CompilerInvocation.cpp revision 360355db57d15ce3c90051b05cca993a4c5ee8db 
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/FileManager.h"
13#include "clang/Basic/Version.h"
14#include "clang/Driver/Arg.h"
15#include "clang/Driver/ArgList.h"
16#include "clang/Driver/DriverDiagnostic.h"
17#include "clang/Driver/OptTable.h"
18#include "clang/Driver/Option.h"
19#include "clang/Driver/Options.h"
20#include "clang/Frontend/LangStandard.h"
21#include "clang/Lex/HeaderSearchOptions.h"
22#include "clang/Serialization/ASTReader.h"
23#include "llvm/ADT/Hashing.h"
24#include "llvm/ADT/OwningPtr.h"
25#include "llvm/ADT/SmallVector.h"
26#include "llvm/ADT/StringExtras.h"
27#include "llvm/ADT/StringSwitch.h"
28#include "llvm/ADT/Triple.h"
29#include "llvm/Support/ErrorHandling.h"
30#include "llvm/Support/Host.h"
31#include "llvm/Support/Path.h"
32using namespace clang;
33
34//===----------------------------------------------------------------------===//
35// Initialization.
36//===----------------------------------------------------------------------===//
37
38CompilerInvocationBase::CompilerInvocationBase()
39  : LangOpts(new LangOptions()), TargetOpts(new TargetOptions()),
40    DiagnosticOpts(new DiagnosticOptions()),
41    HeaderSearchOpts(new HeaderSearchOptions()),
42    PreprocessorOpts(new PreprocessorOptions()) {}
43
44CompilerInvocationBase::CompilerInvocationBase(const CompilerInvocationBase &X)
45  : RefCountedBase<CompilerInvocation>(),
46    LangOpts(new LangOptions(*X.getLangOpts())),
47    TargetOpts(new TargetOptions(X.getTargetOpts())),
48    DiagnosticOpts(new DiagnosticOptions(X.getDiagnosticOpts())),
49    HeaderSearchOpts(new HeaderSearchOptions(X.getHeaderSearchOpts())),
50    PreprocessorOpts(new PreprocessorOptions(X.getPreprocessorOpts())) {}
51
52//===----------------------------------------------------------------------===//
53// Deserialization (from args)
54//===----------------------------------------------------------------------===//
55
56using namespace clang::driver;
57using namespace clang::driver::options;
58
59//
60
61static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
62                                     DiagnosticsEngine &Diags) {
63  unsigned DefaultOpt = 0;
64  if (IK == IK_OpenCL && !Args.hasArg(OPT_cl_opt_disable))
65    DefaultOpt = 2;
66
67  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
68    if (A->getOption().matches(options::OPT_O0))
69      return 0;
70
71    assert (A->getOption().matches(options::OPT_O));
72
73    StringRef S(A->getValue());
74    if (S == "s" || S == "z" || S.empty())
75      return 2;
76
77    return Args.getLastArgIntValue(OPT_O, DefaultOpt, Diags);
78  }
79
80  return DefaultOpt;
81}
82
83static unsigned getOptimizationLevelSize(ArgList &Args, InputKind IK,
84                                         DiagnosticsEngine &Diags) {
85  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
86    if (A->getOption().matches(options::OPT_O)) {
87      switch (A->getValue()[0]) {
88      default:
89        return 0;
90      case 's':
91        return 1;
92      case 'z':
93        return 2;
94      }
95    }
96  }
97  return 0;
98}
99
100static void addWarningArgs(ArgList &Args, std::vector<std::string> &Warnings) {
101  for (arg_iterator I = Args.filtered_begin(OPT_W_Group),
102         E = Args.filtered_end(); I != E; ++I) {
103    Arg *A = *I;
104    // If the argument is a pure flag, add its name (minus the "W" at the beginning)
105    // to the warning list. Else, add its value (for the OPT_W case).
106    if (A->getOption().getKind() == Option::FlagClass) {
107      Warnings.push_back(A->getOption().getName().substr(1));
108    } else {
109      for (unsigned Idx = 0, End = A->getNumValues();
110           Idx < End; ++Idx) {
111        StringRef V = A->getValue(Idx);
112        // "-Wl," and such are not warning options.
113        // FIXME: Should be handled by putting these in separate flags.
114        if (V.startswith("l,") || V.startswith("a,") || V.startswith("p,"))
115          continue;
116
117        Warnings.push_back(V);
118      }
119    }
120  }
121}
122
123static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
124                              DiagnosticsEngine &Diags) {
125  using namespace options;
126  bool Success = true;
127  if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
128    StringRef Name = A->getValue();
129    AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
130#define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
131      .Case(CMDFLAG, NAME##Model)
132#include "clang/StaticAnalyzer/Core/Analyses.def"
133      .Default(NumStores);
134    if (Value == NumStores) {
135      Diags.Report(diag::err_drv_invalid_value)
136        << A->getAsString(Args) << Name;
137      Success = false;
138    } else {
139      Opts.AnalysisStoreOpt = Value;
140    }
141  }
142
143  if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
144    StringRef Name = A->getValue();
145    AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
146#define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
147      .Case(CMDFLAG, NAME##Model)
148#include "clang/StaticAnalyzer/Core/Analyses.def"
149      .Default(NumConstraints);
150    if (Value == NumConstraints) {
151      Diags.Report(diag::err_drv_invalid_value)
152        << A->getAsString(Args) << Name;
153      Success = false;
154    } else {
155      Opts.AnalysisConstraintsOpt = Value;
156    }
157  }
158
159  if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
160    StringRef Name = A->getValue();
161    AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
162#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
163      .Case(CMDFLAG, PD_##NAME)
164#include "clang/StaticAnalyzer/Core/Analyses.def"
165      .Default(NUM_ANALYSIS_DIAG_CLIENTS);
166    if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
167      Diags.Report(diag::err_drv_invalid_value)
168        << A->getAsString(Args) << Name;
169      Success = false;
170    } else {
171      Opts.AnalysisDiagOpt = Value;
172    }
173  }
174
175  if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
176    StringRef Name = A->getValue();
177    AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
178#define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
179      .Case(CMDFLAG, NAME)
180#include "clang/StaticAnalyzer/Core/Analyses.def"
181      .Default(NumPurgeModes);
182    if (Value == NumPurgeModes) {
183      Diags.Report(diag::err_drv_invalid_value)
184        << A->getAsString(Args) << Name;
185      Success = false;
186    } else {
187      Opts.AnalysisPurgeOpt = Value;
188    }
189  }
190
191  if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
192    StringRef Name = A->getValue();
193    AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
194#define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
195      .Case(CMDFLAG, NAME)
196#include "clang/StaticAnalyzer/Core/Analyses.def"
197      .Default(NumInliningModes);
198    if (Value == NumInliningModes) {
199      Diags.Report(diag::err_drv_invalid_value)
200        << A->getAsString(Args) << Name;
201      Success = false;
202    } else {
203      Opts.InliningMode = Value;
204    }
205  }
206
207  Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
208  Opts.visualizeExplodedGraphWithGraphViz =
209    Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
210  Opts.visualizeExplodedGraphWithUbiGraph =
211    Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
212  Opts.NoRetryExhausted = Args.hasArg(OPT_analyzer_disable_retry_exhausted);
213  Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
214  Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
215  Opts.AnalyzeNestedBlocks =
216    Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
217  Opts.eagerlyAssumeBinOpBifurcation = Args.hasArg(OPT_analyzer_eagerly_assume);
218  Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
219  Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
220  Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
221  Opts.maxBlockVisitOnPath = Args.getLastArgIntValue(OPT_analyzer_max_loop, 4, Diags);
222  Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
223  Opts.InlineMaxStackDepth =
224    Args.getLastArgIntValue(OPT_analyzer_inline_max_stack_depth,
225                            Opts.InlineMaxStackDepth, Diags);
226
227  Opts.CheckersControlList.clear();
228  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_checker,
229                                             OPT_analyzer_disable_checker),
230         ie = Args.filtered_end(); it != ie; ++it) {
231    const Arg *A = *it;
232    A->claim();
233    bool enable = (A->getOption().getID() == OPT_analyzer_checker);
234    // We can have a list of comma separated checker names, e.g:
235    // '-analyzer-checker=cocoa,unix'
236    StringRef checkerList = A->getValue();
237    SmallVector<StringRef, 4> checkers;
238    checkerList.split(checkers, ",");
239    for (unsigned i = 0, e = checkers.size(); i != e; ++i)
240      Opts.CheckersControlList.push_back(std::make_pair(checkers[i], enable));
241  }
242
243  // Go through the analyzer configuration options.
