CompilerInvocation.cpp revision c544ba09695e300f31355af342258bd57619e737 
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.DisableGCov = Args.hasArg(OPT_test_coverage);
384  Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
385  Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
386  if (Opts.EmitGcovArcs || Opts.EmitGcovNotes) {
387  Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
388    Opts.CoverageExtraChecksum = Args.hasArg(OPT_coverage_cfg_checksum);
389    Opts.CoverageNoFunctionNamesInData =
390        Args.hasArg(OPT_coverage_no_function_names_in_data);
391    if (Args.hasArg(OPT_coverage_version_EQ)) {
392      StringRef CoverageVersion = Args.getLastArgValue(OPT_coverage_version_EQ);
393      if (CoverageVersion.size() != 4) {
394        Diags.Report(diag::err_drv_invalid_value)
395            << Args.getLastArg(OPT_coverage_version_EQ)->getAsString(Args)
396            << CoverageVersion;
397      } else {
398        memcpy(Opts.CoverageVersion, CoverageVersion.data(), 4);
399      }
400    }
401  }
402
403  Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
404  Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
405  Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
406  Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
407  Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
408  Opts.SanitizerBlacklistFile = Args.getLastArgValue(OPT_fsanitize_blacklist);
409  Opts.SanitizeMemoryTrackOrigins =
410    Args.hasArg(OPT_fsanitize_memory_track_origins);
411  Opts.SanitizeAddressZeroBaseShadow =
412    Args.hasArg(OPT_fsanitize_address_zero_base_shadow);
413  Opts.SanitizeUndefinedTrapOnError =
414    Args.hasArg(OPT_fsanitize_undefined_trap_on_error);
415  Opts.SSPBufferSize =
416    Args.getLastArgIntValue(OPT_stack_protector_buffer_size, 8, Diags);
417  Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
418  if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
419    StringRef Val = A->getValue();
420    unsigned StackAlignment = Opts.StackAlignment;
421    Val.getAsInteger(10, StackAlignment);
422    Opts.StackAlignment = StackAlignment;
423  }
424
425  if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
426    StringRef Name = A->getValue();
427    unsigned Method = llvm::StringSwitch<unsigned>(Name)
428      .Case("legacy", CodeGenOptions::Legacy)
429      .Case("non-legacy", CodeGenOptions::NonLegacy)
430      .Case("mixed", CodeGenOptions::Mixed)
431      .Default(~0U);
432    if (Method == ~0U) {
433      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
434      Success = false;
435    } else {
436      Opts.setObjCDispatchMethod(
437        static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
438    }
439  }
440
441  if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
442    StringRef Name = A->getValue();
443    unsigned Model = llvm::StringSwitch<unsigned>(Name)
444        .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
445        .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
446        .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
447        .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
448        .Default(~0U);
449    if (Model == ~0U) {
450      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
451      Success = false;
452    } else {
453      Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
454    }
455  }
456
457  if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
458    StringRef Val = A->getValue();
459    if (Val == "fast")
460      Opts.setFPContractMode(CodeGenOptions::FPC_Fast);
461    else if (Val == "on")
462      Opts.setFPContractMode(CodeGenOptions::FPC_On);
463    else if (Val == "off")
464      Opts.setFPContractMode(CodeGenOptions::FPC_Off);
465    else
466      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
467  }
468
469  return Success;
470}
471
472static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
473                                      ArgList &Args) {
474  using namespace options;
475  Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
476  Opts.Targets = Args.getAllArgValues(OPT_MT);
477  Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
478  Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
479  Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
480  Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
481  Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
482  Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
483}
484
485bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
486                                DiagnosticsEngine *Diags) {
487  using namespace options;
488  bool Success = true;
489
490  Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
491  Opts.DiagnosticSerializationFile =
492    Args.getLastArgValue(OPT_diagnostic_serialized_file);
493  Opts.IgnoreWarnings = Args.hasArg(OPT_w);
494  Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
495  Opts.Pedantic = Args.hasArg(OPT_pedantic);
496  Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
497  Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
498  Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
499  Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
500                                 OPT_fno_show_column,
501                                 /*Default=*/true);
502  Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
503  Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
504  Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
505
506  // Default behavior is to not to show note include stacks.
507  Opts.ShowNoteIncludeStack = false;
508  if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
509                               OPT_fno_diagnostics_show_note_include_stack))
510    if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
511      Opts.ShowNoteIncludeStack = true;
512
513  StringRef ShowOverloads =
514    Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
515  if (ShowOverloads == "best")
516    Opts.setShowOverloads(Ovl_Best);
517  else if (ShowOverloads == "all")
518    Opts.setShowOverloads(Ovl_All);
519  else {
520    Success = false;
521    if (Diags)
522      Diags->Report(diag::err_drv_invalid_value)
523      << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
524      << ShowOverloads;
525  }
526
527  StringRef ShowCategory =
528    Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
529  if (ShowCategory == "none")
530    Opts.ShowCategories = 0;
531  else if (ShowCategory == "id")
532    Opts.ShowCategories = 1;
533  else if (ShowCategory == "name")
534    Opts.ShowCategories = 2;
535  else {
536    Success = false;
537    if (Diags)
538      Diags->Report(diag::err_drv_invalid_value)
539      << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
540      << ShowCategory;
541  }
542
543  StringRef Format =
544    Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
