CompilerInvocation.cpp revision ad95481b2769ad61f23afc5e2c31f11c66090657 
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.UseInitArray = Args.hasArg(OPT_fuse_init_array);
390
391  Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
392  Opts.DataSections = Args.hasArg(OPT_fdata_sections);
393
394  Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
395  Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
396  Opts.SanitizeRecover = Args.hasArg(OPT_fsanitize_recover);
397
398  Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
399  Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
400  Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
401  Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
402  Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
403  Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
404  Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
405  Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
406  Opts.SSPBufferSize =
407    Args.getLastArgIntValue(OPT_stack_protector_buffer_size, 8, Diags);
408  Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
409  if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
410    StringRef Val = A->getValue();
411    unsigned StackAlignment = Opts.StackAlignment;
412    Val.getAsInteger(10, StackAlignment);
413    Opts.StackAlignment = StackAlignment;
414  }
415
416  if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
417    StringRef Name = A->getValue();
418    unsigned Method = llvm::StringSwitch<unsigned>(Name)
419      .Case("legacy", CodeGenOptions::Legacy)
420      .Case("non-legacy", CodeGenOptions::NonLegacy)
421      .Case("mixed", CodeGenOptions::Mixed)
422      .Default(~0U);
423    if (Method == ~0U) {
424      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
425      Success = false;
426    } else {
427      Opts.setObjCDispatchMethod(
428        static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
429    }
430  }
431
432  if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
433    StringRef Name = A->getValue();
434    unsigned Model = llvm::StringSwitch<unsigned>(Name)
435        .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
436        .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
437        .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
438        .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
439        .Default(~0U);
440    if (Model == ~0U) {
441      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
442      Success = false;
443    } else {
444      Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
445    }
446  }
447
448  if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
449    StringRef Val = A->getValue();
450    if (Val == "fast")
451      Opts.setFPContractMode(CodeGenOptions::FPC_Fast);
452    else if (Val == "on")
453      Opts.setFPContractMode(CodeGenOptions::FPC_On);
454    else if (Val == "off")
455      Opts.setFPContractMode(CodeGenOptions::FPC_Off);
456    else
457      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
458  }
459
460  return Success;
461}
462
463static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
464                                      ArgList &Args) {
465  using namespace options;
466  Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
467  Opts.Targets = Args.getAllArgValues(OPT_MT);
468  Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
469  Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
470  Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
471  Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
472  Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
473  Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
474}
475
476bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
477                                DiagnosticsEngine *Diags) {
478  using namespace options;
479  bool Success = true;
480
481  Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
482  Opts.DiagnosticSerializationFile =
483    Args.getLastArgValue(OPT_diagnostic_serialized_file);
484  Opts.IgnoreWarnings = Args.hasArg(OPT_w);
485  Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
486  Opts.Pedantic = Args.hasArg(OPT_pedantic);
487  Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
488  Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
489  Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
490  Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
491                                 OPT_fno_show_column,
492                                 /*Default=*/true);
493  Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
494  Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
495  Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
496
497  // Default behavior is to not to show note include stacks.
498  Opts.ShowNoteIncludeStack = false;
499  if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
500                               OPT_fno_diagnostics_show_note_include_stack))
501    if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
502      Opts.ShowNoteIncludeStack = true;
503
504  StringRef ShowOverloads =
505    Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
506  if (ShowOverloads == "best")
507    Opts.setShowOverloads(Ovl_Best);
508  else if (ShowOverloads == "all")
509    Opts.setShowOverloads(Ovl_All);
510  else {
511    Success = false;
512    if (Diags)
513      Diags->Report(diag::err_drv_invalid_value)
514      << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
515      << ShowOverloads;
516  }
517
518  StringRef ShowCategory =
519    Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
520  if (ShowCategory == "none")
521    Opts.ShowCategories = 0;
522  else if (ShowCategory == "id")
523    Opts.ShowCategories = 1;
524  else if (ShowCategory == "name")
525    Opts.ShowCategories = 2;
526  else {
527    Success = false;
528    if (Diags)
529      Diags->Report(diag::err_drv_invalid_value)
530      << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
531      << ShowCategory;
532  }
533
534  StringRef Format =
535    Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
536  if (Format == "clang")
537    Opts.setFormat(DiagnosticOptions::Clang);
538  else if (Format == "msvc")
