CompilerInvocation.cpp revision ab297ccbcc51d5197d4ddb4e99b7bc8868d38314 
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/DriverDiagnostic.h"
15#include "clang/Driver/Options.h"
16#include "clang/Driver/Util.h"
17#include "clang/Frontend/LangStandard.h"
18#include "clang/Frontend/Utils.h"
19#include "clang/Lex/HeaderSearchOptions.h"
20#include "clang/Serialization/ASTReader.h"
21#include "llvm/ADT/Hashing.h"
22#include "llvm/ADT/OwningPtr.h"
23#include "llvm/ADT/SmallVector.h"
24#include "llvm/ADT/StringExtras.h"
25#include "llvm/ADT/StringSwitch.h"
26#include "llvm/ADT/Triple.h"
27#include "llvm/Option/Arg.h"
28#include "llvm/Option/ArgList.h"
29#include "llvm/Option/OptTable.h"
30#include "llvm/Option/Option.h"
31#include "llvm/Support/ErrorHandling.h"
32#include "llvm/Support/Host.h"
33#include "llvm/Support/Path.h"
34#include "llvm/Support/PathV1.h"
35#include "llvm/Support/system_error.h"
36#include <sys/stat.h>
37using namespace clang;
38
39//===----------------------------------------------------------------------===//
40// Initialization.
41//===----------------------------------------------------------------------===//
42
43CompilerInvocationBase::CompilerInvocationBase()
44  : LangOpts(new LangOptions()), TargetOpts(new TargetOptions()),
45    DiagnosticOpts(new DiagnosticOptions()),
46    HeaderSearchOpts(new HeaderSearchOptions()),
47    PreprocessorOpts(new PreprocessorOptions()) {}
48
49CompilerInvocationBase::CompilerInvocationBase(const CompilerInvocationBase &X)
50  : RefCountedBase<CompilerInvocation>(),
51    LangOpts(new LangOptions(*X.getLangOpts())),
52    TargetOpts(new TargetOptions(X.getTargetOpts())),
53    DiagnosticOpts(new DiagnosticOptions(X.getDiagnosticOpts())),
54    HeaderSearchOpts(new HeaderSearchOptions(X.getHeaderSearchOpts())),
55    PreprocessorOpts(new PreprocessorOptions(X.getPreprocessorOpts())) {}
56
57//===----------------------------------------------------------------------===//
58// Deserialization (from args)
59//===----------------------------------------------------------------------===//
60
61using namespace clang::driver;
62using namespace clang::driver::options;
63using namespace llvm::opt;
64
65//
66
67static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
68                                     DiagnosticsEngine &Diags) {
69  unsigned DefaultOpt = 0;
70  if (IK == IK_OpenCL && !Args.hasArg(OPT_cl_opt_disable))
71    DefaultOpt = 2;
72
73  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
74    if (A->getOption().matches(options::OPT_O0))
75      return 0;
76
77    if (A->getOption().matches(options::OPT_Ofast))
78      return 3;
79
80    assert (A->getOption().matches(options::OPT_O));
81
82    StringRef S(A->getValue());
83    if (S == "s" || S == "z" || S.empty())
84      return 2;
85
86    return getLastArgIntValue(Args, OPT_O, DefaultOpt, Diags);
87  }
88
89  return DefaultOpt;
90}
91
92static unsigned getOptimizationLevelSize(ArgList &Args) {
93  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
94    if (A->getOption().matches(options::OPT_O)) {
95      switch (A->getValue()[0]) {
96      default:
97        return 0;
98      case 's':
99        return 1;
100      case 'z':
101        return 2;
102      }
103    }
104  }
105  return 0;
106}
107
108static void addWarningArgs(ArgList &Args, std::vector<std::string> &Warnings) {
109  for (arg_iterator I = Args.filtered_begin(OPT_W_Group),
110         E = Args.filtered_end(); I != E; ++I) {
111    Arg *A = *I;
112    // If the argument is a pure flag, add its name (minus the "W" at the beginning)
113    // to the warning list. Else, add its value (for the OPT_W case).
114    if (A->getOption().getKind() == Option::FlagClass) {
115      Warnings.push_back(A->getOption().getName().substr(1));
116    } else {
117      for (unsigned Idx = 0, End = A->getNumValues();
118           Idx < End; ++Idx) {
119        StringRef V = A->getValue(Idx);
120        // "-Wl," and such are not warning options.
121        // FIXME: Should be handled by putting these in separate flags.
122        if (V.startswith("l,") || V.startswith("a,") || V.startswith("p,"))
123          continue;
124
125        Warnings.push_back(V);
126      }
127    }
128  }
129}
130
131static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
132                              DiagnosticsEngine &Diags) {
133  using namespace options;
134  bool Success = true;
135  if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
136    StringRef Name = A->getValue();
137    AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
138#define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
139      .Case(CMDFLAG, NAME##Model)
140#include "clang/StaticAnalyzer/Core/Analyses.def"
141      .Default(NumStores);
142    if (Value == NumStores) {
143      Diags.Report(diag::err_drv_invalid_value)
144        << A->getAsString(Args) << Name;
145      Success = false;
146    } else {
147      Opts.AnalysisStoreOpt = Value;
148    }
149  }
150
151  if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
152    StringRef Name = A->getValue();
153    AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
154#define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
155      .Case(CMDFLAG, NAME##Model)
156#include "clang/StaticAnalyzer/Core/Analyses.def"
157      .Default(NumConstraints);
158    if (Value == NumConstraints) {
159      Diags.Report(diag::err_drv_invalid_value)
160        << A->getAsString(Args) << Name;
161      Success = false;
162    } else {
163      Opts.AnalysisConstraintsOpt = Value;
164    }
165  }
166
167  if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
168    StringRef Name = A->getValue();
169    AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
170#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
171      .Case(CMDFLAG, PD_##NAME)
172#include "clang/StaticAnalyzer/Core/Analyses.def"
173      .Default(NUM_ANALYSIS_DIAG_CLIENTS);
174    if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
175      Diags.Report(diag::err_drv_invalid_value)
176        << A->getAsString(Args) << Name;
177      Success = false;
178    } else {
179      Opts.AnalysisDiagOpt = Value;
180    }
181  }
182
183  if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
184    StringRef Name = A->getValue();
185    AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
186#define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
187      .Case(CMDFLAG, NAME)
188#include "clang/StaticAnalyzer/Core/Analyses.def"
189      .Default(NumPurgeModes);
190    if (Value == NumPurgeModes) {
191      Diags.Report(diag::err_drv_invalid_value)
192        << A->getAsString(Args) << Name;
193      Success = false;
194    } else {
195      Opts.AnalysisPurgeOpt = Value;
196    }
197  }
198
199  if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
200    StringRef Name = A->getValue();
201    AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
202#define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
203      .Case(CMDFLAG, NAME)
204#include "clang/StaticAnalyzer/Core/Analyses.def"
205      .Default(NumInliningModes);
206    if (Value == NumInliningModes) {
207      Diags.Report(diag::err_drv_invalid_value)
208        << A->getAsString(Args) << Name;
209      Success = false;
210    } else {
211      Opts.InliningMode = Value;
212    }
213  }
214
215  Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
216  Opts.visualizeExplodedGraphWithGraphViz =
217    Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
218  Opts.visualizeExplodedGraphWithUbiGraph =
219    Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
220  Opts.NoRetryExhausted = Args.hasArg(OPT_analyzer_disable_retry_exhausted);
221  Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
222  Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
223  Opts.AnalyzeNestedBlocks =
224    Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
225  Opts.eagerlyAssumeBinOpBifurcation = Args.hasArg(OPT_analyzer_eagerly_assume);
226  Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
227  Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
228  Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
229  Opts.maxBlockVisitOnPath =
230      getLastArgIntValue(Args, OPT_analyzer_max_loop, 4, Diags);
231  Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
232  Opts.InlineMaxStackDepth =
233      getLastArgIntValue(Args, OPT_analyzer_inline_max_stack_depth,
234                         Opts.InlineMaxStackDepth, Diags);
235
236  Opts.CheckersControlList.clear();
237  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_checker,
238                                             OPT_analyzer_disable_checker),
239         ie = Args.filtered_end(); it != ie; ++it) {
240    const Arg *A = *it;
241    A->claim();
242    bool enable = (A->getOption().getID() == OPT_analyzer_checker);
243    // We can have a list of comma separated checker names, e.g:
244    // '-analyzer-checker=cocoa,unix'
245    StringRef checkerList = A->getValue();
246    SmallVector<StringRef, 4> checkers;
247    checkerList.split(checkers, ",");
248    for (unsigned i = 0, e = checkers.size(); i != e; ++i)
249      Opts.CheckersControlList.push_back(std::make_pair(checkers[i], enable));
250  }
251
252  // Go through the analyzer configuration options.