244  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_config),
245       ie = Args.filtered_end(); it != ie; ++it) {
246    const Arg *A = *it;
247    A->claim();
248    // We can have a list of comma separated config names, e.g:
249    // '-analyzer-config key1=val1,key2=val2'
250    StringRef configList = A->getValue();
251    SmallVector<StringRef, 4> configVals;
252    configList.split(configVals, ",");
253    for (unsigned i = 0, e = configVals.size(); i != e; ++i) {
254      StringRef key, val;
255      llvm::tie(key, val) = configVals[i].split("=");
256      if (val.empty()) {
257        Diags.Report(SourceLocation(),
258                     diag::err_analyzer_config_no_value) << configVals[i];
259        Success = false;
260        break;
261      }
262      if (val.find('=') != StringRef::npos) {
263        Diags.Report(SourceLocation(),
264                     diag::err_analyzer_config_multiple_values)
265          << configVals[i];
266        Success = false;
267        break;
268      }
269      Opts.Config[key] = val;
270    }
271  }
272
273  return Success;
274}
275
276static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
277  Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
278  Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
279  return true;
280}
281
282static void ParseCommentArgs(CommentOptions &Opts, ArgList &Args) {
283  Opts.BlockCommandNames = Args.getAllArgValues(OPT_fcomment_block_commands);
284}
285
286static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
287                             DiagnosticsEngine &Diags) {
288  using namespace options;
289  bool Success = true;
290
291  unsigned OptLevel = getOptimizationLevel(Args, IK, Diags);
292  if (OptLevel > 3) {
293    Diags.Report(diag::err_drv_invalid_value)
294      << Args.getLastArg(OPT_O)->getAsString(Args) << OptLevel;
295    OptLevel = 3;
296    Success = false;
297  }
298  Opts.OptimizationLevel = OptLevel;
299
300  // We must always run at least the always inlining pass.
301  Opts.setInlining(
302    (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
303                                 : CodeGenOptions::OnlyAlwaysInlining);
304  // -fno-inline-functions overrides OptimizationLevel > 1.
305  Opts.NoInline = Args.hasArg(OPT_fno_inline);
306  Opts.setInlining(Args.hasArg(OPT_fno_inline_functions) ?
307                     CodeGenOptions::OnlyAlwaysInlining : Opts.getInlining());
308
309  if (Args.hasArg(OPT_gline_tables_only)) {
310    Opts.setDebugInfo(CodeGenOptions::DebugLineTablesOnly);
311  } else if (Args.hasArg(OPT_g_Flag)) {
312    if (Args.hasFlag(OPT_flimit_debug_info, OPT_fno_limit_debug_info, true))
313      Opts.setDebugInfo(CodeGenOptions::LimitedDebugInfo);
314    else
315      Opts.setDebugInfo(CodeGenOptions::FullDebugInfo);
316  }
317  Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
318  Opts.SplitDwarfFile = Args.getLastArgValue(OPT_split_dwarf_file);
319
320  Opts.ModulesAutolink = Args.hasArg(OPT_fmodules_autolink);
321  Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
322  Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
323  Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
324  Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
325    OPT_fuse_register_sized_bitfield_access);
326  Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
327  Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
328  Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
329  Opts.NoCommon = Args.hasArg(OPT_fno_common);
330  Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
331  Opts.OptimizeSize = getOptimizationLevelSize(Args, IK, Diags);
332  Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
333                            Args.hasArg(OPT_ffreestanding));
334  Opts.UnrollLoops = Args.hasArg(OPT_funroll_loops) ||
335                     (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
336
337  Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
338  Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
339  Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);
340  Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
341  Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
342  Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
343  Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
344  Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
345  Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
346  Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
347  Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
348  Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
349  Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
350  Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
351                       Args.hasArg(OPT_cl_finite_math_only)||
352                       Args.hasArg(OPT_cl_fast_relaxed_math));
353  Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
354                       Args.hasArg(OPT_cl_finite_math_only)||
355                       Args.hasArg(OPT_cl_fast_relaxed_math));
356  Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
357  Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
358  Opts.NumRegisterParameters = Args.getLastArgIntValue(OPT_mregparm, 0, Diags);
359  Opts.NoGlobalMerge = Args.hasArg(OPT_mno_global_merge);
360  Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
361  Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
362  Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
363  Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
364  Opts.NoDwarf2CFIAsm = Args.hasArg(OPT_fno_dwarf2_cfi_asm);
365  Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
366  Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
367  Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
368  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
369                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
370                      Args.hasArg(OPT_cl_fast_relaxed_math);
371  Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
372  Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
373  Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
374  Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
375
376  Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
377  Opts.DataSections = Args.hasArg(OPT_fdata_sections);
378
379  Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
380  Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
381  Opts.SanitizeRecover = !Args.hasArg(OPT_fno_sanitize_recover);
382
383  Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
384  Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
385  Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
386  Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
387  Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
388  Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
389  Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
390  Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
391  Opts.SanitizerBlacklistFile = Args.getLastArgValue(OPT_fsanitize_blacklist);
392  Opts.SanitizeMemoryTrackOrigins =
393    Args.hasArg(OPT_fsanitize_memory_track_origins);
394  Opts.SanitizeAddressZeroBaseShadow =
395    Args.hasArg(OPT_fsanitize_address_zero_base_shadow);
396  Opts.SanitizeUndefinedTrapOnError =
397    Args.hasArg(OPT_fsanitize_undefined_trap_on_error);
398  Opts.SSPBufferSize =
399    Args.getLastArgIntValue(OPT_stack_protector_buffer_size, 8, Diags);
400  Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
401  if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
402    StringRef Val = A->getValue();
403    unsigned StackAlignment = Opts.StackAlignment;
404    Val.getAsInteger(10, StackAlignment);
405    Opts.StackAlignment = StackAlignment;
406  }
407
408  if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
409    StringRef Name = A->getValue();
410    unsigned Method = llvm::StringSwitch<unsigned>(Name)
411      .Case("legacy", CodeGenOptions::Legacy)
412      .Case("non-legacy", CodeGenOptions::NonLegacy)
413      .Case("mixed", CodeGenOptions::Mixed)
414      .Default(~0U);
415    if (Method == ~0U) {
416      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
417      Success = false;
418    } else {
419      Opts.setObjCDispatchMethod(
420        static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
421    }
422  }
423
424  if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
425    StringRef Name = A->getValue();
426    unsigned Model = llvm::StringSwitch<unsigned>(Name)
427        .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
428        .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
429        .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
430        .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
431        .Default(~0U);
432    if (Model == ~0U) {
433      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
434      Success = false;
435    } else {
436      Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
437    }
438  }
439
440  if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
441    StringRef Val = A->getValue();
442    if (Val == "fast")
443      Opts.setFPContractMode(CodeGenOptions::FPC_Fast);
444    else if (Val == "on")
445      Opts.setFPContractMode(CodeGenOptions::FPC_On);
446    else if (Val == "off")
447      Opts.setFPContractMode(CodeGenOptions::FPC_Off);
448    else
449      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
450  }
451
452  return Success;
453}
454
455static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
456                                      ArgList &Args) {
457  using namespace options;
458  Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
459  Opts.Targets = Args.getAllArgValues(OPT_MT);
460  Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
461  Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
462  Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
463  Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
464  Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
465  Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
466}
467
468bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
469                                DiagnosticsEngine *Diags) {
470  using namespace options;
471  bool Success = true;
472
473  Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
474  Opts.DiagnosticSerializationFile =
475    Args.getLastArgValue(OPT_diagnostic_serialized_file);
476  Opts.IgnoreWarnings = Args.hasArg(OPT_w);
477  Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
478  Opts.Pedantic = Args.hasArg(OPT_pedantic);
479  Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
480  Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
481  Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
482  Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
483                                 OPT_fno_show_column,
484                                 /*Default=*/true);
485  Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
486  Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
487  Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
488
489  // Default behavior is to not to show note include stacks.
