CompilerInvocation.cpp revision 2d382d149b442b928fd3fb8edcc8d82ea9325872 
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    llvm::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.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
336  Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
337  Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
338  Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
339    OPT_fuse_register_sized_bitfield_access);
340  Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
341  Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
342  Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
343  Opts.NoCommon = Args.hasArg(OPT_fno_common);
344  Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
345  Opts.OptimizeSize = getOptimizationLevelSize(Args, IK, Diags);
346  Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
347                            Args.hasArg(OPT_ffreestanding));
348  Opts.UnrollLoops = Args.hasArg(OPT_funroll_loops) ||
349                     (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
350
351  Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
352  Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
353  Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);
354  Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
355  Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
356  Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
357  Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
358  Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
359  Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
360  Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
361  Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
362  Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
363  Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
364  Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
365                       Args.hasArg(OPT_cl_finite_math_only)||
366                       Args.hasArg(OPT_cl_fast_relaxed_math));
367  Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
368                       Args.hasArg(OPT_cl_finite_math_only)||
369                       Args.hasArg(OPT_cl_fast_relaxed_math));
370  Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
371  Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
372  Opts.NumRegisterParameters = Args.getLastArgIntValue(OPT_mregparm, 0, Diags);
373  Opts.NoGlobalMerge = Args.hasArg(OPT_mno_global_merge);
374  Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
375  Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
376  Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
377  Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
378  Opts.NoDwarf2CFIAsm = Args.hasArg(OPT_fno_dwarf2_cfi_asm);
379  Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
380  Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
381  Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
382  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
383                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
384                      Args.hasArg(OPT_cl_fast_relaxed_math);
385  Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
386  Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
387  Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
388  Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
389
390  Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
391  Opts.DataSections = Args.hasArg(OPT_fdata_sections);
392
393  Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
394  Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
395  Opts.SanitizeRecover = !Args.hasArg(OPT_fno_sanitize_recover);
396
397  Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
398  Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
399  Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
400  Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
401  Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
402  Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
403  Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
404  Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
405  Opts.SanitizerBlacklistFile = Args.getLastArgValue(OPT_fsanitize_blacklist);
406  Opts.MemorySanitizerTrackOrigins =
407    Args.hasArg(OPT_fsanitize_memory_track_origins);
408  Opts.SSPBufferSize =
409    Args.getLastArgIntValue(OPT_stack_protector_buffer_size, 8, Diags);
410  Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
411  if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
412    StringRef Val = A->getValue();
413    unsigned StackAlignment = Opts.StackAlignment;
414    Val.getAsInteger(10, StackAlignment);
415    Opts.StackAlignment = StackAlignment;
416  }
417
418  if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
419    StringRef Name = A->getValue();
420    unsigned Method = llvm::StringSwitch<unsigned>(Name)
421      .Case("legacy", CodeGenOptions::Legacy)
422      .Case("non-legacy", CodeGenOptions::NonLegacy)
423      .Case("mixed", CodeGenOptions::Mixed)
424      .Default(~0U);
425    if (Method == ~0U) {
426      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
427      Success = false;
428    } else {
429      Opts.setObjCDispatchMethod(
430        static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
431    }
432  }
433
434  if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
435    StringRef Name = A->getValue();
436    unsigned Model = llvm::StringSwitch<unsigned>(Name)
437        .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
438        .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
439        .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
440        .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
441        .Default(~0U);
442    if (Model == ~0U) {
443      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
444      Success = false;
445    } else {
446      Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
447    }
448  }
449
450  if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
451    StringRef Val = A->getValue();
452    if (Val == "fast")
453      Opts.setFPContractMode(CodeGenOptions::FPC_Fast);
454    else if (Val == "on")
455      Opts.setFPContractMode(CodeGenOptions::FPC_On);
456    else if (Val == "off")
457      Opts.setFPContractMode(CodeGenOptions::FPC_Off);
458    else
459      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
460  }
461
462  return Success;
463}
464
465static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
466                                      ArgList &Args) {
467  using namespace options;
468  Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
469  Opts.Targets = Args.getAllArgValues(OPT_MT);
470  Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
471  Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
472  Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
473  Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
474  Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
475  Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
476}
477
478bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
479                                DiagnosticsEngine *Diags) {
480  using namespace options;
481  bool Success = true;
482
483  Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
484  Opts.DiagnosticSerializationFile =
485    Args.getLastArgValue(OPT_diagnostic_serialized_file);
486  Opts.IgnoreWarnings = Args.hasArg(OPT_w);
487  Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
488  Opts.Pedantic = Args.hasArg(OPT_pedantic);
489  Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
490  Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
491  Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
492  Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
493                                 OPT_fno_show_column,
494                                 /*Default=*/true);
495  Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
496  Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
497  Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
498
499  // Default behavior is to not to show note include stacks.
