CompilerInvocation.cpp revision 243830 
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/Diagnostic.h"
12#include "clang/Basic/Version.h"
13#include "clang/Basic/FileManager.h"
14#include "clang/Lex/HeaderSearchOptions.h"
15#include "clang/Driver/Arg.h"
16#include "clang/Driver/ArgList.h"
17#include "clang/Driver/Options.h"
18#include "clang/Driver/DriverDiagnostic.h"
19#include "clang/Driver/OptTable.h"
20#include "clang/Driver/Option.h"
21#include "clang/Frontend/CompilerInvocation.h"
22#include "clang/Frontend/LangStandard.h"
23#include "clang/Serialization/ASTReader.h"
24#include "llvm/ADT/Hashing.h"
25#include "llvm/ADT/OwningPtr.h"
26#include "llvm/ADT/SmallVector.h"
27#include "llvm/ADT/StringExtras.h"
28#include "llvm/ADT/StringSwitch.h"
29#include "llvm/ADT/Triple.h"
30#include "llvm/Support/ErrorHandling.h"
31#include "llvm/Support/Host.h"
32#include "llvm/Support/Path.h"
33using namespace clang;
34
35//===----------------------------------------------------------------------===//
36// Initialization.
37//===----------------------------------------------------------------------===//
38
39CompilerInvocationBase::CompilerInvocationBase()
40  : LangOpts(new LangOptions()), TargetOpts(new TargetOptions()),
41    DiagnosticOpts(new DiagnosticOptions()),
42    HeaderSearchOpts(new HeaderSearchOptions()),
43    PreprocessorOpts(new PreprocessorOptions()) {}
44
45CompilerInvocationBase::CompilerInvocationBase(const CompilerInvocationBase &X)
46  : RefCountedBase<CompilerInvocation>(),
47    LangOpts(new LangOptions(*X.getLangOpts())),
48    TargetOpts(new TargetOptions(X.getTargetOpts())),
49    DiagnosticOpts(new DiagnosticOptions(X.getDiagnosticOpts())),
50    HeaderSearchOpts(new HeaderSearchOptions(X.getHeaderSearchOpts())),
51    PreprocessorOpts(new PreprocessorOptions(X.getPreprocessorOpts())) {}
52
53//===----------------------------------------------------------------------===//
54// Deserialization (from args)
55//===----------------------------------------------------------------------===//
56
57using namespace clang::driver;
58using namespace clang::driver::options;
59
60//
61
62static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
63                                     DiagnosticsEngine &Diags) {
64  unsigned DefaultOpt = 0;
65  if (IK == IK_OpenCL && !Args.hasArg(OPT_cl_opt_disable))
66    DefaultOpt = 2;
67
68  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
69    if (A->getOption().matches(options::OPT_O0))
70      return 0;
71
72    assert (A->getOption().matches(options::OPT_O));
73
74    llvm::StringRef S(A->getValue());
75    if (S == "s" || S == "z" || S.empty())
76      return 2;
77
78    return Args.getLastArgIntValue(OPT_O, DefaultOpt, Diags);
79  }
80
81  return DefaultOpt;
82}
83
84static unsigned getOptimizationLevelSize(ArgList &Args, InputKind IK,
85                                         DiagnosticsEngine &Diags) {
86  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
87    if (A->getOption().matches(options::OPT_O)) {
88      switch (A->getValue()[0]) {
89      default:
90        return 0;
91      case 's':
92        return 1;
93      case 'z':
94        return 2;
95      }
96    }
97  }
98  return 0;
99}
100
101static void addWarningArgs(ArgList &Args, std::vector<std::string> &Warnings) {
102  for (arg_iterator I = Args.filtered_begin(OPT_W_Group),
103         E = Args.filtered_end(); I != E; ++I) {
104    Arg *A = *I;
105    // If the argument is a pure flag, add its name (minus the "W" at the beginning)
106    // to the warning list. Else, add its value (for the OPT_W case).
107    if (A->getOption().getKind() == Option::FlagClass) {
108      Warnings.push_back(A->getOption().getName().substr(1));
109    } else {
110      for (unsigned Idx = 0, End = A->getNumValues();
111           Idx < End; ++Idx) {
112        StringRef V = A->getValue(Idx);
113        // "-Wl," and such are not warning options.
114        // FIXME: Should be handled by putting these in separate flags.
115        if (V.startswith("l,") || V.startswith("a,") || V.startswith("p,"))
116          continue;
117
118        Warnings.push_back(V);
119      }
120    }
121  }
122}
123
124static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
125                              DiagnosticsEngine &Diags) {
126  using namespace options;
127  bool Success = true;
128  if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
129    StringRef Name = A->getValue();
130    AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
131#define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
132      .Case(CMDFLAG, NAME##Model)
133#include "clang/StaticAnalyzer/Core/Analyses.def"
134      .Default(NumStores);
135    if (Value == NumStores) {
136      Diags.Report(diag::err_drv_invalid_value)
137        << A->getAsString(Args) << Name;
138      Success = false;
139    } else {
140      Opts.AnalysisStoreOpt = Value;
141    }
142  }
143
144  if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
145    StringRef Name = A->getValue();
146    AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
147#define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
148      .Case(CMDFLAG, NAME##Model)
149#include "clang/StaticAnalyzer/Core/Analyses.def"
150      .Default(NumConstraints);
151    if (Value == NumConstraints) {
152      Diags.Report(diag::err_drv_invalid_value)
153        << A->getAsString(Args) << Name;
154      Success = false;
155    } else {
156      Opts.AnalysisConstraintsOpt = Value;
157    }
158  }
159
160  if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
161    StringRef Name = A->getValue();
162    AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
163#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
164      .Case(CMDFLAG, PD_##NAME)
165#include "clang/StaticAnalyzer/Core/Analyses.def"
166      .Default(NUM_ANALYSIS_DIAG_CLIENTS);
167    if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
168      Diags.Report(diag::err_drv_invalid_value)
169        << A->getAsString(Args) << Name;
170      Success = false;
171    } else {
172      Opts.AnalysisDiagOpt = Value;
173    }
174  }
175
176  if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
177    StringRef Name = A->getValue();
178    AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
179#define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
180      .Case(CMDFLAG, NAME)
181#include "clang/StaticAnalyzer/Core/Analyses.def"
182      .Default(NumPurgeModes);
183    if (Value == NumPurgeModes) {
184      Diags.Report(diag::err_drv_invalid_value)
185        << A->getAsString(Args) << Name;
186      Success = false;
187    } else {
188      Opts.AnalysisPurgeOpt = Value;
189    }
190  }
191
192  if (Arg *A = Args.getLastArg(OPT_analyzer_ipa)) {
193    StringRef Name = A->getValue();
194    AnalysisIPAMode Value = llvm::StringSwitch<AnalysisIPAMode>(Name)
195#define ANALYSIS_IPA(NAME, CMDFLAG, DESC) \
196      .Case(CMDFLAG, NAME)
197#include "clang/StaticAnalyzer/Core/Analyses.def"
198      .Default(NumIPAModes);
199    if (Value == NumIPAModes) {
200      Diags.Report(diag::err_drv_invalid_value)
201        << A->getAsString(Args) << Name;
202      Success = false;
203    } else {
204      Opts.IPAMode = Value;
205    }
206  }
207
208  if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
209    StringRef Name = A->getValue();
210    AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
211#define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
212      .Case(CMDFLAG, NAME)
213#include "clang/StaticAnalyzer/Core/Analyses.def"
214      .Default(NumInliningModes);
215    if (Value == NumInliningModes) {
216      Diags.Report(diag::err_drv_invalid_value)
217        << A->getAsString(Args) << Name;
218      Success = false;
219    } else {
220      Opts.InliningMode = Value;
221    }
222  }
223
224  Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
225  Opts.visualizeExplodedGraphWithGraphViz =
226    Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
227  Opts.visualizeExplodedGraphWithUbiGraph =
228    Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
229  Opts.NoRetryExhausted = Args.hasArg(OPT_analyzer_disable_retry_exhausted);
230  Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
231  Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
232  Opts.AnalyzeNestedBlocks =
233    Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
234  Opts.eagerlyAssumeBinOpBifurcation = Args.hasArg(OPT_analyzer_eagerly_assume);
235  Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
236  Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
237  Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
238  Opts.MaxNodes = Args.getLastArgIntValue(OPT_analyzer_max_nodes, 150000,Diags);
239  Opts.maxBlockVisitOnPath = Args.getLastArgIntValue(OPT_analyzer_max_loop, 4, Diags);
240  Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
241  Opts.InlineMaxStackDepth =
242    Args.getLastArgIntValue(OPT_analyzer_inline_max_stack_depth,
243                            Opts.InlineMaxStackDepth, Diags);
244  Opts.InlineMaxFunctionSize =
245    Args.getLastArgIntValue(OPT_analyzer_inline_max_function_size,
246                            Opts.InlineMaxFunctionSize, Diags);
247
248  Opts.CheckersControlList.clear();
249  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_checker,
250                                             OPT_analyzer_disable_checker),
251         ie = Args.filtered_end(); it != ie; ++it) {
252    const Arg *A = *it;
253    A->claim();
254    bool enable = (A->getOption().getID() == OPT_analyzer_checker);
255    // We can have a list of comma separated checker names, e.g:
256    // '-analyzer-checker=cocoa,unix'
257    StringRef checkerList = A->getValue();
258    SmallVector<StringRef, 4> checkers;
259    checkerList.split(checkers, ",");
260    for (unsigned i = 0, e = checkers.size(); i != e; ++i)
261      Opts.CheckersControlList.push_back(std::make_pair(checkers[i], enable));
262  }
263
264  // Go through the analyzer configuration options.
265  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_config),