545  if (Format == "clang")
546    Opts.setFormat(DiagnosticOptions::Clang);
547  else if (Format == "msvc")
548    Opts.setFormat(DiagnosticOptions::Msvc);
549  else if (Format == "vi")
550    Opts.setFormat(DiagnosticOptions::Vi);
551  else {
552    Success = false;
553    if (Diags)
554      Diags->Report(diag::err_drv_invalid_value)
555      << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
556      << Format;
557  }
558
559  Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
560  Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
561  Opts.ShowPresumedLoc = !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
562  Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
563  Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
564  Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
565  Opts.WarnOnSpellCheck = Args.hasArg(OPT_fwarn_on_spellcheck);
566  Opts.ErrorLimit = Args.getLastArgIntValue(OPT_ferror_limit, 0, Diags);
567  Opts.MacroBacktraceLimit
568    = Args.getLastArgIntValue(OPT_fmacro_backtrace_limit,
569                         DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
570  Opts.TemplateBacktraceLimit
571    = Args.getLastArgIntValue(OPT_ftemplate_backtrace_limit,
572                         DiagnosticOptions::DefaultTemplateBacktraceLimit,
573                         Diags);
574  Opts.ConstexprBacktraceLimit
575    = Args.getLastArgIntValue(OPT_fconstexpr_backtrace_limit,
576                         DiagnosticOptions::DefaultConstexprBacktraceLimit,
577                         Diags);
578  Opts.TabStop = Args.getLastArgIntValue(OPT_ftabstop,
579                                    DiagnosticOptions::DefaultTabStop, Diags);
580  if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
581    Opts.TabStop = DiagnosticOptions::DefaultTabStop;
582    if (Diags)
583      Diags->Report(diag::warn_ignoring_ftabstop_value)
584      << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
585  }
586  Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
587  addWarningArgs(Args, Opts.Warnings);
588
589  return Success;
590}
591
592static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
593  Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
594}
595
596static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
597                                   DiagnosticsEngine &Diags) {
598  using namespace options;
599  Opts.ProgramAction = frontend::ParseSyntaxOnly;
600  if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
601    switch (A->getOption().getID()) {
602    default:
603      llvm_unreachable("Invalid option in group!");
604    case OPT_ast_list:
605      Opts.ProgramAction = frontend::ASTDeclList; break;
606    case OPT_ast_dump:
607      Opts.ProgramAction = frontend::ASTDump; break;
608    case OPT_ast_dump_xml:
609      Opts.ProgramAction = frontend::ASTDumpXML; break;
610    case OPT_ast_print:
611      Opts.ProgramAction = frontend::ASTPrint; break;
612    case OPT_ast_view:
613      Opts.ProgramAction = frontend::ASTView; break;
614    case OPT_dump_raw_tokens:
615      Opts.ProgramAction = frontend::DumpRawTokens; break;
616    case OPT_dump_tokens:
617      Opts.ProgramAction = frontend::DumpTokens; break;
618    case OPT_S:
619      Opts.ProgramAction = frontend::EmitAssembly; break;
620    case OPT_emit_llvm_bc:
621      Opts.ProgramAction = frontend::EmitBC; break;
622    case OPT_emit_html:
623      Opts.ProgramAction = frontend::EmitHTML; break;
624    case OPT_emit_llvm:
625      Opts.ProgramAction = frontend::EmitLLVM; break;
626    case OPT_emit_llvm_only:
627      Opts.ProgramAction = frontend::EmitLLVMOnly; break;
628    case OPT_emit_codegen_only:
629      Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
630    case OPT_emit_obj:
631      Opts.ProgramAction = frontend::EmitObj; break;
632    case OPT_fixit_EQ:
633      Opts.FixItSuffix = A->getValue();
634      // fall-through!
635    case OPT_fixit:
636      Opts.ProgramAction = frontend::FixIt; break;
637    case OPT_emit_module:
638      Opts.ProgramAction = frontend::GenerateModule; break;
639    case OPT_emit_pch:
640      Opts.ProgramAction = frontend::GeneratePCH; break;
641    case OPT_emit_pth:
642      Opts.ProgramAction = frontend::GeneratePTH; break;
643    case OPT_init_only:
644      Opts.ProgramAction = frontend::InitOnly; break;
645    case OPT_fsyntax_only:
646      Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
647    case OPT_module_file_info:
648      Opts.ProgramAction = frontend::ModuleFileInfo; break;
649    case OPT_print_decl_contexts:
650      Opts.ProgramAction = frontend::PrintDeclContext; break;
651    case OPT_print_preamble:
652      Opts.ProgramAction = frontend::PrintPreamble; break;
653    case OPT_E:
654      Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
655    case OPT_rewrite_macros:
656      Opts.ProgramAction = frontend::RewriteMacros; break;
657    case OPT_rewrite_objc:
658      Opts.ProgramAction = frontend::RewriteObjC; break;
659    case OPT_rewrite_test:
660      Opts.ProgramAction = frontend::RewriteTest; break;
661    case OPT_analyze:
662      Opts.ProgramAction = frontend::RunAnalysis; break;
663    case OPT_migrate:
664      Opts.ProgramAction = frontend::MigrateSource; break;
665    case OPT_Eonly:
666      Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
667    }
668  }
669
670  if (const Arg* A = Args.getLastArg(OPT_plugin)) {
671    Opts.Plugins.push_back(A->getValue(0));
672    Opts.ProgramAction = frontend::PluginAction;
673    Opts.ActionName = A->getValue();
674
675    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
676           end = Args.filtered_end(); it != end; ++it) {
677      if ((*it)->getValue(0) == Opts.ActionName)
678        Opts.PluginArgs.push_back((*it)->getValue(1));
679    }
680  }
681
682  Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
683  Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
684  for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
685    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
686           end = Args.filtered_end(); it != end; ++it) {
687      if ((*it)->getValue(0) == Opts.AddPluginActions[i])
688        Opts.AddPluginArgs[i].push_back((*it)->getValue(1));
689    }
690  }
691
692  if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
693    Opts.CodeCompletionAt =
694      ParsedSourceLocation::FromString(A->getValue());
695    if (Opts.CodeCompletionAt.FileName.empty())
696      Diags.Report(diag::err_drv_invalid_value)
697        << A->getAsString(Args) << A->getValue();
698  }
699  Opts.DisableFree = Args.hasArg(OPT_disable_free);
700
701  Opts.OutputFile = Args.getLastArgValue(OPT_o);
702  Opts.Plugins = Args.getAllArgValues(OPT_load);
703  Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
704  Opts.ShowHelp = Args.hasArg(OPT_help);