539    Opts.setFormat(DiagnosticOptions::Msvc);
540  else if (Format == "vi")
541    Opts.setFormat(DiagnosticOptions::Vi);
542  else {
543    Success = false;
544    if (Diags)
545      Diags->Report(diag::err_drv_invalid_value)
546      << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
547      << Format;
548  }
549
550  Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
551  Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
552  Opts.ShowPresumedLoc = !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
553  Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
554  Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
555  Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
556  Opts.ErrorLimit = Args.getLastArgIntValue(OPT_ferror_limit, 0, Diags);
557  Opts.MacroBacktraceLimit
558    = Args.getLastArgIntValue(OPT_fmacro_backtrace_limit,
559                         DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
560  Opts.TemplateBacktraceLimit
561    = Args.getLastArgIntValue(OPT_ftemplate_backtrace_limit,
562                         DiagnosticOptions::DefaultTemplateBacktraceLimit,
563                         Diags);
564  Opts.ConstexprBacktraceLimit
565    = Args.getLastArgIntValue(OPT_fconstexpr_backtrace_limit,
566                         DiagnosticOptions::DefaultConstexprBacktraceLimit,
567                         Diags);
568  Opts.TabStop = Args.getLastArgIntValue(OPT_ftabstop,
569                                    DiagnosticOptions::DefaultTabStop, Diags);
570  if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
571    Opts.TabStop = DiagnosticOptions::DefaultTabStop;
572    if (Diags)
573      Diags->Report(diag::warn_ignoring_ftabstop_value)
574      << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
575  }
576  Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
577  Opts.DumpBuildInformation = Args.getLastArgValue(OPT_dump_build_information);
578  addWarningArgs(Args, Opts.Warnings);
579
580  return Success;
581}
582
583static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
584  Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
585}
586
587static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
588                                   DiagnosticsEngine &Diags) {
589  using namespace options;
590  Opts.ProgramAction = frontend::ParseSyntaxOnly;
591  if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
592    switch (A->getOption().getID()) {
593    default:
594      llvm_unreachable("Invalid option in group!");
595    case OPT_ast_list:
596      Opts.ProgramAction = frontend::ASTDeclList; break;
597    case OPT_ast_dump:
598      Opts.ProgramAction = frontend::ASTDump; break;
599    case OPT_ast_dump_xml:
600      Opts.ProgramAction = frontend::ASTDumpXML; break;
601    case OPT_ast_print:
602      Opts.ProgramAction = frontend::ASTPrint; break;
603    case OPT_ast_view:
604      Opts.ProgramAction = frontend::ASTView; break;
605    case OPT_dump_raw_tokens:
606      Opts.ProgramAction = frontend::DumpRawTokens; break;
607    case OPT_dump_tokens:
608      Opts.ProgramAction = frontend::DumpTokens; break;
609    case OPT_S:
610      Opts.ProgramAction = frontend::EmitAssembly; break;
611    case OPT_emit_llvm_bc:
612      Opts.ProgramAction = frontend::EmitBC; break;
613    case OPT_emit_html:
614      Opts.ProgramAction = frontend::EmitHTML; break;
615    case OPT_emit_llvm:
616      Opts.ProgramAction = frontend::EmitLLVM; break;
617    case OPT_emit_llvm_only:
618      Opts.ProgramAction = frontend::EmitLLVMOnly; break;
619    case OPT_emit_codegen_only:
620      Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
621    case OPT_emit_obj:
622      Opts.ProgramAction = frontend::EmitObj; break;
623    case OPT_fixit_EQ:
624      Opts.FixItSuffix = A->getValue();
625      // fall-through!
626    case OPT_fixit:
627      Opts.ProgramAction = frontend::FixIt; break;
628    case OPT_emit_module:
629      Opts.ProgramAction = frontend::GenerateModule; break;
630    case OPT_emit_pch:
631      Opts.ProgramAction = frontend::GeneratePCH; break;
632    case OPT_emit_pth:
633      Opts.ProgramAction = frontend::GeneratePTH; break;
634    case OPT_init_only:
635      Opts.ProgramAction = frontend::InitOnly; break;
636    case OPT_fsyntax_only:
637      Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
638    case OPT_print_decl_contexts:
639      Opts.ProgramAction = frontend::PrintDeclContext; break;
640    case OPT_print_preamble:
641      Opts.ProgramAction = frontend::PrintPreamble; break;
642    case OPT_E:
643      Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
644    case OPT_rewrite_macros:
645      Opts.ProgramAction = frontend::RewriteMacros; break;
646    case OPT_rewrite_objc:
647      Opts.ProgramAction = frontend::RewriteObjC; break;
648    case OPT_rewrite_test:
649      Opts.ProgramAction = frontend::RewriteTest; break;
650    case OPT_analyze:
651      Opts.ProgramAction = frontend::RunAnalysis; break;
652    case OPT_migrate:
653      Opts.ProgramAction = frontend::MigrateSource; break;
654    case OPT_Eonly:
655      Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
656    }
657  }
658
659  if (const Arg* A = Args.getLastArg(OPT_plugin)) {
660    Opts.Plugins.push_back(A->getValue(0));
661    Opts.ProgramAction = frontend::PluginAction;
662    Opts.ActionName = A->getValue();
663
664    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
665           end = Args.filtered_end(); it != end; ++it) {
666      if ((*it)->getValue(0) == Opts.ActionName)
667        Opts.PluginArgs.push_back((*it)->getValue(1));
668    }
669  }
670
671  Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
672  Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
673  for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
674    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
675           end = Args.filtered_end(); it != end; ++it) {
676      if ((*it)->getValue(0) == Opts.AddPluginActions[i])
677        Opts.AddPluginArgs[i].push_back((*it)->getValue(1));
678    }
679  }
680
681  if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
682    Opts.CodeCompletionAt =
683      ParsedSourceLocation::FromString(A->getValue());
684    if (Opts.CodeCompletionAt.FileName.empty())