500  Opts.ShowNoteIncludeStack = false;
501  if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
502                               OPT_fno_diagnostics_show_note_include_stack))
503    if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
504      Opts.ShowNoteIncludeStack = true;
505
506  StringRef ShowOverloads =
507    Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
508  if (ShowOverloads == "best")
509    Opts.setShowOverloads(Ovl_Best);
510  else if (ShowOverloads == "all")
511    Opts.setShowOverloads(Ovl_All);
512  else {
513    Success = false;
514    if (Diags)
515      Diags->Report(diag::err_drv_invalid_value)
516      << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
517      << ShowOverloads;
518  }
519
520  StringRef ShowCategory =
521    Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
522  if (ShowCategory == "none")
523    Opts.ShowCategories = 0;
524  else if (ShowCategory == "id")
525    Opts.ShowCategories = 1;
526  else if (ShowCategory == "name")
527    Opts.ShowCategories = 2;
528  else {
529    Success = false;
530    if (Diags)
531      Diags->Report(diag::err_drv_invalid_value)
532      << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
533      << ShowCategory;
534  }
535
536  StringRef Format =
537    Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
538  if (Format == "clang")
539    Opts.setFormat(DiagnosticOptions::Clang);
540  else if (Format == "msvc")
541    Opts.setFormat(DiagnosticOptions::Msvc);
542  else if (Format == "vi")
543    Opts.setFormat(DiagnosticOptions::Vi);
544  else {
545    Success = false;
546    if (Diags)
547      Diags->Report(diag::err_drv_invalid_value)
548      << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
549      << Format;
550  }
551
552  Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
553  Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
554  Opts.ShowPresumedLoc = !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
555  Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
556  Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
557  Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
558  Opts.ErrorLimit = Args.getLastArgIntValue(OPT_ferror_limit, 0, Diags);
559  Opts.MacroBacktraceLimit
560    = Args.getLastArgIntValue(OPT_fmacro_backtrace_limit,
561                         DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
562  Opts.TemplateBacktraceLimit
563    = Args.getLastArgIntValue(OPT_ftemplate_backtrace_limit,
564                         DiagnosticOptions::DefaultTemplateBacktraceLimit,
565                         Diags);
566  Opts.ConstexprBacktraceLimit
567    = Args.getLastArgIntValue(OPT_fconstexpr_backtrace_limit,
568                         DiagnosticOptions::DefaultConstexprBacktraceLimit,
569                         Diags);
570  Opts.TabStop = Args.getLastArgIntValue(OPT_ftabstop,
571                                    DiagnosticOptions::DefaultTabStop, Diags);
572  if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
573    Opts.TabStop = DiagnosticOptions::DefaultTabStop;
574    if (Diags)
575      Diags->Report(diag::warn_ignoring_ftabstop_value)
576      << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
577  }
578  Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
579  Opts.DumpBuildInformation = Args.getLastArgValue(OPT_dump_build_information);
580  addWarningArgs(Args, Opts.Warnings);
581
582  return Success;
583}
584
585static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
586  Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
587}
588
589static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
590                                   DiagnosticsEngine &Diags) {
591  using namespace options;
592  Opts.ProgramAction = frontend::ParseSyntaxOnly;
593  if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
594    switch (A->getOption().getID()) {
595    default:
596      llvm_unreachable("Invalid option in group!");
597    case OPT_ast_list:
598      Opts.ProgramAction = frontend::ASTDeclList; break;