253  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_config),
254       ie = Args.filtered_end(); it != ie; ++it) {
255    const Arg *A = *it;
256    A->claim();
257    // We can have a list of comma separated config names, e.g:
258    // '-analyzer-config key1=val1,key2=val2'
259    StringRef configList = A->getValue();
260    SmallVector<StringRef, 4> configVals;
261    configList.split(configVals, ",");
262    for (unsigned i = 0, e = configVals.size(); i != e; ++i) {
263      StringRef key, val;
264      llvm::tie(key, val) = configVals[i].split("=");
265      if (val.empty()) {
266        Diags.Report(SourceLocation(),
267                     diag::err_analyzer_config_no_value) << configVals[i];
268        Success = false;
269        break;
270      }
271      if (val.find('=') != StringRef::npos) {
272        Diags.Report(SourceLocation(),
273                     diag::err_analyzer_config_multiple_values)
274          << configVals[i];
275        Success = false;
276        break;
277      }
278      Opts.Config[key] = val;
279    }
280  }
281
282  return Success;
283}
284
285static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
286  Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
287  Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
288  return true;
289}
290
291static void ParseCommentArgs(CommentOptions &Opts, ArgList &Args) {
292  Opts.BlockCommandNames = Args.getAllArgValues(OPT_fcomment_block_commands);
293  Opts.ParseAllComments = Args.hasArg(OPT_fparse_all_comments);
294}
295
296static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
297                             DiagnosticsEngine &Diags) {
298  using namespace options;
299  bool Success = true;
300
301  unsigned OptLevel = getOptimizationLevel(Args, IK, Diags);
302  if (OptLevel > 3) {
303    Diags.Report(diag::err_drv_invalid_value)
304      << Args.getLastArg(OPT_O)->getAsString(Args) << OptLevel;
305    OptLevel = 3;
306    Success = false;
307  }
308  Opts.OptimizationLevel = OptLevel;
309
310  // We must always run at least the always inlining pass.
311  Opts.setInlining(
312    (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
313                                 : CodeGenOptions::OnlyAlwaysInlining);
314  // -fno-inline-functions overrides OptimizationLevel > 1.
315  Opts.NoInline = Args.hasArg(OPT_fno_inline);
316  Opts.setInlining(Args.hasArg(OPT_fno_inline_functions) ?
317                     CodeGenOptions::OnlyAlwaysInlining : Opts.getInlining());
318
319  if (Args.hasArg(OPT_gline_tables_only)) {
320    Opts.setDebugInfo(CodeGenOptions::DebugLineTablesOnly);
321  } else if (Args.hasArg(OPT_g_Flag) || Args.hasArg(OPT_gdwarf_2) ||
322             Args.hasArg(OPT_gdwarf_3) || Args.hasArg(OPT_gdwarf_4)) {
323    if (Args.hasFlag(OPT_flimit_debug_info, OPT_fno_limit_debug_info, true))
324      Opts.setDebugInfo(CodeGenOptions::LimitedDebugInfo);
325    else
326      Opts.setDebugInfo(CodeGenOptions::FullDebugInfo);
327  }
328  Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
329  Opts.SplitDwarfFile = Args.getLastArgValue(OPT_split_dwarf_file);
330  if (Args.hasArg(OPT_gdwarf_2))
331    Opts.DwarfVersion = 2;
332  else if (Args.hasArg(OPT_gdwarf_3))
333    Opts.DwarfVersion = 3;
334  else if (Args.hasArg(OPT_gdwarf_4))
335    Opts.DwarfVersion = 4;
336  else if (Opts.getDebugInfo() != CodeGenOptions::NoDebugInfo)
337    // Default Dwarf version is 3 if we are generating debug information.
338    Opts.DwarfVersion = 3;
339
340  Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
341  Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
342  Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
343  Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
344    OPT_fuse_register_sized_bitfield_access);
345  Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
346  Opts.StructPathTBAA = Args.hasArg(OPT_struct_path_tbaa);
347  Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
348  Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
349  Opts.NoCommon = Args.hasArg(OPT_fno_common);
350  Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
351  Opts.OptimizeSize = getOptimizationLevelSize(Args);
352  Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
353                            Args.hasArg(OPT_ffreestanding));
354  Opts.UnrollLoops = Args.hasArg(OPT_funroll_loops) ||
355                     (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
356
357  Opts.Autolink = !Args.hasArg(OPT_fno_autolink);
358  Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
359  Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
360  Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);
361  Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
362  Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
363  Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
364  Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
365  Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
366  Opts.DisableFree = Args.hasArg(OPT_disable_free);
367  Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
368  Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
369  Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
370  Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
371  Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
372  Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
373                       Args.hasArg(OPT_cl_finite_math_only)||
374                       Args.hasArg(OPT_cl_fast_relaxed_math));
375  Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
376                       Args.hasArg(OPT_cl_finite_math_only)||
377                       Args.hasArg(OPT_cl_fast_relaxed_math));
378  Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
379  Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
380  Opts.NumRegisterParameters = getLastArgIntValue(Args, OPT_mregparm, 0, Diags);
381  Opts.NoGlobalMerge = Args.hasArg(OPT_mno_global_merge);
382  Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
383  Opts.EnableSegmentedStacks = Args.hasArg(OPT_split_stacks);
384  Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
385  Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
386  Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
387  Opts.NoDwarf2CFIAsm = Args.hasArg(OPT_fno_dwarf2_cfi_asm);
388  Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
389  Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
390  Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
391  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
392                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
393                      Args.hasArg(OPT_cl_fast_relaxed_math);
394  Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
395  Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
396  Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
397  Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
398
399  Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
400  Opts.DataSections = Args.hasArg(OPT_fdata_sections);
401
402  Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
403  Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
404  Opts.SanitizeRecover = !Args.hasArg(OPT_fno_sanitize_recover);
405
406  Opts.DisableGCov = Args.hasArg(OPT_test_coverage);
407  Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
408  Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
409  if (Opts.EmitGcovArcs || Opts.EmitGcovNotes) {
410  Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
411    Opts.CoverageExtraChecksum = Args.hasArg(OPT_coverage_cfg_checksum);
412    Opts.CoverageNoFunctionNamesInData =
413        Args.hasArg(OPT_coverage_no_function_names_in_data);
414    if (Args.hasArg(OPT_coverage_version_EQ)) {
415      StringRef CoverageVersion = Args.getLastArgValue(OPT_coverage_version_EQ);
416      if (CoverageVersion.size() != 4) {
417        Diags.Report(diag::err_drv_invalid_value)
418            << Args.getLastArg(OPT_coverage_version_EQ)->getAsString(Args)
419            << CoverageVersion;
420      } else {
421        memcpy(Opts.CoverageVersion, CoverageVersion.data(), 4);
422      }
423    }
424  }
425
426  Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
427  Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
428  Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
429  Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
430  Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
431  Opts.SanitizerBlacklistFile = Args.getLastArgValue(OPT_fsanitize_blacklist);
432  Opts.SanitizeMemoryTrackOrigins =
433    Args.hasArg(OPT_fsanitize_memory_track_origins);
434  Opts.SanitizeAddressZeroBaseShadow =
435    Args.hasArg(OPT_fsanitize_address_zero_base_shadow);
436  Opts.SanitizeUndefinedTrapOnError =
437    Args.hasArg(OPT_fsanitize_undefined_trap_on_error);
438  Opts.SSPBufferSize =
439      getLastArgIntValue(Args, OPT_stack_protector_buffer_size, 8, Diags);
440  Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
441  if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