266       ie = Args.filtered_end(); it != ie; ++it) {
267    const Arg *A = *it;
268    A->claim();
269    // We can have a list of comma separated config names, e.g:
270    // '-analyzer-config key1=val1,key2=val2'
271    StringRef configList = A->getValue();
272    SmallVector<StringRef, 4> configVals;
273    configList.split(configVals, ",");
274    for (unsigned i = 0, e = configVals.size(); i != e; ++i) {
275      StringRef key, val;
276      llvm::tie(key, val) = configVals[i].split("=");
277      if (val.empty()) {
278        Diags.Report(SourceLocation(),
279                     diag::err_analyzer_config_no_value) << configVals[i];
280        Success = false;
281        break;
282      }
283      if (val.find('=') != StringRef::npos) {
284        Diags.Report(SourceLocation(),
285                     diag::err_analyzer_config_multiple_values)
286          << configVals[i];
287        Success = false;
288        break;
289      }
290      Opts.Config[key] = val;
291    }
292  }
293
294  return Success;
295}
296
297static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
298  Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
299  Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
300  return true;
301}
302
303static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
304                             DiagnosticsEngine &Diags) {
305  using namespace options;
306  bool Success = true;
307
308  unsigned OptLevel = getOptimizationLevel(Args, IK, Diags);
309  if (OptLevel > 3) {
310    Diags.Report(diag::err_drv_invalid_value)
311      << Args.getLastArg(OPT_O)->getAsString(Args) << OptLevel;
312    OptLevel = 3;
313    Success = false;
314  }
315  Opts.OptimizationLevel = OptLevel;
316
317  // We must always run at least the always inlining pass.
318  Opts.setInlining(
319    (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
320                                 : CodeGenOptions::OnlyAlwaysInlining);
321  // -fno-inline-functions overrides OptimizationLevel > 1.
322  Opts.NoInline = Args.hasArg(OPT_fno_inline);
323  Opts.setInlining(Args.hasArg(OPT_fno_inline_functions) ?
324                     CodeGenOptions::OnlyAlwaysInlining : Opts.getInlining());
325
326  if (Args.hasArg(OPT_gline_tables_only)) {
327    Opts.setDebugInfo(CodeGenOptions::DebugLineTablesOnly);
328  } else if (Args.hasArg(OPT_g_Flag)) {
329    if (Args.hasFlag(OPT_flimit_debug_info, OPT_fno_limit_debug_info, true))
330      Opts.setDebugInfo(CodeGenOptions::LimitedDebugInfo);
331    else
332      Opts.setDebugInfo(CodeGenOptions::FullDebugInfo);
333  }
334  Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
335
336  Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
337  Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
338  Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
339  Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
340    OPT_fuse_register_sized_bitfield_access);
341  Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
342  Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
343  Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
344  Opts.NoCommon = Args.hasArg(OPT_fno_common);
345  Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
346  Opts.OptimizeSize = getOptimizationLevelSize(Args, IK, Diags);
347  Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
348                            Args.hasArg(OPT_ffreestanding));
349  Opts.UnrollLoops = Args.hasArg(OPT_funroll_loops) ||
350                     (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
351
352  Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
353  Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
354  Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);
355  Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
356  Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
357  Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
358  Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
359  Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
360  Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
361  Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
362  Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
363  Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
364  Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
365  Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
366                       Args.hasArg(OPT_cl_finite_math_only)||
367                       Args.hasArg(OPT_cl_fast_relaxed_math));
368  Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
369                       Args.hasArg(OPT_cl_finite_math_only)||
370                       Args.hasArg(OPT_cl_fast_relaxed_math));
371  Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
372  Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
373  Opts.NumRegisterParameters = Args.getLastArgIntValue(OPT_mregparm, 0, Diags);
374  Opts.NoGlobalMerge = Args.hasArg(OPT_mno_global_merge);
375  Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
376  Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
377  Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
378  Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
379  Opts.NoDwarf2CFIAsm = Args.hasArg(OPT_fno_dwarf2_cfi_asm);
380  Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
381  Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
382  Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
383  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
384                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
385                      Args.hasArg(OPT_cl_fast_relaxed_math);
386  Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
387  Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
388  Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
389  Opts.BoundsChecking = Args.getLastArgIntValue(OPT_fbounds_checking_EQ, 0,
390                                                Diags);
391  Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
392
393  Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
394  Opts.DataSections = Args.hasArg(OPT_fdata_sections);
395
396  Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
397  Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
398
399  Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
400  Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
401  Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
402  Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
403  Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
404  Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
405  Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
406  Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
407  Opts.SSPBufferSize =
408    Args.getLastArgIntValue(OPT_stack_protector_buffer_size, 8, Diags);
409  Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
410  if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
411    StringRef Val = A->getValue();
412    unsigned StackAlignment = Opts.StackAlignment;
413    Val.getAsInteger(10, StackAlignment);
414    Opts.StackAlignment = StackAlignment;
415  }
416
417  if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
418    StringRef Name = A->getValue();
419    unsigned Method = llvm::StringSwitch<unsigned>(Name)
420      .Case("legacy", CodeGenOptions::Legacy)
421      .Case("non-legacy", CodeGenOptions::NonLegacy)
422      .Case("mixed", CodeGenOptions::Mixed)
423      .Default(~0U);
424    if (Method == ~0U) {
425      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
426      Success = false;
427    } else {
428      Opts.setObjCDispatchMethod(
429        static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
430    }
431  }
432
433  if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
434    StringRef Name = A->getValue();
435    unsigned Model = llvm::StringSwitch<unsigned>(Name)
436        .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
437        .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
438        .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
439        .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
440        .Default(~0U);
441    if (Model == ~0U) {
442      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
443      Success = false;
444    } else {
445      Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
446    }
447  }
448
449  return Success;
450}
451
452static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
453                                      ArgList &Args) {
454  using namespace options;
455  Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
456  Opts.Targets = Args.getAllArgValues(OPT_MT);
457  Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
458  Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
459  Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
460  Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
461  Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
462  Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
463}
464
465bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
466                                DiagnosticsEngine *Diags) {
467  using namespace options;
468  bool Success = true;
469
470  Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
471  Opts.DiagnosticSerializationFile =
472    Args.getLastArgValue(OPT_diagnostic_serialized_file);
473  Opts.IgnoreWarnings = Args.hasArg(OPT_w);
474  Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
475  Opts.Pedantic = Args.hasArg(OPT_pedantic);
476  Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
477  Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
478  Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
479  Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
480                                 OPT_fno_show_column,
481                                 /*Default=*/true);
482  Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
483  Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
484  Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
485
486  // Default behavior is to not to show note include stacks.
