CompilerInvocation.cpp revision 19dbb20ac4371fae3190379a7e7bd467af3c00aa 
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_ipa)) {
192    StringRef Name = A->getValue();
193    AnalysisIPAMode Value = llvm::StringSwitch<AnalysisIPAMode>(Name)
194#define ANALYSIS_IPA(NAME, CMDFLAG, DESC) \
195      .Case(CMDFLAG, NAME)
196#include "clang/StaticAnalyzer/Core/Analyses.def"
197      .Default(NumIPAModes);
198    if (Value == NumIPAModes) {
199      Diags.Report(diag::err_drv_invalid_value)
200        << A->getAsString(Args) << Name;
201      Success = false;
202    } else {
203      Opts.IPAMode = Value;
204    }
205  }
206
207  if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
208    StringRef Name = A->getValue();
209    AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
210#define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
211      .Case(CMDFLAG, NAME)
212#include "clang/StaticAnalyzer/Core/Analyses.def"
213      .Default(NumInliningModes);
214    if (Value == NumInliningModes) {
215      Diags.Report(diag::err_drv_invalid_value)
216        << A->getAsString(Args) << Name;
217      Success = false;
218    } else {
219      Opts.InliningMode = Value;
220    }
221  }
222
223  Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
224  Opts.visualizeExplodedGraphWithGraphViz =
225    Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
226  Opts.visualizeExplodedGraphWithUbiGraph =
227    Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
228  Opts.NoRetryExhausted = Args.hasArg(OPT_analyzer_disable_retry_exhausted);
229  Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
230  Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
231  Opts.AnalyzeNestedBlocks =
232    Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
233  Opts.eagerlyAssumeBinOpBifurcation = Args.hasArg(OPT_analyzer_eagerly_assume);
234  Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
235  Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
236  Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
237  Opts.MaxNodes = Args.getLastArgIntValue(OPT_analyzer_max_nodes, 150000,Diags);
238  Opts.maxBlockVisitOnPath = Args.getLastArgIntValue(OPT_analyzer_max_loop, 4, Diags);
239  Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
240  Opts.InlineMaxStackDepth =
241    Args.getLastArgIntValue(OPT_analyzer_inline_max_stack_depth,
242                            Opts.InlineMaxStackDepth, Diags);
243  Opts.InlineMaxFunctionSize =
244    Args.getLastArgIntValue(OPT_analyzer_inline_max_function_size,
245                            Opts.InlineMaxFunctionSize, Diags);
246
247  Opts.CheckersControlList.clear();
248  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_checker,
249                                             OPT_analyzer_disable_checker),
250         ie = Args.filtered_end(); it != ie; ++it) {
251    const Arg *A = *it;
252    A->claim();
253    bool enable = (A->getOption().getID() == OPT_analyzer_checker);
254    // We can have a list of comma separated checker names, e.g:
255    // '-analyzer-checker=cocoa,unix'
256    StringRef checkerList = A->getValue();
257    SmallVector<StringRef, 4> checkers;
258    checkerList.split(checkers, ",");
259    for (unsigned i = 0, e = checkers.size(); i != e; ++i)
260      Opts.CheckersControlList.push_back(std::make_pair(checkers[i], enable));
261  }
262
263  // Go through the analyzer configuration options.
264  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_config),
265       ie = Args.filtered_end(); it != ie; ++it) {
266    const Arg *A = *it;
267    A->claim();
268    // We can have a list of comma separated config names, e.g:
269    // '-analyzer-config key1=val1,key2=val2'
270    StringRef configList = A->getValue();
271    SmallVector<StringRef, 4> configVals;
272    configList.split(configVals, ",");
273    for (unsigned i = 0, e = configVals.size(); i != e; ++i) {
274      StringRef key, val;
275      llvm::tie(key, val) = configVals[i].split("=");
276      if (val.empty()) {
277        Diags.Report(SourceLocation(),
278                     diag::err_analyzer_config_no_value) << configVals[i];
279        Success = false;
280        break;
281      }
282      if (val.find('=') != StringRef::npos) {
283        Diags.Report(SourceLocation(),
284                     diag::err_analyzer_config_multiple_values)
285          << configVals[i];
286        Success = false;
287        break;
288      }
289      Opts.Config[key] = val;
290    }
291  }
292
293  return Success;
294}
295
296static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
297  Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
298  Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
299  return true;
300}
301
302static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
303                             DiagnosticsEngine &Diags) {
304  using namespace options;
305  bool Success = true;
306
307  unsigned OptLevel = getOptimizationLevel(Args, IK, Diags);
308  if (OptLevel > 3) {
309    Diags.Report(diag::err_drv_invalid_value)
310      << Args.getLastArg(OPT_O)->getAsString(Args) << OptLevel;
311    OptLevel = 3;
312    Success = false;
313  }
314  Opts.OptimizationLevel = OptLevel;
315
316  // We must always run at least the always inlining pass.
317  Opts.setInlining(
318    (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
319                                 : CodeGenOptions::OnlyAlwaysInlining);
320  // -fno-inline-functions overrides OptimizationLevel > 1.
