CompilerInvocation.cpp revision 15490fd42d7d8dca2f9b5b3a9dc074892ca1acd7 
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/CompilerInvocation.h"
21#include "clang/Frontend/LangStandard.h"
22#include "clang/Lex/HeaderSearchOptions.h"
23#include "clang/Serialization/ASTReader.h"
24#include "llvm/ADT/Hashing.h"
25#include "llvm/ADT/OwningPtr.h"
26#include "llvm/ADT/SmallVector.h"
27#include "llvm/ADT/StringExtras.h"
28#include "llvm/ADT/StringSwitch.h"
29#include "llvm/ADT/Triple.h"
30#include "llvm/Support/ErrorHandling.h"
31#include "llvm/Support/Host.h"
32#include "llvm/Support/Path.h"
33using namespace clang;
34
35//===----------------------------------------------------------------------===//
36// Initialization.
37//===----------------------------------------------------------------------===//
38
39CompilerInvocationBase::CompilerInvocationBase()
40  : LangOpts(new LangOptions()), TargetOpts(new TargetOptions()),
41    DiagnosticOpts(new DiagnosticOptions()),
42    HeaderSearchOpts(new HeaderSearchOptions()),
43    PreprocessorOpts(new PreprocessorOptions()) {}
44
45CompilerInvocationBase::CompilerInvocationBase(const CompilerInvocationBase &X)
46  : RefCountedBase<CompilerInvocation>(),
47    LangOpts(new LangOptions(*X.getLangOpts())),
48    TargetOpts(new TargetOptions(X.getTargetOpts())),
49    DiagnosticOpts(new DiagnosticOptions(X.getDiagnosticOpts())),
50    HeaderSearchOpts(new HeaderSearchOptions(X.getHeaderSearchOpts())),
51    PreprocessorOpts(new PreprocessorOptions(X.getPreprocessorOpts())) {}
52
53//===----------------------------------------------------------------------===//
54// Deserialization (from args)
55//===----------------------------------------------------------------------===//
56
57using namespace clang::driver;
58using namespace clang::driver::options;
59
60//
61
62static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
63                                     DiagnosticsEngine &Diags) {
64  unsigned DefaultOpt = 0;
65  if (IK == IK_OpenCL && !Args.hasArg(OPT_cl_opt_disable))
66    DefaultOpt = 2;
67
68  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
69    if (A->getOption().matches(options::OPT_O0))
70      return 0;
71
72    assert (A->getOption().matches(options::OPT_O));
73
74    llvm::StringRef S(A->getValue());
75    if (S == "s" || S == "z" || S.empty())
76      return 2;
77
78    return Args.getLastArgIntValue(OPT_O, DefaultOpt, Diags);
79  }
80
81  return DefaultOpt;
82}
83
84static unsigned getOptimizationLevelSize(ArgList &Args, InputKind IK,
85                                         DiagnosticsEngine &Diags) {
86  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
87    if (A->getOption().matches(options::OPT_O)) {
88      switch (A->getValue()[0]) {
89      default:
90        return 0;
91      case 's':
92        return 1;
93      case 'z':
94        return 2;
95      }
96    }
97  }
98  return 0;
99}
100
101static void addWarningArgs(ArgList &Args, std::vector<std::string> &Warnings) {
102  for (arg_iterator I = Args.filtered_begin(OPT_W_Group),
103         E = Args.filtered_end(); I != E; ++I) {
104    Arg *A = *I;
105    // If the argument is a pure flag, add its name (minus the "W" at the beginning)
106    // to the warning list. Else, add its value (for the OPT_W case).
107    if (A->getOption().getKind() == Option::FlagClass) {
108      Warnings.push_back(A->getOption().getName().substr(1));
109    } else {
110      for (unsigned Idx = 0, End = A->getNumValues();
111           Idx < End; ++Idx) {
112        StringRef V = A->getValue(Idx);
113        // "-Wl," and such are not warning options.
114        // FIXME: Should be handled by putting these in separate flags.
115        if (V.startswith("l,") || V.startswith("a,") || V.startswith("p,"))
116          continue;
117
118        Warnings.push_back(V);
119      }
120    }
121  }
122}
123
124static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
125                              DiagnosticsEngine &Diags) {
126  using namespace options;
127  bool Success = true;
128  if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
129    StringRef Name = A->getValue();
130    AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
131#define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
132      .Case(CMDFLAG, NAME##Model)
133#include "clang/StaticAnalyzer/Core/Analyses.def"
134      .Default(NumStores);
135    if (Value == NumStores) {
136      Diags.Report(diag::err_drv_invalid_value)
137        << A->getAsString(Args) << Name;
138      Success = false;
139    } else {
140      Opts.AnalysisStoreOpt = Value;
141    }
142  }
143
144  if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
145    StringRef Name = A->getValue();
146    AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
147#define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
148      .Case(CMDFLAG, NAME##Model)
149#include "clang/StaticAnalyzer/Core/Analyses.def"
150      .Default(NumConstraints);
151    if (Value == NumConstraints) {
152      Diags.Report(diag::err_drv_invalid_value)
153        << A->getAsString(Args) << Name;
154      Success = false;
155    } else {
156      Opts.AnalysisConstraintsOpt = Value;
157    }
158  }
159
160  if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
161    StringRef Name = A->getValue();
162    AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
163#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
164      .Case(CMDFLAG, PD_##NAME)
165#include "clang/StaticAnalyzer/Core/Analyses.def"
166      .Default(NUM_ANALYSIS_DIAG_CLIENTS);
167    if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
168      Diags.Report(diag::err_drv_invalid_value)
169        << A->getAsString(Args) << Name;
170      Success = false;
171    } else {
172      Opts.AnalysisDiagOpt = Value;
173    }
174  }
175
176  if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
177    StringRef Name = A->getValue();
178    AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
179#define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
180      .Case(CMDFLAG, NAME)
181#include "clang/StaticAnalyzer/Core/Analyses.def"
182      .Default(NumPurgeModes);
183    if (Value == NumPurgeModes) {
184      Diags.Report(diag::err_drv_invalid_value)
185        << A->getAsString(Args) << Name;
186      Success = false;
187    } else {
188      Opts.AnalysisPurgeOpt = Value;
189    }
190  }
191
192  if (Arg *A = Args.getLastArg(OPT_analyzer_ipa)) {
193    StringRef Name = A->getValue();
194    AnalysisIPAMode Value = llvm::StringSwitch<AnalysisIPAMode>(Name)
195#define ANALYSIS_IPA(NAME, CMDFLAG, DESC) \
196      .Case(CMDFLAG, NAME)
197#include "clang/StaticAnalyzer/Core/Analyses.def"
198      .Default(NumIPAModes);
199    if (Value == NumIPAModes) {
200      Diags.Report(diag::err_drv_invalid_value)
201        << A->getAsString(Args) << Name;
202      Success = false;
203    } else {
204      Opts.IPAMode = Value;
205    }
206  }
207
208  if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
209    StringRef Name = A->getValue();
210    AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
211#define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
212      .Case(CMDFLAG, NAME)
213#include "clang/StaticAnalyzer/Core/Analyses.def"
214      .Default(NumInliningModes);
215    if (Value == NumInliningModes) {
216      Diags.Report(diag::err_drv_invalid_value)
217        << A->getAsString(Args) << Name;
218      Success = false;
219    } else {
220      Opts.InliningMode = Value;
221    }
222  }
223
224  Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
225  Opts.visualizeExplodedGraphWithGraphViz =
226    Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
227  Opts.visualizeExplodedGraphWithUbiGraph =
228    Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
229  Opts.NoRetryExhausted = Args.hasArg(OPT_analyzer_disable_retry_exhausted);
230  Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
231  Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
232  Opts.AnalyzeNestedBlocks =
233    Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
234  Opts.eagerlyAssumeBinOpBifurcation = Args.hasArg(OPT_analyzer_eagerly_assume);
235  Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
236  Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
237  Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
238  Opts.MaxNodes = Args.getLastArgIntValue(OPT_analyzer_max_nodes, 150000,Diags);
239  Opts.maxBlockVisitOnPath = Args.getLastArgIntValue(OPT_analyzer_max_loop, 4, Diags);
240  Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
241  Opts.InlineMaxStackDepth =
242    Args.getLastArgIntValue(OPT_analyzer_inline_max_stack_depth,
243                            Opts.InlineMaxStackDepth, Diags);
244  Opts.InlineMaxFunctionSize =
245    Args.getLastArgIntValue(OPT_analyzer_inline_max_function_size,
246                            Opts.InlineMaxFunctionSize, Diags);
247
248  Opts.CheckersControlList.clear();
249  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_checker,
250                                             OPT_analyzer_disable_checker),
251         ie = Args.filtered_end(); it != ie; ++it) {
252    const Arg *A = *it;
253    A->claim();
254    bool enable = (A->getOption().getID() == OPT_analyzer_checker);
255    // We can have a list of comma separated checker names, e.g:
256    // '-analyzer-checker=cocoa,unix'
257    StringRef checkerList = A->getValue();
258    SmallVector<StringRef, 4> checkers;
259    checkerList.split(checkers, ",");
260    for (unsigned i = 0, e = checkers.size(); i != e; ++i)
261      Opts.CheckersControlList.push_back(std::make_pair(checkers[i], enable));
262  }
263
264  // Go through the analyzer configuration options.
265  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_config),
266       ie = Args.filtered_end(); it != ie; ++it) {
267    const Arg *A = *it;
268    A->claim();
269    // We can have a list of comma separated config names, e.g:
270    // '-analyzer-config key1=val1,key2=val2'
271    StringRef configList = A->getValue();
272    SmallVector<StringRef, 4> configVals;
273    configList.split(configVals, ",");
274    for (unsigned i = 0, e = configVals.size(); i != e; ++i) {