487  Opts.ShowNoteIncludeStack = false;
488  if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
489                               OPT_fno_diagnostics_show_note_include_stack))
490    if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
491      Opts.ShowNoteIncludeStack = true;
492
493  StringRef ShowOverloads =
494    Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
495  if (ShowOverloads == "best")
496    Opts.setShowOverloads(Ovl_Best);
497  else if (ShowOverloads == "all")
498    Opts.setShowOverloads(Ovl_All);
499  else {
500    Success = false;
501    if (Diags)
502      Diags->Report(diag::err_drv_invalid_value)
503      << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
504      << ShowOverloads;
505  }
506
507  StringRef ShowCategory =
508    Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
509  if (ShowCategory == "none")
510    Opts.ShowCategories = 0;
511  else if (ShowCategory == "id")
512    Opts.ShowCategories = 1;
513  else if (ShowCategory == "name")
514    Opts.ShowCategories = 2;
515  else {
516    Success = false;
517    if (Diags)
518      Diags->Report(diag::err_drv_invalid_value)
519      << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
520      << ShowCategory;
521  }
522
523  StringRef Format =
524    Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
525  if (Format == "clang")
526    Opts.setFormat(DiagnosticOptions::Clang);
527  else if (Format == "msvc")
528    Opts.setFormat(DiagnosticOptions::Msvc);
529  else if (Format == "vi")
530    Opts.setFormat(DiagnosticOptions::Vi);
531  else {
532    Success = false;
533    if (Diags)
534      Diags->Report(diag::err_drv_invalid_value)
535      << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
536      << Format;
537  }
538
539  Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
540  Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
541  Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
542  Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
543  Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
544  Opts.ErrorLimit = Args.getLastArgIntValue(OPT_ferror_limit, 0, Diags);
545  Opts.MacroBacktraceLimit
546    = Args.getLastArgIntValue(OPT_fmacro_backtrace_limit,
547                         DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
548  Opts.TemplateBacktraceLimit
549    = Args.getLastArgIntValue(OPT_ftemplate_backtrace_limit,
550                         DiagnosticOptions::DefaultTemplateBacktraceLimit,
551                         Diags);
552  Opts.ConstexprBacktraceLimit
553    = Args.getLastArgIntValue(OPT_fconstexpr_backtrace_limit,
554                         DiagnosticOptions::DefaultConstexprBacktraceLimit,
555                         Diags);
556  Opts.TabStop = Args.getLastArgIntValue(OPT_ftabstop,
557                                    DiagnosticOptions::DefaultTabStop, Diags);
558  if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
559    Opts.TabStop = DiagnosticOptions::DefaultTabStop;
560    if (Diags)
561      Diags->Report(diag::warn_ignoring_ftabstop_value)
562      << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
563  }
564  Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
565  Opts.DumpBuildInformation = Args.getLastArgValue(OPT_dump_build_information);
566  addWarningArgs(Args, Opts.Warnings);
567
568  return Success;
569}
570
571static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
572  Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
573}
574
575static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
576                                   DiagnosticsEngine &Diags) {
577  using namespace options;
578  Opts.ProgramAction = frontend::ParseSyntaxOnly;
579  if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
580    switch (A->getOption().getID()) {
581    default:
582      llvm_unreachable("Invalid option in group!");
583    case OPT_ast_list:
584      Opts.ProgramAction = frontend::ASTDeclList; break;
585    case OPT_ast_dump:
586      Opts.ProgramAction = frontend::ASTDump; break;
587    case OPT_ast_dump_xml:
588      Opts.ProgramAction = frontend::ASTDumpXML; break;
589    case OPT_ast_print:
590      Opts.ProgramAction = frontend::ASTPrint; break;
591    case OPT_ast_view:
592      Opts.ProgramAction = frontend::ASTView; break;
593    case OPT_dump_raw_tokens:
594      Opts.ProgramAction = frontend::DumpRawTokens; break;
595    case OPT_dump_tokens:
596      Opts.ProgramAction = frontend::DumpTokens; break;
597    case OPT_S:
598      Opts.ProgramAction = frontend::EmitAssembly; break;
599    case OPT_emit_llvm_bc:
600      Opts.ProgramAction = frontend::EmitBC; break;
601    case OPT_emit_html:
602      Opts.ProgramAction = frontend::EmitHTML; break;
603    case OPT_emit_llvm:
604      Opts.ProgramAction = frontend::EmitLLVM; break;
605    case OPT_emit_llvm_only:
606      Opts.ProgramAction = frontend::EmitLLVMOnly; break;
607    case OPT_emit_codegen_only:
608      Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
609    case OPT_emit_obj:
610      Opts.ProgramAction = frontend::EmitObj; break;
611    case OPT_fixit_EQ:
612      Opts.FixItSuffix = A->getValue();
613      // fall-through!