705  Opts.ShowStats = Args.hasArg(OPT_print_stats);
706  Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
707  Opts.ShowVersion = Args.hasArg(OPT_version);
708  Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
709  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
710  Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
711  Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
712  Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
713  Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
714  Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
715  Opts.UseGlobalModuleIndex = !Args.hasArg(OPT_fno_modules_global_index);
716  Opts.GenerateGlobalModuleIndex = Opts.UseGlobalModuleIndex;
717
718  Opts.CodeCompleteOpts.IncludeMacros
719    = Args.hasArg(OPT_code_completion_macros);
720  Opts.CodeCompleteOpts.IncludeCodePatterns
721    = Args.hasArg(OPT_code_completion_patterns);
722  Opts.CodeCompleteOpts.IncludeGlobals
723    = !Args.hasArg(OPT_no_code_completion_globals);
724  Opts.CodeCompleteOpts.IncludeBriefComments
725    = Args.hasArg(OPT_code_completion_brief_comments);
726
727  Opts.OverrideRecordLayoutsFile
728    = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
729  if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
730                                     OPT_arcmt_modify,
731                                     OPT_arcmt_migrate)) {
732    switch (A->getOption().getID()) {
733    default:
734      llvm_unreachable("missed a case");
735    case OPT_arcmt_check:
736      Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
737      break;
738    case OPT_arcmt_modify:
739      Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
740      break;
741    case OPT_arcmt_migrate:
742      Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
743      break;
744    }
745  }
746  Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
747  Opts.ARCMTMigrateReportOut
748    = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
749  Opts.ARCMTMigrateEmitARCErrors
750    = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
751
752  if (Args.hasArg(OPT_objcmt_migrate_literals))
753    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
754  if (Args.hasArg(OPT_objcmt_migrate_subscripting))
755    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
756
757  if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
758      Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
759    Diags.Report(diag::err_drv_argument_not_allowed_with)
760      << "ARC migration" << "ObjC migration";
761  }
762
763  InputKind DashX = IK_None;
764  if (const Arg *A = Args.getLastArg(OPT_x)) {
765    DashX = llvm::StringSwitch<InputKind>(A->getValue())
766      .Case("c", IK_C)
767      .Case("cl", IK_OpenCL)
768      .Case("cuda", IK_CUDA)
769      .Case("c++", IK_CXX)
770      .Case("objective-c", IK_ObjC)
771      .Case("objective-c++", IK_ObjCXX)
772      .Case("cpp-output", IK_PreprocessedC)
773      .Case("assembler-with-cpp", IK_Asm)
774      .Case("c++-cpp-output", IK_PreprocessedCXX)
775      .Case("objective-c-cpp-output", IK_PreprocessedObjC)
776      .Case("objc-cpp-output", IK_PreprocessedObjC)
777      .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
778      .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
779      .Case("c-header", IK_C)
780      .Case("cl-header", IK_OpenCL)
781      .Case("objective-c-header", IK_ObjC)
782      .Case("c++-header", IK_CXX)
783      .Case("objective-c++-header", IK_ObjCXX)
784      .Cases("ast", "pcm", IK_AST)
785      .Case("ir", IK_LLVM_IR)
786      .Default(IK_None);
787    if (DashX == IK_None)
788      Diags.Report(diag::err_drv_invalid_value)
789        << A->getAsString(Args) << A->getValue();
790  }
791
792  // '-' is the default input if none is given.
793  std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
794  Opts.Inputs.clear();
795  if (Inputs.empty())
796    Inputs.push_back("-");
797  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
798    InputKind IK = DashX;
799    if (IK == IK_None) {
800      IK = FrontendOptions::getInputKindForExtension(
801        StringRef(Inputs[i]).rsplit('.').second);
802      // FIXME: Remove this hack.
803      if (i == 0)
804        DashX = IK;
805    }
806    Opts.Inputs.push_back(FrontendInputFile(Inputs[i], IK));
807  }
808
809  return DashX;
810}
811
812std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
813                                                 void *MainAddr) {
814  llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
815
816  if (!P.isEmpty()) {
817    P.eraseComponent();  // Remove /clang from foo/bin/clang
818    P.eraseComponent();  // Remove /bin   from foo/bin
819
820    // Get foo/lib/clang/<version>/include
821    P.appendComponent("lib");
822    P.appendComponent("clang");
823    P.appendComponent(CLANG_VERSION_STRING);
824  }
825
826  return P.str();
827}
828
829static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
830  using namespace options;
831  Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
832  Opts.Verbose = Args.hasArg(OPT_v);
833  Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
834  Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
835  Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
836  if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
837    Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
838  Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
839  Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodules_cache_path);
840  Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
841  Opts.ModuleCachePruneInterval
842    = Args.getLastArgIntValue(OPT_fmodules_prune_interval, 7*24*60*60);
843  Opts.ModuleCachePruneAfter
844    = Args.getLastArgIntValue(OPT_fmodules_prune_after, 31*24*60*60);
845  for (arg_iterator it = Args.filtered_begin(OPT_fmodules_ignore_macro),
846       ie = Args.filtered_end(); it != ie; ++it) {
847    StringRef MacroDef = (*it)->getValue();
848    Opts.ModulesIgnoreMacros.insert(MacroDef.split('=').first);
849  }
850
851  // Add -I..., -F..., and -index-header-map options in order.
852  bool IsIndexHeaderMap = false;
853  for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F,
854                                             OPT_index_header_map),
855       ie = Args.filtered_end(); it != ie; ++it) {
856    if ((*it)->getOption().matches(OPT_index_header_map)) {
857      // -index-header-map applies to the next -I or -F.
858      IsIndexHeaderMap = true;
859      continue;
860    }
861
862    frontend::IncludeDirGroup Group
863      = IsIndexHeaderMap? frontend::IndexHeaderMap : frontend::Angled;
864
865    Opts.AddPath((*it)->getValue(), Group,
866                 /*IsFramework=*/ (*it)->getOption().matches(OPT_F), true);
867    IsIndexHeaderMap = false;
868  }
869
870  // Add -iprefix/-iwithprefix/-iwithprefixbefore options.