275      StringRef key, val;
276      llvm::tie(key, val) = configVals[i].split("=");
277      if (val.empty()) {
278        Diags.Report(SourceLocation(),
279                     diag::err_analyzer_config_no_value) << configVals[i];
280        Success = false;
281        break;
282      }
283      if (val.find('=') != StringRef::npos) {
284        Diags.Report(SourceLocation(),
285                     diag::err_analyzer_config_multiple_values)
286          << configVals[i];
287        Success = false;
288        break;
289      }
290      Opts.Config[key] = val;
291    }
292  }
293
294  return Success;
295}
296
297static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
298  Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
299  Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
300  return true;
301}
302
303static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
304                             DiagnosticsEngine &Diags) {
305  using namespace options;
306  bool Success = true;
307
308  unsigned OptLevel = getOptimizationLevel(Args, IK, Diags);
309  if (OptLevel > 3) {
310    Diags.Report(diag::err_drv_invalid_value)
311      << Args.getLastArg(OPT_O)->getAsString(Args) << OptLevel;
312    OptLevel = 3;
313    Success = false;
314  }
315  Opts.OptimizationLevel = OptLevel;
316
317  // We must always run at least the always inlining pass.
318  Opts.setInlining(
319    (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
320                                 : CodeGenOptions::OnlyAlwaysInlining);
321  // -fno-inline-functions overrides OptimizationLevel > 1.
322  Opts.NoInline = Args.hasArg(OPT_fno_inline);
323  Opts.setInlining(Args.hasArg(OPT_fno_inline_functions) ?
324                     CodeGenOptions::OnlyAlwaysInlining : Opts.getInlining());
325
326  if (Args.hasArg(OPT_gline_tables_only)) {
327    Opts.setDebugInfo(CodeGenOptions::DebugLineTablesOnly);
328  } else if (Args.hasArg(OPT_g_Flag)) {
329    if (Args.hasFlag(OPT_flimit_debug_info, OPT_fno_limit_debug_info, true))
330      Opts.setDebugInfo(CodeGenOptions::LimitedDebugInfo);
331    else
332      Opts.setDebugInfo(CodeGenOptions::FullDebugInfo);
333  }
334  Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
335
336  Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
337  Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
338  Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
339  Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
340    OPT_fuse_register_sized_bitfield_access);
341  Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
342  Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
343  Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
344  Opts.NoCommon = Args.hasArg(OPT_fno_common);
345  Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
346  Opts.OptimizeSize = getOptimizationLevelSize(Args, IK, Diags);
347  Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
348                            Args.hasArg(OPT_ffreestanding));
349  Opts.UnrollLoops = Args.hasArg(OPT_funroll_loops) ||
350                     (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
351
352  Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
353  Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
354  Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);
355  Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
356  Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
357  Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
358  Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
359  Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
360  Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
361  Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
362  Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
363  Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
364  Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
365  Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
366                       Args.hasArg(OPT_cl_finite_math_only)||
367                       Args.hasArg(OPT_cl_fast_relaxed_math));
368  Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
369                       Args.hasArg(OPT_cl_finite_math_only)||
370                       Args.hasArg(OPT_cl_fast_relaxed_math));
371  Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
372  Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
373  Opts.NumRegisterParameters = Args.getLastArgIntValue(OPT_mregparm, 0, Diags);
374  Opts.NoGlobalMerge = Args.hasArg(OPT_mno_global_merge);
375  Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
376  Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
377  Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
378  Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
379  Opts.NoDwarf2CFIAsm = Args.hasArg(OPT_fno_dwarf2_cfi_asm);
380  Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
381  Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
382  Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
383  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
384                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
385                      Args.hasArg(OPT_cl_fast_relaxed_math);
386  Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
387  Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
388  Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
389  Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
390
391  Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
392  Opts.DataSections = Args.hasArg(OPT_fdata_sections);
393
394  Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
395  Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
396  Opts.SanitizeRecover = Args.hasArg(OPT_fsanitize_recover);
397
398  Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
399  Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
400  Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
401  Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
402  Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
403  Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
404  Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
405  Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
406  Opts.SanitizerBlacklistFile = Args.getLastArgValue(OPT_fsanitize_blacklist);
407  Opts.SSPBufferSize =
408    Args.getLastArgIntValue(OPT_stack_protector_buffer_size, 8, Diags);
409  Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
410  if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
411    StringRef Val = A->getValue();
412    unsigned StackAlignment = Opts.StackAlignment;
413    Val.getAsInteger(10, StackAlignment);
414    Opts.StackAlignment = StackAlignment;
415  }
416
417  if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
418    StringRef Name = A->getValue();
419    unsigned Method = llvm::StringSwitch<unsigned>(Name)
420      .Case("legacy", CodeGenOptions::Legacy)
421      .Case("non-legacy", CodeGenOptions::NonLegacy)
422      .Case("mixed", CodeGenOptions::Mixed)
423      .Default(~0U);
424    if (Method == ~0U) {
425      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
426      Success = false;
427    } else {
428      Opts.setObjCDispatchMethod(
429        static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
430    }
431  }
432
433  if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
434    StringRef Name = A->getValue();
435    unsigned Model = llvm::StringSwitch<unsigned>(Name)
436        .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
437        .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
438        .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
439        .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
440        .Default(~0U);
441    if (Model == ~0U) {
442      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
443      Success = false;
444    } else {
445      Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
446    }
447  }
448
449  if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
450    StringRef Val = A->getValue();
451    if (Val == "fast")
452      Opts.setFPContractMode(CodeGenOptions::FPC_Fast);
453    else if (Val == "on")
454      Opts.setFPContractMode(CodeGenOptions::FPC_On);
455    else if (Val == "off")
456      Opts.setFPContractMode(CodeGenOptions::FPC_Off);
457    else
458      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
459  }
460
461  return Success;
462}
463
464static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
465                                      ArgList &Args) {
466  using namespace options;
467  Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
468  Opts.Targets = Args.getAllArgValues(OPT_MT);
469  Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
470  Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
471  Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
472  Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
473  Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
474  Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
475}
476
477bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
478                                DiagnosticsEngine *Diags) {
479  using namespace options;
480  bool Success = true;
481
482  Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
483  Opts.DiagnosticSerializationFile =
484    Args.getLastArgValue(OPT_diagnostic_serialized_file);
485  Opts.IgnoreWarnings = Args.hasArg(OPT_w);
486  Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
487  Opts.Pedantic = Args.hasArg(OPT_pedantic);
488  Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
489  Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
490  Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
491  Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
492                                 OPT_fno_show_column,
493                                 /*Default=*/true);
494  Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
495  Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
496  Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
497
498  // Default behavior is to not to show note include stacks.