442    StringRef Val = A->getValue();
443    unsigned StackAlignment = Opts.StackAlignment;
444    Val.getAsInteger(10, StackAlignment);
445    Opts.StackAlignment = StackAlignment;
446  }
447
448  if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
449    StringRef Name = A->getValue();
450    unsigned Method = llvm::StringSwitch<unsigned>(Name)
451      .Case("legacy", CodeGenOptions::Legacy)
452      .Case("non-legacy", CodeGenOptions::NonLegacy)
453      .Case("mixed", CodeGenOptions::Mixed)
454      .Default(~0U);
455    if (Method == ~0U) {
456      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
457      Success = false;
458    } else {
459      Opts.setObjCDispatchMethod(
460        static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
461    }
462  }
463
464  if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
465    StringRef Name = A->getValue();
466    unsigned Model = llvm::StringSwitch<unsigned>(Name)
467        .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
468        .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
469        .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
470        .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
471        .Default(~0U);
472    if (Model == ~0U) {
473      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
474      Success = false;
475    } else {
476      Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
477    }
478  }
479
480  if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
481    StringRef Val = A->getValue();
482    if (Val == "fast")
483      Opts.setFPContractMode(CodeGenOptions::FPC_Fast);
484    else if (Val == "on")
485      Opts.setFPContractMode(CodeGenOptions::FPC_On);
486    else if (Val == "off")
487      Opts.setFPContractMode(CodeGenOptions::FPC_Off);
488    else
489      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
490  }
491
492  if (Arg *A = Args.getLastArg(OPT_fpcc_struct_return, OPT_freg_struct_return)) {
493    if (A->getOption().matches(OPT_fpcc_struct_return)) {
494      Opts.setStructReturnConvention(CodeGenOptions::SRCK_OnStack);
495    } else {
496      assert(A->getOption().matches(OPT_freg_struct_return));
497      Opts.setStructReturnConvention(CodeGenOptions::SRCK_InRegs);
498    }
499  }
500
501  return Success;
502}
503
504static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
505                                      ArgList &Args) {
506  using namespace options;
507  Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
508  Opts.Targets = Args.getAllArgValues(OPT_MT);
509  Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
510  Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
511  Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
512  Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
513  Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
514  Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
515}
516
517bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
518                                DiagnosticsEngine *Diags) {
519  using namespace options;
520  bool Success = true;
521
522  Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
523  Opts.DiagnosticSerializationFile =
524    Args.getLastArgValue(OPT_diagnostic_serialized_file);
525  Opts.IgnoreWarnings = Args.hasArg(OPT_w);
526  Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
527  Opts.Pedantic = Args.hasArg(OPT_pedantic);
528  Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
529  Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
530  Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
531  Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
532                                 OPT_fno_show_column,
533                                 /*Default=*/true);
534  Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
535  Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
536  Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
537
538  // Default behavior is to not to show note include stacks.
539  Opts.ShowNoteIncludeStack = false;
540  if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
541                               OPT_fno_diagnostics_show_note_include_stack))
542    if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
543      Opts.ShowNoteIncludeStack = true;
544
545  StringRef ShowOverloads =
546    Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
547  if (ShowOverloads == "best")
548    Opts.setShowOverloads(Ovl_Best);
549  else if (ShowOverloads == "all")
550    Opts.setShowOverloads(Ovl_All);
551  else {
552    Success = false;
553    if (Diags)
554      Diags->Report(diag::err_drv_invalid_value)
555      << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
556      << ShowOverloads;
557  }
558
559  StringRef ShowCategory =
560    Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
561  if (ShowCategory == "none")
562    Opts.ShowCategories = 0;
563  else if (ShowCategory == "id")
564    Opts.ShowCategories = 1;
565  else if (ShowCategory == "name")
566    Opts.ShowCategories = 2;
567  else {
568    Success = false;
569    if (Diags)
570      Diags->Report(diag::err_drv_invalid_value)
571      << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
572      << ShowCategory;
573  }
574
575  StringRef Format =
576    Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
577  if (Format == "clang")
578    Opts.setFormat(DiagnosticOptions::Clang);
579  else if (Format == "msvc")
580    Opts.setFormat(DiagnosticOptions::Msvc);
581  else if (Format == "vi")
582    Opts.setFormat(DiagnosticOptions::Vi);
583  else {
584    Success = false;
585    if (Diags)
586      Diags->Report(diag::err_drv_invalid_value)
587      << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
588      << Format;
589  }
590
591  Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
592  Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
593  Opts.ShowPresumedLoc = !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
594  Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
595  Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
596  Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
597  Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
598  Opts.MacroBacktraceLimit =
599      getLastArgIntValue(Args, OPT_fmacro_backtrace_limit,
600                         DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
601  Opts.TemplateBacktraceLimit = getLastArgIntValue(
602      Args, OPT_ftemplate_backtrace_limit,
603      DiagnosticOptions::DefaultTemplateBacktraceLimit, Diags);
604  Opts.ConstexprBacktraceLimit = getLastArgIntValue(
605      Args, OPT_fconstexpr_backtrace_limit,
606      DiagnosticOptions::DefaultConstexprBacktraceLimit, Diags);
607  Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
608                                    DiagnosticOptions::DefaultTabStop, Diags);
609  if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
610    Opts.TabStop = DiagnosticOptions::DefaultTabStop;
611    if (Diags)
612      Diags->Report(diag::warn_ignoring_ftabstop_value)
613      << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
614  }
615  Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
616  addWarningArgs(Args, Opts.Warnings);
617
618  return Success;
619}
620
621static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
622  Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
623}
624
625static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
626                                   DiagnosticsEngine &Diags) {
627  using namespace options;
628  Opts.ProgramAction = frontend::ParseSyntaxOnly;
629  if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
630    switch (A->getOption().getID()) {
631    default:
632      llvm_unreachable("Invalid option in group!");
633    case OPT_ast_list:
634      Opts.ProgramAction = frontend::ASTDeclList; break;
635    case OPT_ast_dump:
636      Opts.ProgramAction = frontend::ASTDump; break;
637    case OPT_ast_dump_xml:
638      Opts.ProgramAction = frontend::ASTDumpXML; break;
639    case OPT_ast_print:
640      Opts.ProgramAction = frontend::ASTPrint; break;
641    case OPT_ast_view:
642      Opts.ProgramAction = frontend::ASTView; break;
643    case OPT_dump_raw_tokens:
644      Opts.ProgramAction = frontend::DumpRawTokens; break;
645    case OPT_dump_tokens:
646      Opts.ProgramAction = frontend::DumpTokens; break;
647    case OPT_S:
648      Opts.ProgramAction = frontend::EmitAssembly; break;
649    case OPT_emit_llvm_bc:
650      Opts.ProgramAction = frontend::EmitBC; break;
651    case OPT_emit_html:
652      Opts.ProgramAction = frontend::EmitHTML; break;
653    case OPT_emit_llvm:
654      Opts.ProgramAction = frontend::EmitLLVM; break;
655    case OPT_emit_llvm_only:
656      Opts.ProgramAction = frontend::EmitLLVMOnly; break;
657    case OPT_emit_codegen_only:
658      Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
659    case OPT_emit_obj:
660      Opts.ProgramAction = frontend::EmitObj; break;
661    case OPT_fixit_EQ:
662      Opts.FixItSuffix = A->getValue();
663      // fall-through!