685      Diags.Report(diag::err_drv_invalid_value)
686        << A->getAsString(Args) << A->getValue();
687  }
688  Opts.DisableFree = Args.hasArg(OPT_disable_free);
689
690  Opts.OutputFile = Args.getLastArgValue(OPT_o);
691  Opts.Plugins = Args.getAllArgValues(OPT_load);
692  Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
693  Opts.ShowHelp = Args.hasArg(OPT_help);
694  Opts.ShowStats = Args.hasArg(OPT_print_stats);
695  Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
696  Opts.ShowVersion = Args.hasArg(OPT_version);
697  Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
698  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
699  Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
700  Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
701  Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
702  Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
703  Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
704
705  Opts.CodeCompleteOpts.IncludeMacros
706    = Args.hasArg(OPT_code_completion_macros);
707  Opts.CodeCompleteOpts.IncludeCodePatterns
708    = Args.hasArg(OPT_code_completion_patterns);
709  Opts.CodeCompleteOpts.IncludeGlobals
710    = !Args.hasArg(OPT_no_code_completion_globals);
711  Opts.CodeCompleteOpts.IncludeBriefComments
712    = Args.hasArg(OPT_code_completion_brief_comments);
713
714  Opts.OverrideRecordLayoutsFile
715    = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
716  if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
717                                     OPT_arcmt_modify,
718                                     OPT_arcmt_migrate)) {
719    switch (A->getOption().getID()) {
720    default:
721      llvm_unreachable("missed a case");
722    case OPT_arcmt_check:
723      Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
724      break;
725    case OPT_arcmt_modify:
726      Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
727      break;
728    case OPT_arcmt_migrate:
729      Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
730      break;
731    }
732  }
733  Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
734  Opts.ARCMTMigrateReportOut
735    = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
736  Opts.ARCMTMigrateEmitARCErrors
737    = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
738
739  if (Args.hasArg(OPT_objcmt_migrate_literals))
740    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
741  if (Args.hasArg(OPT_objcmt_migrate_subscripting))
742    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
743
744  if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
745      Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
746    Diags.Report(diag::err_drv_argument_not_allowed_with)
747      << "ARC migration" << "ObjC migration";
748  }
749
750  InputKind DashX = IK_None;
751  if (const Arg *A = Args.getLastArg(OPT_x)) {
752    DashX = llvm::StringSwitch<InputKind>(A->getValue())
753      .Case("c", IK_C)
754      .Case("cl", IK_OpenCL)
755      .Case("cuda", IK_CUDA)
756      .Case("c++", IK_CXX)
757      .Case("objective-c", IK_ObjC)
758      .Case("objective-c++", IK_ObjCXX)
759      .Case("cpp-output", IK_PreprocessedC)
760      .Case("assembler-with-cpp", IK_Asm)
761      .Case("c++-cpp-output", IK_PreprocessedCXX)
762      .Case("objective-c-cpp-output", IK_PreprocessedObjC)
763      .Case("objc-cpp-output", IK_PreprocessedObjC)
764      .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
765      .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
766      .Case("c-header", IK_C)
767      .Case("cl-header", IK_OpenCL)
768      .Case("objective-c-header", IK_ObjC)
769      .Case("c++-header", IK_CXX)
770      .Case("objective-c++-header", IK_ObjCXX)
771      .Case("ast", IK_AST)
772      .Case("ir", IK_LLVM_IR)
773      .Default(IK_None);
774    if (DashX == IK_None)
775      Diags.Report(diag::err_drv_invalid_value)
776        << A->getAsString(Args) << A->getValue();
777  }
778
779  // '-' is the default input if none is given.
780  std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
781  Opts.Inputs.clear();
782  if (Inputs.empty())
783    Inputs.push_back("-");
784  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
785    InputKind IK = DashX;
786    if (IK == IK_None) {
787      IK = FrontendOptions::getInputKindForExtension(
788        StringRef(Inputs[i]).rsplit('.').second);
789      // FIXME: Remove this hack.
790      if (i == 0)
791        DashX = IK;
792    }
793    Opts.Inputs.push_back(FrontendInputFile(Inputs[i], IK));
794  }
795
796  return DashX;
797}
798
799std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
800                                                 void *MainAddr) {
801  llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
802
803  if (!P.isEmpty()) {
804    P.eraseComponent();  // Remove /clang from foo/bin/clang
805    P.eraseComponent();  // Remove /bin   from foo/bin
806
807    // Get foo/lib/clang/<version>/include
808    P.appendComponent("lib");
809    P.appendComponent("clang");
810    P.appendComponent(CLANG_VERSION_STRING);
811  }
812
813  return P.str();
814}
815
816static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
817  using namespace options;
818  Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
819  Opts.Verbose = Args.hasArg(OPT_v);
820  Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
821  Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
822  Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
823  if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
824    Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
825  Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
826  Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodule_cache_path);
827  Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
828
829  // Add -I..., -F..., and -index-header-map options in order.
830  bool IsIndexHeaderMap = false;
831  for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F,
832                                             OPT_index_header_map),
833       ie = Args.filtered_end(); it != ie; ++it) {
834    if ((*it)->getOption().matches(OPT_index_header_map)) {
835      // -index-header-map applies to the next -I or -F.