499  Opts.ShowNoteIncludeStack = false;
500  if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
501                               OPT_fno_diagnostics_show_note_include_stack))
502    if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
503      Opts.ShowNoteIncludeStack = true;
504
505  StringRef ShowOverloads =
506    Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
507  if (ShowOverloads == "best")
508    Opts.setShowOverloads(Ovl_Best);
509  else if (ShowOverloads == "all")
510    Opts.setShowOverloads(Ovl_All);
511  else {
512    Success = false;
513    if (Diags)
514      Diags->Report(diag::err_drv_invalid_value)
515      << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
516      << ShowOverloads;
517  }
518
519  StringRef ShowCategory =
520    Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
521  if (ShowCategory == "none")
522    Opts.ShowCategories = 0;
523  else if (ShowCategory == "id")
524    Opts.ShowCategories = 1;
525  else if (ShowCategory == "name")
526    Opts.ShowCategories = 2;
527  else {
528    Success = false;
529    if (Diags)
530      Diags->Report(diag::err_drv_invalid_value)
531      << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
532      << ShowCategory;
533  }
534
535  StringRef Format =
536    Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
537  if (Format == "clang")
538    Opts.setFormat(DiagnosticOptions::Clang);
539  else if (Format == "msvc")
540    Opts.setFormat(DiagnosticOptions::Msvc);
541  else if (Format == "vi")
542    Opts.setFormat(DiagnosticOptions::Vi);
543  else {
544    Success = false;
545    if (Diags)
546      Diags->Report(diag::err_drv_invalid_value)
547      << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
548      << Format;
549  }
550
551  Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
552  Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
553  Opts.ShowPresumedLoc = !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
554  Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
555  Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
556  Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
557  Opts.ErrorLimit = Args.getLastArgIntValue(OPT_ferror_limit, 0, Diags);
558  Opts.MacroBacktraceLimit
559    = Args.getLastArgIntValue(OPT_fmacro_backtrace_limit,
560                         DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
561  Opts.TemplateBacktraceLimit
562    = Args.getLastArgIntValue(OPT_ftemplate_backtrace_limit,
563                         DiagnosticOptions::DefaultTemplateBacktraceLimit,
564                         Diags);
565  Opts.ConstexprBacktraceLimit
566    = Args.getLastArgIntValue(OPT_fconstexpr_backtrace_limit,
567                         DiagnosticOptions::DefaultConstexprBacktraceLimit,
568                         Diags);
569  Opts.TabStop = Args.getLastArgIntValue(OPT_ftabstop,
570                                    DiagnosticOptions::DefaultTabStop, Diags);
571  if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
572    Opts.TabStop = DiagnosticOptions::DefaultTabStop;
573    if (Diags)
574      Diags->Report(diag::warn_ignoring_ftabstop_value)
575      << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
576  }
577  Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
578  Opts.DumpBuildInformation = Args.getLastArgValue(OPT_dump_build_information);
579  addWarningArgs(Args, Opts.Warnings);
580
581  return Success;
582}
583
584static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
585  Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
586}
587
588static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
589                                   DiagnosticsEngine &Diags) {
590  using namespace options;
591  Opts.ProgramAction = frontend::ParseSyntaxOnly;
592  if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
593    switch (A->getOption().getID()) {
594    default:
595      llvm_unreachable("Invalid option in group!");
596    case OPT_ast_list:
597      Opts.ProgramAction = frontend::ASTDeclList; break;
598    case OPT_ast_dump:
599      Opts.ProgramAction = frontend::ASTDump; break;
600    case OPT_ast_dump_xml:
601      Opts.ProgramAction = frontend::ASTDumpXML; break;
602    case OPT_ast_print:
603      Opts.ProgramAction = frontend::ASTPrint; break;
604    case OPT_ast_view:
605      Opts.ProgramAction = frontend::ASTView; break;
606    case OPT_dump_raw_tokens:
607      Opts.ProgramAction = frontend::DumpRawTokens; break;
608    case OPT_dump_tokens:
609      Opts.ProgramAction = frontend::DumpTokens; break;
610    case OPT_S:
611      Opts.ProgramAction = frontend::EmitAssembly; break;
612    case OPT_emit_llvm_bc:
613      Opts.ProgramAction = frontend::EmitBC; break;
614    case OPT_emit_html:
615      Opts.ProgramAction = frontend::EmitHTML; break;
616    case OPT_emit_llvm:
617      Opts.ProgramAction = frontend::EmitLLVM; break;
618    case OPT_emit_llvm_only:
619      Opts.ProgramAction = frontend::EmitLLVMOnly; break;
620    case OPT_emit_codegen_only:
621      Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
622    case OPT_emit_obj:
623      Opts.ProgramAction = frontend::EmitObj; break;
624    case OPT_fixit_EQ:
625      Opts.FixItSuffix = A->getValue();
626      // fall-through!