871  StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
872  for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
873                                             OPT_iwithprefixbefore),
874         ie = Args.filtered_end(); it != ie; ++it) {
875    const Arg *A = *it;
876    if (A->getOption().matches(OPT_iprefix))
877      Prefix = A->getValue();
878    else if (A->getOption().matches(OPT_iwithprefix))
879      Opts.AddPath(Prefix.str() + A->getValue(),
880                   frontend::After, false, true);
881    else
882      Opts.AddPath(Prefix.str() + A->getValue(),
883                   frontend::Angled, false, true);
884  }
885
886  for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
887         ie = Args.filtered_end(); it != ie; ++it)
888    Opts.AddPath((*it)->getValue(), frontend::After, false, true);
889  for (arg_iterator it = Args.filtered_begin(OPT_iquote),
890         ie = Args.filtered_end(); it != ie; ++it)
891    Opts.AddPath((*it)->getValue(), frontend::Quoted, false, true);
892  for (arg_iterator it = Args.filtered_begin(OPT_isystem,
893         OPT_iwithsysroot), ie = Args.filtered_end(); it != ie; ++it)
894    Opts.AddPath((*it)->getValue(), frontend::System, false,
895                 !(*it)->getOption().matches(OPT_iwithsysroot));
896  for (arg_iterator it = Args.filtered_begin(OPT_iframework),
897         ie = Args.filtered_end(); it != ie; ++it)
898    Opts.AddPath((*it)->getValue(), frontend::System, true, true);
899
900  // Add the paths for the various language specific isystem flags.
901  for (arg_iterator it = Args.filtered_begin(OPT_c_isystem),
902       ie = Args.filtered_end(); it != ie; ++it)
903    Opts.AddPath((*it)->getValue(), frontend::CSystem, false, true);
904  for (arg_iterator it = Args.filtered_begin(OPT_cxx_isystem),
905       ie = Args.filtered_end(); it != ie; ++it)
906    Opts.AddPath((*it)->getValue(), frontend::CXXSystem, false, true);
907  for (arg_iterator it = Args.filtered_begin(OPT_objc_isystem),
908       ie = Args.filtered_end(); it != ie; ++it)
909    Opts.AddPath((*it)->getValue(), frontend::ObjCSystem, false,true);
910  for (arg_iterator it = Args.filtered_begin(OPT_objcxx_isystem),
911       ie = Args.filtered_end(); it != ie; ++it)
912    Opts.AddPath((*it)->getValue(), frontend::ObjCXXSystem, false, true);
913
914  // Add the internal paths from a driver that detects standard include paths.
915  for (arg_iterator I = Args.filtered_begin(OPT_internal_isystem,
916                                            OPT_internal_externc_isystem),
917                    E = Args.filtered_end();
918       I != E; ++I) {
919    frontend::IncludeDirGroup Group = frontend::System;
920    if ((*I)->getOption().matches(OPT_internal_externc_isystem))
921      Group = frontend::ExternCSystem;
922    Opts.AddPath((*I)->getValue(), Group, false, true);
923  }
924
925  // Add the path prefixes which are implicitly treated as being system headers.
926  for (arg_iterator I = Args.filtered_begin(OPT_isystem_prefix,
927                                            OPT_ino_system_prefix),
928                    E = Args.filtered_end();
929       I != E; ++I)
930    Opts.AddSystemHeaderPrefix((*I)->getValue(),
931                               (*I)->getOption().matches(OPT_isystem_prefix));
932}
933
934void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
935                                         LangStandard::Kind LangStd) {
936  // Set some properties which depend solely on the input kind; it would be nice
937  // to move these to the language standard, and have the driver resolve the
938  // input kind + language standard.
939  if (IK == IK_Asm) {
940    Opts.AsmPreprocessor = 1;
941  } else if (IK == IK_ObjC ||
942             IK == IK_ObjCXX ||
943             IK == IK_PreprocessedObjC ||
944             IK == IK_PreprocessedObjCXX) {
945    Opts.ObjC1 = Opts.ObjC2 = 1;
946  }
947
948  if (LangStd == LangStandard::lang_unspecified) {
949    // Based on the base language, pick one.
950    switch (IK) {
951    case IK_None:
952    case IK_AST:
953    case IK_LLVM_IR:
954      llvm_unreachable("Invalid input kind!");
955    case IK_OpenCL:
956      LangStd = LangStandard::lang_opencl;
957      break;
958    case IK_CUDA:
959      LangStd = LangStandard::lang_cuda;
960      break;
961    case IK_Asm:
962    case IK_C:
963    case IK_PreprocessedC:
964    case IK_ObjC:
965    case IK_PreprocessedObjC:
966      LangStd = LangStandard::lang_gnu99;
967      break;
968    case IK_CXX:
969    case IK_PreprocessedCXX:
970    case IK_ObjCXX:
971    case IK_PreprocessedObjCXX:
972      LangStd = LangStandard::lang_gnucxx98;
973      break;
974    }
975  }
976
977  const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
978  Opts.LineComment = Std.hasLineComments();
979  Opts.C99 = Std.isC99();
980  Opts.C11 = Std.isC11();
981  Opts.CPlusPlus = Std.isCPlusPlus();
982  Opts.CPlusPlus11 = Std.isCPlusPlus11();
983  Opts.CPlusPlus1y = Std.isCPlusPlus1y();
984  Opts.Digraphs = Std.hasDigraphs();
985  Opts.GNUMode = Std.isGNUMode();
986  Opts.GNUInline = !Std.isC99();
987  Opts.HexFloats = Std.hasHexFloats();
988  Opts.ImplicitInt = Std.hasImplicitInt();
989
990  // Set OpenCL Version.
991  if (LangStd == LangStandard::lang_opencl) {
992    Opts.OpenCL = 1;
993    Opts.OpenCLVersion = 100;
994  }
995  else if (LangStd == LangStandard::lang_opencl11) {
996      Opts.OpenCL = 1;
997      Opts.OpenCLVersion = 110;
998  }
999  else if (LangStd == LangStandard::lang_opencl12) {
1000    Opts.OpenCL = 1;
1001    Opts.OpenCLVersion = 120;
1002  }
1003
1004  // OpenCL has some additional defaults.
1005  if (Opts.OpenCL) {
1006    Opts.AltiVec = 0;
1007    Opts.CXXOperatorNames = 1;
1008    Opts.LaxVectorConversions = 0;
1009    Opts.DefaultFPContract = 1;
1010    Opts.NativeHalfType = 1;
1011  }
1012
1013  if (LangStd == LangStandard::lang_cuda)
1014    Opts.CUDA = 1;
1015
1016  // OpenCL and C++ both have bool, true, false keywords.
1017  Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1018
1019  // C++ has wchar_t keyword.