321  Opts.NoInline = Args.hasArg(OPT_fno_inline);
322  Opts.setInlining(Args.hasArg(OPT_fno_inline_functions) ?
323                     CodeGenOptions::OnlyAlwaysInlining : Opts.getInlining());
324
325  if (Args.hasArg(OPT_gline_tables_only)) {
326    Opts.setDebugInfo(CodeGenOptions::DebugLineTablesOnly);
327  } else if (Args.hasArg(OPT_g_Flag)) {
328    if (Args.hasFlag(OPT_flimit_debug_info, OPT_fno_limit_debug_info, true))
329      Opts.setDebugInfo(CodeGenOptions::LimitedDebugInfo);
330    else
331      Opts.setDebugInfo(CodeGenOptions::FullDebugInfo);
332  }
333  Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
334
335  Opts.ModulesAutolink = Args.hasArg(OPT_fmodules_autolink);
336  Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
337  Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
338  Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
339  Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
340    OPT_fuse_register_sized_bitfield_access);
341  Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
342  Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
343  Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
344  Opts.NoCommon = Args.hasArg(OPT_fno_common);
345  Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
346  Opts.OptimizeSize = getOptimizationLevelSize(Args, IK, Diags);
347  Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
348                            Args.hasArg(OPT_ffreestanding));
349  Opts.UnrollLoops = Args.hasArg(OPT_funroll_loops) ||
350                     (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
351
352  Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
353  Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
354  Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);
355  Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
356  Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
357  Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
358  Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
359  Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
360  Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
361  Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
362  Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
363  Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
364  Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
365  Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
366                       Args.hasArg(OPT_cl_finite_math_only)||
367                       Args.hasArg(OPT_cl_fast_relaxed_math));
368  Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
369                       Args.hasArg(OPT_cl_finite_math_only)||
370                       Args.hasArg(OPT_cl_fast_relaxed_math));
371  Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
372  Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
373  Opts.NumRegisterParameters = Args.getLastArgIntValue(OPT_mregparm, 0, Diags);
374  Opts.NoGlobalMerge = Args.hasArg(OPT_mno_global_merge);
375  Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
376  Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
377  Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
378  Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
379  Opts.NoDwarf2CFIAsm = Args.hasArg(OPT_fno_dwarf2_cfi_asm);
380  Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
381  Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
382  Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
383  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
384                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
385                      Args.hasArg(OPT_cl_fast_relaxed_math);
386  Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
387  Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
388  Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
389  Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
390
391  Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
392  Opts.DataSections = Args.hasArg(OPT_fdata_sections);
393
394  Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
395  Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
396  Opts.SanitizeRecover = !Args.hasArg(OPT_fno_sanitize_recover);
397
398  Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
399  Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
400  Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
401  Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
402  Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
403  Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
404  Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
405  Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
406  Opts.SanitizerBlacklistFile = Args.getLastArgValue(OPT_fsanitize_blacklist);
407  Opts.SanitizeMemoryTrackOrigins =
408    Args.hasArg(OPT_fsanitize_memory_track_origins);
409  Opts.SanitizeAddressZeroBaseShadow =
410    Args.hasArg(OPT_fsanitize_address_zero_base_shadow);
411  Opts.SSPBufferSize =
412    Args.getLastArgIntValue(OPT_stack_protector_buffer_size, 8, Diags);
413  Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
414  if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
415    StringRef Val = A->getValue();
416    unsigned StackAlignment = Opts.StackAlignment;
417    Val.getAsInteger(10, StackAlignment);
418    Opts.StackAlignment = StackAlignment;
419  }
420
421  if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
422    StringRef Name = A->getValue();
423    unsigned Method = llvm::StringSwitch<unsigned>(Name)
424      .Case("legacy", CodeGenOptions::Legacy)
425      .Case("non-legacy", CodeGenOptions::NonLegacy)
426      .Case("mixed", CodeGenOptions::Mixed)
427      .Default(~0U);
428    if (Method == ~0U) {
429      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
430      Success = false;
431    } else {
432      Opts.setObjCDispatchMethod(
433        static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
434    }
435  }
436
437  if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
438    StringRef Name = A->getValue();
439    unsigned Model = llvm::StringSwitch<unsigned>(Name)
440        .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
441        .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
442        .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
443        .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
444        .Default(~0U);
445    if (Model == ~0U) {
446      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
447      Success = false;
448    } else {
449      Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
450    }
451  }
452
453  if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
454    StringRef Val = A->getValue();
455    if (Val == "fast")
456      Opts.setFPContractMode(CodeGenOptions::FPC_Fast);
457    else if (Val == "on")
458      Opts.setFPContractMode(CodeGenOptions::FPC_On);
459    else if (Val == "off")
460      Opts.setFPContractMode(CodeGenOptions::FPC_Off);
461    else
462      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
463  }
464
465  return Success;
466}
467
468static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
469                                      ArgList &Args) {
470  using namespace options;
471  Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
472  Opts.Targets = Args.getAllArgValues(OPT_MT);
473  Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
474  Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
475  Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
476  Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
477  Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
478  Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
479}
480
481bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
482                                DiagnosticsEngine *Diags) {
483  using namespace options;
484  bool Success = true;
485
486  Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
487  Opts.DiagnosticSerializationFile =
488    Args.getLastArgValue(OPT_diagnostic_serialized_file);
489  Opts.IgnoreWarnings = Args.hasArg(OPT_w);
490  Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
491  Opts.Pedantic = Args.hasArg(OPT_pedantic);
492  Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
493  Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
494  Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
495  Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
496                                 OPT_fno_show_column,
497                                 /*Default=*/true);
498  Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
499  Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
500  Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
501
502  // Default behavior is to not to show note include stacks.
503  Opts.ShowNoteIncludeStack = false;
504  if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
505                               OPT_fno_diagnostics_show_note_include_stack))
506    if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
507      Opts.ShowNoteIncludeStack = true;
508
509  StringRef ShowOverloads =
510    Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
511  if (ShowOverloads == "best")
512    Opts.setShowOverloads(Ovl_Best);
513  else if (ShowOverloads == "all")
514    Opts.setShowOverloads(Ovl_All);
515  else {
516    Success = false;
517    if (Diags)
518      Diags->Report(diag::err_drv_invalid_value)
519      << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
520      << ShowOverloads;
521  }
522
523  StringRef ShowCategory =
524    Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
525  if (ShowCategory == "none")
526    Opts.ShowCategories = 0;
527  else if (ShowCategory == "id")
528    Opts.ShowCategories = 1;
529  else if (ShowCategory == "name")
530    Opts.ShowCategories = 2;
531  else {
532    Success = false;
533    if (Diags)
534      Diags->Report(diag::err_drv_invalid_value)
535      << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
536      << ShowCategory;
537  }
538
539  StringRef Format =
540    Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
541  if (Format == "clang")
542    Opts.setFormat(DiagnosticOptions::Clang);