614    case OPT_fixit:
615      Opts.ProgramAction = frontend::FixIt; break;
616    case OPT_emit_module:
617      Opts.ProgramAction = frontend::GenerateModule; break;
618    case OPT_emit_pch:
619      Opts.ProgramAction = frontend::GeneratePCH; break;
620    case OPT_emit_pth:
621      Opts.ProgramAction = frontend::GeneratePTH; break;
622    case OPT_init_only:
623      Opts.ProgramAction = frontend::InitOnly; break;
624    case OPT_fsyntax_only:
625      Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
626    case OPT_print_decl_contexts:
627      Opts.ProgramAction = frontend::PrintDeclContext; break;
628    case OPT_print_preamble:
629      Opts.ProgramAction = frontend::PrintPreamble; break;
630    case OPT_E:
631      Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
632    case OPT_rewrite_macros:
633      Opts.ProgramAction = frontend::RewriteMacros; break;
634    case OPT_rewrite_objc:
635      Opts.ProgramAction = frontend::RewriteObjC; break;
636    case OPT_rewrite_test:
637      Opts.ProgramAction = frontend::RewriteTest; break;
638    case OPT_analyze:
639      Opts.ProgramAction = frontend::RunAnalysis; break;
640    case OPT_migrate:
641      Opts.ProgramAction = frontend::MigrateSource; break;
642    case OPT_Eonly:
643      Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
644    }
645  }
646
647  if (const Arg* A = Args.getLastArg(OPT_plugin)) {
648    Opts.Plugins.push_back(A->getValue(0));
649    Opts.ProgramAction = frontend::PluginAction;
650    Opts.ActionName = A->getValue();
651
652    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
653           end = Args.filtered_end(); it != end; ++it) {
654      if ((*it)->getValue(0) == Opts.ActionName)
655        Opts.PluginArgs.push_back((*it)->getValue(1));
656    }
657  }
658
659  Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
660  Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
661  for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
662    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
663           end = Args.filtered_end(); it != end; ++it) {
664      if ((*it)->getValue(0) == Opts.AddPluginActions[i])
665        Opts.AddPluginArgs[i].push_back((*it)->getValue(1));
666    }
667  }
668
669  if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
670    Opts.CodeCompletionAt =
671      ParsedSourceLocation::FromString(A->getValue());
672    if (Opts.CodeCompletionAt.FileName.empty())
673      Diags.Report(diag::err_drv_invalid_value)
674        << A->getAsString(Args) << A->getValue();
675  }
676  Opts.DisableFree = Args.hasArg(OPT_disable_free);
677
678  Opts.OutputFile = Args.getLastArgValue(OPT_o);
679  Opts.Plugins = Args.getAllArgValues(OPT_load);
680  Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
681  Opts.ShowHelp = Args.hasArg(OPT_help);
682  Opts.ShowStats = Args.hasArg(OPT_print_stats);
683  Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
684  Opts.ShowVersion = Args.hasArg(OPT_version);
685  Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
686  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
687  Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
688  Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
689  Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
690  Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
691  Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
692
693  Opts.CodeCompleteOpts.IncludeMacros
694    = Args.hasArg(OPT_code_completion_macros);
695  Opts.CodeCompleteOpts.IncludeCodePatterns
696    = Args.hasArg(OPT_code_completion_patterns);
697  Opts.CodeCompleteOpts.IncludeGlobals
698    = !Args.hasArg(OPT_no_code_completion_globals);
699  Opts.CodeCompleteOpts.IncludeBriefComments
700    = Args.hasArg(OPT_code_completion_brief_comments);
701
702  Opts.OverrideRecordLayoutsFile
703    = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
704  if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
705                                     OPT_arcmt_modify,
706                                     OPT_arcmt_migrate)) {
707    switch (A->getOption().getID()) {
708    default:
709      llvm_unreachable("missed a case");
710    case OPT_arcmt_check:
711      Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
712      break;
713    case OPT_arcmt_modify:
714      Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
715      break;
716    case OPT_arcmt_migrate:
717      Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
718      break;
719    }
720  }
721  Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
722  Opts.ARCMTMigrateReportOut
723    = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
724  Opts.ARCMTMigrateEmitARCErrors
725    = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
726
727  if (Args.hasArg(OPT_objcmt_migrate_literals))
728    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
729  if (Args.hasArg(OPT_objcmt_migrate_subscripting))
730    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
731
732  if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
733      Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
734    Diags.Report(diag::err_drv_argument_not_allowed_with)
735      << "ARC migration" << "ObjC migration";
736  }
737
738  InputKind DashX = IK_None;
739  if (const Arg *A = Args.getLastArg(OPT_x)) {
740    DashX = llvm::StringSwitch<InputKind>(A->getValue())
741      .Case("c", IK_C)
742      .Case("cl", IK_OpenCL)
743      .Case("cuda", IK_CUDA)
744      .Case("c++", IK_CXX)
745      .Case("objective-c", IK_ObjC)
746      .Case("objective-c++", IK_ObjCXX)
747      .Case("cpp-output", IK_PreprocessedC)
748      .Case("assembler-with-cpp", IK_Asm)
749      .Case("c++-cpp-output", IK_PreprocessedCXX)
750      .Case("objective-c-cpp-output", IK_PreprocessedObjC)
751      .Case("objc-cpp-output", IK_PreprocessedObjC)
752      .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
753      .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
754      .Case("c-header", IK_C)
755      .Case("cl-header", IK_OpenCL)
756      .Case("objective-c-header", IK_ObjC)
757      .Case("c++-header", IK_CXX)
758      .Case("objective-c++-header", IK_ObjCXX)
759      .Case("ast", IK_AST)
760      .Case("ir", IK_LLVM_IR)
761      .Default(IK_None);
762    if (DashX == IK_None)
763      Diags.Report(diag::err_drv_invalid_value)
764        << A->getAsString(Args) << A->getValue();
765  }
766
767  // '-' is the default input if none is given.
768  std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
769  Opts.Inputs.clear();
770  if (Inputs.empty())
771    Inputs.push_back("-");
772  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
773    InputKind IK = DashX;
774    if (IK == IK_None) {
775      IK = FrontendOptions::getInputKindForExtension(
776        StringRef(Inputs[i]).rsplit('.').second);
777      // FIXME: Remove this hack.
778      if (i == 0)
779        DashX = IK;
780    }
781    Opts.Inputs.push_back(FrontendInputFile(Inputs[i], IK));
782  }
783
784  return DashX;
785}
786
787std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
788                                                 void *MainAddr) {
789  llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
790
791  if (!P.isEmpty()) {
792    P.eraseComponent();  // Remove /clang from foo/bin/clang
793    P.eraseComponent();  // Remove /bin   from foo/bin
794
795    // Get foo/lib/clang/<version>/include
796    P.appendComponent("lib");
797    P.appendComponent("clang");
798    P.appendComponent(CLANG_VERSION_STRING);
799  }
800
801  return P.str();
802}
803
804static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
805  using namespace options;
806  Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
807  Opts.Verbose = Args.hasArg(OPT_v);
808  Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
809  Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
810  Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
811  if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
812    Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
813  Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
814  Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodule_cache_path);
815  Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
816
817  // Add -I..., -F..., and -index-header-map options in order.
818  bool IsIndexHeaderMap = false;
819  for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F,
820                                             OPT_index_header_map),
821       ie = Args.filtered_end(); it != ie; ++it) {
822    if ((*it)->getOption().matches(OPT_index_header_map)) {
823      // -index-header-map applies to the next -I or -F.