664    case OPT_fixit:
665      Opts.ProgramAction = frontend::FixIt; break;
666    case OPT_emit_module:
667      Opts.ProgramAction = frontend::GenerateModule; break;
668    case OPT_emit_pch:
669      Opts.ProgramAction = frontend::GeneratePCH; break;
670    case OPT_emit_pth:
671      Opts.ProgramAction = frontend::GeneratePTH; break;
672    case OPT_init_only:
673      Opts.ProgramAction = frontend::InitOnly; break;
674    case OPT_fsyntax_only:
675      Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
676    case OPT_module_file_info:
677      Opts.ProgramAction = frontend::ModuleFileInfo; break;
678    case OPT_print_decl_contexts:
679      Opts.ProgramAction = frontend::PrintDeclContext; break;
680    case OPT_print_preamble:
681      Opts.ProgramAction = frontend::PrintPreamble; break;
682    case OPT_E:
683      Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
684    case OPT_rewrite_macros:
685      Opts.ProgramAction = frontend::RewriteMacros; break;
686    case OPT_rewrite_objc:
687      Opts.ProgramAction = frontend::RewriteObjC; break;
688    case OPT_rewrite_test:
689      Opts.ProgramAction = frontend::RewriteTest; break;
690    case OPT_analyze:
691      Opts.ProgramAction = frontend::RunAnalysis; break;
692    case OPT_migrate:
693      Opts.ProgramAction = frontend::MigrateSource; break;
694    case OPT_Eonly:
695      Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
696    }
697  }
698
699  if (const Arg* A = Args.getLastArg(OPT_plugin)) {
700    Opts.Plugins.push_back(A->getValue(0));
701    Opts.ProgramAction = frontend::PluginAction;
702    Opts.ActionName = A->getValue();
703
704    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
705           end = Args.filtered_end(); it != end; ++it) {
706      if ((*it)->getValue(0) == Opts.ActionName)
707        Opts.PluginArgs.push_back((*it)->getValue(1));
708    }
709  }
710
711  Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
712  Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
713  for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
714    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
715           end = Args.filtered_end(); it != end; ++it) {
716      if ((*it)->getValue(0) == Opts.AddPluginActions[i])
717        Opts.AddPluginArgs[i].push_back((*it)->getValue(1));
718    }
719  }
720
721  if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
722    Opts.CodeCompletionAt =
723      ParsedSourceLocation::FromString(A->getValue());
724    if (Opts.CodeCompletionAt.FileName.empty())
725      Diags.Report(diag::err_drv_invalid_value)
726        << A->getAsString(Args) << A->getValue();
727  }
728  Opts.DisableFree = Args.hasArg(OPT_disable_free);
729
730  Opts.OutputFile = Args.getLastArgValue(OPT_o);
731  Opts.Plugins = Args.getAllArgValues(OPT_load);
732  Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
733  Opts.ShowHelp = Args.hasArg(OPT_help);
734  Opts.ShowStats = Args.hasArg(OPT_print_stats);
735  Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
736  Opts.ShowVersion = Args.hasArg(OPT_version);
737  Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
738  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
739  Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
740  Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
741  Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
742  Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
743  Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
744  Opts.ASTDumpLookups = Args.hasArg(OPT_ast_dump_lookups);
745  Opts.UseGlobalModuleIndex = !Args.hasArg(OPT_fno_modules_global_index);
746  Opts.GenerateGlobalModuleIndex = Opts.UseGlobalModuleIndex;
747
748  Opts.CodeCompleteOpts.IncludeMacros
749    = Args.hasArg(OPT_code_completion_macros);
750  Opts.CodeCompleteOpts.IncludeCodePatterns
751    = Args.hasArg(OPT_code_completion_patterns);
752  Opts.CodeCompleteOpts.IncludeGlobals
753    = !Args.hasArg(OPT_no_code_completion_globals);
754  Opts.CodeCompleteOpts.IncludeBriefComments
755    = Args.hasArg(OPT_code_completion_brief_comments);
756
757  Opts.OverrideRecordLayoutsFile
758    = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
759  if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
760                                     OPT_arcmt_modify,
761                                     OPT_arcmt_migrate)) {
762    switch (A->getOption().getID()) {
763    default:
764      llvm_unreachable("missed a case");
765    case OPT_arcmt_check:
766      Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
767      break;
768    case OPT_arcmt_modify:
769      Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
770      break;
771    case OPT_arcmt_migrate:
772      Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
773      break;
774    }
775  }
776  Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
777  Opts.ARCMTMigrateReportOut
778    = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
779  Opts.ARCMTMigrateEmitARCErrors
780    = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
781
782  if (Args.hasArg(OPT_objcmt_migrate_literals))
783    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
784  if (Args.hasArg(OPT_objcmt_migrate_subscripting))
785    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
786
787  if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
788      Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
789    Diags.Report(diag::err_drv_argument_not_allowed_with)
790      << "ARC migration" << "ObjC migration";
791  }
792
793  InputKind DashX = IK_None;
794  if (const Arg *A = Args.getLastArg(OPT_x)) {
795    DashX = llvm::StringSwitch<InputKind>(A->getValue())
796      .Case("c", IK_C)
797      .Case("cl", IK_OpenCL)
798      .Case("cuda", IK_CUDA)
799      .Case("c++", IK_CXX)
800      .Case("objective-c", IK_ObjC)
801      .Case("objective-c++", IK_ObjCXX)
802      .Case("cpp-output", IK_PreprocessedC)
803      .Case("assembler-with-cpp", IK_Asm)
804      .Case("c++-cpp-output", IK_PreprocessedCXX)
805      .Case("objective-c-cpp-output", IK_PreprocessedObjC)
806      .Case("objc-cpp-output", IK_PreprocessedObjC)
807      .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
808      .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
809      .Case("c-header", IK_C)
810      .Case("cl-header", IK_OpenCL)
811      .Case("objective-c-header", IK_ObjC)
812      .Case("c++-header", IK_CXX)
813      .Case("objective-c++-header", IK_ObjCXX)
814      .Cases("ast", "pcm", IK_AST)
815      .Case("ir", IK_LLVM_IR)
816      .Default(IK_None);
817    if (DashX == IK_None)
818      Diags.Report(diag::err_drv_invalid_value)
819        << A->getAsString(Args) << A->getValue();
820  }
821
822  // '-' is the default input if none is given.
823  std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
824  Opts.Inputs.clear();
825  if (Inputs.empty())
826    Inputs.push_back("-");
827  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
828    InputKind IK = DashX;
829    if (IK == IK_None) {
830      IK = FrontendOptions::getInputKindForExtension(
831        StringRef(Inputs[i]).rsplit('.').second);
832      // FIXME: Remove this hack.
833      if (i == 0)
834        DashX = IK;
835    }
836    Opts.Inputs.push_back(FrontendInputFile(Inputs[i], IK));
837  }
838
839  return DashX;
840}
841
842std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
843                                                 void *MainAddr) {
844  llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
845
846  if (!P.isEmpty()) {
847    P.eraseComponent();  // Remove /clang from foo/bin/clang
848    P.eraseComponent();  // Remove /bin   from foo/bin
849
850    // Get foo/lib/clang/<version>/include
851    P.appendComponent("lib");
852    P.appendComponent("clang");
853    P.appendComponent(CLANG_VERSION_STRING);
854  }
855
856  return P.str();
857}
858
859static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
860  using namespace options;
861  Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
862  Opts.Verbose = Args.hasArg(OPT_v);
863  Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
864  Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
865  Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
866  if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
867    Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
868  Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
869  Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodules_cache_path);
870  Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
871  Opts.ModuleCachePruneInterval =
872      getLastArgIntValue(Args, OPT_fmodules_prune_interval, 7 * 24 * 60 * 60);
873  Opts.ModuleCachePruneAfter =
874      getLastArgIntValue(Args, OPT_fmodules_prune_after, 31 * 24 * 60 * 60);
875  for (arg_iterator it = Args.filtered_begin(OPT_fmodules_ignore_macro),
876                    ie = Args.filtered_end();
877       it != ie; ++it) {
878    StringRef MacroDef = (*it)->getValue();
879    Opts.ModulesIgnoreMacros.insert(MacroDef.split('=').first);
880  }
881
882  // Add -I..., -F..., and -index-header-map options in order.
883  bool IsIndexHeaderMap = false;
884  for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F,
885                                             OPT_index_header_map),
886       ie = Args.filtered_end(); it != ie; ++it) {
887    if ((*it)->getOption().matches(OPT_index_header_map)) {
888      // -index-header-map applies to the next -I or -F.
889      IsIndexHeaderMap = true;
890      continue;
891    }
892
893    frontend::IncludeDirGroup Group
894      = IsIndexHeaderMap? frontend::IndexHeaderMap : frontend::Angled;
895
896    Opts.AddPath((*it)->getValue(), Group,
897                 /*IsFramework=*/ (*it)->getOption().matches(OPT_F), true);
898    IsIndexHeaderMap = false;
899  }
900
901  // Add -iprefix/-iwithprefix/-iwithprefixbefore options.