599    case OPT_ast_dump:
600      Opts.ProgramAction = frontend::ASTDump; break;
601    case OPT_ast_dump_xml:
602      Opts.ProgramAction = frontend::ASTDumpXML; break;
603    case OPT_ast_print:
604      Opts.ProgramAction = frontend::ASTPrint; break;
605    case OPT_ast_view:
606      Opts.ProgramAction = frontend::ASTView; break;
607    case OPT_dump_raw_tokens:
608      Opts.ProgramAction = frontend::DumpRawTokens; break;
609    case OPT_dump_tokens:
610      Opts.ProgramAction = frontend::DumpTokens; break;
611    case OPT_S:
612      Opts.ProgramAction = frontend::EmitAssembly; break;
613    case OPT_emit_llvm_bc:
614      Opts.ProgramAction = frontend::EmitBC; break;
615    case OPT_emit_html:
616      Opts.ProgramAction = frontend::EmitHTML; break;
617    case OPT_emit_llvm:
618      Opts.ProgramAction = frontend::EmitLLVM; break;
619    case OPT_emit_llvm_only:
620      Opts.ProgramAction = frontend::EmitLLVMOnly; break;
621    case OPT_emit_codegen_only:
622      Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
623    case OPT_emit_obj:
624      Opts.ProgramAction = frontend::EmitObj; break;
625    case OPT_fixit_EQ:
626      Opts.FixItSuffix = A->getValue();
627      // fall-through!
628    case OPT_fixit:
629      Opts.ProgramAction = frontend::FixIt; break;
630    case OPT_emit_module:
631      Opts.ProgramAction = frontend::GenerateModule; break;
632    case OPT_emit_pch:
633      Opts.ProgramAction = frontend::GeneratePCH; break;
634    case OPT_emit_pth:
635      Opts.ProgramAction = frontend::GeneratePTH; break;
636    case OPT_init_only:
637      Opts.ProgramAction = frontend::InitOnly; break;
638    case OPT_fsyntax_only:
639      Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
640    case OPT_print_decl_contexts:
641      Opts.ProgramAction = frontend::PrintDeclContext; break;
642    case OPT_print_preamble:
643      Opts.ProgramAction = frontend::PrintPreamble; break;
644    case OPT_E:
645      Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
646    case OPT_rewrite_macros:
647      Opts.ProgramAction = frontend::RewriteMacros; break;
648    case OPT_rewrite_objc:
649      Opts.ProgramAction = frontend::RewriteObjC; break;
650    case OPT_rewrite_test:
651      Opts.ProgramAction = frontend::RewriteTest; break;
652    case OPT_analyze:
653      Opts.ProgramAction = frontend::RunAnalysis; break;
654    case OPT_migrate:
655      Opts.ProgramAction = frontend::MigrateSource; break;
656    case OPT_Eonly:
657      Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
658    }
659  }
660
661  if (const Arg* A = Args.getLastArg(OPT_plugin)) {
662    Opts.Plugins.push_back(A->getValue(0));
663    Opts.ProgramAction = frontend::PluginAction;
664    Opts.ActionName = A->getValue();
665
666    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
667           end = Args.filtered_end(); it != end; ++it) {
668      if ((*it)->getValue(0) == Opts.ActionName)
669        Opts.PluginArgs.push_back((*it)->getValue(1));
670    }
671  }
672
673  Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
674  Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
675  for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
676    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
677           end = Args.filtered_end(); it != end; ++it) {
678      if ((*it)->getValue(0) == Opts.AddPluginActions[i])
679        Opts.AddPluginArgs[i].push_back((*it)->getValue(1));
680    }
681  }
682
683  if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
684    Opts.CodeCompletionAt =
685      ParsedSourceLocation::FromString(A->getValue());
686    if (Opts.CodeCompletionAt.FileName.empty())
687      Diags.Report(diag::err_drv_invalid_value)
688        << A->getAsString(Args) << A->getValue();
689  }
690  Opts.DisableFree = Args.hasArg(OPT_disable_free);
691
692  Opts.OutputFile = Args.getLastArgValue(OPT_o);
693  Opts.Plugins = Args.getAllArgValues(OPT_load);
694  Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
695  Opts.ShowHelp = Args.hasArg(OPT_help);