824      IsIndexHeaderMap = true;
825      continue;
826    }
827
828    frontend::IncludeDirGroup Group
829      = IsIndexHeaderMap? frontend::IndexHeaderMap : frontend::Angled;
830
831    Opts.AddPath((*it)->getValue(), Group, true,
832                 /*IsFramework=*/ (*it)->getOption().matches(OPT_F), false);
833    IsIndexHeaderMap = false;
834  }
835
836  // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
837  StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
838  for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
839                                             OPT_iwithprefixbefore),
840         ie = Args.filtered_end(); it != ie; ++it) {
841    const Arg *A = *it;
842    if (A->getOption().matches(OPT_iprefix))
843      Prefix = A->getValue();
844    else if (A->getOption().matches(OPT_iwithprefix))
845      Opts.AddPath(Prefix.str() + A->getValue(),
846                   frontend::System, false, false, false);
847    else
848      Opts.AddPath(Prefix.str() + A->getValue(),
849                   frontend::Angled, false, false, false);
850  }
851
852  for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
853         ie = Args.filtered_end(); it != ie; ++it)
854    Opts.AddPath((*it)->getValue(), frontend::After, true, false, false);
855  for (arg_iterator it = Args.filtered_begin(OPT_iquote),
856         ie = Args.filtered_end(); it != ie; ++it)
857    Opts.AddPath((*it)->getValue(), frontend::Quoted, true, false, false);
858  for (arg_iterator it = Args.filtered_begin(OPT_isystem,
859         OPT_iwithsysroot), ie = Args.filtered_end(); it != ie; ++it)
860    Opts.AddPath((*it)->getValue(), frontend::System, true, false,
861                 !(*it)->getOption().matches(OPT_iwithsysroot));
862  for (arg_iterator it = Args.filtered_begin(OPT_iframework),
863         ie = Args.filtered_end(); it != ie; ++it)
864    Opts.AddPath((*it)->getValue(), frontend::System, true, true,
865                 true);
866
867  // Add the paths for the various language specific isystem flags.
868  for (arg_iterator it = Args.filtered_begin(OPT_c_isystem),
869       ie = Args.filtered_end(); it != ie; ++it)
870    Opts.AddPath((*it)->getValue(), frontend::CSystem, true, false, true);
871  for (arg_iterator it = Args.filtered_begin(OPT_cxx_isystem),
872       ie = Args.filtered_end(); it != ie; ++it)
873    Opts.AddPath((*it)->getValue(), frontend::CXXSystem, true, false, true);
874  for (arg_iterator it = Args.filtered_begin(OPT_objc_isystem),
875       ie = Args.filtered_end(); it != ie; ++it)
876    Opts.AddPath((*it)->getValue(), frontend::ObjCSystem, true, false,true);
877  for (arg_iterator it = Args.filtered_begin(OPT_objcxx_isystem),
878       ie = Args.filtered_end(); it != ie; ++it)
879    Opts.AddPath((*it)->getValue(), frontend::ObjCXXSystem, true, false,
880                 true);
881
882  // Add the internal paths from a driver that detects standard include paths.
883  for (arg_iterator I = Args.filtered_begin(OPT_internal_isystem,
884                                            OPT_internal_externc_isystem),
885                    E = Args.filtered_end();
886       I != E; ++I)
887    Opts.AddPath((*I)->getValue(), frontend::System,
888                 false, false, /*IgnoreSysRoot=*/true, /*IsInternal=*/true,
889                 (*I)->getOption().matches(OPT_internal_externc_isystem));
890
891  // Add the path prefixes which are implicitly treated as being system headers.
892  for (arg_iterator I = Args.filtered_begin(OPT_isystem_prefix,
893                                            OPT_ino_system_prefix),
894                    E = Args.filtered_end();
895       I != E; ++I)
896    Opts.AddSystemHeaderPrefix((*I)->getValue(),
897                               (*I)->getOption().matches(OPT_isystem_prefix));
898}
899
900void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
901                                         LangStandard::Kind LangStd) {
902  // Set some properties which depend solely on the input kind; it would be nice
903  // to move these to the language standard, and have the driver resolve the
904  // input kind + language standard.
905  if (IK == IK_Asm) {
906    Opts.AsmPreprocessor = 1;
907  } else if (IK == IK_ObjC ||
908             IK == IK_ObjCXX ||
909             IK == IK_PreprocessedObjC ||
910             IK == IK_PreprocessedObjCXX) {
911    Opts.ObjC1 = Opts.ObjC2 = 1;
912  }
913
914  if (LangStd == LangStandard::lang_unspecified) {
915    // Based on the base language, pick one.
916    switch (IK) {
917    case IK_None:
918    case IK_AST:
919    case IK_LLVM_IR:
920      llvm_unreachable("Invalid input kind!");
921    case IK_OpenCL:
922      LangStd = LangStandard::lang_opencl;
923      break;
924    case IK_CUDA:
925      LangStd = LangStandard::lang_cuda;
926      break;
927    case IK_Asm:
928    case IK_C:
929    case IK_PreprocessedC:
930    case IK_ObjC:
931    case IK_PreprocessedObjC:
932      LangStd = LangStandard::lang_gnu99;
933      break;
934    case IK_CXX:
935    case IK_PreprocessedCXX:
936    case IK_ObjCXX:
937    case IK_PreprocessedObjCXX:
938      LangStd = LangStandard::lang_gnucxx98;
939      break;
940    }
941  }
942
943  const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
944  Opts.LineComment = Std.hasLineComments();
945  Opts.C99 = Std.isC99();
946  Opts.C11 = Std.isC11();
947  Opts.CPlusPlus = Std.isCPlusPlus();
948  Opts.CPlusPlus0x = Std.isCPlusPlus0x();
949  Opts.CPlusPlus1y = Std.isCPlusPlus1y();
950  Opts.Digraphs = Std.hasDigraphs();
951  Opts.GNUMode = Std.isGNUMode();
952  Opts.GNUInline = !Std.isC99();
953  Opts.HexFloats = Std.hasHexFloats();
954  Opts.ImplicitInt = Std.hasImplicitInt();
955
956  // Set OpenCL Version.
957  if (LangStd == LangStandard::lang_opencl) {
958    Opts.OpenCL = 1;
959    Opts.OpenCLVersion = 100;
960  }
961  else if (LangStd == LangStandard::lang_opencl11) {
962      Opts.OpenCL = 1;
963      Opts.OpenCLVersion = 110;
964  }
965  else if (LangStd == LangStandard::lang_opencl12) {
966    Opts.OpenCL = 1;
967    Opts.OpenCLVersion = 120;
968  }
969
970  // OpenCL has some additional defaults.
971  if (Opts.OpenCL) {
972    Opts.AltiVec = 0;
973    Opts.CXXOperatorNames = 1;
974    Opts.LaxVectorConversions = 0;
975    Opts.DefaultFPContract = 1;
976  }
977
978  if (LangStd == LangStandard::lang_cuda)
979    Opts.CUDA = 1;
980
981  // OpenCL and C++ both have bool, true, false keywords.
982  Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
983
984  // C++ has wchar_t keyword.
985  Opts.WChar = Opts.CPlusPlus;
986
987  Opts.GNUKeywords = Opts.GNUMode;
988  Opts.CXXOperatorNames = Opts.CPlusPlus;
989
990  // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
991  // is specified, or -std is set to a conforming mode.
992  Opts.Trigraphs = !Opts.GNUMode;
993
994  Opts.DollarIdents = !Opts.AsmPreprocessor;
995}
996
997static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
998                          DiagnosticsEngine &Diags) {
999  // FIXME: Cleanup per-file based stuff.