902  StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
903  for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
904                                             OPT_iwithprefixbefore),
905         ie = Args.filtered_end(); it != ie; ++it) {
906    const Arg *A = *it;
907    if (A->getOption().matches(OPT_iprefix))
908      Prefix = A->getValue();
909    else if (A->getOption().matches(OPT_iwithprefix))
910      Opts.AddPath(Prefix.str() + A->getValue(),
911                   frontend::After, false, true);
912    else
913      Opts.AddPath(Prefix.str() + A->getValue(),
914                   frontend::Angled, false, true);
915  }
916
917  for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
918         ie = Args.filtered_end(); it != ie; ++it)
919    Opts.AddPath((*it)->getValue(), frontend::After, false, true);
920  for (arg_iterator it = Args.filtered_begin(OPT_iquote),
921         ie = Args.filtered_end(); it != ie; ++it)
922    Opts.AddPath((*it)->getValue(), frontend::Quoted, false, true);
923  for (arg_iterator it = Args.filtered_begin(OPT_isystem,
924         OPT_iwithsysroot), ie = Args.filtered_end(); it != ie; ++it)
925    Opts.AddPath((*it)->getValue(), frontend::System, false,
926                 !(*it)->getOption().matches(OPT_iwithsysroot));
927  for (arg_iterator it = Args.filtered_begin(OPT_iframework),
928         ie = Args.filtered_end(); it != ie; ++it)
929    Opts.AddPath((*it)->getValue(), frontend::System, true, true);
930
931  // Add the paths for the various language specific isystem flags.
932  for (arg_iterator it = Args.filtered_begin(OPT_c_isystem),
933       ie = Args.filtered_end(); it != ie; ++it)
934    Opts.AddPath((*it)->getValue(), frontend::CSystem, false, true);
935  for (arg_iterator it = Args.filtered_begin(OPT_cxx_isystem),
936       ie = Args.filtered_end(); it != ie; ++it)
937    Opts.AddPath((*it)->getValue(), frontend::CXXSystem, false, true);
938  for (arg_iterator it = Args.filtered_begin(OPT_objc_isystem),
939       ie = Args.filtered_end(); it != ie; ++it)
940    Opts.AddPath((*it)->getValue(), frontend::ObjCSystem, false,true);
941  for (arg_iterator it = Args.filtered_begin(OPT_objcxx_isystem),
942       ie = Args.filtered_end(); it != ie; ++it)
943    Opts.AddPath((*it)->getValue(), frontend::ObjCXXSystem, false, true);
944
945  // Add the internal paths from a driver that detects standard include paths.
946  for (arg_iterator I = Args.filtered_begin(OPT_internal_isystem,
947                                            OPT_internal_externc_isystem),
948                    E = Args.filtered_end();
949       I != E; ++I) {
950    frontend::IncludeDirGroup Group = frontend::System;
951    if ((*I)->getOption().matches(OPT_internal_externc_isystem))
952      Group = frontend::ExternCSystem;
953    Opts.AddPath((*I)->getValue(), Group, false, true);
954  }
955
956  // Add the path prefixes which are implicitly treated as being system headers.
957  for (arg_iterator I = Args.filtered_begin(OPT_isystem_prefix,
958                                            OPT_ino_system_prefix),
959                    E = Args.filtered_end();
960       I != E; ++I)
961    Opts.AddSystemHeaderPrefix((*I)->getValue(),
962                               (*I)->getOption().matches(OPT_isystem_prefix));
963}
964
965void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
966                                         LangStandard::Kind LangStd) {
967  // Set some properties which depend solely on the input kind; it would be nice
968  // to move these to the language standard, and have the driver resolve the
969  // input kind + language standard.
970  if (IK == IK_Asm) {
971    Opts.AsmPreprocessor = 1;
972  } else if (IK == IK_ObjC ||
973             IK == IK_ObjCXX ||
974             IK == IK_PreprocessedObjC ||
975             IK == IK_PreprocessedObjCXX) {
976    Opts.ObjC1 = Opts.ObjC2 = 1;
977  }
978
979  if (LangStd == LangStandard::lang_unspecified) {
980    // Based on the base language, pick one.
981    switch (IK) {
982    case IK_None:
983    case IK_AST:
984    case IK_LLVM_IR:
985      llvm_unreachable("Invalid input kind!");
986    case IK_OpenCL:
987      LangStd = LangStandard::lang_opencl;
988      break;
989    case IK_CUDA:
990      LangStd = LangStandard::lang_cuda;
991      break;
992    case IK_Asm:
993    case IK_C:
994    case IK_PreprocessedC:
995    case IK_ObjC:
996    case IK_PreprocessedObjC:
997      LangStd = LangStandard::lang_gnu99;
998      break;
999    case IK_CXX:
1000    case IK_PreprocessedCXX:
1001    case IK_ObjCXX:
1002    case IK_PreprocessedObjCXX:
1003      LangStd = LangStandard::lang_gnucxx98;
1004      break;
1005    }
1006  }
1007
1008  const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1009  Opts.LineComment = Std.hasLineComments();
1010  Opts.C99 = Std.isC99();
1011  Opts.C11 = Std.isC11();
1012  Opts.CPlusPlus = Std.isCPlusPlus();
1013  Opts.CPlusPlus11 = Std.isCPlusPlus11();
1014  Opts.CPlusPlus1y = Std.isCPlusPlus1y();
1015  Opts.Digraphs = Std.hasDigraphs();
1016  Opts.GNUMode = Std.isGNUMode();
1017  Opts.GNUInline = !Std.isC99();
1018  Opts.HexFloats = Std.hasHexFloats();
1019  Opts.ImplicitInt = Std.hasImplicitInt();
1020
1021  // Set OpenCL Version.
1022  if (LangStd == LangStandard::lang_opencl) {
1023    Opts.OpenCL = 1;
1024    Opts.OpenCLVersion = 100;
1025  }
1026  else if (LangStd == LangStandard::lang_opencl11) {
1027      Opts.OpenCL = 1;
1028      Opts.OpenCLVersion = 110;
1029  }
1030  else if (LangStd == LangStandard::lang_opencl12) {
1031    Opts.OpenCL = 1;
1032    Opts.OpenCLVersion = 120;
1033  }
1034
1035  // OpenCL has some additional defaults.
1036  if (Opts.OpenCL) {
1037    Opts.AltiVec = 0;
1038    Opts.CXXOperatorNames = 1;
1039    Opts.LaxVectorConversions = 0;
1040    Opts.DefaultFPContract = 1;
1041    Opts.NativeHalfType = 1;
1042  }
1043
1044  if (LangStd == LangStandard::lang_cuda)
1045    Opts.CUDA = 1;
1046
1047  // OpenCL and C++ both have bool, true, false keywords.
1048  Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1049
1050  // C++ has wchar_t keyword.
1051  Opts.WChar = Opts.CPlusPlus;
1052
1053  Opts.GNUKeywords = Opts.GNUMode;
1054  Opts.CXXOperatorNames = Opts.CPlusPlus;
1055
1056  // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1057  // is specified, or -std is set to a conforming mode.
1058  Opts.Trigraphs = !Opts.GNUMode;
1059
1060  Opts.DollarIdents = !Opts.AsmPreprocessor;
1061}
1062
1063/// Attempt to parse a visibility value out of the given argument.
1064static Visibility parseVisibility(Arg *arg, ArgList &args,
1065                                  DiagnosticsEngine &diags) {
1066  StringRef value = arg->getValue();
1067  if (value == "default") {
1068    return DefaultVisibility;
1069  } else if (value == "hidden") {
1070    return HiddenVisibility;
1071  } else if (value == "protected") {
1072    // FIXME: diagnose if target does not support protected visibility
1073    return ProtectedVisibility;
1074  }
1075
1076  diags.Report(diag::err_drv_invalid_value)
1077    << arg->getAsString(args) << value;
1078  return DefaultVisibility;
1079}
1080
1081static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1082                          DiagnosticsEngine &Diags) {
1083  // FIXME: Cleanup per-file based stuff.
1084  LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1085  if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1086    LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1087#define LANGSTANDARD(id, name, desc, features) \
1088      .Case(name, LangStandard::lang_##id)
1089#include "clang/Frontend/LangStandards.def"
1090      .Default(LangStandard::lang_unspecified);
1091    if (LangStd == LangStandard::lang_unspecified)
1092      Diags.Report(diag::err_drv_invalid_value)
1093        << A->getAsString(Args) << A->getValue();
1094    else {
1095      // Valid standard, check to make sure language and standard are compatable.