836      IsIndexHeaderMap = true;
837      continue;
838    }
839
840    frontend::IncludeDirGroup Group
841      = IsIndexHeaderMap? frontend::IndexHeaderMap : frontend::Angled;
842
843    Opts.AddPath((*it)->getValue(), Group, true,
844                 /*IsFramework=*/ (*it)->getOption().matches(OPT_F), false);
845    IsIndexHeaderMap = false;
846  }
847
848  // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
849  StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
850  for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
851                                             OPT_iwithprefixbefore),
852         ie = Args.filtered_end(); it != ie; ++it) {
853    const Arg *A = *it;
854    if (A->getOption().matches(OPT_iprefix))
855      Prefix = A->getValue();
856    else if (A->getOption().matches(OPT_iwithprefix))
857      Opts.AddPath(Prefix.str() + A->getValue(),
858                   frontend::System, false, false, false);
859    else
860      Opts.AddPath(Prefix.str() + A->getValue(),
861                   frontend::Angled, false, false, false);
862  }
863
864  for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
865         ie = Args.filtered_end(); it != ie; ++it)
866    Opts.AddPath((*it)->getValue(), frontend::After, true, false, false);
867  for (arg_iterator it = Args.filtered_begin(OPT_iquote),
868         ie = Args.filtered_end(); it != ie; ++it)
869    Opts.AddPath((*it)->getValue(), frontend::Quoted, true, false, false);
870  for (arg_iterator it = Args.filtered_begin(OPT_isystem,
871         OPT_iwithsysroot), ie = Args.filtered_end(); it != ie; ++it)
872    Opts.AddPath((*it)->getValue(), frontend::System, true, false,
873                 !(*it)->getOption().matches(OPT_iwithsysroot));
874  for (arg_iterator it = Args.filtered_begin(OPT_iframework),
875         ie = Args.filtered_end(); it != ie; ++it)
876    Opts.AddPath((*it)->getValue(), frontend::System, true, true,
877                 true);
878
879  // Add the paths for the various language specific isystem flags.
880  for (arg_iterator it = Args.filtered_begin(OPT_c_isystem),
881       ie = Args.filtered_end(); it != ie; ++it)
882    Opts.AddPath((*it)->getValue(), frontend::CSystem, true, false, true);
883  for (arg_iterator it = Args.filtered_begin(OPT_cxx_isystem),
884       ie = Args.filtered_end(); it != ie; ++it)
885    Opts.AddPath((*it)->getValue(), frontend::CXXSystem, true, false, true);
886  for (arg_iterator it = Args.filtered_begin(OPT_objc_isystem),
887       ie = Args.filtered_end(); it != ie; ++it)
888    Opts.AddPath((*it)->getValue(), frontend::ObjCSystem, true, false,true);
889  for (arg_iterator it = Args.filtered_begin(OPT_objcxx_isystem),
890       ie = Args.filtered_end(); it != ie; ++it)
891    Opts.AddPath((*it)->getValue(), frontend::ObjCXXSystem, true, false,
892                 true);
893
894  // Add the internal paths from a driver that detects standard include paths.
895  for (arg_iterator I = Args.filtered_begin(OPT_internal_isystem,
896                                            OPT_internal_externc_isystem),
897                    E = Args.filtered_end();
898       I != E; ++I)
899    Opts.AddPath((*I)->getValue(), frontend::System,
900                 false, false, /*IgnoreSysRoot=*/true, /*IsInternal=*/true,
901                 (*I)->getOption().matches(OPT_internal_externc_isystem));
902
903  // Add the path prefixes which are implicitly treated as being system headers.
904  for (arg_iterator I = Args.filtered_begin(OPT_isystem_prefix,
905                                            OPT_ino_system_prefix),
906                    E = Args.filtered_end();
907       I != E; ++I)
908    Opts.AddSystemHeaderPrefix((*I)->getValue(),
909                               (*I)->getOption().matches(OPT_isystem_prefix));
910}
911
912void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
913                                         LangStandard::Kind LangStd) {
914  // Set some properties which depend solely on the input kind; it would be nice
915  // to move these to the language standard, and have the driver resolve the
916  // input kind + language standard.
917  if (IK == IK_Asm) {
918    Opts.AsmPreprocessor = 1;
919  } else if (IK == IK_ObjC ||
920             IK == IK_ObjCXX ||
921             IK == IK_PreprocessedObjC ||
922             IK == IK_PreprocessedObjCXX) {
923    Opts.ObjC1 = Opts.ObjC2 = 1;
924  }
925
926  if (LangStd == LangStandard::lang_unspecified) {
927    // Based on the base language, pick one.
928    switch (IK) {
929    case IK_None:
930    case IK_AST:
931    case IK_LLVM_IR:
932      llvm_unreachable("Invalid input kind!");
933    case IK_OpenCL:
934      LangStd = LangStandard::lang_opencl;
935      break;
936    case IK_CUDA:
937      LangStd = LangStandard::lang_cuda;
938      break;
939    case IK_Asm:
940    case IK_C:
941    case IK_PreprocessedC:
942    case IK_ObjC:
943    case IK_PreprocessedObjC:
944      LangStd = LangStandard::lang_gnu99;
945      break;
946    case IK_CXX:
947    case IK_PreprocessedCXX:
948    case IK_ObjCXX:
949    case IK_PreprocessedObjCXX:
950      LangStd = LangStandard::lang_gnucxx98;
951      break;
952    }
953  }
954
955  const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
956  Opts.LineComment = Std.hasLineComments();
957  Opts.C99 = Std.isC99();
958  Opts.C11 = Std.isC11();
959  Opts.CPlusPlus = Std.isCPlusPlus();
960  Opts.CPlusPlus0x = Std.isCPlusPlus0x();
961  Opts.CPlusPlus1y = Std.isCPlusPlus1y();
962  Opts.Digraphs = Std.hasDigraphs();
963  Opts.GNUMode = Std.isGNUMode();
964  Opts.GNUInline = !Std.isC99();
965  Opts.HexFloats = Std.hasHexFloats();
966  Opts.ImplicitInt = Std.hasImplicitInt();
967
968  // Set OpenCL Version.