543  else if (Format == "msvc")
544    Opts.setFormat(DiagnosticOptions::Msvc);
545  else if (Format == "vi")
546    Opts.setFormat(DiagnosticOptions::Vi);
547  else {
548    Success = false;
549    if (Diags)
550      Diags->Report(diag::err_drv_invalid_value)
551      << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
552      << Format;
553  }
554
555  Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
556  Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
557  Opts.ShowPresumedLoc = !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
558  Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
559  Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
560  Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
561  Opts.ErrorLimit = Args.getLastArgIntValue(OPT_ferror_limit, 0, Diags);
562  Opts.MacroBacktraceLimit
563    = Args.getLastArgIntValue(OPT_fmacro_backtrace_limit,
564                         DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
565  Opts.TemplateBacktraceLimit
566    = Args.getLastArgIntValue(OPT_ftemplate_backtrace_limit,
567                         DiagnosticOptions::DefaultTemplateBacktraceLimit,
568                         Diags);
569  Opts.ConstexprBacktraceLimit
570    = Args.getLastArgIntValue(OPT_fconstexpr_backtrace_limit,
571                         DiagnosticOptions::DefaultConstexprBacktraceLimit,
572                         Diags);
573  Opts.TabStop = Args.getLastArgIntValue(OPT_ftabstop,
574                                    DiagnosticOptions::DefaultTabStop, Diags);
575  if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
576    Opts.TabStop = DiagnosticOptions::DefaultTabStop;
577    if (Diags)
578      Diags->Report(diag::warn_ignoring_ftabstop_value)
579      << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
580  }
581  Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
582  addWarningArgs(Args, Opts.Warnings);
583
584  return Success;
585}
586
587static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
588  Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
589}
590
591static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
592                                   DiagnosticsEngine &Diags) {
593  using namespace options;
594  Opts.ProgramAction = frontend::ParseSyntaxOnly;
595  if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
596    switch (A->getOption().getID()) {
597    default:
598      llvm_unreachable("Invalid option in group!");
599    case OPT_ast_list:
600      Opts.ProgramAction = frontend::ASTDeclList; break;
601    case OPT_ast_dump:
602      Opts.ProgramAction = frontend::ASTDump; break;
603    case OPT_ast_dump_xml:
604      Opts.ProgramAction = frontend::ASTDumpXML; break;
605    case OPT_ast_print:
606      Opts.ProgramAction = frontend::ASTPrint; break;
607    case OPT_ast_view:
608      Opts.ProgramAction = frontend::ASTView; break;
609    case OPT_dump_raw_tokens:
610      Opts.ProgramAction = frontend::DumpRawTokens; break;
611    case OPT_dump_tokens:
612      Opts.ProgramAction = frontend::DumpTokens; break;
613    case OPT_S:
614      Opts.ProgramAction = frontend::EmitAssembly; break;
615    case OPT_emit_llvm_bc:
616      Opts.ProgramAction = frontend::EmitBC; break;
617    case OPT_emit_html:
618      Opts.ProgramAction = frontend::EmitHTML; break;
619    case OPT_emit_llvm:
620      Opts.ProgramAction = frontend::EmitLLVM; break;
621    case OPT_emit_llvm_only:
622      Opts.ProgramAction = frontend::EmitLLVMOnly; break;
623    case OPT_emit_codegen_only:
624      Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
625    case OPT_emit_obj:
626      Opts.ProgramAction = frontend::EmitObj; break;
627    case OPT_fixit_EQ:
628      Opts.FixItSuffix = A->getValue();
629      // fall-through!
630    case OPT_fixit:
631      Opts.ProgramAction = frontend::FixIt; break;
632    case OPT_emit_module:
633      Opts.ProgramAction = frontend::GenerateModule; break;
634    case OPT_emit_pch:
635      Opts.ProgramAction = frontend::GeneratePCH; break;
636    case OPT_emit_pth:
637      Opts.ProgramAction = frontend::GeneratePTH; break;
638    case OPT_init_only:
639      Opts.ProgramAction = frontend::InitOnly; break;
640    case OPT_fsyntax_only:
641      Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
642    case OPT_print_decl_contexts:
643      Opts.ProgramAction = frontend::PrintDeclContext; break;
644    case OPT_print_preamble:
645      Opts.ProgramAction = frontend::PrintPreamble; break;
646    case OPT_E:
647      Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
648    case OPT_rewrite_macros:
649      Opts.ProgramAction = frontend::RewriteMacros; break;
650    case OPT_rewrite_objc:
651      Opts.ProgramAction = frontend::RewriteObjC; break;
652    case OPT_rewrite_test:
653      Opts.ProgramAction = frontend::RewriteTest; break;
654    case OPT_analyze:
655      Opts.ProgramAction = frontend::RunAnalysis; break;
656    case OPT_migrate:
657      Opts.ProgramAction = frontend::MigrateSource; break;
658    case OPT_Eonly:
659      Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
660    }
661  }
662
663  if (const Arg* A = Args.getLastArg(OPT_plugin)) {
664    Opts.Plugins.push_back(A->getValue(0));
665    Opts.ProgramAction = frontend::PluginAction;
666    Opts.ActionName = A->getValue();
667
668    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
669           end = Args.filtered_end(); it != end; ++it) {
670      if ((*it)->getValue(0) == Opts.ActionName)
671        Opts.PluginArgs.push_back((*it)->getValue(1));
672    }
673  }
674
675  Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
676  Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
677  for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
678    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
679           end = Args.filtered_end(); it != end; ++it) {
680      if ((*it)->getValue(0) == Opts.AddPluginActions[i])
681        Opts.AddPluginArgs[i].push_back((*it)->getValue(1));
682    }
683  }
684
685  if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
686    Opts.CodeCompletionAt =
687      ParsedSourceLocation::FromString(A->getValue());
688    if (Opts.CodeCompletionAt.FileName.empty())
689      Diags.Report(diag::err_drv_invalid_value)
690        << A->getAsString(Args) << A->getValue();
691  }
692  Opts.DisableFree = Args.hasArg(OPT_disable_free);
693
694  Opts.OutputFile = Args.getLastArgValue(OPT_o);
695  Opts.Plugins = Args.getAllArgValues(OPT_load);
696  Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
697  Opts.ShowHelp = Args.hasArg(OPT_help);
698  Opts.ShowStats = Args.hasArg(OPT_print_stats);
699  Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
700  Opts.ShowVersion = Args.hasArg(OPT_version);
701  Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
702  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
703  Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
704  Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
705  Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
706  Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
707  Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
708
709  Opts.CodeCompleteOpts.IncludeMacros
710    = Args.hasArg(OPT_code_completion_macros);
711  Opts.CodeCompleteOpts.IncludeCodePatterns
712    = Args.hasArg(OPT_code_completion_patterns);
713  Opts.CodeCompleteOpts.IncludeGlobals
714    = !Args.hasArg(OPT_no_code_completion_globals);
715  Opts.CodeCompleteOpts.IncludeBriefComments
716    = Args.hasArg(OPT_code_completion_brief_comments);
717
718  Opts.OverrideRecordLayoutsFile
719    = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
720  if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
721                                     OPT_arcmt_modify,
722                                     OPT_arcmt_migrate)) {
723    switch (A->getOption().getID()) {
724    default:
725      llvm_unreachable("missed a case");
726    case OPT_arcmt_check:
727      Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
728      break;
729    case OPT_arcmt_modify:
730      Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
731      break;
732    case OPT_arcmt_migrate:
733      Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
734      break;
735    }
736  }
737  Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
738  Opts.ARCMTMigrateReportOut
739    = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
740  Opts.ARCMTMigrateEmitARCErrors
741    = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
742
743  if (Args.hasArg(OPT_objcmt_migrate_literals))
744    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
745  if (Args.hasArg(OPT_objcmt_migrate_subscripting))
746    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
747
748  if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
749      Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
750    Diags.Report(diag::err_drv_argument_not_allowed_with)
751      << "ARC migration" << "ObjC migration";
752  }
753
754  InputKind DashX = IK_None;
755  if (const Arg *A = Args.getLastArg(OPT_x)) {
756    DashX = llvm::StringSwitch<InputKind>(A->getValue())
757      .Case("c", IK_C)
758      .Case("cl", IK_OpenCL)
759      .Case("cuda", IK_CUDA)
760      .Case("c++", IK_CXX)
761      .Case("objective-c", IK_ObjC)
762      .Case("objective-c++", IK_ObjCXX)
763      .Case("cpp-output", IK_PreprocessedC)
764      .Case("assembler-with-cpp", IK_Asm)
765      .Case("c++-cpp-output", IK_PreprocessedCXX)
766      .Case("objective-c-cpp-output", IK_PreprocessedObjC)
767      .Case("objc-cpp-output", IK_PreprocessedObjC)
768      .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
769      .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
770      .Case("c-header", IK_C)
771      .Case("cl-header", IK_OpenCL)
772      .Case("objective-c-header", IK_ObjC)
773      .Case("c++-header", IK_CXX)
774      .Case("objective-c++-header", IK_ObjCXX)
775      .Case("ast", IK_AST)
776      .Case("ir", IK_LLVM_IR)
777      .Default(IK_None);
778    if (DashX == IK_None)
779      Diags.Report(diag::err_drv_invalid_value)
780        << A->getAsString(Args) << A->getValue();
781  }
782
783  // '-' is the default input if none is given.