490  Opts.ShowNoteIncludeStack = false;
491  if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
492                               OPT_fno_diagnostics_show_note_include_stack))
493    if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
494      Opts.ShowNoteIncludeStack = true;
495
496  StringRef ShowOverloads =
497    Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
498  if (ShowOverloads == "best")
499    Opts.setShowOverloads(Ovl_Best);
500  else if (ShowOverloads == "all")
501    Opts.setShowOverloads(Ovl_All);
502  else {
503    Success = false;
504    if (Diags)
505      Diags->Report(diag::err_drv_invalid_value)
506      << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
507      << ShowOverloads;
508  }
509
510  StringRef ShowCategory =
511    Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
512  if (ShowCategory == "none")
513    Opts.ShowCategories = 0;
514  else if (ShowCategory == "id")
515    Opts.ShowCategories = 1;
516  else if (ShowCategory == "name")
517    Opts.ShowCategories = 2;
518  else {
519    Success = false;
520    if (Diags)
521      Diags->Report(diag::err_drv_invalid_value)
522      << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
523      << ShowCategory;
524  }
525
526  StringRef Format =
527    Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
528  if (Format == "clang")
529    Opts.setFormat(DiagnosticOptions::Clang);
530  else if (Format == "msvc")
531    Opts.setFormat(DiagnosticOptions::Msvc);
532  else if (Format == "vi")
533    Opts.setFormat(DiagnosticOptions::Vi);
534  else {
535    Success = false;
536    if (Diags)
537      Diags->Report(diag::err_drv_invalid_value)
538      << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
539      << Format;
540  }
541
542  Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
543  Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
544  Opts.ShowPresumedLoc = !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
545  Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
546  Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
547  Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
548  Opts.ErrorLimit = Args.getLastArgIntValue(OPT_ferror_limit, 0, Diags);
549  Opts.MacroBacktraceLimit
550    = Args.getLastArgIntValue(OPT_fmacro_backtrace_limit,
551                         DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
552  Opts.TemplateBacktraceLimit
553    = Args.getLastArgIntValue(OPT_ftemplate_backtrace_limit,
554                         DiagnosticOptions::DefaultTemplateBacktraceLimit,
555                         Diags);
556  Opts.ConstexprBacktraceLimit
557    = Args.getLastArgIntValue(OPT_fconstexpr_backtrace_limit,
558                         DiagnosticOptions::DefaultConstexprBacktraceLimit,
559                         Diags);
560  Opts.TabStop = Args.getLastArgIntValue(OPT_ftabstop,
561                                    DiagnosticOptions::DefaultTabStop, Diags);
562  if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
563    Opts.TabStop = DiagnosticOptions::DefaultTabStop;
564    if (Diags)
565      Diags->Report(diag::warn_ignoring_ftabstop_value)
566      << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
567  }
568  Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
569  addWarningArgs(Args, Opts.Warnings);
570
571  return Success;
572}
573
574static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
575  Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
576}
577
578static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
579                                   DiagnosticsEngine &Diags) {
580  using namespace options;
581  Opts.ProgramAction = frontend::ParseSyntaxOnly;
582  if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
583    switch (A->getOption().getID()) {
584    default:
585      llvm_unreachable("Invalid option in group!");
586    case OPT_ast_list:
587      Opts.ProgramAction = frontend::ASTDeclList; break;
588    case OPT_ast_dump:
589      Opts.ProgramAction = frontend::ASTDump; break;
590    case OPT_ast_dump_xml:
591      Opts.ProgramAction = frontend::ASTDumpXML; break;
592    case OPT_ast_print:
593      Opts.ProgramAction = frontend::ASTPrint; break;
594    case OPT_ast_view:
595      Opts.ProgramAction = frontend::ASTView; break;
596    case OPT_dump_raw_tokens:
597      Opts.ProgramAction = frontend::DumpRawTokens; break;
598    case OPT_dump_tokens:
599      Opts.ProgramAction = frontend::DumpTokens; break;
600    case OPT_S:
601      Opts.ProgramAction = frontend::EmitAssembly; break;
602    case OPT_emit_llvm_bc:
603      Opts.ProgramAction = frontend::EmitBC; break;
604    case OPT_emit_html:
605      Opts.ProgramAction = frontend::EmitHTML; break;
606    case OPT_emit_llvm:
607      Opts.ProgramAction = frontend::EmitLLVM; break;
608    case OPT_emit_llvm_only:
609      Opts.ProgramAction = frontend::EmitLLVMOnly; break;
610    case OPT_emit_codegen_only:
611      Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
612    case OPT_emit_obj:
613      Opts.ProgramAction = frontend::EmitObj; break;
614    case OPT_fixit_EQ:
615      Opts.FixItSuffix = A->getValue();
616      // fall-through!