627    case OPT_fixit:
628      Opts.ProgramAction = frontend::FixIt; break;
629    case OPT_emit_module:
630      Opts.ProgramAction = frontend::GenerateModule; break;
631    case OPT_emit_pch:
632      Opts.ProgramAction = frontend::GeneratePCH; break;
633    case OPT_emit_pth:
634      Opts.ProgramAction = frontend::GeneratePTH; break;
635    case OPT_init_only:
636      Opts.ProgramAction = frontend::InitOnly; break;
637    case OPT_fsyntax_only:
638      Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
639    case OPT_print_decl_contexts:
640      Opts.ProgramAction = frontend::PrintDeclContext; break;
641    case OPT_print_preamble:
642      Opts.ProgramAction = frontend::PrintPreamble; break;
643    case OPT_E:
644      Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
645    case OPT_rewrite_macros:
646      Opts.ProgramAction = frontend::RewriteMacros; break;
647    case OPT_rewrite_objc:
648      Opts.ProgramAction = frontend::RewriteObjC; break;
649    case OPT_rewrite_test:
650      Opts.ProgramAction = frontend::RewriteTest; break;
651    case OPT_analyze:
652      Opts.ProgramAction = frontend::RunAnalysis; break;
653    case OPT_migrate:
654      Opts.ProgramAction = frontend::MigrateSource; break;
655    case OPT_Eonly:
656      Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
657    }
658  }
659
660  if (const Arg* A = Args.getLastArg(OPT_plugin)) {
661    Opts.Plugins.push_back(A->getValue(0));
662    Opts.ProgramAction = frontend::PluginAction;
663    Opts.ActionName = A->getValue();
664
665    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
666           end = Args.filtered_end(); it != end; ++it) {
667      if ((*it)->getValue(0) == Opts.ActionName)
668        Opts.PluginArgs.push_back((*it)->getValue(1));
669    }
670  }
671
672  Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
673  Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
674  for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
675    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
676           end = Args.filtered_end(); it != end; ++it) {
677      if ((*it)->getValue(0) == Opts.AddPluginActions[i])
678        Opts.AddPluginArgs[i].push_back((*it)->getValue(1));
679    }
680  }
681
682  if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
683    Opts.CodeCompletionAt =
684      ParsedSourceLocation::FromString(A->getValue());
685    if (Opts.CodeCompletionAt.FileName.empty())
686      Diags.Report(diag::err_drv_invalid_value)
687        << A->getAsString(Args) << A->getValue();
688  }
689  Opts.DisableFree = Args.hasArg(OPT_disable_free);
690
691  Opts.OutputFile = Args.getLastArgValue(OPT_o);
692  Opts.Plugins = Args.getAllArgValues(OPT_load);
693  Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
694  Opts.ShowHelp = Args.hasArg(OPT_help);
695  Opts.ShowStats = Args.hasArg(OPT_print_stats);
696  Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
697  Opts.ShowVersion = Args.hasArg(OPT_version);
698  Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
699  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
700  Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
701  Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
702  Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
703  Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
704  Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
705
706  Opts.CodeCompleteOpts.IncludeMacros
707    = Args.hasArg(OPT_code_completion_macros);
708  Opts.CodeCompleteOpts.IncludeCodePatterns
709    = Args.hasArg(OPT_code_completion_patterns);
710  Opts.CodeCompleteOpts.IncludeGlobals
711    = !Args.hasArg(OPT_no_code_completion_globals);
712  Opts.CodeCompleteOpts.IncludeBriefComments
713    = Args.hasArg(OPT_code_completion_brief_comments);
714
715  Opts.OverrideRecordLayoutsFile
716    = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
717  if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
718                                     OPT_arcmt_modify,
719                                     OPT_arcmt_migrate)) {
720    switch (A->getOption().getID()) {
721    default:
722      llvm_unreachable("missed a case");
723    case OPT_arcmt_check:
724      Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
725      break;
726    case OPT_arcmt_modify:
727      Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
728      break;
729    case OPT_arcmt_migrate:
730      Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
731      break;
732    }
733  }
734  Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
735  Opts.ARCMTMigrateReportOut
736    = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
737  Opts.ARCMTMigrateEmitARCErrors
738    = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
739
740  if (Args.hasArg(OPT_objcmt_migrate_literals))
741    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
742  if (Args.hasArg(OPT_objcmt_migrate_subscripting))
743    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
744
745  if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
746      Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
747    Diags.Report(diag::err_drv_argument_not_allowed_with)
748      << "ARC migration" << "ObjC migration";
749  }
750
751  InputKind DashX = IK_None;
752  if (const Arg *A = Args.getLastArg(OPT_x)) {
753    DashX = llvm::StringSwitch<InputKind>(A->getValue())
754      .Case("c", IK_C)
755      .Case("cl", IK_OpenCL)
756      .Case("cuda", IK_CUDA)
757      .Case("c++", IK_CXX)
758      .Case("objective-c", IK_ObjC)
759      .Case("objective-c++", IK_ObjCXX)
760      .Case("cpp-output", IK_PreprocessedC)
761      .Case("assembler-with-cpp", IK_Asm)
762      .Case("c++-cpp-output", IK_PreprocessedCXX)
763      .Case("objective-c-cpp-output", IK_PreprocessedObjC)
764      .Case("objc-cpp-output", IK_PreprocessedObjC)
765      .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
766      .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
767      .Case("c-header", IK_C)
768      .Case("cl-header", IK_OpenCL)
769      .Case("objective-c-header", IK_ObjC)
770      .Case("c++-header", IK_CXX)
771      .Case("objective-c++-header", IK_ObjCXX)
772      .Case("ast", IK_AST)
773      .Case("ir", IK_LLVM_IR)
774      .Default(IK_None);
775    if (DashX == IK_None)
776      Diags.Report(diag::err_drv_invalid_value)
777        << A->getAsString(Args) << A->getValue();
778  }
779
780  // '-' is the default input if none is given.
781  std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
782  Opts.Inputs.clear();
783  if (Inputs.empty())
784    Inputs.push_back("-");
785  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
786    InputKind IK = DashX;
787    if (IK == IK_None) {
788      IK = FrontendOptions::getInputKindForExtension(
789        StringRef(Inputs[i]).rsplit('.').second);
790      // FIXME: Remove this hack.
791      if (i == 0)
792        DashX = IK;
793    }
794    Opts.Inputs.push_back(FrontendInputFile(Inputs[i], IK));
795  }
796
797  return DashX;
798}
799
800std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
801                                                 void *MainAddr) {
802  llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
803
804  if (!P.isEmpty()) {
805    P.eraseComponent();  // Remove /clang from foo/bin/clang
806    P.eraseComponent();  // Remove /bin   from foo/bin
807
808    // Get foo/lib/clang/<version>/include
809    P.appendComponent("lib");
810    P.appendComponent("clang");
811    P.appendComponent(CLANG_VERSION_STRING);
812  }
813
814  return P.str();
815}
816
817static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
818  using namespace options;
819  Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
820  Opts.Verbose = Args.hasArg(OPT_v);
821  Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
822  Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
823  Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
824  if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
825    Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
826  Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
827  Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodule_cache_path);
828  Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
829
830  // Add -I..., -F..., and -index-header-map options in order.
831  bool IsIndexHeaderMap = false;
832  for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F,
833                                             OPT_index_header_map),
834       ie = Args.filtered_end(); it != ie; ++it) {
835    if ((*it)->getOption().matches(OPT_index_header_map)) {
836      // -index-header-map applies to the next -I or -F.