784  std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
785  Opts.Inputs.clear();
786  if (Inputs.empty())
787    Inputs.push_back("-");
788  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
789    InputKind IK = DashX;
790    if (IK == IK_None) {
791      IK = FrontendOptions::getInputKindForExtension(
792        StringRef(Inputs[i]).rsplit('.').second);
793      // FIXME: Remove this hack.
794      if (i == 0)
795        DashX = IK;
796    }
797    Opts.Inputs.push_back(FrontendInputFile(Inputs[i], IK));
798  }
799
800  return DashX;
801}
802
803std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
804                                                 void *MainAddr) {
805  llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
806
807  if (!P.isEmpty()) {
808    P.eraseComponent();  // Remove /clang from foo/bin/clang
809    P.eraseComponent();  // Remove /bin   from foo/bin
810
811    // Get foo/lib/clang/<version>/include
812    P.appendComponent("lib");
813    P.appendComponent("clang");
814    P.appendComponent(CLANG_VERSION_STRING);
815  }
816
817  return P.str();
818}
819
820static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
821  using namespace options;
822  Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
823  Opts.Verbose = Args.hasArg(OPT_v);
824  Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
825  Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
826  Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
827  if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
828    Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
829  Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
830  Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodule_cache_path);
831  Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
832
833  // Add -I..., -F..., and -index-header-map options in order.
834  bool IsIndexHeaderMap = false;
835  for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F,
836                                             OPT_index_header_map),
837       ie = Args.filtered_end(); it != ie; ++it) {
838    if ((*it)->getOption().matches(OPT_index_header_map)) {
839      // -index-header-map applies to the next -I or -F.
840      IsIndexHeaderMap = true;
841      continue;
842    }
843
844    frontend::IncludeDirGroup Group
845      = IsIndexHeaderMap? frontend::IndexHeaderMap : frontend::Angled;
846
847    Opts.AddPath((*it)->getValue(), Group, true,
848                 /*IsFramework=*/ (*it)->getOption().matches(OPT_F), false);
849    IsIndexHeaderMap = false;
850  }
851
852  // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
853  StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
854  for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
855                                             OPT_iwithprefixbefore),
856         ie = Args.filtered_end(); it != ie; ++it) {
857    const Arg *A = *it;
858    if (A->getOption().matches(OPT_iprefix))
859      Prefix = A->getValue();
860    else if (A->getOption().matches(OPT_iwithprefix))
861      Opts.AddPath(Prefix.str() + A->getValue(),
862                   frontend::System, false, false, false);
863    else
864      Opts.AddPath(Prefix.str() + A->getValue(),
865                   frontend::Angled, false, false, false);
866  }
867
868  for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
869         ie = Args.filtered_end(); it != ie; ++it)
870    Opts.AddPath((*it)->getValue(), frontend::After, true, false, false);
871  for (arg_iterator it = Args.filtered_begin(OPT_iquote),
872         ie = Args.filtered_end(); it != ie; ++it)
873    Opts.AddPath((*it)->getValue(), frontend::Quoted, true, false, false);
874  for (arg_iterator it = Args.filtered_begin(OPT_isystem,
875         OPT_iwithsysroot), ie = Args.filtered_end(); it != ie; ++it)
876    Opts.AddPath((*it)->getValue(), frontend::System, true, false,
877                 !(*it)->getOption().matches(OPT_iwithsysroot));
878  for (arg_iterator it = Args.filtered_begin(OPT_iframework),
879         ie = Args.filtered_end(); it != ie; ++it)
880    Opts.AddPath((*it)->getValue(), frontend::System, true, true,
881                 true);
882
883  // Add the paths for the various language specific isystem flags.
884  for (arg_iterator it = Args.filtered_begin(OPT_c_isystem),
885       ie = Args.filtered_end(); it != ie; ++it)
886    Opts.AddPath((*it)->getValue(), frontend::CSystem, true, false, true);
887  for (arg_iterator it = Args.filtered_begin(OPT_cxx_isystem),
888       ie = Args.filtered_end(); it != ie; ++it)
889    Opts.AddPath((*it)->getValue(), frontend::CXXSystem, true, false, true);
890  for (arg_iterator it = Args.filtered_begin(OPT_objc_isystem),
891       ie = Args.filtered_end(); it != ie; ++it)
892    Opts.AddPath((*it)->getValue(), frontend::ObjCSystem, true, false,true);
893  for (arg_iterator it = Args.filtered_begin(OPT_objcxx_isystem),
894       ie = Args.filtered_end(); it != ie; ++it)
895    Opts.AddPath((*it)->getValue(), frontend::ObjCXXSystem, true, false,
896                 true);
897
898  // Add the internal paths from a driver that detects standard include paths.