617    case OPT_fixit:
618      Opts.ProgramAction = frontend::FixIt; break;
619    case OPT_emit_module:
620      Opts.ProgramAction = frontend::GenerateModule; break;
621    case OPT_emit_pch:
622      Opts.ProgramAction = frontend::GeneratePCH; break;
623    case OPT_emit_pth:
624      Opts.ProgramAction = frontend::GeneratePTH; break;
625    case OPT_init_only:
626      Opts.ProgramAction = frontend::InitOnly; break;
627    case OPT_fsyntax_only:
628      Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
629    case OPT_print_decl_contexts:
630      Opts.ProgramAction = frontend::PrintDeclContext; break;
631    case OPT_print_preamble:
632      Opts.ProgramAction = frontend::PrintPreamble; break;
633    case OPT_E:
634      Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
635    case OPT_rewrite_macros:
636      Opts.ProgramAction = frontend::RewriteMacros; break;
637    case OPT_rewrite_objc:
638      Opts.ProgramAction = frontend::RewriteObjC; break;
639    case OPT_rewrite_test:
640      Opts.ProgramAction = frontend::RewriteTest; break;
641    case OPT_analyze:
642      Opts.ProgramAction = frontend::RunAnalysis; break;
643    case OPT_migrate:
644      Opts.ProgramAction = frontend::MigrateSource; break;
645    case OPT_Eonly:
646      Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
647    }
648  }
649
650  if (const Arg* A = Args.getLastArg(OPT_plugin)) {
651    Opts.Plugins.push_back(A->getValue(0));
652    Opts.ProgramAction = frontend::PluginAction;
653    Opts.ActionName = A->getValue();
654
655    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
656           end = Args.filtered_end(); it != end; ++it) {
657      if ((*it)->getValue(0) == Opts.ActionName)
658        Opts.PluginArgs.push_back((*it)->getValue(1));
659    }
660  }
661
662  Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
663  Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
664  for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
665    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
666           end = Args.filtered_end(); it != end; ++it) {
667      if ((*it)->getValue(0) == Opts.AddPluginActions[i])
668        Opts.AddPluginArgs[i].push_back((*it)->getValue(1));
669    }
670  }
671
672  if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
673    Opts.CodeCompletionAt =
674      ParsedSourceLocation::FromString(A->getValue());
675    if (Opts.CodeCompletionAt.FileName.empty())
676      Diags.Report(diag::err_drv_invalid_value)
677        << A->getAsString(Args) << A->getValue();
678  }
679  Opts.DisableFree = Args.hasArg(OPT_disable_free);
680
681  Opts.OutputFile = Args.getLastArgValue(OPT_o);
682  Opts.Plugins = Args.getAllArgValues(OPT_load);
683  Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
684  Opts.ShowHelp = Args.hasArg(OPT_help);
685  Opts.ShowStats = Args.hasArg(OPT_print_stats);
686  Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
687  Opts.ShowVersion = Args.hasArg(OPT_version);
688  Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
689  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
690  Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
691  Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
692  Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
693  Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
694  Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
695  Opts.UseGlobalModuleIndex = !Args.hasArg(OPT_fno_modules_global_index);
696  Opts.GenerateGlobalModuleIndex = Opts.UseGlobalModuleIndex;
697
698  Opts.CodeCompleteOpts.IncludeMacros
699    = Args.hasArg(OPT_code_completion_macros);
700  Opts.CodeCompleteOpts.IncludeCodePatterns
701    = Args.hasArg(OPT_code_completion_patterns);
702  Opts.CodeCompleteOpts.IncludeGlobals
703    = !Args.hasArg(OPT_no_code_completion_globals);
704  Opts.CodeCompleteOpts.IncludeBriefComments
705    = Args.hasArg(OPT_code_completion_brief_comments);
706
707  Opts.OverrideRecordLayoutsFile
708    = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
709  if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
710                                     OPT_arcmt_modify,
711                                     OPT_arcmt_migrate)) {
712    switch (A->getOption().getID()) {
713    default:
714      llvm_unreachable("missed a case");
715    case OPT_arcmt_check:
716      Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
717      break;
718    case OPT_arcmt_modify:
719      Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
720      break;
721    case OPT_arcmt_migrate:
722      Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
723      break;
724    }
725  }
726  Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
727  Opts.ARCMTMigrateReportOut
728    = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
729  Opts.ARCMTMigrateEmitARCErrors
730    = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
731
732  if (Args.hasArg(OPT_objcmt_migrate_literals))
733    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
734  if (Args.hasArg(OPT_objcmt_migrate_subscripting))
735    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
736
737  if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
738      Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
739    Diags.Report(diag::err_drv_argument_not_allowed_with)
740      << "ARC migration" << "ObjC migration";
741  }
742
743  InputKind DashX = IK_None;
744  if (const Arg *A = Args.getLastArg(OPT_x)) {
745    DashX = llvm::StringSwitch<InputKind>(A->getValue())
746      .Case("c", IK_C)
747      .Case("cl", IK_OpenCL)
748      .Case("cuda", IK_CUDA)
749      .Case("c++", IK_CXX)
750      .Case("objective-c", IK_ObjC)
751      .Case("objective-c++", IK_ObjCXX)
752      .Case("cpp-output", IK_PreprocessedC)
753      .Case("assembler-with-cpp", IK_Asm)
754      .Case("c++-cpp-output", IK_PreprocessedCXX)
755      .Case("objective-c-cpp-output", IK_PreprocessedObjC)
756      .Case("objc-cpp-output", IK_PreprocessedObjC)
757      .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
758      .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
759      .Case("c-header", IK_C)
760      .Case("cl-header", IK_OpenCL)
761      .Case("objective-c-header", IK_ObjC)
762      .Case("c++-header", IK_CXX)
763      .Case("objective-c++-header", IK_ObjCXX)
764      .Case("ast", IK_AST)
765      .Case("ir", IK_LLVM_IR)
766      .Default(IK_None);
767    if (DashX == IK_None)
768      Diags.Report(diag::err_drv_invalid_value)
769        << A->getAsString(Args) << A->getValue();
770  }
771
772  // '-' is the default input if none is given.
773  std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
774  Opts.Inputs.clear();
775  if (Inputs.empty())
776    Inputs.push_back("-");
777  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
778    InputKind IK = DashX;
779    if (IK == IK_None) {
780      IK = FrontendOptions::getInputKindForExtension(
781        StringRef(Inputs[i]).rsplit('.').second);
782      // FIXME: Remove this hack.
783      if (i == 0)
784        DashX = IK;
785    }
786    Opts.Inputs.push_back(FrontendInputFile(Inputs[i], IK));
787  }
788
789  return DashX;
790}
791
792std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
793                                                 void *MainAddr) {
794  llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
795
796  if (!P.isEmpty()) {
797    P.eraseComponent();  // Remove /clang from foo/bin/clang
798    P.eraseComponent();  // Remove /bin   from foo/bin
799
800    // Get foo/lib/clang/<version>/include
801    P.appendComponent("lib");
802    P.appendComponent("clang");
803    P.appendComponent(CLANG_VERSION_STRING);
804  }
805
806  return P.str();
807}
808
809static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
810  using namespace options;
811  Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
812  Opts.Verbose = Args.hasArg(OPT_v);
813  Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
814  Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
815  Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
816  if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
817    Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
818  Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
819  Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodules_cache_path);
820  Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
821
822  for (arg_iterator it = Args.filtered_begin(OPT_fmodules_ignore_macro),
823       ie = Args.filtered_end(); it != ie; ++it) {
824    StringRef MacroDef = (*it)->getValue();
825    Opts.ModulesIgnoreMacros.insert(MacroDef.split('=').first);
826  }
827
828  // Add -I..., -F..., and -index-header-map options in order.
829  bool IsIndexHeaderMap = false;
830  for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F,
831                                             OPT_index_header_map),
832       ie = Args.filtered_end(); it != ie; ++it) {
833    if ((*it)->getOption().matches(OPT_index_header_map)) {
834      // -index-header-map applies to the next -I or -F.
835      IsIndexHeaderMap = true;
836      continue;
837    }
838
839    frontend::IncludeDirGroup Group
840      = IsIndexHeaderMap? frontend::IndexHeaderMap : frontend::Angled;
841
842    Opts.AddPath((*it)->getValue(), Group,
843                 /*IsFramework=*/ (*it)->getOption().matches(OPT_F), true);
844    IsIndexHeaderMap = false;
845  }
846
847  // Add -iprefix/-iwithprefix/-iwithprefixbefore options.