837      IsIndexHeaderMap = true;
838      continue;
839    }
840
841    frontend::IncludeDirGroup Group
842      = IsIndexHeaderMap? frontend::IndexHeaderMap : frontend::Angled;
843
844    Opts.AddPath((*it)->getValue(), Group, true,
845                 /*IsFramework=*/ (*it)->getOption().matches(OPT_F), false);
846    IsIndexHeaderMap = false;
847  }
848
849  // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
850  StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
851  for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
852                                             OPT_iwithprefixbefore),
853         ie = Args.filtered_end(); it != ie; ++it) {
854    const Arg *A = *it;
855    if (A->getOption().matches(OPT_iprefix))
856      Prefix = A->getValue();
857    else if (A->getOption().matches(OPT_iwithprefix))
858      Opts.AddPath(Prefix.str() + A->getValue(),
859                   frontend::System, false, false, false);
860    else
861      Opts.AddPath(Prefix.str() + A->getValue(),
862                   frontend::Angled, false, false, false);
863  }
864
865  for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
866         ie = Args.filtered_end(); it != ie; ++it)
867    Opts.AddPath((*it)->getValue(), frontend::After, true, false, false);
868  for (arg_iterator it = Args.filtered_begin(OPT_iquote),
869         ie = Args.filtered_end(); it != ie; ++it)
870    Opts.AddPath((*it)->getValue(), frontend::Quoted, true, false, false);
871  for (arg_iterator it = Args.filtered_begin(OPT_isystem,
872         OPT_iwithsysroot), ie = Args.filtered_end(); it != ie; ++it)
873    Opts.AddPath((*it)->getValue(), frontend::System, true, false,
874                 !(*it)->getOption().matches(OPT_iwithsysroot));
875  for (arg_iterator it = Args.filtered_begin(OPT_iframework),
876         ie = Args.filtered_end(); it != ie; ++it)
877    Opts.AddPath((*it)->getValue(), frontend::System, true, true,
878                 true);
879
880  // Add the paths for the various language specific isystem flags.
881  for (arg_iterator it = Args.filtered_begin(OPT_c_isystem),
882       ie = Args.filtered_end(); it != ie; ++it)
883    Opts.AddPath((*it)->getValue(), frontend::CSystem, true, false, true);
884  for (arg_iterator it = Args.filtered_begin(OPT_cxx_isystem),
885       ie = Args.filtered_end(); it != ie; ++it)
886    Opts.AddPath((*it)->getValue(), frontend::CXXSystem, true, false, true);
887  for (arg_iterator it = Args.filtered_begin(OPT_objc_isystem),
888       ie = Args.filtered_end(); it != ie; ++it)
889    Opts.AddPath((*it)->getValue(), frontend::ObjCSystem, true, false,true);
890  for (arg_iterator it = Args.filtered_begin(OPT_objcxx_isystem),
891       ie = Args.filtered_end(); it != ie; ++it)
892    Opts.AddPath((*it)->getValue(), frontend::ObjCXXSystem, true, false,
893                 true);
894
895  // Add the internal paths from a driver that detects standard include paths.
896  for (arg_iterator I = Args.filtered_begin(OPT_internal_isystem,
897                                            OPT_internal_externc_isystem),
898                    E = Args.filtered_end();
899       I != E; ++I)
900    Opts.AddPath((*I)->getValue(), frontend::System,
901                 false, false, /*IgnoreSysRoot=*/true, /*IsInternal=*/true,
902                 (*I)->getOption().matches(OPT_internal_externc_isystem));
903
904  // Add the path prefixes which are implicitly treated as being system headers.
905  for (arg_iterator I = Args.filtered_begin(OPT_isystem_prefix,
906                                            OPT_ino_system_prefix),
907                    E = Args.filtered_end();
908       I != E; ++I)
909    Opts.AddSystemHeaderPrefix((*I)->getValue(),
910                               (*I)->getOption().matches(OPT_isystem_prefix));
911}
912
913void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
914                                         LangStandard::Kind LangStd) {
915  // Set some properties which depend solely on the input kind; it would be nice
916  // to move these to the language standard, and have the driver resolve the
917  // input kind + language standard.
918  if (IK == IK_Asm) {
919    Opts.AsmPreprocessor = 1;
920  } else if (IK == IK_ObjC ||
921             IK == IK_ObjCXX ||
922             IK == IK_PreprocessedObjC ||
923             IK == IK_PreprocessedObjCXX) {
924    Opts.ObjC1 = Opts.ObjC2 = 1;
925  }
926
927  if (LangStd == LangStandard::lang_unspecified) {
928    // Based on the base language, pick one.
929    switch (IK) {
930    case IK_None:
931    case IK_AST:
932    case IK_LLVM_IR:
933      llvm_unreachable("Invalid input kind!");
934    case IK_OpenCL:
935      LangStd = LangStandard::lang_opencl;
936      break;
937    case IK_CUDA:
938      LangStd = LangStandard::lang_cuda;
939      break;
940    case IK_Asm:
941    case IK_C:
942    case IK_PreprocessedC:
943    case IK_ObjC:
944    case IK_PreprocessedObjC:
945      LangStd = LangStandard::lang_gnu99;
946      break;
947    case IK_CXX:
948    case IK_PreprocessedCXX:
949    case IK_ObjCXX:
950    case IK_PreprocessedObjCXX:
951      LangStd = LangStandard::lang_gnucxx98;
952      break;
953    }
954  }
955
956  const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
957  Opts.LineComment = Std.hasLineComments();
958  Opts.C99 = Std.isC99();
959  Opts.C11 = Std.isC11();
960  Opts.CPlusPlus = Std.isCPlusPlus();
961  Opts.CPlusPlus0x = Std.isCPlusPlus0x();
962  Opts.CPlusPlus1y = Std.isCPlusPlus1y();
963  Opts.Digraphs = Std.hasDigraphs();
964  Opts.GNUMode = Std.isGNUMode();
965  Opts.GNUInline = !Std.isC99();
966  Opts.HexFloats = Std.hasHexFloats();
967  Opts.ImplicitInt = Std.hasImplicitInt();
968
969  // Set OpenCL Version.
970  if (LangStd == LangStandard::lang_opencl) {
971    Opts.OpenCL = 1;
972    Opts.OpenCLVersion = 100;
973  }
974  else if (LangStd == LangStandard::lang_opencl11) {
975      Opts.OpenCL = 1;
976      Opts.OpenCLVersion = 110;
977  }
978  else if (LangStd == LangStandard::lang_opencl12) {
979    Opts.OpenCL = 1;
980    Opts.OpenCLVersion = 120;
981  }
982
983  // OpenCL has some additional defaults.
984  if (Opts.OpenCL) {
985    Opts.AltiVec = 0;
986    Opts.CXXOperatorNames = 1;
987    Opts.LaxVectorConversions = 0;
988    Opts.DefaultFPContract = 1;
989  }
990
991  if (LangStd == LangStandard::lang_cuda)
992    Opts.CUDA = 1;
993
994  // OpenCL and C++ both have bool, true, false keywords.
995  Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
996
997  // C++ has wchar_t keyword.