899  for (arg_iterator I = Args.filtered_begin(OPT_internal_isystem,
900                                            OPT_internal_externc_isystem),
901                    E = Args.filtered_end();
902       I != E; ++I)
903    Opts.AddPath((*I)->getValue(), frontend::System,
904                 false, false, /*IgnoreSysRoot=*/true, /*IsInternal=*/true,
905                 (*I)->getOption().matches(OPT_internal_externc_isystem));
906
907  // Add the path prefixes which are implicitly treated as being system headers.
908  for (arg_iterator I = Args.filtered_begin(OPT_isystem_prefix,
909                                            OPT_ino_system_prefix),
910                    E = Args.filtered_end();
911       I != E; ++I)
912    Opts.AddSystemHeaderPrefix((*I)->getValue(),
913                               (*I)->getOption().matches(OPT_isystem_prefix));
914}
915
916void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
917                                         LangStandard::Kind LangStd) {
918  // Set some properties which depend solely on the input kind; it would be nice
919  // to move these to the language standard, and have the driver resolve the
920  // input kind + language standard.
921  if (IK == IK_Asm) {
922    Opts.AsmPreprocessor = 1;
923  } else if (IK == IK_ObjC ||
924             IK == IK_ObjCXX ||
925             IK == IK_PreprocessedObjC ||
926             IK == IK_PreprocessedObjCXX) {
927    Opts.ObjC1 = Opts.ObjC2 = 1;
928  }
929
930  if (LangStd == LangStandard::lang_unspecified) {
931    // Based on the base language, pick one.
932    switch (IK) {
933    case IK_None:
934    case IK_AST:
935    case IK_LLVM_IR:
936      llvm_unreachable("Invalid input kind!");
937    case IK_OpenCL:
938      LangStd = LangStandard::lang_opencl;
939      break;
940    case IK_CUDA:
941      LangStd = LangStandard::lang_cuda;
942      break;
943    case IK_Asm:
944    case IK_C:
945    case IK_PreprocessedC:
946    case IK_ObjC:
947    case IK_PreprocessedObjC:
948      LangStd = LangStandard::lang_gnu99;
949      break;
950    case IK_CXX:
951    case IK_PreprocessedCXX:
952    case IK_ObjCXX:
953    case IK_PreprocessedObjCXX:
954      LangStd = LangStandard::lang_gnucxx98;
955      break;
956    }
957  }
958
959  const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
960  Opts.LineComment = Std.hasLineComments();
961  Opts.C99 = Std.isC99();
962  Opts.C11 = Std.isC11();
963  Opts.CPlusPlus = Std.isCPlusPlus();
964  Opts.CPlusPlus11 = Std.isCPlusPlus11();
965  Opts.CPlusPlus1y = Std.isCPlusPlus1y();
966  Opts.Digraphs = Std.hasDigraphs();
967  Opts.GNUMode = Std.isGNUMode();
968  Opts.GNUInline = !Std.isC99();
969  Opts.HexFloats = Std.hasHexFloats();
970  Opts.ImplicitInt = Std.hasImplicitInt();
971
972  // Set OpenCL Version.
973  if (LangStd == LangStandard::lang_opencl) {
974    Opts.OpenCL = 1;
975    Opts.OpenCLVersion = 100;
976  }
977  else if (LangStd == LangStandard::lang_opencl11) {
978      Opts.OpenCL = 1;
979      Opts.OpenCLVersion = 110;
980  }
981  else if (LangStd == LangStandard::lang_opencl12) {
982    Opts.OpenCL = 1;
983    Opts.OpenCLVersion = 120;
984  }
985
986  // OpenCL has some additional defaults.
987  if (Opts.OpenCL) {
988    Opts.AltiVec = 0;
989    Opts.CXXOperatorNames = 1;
990    Opts.LaxVectorConversions = 0;
991    Opts.DefaultFPContract = 1;
992    Opts.NativeHalfType = 1;
993  }
994
995  if (LangStd == LangStandard::lang_cuda)
996    Opts.CUDA = 1;
997
998  // OpenCL and C++ both have bool, true, false keywords.
999  Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1000
1001  // C++ has wchar_t keyword.
1002  Opts.WChar = Opts.CPlusPlus;
1003
1004  Opts.GNUKeywords = Opts.GNUMode;
1005  Opts.CXXOperatorNames = Opts.CPlusPlus;
1006
1007  // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1008  // is specified, or -std is set to a conforming mode.
1009  Opts.Trigraphs = !Opts.GNUMode;
1010
1011  Opts.DollarIdents = !Opts.AsmPreprocessor;
1012}
1013
1014static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1015                          DiagnosticsEngine &Diags) {
1016  // FIXME: Cleanup per-file based stuff.
1017  LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1018  if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1019    LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1020#define LANGSTANDARD(id, name, desc, features) \
1021      .Case(name, LangStandard::lang_##id)
1022#include "clang/Frontend/LangStandards.def"
1023      .Default(LangStandard::lang_unspecified);
1024    if (LangStd == LangStandard::lang_unspecified)
1025      Diags.Report(diag::err_drv_invalid_value)
1026        << A->getAsString(Args) << A->getValue();
1027    else {
1028      // Valid standard, check to make sure language and standard are compatable.
1029      const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1030      switch (IK) {
1031      case IK_C:
1032      case IK_ObjC:
1033      case IK_PreprocessedC:
1034      case IK_PreprocessedObjC:
1035        if (!(Std.isC89() || Std.isC99()))
1036          Diags.Report(diag::err_drv_argument_not_allowed_with)
1037            << A->getAsString(Args) << "C/ObjC";
1038        break;
1039      case IK_CXX:
1040      case IK_ObjCXX:
1041      case IK_PreprocessedCXX:
1042      case IK_PreprocessedObjCXX:
1043        if (!Std.isCPlusPlus())
1044          Diags.Report(diag::err_drv_argument_not_allowed_with)
1045            << A->getAsString(Args) << "C++/ObjC++";
1046        break;
1047      case IK_OpenCL:
1048        if (!Std.isC99())
1049          Diags.Report(diag::err_drv_argument_not_allowed_with)
1050            << A->getAsString(Args) << "OpenCL";
1051        break;
1052      case IK_CUDA:
1053        if (!Std.isCPlusPlus())
1054          Diags.Report(diag::err_drv_argument_not_allowed_with)
1055            << A->getAsString(Args) << "CUDA";
1056        break;
1057      default:
1058        break;
1059      }
1060    }
1061  }
1062
1063  // -cl-std only applies for OpenCL language standards.