848  StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
849  for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
850                                             OPT_iwithprefixbefore),
851         ie = Args.filtered_end(); it != ie; ++it) {
852    const Arg *A = *it;
853    if (A->getOption().matches(OPT_iprefix))
854      Prefix = A->getValue();
855    else if (A->getOption().matches(OPT_iwithprefix))
856      Opts.AddPath(Prefix.str() + A->getValue(),
857                   frontend::After, false, true);
858    else
859      Opts.AddPath(Prefix.str() + A->getValue(),
860                   frontend::Angled, false, true);
861  }
862
863  for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
864         ie = Args.filtered_end(); it != ie; ++it)
865    Opts.AddPath((*it)->getValue(), frontend::After, false, true);
866  for (arg_iterator it = Args.filtered_begin(OPT_iquote),
867         ie = Args.filtered_end(); it != ie; ++it)
868    Opts.AddPath((*it)->getValue(), frontend::Quoted, false, true);
869  for (arg_iterator it = Args.filtered_begin(OPT_isystem,
870         OPT_iwithsysroot), ie = Args.filtered_end(); it != ie; ++it)
871    Opts.AddPath((*it)->getValue(), frontend::System, false,
872                 !(*it)->getOption().matches(OPT_iwithsysroot));
873  for (arg_iterator it = Args.filtered_begin(OPT_iframework),
874         ie = Args.filtered_end(); it != ie; ++it)
875    Opts.AddPath((*it)->getValue(), frontend::System, true, true);
876
877  // Add the paths for the various language specific isystem flags.
878  for (arg_iterator it = Args.filtered_begin(OPT_c_isystem),
879       ie = Args.filtered_end(); it != ie; ++it)
880    Opts.AddPath((*it)->getValue(), frontend::CSystem, false, true);
881  for (arg_iterator it = Args.filtered_begin(OPT_cxx_isystem),
882       ie = Args.filtered_end(); it != ie; ++it)
883    Opts.AddPath((*it)->getValue(), frontend::CXXSystem, false, true);
884  for (arg_iterator it = Args.filtered_begin(OPT_objc_isystem),
885       ie = Args.filtered_end(); it != ie; ++it)
886    Opts.AddPath((*it)->getValue(), frontend::ObjCSystem, false,true);
887  for (arg_iterator it = Args.filtered_begin(OPT_objcxx_isystem),
888       ie = Args.filtered_end(); it != ie; ++it)
889    Opts.AddPath((*it)->getValue(), frontend::ObjCXXSystem, false, true);
890
891  // Add the internal paths from a driver that detects standard include paths.
892  for (arg_iterator I = Args.filtered_begin(OPT_internal_isystem,
893                                            OPT_internal_externc_isystem),
894                    E = Args.filtered_end();
895       I != E; ++I) {
896    frontend::IncludeDirGroup Group = frontend::System;
897    if ((*I)->getOption().matches(OPT_internal_externc_isystem))
898      Group = frontend::ExternCSystem;
899    Opts.AddPath((*I)->getValue(), Group, false, true);
900  }
901
902  // Add the path prefixes which are implicitly treated as being system headers.
903  for (arg_iterator I = Args.filtered_begin(OPT_isystem_prefix,
904                                            OPT_ino_system_prefix),
905                    E = Args.filtered_end();
906       I != E; ++I)
907    Opts.AddSystemHeaderPrefix((*I)->getValue(),
908                               (*I)->getOption().matches(OPT_isystem_prefix));
909}
910
911void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
912                                         LangStandard::Kind LangStd) {
913  // Set some properties which depend solely on the input kind; it would be nice
914  // to move these to the language standard, and have the driver resolve the
915  // input kind + language standard.
916  if (IK == IK_Asm) {
917    Opts.AsmPreprocessor = 1;
918  } else if (IK == IK_ObjC ||
919             IK == IK_ObjCXX ||
920             IK == IK_PreprocessedObjC ||
921             IK == IK_PreprocessedObjCXX) {
922    Opts.ObjC1 = Opts.ObjC2 = 1;
923  }
924
925  if (LangStd == LangStandard::lang_unspecified) {
926    // Based on the base language, pick one.
927    switch (IK) {
928    case IK_None:
929    case IK_AST:
930    case IK_LLVM_IR:
931      llvm_unreachable("Invalid input kind!");
932    case IK_OpenCL:
933      LangStd = LangStandard::lang_opencl;
934      break;
935    case IK_CUDA:
936      LangStd = LangStandard::lang_cuda;
937      break;
938    case IK_Asm:
939    case IK_C:
940    case IK_PreprocessedC:
941    case IK_ObjC:
942    case IK_PreprocessedObjC:
943      LangStd = LangStandard::lang_gnu99;
944      break;
945    case IK_CXX:
946    case IK_PreprocessedCXX:
947    case IK_ObjCXX:
948    case IK_PreprocessedObjCXX:
949      LangStd = LangStandard::lang_gnucxx98;
950      break;
951    }
952  }
953
954  const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
955  Opts.LineComment = Std.hasLineComments();
956  Opts.C99 = Std.isC99();
957  Opts.C11 = Std.isC11();
958  Opts.CPlusPlus = Std.isCPlusPlus();
959  Opts.CPlusPlus11 = Std.isCPlusPlus11();
960  Opts.CPlusPlus1y = Std.isCPlusPlus1y();
961  Opts.Digraphs = Std.hasDigraphs();
962  Opts.GNUMode = Std.isGNUMode();
963  Opts.GNUInline = !Std.isC99();
964  Opts.HexFloats = Std.hasHexFloats();
965  Opts.ImplicitInt = Std.hasImplicitInt();
966
967  // Set OpenCL Version.
968  if (LangStd == LangStandard::lang_opencl) {
969    Opts.OpenCL = 1;
970    Opts.OpenCLVersion = 100;
971  }
972  else if (LangStd == LangStandard::lang_opencl11) {
973      Opts.OpenCL = 1;
974      Opts.OpenCLVersion = 110;
975  }
976  else if (LangStd == LangStandard::lang_opencl12) {
977    Opts.OpenCL = 1;
978    Opts.OpenCLVersion = 120;
979  }
980
981  // OpenCL has some additional defaults.
982  if (Opts.OpenCL) {
983    Opts.AltiVec = 0;
984    Opts.CXXOperatorNames = 1;
985    Opts.LaxVectorConversions = 0;
986    Opts.DefaultFPContract = 1;
987    Opts.NativeHalfType = 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
1009/// Attempt to parse a visibility value out of the given argument.
1010static Visibility parseVisibility(Arg *arg, ArgList &args,
1011                                  DiagnosticsEngine &diags) {
1012  StringRef value = arg->getValue();
1013  if (value == "default") {
1014    return DefaultVisibility;
1015  } else if (value == "hidden") {
1016    return HiddenVisibility;
1017  } else if (value == "protected") {
1018    // FIXME: diagnose if target does not support protected visibility
1019    return ProtectedVisibility;
1020  }
1021
1022  diags.Report(diag::err_drv_invalid_value)
1023    << arg->getAsString(args) << value;
1024  return DefaultVisibility;
1025}
1026
1027static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1028                          DiagnosticsEngine &Diags) {
1029  // FIXME: Cleanup per-file based stuff.
1030  LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1031  if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1032    LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1033#define LANGSTANDARD(id, name, desc, features) \
1034      .Case(name, LangStandard::lang_##id)
1035#include "clang/Frontend/LangStandards.def"
1036      .Default(LangStandard::lang_unspecified);
1037    if (LangStd == LangStandard::lang_unspecified)
1038      Diags.Report(diag::err_drv_invalid_value)
1039        << A->getAsString(Args) << A->getValue();
1040    else {
1041      // Valid standard, check to make sure language and standard are compatable.