696  Opts.ShowStats = Args.hasArg(OPT_print_stats);
697  Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
698  Opts.ShowVersion = Args.hasArg(OPT_version);
699  Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
700  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
701  Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
702  Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
703  Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
704  Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
705  Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
706
707  Opts.CodeCompleteOpts.IncludeMacros
708    = Args.hasArg(OPT_code_completion_macros);
709  Opts.CodeCompleteOpts.IncludeCodePatterns
710    = Args.hasArg(OPT_code_completion_patterns);
711  Opts.CodeCompleteOpts.IncludeGlobals
712    = !Args.hasArg(OPT_no_code_completion_globals);
713  Opts.CodeCompleteOpts.IncludeBriefComments
714    = Args.hasArg(OPT_code_completion_brief_comments);
715
716  Opts.OverrideRecordLayoutsFile
717    = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
718  if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
719                                     OPT_arcmt_modify,
720                                     OPT_arcmt_migrate)) {
721    switch (A->getOption().getID()) {
722    default:
723      llvm_unreachable("missed a case");
724    case OPT_arcmt_check:
725      Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
726      break;
727    case OPT_arcmt_modify:
728      Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
729      break;
730    case OPT_arcmt_migrate:
731      Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
732      break;
733    }
734  }
735  Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
736  Opts.ARCMTMigrateReportOut
737    = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
738  Opts.ARCMTMigrateEmitARCErrors
739    = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
740
741  if (Args.hasArg(OPT_objcmt_migrate_literals))
742    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
743  if (Args.hasArg(OPT_objcmt_migrate_subscripting))
744    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
745
746  if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
747      Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
748    Diags.Report(diag::err_drv_argument_not_allowed_with)
749      << "ARC migration" << "ObjC migration";
750  }
751
752  InputKind DashX = IK_None;
753  if (const Arg *A = Args.getLastArg(OPT_x)) {
754    DashX = llvm::StringSwitch<InputKind>(A->getValue())
755      .Case("c", IK_C)
756      .Case("cl", IK_OpenCL)
757      .Case("cuda", IK_CUDA)
758      .Case("c++", IK_CXX)
759      .Case("objective-c", IK_ObjC)
760      .Case("objective-c++", IK_ObjCXX)
761      .Case("cpp-output", IK_PreprocessedC)
762      .Case("assembler-with-cpp", IK_Asm)
763      .Case("c++-cpp-output", IK_PreprocessedCXX)
764      .Case("objective-c-cpp-output", IK_PreprocessedObjC)
765      .Case("objc-cpp-output", IK_PreprocessedObjC)
766      .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
767      .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
768      .Case("c-header", IK_C)
769      .Case("cl-header", IK_OpenCL)
770      .Case("objective-c-header", IK_ObjC)
771      .Case("c++-header", IK_CXX)
772      .Case("objective-c++-header", IK_ObjCXX)
773      .Case("ast", IK_AST)
774      .Case("ir", IK_LLVM_IR)
775      .Default(IK_None);
776    if (DashX == IK_None)
777      Diags.Report(diag::err_drv_invalid_value)
778        << A->getAsString(Args) << A->getValue();
779  }
780
781  // '-' is the default input if none is given.
782  std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
783  Opts.Inputs.clear();
784  if (Inputs.empty())
785    Inputs.push_back("-");
786  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
787    InputKind IK = DashX;
788    if (IK == IK_None) {
789      IK = FrontendOptions::getInputKindForExtension(
790        StringRef(Inputs[i]).rsplit('.').second);
791      // FIXME: Remove this hack.