969  if (LangStd == LangStandard::lang_opencl) {
970    Opts.OpenCL = 1;
971    Opts.OpenCLVersion = 100;
972  }
973  else if (LangStd == LangStandard::lang_opencl11) {
974      Opts.OpenCL = 1;
975      Opts.OpenCLVersion = 110;
976  }
977  else if (LangStd == LangStandard::lang_opencl12) {
978    Opts.OpenCL = 1;
979    Opts.OpenCLVersion = 120;
980  }
981
982  // OpenCL has some additional defaults.
983  if (Opts.OpenCL) {
984    Opts.AltiVec = 0;
985    Opts.CXXOperatorNames = 1;
986    Opts.LaxVectorConversions = 0;
987    Opts.DefaultFPContract = 1;
988  }
989
990  if (LangStd == LangStandard::lang_cuda)
991    Opts.CUDA = 1;
992
993  // OpenCL and C++ both have bool, true, false keywords.
994  Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
995
996  // C++ has wchar_t keyword.
997  Opts.WChar = Opts.CPlusPlus;
998
999  Opts.GNUKeywords = Opts.GNUMode;
1000  Opts.CXXOperatorNames = Opts.CPlusPlus;
1001
1002  // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1003  // is specified, or -std is set to a conforming mode.
1004  Opts.Trigraphs = !Opts.GNUMode;
1005
1006  Opts.DollarIdents = !Opts.AsmPreprocessor;
1007}
1008
1009static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1010                          DiagnosticsEngine &Diags) {
1011  // FIXME: Cleanup per-file based stuff.
1012  LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1013  if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1014    LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1015#define LANGSTANDARD(id, name, desc, features) \
1016      .Case(name, LangStandard::lang_##id)
1017#include "clang/Frontend/LangStandards.def"
1018      .Default(LangStandard::lang_unspecified);
1019    if (LangStd == LangStandard::lang_unspecified)
1020      Diags.Report(diag::err_drv_invalid_value)
1021        << A->getAsString(Args) << A->getValue();
1022    else {
1023      // Valid standard, check to make sure language and standard are compatable.
1024      const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1025      switch (IK) {
1026      case IK_C:
1027      case IK_ObjC:
1028      case IK_PreprocessedC:
1029      case IK_PreprocessedObjC:
1030        if (!(Std.isC89() || Std.isC99()))
1031          Diags.Report(diag::err_drv_argument_not_allowed_with)
1032            << A->getAsString(Args) << "C/ObjC";
1033        break;
1034      case IK_CXX:
1035      case IK_ObjCXX:
1036      case IK_PreprocessedCXX:
1037      case IK_PreprocessedObjCXX:
1038        if (!Std.isCPlusPlus())
1039          Diags.Report(diag::err_drv_argument_not_allowed_with)
1040            << A->getAsString(Args) << "C++/ObjC++";
1041        break;
1042      case IK_OpenCL:
1043        if (!Std.isC99())
1044          Diags.Report(diag::err_drv_argument_not_allowed_with)
1045            << A->getAsString(Args) << "OpenCL";
1046        break;
1047      case IK_CUDA:
1048        if (!Std.isCPlusPlus())
1049          Diags.Report(diag::err_drv_argument_not_allowed_with)
1050            << A->getAsString(Args) << "CUDA";
1051        break;
1052      default:
1053        break;
1054      }
1055    }
1056  }
1057
1058  // -cl-std only applies for OpenCL language standards.
1059  // Override the -std option in this case.
1060  if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1061    LangStandard::Kind OpenCLLangStd
1062    = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1063    .Case("CL", LangStandard::lang_opencl)
1064    .Case("CL1.1", LangStandard::lang_opencl11)
1065    .Case("CL1.2", LangStandard::lang_opencl12)
1066    .Default(LangStandard::lang_unspecified);
1067
1068    if (OpenCLLangStd == LangStandard::lang_unspecified) {
1069      Diags.Report(diag::err_drv_invalid_value)
1070      << A->getAsString(Args) << A->getValue();
1071    }
1072    else
1073      LangStd = OpenCLLangStd;
1074  }
1075
1076  CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1077
1078  // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1079  // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1080  // while a subset (the non-C++ GNU keywords) is provided by GCC's
1081  // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1082  // name, as it doesn't seem a useful distinction.
1083  Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1084                                  Opts.GNUKeywords);
1085
1086  if (Args.hasArg(OPT_fno_operator_names))
1087    Opts.CXXOperatorNames = 0;
1088
1089  if (Opts.ObjC1) {
1090    if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1091      StringRef value = arg->getValue();
1092      if (Opts.ObjCRuntime.tryParse(value))
1093        Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1094    }
1095
1096    if (Args.hasArg(OPT_fobjc_gc_only))
1097      Opts.setGC(LangOptions::GCOnly);
1098    else if (Args.hasArg(OPT_fobjc_gc))
1099      Opts.setGC(LangOptions::HybridGC);
1100    else if (Args.hasArg(OPT_fobjc_arc)) {
1101      Opts.ObjCAutoRefCount = 1;
1102      if (!Opts.ObjCRuntime.allowsARC())
1103        Diags.Report(diag::err_arc_unsupported_on_runtime);
1104
1105      // Only set ObjCARCWeak if ARC is enabled.