1042      const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1043      switch (IK) {
1044      case IK_C:
1045      case IK_ObjC:
1046      case IK_PreprocessedC:
1047      case IK_PreprocessedObjC:
1048        if (!(Std.isC89() || Std.isC99()))
1049          Diags.Report(diag::err_drv_argument_not_allowed_with)
1050            << A->getAsString(Args) << "C/ObjC";
1051        break;
1052      case IK_CXX:
1053      case IK_ObjCXX:
1054      case IK_PreprocessedCXX:
1055      case IK_PreprocessedObjCXX:
1056        if (!Std.isCPlusPlus())
1057          Diags.Report(diag::err_drv_argument_not_allowed_with)
1058            << A->getAsString(Args) << "C++/ObjC++";
1059        break;
1060      case IK_OpenCL:
1061        if (!Std.isC99())
1062          Diags.Report(diag::err_drv_argument_not_allowed_with)
1063            << A->getAsString(Args) << "OpenCL";
1064        break;
1065      case IK_CUDA:
1066        if (!Std.isCPlusPlus())
1067          Diags.Report(diag::err_drv_argument_not_allowed_with)
1068            << A->getAsString(Args) << "CUDA";
1069        break;
1070      default:
1071        break;
1072      }
1073    }
1074  }
1075
1076  // -cl-std only applies for OpenCL language standards.
1077  // Override the -std option in this case.
1078  if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1079    LangStandard::Kind OpenCLLangStd
1080    = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1081    .Case("CL", LangStandard::lang_opencl)
1082    .Case("CL1.1", LangStandard::lang_opencl11)
1083    .Case("CL1.2", LangStandard::lang_opencl12)
1084    .Default(LangStandard::lang_unspecified);
1085
1086    if (OpenCLLangStd == LangStandard::lang_unspecified) {
1087      Diags.Report(diag::err_drv_invalid_value)
1088      << A->getAsString(Args) << A->getValue();
1089    }
1090    else
1091      LangStd = OpenCLLangStd;
1092  }
1093
1094  CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1095
1096  // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1097  // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1098  // while a subset (the non-C++ GNU keywords) is provided by GCC's
1099  // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1100  // name, as it doesn't seem a useful distinction.
1101  Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1102                                  Opts.GNUKeywords);
1103
1104  if (Args.hasArg(OPT_fno_operator_names))
1105    Opts.CXXOperatorNames = 0;
1106
1107  if (Opts.ObjC1) {
1108    if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1109      StringRef value = arg->getValue();
1110      if (Opts.ObjCRuntime.tryParse(value))
1111        Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1112    }
1113
1114    if (Args.hasArg(OPT_fobjc_gc_only))
1115      Opts.setGC(LangOptions::GCOnly);
1116    else if (Args.hasArg(OPT_fobjc_gc))
1117      Opts.setGC(LangOptions::HybridGC);
1118    else if (Args.hasArg(OPT_fobjc_arc)) {
1119      Opts.ObjCAutoRefCount = 1;
1120      if (!Opts.ObjCRuntime.allowsARC())
1121        Diags.Report(diag::err_arc_unsupported_on_runtime);
1122
1123      // Only set ObjCARCWeak if ARC is enabled.
1124      if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1125        Opts.ObjCARCWeak = 1;
1126      else
1127        Opts.ObjCARCWeak = Opts.ObjCRuntime.allowsWeak();
1128    }
1129
1130    if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1131      Opts.ObjCInferRelatedResultType = 0;
1132  }
1133
1134  if (Args.hasArg(OPT_fgnu89_inline))
1135    Opts.GNUInline = 1;
1136
1137  if (Args.hasArg(OPT_fapple_kext)) {
1138    if (!Opts.CPlusPlus)
1139      Diags.Report(diag::warn_c_kext);
1140    else
1141      Opts.AppleKext = 1;
1142  }
1143
1144  if (Args.hasArg(OPT_print_ivar_layout))
1145    Opts.ObjCGCBitmapPrint = 1;
1146  if (Args.hasArg(OPT_fno_constant_cfstrings))
1147    Opts.NoConstantCFStrings = 1;
1148
1149  if (Args.hasArg(OPT_faltivec))
1150    Opts.AltiVec = 1;
1151
1152  if (Args.hasArg(OPT_pthread))
1153    Opts.POSIXThreads = 1;
1154
1155  if (Args.hasArg(OPT_fdelayed_template_parsing))
1156    Opts.DelayedTemplateParsing = 1;
1157
1158  // The value-visibility mode defaults to "default".
1159  if (Arg *visOpt = Args.getLastArg(OPT_fvisibility)) {
1160    Opts.setValueVisibilityMode(parseVisibility(visOpt, Args, Diags));
1161  } else {
1162    Opts.setValueVisibilityMode(DefaultVisibility);
1163  }
1164
1165  // The type-visibility mode defaults to the value-visibility mode.
1166  if (Arg *typeVisOpt = Args.getLastArg(OPT_ftype_visibility)) {
1167    Opts.setTypeVisibilityMode(parseVisibility(typeVisOpt, Args, Diags));
1168  } else {
1169    Opts.setTypeVisibilityMode(Opts.getValueVisibilityMode());
1170  }
1171
1172  if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1173    Opts.InlineVisibilityHidden = 1;
1174
1175  if (Args.hasArg(OPT_ftrapv)) {
1176    Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1177    // Set the handler, if one is specified.
1178    Opts.OverflowHandler =
1179        Args.getLastArgValue(OPT_ftrapv_handler);
1180  }
1181  else if (Args.hasArg(OPT_fwrapv))
1182    Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1183
1184  if (Args.hasArg(OPT_trigraphs))
1185    Opts.Trigraphs = 1;
1186
1187  Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1188                                   OPT_fno_dollars_in_identifiers,
1189                                   Opts.DollarIdents);
1190  Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1191  Opts.MicrosoftExt
1192    = Args.hasArg(OPT_fms_extensions) || Args.hasArg(OPT_fms_compatibility);
1193  Opts.MicrosoftMode = Args.hasArg(OPT_fms_compatibility);
1194  Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
1195  Opts.MSCVersion = Args.getLastArgIntValue(OPT_fmsc_version, 0, Diags);
1196  Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1197  Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1198  Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
1199                                   Opts.ConstStrings);
1200  if (Args.hasArg(OPT_fno_lax_vector_conversions))
1201    Opts.LaxVectorConversions = 0;
1202  if (Args.hasArg(OPT_fno_threadsafe_statics))
1203    Opts.ThreadsafeStatics = 0;
1204  Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1205  Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
1206  Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
1207  Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1208  Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
1209
1210  Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1211  Opts.Blocks = Args.hasArg(OPT_fblocks);
1212  Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
1213  Opts.Modules = Args.hasArg(OPT_fmodules);
1214  Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1215  Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
1216  Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1217  Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1218  Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1219  Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1220  Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1221  Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1222  Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1223  Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1224  Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1225  Opts.InstantiationDepth = Args.getLastArgIntValue(OPT_ftemplate_depth, 512,
1226                                                    Diags);
1227  Opts.ConstexprCallDepth = Args.getLastArgIntValue(OPT_fconstexpr_depth, 512,
1228                                                    Diags);
1229  Opts.BracketDepth = Args.getLastArgIntValue(OPT_fbracket_depth, 256, Diags);
1230  Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
1231  Opts.NumLargeByValueCopy = Args.getLastArgIntValue(OPT_Wlarge_by_value_copy_EQ,
1232                                                    0, Diags);
1233  Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
1234  Opts.ObjCConstantStringClass =
1235    Args.getLastArgValue(OPT_fconstant_string_class);
1236  Opts.ObjCDefaultSynthProperties =
1237    Args.hasArg(OPT_fobjc_default_synthesize_properties);
1238  Opts.EncodeExtendedBlockSig =
1239    Args.hasArg(OPT_fencode_extended_block_signature);
1240  Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1241  Opts.PackStruct = Args.getLastArgIntValue(OPT_fpack_struct_EQ, 0, Diags);
1242  Opts.PICLevel = Args.getLastArgIntValue(OPT_pic_level, 0, Diags);
1243  Opts.PIELevel = Args.getLastArgIntValue(OPT_pie_level, 0, Diags);
1244  Opts.Static = Args.hasArg(OPT_static_define);
1245  Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
1246  Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
1247                        || Args.hasArg(OPT_fdump_record_layouts);
1248  Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1249  Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1250  Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1251  Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
1252  Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
1253  Opts.MRTD = Args.hasArg(OPT_mrtd);
1254  Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
1255  Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
1256  Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
1257  Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
1258  Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
1259  Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
1260  Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
1261  Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
1262
1263  // Check if -fopenmp is specified.