998  Opts.WChar = Opts.CPlusPlus;
999
1000  Opts.GNUKeywords = Opts.GNUMode;
1001  Opts.CXXOperatorNames = Opts.CPlusPlus;
1002
1003  // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1004  // is specified, or -std is set to a conforming mode.
1005  Opts.Trigraphs = !Opts.GNUMode;
1006
1007  Opts.DollarIdents = !Opts.AsmPreprocessor;
1008}
1009
1010static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1011                          DiagnosticsEngine &Diags) {
1012  // FIXME: Cleanup per-file based stuff.
1013  LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1014  if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1015    LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1016#define LANGSTANDARD(id, name, desc, features) \
1017      .Case(name, LangStandard::lang_##id)
1018#include "clang/Frontend/LangStandards.def"
1019      .Default(LangStandard::lang_unspecified);
1020    if (LangStd == LangStandard::lang_unspecified)
1021      Diags.Report(diag::err_drv_invalid_value)
1022        << A->getAsString(Args) << A->getValue();
1023    else {
1024      // Valid standard, check to make sure language and standard are compatable.
1025      const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1026      switch (IK) {
1027      case IK_C:
1028      case IK_ObjC:
1029      case IK_PreprocessedC:
1030      case IK_PreprocessedObjC:
1031        if (!(Std.isC89() || Std.isC99()))
1032          Diags.Report(diag::err_drv_argument_not_allowed_with)
1033            << A->getAsString(Args) << "C/ObjC";
1034        break;
1035      case IK_CXX:
1036      case IK_ObjCXX:
1037      case IK_PreprocessedCXX:
1038      case IK_PreprocessedObjCXX:
1039        if (!Std.isCPlusPlus())
1040          Diags.Report(diag::err_drv_argument_not_allowed_with)
1041            << A->getAsString(Args) << "C++/ObjC++";
1042        break;
1043      case IK_OpenCL:
1044        if (!Std.isC99())
1045          Diags.Report(diag::err_drv_argument_not_allowed_with)
1046            << A->getAsString(Args) << "OpenCL";
1047        break;
1048      case IK_CUDA:
1049        if (!Std.isCPlusPlus())
1050          Diags.Report(diag::err_drv_argument_not_allowed_with)
1051            << A->getAsString(Args) << "CUDA";
1052        break;
1053      default:
1054        break;
1055      }
1056    }
1057  }
1058
1059  // -cl-std only applies for OpenCL language standards.
1060  // Override the -std option in this case.
1061  if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1062    LangStandard::Kind OpenCLLangStd
1063    = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1064    .Case("CL", LangStandard::lang_opencl)
1065    .Case("CL1.1", LangStandard::lang_opencl11)
1066    .Case("CL1.2", LangStandard::lang_opencl12)
1067    .Default(LangStandard::lang_unspecified);
1068
1069    if (OpenCLLangStd == LangStandard::lang_unspecified) {
1070      Diags.Report(diag::err_drv_invalid_value)
1071      << A->getAsString(Args) << A->getValue();
1072    }
1073    else
1074      LangStd = OpenCLLangStd;
1075  }
1076
1077  CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1078
1079  // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1080  // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1081  // while a subset (the non-C++ GNU keywords) is provided by GCC's
1082  // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1083  // name, as it doesn't seem a useful distinction.
1084  Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1085                                  Opts.GNUKeywords);
1086
1087  if (Args.hasArg(OPT_fno_operator_names))
1088    Opts.CXXOperatorNames = 0;
1089
1090  if (Opts.ObjC1) {
1091    if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1092      StringRef value = arg->getValue();
1093      if (Opts.ObjCRuntime.tryParse(value))
1094        Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1095    }
1096
1097    if (Args.hasArg(OPT_fobjc_gc_only))
1098      Opts.setGC(LangOptions::GCOnly);
1099    else if (Args.hasArg(OPT_fobjc_gc))
1100      Opts.setGC(LangOptions::HybridGC);
1101    else if (Args.hasArg(OPT_fobjc_arc)) {
1102      Opts.ObjCAutoRefCount = 1;
1103      if (!Opts.ObjCRuntime.allowsARC())
1104        Diags.Report(diag::err_arc_unsupported_on_runtime);
1105
1106      // Only set ObjCARCWeak if ARC is enabled.
1107      if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1108        Opts.ObjCARCWeak = 1;
1109      else
1110        Opts.ObjCARCWeak = Opts.ObjCRuntime.allowsWeak();
1111    }
1112
1113    if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1114      Opts.ObjCInferRelatedResultType = 0;
1115  }
1116
1117  if (Args.hasArg(OPT_fgnu89_inline))
1118    Opts.GNUInline = 1;
1119
1120  if (Args.hasArg(OPT_fapple_kext)) {
1121    if (!Opts.CPlusPlus)
1122      Diags.Report(diag::warn_c_kext);
1123    else
1124      Opts.AppleKext = 1;
1125  }
1126
1127  if (Args.hasArg(OPT_print_ivar_layout))
1128    Opts.ObjCGCBitmapPrint = 1;
1129  if (Args.hasArg(OPT_fno_constant_cfstrings))
1130    Opts.NoConstantCFStrings = 1;
1131
1132  if (Args.hasArg(OPT_faltivec))
1133    Opts.AltiVec = 1;
1134
1135  if (Args.hasArg(OPT_pthread))
1136    Opts.POSIXThreads = 1;
1137
1138  if (Args.hasArg(OPT_fdelayed_template_parsing))
1139    Opts.DelayedTemplateParsing = 1;
1140
1141  StringRef Vis = Args.getLastArgValue(OPT_fvisibility, "default");
1142  if (Vis == "default")
1143    Opts.setVisibilityMode(DefaultVisibility);
1144  else if (Vis == "hidden")
1145    Opts.setVisibilityMode(HiddenVisibility);
1146  else if (Vis == "protected")
1147    // FIXME: diagnose if target does not support protected visibility
1148    Opts.setVisibilityMode(ProtectedVisibility);
1149  else
1150    Diags.Report(diag::err_drv_invalid_value)
1151      << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1152
1153  if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1154    Opts.InlineVisibilityHidden = 1;
1155
1156  if (Args.hasArg(OPT_ftrapv)) {
1157    Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1158    // Set the handler, if one is specified.