1106      if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1107        Opts.ObjCARCWeak = 1;
1108      else
1109        Opts.ObjCARCWeak = Opts.ObjCRuntime.allowsWeak();
1110    }
1111
1112    if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1113      Opts.ObjCInferRelatedResultType = 0;
1114  }
1115
1116  if (Args.hasArg(OPT_fgnu89_inline))
1117    Opts.GNUInline = 1;
1118
1119  if (Args.hasArg(OPT_fapple_kext)) {
1120    if (!Opts.CPlusPlus)
1121      Diags.Report(diag::warn_c_kext);
1122    else
1123      Opts.AppleKext = 1;
1124  }
1125
1126  if (Args.hasArg(OPT_print_ivar_layout))
1127    Opts.ObjCGCBitmapPrint = 1;
1128  if (Args.hasArg(OPT_fno_constant_cfstrings))
1129    Opts.NoConstantCFStrings = 1;
1130
1131  if (Args.hasArg(OPT_faltivec))
1132    Opts.AltiVec = 1;
1133
1134  if (Args.hasArg(OPT_pthread))
1135    Opts.POSIXThreads = 1;
1136
1137  if (Args.hasArg(OPT_fdelayed_template_parsing))
1138    Opts.DelayedTemplateParsing = 1;
1139
1140  StringRef Vis = Args.getLastArgValue(OPT_fvisibility, "default");
1141  if (Vis == "default")
1142    Opts.setVisibilityMode(DefaultVisibility);
1143  else if (Vis == "hidden")
1144    Opts.setVisibilityMode(HiddenVisibility);
1145  else if (Vis == "protected")
1146    // FIXME: diagnose if target does not support protected visibility
1147    Opts.setVisibilityMode(ProtectedVisibility);
1148  else
1149    Diags.Report(diag::err_drv_invalid_value)
1150      << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
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.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1199  Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1200  Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1201  Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1202  Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1203  Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1204  Opts.InstantiationDepth = Args.getLastArgIntValue(OPT_ftemplate_depth, 512,
1205                                                    Diags);
1206  Opts.ConstexprCallDepth = Args.getLastArgIntValue(OPT_fconstexpr_depth, 512,
1207                                                    Diags);
1208  Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
1209  Opts.NumLargeByValueCopy = Args.getLastArgIntValue(OPT_Wlarge_by_value_copy_EQ,
1210                                                    0, Diags);
1211  Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
1212  Opts.ObjCConstantStringClass =
1213    Args.getLastArgValue(OPT_fconstant_string_class);
1214  Opts.ObjCDefaultSynthProperties =
1215    Args.hasArg(OPT_fobjc_default_synthesize_properties);
1216  Opts.EncodeExtendedBlockSig =
1217    Args.hasArg(OPT_fencode_extended_block_signature);
1218  Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1219  Opts.PackStruct = Args.getLastArgIntValue(OPT_fpack_struct_EQ, 0, Diags);
1220  Opts.PICLevel = Args.getLastArgIntValue(OPT_pic_level, 0, Diags);
1221  Opts.PIELevel = Args.getLastArgIntValue(OPT_pie_level, 0, Diags);
1222  Opts.Static = Args.hasArg(OPT_static_define);
1223  Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
1224  Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
1225                        || Args.hasArg(OPT_fdump_record_layouts);
1226  Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1227  Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1228  Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1229  Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
1230  Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
1231  Opts.MRTD = Args.hasArg(OPT_mrtd);
1232  Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
1233  Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
1234  Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
1235  Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
1236  Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
1237  Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
1238  Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
1239  Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
1240
1241  // Record whether the __DEPRECATED define was requested.
1242  Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
1243                                 OPT_fno_deprecated_macro,
1244                                 Opts.Deprecated);
1245
1246  // FIXME: Eliminate this dependency.
1247  unsigned Opt = getOptimizationLevel(Args, IK, Diags),
1248       OptSize = getOptimizationLevelSize(Args, IK, Diags);
1249  Opts.Optimize = Opt != 0;
1250  Opts.OptimizeSize = OptSize != 0;
1251
1252  // This is the __NO_INLINE__ define, which just depends on things like the
1253  // optimization level and -fno-inline, not actually whether the backend has
1254  // inlining enabled.
1255  Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
1256
1257  Opts.FastMath = Args.hasArg(OPT_ffast_math);
1258  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only);
1259
1260  Opts.EmitMicrosoftInlineAsm = Args.hasArg(OPT_fenable_experimental_ms_inline_asm);
1261
1262  Opts.RetainCommentsFromSystemHeaders =
1263      Args.hasArg(OPT_fretain_comments_from_system_headers);
1264
1265  unsigned SSP = Args.getLastArgIntValue(OPT_stack_protector, 0, Diags);
1266  switch (SSP) {
1267  default:
1268    Diags.Report(diag::err_drv_invalid_value)
1269      << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1270    break;
1271  case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
1272  case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
1273  case 2: Opts.setStackProtector(LangOptions::SSPReq); break;
1274  }
1275
1276  // Parse -fsanitize= arguments.