1096      const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1097      switch (IK) {
1098      case IK_C:
1099      case IK_ObjC:
1100      case IK_PreprocessedC:
1101      case IK_PreprocessedObjC:
1102        if (!(Std.isC89() || Std.isC99()))
1103          Diags.Report(diag::err_drv_argument_not_allowed_with)
1104            << A->getAsString(Args) << "C/ObjC";
1105        break;
1106      case IK_CXX:
1107      case IK_ObjCXX:
1108      case IK_PreprocessedCXX:
1109      case IK_PreprocessedObjCXX:
1110        if (!Std.isCPlusPlus())
1111          Diags.Report(diag::err_drv_argument_not_allowed_with)
1112            << A->getAsString(Args) << "C++/ObjC++";
1113        break;
1114      case IK_OpenCL:
1115        if (!Std.isC99())
1116          Diags.Report(diag::err_drv_argument_not_allowed_with)
1117            << A->getAsString(Args) << "OpenCL";
1118        break;
1119      case IK_CUDA:
1120        if (!Std.isCPlusPlus())
1121          Diags.Report(diag::err_drv_argument_not_allowed_with)
1122            << A->getAsString(Args) << "CUDA";
1123        break;
1124      default:
1125        break;
1126      }
1127    }
1128  }
1129
1130  // -cl-std only applies for OpenCL language standards.
1131  // Override the -std option in this case.
1132  if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1133    LangStandard::Kind OpenCLLangStd
1134    = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1135    .Case("CL", LangStandard::lang_opencl)
1136    .Case("CL1.1", LangStandard::lang_opencl11)
1137    .Case("CL1.2", LangStandard::lang_opencl12)
1138    .Default(LangStandard::lang_unspecified);
1139
1140    if (OpenCLLangStd == LangStandard::lang_unspecified) {
1141      Diags.Report(diag::err_drv_invalid_value)
1142      << A->getAsString(Args) << A->getValue();
1143    }
1144    else
1145      LangStd = OpenCLLangStd;
1146  }
1147
1148  CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1149
1150  // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1151  // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1152  // while a subset (the non-C++ GNU keywords) is provided by GCC's
1153  // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1154  // name, as it doesn't seem a useful distinction.
1155  Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1156                                  Opts.GNUKeywords);
1157
1158  if (Args.hasArg(OPT_fno_operator_names))
1159    Opts.CXXOperatorNames = 0;
1160
1161  if (Opts.ObjC1) {
1162    if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1163      StringRef value = arg->getValue();
1164      if (Opts.ObjCRuntime.tryParse(value))
1165        Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1166    }
1167
1168    if (Args.hasArg(OPT_fobjc_gc_only))
1169      Opts.setGC(LangOptions::GCOnly);
1170    else if (Args.hasArg(OPT_fobjc_gc))
1171      Opts.setGC(LangOptions::HybridGC);
1172    else if (Args.hasArg(OPT_fobjc_arc)) {
1173      Opts.ObjCAutoRefCount = 1;
1174      if (!Opts.ObjCRuntime.allowsARC())
1175        Diags.Report(diag::err_arc_unsupported_on_runtime);
1176
1177      // Only set ObjCARCWeak if ARC is enabled.
1178      if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1179        Opts.ObjCARCWeak = 1;
1180      else
1181        Opts.ObjCARCWeak = Opts.ObjCRuntime.allowsWeak();
1182    }
1183
1184    if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1185      Opts.ObjCInferRelatedResultType = 0;
1186  }
1187
1188  if (Args.hasArg(OPT_fgnu89_inline))
1189    Opts.GNUInline = 1;
1190
1191  if (Args.hasArg(OPT_fapple_kext)) {
1192    if (!Opts.CPlusPlus)
1193      Diags.Report(diag::warn_c_kext);
1194    else
1195      Opts.AppleKext = 1;
1196  }
1197
1198  if (Args.hasArg(OPT_print_ivar_layout))
1199    Opts.ObjCGCBitmapPrint = 1;
1200  if (Args.hasArg(OPT_fno_constant_cfstrings))
1201    Opts.NoConstantCFStrings = 1;
1202
1203  if (Args.hasArg(OPT_faltivec))
1204    Opts.AltiVec = 1;
1205
1206  if (Args.hasArg(OPT_pthread))
1207    Opts.POSIXThreads = 1;
1208
1209  // The value-visibility mode defaults to "default".
1210  if (Arg *visOpt = Args.getLastArg(OPT_fvisibility)) {
1211    Opts.setValueVisibilityMode(parseVisibility(visOpt, Args, Diags));
1212  } else {
1213    Opts.setValueVisibilityMode(DefaultVisibility);
1214  }
1215
1216  // The type-visibility mode defaults to the value-visibility mode.
1217  if (Arg *typeVisOpt = Args.getLastArg(OPT_ftype_visibility)) {
1218    Opts.setTypeVisibilityMode(parseVisibility(typeVisOpt, Args, Diags));
1219  } else {
1220    Opts.setTypeVisibilityMode(Opts.getValueVisibilityMode());
1221  }
1222
1223  if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1224    Opts.InlineVisibilityHidden = 1;
1225
1226  if (Args.hasArg(OPT_ftrapv)) {
1227    Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1228    // Set the handler, if one is specified.
1229    Opts.OverflowHandler =
1230        Args.getLastArgValue(OPT_ftrapv_handler);
1231  }
1232  else if (Args.hasArg(OPT_fwrapv))
1233    Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1234
1235  if (Args.hasArg(OPT_trigraphs))
1236    Opts.Trigraphs = 1;
1237
1238  Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1239                                   OPT_fno_dollars_in_identifiers,
1240                                   Opts.DollarIdents);
1241  Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1242  Opts.MicrosoftExt
1243    = Args.hasArg(OPT_fms_extensions) || Args.hasArg(OPT_fms_compatibility);
1244  Opts.MicrosoftMode = Args.hasArg(OPT_fms_compatibility);
1245  Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
1246  Opts.MSCVersion = getLastArgIntValue(Args, OPT_fmsc_version, 0, Diags);
1247  Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1248  Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1249  Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
1250                                   Opts.ConstStrings);
1251  if (Args.hasArg(OPT_fno_lax_vector_conversions))
1252    Opts.LaxVectorConversions = 0;
1253  if (Args.hasArg(OPT_fno_threadsafe_statics))
1254    Opts.ThreadsafeStatics = 0;
1255  Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1256  Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
1257  Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
1258  Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1259  Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
1260
1261  Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1262  Opts.Blocks = Args.hasArg(OPT_fblocks);
1263  Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
1264  Opts.Modules = Args.hasArg(OPT_fmodules);
1265  Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1266  Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
1267  Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1268  Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1269  Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1270  Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1271  Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1272  Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1273  Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1274  Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1275  Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1276  Opts.InstantiationDepth =
1277      getLastArgIntValue(Args, OPT_ftemplate_depth, 256, Diags);
1278  Opts.ConstexprCallDepth =
1279      getLastArgIntValue(Args, OPT_fconstexpr_depth, 512, Diags);
1280  Opts.ConstexprStepLimit =
1281      getLastArgIntValue(Args, OPT_fconstexpr_steps, 1048576, Diags);
1282  Opts.BracketDepth = getLastArgIntValue(Args, OPT_fbracket_depth, 256, Diags);
1283  Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
1284  Opts.NumLargeByValueCopy =
1285      getLastArgIntValue(Args, OPT_Wlarge_by_value_copy_EQ, 0, Diags);
1286  Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
1287  Opts.ObjCConstantStringClass =
1288    Args.getLastArgValue(OPT_fconstant_string_class);
1289  Opts.ObjCDefaultSynthProperties =
1290    Args.hasArg(OPT_fobjc_default_synthesize_properties);
1291  Opts.EncodeExtendedBlockSig =
1292    Args.hasArg(OPT_fencode_extended_block_signature);
1293  Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1294  Opts.PackStruct = getLastArgIntValue(Args, OPT_fpack_struct_EQ, 0, Diags);
1295  Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
1296  Opts.PIELevel = getLastArgIntValue(Args, OPT_pie_level, 0, Diags);
1297  Opts.Static = Args.hasArg(OPT_static_define);
1298  Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
1299  Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
1300                        || Args.hasArg(OPT_fdump_record_layouts);
1301  Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1302  Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1303  Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1304  Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
1305  Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
1306  Opts.MRTD = Args.hasArg(OPT_mrtd);
1307  Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
1308  Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
1309  Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
1310  Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
1311  Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
1312  Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
1313  Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
1314  Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
1315
1316  // Check if -fopenmp is specified.