1020  Opts.WChar = Opts.CPlusPlus;
1021
1022  Opts.GNUKeywords = Opts.GNUMode;
1023  Opts.CXXOperatorNames = Opts.CPlusPlus;
1024
1025  // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1026  // is specified, or -std is set to a conforming mode.
1027  Opts.Trigraphs = !Opts.GNUMode;
1028
1029  Opts.DollarIdents = !Opts.AsmPreprocessor;
1030}
1031
1032/// Attempt to parse a visibility value out of the given argument.
1033static Visibility parseVisibility(Arg *arg, ArgList &args,
1034                                  DiagnosticsEngine &diags) {
1035  StringRef value = arg->getValue();
1036  if (value == "default") {
1037    return DefaultVisibility;
1038  } else if (value == "hidden") {
1039    return HiddenVisibility;
1040  } else if (value == "protected") {
1041    // FIXME: diagnose if target does not support protected visibility
1042    return ProtectedVisibility;
1043  }
1044
1045  diags.Report(diag::err_drv_invalid_value)
1046    << arg->getAsString(args) << value;
1047  return DefaultVisibility;
1048}
1049
1050static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1051                          DiagnosticsEngine &Diags) {
1052  // FIXME: Cleanup per-file based stuff.
1053  LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1054  if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1055    LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1056#define LANGSTANDARD(id, name, desc, features) \
1057      .Case(name, LangStandard::lang_##id)
1058#include "clang/Frontend/LangStandards.def"
1059      .Default(LangStandard::lang_unspecified);
1060    if (LangStd == LangStandard::lang_unspecified)
1061      Diags.Report(diag::err_drv_invalid_value)
1062        << A->getAsString(Args) << A->getValue();
1063    else {
1064      // Valid standard, check to make sure language and standard are compatable.
1065      const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1066      switch (IK) {
1067      case IK_C:
1068      case IK_ObjC:
1069      case IK_PreprocessedC:
1070      case IK_PreprocessedObjC:
1071        if (!(Std.isC89() || Std.isC99()))
1072          Diags.Report(diag::err_drv_argument_not_allowed_with)
1073            << A->getAsString(Args) << "C/ObjC";
1074        break;
1075      case IK_CXX:
1076      case IK_ObjCXX:
1077      case IK_PreprocessedCXX:
1078      case IK_PreprocessedObjCXX:
1079        if (!Std.isCPlusPlus())
1080          Diags.Report(diag::err_drv_argument_not_allowed_with)
1081            << A->getAsString(Args) << "C++/ObjC++";
1082        break;
1083      case IK_OpenCL:
1084        if (!Std.isC99())
1085          Diags.Report(diag::err_drv_argument_not_allowed_with)
1086            << A->getAsString(Args) << "OpenCL";
1087        break;
1088      case IK_CUDA:
1089        if (!Std.isCPlusPlus())
1090          Diags.Report(diag::err_drv_argument_not_allowed_with)
1091            << A->getAsString(Args) << "CUDA";
1092        break;
1093      default:
1094        break;
1095      }
1096    }
1097  }
1098
1099  // -cl-std only applies for OpenCL language standards.
1100  // Override the -std option in this case.
1101  if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1102    LangStandard::Kind OpenCLLangStd
1103    = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1104    .Case("CL", LangStandard::lang_opencl)
1105    .Case("CL1.1", LangStandard::lang_opencl11)
1106    .Case("CL1.2", LangStandard::lang_opencl12)
1107    .Default(LangStandard::lang_unspecified);
1108
1109    if (OpenCLLangStd == LangStandard::lang_unspecified) {
1110      Diags.Report(diag::err_drv_invalid_value)
1111      << A->getAsString(Args) << A->getValue();
1112    }
1113    else
1114      LangStd = OpenCLLangStd;
1115  }
1116
1117  CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1118
1119  // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1120  // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1121  // while a subset (the non-C++ GNU keywords) is provided by GCC's
1122  // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1123  // name, as it doesn't seem a useful distinction.
1124  Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1125                                  Opts.GNUKeywords);
1126
1127  if (Args.hasArg(OPT_fno_operator_names))
1128    Opts.CXXOperatorNames = 0;
1129
1130  if (Opts.ObjC1) {
1131    if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1132      StringRef value = arg->getValue();
1133      if (Opts.ObjCRuntime.tryParse(value))
1134        Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1135    }
1136
1137    if (Args.hasArg(OPT_fobjc_gc_only))
1138      Opts.setGC(LangOptions::GCOnly);
1139    else if (Args.hasArg(OPT_fobjc_gc))
1140      Opts.setGC(LangOptions::HybridGC);
1141    else if (Args.hasArg(OPT_fobjc_arc)) {
1142      Opts.ObjCAutoRefCount = 1;
1143      if (!Opts.ObjCRuntime.allowsARC())
1144        Diags.Report(diag::err_arc_unsupported_on_runtime);
1145
1146      // Only set ObjCARCWeak if ARC is enabled.
1147      if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1148        Opts.ObjCARCWeak = 1;
1149      else
1150        Opts.ObjCARCWeak = Opts.ObjCRuntime.allowsWeak();
1151    }
1152
1153    if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1154      Opts.ObjCInferRelatedResultType = 0;
1155  }
1156
1157  if (Args.hasArg(OPT_fgnu89_inline))
1158    Opts.GNUInline = 1;
1159
1160  if (Args.hasArg(OPT_fapple_kext)) {
1161    if (!Opts.CPlusPlus)
1162      Diags.Report(diag::warn_c_kext);
1163    else
1164      Opts.AppleKext = 1;
1165  }
1166
1167  if (Args.hasArg(OPT_print_ivar_layout))
1168    Opts.ObjCGCBitmapPrint = 1;
1169  if (Args.hasArg(OPT_fno_constant_cfstrings))
1170    Opts.NoConstantCFStrings = 1;
1171
1172  if (Args.hasArg(OPT_faltivec))
1173    Opts.AltiVec = 1;
1174
1175  if (Args.hasArg(OPT_pthread))
1176    Opts.POSIXThreads = 1;
1177
1178  if (Args.hasArg(OPT_fdelayed_template_parsing))
1179    Opts.DelayedTemplateParsing = 1;
1180
1181  // The value-visibility mode defaults to "default".