1064  // Override the -std option in this case.
1065  if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1066    LangStandard::Kind OpenCLLangStd
1067    = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1068    .Case("CL", LangStandard::lang_opencl)
1069    .Case("CL1.1", LangStandard::lang_opencl11)
1070    .Case("CL1.2", LangStandard::lang_opencl12)
1071    .Default(LangStandard::lang_unspecified);
1072
1073    if (OpenCLLangStd == LangStandard::lang_unspecified) {
1074      Diags.Report(diag::err_drv_invalid_value)
1075      << A->getAsString(Args) << A->getValue();
1076    }
1077    else
1078      LangStd = OpenCLLangStd;
1079  }
1080
1081  CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1082
1083  // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1084  // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1085  // while a subset (the non-C++ GNU keywords) is provided by GCC's
1086  // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1087  // name, as it doesn't seem a useful distinction.
1088  Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1089                                  Opts.GNUKeywords);
1090
1091  if (Args.hasArg(OPT_fno_operator_names))
1092    Opts.CXXOperatorNames = 0;
1093
1094  if (Opts.ObjC1) {
1095    if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1096      StringRef value = arg->getValue();
1097      if (Opts.ObjCRuntime.tryParse(value))
1098        Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1099    }
1100
1101    if (Args.hasArg(OPT_fobjc_gc_only))
1102      Opts.setGC(LangOptions::GCOnly);
1103    else if (Args.hasArg(OPT_fobjc_gc))
1104      Opts.setGC(LangOptions::HybridGC);
1105    else if (Args.hasArg(OPT_fobjc_arc)) {
1106      Opts.ObjCAutoRefCount = 1;
1107      if (!Opts.ObjCRuntime.allowsARC())
1108        Diags.Report(diag::err_arc_unsupported_on_runtime);
1109
1110      // Only set ObjCARCWeak if ARC is enabled.
1111      if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1112        Opts.ObjCARCWeak = 1;
1113      else
1114        Opts.ObjCARCWeak = Opts.ObjCRuntime.allowsWeak();
1115    }
1116
1117    if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1118      Opts.ObjCInferRelatedResultType = 0;
1119  }
1120
1121  if (Args.hasArg(OPT_fgnu89_inline))
1122    Opts.GNUInline = 1;
1123
1124  if (Args.hasArg(OPT_fapple_kext)) {
1125    if (!Opts.CPlusPlus)
1126      Diags.Report(diag::warn_c_kext);
1127    else
1128      Opts.AppleKext = 1;
1129  }
1130
1131  if (Args.hasArg(OPT_print_ivar_layout))
1132    Opts.ObjCGCBitmapPrint = 1;
1133  if (Args.hasArg(OPT_fno_constant_cfstrings))
1134    Opts.NoConstantCFStrings = 1;
1135
1136  if (Args.hasArg(OPT_faltivec))
1137    Opts.AltiVec = 1;
1138
1139  if (Args.hasArg(OPT_pthread))
1140    Opts.POSIXThreads = 1;
1141
1142  if (Args.hasArg(OPT_fdelayed_template_parsing))
1143    Opts.DelayedTemplateParsing = 1;
1144
1145  StringRef Vis = Args.getLastArgValue(OPT_fvisibility, "default");
1146  if (Vis == "default")
1147    Opts.setVisibilityMode(DefaultVisibility);
1148  else if (Vis == "hidden")
1149    Opts.setVisibilityMode(HiddenVisibility);
1150  else if (Vis == "protected")
1151    // FIXME: diagnose if target does not support protected visibility
1152    Opts.setVisibilityMode(ProtectedVisibility);
1153  else
1154    Diags.Report(diag::err_drv_invalid_value)
1155      << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1156
1157  if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1158    Opts.InlineVisibilityHidden = 1;
1159
1160  if (Args.hasArg(OPT_ftrapv)) {
1161    Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1162    // Set the handler, if one is specified.
1163    Opts.OverflowHandler =
1164        Args.getLastArgValue(OPT_ftrapv_handler);
1165  }
1166  else if (Args.hasArg(OPT_fwrapv))
1167    Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1168
1169  if (Args.hasArg(OPT_trigraphs))
1170    Opts.Trigraphs = 1;
1171
1172  Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1173                                   OPT_fno_dollars_in_identifiers,
1174                                   Opts.DollarIdents);
1175  Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1176  Opts.MicrosoftExt
1177    = Args.hasArg(OPT_fms_extensions) || Args.hasArg(OPT_fms_compatibility);
1178  Opts.MicrosoftMode = Args.hasArg(OPT_fms_compatibility);
1179  Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
1180  Opts.MSCVersion = Args.getLastArgIntValue(OPT_fmsc_version, 0, Diags);
1181  Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1182  Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1183  Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
1184                                   Opts.ConstStrings);
1185  if (Args.hasArg(OPT_fno_lax_vector_conversions))
1186    Opts.LaxVectorConversions = 0;
1187  if (Args.hasArg(OPT_fno_threadsafe_statics))
1188    Opts.ThreadsafeStatics = 0;
1189  Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1190  Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
1191  Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
1192  Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1193  Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
1194
1195  Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1196  Opts.Blocks = Args.hasArg(OPT_fblocks);
1197  Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
1198  Opts.Modules = Args.hasArg(OPT_fmodules);
1199  Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1200  Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
1201  Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1202  Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1203  Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1204  Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1205  Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1206  Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1207  Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1208  Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1209  Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1210  Opts.InstantiationDepth = Args.getLastArgIntValue(OPT_ftemplate_depth, 512,
1211                                                    Diags);
1212  Opts.ConstexprCallDepth = Args.getLastArgIntValue(OPT_fconstexpr_depth, 512,
1213                                                    Diags);
1214  Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
1215  Opts.NumLargeByValueCopy = Args.getLastArgIntValue(OPT_Wlarge_by_value_copy_EQ,
1216                                                    0, Diags);
1217  Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
1218  Opts.ObjCConstantStringClass =
1219    Args.getLastArgValue(OPT_fconstant_string_class);
1220  Opts.ObjCDefaultSynthProperties =
1221    Args.hasArg(OPT_fobjc_default_synthesize_properties);
1222  Opts.EncodeExtendedBlockSig =
1223    Args.hasArg(OPT_fencode_extended_block_signature);
1224  Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1225  Opts.PackStruct = Args.getLastArgIntValue(OPT_fpack_struct_EQ, 0, Diags);
1226  Opts.PICLevel = Args.getLastArgIntValue(OPT_pic_level, 0, Diags);
1227  Opts.PIELevel = Args.getLastArgIntValue(OPT_pie_level, 0, Diags);
1228  Opts.Static = Args.hasArg(OPT_static_define);
1229  Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
1230  Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
1231                        || Args.hasArg(OPT_fdump_record_layouts);
1232  Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1233  Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1234  Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1235  Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
1236  Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
1237  Opts.MRTD = Args.hasArg(OPT_mrtd);
1238  Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
1239  Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
1240  Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
1241  Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
1242  Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
1243  Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
1244  Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
1245  Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
1246
1247  // Check if -fopenmp is specified.