792      if (i == 0)
793        DashX = IK;
794    }
795    Opts.Inputs.push_back(FrontendInputFile(Inputs[i], IK));
796  }
797
798  return DashX;
799}
800
801std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
802                                                 void *MainAddr) {
803  llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
804
805  if (!P.isEmpty()) {
806    P.eraseComponent();  // Remove /clang from foo/bin/clang
807    P.eraseComponent();  // Remove /bin   from foo/bin
808
809    // Get foo/lib/clang/<version>/include
810    P.appendComponent("lib");
811    P.appendComponent("clang");
812    P.appendComponent(CLANG_VERSION_STRING);
813  }
814
815  return P.str();
816}
817
818static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
819  using namespace options;
820  Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
821  Opts.Verbose = Args.hasArg(OPT_v);
822  Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
823  Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
824  Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
825  if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
826    Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
827  Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
828  Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodule_cache_path);
829  Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
830
831  // Add -I..., -F..., and -index-header-map options in order.
832  bool IsIndexHeaderMap = false;
833  for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F,
834                                             OPT_index_header_map),
835       ie = Args.filtered_end(); it != ie; ++it) {
836    if ((*it)->getOption().matches(OPT_index_header_map)) {
837      // -index-header-map applies to the next -I or -F.
838      IsIndexHeaderMap = true;
839      continue;
840    }
841
842    frontend::IncludeDirGroup Group
843      = IsIndexHeaderMap? frontend::IndexHeaderMap : frontend::Angled;
844
845    Opts.AddPath((*it)->getValue(), Group, true,
846                 /*IsFramework=*/ (*it)->getOption().matches(OPT_F), false);
847    IsIndexHeaderMap = false;
848  }
849
850  // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
851  StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
852  for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
853                                             OPT_iwithprefixbefore),
854         ie = Args.filtered_end(); it != ie; ++it) {
855    const Arg *A = *it;
856    if (A->getOption().matches(OPT_iprefix))
857      Prefix = A->getValue();
858    else if (A->getOption().matches(OPT_iwithprefix))
859      Opts.AddPath(Prefix.str() + A->getValue(),
860                   frontend::System, false, false, false);
861    else
862      Opts.AddPath(Prefix.str() + A->getValue(),
863                   frontend::Angled, false, false, false);
864  }
865
866  for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
867         ie = Args.filtered_end(); it != ie; ++it)
868    Opts.AddPath((*it)->getValue(), frontend::After, true, false, false);
869  for (arg_iterator it = Args.filtered_begin(OPT_iquote),
870         ie = Args.filtered_end(); it != ie; ++it)
871    Opts.AddPath((*it)->getValue(), frontend::Quoted, true, false, false);
872  for (arg_iterator it = Args.filtered_begin(OPT_isystem,
873         OPT_iwithsysroot), ie = Args.filtered_end(); it != ie; ++it)
874    Opts.AddPath((*it)->getValue(), frontend::System, true, false,
875                 !(*it)->getOption().matches(OPT_iwithsysroot));
876  for (arg_iterator it = Args.filtered_begin(OPT_iframework),
877         ie = Args.filtered_end(); it != ie; ++it)
878    Opts.AddPath((*it)->getValue(), frontend::System, true, true,
879                 true);
880
881  // Add the paths for the various language specific isystem flags.
882  for (arg_iterator it = Args.filtered_begin(OPT_c_isystem),
883       ie = Args.filtered_end(); it != ie; ++it)
884    Opts.AddPath((*it)->getValue(), frontend::CSystem, true, false, true);
885  for (arg_iterator it = Args.filtered_begin(OPT_cxx_isystem),
886       ie = Args.filtered_end(); it != ie; ++it)
887    Opts.AddPath((*it)->getValue(), frontend::CXXSystem, true, false, true);
888  for (arg_iterator it = Args.filtered_begin(OPT_objc_isystem),
889       ie = Args.filtered_end(); it != ie; ++it)
890    Opts.AddPath((*it)->getValue(), frontend::ObjCSystem, true, false,true);
891  for (arg_iterator it = Args.filtered_begin(OPT_objcxx_isystem),
892       ie = Args.filtered_end(); it != ie; ++it)
893    Opts.AddPath((*it)->getValue(), frontend::ObjCXXSystem, true, false,
894                 true);
895
896  // Add the internal paths from a driver that detects standard include paths.
