(code, I->first, I->second);
1943  }
1944
1945  // Extend the signature with the sysroot.
1946  code = hash_combine(code, hsOpts.Sysroot, hsOpts.UseBuiltinIncludes,
1947                      hsOpts.UseStandardSystemIncludes,
1948                      hsOpts.UseStandardCXXIncludes,
1949                      hsOpts.UseLibcxx);
1950  code = hash_combine(code, hsOpts.ResourceDir);
1951
1952  // Extend the signature with the user build path.
1953  code = hash_combine(code, hsOpts.ModuleUserBuildPath);
1954
1955  // Darwin-specific hack: if we have a sysroot, use the contents and
1956  // modification time of
1957  //   $sysroot/System/Library/CoreServices/SystemVersion.plist
1958  // as part of the module hash.
1959  if (!hsOpts.Sysroot.empty()) {
1960    SmallString<128> systemVersionFile;
1961    systemVersionFile += hsOpts.Sysroot;
1962    llvm::sys::path::append(systemVersionFile, "System");
1963    llvm::sys::path::append(systemVersionFile, "Library");
1964    llvm::sys::path::append(systemVersionFile, "CoreServices");
1965    llvm::sys::path::append(systemVersionFile, "SystemVersion.plist");
1966
1967    llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> buffer =
1968        llvm::MemoryBuffer::getFile(systemVersionFile.str());
1969    if (buffer) {
1970      code = hash_combine(code, buffer.get()->getBuffer());
1971
1972      struct stat statBuf;
1973      if (stat(systemVersionFile.c_str(), &statBuf) == 0)
1974        code = hash_combine(code, statBuf.st_mtime);
1975    }
1976  }
1977
1978  return llvm::APInt(64, code).toString(36, /*Signed=*/false);
1979}
1980
1981namespace clang {
1982
1983template<typename IntTy>
1984static IntTy getLastArgIntValueImpl(const ArgList &Args, OptSpecifier Id,
1985                                    IntTy Default,
1986                                    DiagnosticsEngine *Diags) {
1987  IntTy Res = Default;
1988  if (Arg *A = Args.getLastArg(Id)) {
1989    if (StringRef(A->getValue()).getAsInteger(10, Res)) {
1990      if (Diags)
1991        Diags->Report(diag::err_drv_invalid_int_value) << A->getAsString(Args)
1992                                                       << A->getValue();
1993    }
1994  }
1995  return Res;
1996}
1997
1998
1999// Declared in clang/Frontend/Utils.h.
2000int getLastArgIntValue(const ArgList &Args, OptSpecifier Id, int Default,
2001                       DiagnosticsEngine *Diags) {
2002  return getLastArgIntValueImpl<int>(Args, Id, Default, Diags);
2003}
2004
2005uint64_t getLastArgUInt64Value(const ArgList &Args, OptSpecifier Id,
2006                               uint64_t Default,
2007                               DiagnosticsEngine *Diags) {
2008  return getLastArgIntValueImpl<uint64_t>(Args, Id, Default, Diags);
2009}
2010
2011void BuryPointer(const void *Ptr) {
2012  // This function may be called only a small fixed amount of times per each
2013  // invocation, otherwise we do actually have a leak which we want to report.
2014  // If this function is called more than kGraveYardMaxSize times, the pointers
2015  // will not be properly buried and a leak detector will report a leak, which
2016  // is what we want in such case.
2017  static const size_t kGraveYardMaxSize = 16;
2018  LLVM_ATTRIBUTE_UNUSED static const void *GraveYard[kGraveYardMaxSize];
2019  static std::atomic<unsigned> GraveYardSize;
2020  unsigned Idx = GraveYardSize++;
2021  if (Idx >= kGraveYardMaxSize)
2022    return;
2023  GraveYard[Idx] = Ptr;
2024}
2025
2026IntrusiveRefCntPtr<vfs::FileSystem>
2027createVFSFromCompilerInvocation(const CompilerInvocation &CI,
2028                                DiagnosticsEngine &Diags) {
2029  if (CI.getHeaderSearchOpts().VFSOverlayFiles.empty())
2030    return vfs::getRealFileSystem();
2031
2032  IntrusiveRefCntPtr<vfs::OverlayFileSystem>
2033    Overlay(new vfs::OverlayFileSystem(vfs::getRealFileSystem()));
2034  // earlier vfs files are on the bottom
2035  for (const std::string &File : CI.getHeaderSearchOpts().VFSOverlayFiles) {
2036    llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Buffer =
2037        llvm::MemoryBuffer::getFile(File);
2038    if (!Buffer) {
2039      Diags.Report(diag::err_missing_vfs_overlay_file) << File;
2040      return IntrusiveRefCntPtr<vfs::FileSystem>();
2041    }
2042
2043    IntrusiveRefCntPtr<vfs::FileSystem> FS =
2044        vfs::getVFSFromYAML(Buffer->release(), /*DiagHandler*/ nullptr);
2045    if (!FS.get()) {
2046      Diags.Report(diag::err_invalid_vfs_overlay) << File;
2047      return IntrusiveRefCntPtr<vfs::FileSystem>();
2048    }
2049    Overlay->pushOverlay(FS);
2050  }
2051  return Overlay;
2052}
2053} // end namespace clang
2054