1182  if (Arg *visOpt = Args.getLastArg(OPT_fvisibility)) {
1183    Opts.setValueVisibilityMode(parseVisibility(visOpt, Args, Diags));
1184  } else {
1185    Opts.setValueVisibilityMode(DefaultVisibility);
1186  }
1187
1188  // The type-visibility mode defaults to the value-visibility mode.
1189  if (Arg *typeVisOpt = Args.getLastArg(OPT_ftype_visibility)) {
1190    Opts.setTypeVisibilityMode(parseVisibility(typeVisOpt, Args, Diags));
1191  } else {
1192    Opts.setTypeVisibilityMode(Opts.getValueVisibilityMode());
1193  }
1194
1195  if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1196    Opts.InlineVisibilityHidden = 1;
1197
1198  if (Args.hasArg(OPT_ftrapv)) {
1199    Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1200    // Set the handler, if one is specified.
1201    Opts.OverflowHandler =
1202        Args.getLastArgValue(OPT_ftrapv_handler);
1203  }
1204  else if (Args.hasArg(OPT_fwrapv))
1205    Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1206
1207  if (Args.hasArg(OPT_trigraphs))
1208    Opts.Trigraphs = 1;
1209
1210  Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1211                                   OPT_fno_dollars_in_identifiers,
1212                                   Opts.DollarIdents);
1213  Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1214  Opts.MicrosoftExt
1215    = Args.hasArg(OPT_fms_extensions) || Args.hasArg(OPT_fms_compatibility);
1216  Opts.MicrosoftMode = Args.hasArg(OPT_fms_compatibility);
1217  Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
1218  Opts.MSCVersion = Args.getLastArgIntValue(OPT_fmsc_version, 0, Diags);
1219  Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1220  Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1221  Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
1222                                   Opts.ConstStrings);
1223  if (Args.hasArg(OPT_fno_lax_vector_conversions))
1224    Opts.LaxVectorConversions = 0;
1225  if (Args.hasArg(OPT_fno_threadsafe_statics))
1226    Opts.ThreadsafeStatics = 0;
1227  Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1228  Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
1229  Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
1230  Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1231  Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
1232
1233  Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1234  Opts.Blocks = Args.hasArg(OPT_fblocks);
1235  Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
1236  Opts.Modules = Args.hasArg(OPT_fmodules);
1237  Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1238  Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
1239  Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1240  Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1241  Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1242  Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1243  Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1244  Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1245  Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1246  Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1247  Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1248  Opts.InstantiationDepth = Args.getLastArgIntValue(OPT_ftemplate_depth, 512,
1249                                                    Diags);
1250  Opts.ConstexprCallDepth = Args.getLastArgIntValue(OPT_fconstexpr_depth, 512,
1251                                                    Diags);
1252  Opts.BracketDepth = Args.getLastArgIntValue(OPT_fbracket_depth, 256, Diags);
1253  Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
1254  Opts.NumLargeByValueCopy = Args.getLastArgIntValue(OPT_Wlarge_by_value_copy_EQ,
1255                                                    0, Diags);
1256  Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
1257  Opts.ObjCConstantStringClass =
1258    Args.getLastArgValue(OPT_fconstant_string_class);
1259  Opts.ObjCDefaultSynthProperties =
1260    Args.hasArg(OPT_fobjc_default_synthesize_properties);
1261  Opts.EncodeExtendedBlockSig =
1262    Args.hasArg(OPT_fencode_extended_block_signature);
1263  Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1264  Opts.PackStruct = Args.getLastArgIntValue(OPT_fpack_struct_EQ, 0, Diags);
1265  Opts.PICLevel = Args.getLastArgIntValue(OPT_pic_level, 0, Diags);
1266  Opts.PIELevel = Args.getLastArgIntValue(OPT_pie_level, 0, Diags);
1267  Opts.Static = Args.hasArg(OPT_static_define);
1268  Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
1269  Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
1270                        || Args.hasArg(OPT_fdump_record_layouts);
1271  Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1272  Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1273  Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1274  Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
1275  Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
1276  Opts.MRTD = Args.hasArg(OPT_mrtd);
1277  Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
1278  Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
1279  Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
1280  Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
1281  Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
1282  Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
1283  Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
1284  Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
1285
1286  // Check if -fopenmp is specified.
1287  Opts.OpenMP = Args.hasArg(OPT_fopenmp);
1288
1289  // Record whether the __DEPRECATED define was requested.
1290  Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
1291                                 OPT_fno_deprecated_macro,
1292                                 Opts.Deprecated);
1293
1294  // FIXME: Eliminate this dependency.
1295  unsigned Opt = getOptimizationLevel(Args, IK, Diags),
1296       OptSize = getOptimizationLevelSize(Args, IK, Diags);
1297  Opts.Optimize = Opt != 0;
1298  Opts.OptimizeSize = OptSize != 0;
1299
1300  // This is the __NO_INLINE__ define, which just depends on things like the
1301  // optimization level and -fno-inline, not actually whether the backend has
1302  // inlining enabled.
1303  Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
1304
1305  Opts.FastMath = Args.hasArg(OPT_ffast_math);
1306  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only);
1307
1308  Opts.RetainCommentsFromSystemHeaders =
1309      Args.hasArg(OPT_fretain_comments_from_system_headers);
1310
1311  unsigned SSP = Args.getLastArgIntValue(OPT_stack_protector, 0, Diags);
1312  switch (SSP) {
1313  default:
1314    Diags.Report(diag::err_drv_invalid_value)
1315      << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1316    break;
1317  case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
1318  case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
1319  case 2: Opts.setStackProtector(LangOptions::SSPReq); break;
1320  }
1321
1322  // Parse -fsanitize= arguments.
1323  std::vector<std::string> Sanitizers = Args.getAllArgValues(OPT_fsanitize_EQ);
1324  for (unsigned I = 0, N = Sanitizers.size(); I != N; ++I) {
1325    // Since the Opts.Sanitize* values are bitfields, it's a little tricky to
1326    // efficiently map string values to them. Perform the mapping indirectly:
1327    // convert strings to enumerated values, then switch over the enum to set
1328    // the right bitfield value.