897  for (arg_iterator I = Args.filtered_begin(OPT_internal_isystem,
898                                            OPT_internal_externc_isystem),
899                    E = Args.filtered_end();
900       I != E; ++I)
901    Opts.AddPath((*I)->getValue(), frontend::System,
902                 false, false, /*IgnoreSysRoot=*/true, /*IsInternal=*/true,
903                 (*I)->getOption().matches(OPT_internal_externc_isystem));
904
905  // Add the path prefixes which are implicitly treated as being system headers.
906  for (arg_iterator I = Args.filtered_begin(OPT_isystem_prefix,
907                                            OPT_ino_system_prefix),
908                    E = Args.filtered_end();
909       I != E; ++I)
910    Opts.AddSystemHeaderPrefix((*I)->getValue(),
911                               (*I)->getOption().matches(OPT_isystem_prefix));
912}
913
914void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
915                                         LangStandard::Kind LangStd) {
916  // Set some properties which depend solely on the input kind; it would be nice
917  // to move these to the language standard, and have the driver resolve the
918  // input kind + language standard.
919  if (IK == IK_Asm) {
920    Opts.AsmPreprocessor = 1;
921  } else if (IK == IK_ObjC ||
922             IK == IK_ObjCXX ||
923             IK == IK_PreprocessedObjC ||
924             IK == IK_PreprocessedObjCXX) {
925    Opts.ObjC1 = Opts.ObjC2 = 1;
926  }
927
928  if (LangStd == LangStandard::lang_unspecified) {
929    // Based on the base language, pick one.
930    switch (IK) {
931    case IK_None:
932    case IK_AST:
933    case IK_LLVM_IR:
934      llvm_unreachable("Invalid input kind!");
935    case IK_OpenCL:
936      LangStd = LangStandard::lang_opencl;
937      break;
938    case IK_CUDA:
939      LangStd = LangStandard::lang_cuda;
940      break;
941    case IK_Asm:
942    case IK_C:
943    case IK_PreprocessedC:
944    case IK_ObjC:
945    case IK_PreprocessedObjC:
946      LangStd = LangStandard::lang_gnu99;
947      break;
948    case IK_CXX:
949    case IK_PreprocessedCXX:
950    case IK_ObjCXX:
951    case IK_PreprocessedObjCXX:
952      LangStd = LangStandard::lang_gnucxx98;
953      break;
954    }
955  }
956
957  const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
958  Opts.LineComment = Std.hasLineComments();
959  Opts.C99 = Std.isC99();
960  Opts.C11 = Std.isC11();
961  Opts.CPlusPlus = Std.isCPlusPlus();
962  Opts.CPlusPlus0x = Std.isCPlusPlus0x();
963  Opts.CPlusPlus1y = Std.isCPlusPlus1y();
964  Opts.Digraphs = Std.hasDigraphs();
965  Opts.GNUMode = Std.isGNUMode();
966  Opts.GNUInline = !Std.isC99();
967  Opts.HexFloats = Std.hasHexFloats();
968  Opts.ImplicitInt = Std.hasImplicitInt();
969
970  // Set OpenCL Version.
971  if (LangStd == LangStandard::lang_opencl) {
972    Opts.OpenCL = 1;
973    Opts.OpenCLVersion = 100;
974  }
975  else if (LangStd == LangStandard::lang_opencl11) {
976      Opts.OpenCL = 1;
977      Opts.OpenCLVersion = 110;
978  }
979  else if (LangStd == LangStandard::lang_opencl12) {
980    Opts.OpenCL = 1;
981    Opts.OpenCLVersion = 120;
982  }
983
984  // OpenCL has some additional defaults.
985  if (Opts.OpenCL) {
986    Opts.AltiVec = 0;
987    Opts.CXXOperatorNames = 1;
988    Opts.LaxVectorConversions = 0;
989    Opts.DefaultFPContract = 1;
990  }
991
992  if (LangStd == LangStandard::lang_cuda)
993    Opts.CUDA = 1;
994
995  // OpenCL and C++ both have bool, true, false keywords.