1000  LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1001  if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1002    LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1003#define LANGSTANDARD(id, name, desc, features) \
1004      .Case(name, LangStandard::lang_##id)
1005#include "clang/Frontend/LangStandards.def"
1006      .Default(LangStandard::lang_unspecified);
1007    if (LangStd == LangStandard::lang_unspecified)
1008      Diags.Report(diag::err_drv_invalid_value)
1009        << A->getAsString(Args) << A->getValue();
1010    else {
1011      // Valid standard, check to make sure language and standard are compatable.
1012      const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1013      switch (IK) {
1014      case IK_C:
1015      case IK_ObjC:
1016      case IK_PreprocessedC:
1017      case IK_PreprocessedObjC:
1018        if (!(Std.isC89() || Std.isC99()))
1019          Diags.Report(diag::err_drv_argument_not_allowed_with)
1020            << A->getAsString(Args) << "C/ObjC";
1021        break;
1022      case IK_CXX:
1023      case IK_ObjCXX:
1024      case IK_PreprocessedCXX:
1025      case IK_PreprocessedObjCXX:
1026        if (!Std.isCPlusPlus())
1027          Diags.Report(diag::err_drv_argument_not_allowed_with)
1028            << A->getAsString(Args) << "C++/ObjC++";
1029        break;
1030      case IK_OpenCL:
1031        if (!Std.isC99())
1032          Diags.Report(diag::err_drv_argument_not_allowed_with)
1033            << A->getAsString(Args) << "OpenCL";
1034        break;
1035      case IK_CUDA:
1036        if (!Std.isCPlusPlus())
1037          Diags.Report(diag::err_drv_argument_not_allowed_with)
1038            << A->getAsString(Args) << "CUDA";
1039        break;
1040      default:
1041        break;
1042      }
1043    }
1044  }
1045
1046  // -cl-std only applies for OpenCL language standards.
1047  // Override the -std option in this case.
1048  if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1049    LangStandard::Kind OpenCLLangStd
1050    = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1051    .Case("CL", LangStandard::lang_opencl)
1052    .Case("CL1.1", LangStandard::lang_opencl11)
1053    .Case("CL1.2", LangStandard::lang_opencl12)
1054    .Default(LangStandard::lang_unspecified);
1055
1056    if (OpenCLLangStd == LangStandard::lang_unspecified) {
1057      Diags.Report(diag::err_drv_invalid_value)
1058      << A->getAsString(Args) << A->getValue();
1059    }
1060    else
1061      LangStd = OpenCLLangStd;
1062  }
1063
1064  CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1065
1066  // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1067  // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1068  // while a subset (the non-C++ GNU keywords) is provided by GCC's
1069  // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1070  // name, as it doesn't seem a useful distinction.
1071  Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1072                                  Opts.GNUKeywords);
1073
1074  if (Args.hasArg(OPT_fno_operator_names))
1075    Opts.CXXOperatorNames = 0;
1076
1077  if (Opts.ObjC1) {
1078    if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1079      StringRef value = arg->getValue();
1080      if (Opts.ObjCRuntime.tryParse(value))
1081        Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1082    }
1083
1084    if (Args.hasArg(OPT_fobjc_gc_only))
1085      Opts.setGC(LangOptions::GCOnly);
1086    else if (Args.hasArg(OPT_fobjc_gc))
1087      Opts.setGC(LangOptions::HybridGC);
1088    else if (Args.hasArg(OPT_fobjc_arc)) {
1089      Opts.ObjCAutoRefCount = 1;
1090      if (!Opts.ObjCRuntime.allowsARC())
1091        Diags.Report(diag::err_arc_unsupported_on_runtime);
1092
1093      // Only set ObjCARCWeak if ARC is enabled.
1094      if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1095        Opts.ObjCARCWeak = 1;
1096      else
1097        Opts.ObjCARCWeak = Opts.ObjCRuntime.allowsWeak();
1098    }
1099
1100    if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1101      Opts.ObjCInferRelatedResultType = 0;
1102  }
1103
1104  if (Args.hasArg(OPT_fgnu89_inline))
1105    Opts.GNUInline = 1;
1106
1107  if (Args.hasArg(OPT_fapple_kext)) {
1108    if (!Opts.CPlusPlus)
1109      Diags.Report(diag::warn_c_kext);
1110    else
1111      Opts.AppleKext = 1;
1112  }
1113
1114  if (Args.hasArg(OPT_print_ivar_layout))
1115    Opts.ObjCGCBitmapPrint = 1;
1116  if (Args.hasArg(OPT_fno_constant_cfstrings))
1117    Opts.NoConstantCFStrings = 1;
1118
1119  if (Args.hasArg(OPT_faltivec))
1120    Opts.AltiVec = 1;
1121
1122  if (Args.hasArg(OPT_pthread))
1123    Opts.POSIXThreads = 1;
1124
1125  if (Args.hasArg(OPT_fdelayed_template_parsing))
1126    Opts.DelayedTemplateParsing = 1;
1127
1128  StringRef Vis = Args.getLastArgValue(OPT_fvisibility, "default");
1129  if (Vis == "default")
1130    Opts.setVisibilityMode(DefaultVisibility);
1131  else if (Vis == "hidden")
1132    Opts.setVisibilityMode(HiddenVisibility);
1133  else if (Vis == "protected")
1134    // FIXME: diagnose if target does not support protected visibility
1135    Opts.setVisibilityMode(ProtectedVisibility);
1136  else
1137    Diags.Report(diag::err_drv_invalid_value)
1138      << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1139
1140  if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
1141    StringRef Val = A->getValue();
1142    if (Val == "fast")
1143      Opts.setFPContractMode(LangOptions::FPC_Fast);
1144    else if (Val == "on")
1145      Opts.setFPContractMode(LangOptions::FPC_On);
1146    else if (Val == "off")
1147      Opts.setFPContractMode(LangOptions::FPC_Off);
1148    else
1149      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
1150  }
1151
1152  if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1153    Opts.InlineVisibilityHidden = 1;
1154
1155  if (Args.hasArg(OPT_ftrapv)) {
1156    Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1157    // Set the handler, if one is specified.