1277  std::vector<std::string> Sanitizers = Args.getAllArgValues(OPT_fsanitize_EQ);
1278  for (unsigned I = 0, N = Sanitizers.size(); I != N; ++I) {
1279    // Since the Opts.Sanitize* values are bitfields, it's a little tricky to
1280    // efficiently map string values to them. Perform the mapping indirectly:
1281    // convert strings to enumerated values, then switch over the enum to set
1282    // the right bitfield value.
1283    enum Sanitizer {
1284#define SANITIZER(NAME, ID) \
1285      ID,
1286#include "clang/Basic/Sanitizers.def"
1287      Unknown
1288    };
1289    switch (llvm::StringSwitch<unsigned>(Sanitizers[I])
1290#define SANITIZER(NAME, ID) \
1291              .Case(NAME, ID)
1292#include "clang/Basic/Sanitizers.def"
1293              .Default(Unknown)) {
1294#define SANITIZER(NAME, ID) \
1295    case ID: \
1296      Opts.Sanitize##ID = true; \
1297      break;
1298#include "clang/Basic/Sanitizers.def"
1299
1300    case Unknown:
1301      Diags.Report(diag::err_drv_invalid_value)
1302        << "-fsanitize=" << Sanitizers[I];
1303      break;
1304    }
1305  }
1306}
1307
1308static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1309                                  FileManager &FileMgr,
1310                                  DiagnosticsEngine &Diags) {
1311  using namespace options;
1312  Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1313  Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1314  if (const Arg *A = Args.getLastArg(OPT_token_cache))
1315      Opts.TokenCache = A->getValue();
1316  else
1317    Opts.TokenCache = Opts.ImplicitPTHInclude;
1318  Opts.UsePredefines = !Args.hasArg(OPT_undef);
1319  Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1320  Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1321
1322  Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
1323  for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
1324         ie = Args.filtered_end(); it != ie; ++it) {
1325    const Arg *A = *it;
1326    Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
1327  }
1328
1329  if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1330    StringRef Value(A->getValue());
1331    size_t Comma = Value.find(',');
1332    unsigned Bytes = 0;
1333    unsigned EndOfLine = 0;
1334
1335    if (Comma == StringRef::npos ||
1336        Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1337        Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1338      Diags.Report(diag::err_drv_preamble_format);
1339    else {
1340      Opts.PrecompiledPreambleBytes.first = Bytes;
1341      Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1342    }
1343  }
1344
1345  // Add macros from the command line.
1346  for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1347         ie = Args.filtered_end(); it != ie; ++it) {
1348    if ((*it)->getOption().matches(OPT_D))
1349      Opts.addMacroDef((*it)->getValue());
1350    else
1351      Opts.addMacroUndef((*it)->getValue());
1352  }
1353
1354  Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1355
1356  // Add the ordered list of -includes.
1357  for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1358                                             OPT_include_pth),
1359         ie = Args.filtered_end(); it != ie; ++it) {
1360    const Arg *A = *it;
1361    Opts.Includes.push_back(A->getValue());
1362  }
1363
1364  for (arg_iterator it = Args.filtered_begin(OPT_chain_include),
1365         ie = Args.filtered_end(); it != ie; ++it) {
1366    const Arg *A = *it;
1367    Opts.ChainedIncludes.push_back(A->getValue());
1368  }
1369
1370  // Include 'altivec.h' if -faltivec option present
1371  if (Args.hasArg(OPT_faltivec))
1372    Opts.Includes.push_back("altivec.h");
1373
1374  for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1375         ie = Args.filtered_end(); it != ie; ++it) {
1376    const Arg *A = *it;
1377    std::pair<StringRef,StringRef> Split =
1378      StringRef(A->getValue()).split(';');
1379
1380    if (Split.second.empty()) {
1381      Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1382      continue;
1383    }
1384
1385    Opts.addRemappedFile(Split.first, Split.second);
1386  }
1387
1388  if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
1389    StringRef Name = A->getValue();
1390    unsigned Library = llvm::StringSwitch<unsigned>(Name)
1391      .Case("libc++", ARCXX_libcxx)
1392      .Case("libstdc++", ARCXX_libstdcxx)
1393      .Case("none", ARCXX_nolib)
1394      .Default(~0U);
1395    if (Library == ~0U)
1396      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1397    else
1398      Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
1399  }
1400}
1401
1402static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1403                                        ArgList &Args) {
1404  using namespace options;
1405  Opts.ShowCPP = !Args.hasArg(OPT_dM);
1406  Opts.ShowComments = Args.hasArg(OPT_C);
1407  Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1408  Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1409  Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1410  Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
1411}
1412
1413static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1414  using namespace options;
1415  Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1416  Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
1417  Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1418  Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
1419  Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1420  Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1421
1422  // Use the default target triple if unspecified.
1423  if (Opts.Triple.empty())
1424    Opts.Triple = llvm::sys::getDefaultTargetTriple();
1425}
1426
1427//
1428
1429bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1430                                        const char *const *ArgBegin,
1431                                        const char *const *ArgEnd,
1432                                        DiagnosticsEngine &Diags) {
1433  bool Success = true;
1434
1435  // Parse the arguments.
1436  OwningPtr<OptTable> Opts(createDriverOptTable());
1437  unsigned MissingArgIndex, MissingArgCount;
1438  OwningPtr<InputArgList> Args(
1439    Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1440
1441  // Check for missing argument error.
1442  if (MissingArgCount) {
1443    Diags.Report(diag::err_drv_missing_argument)
1444      << Args->getArgString(MissingArgIndex) << MissingArgCount;
1445    Success = false;
1446  }
1447
1448  // Issue errors on unknown arguments.