1248  Opts.OpenMP = Args.hasArg(OPT_fopenmp);
1249
1250  // Record whether the __DEPRECATED define was requested.
1251  Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
1252                                 OPT_fno_deprecated_macro,
1253                                 Opts.Deprecated);
1254
1255  // FIXME: Eliminate this dependency.
1256  unsigned Opt = getOptimizationLevel(Args, IK, Diags),
1257       OptSize = getOptimizationLevelSize(Args, IK, Diags);
1258  Opts.Optimize = Opt != 0;
1259  Opts.OptimizeSize = OptSize != 0;
1260
1261  // This is the __NO_INLINE__ define, which just depends on things like the
1262  // optimization level and -fno-inline, not actually whether the backend has
1263  // inlining enabled.
1264  Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
1265
1266  Opts.FastMath = Args.hasArg(OPT_ffast_math);
1267  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only);
1268
1269  Opts.RetainCommentsFromSystemHeaders =
1270      Args.hasArg(OPT_fretain_comments_from_system_headers);
1271
1272  unsigned SSP = Args.getLastArgIntValue(OPT_stack_protector, 0, Diags);
1273  switch (SSP) {
1274  default:
1275    Diags.Report(diag::err_drv_invalid_value)
1276      << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1277    break;
1278  case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
1279  case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
1280  case 2: Opts.setStackProtector(LangOptions::SSPReq); break;
1281  }
1282
1283  // Parse -fsanitize= arguments.
1284  std::vector<std::string> Sanitizers = Args.getAllArgValues(OPT_fsanitize_EQ);
1285  for (unsigned I = 0, N = Sanitizers.size(); I != N; ++I) {
1286    // Since the Opts.Sanitize* values are bitfields, it's a little tricky to
1287    // efficiently map string values to them. Perform the mapping indirectly:
1288    // convert strings to enumerated values, then switch over the enum to set
1289    // the right bitfield value.
1290    enum Sanitizer {
1291#define SANITIZER(NAME, ID) \
1292      ID,
1293#include "clang/Basic/Sanitizers.def"
1294      Unknown
1295    };
1296    switch (llvm::StringSwitch<unsigned>(Sanitizers[I])
1297#define SANITIZER(NAME, ID) \
1298              .Case(NAME, ID)
1299#include "clang/Basic/Sanitizers.def"
1300              .Default(Unknown)) {
1301#define SANITIZER(NAME, ID) \
1302    case ID: \
1303      Opts.Sanitize.ID = true; \
1304      break;
1305#include "clang/Basic/Sanitizers.def"
1306
1307    case Unknown:
1308      Diags.Report(diag::err_drv_invalid_value)
1309        << "-fsanitize=" << Sanitizers[I];
1310      break;
1311    }
1312  }
1313}
1314
1315static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1316                                  FileManager &FileMgr,
1317                                  DiagnosticsEngine &Diags) {
1318  using namespace options;
1319  Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1320  Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1321  if (const Arg *A = Args.getLastArg(OPT_token_cache))
1322      Opts.TokenCache = A->getValue();
1323  else
1324    Opts.TokenCache = Opts.ImplicitPTHInclude;
1325  Opts.UsePredefines = !Args.hasArg(OPT_undef);
1326  Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1327  Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1328
1329  Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
1330  for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
1331         ie = Args.filtered_end(); it != ie; ++it) {
1332    const Arg *A = *it;
1333    Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
1334  }
1335
1336  if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1337    StringRef Value(A->getValue());
1338    size_t Comma = Value.find(',');
1339    unsigned Bytes = 0;
1340    unsigned EndOfLine = 0;
1341
1342    if (Comma == StringRef::npos ||
1343        Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1344        Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1345      Diags.Report(diag::err_drv_preamble_format);
1346    else {
1347      Opts.PrecompiledPreambleBytes.first = Bytes;
1348      Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1349    }
1350  }
1351
1352  // Add macros from the command line.
1353  for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1354         ie = Args.filtered_end(); it != ie; ++it) {
1355    if ((*it)->getOption().matches(OPT_D))
1356      Opts.addMacroDef((*it)->getValue());
1357    else
1358      Opts.addMacroUndef((*it)->getValue());
1359  }
1360
1361  Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1362
1363  // Add the ordered list of -includes.
1364  for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1365                                             OPT_include_pth),
1366         ie = Args.filtered_end(); it != ie; ++it) {
1367    const Arg *A = *it;
1368    Opts.Includes.push_back(A->getValue());
1369  }
1370
1371  for (arg_iterator it = Args.filtered_begin(OPT_chain_include),
1372         ie = Args.filtered_end(); it != ie; ++it) {
1373    const Arg *A = *it;
1374    Opts.ChainedIncludes.push_back(A->getValue());
1375  }
1376
1377  // Include 'altivec.h' if -faltivec option present
1378  if (Args.hasArg(OPT_faltivec))
1379    Opts.Includes.push_back("altivec.h");
1380
1381  for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1382         ie = Args.filtered_end(); it != ie; ++it) {
1383    const Arg *A = *it;
1384    std::pair<StringRef,StringRef> Split =
1385      StringRef(A->getValue()).split(';');
1386
1387    if (Split.second.empty()) {
1388      Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1389      continue;
1390    }
1391
1392    Opts.addRemappedFile(Split.first, Split.second);
1393  }
1394
1395  if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
1396    StringRef Name = A->getValue();
1397    unsigned Library = llvm::StringSwitch<unsigned>(Name)
1398      .Case("libc++", ARCXX_libcxx)
1399      .Case("libstdc++", ARCXX_libstdcxx)
1400      .Case("none", ARCXX_nolib)
1401      .Default(~0U);
1402    if (Library == ~0U)
1403      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1404    else
1405      Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
1406  }
1407}
1408
1409static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1410                                        ArgList &Args) {
1411  using namespace options;
1412  Opts.ShowCPP = !Args.hasArg(OPT_dM);
1413  Opts.ShowComments = Args.hasArg(OPT_C);
1414  Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1415  Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1416  Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1417  Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
1418}
1419
1420static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1421  using namespace options;
1422  Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1423  Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
1424  Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1425  Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
1426  Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1427  Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1428
1429  // Use the default target triple if unspecified.