1158    Opts.OverflowHandler =
1159        Args.getLastArgValue(OPT_ftrapv_handler);
1160  }
1161  else if (Args.hasArg(OPT_fwrapv))
1162    Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1163
1164  if (Args.hasArg(OPT_trigraphs))
1165    Opts.Trigraphs = 1;
1166
1167  Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1168                                   OPT_fno_dollars_in_identifiers,
1169                                   Opts.DollarIdents);
1170  Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1171  Opts.MicrosoftExt
1172    = Args.hasArg(OPT_fms_extensions) || Args.hasArg(OPT_fms_compatibility);
1173  Opts.MicrosoftMode = Args.hasArg(OPT_fms_compatibility);
1174  Opts.MSCVersion = Args.getLastArgIntValue(OPT_fmsc_version, 0, Diags);
1175  Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1176  Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1177  Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
1178                                   Opts.ConstStrings);
1179  if (Args.hasArg(OPT_fno_lax_vector_conversions))
1180    Opts.LaxVectorConversions = 0;
1181  if (Args.hasArg(OPT_fno_threadsafe_statics))
1182    Opts.ThreadsafeStatics = 0;
1183  Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1184  Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
1185  Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
1186  Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1187  Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
1188
1189  Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1190  Opts.Blocks = Args.hasArg(OPT_fblocks);
1191  Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
1192  Opts.Modules = Args.hasArg(OPT_fmodules);
1193  Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1194  Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
1195  Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1196  Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1197  Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1198  Opts.FormatExtensions = Args.hasArg(OPT_fformat_extensions);
1199  Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1200  Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1201  Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1202  Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1203  Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1204  Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1205  Opts.InstantiationDepth = Args.getLastArgIntValue(OPT_ftemplate_depth, 512,
1206                                                    Diags);
1207  Opts.ConstexprCallDepth = Args.getLastArgIntValue(OPT_fconstexpr_depth, 512,
1208                                                    Diags);
1209  Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
1210  Opts.NumLargeByValueCopy = Args.getLastArgIntValue(OPT_Wlarge_by_value_copy_EQ,
1211                                                    0, Diags);
1212  Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
1213  Opts.ObjCConstantStringClass =
1214    Args.getLastArgValue(OPT_fconstant_string_class);
1215  Opts.ObjCDefaultSynthProperties =
1216    Args.hasArg(OPT_fobjc_default_synthesize_properties);
1217  Opts.EncodeExtendedBlockSig =
1218    Args.hasArg(OPT_fencode_extended_block_signature);
1219  Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1220  Opts.PackStruct = Args.getLastArgIntValue(OPT_fpack_struct_EQ, 0, Diags);
1221  Opts.PICLevel = Args.getLastArgIntValue(OPT_pic_level, 0, Diags);
1222  Opts.PIELevel = Args.getLastArgIntValue(OPT_pie_level, 0, Diags);
1223  Opts.Static = Args.hasArg(OPT_static_define);
1224  Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
1225  Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
1226                        || Args.hasArg(OPT_fdump_record_layouts);
1227  Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1228  Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1229  Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1230  Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
1231  Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
1232  Opts.MRTD = Args.hasArg(OPT_mrtd);
1233  Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
1234  Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
1235  Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
1236  Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
1237  Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
1238  Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
1239  Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
1240  Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
1241
1242  // Record whether the __DEPRECATED define was requested.
1243  Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
1244                                 OPT_fno_deprecated_macro,
1245                                 Opts.Deprecated);
1246
1247  // FIXME: Eliminate this dependency.
1248  unsigned Opt = getOptimizationLevel(Args, IK, Diags),
1249       OptSize = getOptimizationLevelSize(Args, IK, Diags);
1250  Opts.Optimize = Opt != 0;
1251  Opts.OptimizeSize = OptSize != 0;
1252
1253  // This is the __NO_INLINE__ define, which just depends on things like the
1254  // optimization level and -fno-inline, not actually whether the backend has
1255  // inlining enabled.
1256  Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
1257
1258  Opts.FastMath = Args.hasArg(OPT_ffast_math);
1259  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only);
1260
1261  Opts.EmitMicrosoftInlineAsm = Args.hasArg(OPT_fenable_experimental_ms_inline_asm);
1262
1263  Opts.RetainCommentsFromSystemHeaders =
1264      Args.hasArg(OPT_fretain_comments_from_system_headers);
1265
1266  unsigned SSP = Args.getLastArgIntValue(OPT_stack_protector, 0, Diags);
1267  switch (SSP) {
1268  default:
1269    Diags.Report(diag::err_drv_invalid_value)
1270      << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1271    break;
1272  case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
1273  case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
1274  case 2: Opts.setStackProtector(LangOptions::SSPReq); break;
1275  }
1276
1277  // Parse -fsanitize= arguments.
1278  std::vector<std::string> Sanitizers = Args.getAllArgValues(OPT_fsanitize_EQ);
1279  for (unsigned I = 0, N = Sanitizers.size(); I != N; ++I) {
1280    // Since the Opts.Sanitize* values are bitfields, it's a little tricky to
1281    // efficiently map string values to them. Perform the mapping indirectly:
1282    // convert strings to enumerated values, then switch over the enum to set
1283    // the right bitfield value.
1284    enum Sanitizer {
1285#define SANITIZER(NAME, ID) \
1286      ID,
1287#include "clang/Basic/Sanitizers.def"
1288      Unknown
1289    };
1290    switch (llvm::StringSwitch<unsigned>(Sanitizers[I])
1291#define SANITIZER(NAME, ID) \
1292              .Case(NAME, ID)
1293#include "clang/Basic/Sanitizers.def"
1294              .Default(Unknown)) {
1295#define SANITIZER(NAME, ID) \
1296    case ID: \
1297      Opts.Sanitize##ID = true; \
1298      break;
1299#include "clang/Basic/Sanitizers.def"
1300
1301    case Unknown:
1302      Diags.Report(diag::err_drv_invalid_value)
1303        << "-fsanitize=" << Sanitizers[I];
1304      break;
1305    }
1306  }
1307}
1308
1309static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1310                                  FileManager &FileMgr,
1311                                  DiagnosticsEngine &Diags) {
1312  using namespace options;
1313  Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1314  Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1315  if (const Arg *A = Args.getLastArg(OPT_token_cache))
1316      Opts.TokenCache = A->getValue();
1317  else
1318    Opts.TokenCache = Opts.ImplicitPTHInclude;
1319  Opts.UsePredefines = !Args.hasArg(OPT_undef);
1320  Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1321  Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1322
1323  Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
1324  for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
1325         ie = Args.filtered_end(); it != ie; ++it) {
1326    const Arg *A = *it;
1327    Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
1328  }
1329
1330  if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1331    StringRef Value(A->getValue());
1332    size_t Comma = Value.find(',');
1333    unsigned Bytes = 0;
1334    unsigned EndOfLine = 0;
1335
1336    if (Comma == StringRef::npos ||
1337        Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1338        Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1339      Diags.Report(diag::err_drv_preamble_format);
1340    else {
1341      Opts.PrecompiledPreambleBytes.first = Bytes;
1342      Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1343    }
1344  }
1345
1346  // Add macros from the command line.
1347  for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1348         ie = Args.filtered_end(); it != ie; ++it) {
1349    if ((*it)->getOption().matches(OPT_D))
1350      Opts.addMacroDef((*it)->getValue());
1351    else
1352      Opts.addMacroUndef((*it)->getValue());
1353  }
1354
1355  Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1356
1357  // Add the ordered list of -includes.