1317  Opts.OpenMP = Args.hasArg(OPT_fopenmp);
1318
1319  // Record whether the __DEPRECATED define was requested.
1320  Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
1321                                 OPT_fno_deprecated_macro,
1322                                 Opts.Deprecated);
1323
1324  // FIXME: Eliminate this dependency.
1325  unsigned Opt = getOptimizationLevel(Args, IK, Diags),
1326       OptSize = getOptimizationLevelSize(Args);
1327  Opts.Optimize = Opt != 0;
1328  Opts.OptimizeSize = OptSize != 0;
1329
1330  // This is the __NO_INLINE__ define, which just depends on things like the
1331  // optimization level and -fno-inline, not actually whether the backend has
1332  // inlining enabled.
1333  Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
1334
1335  Opts.FastMath = Args.hasArg(OPT_ffast_math);
1336  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only);
1337
1338  Opts.RetainCommentsFromSystemHeaders =
1339      Args.hasArg(OPT_fretain_comments_from_system_headers);
1340
1341  unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
1342  switch (SSP) {
1343  default:
1344    Diags.Report(diag::err_drv_invalid_value)
1345      << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1346    break;
1347  case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
1348  case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
1349  case 2: Opts.setStackProtector(LangOptions::SSPReq); break;
1350  }
1351
1352  // Parse -fsanitize= arguments.
1353  std::vector<std::string> Sanitizers = Args.getAllArgValues(OPT_fsanitize_EQ);
1354  for (unsigned I = 0, N = Sanitizers.size(); I != N; ++I) {
1355    // Since the Opts.Sanitize* values are bitfields, it's a little tricky to
1356    // efficiently map string values to them. Perform the mapping indirectly:
1357    // convert strings to enumerated values, then switch over the enum to set
1358    // the right bitfield value.
1359    enum Sanitizer {
1360#define SANITIZER(NAME, ID) \
1361      ID,
1362#include "clang/Basic/Sanitizers.def"
1363      Unknown
1364    };
1365    switch (llvm::StringSwitch<unsigned>(Sanitizers[I])
1366#define SANITIZER(NAME, ID) \
1367              .Case(NAME, ID)
1368#include "clang/Basic/Sanitizers.def"
1369              .Default(Unknown)) {
1370#define SANITIZER(NAME, ID) \
1371    case ID: \
1372      Opts.Sanitize.ID = true; \
1373      break;
1374#include "clang/Basic/Sanitizers.def"
1375
1376    case Unknown:
1377      Diags.Report(diag::err_drv_invalid_value)
1378        << "-fsanitize=" << Sanitizers[I];
1379      break;
1380    }
1381  }
1382}
1383
1384static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1385                                  FileManager &FileMgr,
1386                                  DiagnosticsEngine &Diags) {
1387  using namespace options;
1388  Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1389  Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1390  if (const Arg *A = Args.getLastArg(OPT_token_cache))
1391      Opts.TokenCache = A->getValue();
1392  else
1393    Opts.TokenCache = Opts.ImplicitPTHInclude;
1394  Opts.UsePredefines = !Args.hasArg(OPT_undef);
1395  Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1396  Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1397
1398  Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
1399  for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
1400         ie = Args.filtered_end(); it != ie; ++it) {
1401    const Arg *A = *it;
1402    Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
1403  }
1404
1405  if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1406    StringRef Value(A->getValue());
1407    size_t Comma = Value.find(',');
1408    unsigned Bytes = 0;
1409    unsigned EndOfLine = 0;
1410
1411    if (Comma == StringRef::npos ||
1412        Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1413        Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1414      Diags.Report(diag::err_drv_preamble_format);
1415    else {
1416      Opts.PrecompiledPreambleBytes.first = Bytes;
1417      Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1418    }
1419  }
1420
1421  // Add macros from the command line.
1422  for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1423         ie = Args.filtered_end(); it != ie; ++it) {
1424    if ((*it)->getOption().matches(OPT_D))
1425      Opts.addMacroDef((*it)->getValue());
1426    else
1427      Opts.addMacroUndef((*it)->getValue());
1428  }
1429
1430  Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1431
1432  // Add the ordered list of -includes.
1433  for (arg_iterator it = Args.filtered_begin(OPT_include),
1434         ie = Args.filtered_end(); it != ie; ++it) {
1435    const Arg *A = *it;
1436    Opts.Includes.push_back(A->getValue());
1437  }
1438
1439  for (arg_iterator it = Args.filtered_begin(OPT_chain_include),
1440         ie = Args.filtered_end(); it != ie; ++it) {
1441    const Arg *A = *it;
1442    Opts.ChainedIncludes.push_back(A->getValue());
1443  }
1444
1445  // Include 'altivec.h' if -faltivec option present
1446  if (Args.hasArg(OPT_faltivec))
1447    Opts.Includes.push_back("altivec.h");
1448
1449  for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1450         ie = Args.filtered_end(); it != ie; ++it) {
1451    const Arg *A = *it;
1452    std::pair<StringRef,StringRef> Split =
1453      StringRef(A->getValue()).split(';');
1454
1455    if (Split.second.empty()) {
1456      Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1457      continue;
1458    }
1459
1460    Opts.addRemappedFile(Split.first, Split.second);
1461  }
1462
1463  if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
1464    StringRef Name = A->getValue();
1465    unsigned Library = llvm::StringSwitch<unsigned>(Name)
1466      .Case("libc++", ARCXX_libcxx)
1467      .Case("libstdc++", ARCXX_libstdcxx)
1468      .Case("none", ARCXX_nolib)
1469      .Default(~0U);
1470    if (Library == ~0U)
1471      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1472    else
1473      Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
1474  }
1475}
1476
1477static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1478                                        ArgList &Args,
1479                                        frontend::ActionKind Action) {
1480  using namespace options;
1481
1482  switch (Action) {
1483  case frontend::ASTDeclList:
1484  case frontend::ASTDump:
1485  case frontend::ASTDumpXML:
1486  case frontend::ASTPrint:
1487  case frontend::ASTView:
1488  case frontend::EmitAssembly:
1489  case frontend::EmitBC:
1490  case frontend::EmitHTML:
1491  case frontend::EmitLLVM:
1492  case frontend::EmitLLVMOnly:
1493  case frontend::EmitCodeGenOnly:
1494  case frontend::EmitObj:
1495  case frontend::FixIt:
1496  case frontend::GenerateModule:
1497  case frontend::GeneratePCH:
1498  case frontend::GeneratePTH:
1499  case frontend::ParseSyntaxOnly:
1500  case frontend::ModuleFileInfo:
1501  case frontend::PluginAction:
1502  case frontend::PrintDeclContext:
1503  case frontend::RewriteObjC:
1504  case frontend::RewriteTest:
1505  case frontend::RunAnalysis:
1506  case frontend::MigrateSource:
1507    Opts.ShowCPP = 0;
1508    break;
1509
1510  case frontend::DumpRawTokens:
1511  case frontend::DumpTokens:
1512  case frontend::InitOnly:
1513  case frontend::PrintPreamble:
1514  case frontend::PrintPreprocessedInput:
1515  case frontend::RewriteMacros:
1516  case frontend::RunPreprocessorOnly:
1517    Opts.ShowCPP = !Args.hasArg(OPT_dM);
1518    break;
1519  }
1520
1521  Opts.ShowComments = Args.hasArg(OPT_C);
1522  Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1523  Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1524  Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1525  Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
1526}
1527
1528static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1529  using namespace options;
1530  Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1531  Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
1532  Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1533  Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
1534  Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1535  Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1536
1537  // Use the default target triple if unspecified.
1538  if (Opts.Triple.empty())
1539    Opts.Triple = llvm::sys::getDefaultTargetTriple();
1540}
1541
1542//
1543
1544bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1545                                        const char *const *ArgBegin,
1546                                        const char *const *ArgEnd,
1547                                        DiagnosticsEngine &Diags) {
1548  bool Success = true;
1549
1550  // Parse the arguments.