996  Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
997
998  // C++ has wchar_t keyword.
999  Opts.WChar = Opts.CPlusPlus;
1000
1001  Opts.GNUKeywords = Opts.GNUMode;
1002  Opts.CXXOperatorNames = Opts.CPlusPlus;
1003
1004  // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1005  // is specified, or -std is set to a conforming mode.
1006  Opts.Trigraphs = !Opts.GNUMode;
1007
1008  Opts.DollarIdents = !Opts.AsmPreprocessor;
1009}
1010
1011static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1012                          DiagnosticsEngine &Diags) {
1013  // FIXME: Cleanup per-file based stuff.
1014  LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1015  if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1016    LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1017#define LANGSTANDARD(id, name, desc, features) \
1018      .Case(name, LangStandard::lang_##id)
1019#include "clang/Frontend/LangStandards.def"
1020      .Default(LangStandard::lang_unspecified);
1021    if (LangStd == LangStandard::lang_unspecified)
1022      Diags.Report(diag::err_drv_invalid_value)
1023        << A->getAsString(Args) << A->getValue();
1024    else {
1025      // Valid standard, check to make sure language and standard are compatable.
1026      const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1027      switch (IK) {
1028      case IK_C:
1029      case IK_ObjC:
1030      case IK_PreprocessedC:
1031      case IK_PreprocessedObjC:
1032        if (!(Std.isC89() || Std.isC99()))
1033          Diags.Report(diag::err_drv_argument_not_allowed_with)
1034            << A->getAsString(Args) << "C/ObjC";
1035        break;
1036      case IK_CXX:
1037      case IK_ObjCXX:
1038      case IK_PreprocessedCXX:
1039      case IK_PreprocessedObjCXX:
1040        if (!Std.isCPlusPlus())
1041          Diags.Report(diag::err_drv_argument_not_allowed_with)
1042            << A->getAsString(Args) << "C++/ObjC++";
1043        break;
1044      case IK_OpenCL:
1045        if (!Std.isC99())
1046          Diags.Report(diag::err_drv_argument_not_allowed_with)
1047            << A->getAsString(Args) << "OpenCL";
1048        break;
1049      case IK_CUDA:
1050        if (!Std.isCPlusPlus())
1051          Diags.Report(diag::err_drv_argument_not_allowed_with)
1052            << A->getAsString(Args) << "CUDA";
1053        break;
1054      default:
1055        break;
1056      }
1057    }
1058  }
1059
1060  // -cl-std only applies for OpenCL language standards.
1061  // Override the -std option in this case.
1062  if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1063    LangStandard::Kind OpenCLLangStd
1064    = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1065    .Case("CL", LangStandard::lang_opencl)
1066    .Case("CL1.1", LangStandard::lang_opencl11)
1067    .Case("CL1.2", LangStandard::lang_opencl12)
1068    .Default(LangStandard::lang_unspecified);
1069
1070    if (OpenCLLangStd == LangStandard::lang_unspecified) {
1071      Diags.Report(diag::err_drv_invalid_value)
1072      << A->getAsString(Args) << A->getValue();
1073    }
1074    else
1075      LangStd = OpenCLLangStd;
1076  }
1077
1078  CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1079
1080  // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1081  // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1082  // while a subset (the non-C++ GNU keywords) is provided by GCC's
1083  // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1084  // name, as it doesn't seem a useful distinction.
1085  Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1086                                  Opts.GNUKeywords);
1087
1088  if (Args.hasArg(OPT_fno_operator_names))
1089    Opts.CXXOperatorNames = 0;
1090
1091  if (Opts.ObjC1) {
1092    if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1093      StringRef value = arg->getValue();
1094      if (Opts.ObjCRuntime.tryParse(value))
1095        Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1096    }
1097
1098    if (Args.hasArg(OPT_fobjc_gc_only))
1099      Opts.setGC(LangOptions::GCOnly);
1100    else if (Args.hasArg(OPT_fobjc_gc))
1101      Opts.setGC(LangOptions::HybridGC);
1102    else if (Args.hasArg(OPT_fobjc_arc)) {
1103      Opts.ObjCAutoRefCount = 1;
1104      if (!Opts.ObjCRuntime.allowsARC())
1105        Diags.Report(diag::err_arc_unsupported_on_runtime);
1106
1107      // Only set ObjCARCWeak if ARC is enabled.