1159    Opts.OverflowHandler =
1160        Args.getLastArgValue(OPT_ftrapv_handler);
1161  }
1162  else if (Args.hasArg(OPT_fwrapv))
1163    Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1164
1165  if (Args.hasArg(OPT_trigraphs))
1166    Opts.Trigraphs = 1;
1167
1168  Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1169                                   OPT_fno_dollars_in_identifiers,
1170                                   Opts.DollarIdents);
1171  Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1172  Opts.MicrosoftExt
1173    = Args.hasArg(OPT_fms_extensions) || Args.hasArg(OPT_fms_compatibility);
1174  Opts.MicrosoftMode = Args.hasArg(OPT_fms_compatibility);
1175  Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks);
1176  Opts.MSCVersion = Args.getLastArgIntValue(OPT_fmsc_version, 0, Diags);
1177  Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1178  Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1179  Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
1180                                   Opts.ConstStrings);
1181  if (Args.hasArg(OPT_fno_lax_vector_conversions))
1182    Opts.LaxVectorConversions = 0;
1183  if (Args.hasArg(OPT_fno_threadsafe_statics))
1184    Opts.ThreadsafeStatics = 0;
1185  Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1186  Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
1187  Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
1188  Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1189  Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
1190
1191  Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1192  Opts.Blocks = Args.hasArg(OPT_fblocks);
1193  Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
1194  Opts.Modules = Args.hasArg(OPT_fmodules);
1195  Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1196  Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
1197  Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1198  Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1199  Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1200  Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1201  Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1202  Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1203  Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1204  Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1205  Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1206  Opts.InstantiationDepth = Args.getLastArgIntValue(OPT_ftemplate_depth, 512,
1207                                                    Diags);
1208  Opts.ConstexprCallDepth = Args.getLastArgIntValue(OPT_fconstexpr_depth, 512,
1209                                                    Diags);
1210  Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
1211  Opts.NumLargeByValueCopy = Args.getLastArgIntValue(OPT_Wlarge_by_value_copy_EQ,
1212                                                    0, Diags);
1213  Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
1214  Opts.ObjCConstantStringClass =
1215    Args.getLastArgValue(OPT_fconstant_string_class);
1216  Opts.ObjCDefaultSynthProperties =
1217    Args.hasArg(OPT_fobjc_default_synthesize_properties);
1218  Opts.EncodeExtendedBlockSig =
1219    Args.hasArg(OPT_fencode_extended_block_signature);
1220  Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1221  Opts.PackStruct = Args.getLastArgIntValue(OPT_fpack_struct_EQ, 0, Diags);
1222  Opts.PICLevel = Args.getLastArgIntValue(OPT_pic_level, 0, Diags);
1223  Opts.PIELevel = Args.getLastArgIntValue(OPT_pie_level, 0, Diags);
1224  Opts.Static = Args.hasArg(OPT_static_define);
1225  Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
1226  Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
1227                        || Args.hasArg(OPT_fdump_record_layouts);
1228  Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1229  Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1230  Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1231  Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
1232  Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
1233  Opts.MRTD = Args.hasArg(OPT_mrtd);
1234  Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
1235  Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
1236  Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
1237  Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
1238  Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
1239  Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
1240  Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
1241  Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
1242
1243  // Record whether the __DEPRECATED define was requested.
1244  Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
1245                                 OPT_fno_deprecated_macro,
1246                                 Opts.Deprecated);
1247
1248  // FIXME: Eliminate this dependency.
1249  unsigned Opt = getOptimizationLevel(Args, IK, Diags),
1250       OptSize = getOptimizationLevelSize(Args, IK, Diags);
1251  Opts.Optimize = Opt != 0;
1252  Opts.OptimizeSize = OptSize != 0;
1253
1254  // This is the __NO_INLINE__ define, which just depends on things like the
1255  // optimization level and -fno-inline, not actually whether the backend has
1256  // inlining enabled.
1257  Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
1258
1259  Opts.FastMath = Args.hasArg(OPT_ffast_math);
1260  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only);
1261
1262  Opts.EmitMicrosoftInlineAsm = Args.hasArg(OPT_fenable_experimental_ms_inline_asm);
1263
1264  Opts.RetainCommentsFromSystemHeaders =
1265      Args.hasArg(OPT_fretain_comments_from_system_headers);
1266
1267  unsigned SSP = Args.getLastArgIntValue(OPT_stack_protector, 0, Diags);
1268  switch (SSP) {
1269  default:
1270    Diags.Report(diag::err_drv_invalid_value)
1271      << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1272    break;
1273  case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
1274  case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
1275  case 2: Opts.setStackProtector(LangOptions::SSPReq); break;
1276  }
1277
1278  // Parse -fsanitize= arguments.
1279  std::vector<std::string> Sanitizers = Args.getAllArgValues(OPT_fsanitize_EQ);
1280  for (unsigned I = 0, N = Sanitizers.size(); I != N; ++I) {
1281    // Since the Opts.Sanitize* values are bitfields, it's a little tricky to
1282    // efficiently map string values to them. Perform the mapping indirectly:
1283    // convert strings to enumerated values, then switch over the enum to set
1284    // the right bitfield value.
1285    enum Sanitizer {
1286#define SANITIZER(NAME, ID) \
1287      ID,
1288#include "clang/Basic/Sanitizers.def"
1289      Unknown
1290    };
1291    switch (llvm::StringSwitch<unsigned>(Sanitizers[I])
1292#define SANITIZER(NAME, ID) \
1293              .Case(NAME, ID)
1294#include "clang/Basic/Sanitizers.def"
1295              .Default(Unknown)) {
1296#define SANITIZER(NAME, ID) \
1297    case ID: \
1298      Opts.Sanitize##ID = true; \
1299      break;
1300#include "clang/Basic/Sanitizers.def"
1301
1302    case Unknown:
1303      Diags.Report(diag::err_drv_invalid_value)
1304        << "-fsanitize=" << Sanitizers[I];
1305      break;
1306    }
1307  }
1308}
1309
1310static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1311                                  FileManager &FileMgr,
1312                                  DiagnosticsEngine &Diags) {
1313  using namespace options;
1314  Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1315  Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1316  if (const Arg *A = Args.getLastArg(OPT_token_cache))
1317      Opts.TokenCache = A->getValue();
1318  else
1319    Opts.TokenCache = Opts.ImplicitPTHInclude;
1320  Opts.UsePredefines = !Args.hasArg(OPT_undef);
1321  Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1322  Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1323
1324  Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
1325  for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
1326         ie = Args.filtered_end(); it != ie; ++it) {
1327    const Arg *A = *it;
1328    Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
1329  }
1330
1331  if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1332    StringRef Value(A->getValue());
1333    size_t Comma = Value.find(',');
1334    unsigned Bytes = 0;
1335    unsigned EndOfLine = 0;
1336
1337    if (Comma == StringRef::npos ||
1338        Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1339        Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1340      Diags.Report(diag::err_drv_preamble_format);
1341    else {
1342      Opts.PrecompiledPreambleBytes.first = Bytes;
1343      Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1344    }
1345  }
1346
1347  // Add macros from the command line.
1348  for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1349         ie = Args.filtered_end(); it != ie; ++it) {
1350    if ((*it)->getOption().matches(OPT_D))
1351      Opts.addMacroDef((*it)->getValue());
1352    else
1353      Opts.addMacroUndef((*it)->getValue());
1354  }
1355
1356  Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1357
1358  // Add the ordered list of -includes.