1329    enum Sanitizer {
1330#define SANITIZER(NAME, ID) \
1331      ID,
1332#include "clang/Basic/Sanitizers.def"
1333      Unknown
1334    };
1335    switch (llvm::StringSwitch<unsigned>(Sanitizers[I])
1336#define SANITIZER(NAME, ID) \
1337              .Case(NAME, ID)
1338#include "clang/Basic/Sanitizers.def"
1339              .Default(Unknown)) {
1340#define SANITIZER(NAME, ID) \
1341    case ID: \
1342      Opts.Sanitize.ID = true; \
1343      break;
1344#include "clang/Basic/Sanitizers.def"
1345
1346    case Unknown:
1347      Diags.Report(diag::err_drv_invalid_value)
1348        << "-fsanitize=" << Sanitizers[I];
1349      break;
1350    }
1351  }
1352}
1353
1354static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1355                                  FileManager &FileMgr,
1356                                  DiagnosticsEngine &Diags) {
1357  using namespace options;
1358  Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1359  Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1360  if (const Arg *A = Args.getLastArg(OPT_token_cache))
1361      Opts.TokenCache = A->getValue();
1362  else
1363    Opts.TokenCache = Opts.ImplicitPTHInclude;
1364  Opts.UsePredefines = !Args.hasArg(OPT_undef);
1365  Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1366  Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1367
1368  Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
1369  for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
1370         ie = Args.filtered_end(); it != ie; ++it) {
1371    const Arg *A = *it;
1372    Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
1373  }
1374
1375  if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1376    StringRef Value(A->getValue());
1377    size_t Comma = Value.find(',');
1378    unsigned Bytes = 0;
1379    unsigned EndOfLine = 0;
1380
1381    if (Comma == StringRef::npos ||
1382        Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1383        Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1384      Diags.Report(diag::err_drv_preamble_format);
1385    else {
1386      Opts.PrecompiledPreambleBytes.first = Bytes;
1387      Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1388    }
1389  }
1390
1391  // Add macros from the command line.
1392  for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1393         ie = Args.filtered_end(); it != ie; ++it) {
1394    if ((*it)->getOption().matches(OPT_D))
1395      Opts.addMacroDef((*it)->getValue());
1396    else
1397      Opts.addMacroUndef((*it)->getValue());
1398  }
1399
1400  Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1401
1402  // Add the ordered list of -includes.
1403  for (arg_iterator it = Args.filtered_begin(OPT_include),
1404         ie = Args.filtered_end(); it != ie; ++it) {
1405    const Arg *A = *it;
1406    Opts.Includes.push_back(A->getValue());
1407  }
1408
1409  for (arg_iterator it = Args.filtered_begin(OPT_chain_include),
1410         ie = Args.filtered_end(); it != ie; ++it) {
1411    const Arg *A = *it;
1412    Opts.ChainedIncludes.push_back(A->getValue());
1413  }
1414
1415  // Include 'altivec.h' if -faltivec option present
1416  if (Args.hasArg(OPT_faltivec))
1417    Opts.Includes.push_back("altivec.h");
1418
1419  for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1420         ie = Args.filtered_end(); it != ie; ++it) {
1421    const Arg *A = *it;
1422    std::pair<StringRef,StringRef> Split =
1423      StringRef(A->getValue()).split(';');
1424
1425    if (Split.second.empty()) {
1426      Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1427      continue;
1428    }
1429
1430    Opts.addRemappedFile(Split.first, Split.second);
1431  }
1432
1433  if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
1434    StringRef Name = A->getValue();
1435    unsigned Library = llvm::StringSwitch<unsigned>(Name)
1436      .Case("libc++", ARCXX_libcxx)
1437      .Case("libstdc++", ARCXX_libstdcxx)
1438      .Case("none", ARCXX_nolib)
1439      .Default(~0U);
1440    if (Library == ~0U)
1441      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1442    else
1443      Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
1444  }
1445}
1446
1447static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1448                                        ArgList &Args,
1449                                        frontend::ActionKind Action) {
1450  using namespace options;
1451
1452  switch (Action) {
1453  case frontend::ASTDeclList:
1454  case frontend::ASTDump:
1455  case frontend::ASTDumpXML:
1456  case frontend::ASTPrint:
1457  case frontend::ASTView:
1458  case frontend::EmitAssembly:
1459  case frontend::EmitBC:
1460  case frontend::EmitHTML:
1461  case frontend::EmitLLVM:
1462  case frontend::EmitLLVMOnly:
1463  case frontend::EmitCodeGenOnly:
1464  case frontend::EmitObj:
1465  case frontend::FixIt:
1466  case frontend::GenerateModule:
1467  case frontend::GeneratePCH:
1468  case frontend::GeneratePTH:
1469  case frontend::ParseSyntaxOnly:
1470  case frontend::ModuleFileInfo:
1471  case frontend::PluginAction:
1472  case frontend::PrintDeclContext:
1473  case frontend::RewriteObjC:
1474  case frontend::RewriteTest:
1475  case frontend::RunAnalysis:
1476  case frontend::MigrateSource:
1477    Opts.ShowCPP = 0;
1478    break;
1479
1480  case frontend::DumpRawTokens:
1481  case frontend::DumpTokens:
1482  case frontend::InitOnly:
1483  case frontend::PrintPreamble:
1484  case frontend::PrintPreprocessedInput:
1485  case frontend::RewriteMacros:
1486  case frontend::RunPreprocessorOnly:
1487    Opts.ShowCPP = !Args.hasArg(OPT_dM);
1488    break;
1489  }
1490
1491  Opts.ShowComments = Args.hasArg(OPT_C);
1492  Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1493  Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1494  Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1495  Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
1496}
1497
1498static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1499  using namespace options;
1500  Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1501  Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
1502  Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1503  Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
1504  Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1505  Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1506
1507  // Use the default target triple if unspecified.
1508  if (Opts.Triple.empty())
1509    Opts.Triple = llvm::sys::getDefaultTargetTriple();
1510}
1511
1512//
1513
1514bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1515                                        const char *const *ArgBegin,
1516                                        const char *const *ArgEnd,
1517                                        DiagnosticsEngine &Diags) {
1518  bool Success = true;
1519
1520  // Parse the arguments.
1521  OwningPtr<OptTable> Opts(createDriverOptTable());
1522  unsigned MissingArgIndex, MissingArgCount;
1523  OwningPtr<InputArgList> Args(
1524    Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1525
1526  // Check for missing argument error.