1358  for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1359                                             OPT_include_pth),
1360         ie = Args.filtered_end(); it != ie; ++it) {
1361    const Arg *A = *it;
1362    Opts.Includes.push_back(A->getValue());
1363  }
1364
1365  for (arg_iterator it = Args.filtered_begin(OPT_chain_include),
1366         ie = Args.filtered_end(); it != ie; ++it) {
1367    const Arg *A = *it;
1368    Opts.ChainedIncludes.push_back(A->getValue());
1369  }
1370
1371  // Include 'altivec.h' if -faltivec option present
1372  if (Args.hasArg(OPT_faltivec))
1373    Opts.Includes.push_back("altivec.h");
1374
1375  for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1376         ie = Args.filtered_end(); it != ie; ++it) {
1377    const Arg *A = *it;
1378    std::pair<StringRef,StringRef> Split =
1379      StringRef(A->getValue()).split(';');
1380
1381    if (Split.second.empty()) {
1382      Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1383      continue;
1384    }
1385
1386    Opts.addRemappedFile(Split.first, Split.second);
1387  }
1388
1389  if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
1390    StringRef Name = A->getValue();
1391    unsigned Library = llvm::StringSwitch<unsigned>(Name)
1392      .Case("libc++", ARCXX_libcxx)
1393      .Case("libstdc++", ARCXX_libstdcxx)
1394      .Case("none", ARCXX_nolib)
1395      .Default(~0U);
1396    if (Library == ~0U)
1397      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1398    else
1399      Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
1400  }
1401}
1402
1403static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1404                                        ArgList &Args) {
1405  using namespace options;
1406  Opts.ShowCPP = !Args.hasArg(OPT_dM);
1407  Opts.ShowComments = Args.hasArg(OPT_C);
1408  Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1409  Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1410  Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1411  Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
1412}
1413
1414static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1415  using namespace options;
1416  Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1417  Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
1418  Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1419  Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
1420  Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1421  Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1422
1423  // Use the default target triple if unspecified.
1424  if (Opts.Triple.empty())
1425    Opts.Triple = llvm::sys::getDefaultTargetTriple();
1426}
1427
1428//
1429
1430bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1431                                        const char *const *ArgBegin,
1432                                        const char *const *ArgEnd,
1433                                        DiagnosticsEngine &Diags) {
1434  bool Success = true;
1435
1436  // Parse the arguments.
1437  OwningPtr<OptTable> Opts(createDriverOptTable());
1438  unsigned MissingArgIndex, MissingArgCount;
1439  OwningPtr<InputArgList> Args(
1440    Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1441
1442  // Check for missing argument error.
1443  if (MissingArgCount) {
1444    Diags.Report(diag::err_drv_missing_argument)
1445      << Args->getArgString(MissingArgIndex) << MissingArgCount;
1446    Success = false;
1447  }
1448
1449  // Issue errors on unknown arguments.
1450  for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1451         ie = Args->filtered_end(); it != ie; ++it) {
1452    Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
1453    Success = false;
1454  }
1455
1456  // Issue errors on arguments that are not valid for CC1.
1457  for (ArgList::iterator I = Args->begin(), E = Args->end();
1458       I != E; ++I) {
1459    if (!(*I)->getOption().hasFlag(options::CC1Option)) {
1460      Diags.Report(diag::err_drv_unknown_argument) << (*I)->getAsString(*Args);
1461      Success = false;
1462    }
1463  }
1464
1465  Success = ParseAnalyzerArgs(*Res.getAnalyzerOpts(), *Args, Diags) && Success;
1466  Success = ParseMigratorArgs(Res.getMigratorOpts(), *Args) && Success;
1467  ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1468  Success = ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, &Diags)
1469            && Success;
1470  ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
1471  // FIXME: We shouldn't have to pass the DashX option around here
1472  InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1473  Success = ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags)
1474            && Success;
1475  ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1476  if (DashX != IK_AST && DashX != IK_LLVM_IR) {
1477    ParseLangArgs(*Res.getLangOpts(), *Args, DashX, Diags);
1478    if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
1479      Res.getLangOpts()->ObjCExceptions = 1;
1480  }
1481  // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
1482  // PCH file and find the original header name. Remove the need to do that in
1483  // ParsePreprocessorArgs and remove the FileManager
1484  // parameters from the function and the "FileManager.h" #include.
1485  FileManager FileMgr(Res.getFileSystemOpts());
1486  ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
1487  ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
1488  ParseTargetArgs(Res.getTargetOpts(), *Args);
1489
1490  return Success;
1491}
1492
1493namespace {
1494
1495  class ModuleSignature {
1496    llvm::SmallVector<uint64_t, 16> Data;
1497    unsigned CurBit;
1498    uint64_t CurValue;
1499
1500  public:
1501    ModuleSignature() : CurBit(0), CurValue(0) { }
1502
1503    void add(uint64_t Value, unsigned Bits);
1504    void add(StringRef Value);
1505    void flush();
1506
1507    llvm::APInt getAsInteger() const;
1508  };
1509}
1510
1511void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
1512  CurValue |= Value << CurBit;
1513  if (CurBit + NumBits < 64) {
1514    CurBit += NumBits;
1515    return;
1516  }
1517
1518  // Add the current word.
1519  Data.push_back(CurValue);
1520
1521  if (CurBit)
1522    CurValue = Value >> (64-CurBit);
1523  else
1524    CurValue = 0;
1525  CurBit = (CurBit+NumBits) & 63;
1526}
1527
1528void ModuleSignature::flush() {
1529  if (CurBit == 0)
1530    return;
1531
1532  Data.push_back(CurValue);
1533  CurBit = 0;
1534  CurValue = 0;
1535}
1536
1537void ModuleSignature::add(StringRef Value) {
1538  for (StringRef::iterator I = Value.begin(), IEnd = Value.end(); I != IEnd;++I)
1539    add(*I, 8);
1540}
1541
1542llvm::APInt ModuleSignature::getAsInteger() const {
1543  return llvm::APInt(Data.size() * 64, Data);
1544}
1545
1546std::string CompilerInvocation::getModuleHash() const {
1547  using llvm::hash_code;
1548  using llvm::hash_value;
1549  using llvm::hash_combine;
1550
1551  // Start the signature with the compiler version.
1552  // FIXME: We'd rather use something more cryptographically sound than
1553  // CityHash, but this will do for now.
1554  hash_code code = hash_value(getClangFullRepositoryVersion());
1555
1556  // Extend the signature with the language options
1557#define LANGOPT(Name, Bits, Default, Description) \
1558   code = hash_combine(code, LangOpts->Name);
1559#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
1560  code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
1561#define BENIGN_LANGOPT(Name, Bits, Default, Description)
1562#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
1563#include "clang/Basic/LangOptions.def"
1564
1565  // Extend the signature with the target options.
1566  code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
1567                      TargetOpts->ABI, TargetOpts->CXXABI,
1568                      TargetOpts->LinkerVersion);
1569  for (unsigned i = 0, n = TargetOpts->FeaturesAsWritten.size(); i != n; ++i)
1570    code = hash_combine(code, TargetOpts->FeaturesAsWritten[i]);
1571
1572  // Extend the signature with preprocessor options.
1573  const PreprocessorOptions &ppOpts = getPreprocessorOpts();
1574  code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
1575
1576  std::vector<StringRef> MacroDefs;
1577  for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
1578            I = getPreprocessorOpts().Macros.begin(),
1579         IEnd = getPreprocessorOpts().Macros.end();
1580       I != IEnd; ++I) {
1581    code = hash_combine(code, I->first, I->second);
1582  }
1583
1584  // Extend the signature with the sysroot.
1585  const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
1586  code = hash_combine(code, hsOpts.Sysroot, hsOpts.UseBuiltinIncludes,
1587                      hsOpts.UseStandardSystemIncludes,
1588                      hsOpts.UseStandardCXXIncludes,
1589                      hsOpts.UseLibcxx);
1590
1591  return llvm::APInt(64, code).toString(36, /*Signed=*/false);
1592}
1593