1551  OwningPtr<OptTable> Opts(createDriverOptTable());
1552  unsigned MissingArgIndex, MissingArgCount;
1553  OwningPtr<InputArgList> Args(
1554    Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1555
1556  // Check for missing argument error.
1557  if (MissingArgCount) {
1558    Diags.Report(diag::err_drv_missing_argument)
1559      << Args->getArgString(MissingArgIndex) << MissingArgCount;
1560    Success = false;
1561  }
1562
1563  // Issue errors on unknown arguments.
1564  for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1565         ie = Args->filtered_end(); it != ie; ++it) {
1566    Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
1567    Success = false;
1568  }
1569
1570  // Issue errors on arguments that are not valid for CC1.
1571  for (ArgList::iterator I = Args->begin(), E = Args->end();
1572       I != E; ++I) {
1573    if ((*I)->getOption().matches(options::OPT_INPUT))
1574      continue;
1575    if (!(*I)->getOption().hasFlag(options::CC1Option)) {
1576      Diags.Report(diag::err_drv_unknown_argument) << (*I)->getAsString(*Args);
1577      Success = false;
1578    }
1579  }
1580
1581  Success = ParseAnalyzerArgs(*Res.getAnalyzerOpts(), *Args, Diags) && Success;
1582  Success = ParseMigratorArgs(Res.getMigratorOpts(), *Args) && Success;
1583  ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1584  Success = ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, &Diags)
1585            && Success;
1586  ParseCommentArgs(Res.getLangOpts()->CommentOpts, *Args);
1587  ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
1588  // FIXME: We shouldn't have to pass the DashX option around here
1589  InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1590  Success = ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags)
1591            && Success;
1592  ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1593  if (DashX != IK_AST && DashX != IK_LLVM_IR) {
1594    ParseLangArgs(*Res.getLangOpts(), *Args, DashX, Diags);
1595    if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
1596      Res.getLangOpts()->ObjCExceptions = 1;
1597  }
1598  // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
1599  // PCH file and find the original header name. Remove the need to do that in
1600  // ParsePreprocessorArgs and remove the FileManager
1601  // parameters from the function and the "FileManager.h" #include.
1602  FileManager FileMgr(Res.getFileSystemOpts());
1603  ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
1604  ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args,
1605                              Res.getFrontendOpts().ProgramAction);
1606  ParseTargetArgs(Res.getTargetOpts(), *Args);
1607
1608  return Success;
1609}
1610
1611namespace {
1612
1613  class ModuleSignature {
1614    SmallVector<uint64_t, 16> Data;
1615    unsigned CurBit;
1616    uint64_t CurValue;
1617
1618  public:
1619    ModuleSignature() : CurBit(0), CurValue(0) { }
1620
1621    void add(uint64_t Value, unsigned Bits);
1622    void add(StringRef Value);
1623    void flush();
1624
1625    llvm::APInt getAsInteger() const;
1626  };
1627}
1628
1629void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
1630  CurValue |= Value << CurBit;
1631  if (CurBit + NumBits < 64) {
1632    CurBit += NumBits;
1633    return;
1634  }
1635
1636  // Add the current word.
1637  Data.push_back(CurValue);
1638
1639  if (CurBit)
1640    CurValue = Value >> (64-CurBit);
1641  else
1642    CurValue = 0;
1643  CurBit = (CurBit+NumBits) & 63;
1644}
1645
1646void ModuleSignature::flush() {
1647  if (CurBit == 0)
1648    return;
1649
1650  Data.push_back(CurValue);
1651  CurBit = 0;
1652  CurValue = 0;
1653}
1654
1655void ModuleSignature::add(StringRef Value) {
1656  for (StringRef::iterator I = Value.begin(), IEnd = Value.end(); I != IEnd;++I)
1657    add(*I, 8);
1658}
1659
1660llvm::APInt ModuleSignature::getAsInteger() const {
1661  return llvm::APInt(Data.size() * 64, Data);
1662}
1663
1664std::string CompilerInvocation::getModuleHash() const {
1665  // Note: For QoI reasons, the things we use as a hash here should all be
1666  // dumped via the -module-info flag.
1667  using llvm::hash_code;
1668  using llvm::hash_value;
1669  using llvm::hash_combine;
1670
1671  // Start the signature with the compiler version.
1672  // FIXME: We'd rather use something more cryptographically sound than
1673  // CityHash, but this will do for now.
1674  hash_code code = hash_value(getClangFullRepositoryVersion());
1675
1676  // Extend the signature with the language options
1677#define LANGOPT(Name, Bits, Default, Description) \
1678   code = hash_combine(code, LangOpts->Name);
1679#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
1680  code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
1681#define BENIGN_LANGOPT(Name, Bits, Default, Description)
1682#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
1683#include "clang/Basic/LangOptions.def"
1684
1685  // Extend the signature with the target options.
1686  code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
1687                      TargetOpts->ABI, TargetOpts->CXXABI,
1688                      TargetOpts->LinkerVersion);
1689  for (unsigned i = 0, n = TargetOpts->FeaturesAsWritten.size(); i != n; ++i)
1690    code = hash_combine(code, TargetOpts->FeaturesAsWritten[i]);
1691
1692  // Extend the signature with preprocessor options.
1693  const PreprocessorOptions &ppOpts = getPreprocessorOpts();
1694  const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
1695  code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
1696
1697  std::vector<StringRef> MacroDefs;
1698  for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
1699            I = getPreprocessorOpts().Macros.begin(),
1700         IEnd = getPreprocessorOpts().Macros.end();
1701       I != IEnd; ++I) {
1702    // If we're supposed to ignore this macro for the purposes of modules,
1703    // don't put it into the hash.
1704    if (!hsOpts.ModulesIgnoreMacros.empty()) {
1705      // Check whether we're ignoring this macro.
1706      StringRef MacroDef = I->first;
1707      if (hsOpts.ModulesIgnoreMacros.count(MacroDef.split('=').first))
1708        continue;
1709    }
1710
1711    code = hash_combine(code, I->first, I->second);
1712  }
1713
1714  // Extend the signature with the sysroot.
1715  code = hash_combine(code, hsOpts.Sysroot, hsOpts.UseBuiltinIncludes,
1716                      hsOpts.UseStandardSystemIncludes,
1717                      hsOpts.UseStandardCXXIncludes,
1718                      hsOpts.UseLibcxx);
1719
1720  // Darwin-specific hack: if we have a sysroot, use the contents and
1721  // modification time of
1722  //   $sysroot/System/Library/CoreServices/SystemVersion.plist
1723  // as part of the module hash.
1724  if (!hsOpts.Sysroot.empty()) {
1725    llvm::OwningPtr<llvm::MemoryBuffer> buffer;
1726    SmallString<128> systemVersionFile;
1727    systemVersionFile += hsOpts.Sysroot;
1728    llvm::sys::path::append(systemVersionFile, "System");
1729    llvm::sys::path::append(systemVersionFile, "Library");
1730    llvm::sys::path::append(systemVersionFile, "CoreServices");
1731    llvm::sys::path::append(systemVersionFile, "SystemVersion.plist");
1732    if (!llvm::MemoryBuffer::getFile(systemVersionFile, buffer)) {
1733      code = hash_combine(code, buffer.get()->getBuffer());
1734
1735      struct stat statBuf;
1736      if (stat(systemVersionFile.c_str(), &statBuf) == 0)
1737        code = hash_combine(code, statBuf.st_mtime);
1738    }
1739  }
1740
1741  return llvm::APInt(64, code).toString(36, /*Signed=*/false);
1742}
1743
1744namespace clang {
1745
1746// Declared in clang/Frontend/Utils.h.
1747int getLastArgIntValue(const ArgList &Args, OptSpecifier Id, int Default,
1748                       DiagnosticsEngine *Diags) {
1749  int Res = Default;
1750  if (Arg *A = Args.getLastArg(Id)) {
1751    if (StringRef(A->getValue()).getAsInteger(10, Res)) {
1752      if (Diags)
1753        Diags->Report(diag::err_drv_invalid_int_value) << A->getAsString(Args)
1754                                                       << A->getValue();
1755    }
1756  }
1757  return Res;
1758}
1759}
1760