1264  Opts.OpenMP = Args.hasArg(OPT_fopenmp);
1265
1266  // Record whether the __DEPRECATED define was requested.
1267  Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
1268                                 OPT_fno_deprecated_macro,
1269                                 Opts.Deprecated);
1270
1271  // FIXME: Eliminate this dependency.
1272  unsigned Opt = getOptimizationLevel(Args, IK, Diags),
1273       OptSize = getOptimizationLevelSize(Args, IK, Diags);
1274  Opts.Optimize = Opt != 0;
1275  Opts.OptimizeSize = OptSize != 0;
1276
1277  // This is the __NO_INLINE__ define, which just depends on things like the
1278  // optimization level and -fno-inline, not actually whether the backend has
1279  // inlining enabled.
1280  Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
1281
1282  Opts.FastMath = Args.hasArg(OPT_ffast_math);
1283  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only);
1284
1285  Opts.RetainCommentsFromSystemHeaders =
1286      Args.hasArg(OPT_fretain_comments_from_system_headers);
1287
1288  unsigned SSP = Args.getLastArgIntValue(OPT_stack_protector, 0, Diags);
1289  switch (SSP) {
1290  default:
1291    Diags.Report(diag::err_drv_invalid_value)
1292      << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1293    break;
1294  case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
1295  case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
1296  case 2: Opts.setStackProtector(LangOptions::SSPReq); break;
1297  }
1298
1299  // Parse -fsanitize= arguments.
1300  std::vector<std::string> Sanitizers = Args.getAllArgValues(OPT_fsanitize_EQ);
1301  for (unsigned I = 0, N = Sanitizers.size(); I != N; ++I) {
1302    // Since the Opts.Sanitize* values are bitfields, it's a little tricky to
1303    // efficiently map string values to them. Perform the mapping indirectly:
1304    // convert strings to enumerated values, then switch over the enum to set
1305    // the right bitfield value.
1306    enum Sanitizer {
1307#define SANITIZER(NAME, ID) \
1308      ID,
1309#include "clang/Basic/Sanitizers.def"
1310      Unknown
1311    };
1312    switch (llvm::StringSwitch<unsigned>(Sanitizers[I])
1313#define SANITIZER(NAME, ID) \
1314              .Case(NAME, ID)
1315#include "clang/Basic/Sanitizers.def"
1316              .Default(Unknown)) {
1317#define SANITIZER(NAME, ID) \
1318    case ID: \
1319      Opts.Sanitize.ID = true; \
1320      break;
1321#include "clang/Basic/Sanitizers.def"
1322
1323    case Unknown:
1324      Diags.Report(diag::err_drv_invalid_value)
1325        << "-fsanitize=" << Sanitizers[I];
1326      break;
1327    }
1328  }
1329}
1330
1331static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1332                                  FileManager &FileMgr,
1333                                  DiagnosticsEngine &Diags) {
1334  using namespace options;
1335  Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1336  Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1337  if (const Arg *A = Args.getLastArg(OPT_token_cache))
1338      Opts.TokenCache = A->getValue();
1339  else
1340    Opts.TokenCache = Opts.ImplicitPTHInclude;
1341  Opts.UsePredefines = !Args.hasArg(OPT_undef);
1342  Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1343  Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1344
1345  Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
1346  for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
1347         ie = Args.filtered_end(); it != ie; ++it) {
1348    const Arg *A = *it;
1349    Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
1350  }
1351
1352  if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1353    StringRef Value(A->getValue());
1354    size_t Comma = Value.find(',');
1355    unsigned Bytes = 0;
1356    unsigned EndOfLine = 0;
1357
1358    if (Comma == StringRef::npos ||
1359        Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1360        Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1361      Diags.Report(diag::err_drv_preamble_format);
1362    else {
1363      Opts.PrecompiledPreambleBytes.first = Bytes;
1364      Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1365    }
1366  }
1367
1368  // Add macros from the command line.
1369  for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1370         ie = Args.filtered_end(); it != ie; ++it) {
1371    if ((*it)->getOption().matches(OPT_D))
1372      Opts.addMacroDef((*it)->getValue());
1373    else
1374      Opts.addMacroUndef((*it)->getValue());
1375  }
1376
1377  Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1378
1379  // Add the ordered list of -includes.
1380  for (arg_iterator it = Args.filtered_begin(OPT_include),
1381         ie = Args.filtered_end(); it != ie; ++it) {
1382    const Arg *A = *it;
1383    Opts.Includes.push_back(A->getValue());
1384  }
1385
1386  for (arg_iterator it = Args.filtered_begin(OPT_chain_include),
1387         ie = Args.filtered_end(); it != ie; ++it) {
1388    const Arg *A = *it;
1389    Opts.ChainedIncludes.push_back(A->getValue());
1390  }
1391
1392  // Include 'altivec.h' if -faltivec option present
1393  if (Args.hasArg(OPT_faltivec))
1394    Opts.Includes.push_back("altivec.h");
1395
1396  for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1397         ie = Args.filtered_end(); it != ie; ++it) {
1398    const Arg *A = *it;
1399    std::pair<StringRef,StringRef> Split =
1400      StringRef(A->getValue()).split(';');
1401
1402    if (Split.second.empty()) {
1403      Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1404      continue;
1405    }
1406
1407    Opts.addRemappedFile(Split.first, Split.second);
1408  }
1409
1410  if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
1411    StringRef Name = A->getValue();
1412    unsigned Library = llvm::StringSwitch<unsigned>(Name)
1413      .Case("libc++", ARCXX_libcxx)
1414      .Case("libstdc++", ARCXX_libstdcxx)
1415      .Case("none", ARCXX_nolib)
1416      .Default(~0U);
1417    if (Library == ~0U)
1418      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1419    else
1420      Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
1421  }
1422}
1423
1424static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1425                                        ArgList &Args,
1426                                        frontend::ActionKind Action) {
1427  using namespace options;
1428
1429  switch (Action) {
1430  case frontend::ASTDeclList:
1431  case frontend::ASTDump:
1432  case frontend::ASTDumpXML:
1433  case frontend::ASTPrint:
1434  case frontend::ASTView:
1435  case frontend::EmitAssembly:
1436  case frontend::EmitBC:
1437  case frontend::EmitHTML:
1438  case frontend::EmitLLVM:
1439  case frontend::EmitLLVMOnly:
1440  case frontend::EmitCodeGenOnly:
1441  case frontend::EmitObj:
1442  case frontend::FixIt:
1443  case frontend::GenerateModule:
1444  case frontend::GeneratePCH:
1445  case frontend::GeneratePTH:
1446  case frontend::ParseSyntaxOnly:
1447  case frontend::PluginAction:
1448  case frontend::PrintDeclContext:
1449  case frontend::RewriteObjC:
1450  case frontend::RewriteTest:
1451  case frontend::RunAnalysis:
1452  case frontend::MigrateSource:
1453    Opts.ShowCPP = 0;
1454    break;
1455
1456  case frontend::DumpRawTokens:
1457  case frontend::DumpTokens:
1458  case frontend::InitOnly:
1459  case frontend::PrintPreamble:
1460  case frontend::PrintPreprocessedInput:
1461  case frontend::RewriteMacros:
1462  case frontend::RunPreprocessorOnly:
1463    Opts.ShowCPP = !Args.hasArg(OPT_dM);
1464    break;
1465  }
1466
1467  Opts.ShowComments = Args.hasArg(OPT_C);
1468  Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1469  Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1470  Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1471  Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
1472}
1473
1474static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1475  using namespace options;
1476  Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1477  Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
1478  Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1479  Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
1480  Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1481  Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1482
1483  // Use the default target triple if unspecified.