1449  for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1450         ie = Args->filtered_end(); it != ie; ++it) {
1451    Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
1452    Success = false;
1453  }
1454
1455  // Issue errors on arguments that are not valid for CC1.
1456  for (ArgList::iterator I = Args->begin(), E = Args->end();
1457       I != E; ++I) {
1458    if (!(*I)->getOption().hasFlag(options::CC1Option)) {
1459      Diags.Report(diag::err_drv_unknown_argument) << (*I)->getAsString(*Args);
1460      Success = false;
1461    }
1462  }
1463
1464  Success = ParseAnalyzerArgs(*Res.getAnalyzerOpts(), *Args, Diags) && Success;
1465  Success = ParseMigratorArgs(Res.getMigratorOpts(), *Args) && Success;
1466  ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1467  Success = ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, &Diags)
1468            && Success;
1469  ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
1470  // FIXME: We shouldn't have to pass the DashX option around here
1471  InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1472  Success = ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags)
1473            && Success;
1474  ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1475  if (DashX != IK_AST && DashX != IK_LLVM_IR) {
1476    ParseLangArgs(*Res.getLangOpts(), *Args, DashX, Diags);
1477    if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
1478      Res.getLangOpts()->ObjCExceptions = 1;
1479  }
1480  // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
1481  // PCH file and find the original header name. Remove the need to do that in
1482  // ParsePreprocessorArgs and remove the FileManager
1483  // parameters from the function and the "FileManager.h" #include.
1484  FileManager FileMgr(Res.getFileSystemOpts());
1485  ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
1486  ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
1487  ParseTargetArgs(Res.getTargetOpts(), *Args);
1488
1489  return Success;
1490}
1491
1492namespace {
1493
1494  class ModuleSignature {
1495    llvm::SmallVector<uint64_t, 16> Data;
1496    unsigned CurBit;
1497    uint64_t CurValue;
1498
1499  public:
1500    ModuleSignature() : CurBit(0), CurValue(0) { }
1501
1502    void add(uint64_t Value, unsigned Bits);
1503    void add(StringRef Value);
1504    void flush();
1505
1506    llvm::APInt getAsInteger() const;
1507  };
1508}
1509
1510void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
1511  CurValue |= Value << CurBit;
1512  if (CurBit + NumBits < 64) {
1513    CurBit += NumBits;
1514    return;
1515  }
1516
1517  // Add the current word.
1518  Data.push_back(CurValue);
1519
1520  if (CurBit)
1521    CurValue = Value >> (64-CurBit);
1522  else
1523    CurValue = 0;
1524  CurBit = (CurBit+NumBits) & 63;
1525}
1526
1527void ModuleSignature::flush() {
1528  if (CurBit == 0)
1529    return;
1530
1531  Data.push_back(CurValue);
1532  CurBit = 0;
1533  CurValue = 0;
1534}
1535
1536void ModuleSignature::add(StringRef Value) {
1537  for (StringRef::iterator I = Value.begin(), IEnd = Value.end(); I != IEnd;++I)
1538    add(*I, 8);
1539}
1540
1541llvm::APInt ModuleSignature::getAsInteger() const {
1542  return llvm::APInt(Data.size() * 64, Data);
1543}
1544
1545std::string CompilerInvocation::getModuleHash() const {
1546  using llvm::hash_code;
1547  using llvm::hash_value;
1548  using llvm::hash_combine;
1549
1550  // Start the signature with the compiler version.
1551  // FIXME: We'd rather use something more cryptographically sound than
1552  // CityHash, but this will do for now.
1553  hash_code code = hash_value(getClangFullRepositoryVersion());
1554
1555  // Extend the signature with the language options
1556#define LANGOPT(Name, Bits, Default, Description) \
1557   code = hash_combine(code, LangOpts->Name);
1558#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
1559  code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
1560#define BENIGN_LANGOPT(Name, Bits, Default, Description)
1561#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
1562#include "clang/Basic/LangOptions.def"
1563
1564  // Extend the signature with the target options.
1565  code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
1566                      TargetOpts->ABI, TargetOpts->CXXABI,
1567                      TargetOpts->LinkerVersion);
1568  for (unsigned i = 0, n = TargetOpts->FeaturesAsWritten.size(); i != n; ++i)
1569    code = hash_combine(code, TargetOpts->FeaturesAsWritten[i]);
1570
1571  // Extend the signature with preprocessor options.
1572  const PreprocessorOptions &ppOpts = getPreprocessorOpts();
1573  code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
1574
1575  std::vector<StringRef> MacroDefs;
1576  for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
1577            I = getPreprocessorOpts().Macros.begin(),
1578         IEnd = getPreprocessorOpts().Macros.end();
1579       I != IEnd; ++I) {
1580    code = hash_combine(code, I->first, I->second);
1581  }
1582
1583  // Extend the signature with the sysroot.
1584  const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
1585  code = hash_combine(code, hsOpts.Sysroot, hsOpts.UseBuiltinIncludes,
1586                      hsOpts.UseStandardSystemIncludes,
1587                      hsOpts.UseStandardCXXIncludes,
1588                      hsOpts.UseLibcxx);
1589
1590  return llvm::APInt(64, code).toString(36, /*Signed=*/false);
1591}
1592