1527  if (MissingArgCount) {
1528    Diags.Report(diag::err_drv_missing_argument)
1529      << Args->getArgString(MissingArgIndex) << MissingArgCount;
1530    Success = false;
1531  }
1532
1533  // Issue errors on unknown arguments.
1534  for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1535         ie = Args->filtered_end(); it != ie; ++it) {
1536    Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
1537    Success = false;
1538  }
1539
1540  // Issue errors on arguments that are not valid for CC1.
1541  for (ArgList::iterator I = Args->begin(), E = Args->end();
1542       I != E; ++I) {
1543    if (!(*I)->getOption().hasFlag(options::CC1Option)) {
1544      Diags.Report(diag::err_drv_unknown_argument) << (*I)->getAsString(*Args);
1545      Success = false;
1546    }
1547  }
1548
1549  Success = ParseAnalyzerArgs(*Res.getAnalyzerOpts(), *Args, Diags) && Success;
1550  Success = ParseMigratorArgs(Res.getMigratorOpts(), *Args) && Success;
1551  ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1552  Success = ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, &Diags)
1553            && Success;
1554  ParseCommentArgs(Res.getLangOpts()->CommentOpts, *Args);
1555  ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
1556  // FIXME: We shouldn't have to pass the DashX option around here
1557  InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1558  Success = ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags)
1559            && Success;
1560  ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1561  if (DashX != IK_AST && DashX != IK_LLVM_IR) {
1562    ParseLangArgs(*Res.getLangOpts(), *Args, DashX, Diags);
1563    if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
1564      Res.getLangOpts()->ObjCExceptions = 1;
1565  }
1566  // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
1567  // PCH file and find the original header name. Remove the need to do that in
1568  // ParsePreprocessorArgs and remove the FileManager
1569  // parameters from the function and the "FileManager.h" #include.
1570  FileManager FileMgr(Res.getFileSystemOpts());
1571  ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
1572  ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args,
1573                              Res.getFrontendOpts().ProgramAction);
1574  ParseTargetArgs(Res.getTargetOpts(), *Args);
1575
1576  return Success;
1577}
1578
1579namespace {
1580
1581  class ModuleSignature {
1582    SmallVector<uint64_t, 16> Data;
1583    unsigned CurBit;
1584    uint64_t CurValue;
1585
1586  public:
1587    ModuleSignature() : CurBit(0), CurValue(0) { }
1588
1589    void add(uint64_t Value, unsigned Bits);
1590    void add(StringRef Value);
1591    void flush();
1592
1593    llvm::APInt getAsInteger() const;
1594  };
1595}
1596
1597void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
1598  CurValue |= Value << CurBit;
1599  if (CurBit + NumBits < 64) {
1600    CurBit += NumBits;
1601    return;
1602  }
1603
1604  // Add the current word.
1605  Data.push_back(CurValue);
1606
1607  if (CurBit)
1608    CurValue = Value >> (64-CurBit);
1609  else
1610    CurValue = 0;
1611  CurBit = (CurBit+NumBits) & 63;
1612}
1613
1614void ModuleSignature::flush() {
1615  if (CurBit == 0)
1616    return;
1617
1618  Data.push_back(CurValue);
1619  CurBit = 0;
1620  CurValue = 0;
1621}
1622
1623void ModuleSignature::add(StringRef Value) {
1624  for (StringRef::iterator I = Value.begin(), IEnd = Value.end(); I != IEnd;++I)
1625    add(*I, 8);
1626}
1627
1628llvm::APInt ModuleSignature::getAsInteger() const {
1629  return llvm::APInt(Data.size() * 64, Data);
1630}
1631
1632std::string CompilerInvocation::getModuleHash() const {
1633  // Note: For QoI reasons, the things we use as a hash here should all be
1634  // dumped via the -module-info flag.
1635  using llvm::hash_code;
1636  using llvm::hash_value;
1637  using llvm::hash_combine;
1638
1639  // Start the signature with the compiler version.
1640  // FIXME: We'd rather use something more cryptographically sound than
1641  // CityHash, but this will do for now.
1642  hash_code code = hash_value(getClangFullRepositoryVersion());
1643
1644  // Extend the signature with the language options
1645#define LANGOPT(Name, Bits, Default, Description) \
1646   code = hash_combine(code, LangOpts->Name);
1647#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
1648  code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
1649#define BENIGN_LANGOPT(Name, Bits, Default, Description)
1650#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
1651#include "clang/Basic/LangOptions.def"
1652
1653  // Extend the signature with the target options.
1654  code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
1655                      TargetOpts->ABI, TargetOpts->CXXABI,
1656                      TargetOpts->LinkerVersion);
1657  for (unsigned i = 0, n = TargetOpts->FeaturesAsWritten.size(); i != n; ++i)
1658    code = hash_combine(code, TargetOpts->FeaturesAsWritten[i]);
1659
1660  // Extend the signature with preprocessor options.
1661  const PreprocessorOptions &ppOpts = getPreprocessorOpts();
1662  const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
1663  code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
1664
1665  std::vector<StringRef> MacroDefs;
1666  for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
1667            I = getPreprocessorOpts().Macros.begin(),
1668         IEnd = getPreprocessorOpts().Macros.end();
1669       I != IEnd; ++I) {
1670    // If we're supposed to ignore this macro for the purposes of modules,
1671    // don't put it into the hash.
1672    if (!hsOpts.ModulesIgnoreMacros.empty()) {
1673      // Check whether we're ignoring this macro.
1674      StringRef MacroDef = I->first;
1675      if (hsOpts.ModulesIgnoreMacros.count(MacroDef.split('=').first))
1676        continue;
1677    }
1678
1679    code = hash_combine(code, I->first, I->second);
1680  }
1681
1682  // Extend the signature with the sysroot.
1683  code = hash_combine(code, hsOpts.Sysroot, hsOpts.UseBuiltinIncludes,
1684                      hsOpts.UseStandardSystemIncludes,
1685                      hsOpts.UseStandardCXXIncludes,
1686                      hsOpts.UseLibcxx);
1687
1688  return llvm::APInt(64, code).toString(36, /*Signed=*/false);
1689}
1690