1430  if (Opts.Triple.empty())
1431    Opts.Triple = llvm::sys::getDefaultTargetTriple();
1432}
1433
1434//
1435
1436bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1437                                        const char *const *ArgBegin,
1438                                        const char *const *ArgEnd,
1439                                        DiagnosticsEngine &Diags) {
1440  bool Success = true;
1441
1442  // Parse the arguments.
1443  OwningPtr<OptTable> Opts(createDriverOptTable());
1444  unsigned MissingArgIndex, MissingArgCount;
1445  OwningPtr<InputArgList> Args(
1446    Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1447
1448  // Check for missing argument error.
1449  if (MissingArgCount) {
1450    Diags.Report(diag::err_drv_missing_argument)
1451      << Args->getArgString(MissingArgIndex) << MissingArgCount;
1452    Success = false;
1453  }
1454
1455  // Issue errors on unknown arguments.
1456  for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1457         ie = Args->filtered_end(); it != ie; ++it) {
1458    Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
1459    Success = false;
1460  }
1461
1462  // Issue errors on arguments that are not valid for CC1.
1463  for (ArgList::iterator I = Args->begin(), E = Args->end();
1464       I != E; ++I) {
1465    if (!(*I)->getOption().hasFlag(options::CC1Option)) {
1466      Diags.Report(diag::err_drv_unknown_argument) << (*I)->getAsString(*Args);
1467      Success = false;
1468    }
1469  }
1470
1471  Success = ParseAnalyzerArgs(*Res.getAnalyzerOpts(), *Args, Diags) && Success;
1472  Success = ParseMigratorArgs(Res.getMigratorOpts(), *Args) && Success;
1473  ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1474  Success = ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, &Diags)
1475            && Success;
1476  ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
1477  // FIXME: We shouldn't have to pass the DashX option around here
1478  InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1479  Success = ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags)
1480            && Success;
1481  ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1482  if (DashX != IK_AST && DashX != IK_LLVM_IR) {
1483    ParseLangArgs(*Res.getLangOpts(), *Args, DashX, Diags);
1484    if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
1485      Res.getLangOpts()->ObjCExceptions = 1;
1486  }
1487  // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
1488  // PCH file and find the original header name. Remove the need to do that in
1489  // ParsePreprocessorArgs and remove the FileManager
1490  // parameters from the function and the "FileManager.h" #include.
1491  FileManager FileMgr(Res.getFileSystemOpts());
1492  ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
1493  ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
1494  ParseTargetArgs(Res.getTargetOpts(), *Args);
1495
1496  return Success;
1497}
1498
1499namespace {
1500
1501  class ModuleSignature {
1502    SmallVector<uint64_t, 16> Data;
1503    unsigned CurBit;
1504    uint64_t CurValue;
1505
1506  public:
1507    ModuleSignature() : CurBit(0), CurValue(0) { }
1508
1509    void add(uint64_t Value, unsigned Bits);
1510    void add(StringRef Value);
1511    void flush();
1512
1513    llvm::APInt getAsInteger() const;
1514  };
1515}
1516
1517void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
1518  CurValue |= Value << CurBit;
1519  if (CurBit + NumBits < 64) {
1520    CurBit += NumBits;
1521    return;
1522  }
1523
1524  // Add the current word.
1525  Data.push_back(CurValue);
1526
1527  if (CurBit)
1528    CurValue = Value >> (64-CurBit);
1529  else
1530    CurValue = 0;
1531  CurBit = (CurBit+NumBits) & 63;
1532}
1533
1534void ModuleSignature::flush() {
1535  if (CurBit == 0)
1536    return;
1537
1538  Data.push_back(CurValue);
1539  CurBit = 0;
1540  CurValue = 0;
1541}
1542
1543void ModuleSignature::add(StringRef Value) {
1544  for (StringRef::iterator I = Value.begin(), IEnd = Value.end(); I != IEnd;++I)
1545    add(*I, 8);
1546}
1547
1548llvm::APInt ModuleSignature::getAsInteger() const {
1549  return llvm::APInt(Data.size() * 64, Data);
1550}
1551
1552std::string CompilerInvocation::getModuleHash() const {
1553  using llvm::hash_code;
1554  using llvm::hash_value;
1555  using llvm::hash_combine;
1556
1557  // Start the signature with the compiler version.
1558  // FIXME: We'd rather use something more cryptographically sound than
1559  // CityHash, but this will do for now.
1560  hash_code code = hash_value(getClangFullRepositoryVersion());
1561
1562  // Extend the signature with the language options
1563#define LANGOPT(Name, Bits, Default, Description) \
1564   code = hash_combine(code, LangOpts->Name);
1565#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
1566  code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
1567#define BENIGN_LANGOPT(Name, Bits, Default, Description)
1568#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
1569#include "clang/Basic/LangOptions.def"
1570
1571  // Extend the signature with the target options.
1572  code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
1573                      TargetOpts->ABI, TargetOpts->CXXABI,
1574                      TargetOpts->LinkerVersion);
1575  for (unsigned i = 0, n = TargetOpts->FeaturesAsWritten.size(); i != n; ++i)
1576    code = hash_combine(code, TargetOpts->FeaturesAsWritten[i]);
1577
1578  // Extend the signature with preprocessor options.
1579  const PreprocessorOptions &ppOpts = getPreprocessorOpts();
1580  code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
1581
1582  std::vector<StringRef> MacroDefs;
1583  for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
1584            I = getPreprocessorOpts().Macros.begin(),
1585         IEnd = getPreprocessorOpts().Macros.end();
1586       I != IEnd; ++I) {
1587    code = hash_combine(code, I->first, I->second);
1588  }
1589
1590  // Extend the signature with the sysroot.
1591  const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
1592  code = hash_combine(code, hsOpts.Sysroot, hsOpts.UseBuiltinIncludes,
1593                      hsOpts.UseStandardSystemIncludes,
1594                      hsOpts.UseStandardCXXIncludes,
1595                      hsOpts.UseLibcxx);
1596
1597  return llvm::APInt(64, code).toString(36, /*Signed=*/false);
1598}
1599