1359  for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1360                                             OPT_include_pth),
1361         ie = Args.filtered_end(); it != ie; ++it) {
1362    const Arg *A = *it;
1363    Opts.Includes.push_back(A->getValue());
1364  }
1365
1366  for (arg_iterator it = Args.filtered_begin(OPT_chain_include),
1367         ie = Args.filtered_end(); it != ie; ++it) {
1368    const Arg *A = *it;
1369    Opts.ChainedIncludes.push_back(A->getValue());
1370  }
1371
1372  // Include 'altivec.h' if -faltivec option present
1373  if (Args.hasArg(OPT_faltivec))
1374    Opts.Includes.push_back("altivec.h");
1375
1376  for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1377         ie = Args.filtered_end(); it != ie; ++it) {
1378    const Arg *A = *it;
1379    std::pair<StringRef,StringRef> Split =
1380      StringRef(A->getValue()).split(';');
1381
1382    if (Split.second.empty()) {
1383      Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1384      continue;
1385    }
1386
1387    Opts.addRemappedFile(Split.first, Split.second);
1388  }
1389
1390  if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
1391    StringRef Name = A->getValue();
1392    unsigned Library = llvm::StringSwitch<unsigned>(Name)
1393      .Case("libc++", ARCXX_libcxx)
1394      .Case("libstdc++", ARCXX_libstdcxx)
1395      .Case("none", ARCXX_nolib)
1396      .Default(~0U);
1397    if (Library == ~0U)
1398      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1399    else
1400      Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
1401  }
1402}
1403
1404static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1405                                        ArgList &Args) {
1406  using namespace options;
1407  Opts.ShowCPP = !Args.hasArg(OPT_dM);
1408  Opts.ShowComments = Args.hasArg(OPT_C);
1409  Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1410  Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1411  Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1412  Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
1413}
1414
1415static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1416  using namespace options;
1417  Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1418  Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
1419  Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1420  Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
1421  Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1422  Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1423
1424  // Use the default target triple if unspecified.
1425  if (Opts.Triple.empty())
1426    Opts.Triple = llvm::sys::getDefaultTargetTriple();
1427}
1428
1429//
1430
1431bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1432                                        const char *const *ArgBegin,
1433                                        const char *const *ArgEnd,
1434                                        DiagnosticsEngine &Diags) {
1435  bool Success = true;
1436
1437  // Parse the arguments.
1438  OwningPtr<OptTable> Opts(createDriverOptTable());
1439  unsigned MissingArgIndex, MissingArgCount;
1440  OwningPtr<InputArgList> Args(
1441    Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1442
1443  // Check for missing argument error.
1444  if (MissingArgCount) {
1445    Diags.Report(diag::err_drv_missing_argument)
1446      << Args->getArgString(MissingArgIndex) << MissingArgCount;
1447    Success = false;
1448  }
1449
1450  // Issue errors on unknown arguments.
1451  for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1452         ie = Args->filtered_end(); it != ie; ++it) {
1453    Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
1454    Success = false;
1455  }
1456
1457  // Issue errors on arguments that are not valid for CC1.
1458  for (ArgList::iterator I = Args->begin(), E = Args->end();
1459       I != E; ++I) {
1460    if (!(*I)->getOption().hasFlag(options::CC1Option)) {
1461      Diags.Report(diag::err_drv_unknown_argument) << (*I)->getAsString(*Args);
1462      Success = false;
1463    }
1464  }
1465
1466  Success = ParseAnalyzerArgs(*Res.getAnalyzerOpts(), *Args, Diags) && Success;
1467  Success = ParseMigratorArgs(Res.getMigratorOpts(), *Args) && Success;
1468  ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1469  Success = ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, &Diags)
1470            && Success;
1471  ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
1472  // FIXME: We shouldn't have to pass the DashX option around here
1473  InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1474  Success = ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags)
1475            && Success;
1476  ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1477  if (DashX != IK_AST && DashX != IK_LLVM_IR) {
1478    ParseLangArgs(*Res.getLangOpts(), *Args, DashX, Diags);
1479    if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
1480      Res.getLangOpts()->ObjCExceptions = 1;
1481  }
1482  // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
1483  // PCH file and find the original header name. Remove the need to do that in
1484  // ParsePreprocessorArgs and remove the FileManager
1485  // parameters from the function and the "FileManager.h" #include.
1486  FileManager FileMgr(Res.getFileSystemOpts());
1487  ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
1488  ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
1489  ParseTargetArgs(Res.getTargetOpts(), *Args);
1490
1491  return Success;
1492}
1493
1494namespace {
1495
1496  class ModuleSignature {
1497    llvm::SmallVector<uint64_t, 16> Data;
1498    unsigned CurBit;
1499    uint64_t CurValue;
1500
1501  public:
1502    ModuleSignature() : CurBit(0), CurValue(0) { }
1503
1504    void add(uint64_t Value, unsigned Bits);
1505    void add(StringRef Value);
1506    void flush();
1507
1508    llvm::APInt getAsInteger() const;
1509  };
1510}
1511
1512void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
1513  CurValue |= Value << CurBit;
1514  if (CurBit + NumBits < 64) {
1515    CurBit += NumBits;
1516    return;
1517  }
1518
1519  // Add the current word.
1520  Data.push_back(CurValue);
1521
1522  if (CurBit)
1523    CurValue = Value >> (64-CurBit);
1524  else
1525    CurValue = 0;
1526  CurBit = (CurBit+NumBits) & 63;
1527}
1528
1529void ModuleSignature::flush() {
1530  if (CurBit == 0)
1531    return;
1532
1533  Data.push_back(CurValue);
1534  CurBit = 0;
1535  CurValue = 0;
1536}
1537
1538void ModuleSignature::add(StringRef Value) {
1539  for (StringRef::iterator I = Value.begin(), IEnd = Value.end(); I != IEnd;++I)
1540    add(*I, 8);
1541}
1542
1543llvm::APInt ModuleSignature::getAsInteger() const {
1544  return llvm::APInt(Data.size() * 64, Data);
1545}
1546
1547std::string CompilerInvocation::getModuleHash() const {
1548  using llvm::hash_code;
1549  using llvm::hash_value;
1550  using llvm::hash_combine;
1551
1552  // Start the signature with the compiler version.
1553  // FIXME: We'd rather use something more cryptographically sound than
1554  // CityHash, but this will do for now.
1555  hash_code code = hash_value(getClangFullRepositoryVersion());
1556
1557  // Extend the signature with the language options
1558#define LANGOPT(Name, Bits, Default, Description) \
1559   code = hash_combine(code, LangOpts->Name);
1560#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
1561  code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
1562#define BENIGN_LANGOPT(Name, Bits, Default, Description)
1563#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
1564#include "clang/Basic/LangOptions.def"
1565
1566  // Extend the signature with the target options.
1567  code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
1568                      TargetOpts->ABI, TargetOpts->CXXABI,
1569                      TargetOpts->LinkerVersion);
1570  for (unsigned i = 0, n = TargetOpts->FeaturesAsWritten.size(); i != n; ++i)
1571    code = hash_combine(code, TargetOpts->FeaturesAsWritten[i]);
1572
1573  // Extend the signature with preprocessor options.
1574  const PreprocessorOptions &ppOpts = getPreprocessorOpts();
1575  code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
1576
1577  std::vector<StringRef> MacroDefs;
1578  for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
1579            I = getPreprocessorOpts().Macros.begin(),
1580         IEnd = getPreprocessorOpts().Macros.end();
1581       I != IEnd; ++I) {
1582    code = hash_combine(code, I->first, I->second);
1583  }
1584
1585  // Extend the signature with the sysroot.
1586  const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
1587  code = hash_combine(code, hsOpts.Sysroot, hsOpts.UseBuiltinIncludes,
1588                      hsOpts.UseStandardSystemIncludes,
1589                      hsOpts.UseStandardCXXIncludes,
1590                      hsOpts.UseLibcxx);
1591
1592  return llvm::APInt(64, code).toString(36, /*Signed=*/false);
1593}
1594