1484  if (Opts.Triple.empty())
1485    Opts.Triple = llvm::sys::getDefaultTargetTriple();
1486}
1487
1488//
1489
1490bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1491                                        const char *const *ArgBegin,
1492                                        const char *const *ArgEnd,
1493                                        DiagnosticsEngine &Diags) {
1494  bool Success = true;
1495
1496  // Parse the arguments.
1497  OwningPtr<OptTable> Opts(createDriverOptTable());
1498  unsigned MissingArgIndex, MissingArgCount;
1499  OwningPtr<InputArgList> Args(
1500    Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1501
1502  // Check for missing argument error.
1503  if (MissingArgCount) {
1504    Diags.Report(diag::err_drv_missing_argument)
1505      << Args->getArgString(MissingArgIndex) << MissingArgCount;
1506    Success = false;
1507  }
1508
1509  // Issue errors on unknown arguments.
1510  for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1511         ie = Args->filtered_end(); it != ie; ++it) {
1512    Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
1513    Success = false;
1514  }
1515
1516  // Issue errors on arguments that are not valid for CC1.
1517  for (ArgList::iterator I = Args->begin(), E = Args->end();
1518       I != E; ++I) {
1519    if (!(*I)->getOption().hasFlag(options::CC1Option)) {
1520      Diags.Report(diag::err_drv_unknown_argument) << (*I)->getAsString(*Args);
1521      Success = false;
1522    }
1523  }
1524
1525  Success = ParseAnalyzerArgs(*Res.getAnalyzerOpts(), *Args, Diags) && Success;
1526  Success = ParseMigratorArgs(Res.getMigratorOpts(), *Args) && Success;
1527  ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1528  Success = ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, &Diags)
1529            && Success;
1530  ParseCommentArgs(Res.getLangOpts()->CommentOpts, *Args);
1531  ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
1532  // FIXME: We shouldn't have to pass the DashX option around here
1533  InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1534  Success = ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags)
1535            && Success;
1536  ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1537  if (DashX != IK_AST && DashX != IK_LLVM_IR) {
1538    ParseLangArgs(*Res.getLangOpts(), *Args, DashX, Diags);
1539    if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
1540      Res.getLangOpts()->ObjCExceptions = 1;
1541  }
1542  // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
1543  // PCH file and find the original header name. Remove the need to do that in
1544  // ParsePreprocessorArgs and remove the FileManager
1545  // parameters from the function and the "FileManager.h" #include.
1546  FileManager FileMgr(Res.getFileSystemOpts());
1547  ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
1548  ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args,
1549                              Res.getFrontendOpts().ProgramAction);
1550  ParseTargetArgs(Res.getTargetOpts(), *Args);
1551
1552  return Success;
1553}
1554
1555namespace {
1556
1557  class ModuleSignature {
1558    SmallVector<uint64_t, 16> Data;
1559    unsigned CurBit;
1560    uint64_t CurValue;
1561
1562  public:
1563    ModuleSignature() : CurBit(0), CurValue(0) { }
1564
1565    void add(uint64_t Value, unsigned Bits);
1566    void add(StringRef Value);
1567    void flush();
1568
1569    llvm::APInt getAsInteger() const;
1570  };
1571}
1572
1573void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
1574  CurValue |= Value << CurBit;
1575  if (CurBit + NumBits < 64) {
1576    CurBit += NumBits;
1577    return;
1578  }
1579
1580  // Add the current word.
1581  Data.push_back(CurValue);
1582
1583  if (CurBit)
1584    CurValue = Value >> (64-CurBit);
1585  else
1586    CurValue = 0;
1587  CurBit = (CurBit+NumBits) & 63;
1588}
1589
1590void ModuleSignature::flush() {
1591  if (CurBit == 0)
1592    return;
1593
1594  Data.push_back(CurValue);
1595  CurBit = 0;
1596  CurValue = 0;
1597}
1598
1599void ModuleSignature::add(StringRef Value) {
1600  for (StringRef::iterator I = Value.begin(), IEnd = Value.end(); I != IEnd;++I)
1601    add(*I, 8);
1602}
1603
1604llvm::APInt ModuleSignature::getAsInteger() const {
1605  return llvm::APInt(Data.size() * 64, Data);
1606}
1607
1608std::string CompilerInvocation::getModuleHash() const {
1609  using llvm::hash_code;
1610  using llvm::hash_value;
1611  using llvm::hash_combine;
1612
1613  // Start the signature with the compiler version.
1614  // FIXME: We'd rather use something more cryptographically sound than
1615  // CityHash, but this will do for now.
1616  hash_code code = hash_value(getClangFullRepositoryVersion());
1617
1618  // Extend the signature with the language options
1619#define LANGOPT(Name, Bits, Default, Description) \
1620   code = hash_combine(code, LangOpts->Name);
1621#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
1622  code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
1623#define BENIGN_LANGOPT(Name, Bits, Default, Description)
1624#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
1625#include "clang/Basic/LangOptions.def"
1626
1627  // Extend the signature with the target options.
1628  code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
1629                      TargetOpts->ABI, TargetOpts->CXXABI,
1630                      TargetOpts->LinkerVersion);
1631  for (unsigned i = 0, n = TargetOpts->FeaturesAsWritten.size(); i != n; ++i)
1632    code = hash_combine(code, TargetOpts->FeaturesAsWritten[i]);
1633
1634  // Extend the signature with preprocessor options.
1635  const PreprocessorOptions &ppOpts = getPreprocessorOpts();
1636  const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
1637  code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
1638
1639  std::vector<StringRef> MacroDefs;
1640  for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
1641            I = getPreprocessorOpts().Macros.begin(),
1642         IEnd = getPreprocessorOpts().Macros.end();
1643       I != IEnd; ++I) {
1644    // If we're supposed to ignore this macro for the purposes of modules,
1645    // don't put it into the hash.
1646    if (!hsOpts.ModulesIgnoreMacros.empty()) {
1647      // Check whether we're ignoring this macro.
1648      StringRef MacroDef = I->first;
1649      if (hsOpts.ModulesIgnoreMacros.count(MacroDef.split('=').first))
1650        continue;
1651    }
1652
1653    code = hash_combine(code, I->first, I->second);
1654  }
1655
1656  // Extend the signature with the sysroot.
1657  code = hash_combine(code, hsOpts.Sysroot, hsOpts.UseBuiltinIncludes,
1658                      hsOpts.UseStandardSystemIncludes,
1659                      hsOpts.UseStandardCXXIncludes,
1660                      hsOpts.UseLibcxx);
1661
1662  return llvm::APInt(64, code).toString(36, /*Signed=*/false);
1663}
1664