1108      if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1109        Opts.ObjCARCWeak = 1;
1110      else
1111        Opts.ObjCARCWeak = Opts.ObjCRuntime.allowsWeak();
1112    }
1113
1114    if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1115      Opts.ObjCInferRelatedResultType = 0;
1116  }
1117
1118  if (Args.hasArg(OPT_fgnu89_inline))
1119    Opts.GNUInline = 1;
1120
1121  if (Args.hasArg(OPT_fapple_kext)) {
1122    if (!Opts.CPlusPlus)
1123      Diags.Report(diag::warn_c_kext);
1124    else
1125      Opts.AppleKext = 1;
1126  }
1127
1128  if (Args.hasArg(OPT_print_ivar_layout))
1129    Opts.ObjCGCBitmapPrint = 1;
1130  if (Args.hasArg(OPT_fno_constant_cfstrings))
1131    Opts.NoConstantCFStrings = 1;
1132
1133  if (Args.hasArg(OPT_faltivec))
1134    Opts.AltiVec = 1;
1135
1136  if (Args.hasArg(OPT_pthread))
1137    Opts.POSIXThreads = 1;
1138
1139  if (Args.hasArg(OPT_fdelayed_template_parsing))
1140    Opts.DelayedTemplateParsing = 1;
1141
1142  StringRef Vis = Args.getLastArgValue(OPT_fvisibility, "default");
1143  if (Vis == "default")
1144    Opts.setVisibilityMode(DefaultVisibility);
1145  else if (Vis == "hidden")
1146    Opts.setVisibilityMode(HiddenVisibility);
1147  else if (Vis == "protected")
1148    // FIXME: diagnose if target does not support protected visibility
1149    Opts.setVisibilityMode(ProtectedVisibility);
1150  else
1151    Diags.Report(diag::err_drv_invalid_value)
1152      << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1153
1154  if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1155    Opts.InlineVisibilityHidden = 1;
1156
1157  if (Args.hasArg(OPT_ftrapv)) {
1158    Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1159    // Set the handler, if one is specified.
1160    Opts.OverflowHandler =
1161        Args.getLastArgValue(OPT_ftrapv_handler);
1162  }
1163  else if (Args.hasArg(OPT_fwrapv))
1164    Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1165
1166  if (Args.hasArg(OPT_trigraphs))
1167    Opts.Trigraphs = 1;
1168
1169  Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1170                                   OPT_fno_dollars_in_identifiers,
1171                                   Opts.DollarIdents);
1172  Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1173  Opts.MicrosoftExt
1174    = Args.hasArg(OPT_fms_extensions) || Args.hasArg(OPT_fms_compatibility);
1175  Opts.MicrosoftMode = Args.hasArg(OPT_fms_compatibility);
1176  Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
1177  Opts.MSCVersion = Args.getLastArgIntValue(OPT_fmsc_version, 0, Diags);
1178  Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1179  Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1180  Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
1181                                   Opts.ConstStrings);
1182  if (Args.hasArg(OPT_fno_lax_vector_conversions))
1183    Opts.LaxVectorConversions = 0;
1184  if (Args.hasArg(OPT_fno_threadsafe_statics))
1185    Opts.ThreadsafeStatics = 0;
1186  Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1187  Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
1188  Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
1189  Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1190  Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
1191
1192  Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1193  Opts.Blocks = Args.hasArg(OPT_fblocks);
1194  Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
1195  Opts.Modules = Args.hasArg(OPT_fmodules);
1196  Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1197  Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
1198  Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1199  Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1200  Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1201  Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1202  Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1203  Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1204  Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1205  Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1206  Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1207  Opts.InstantiationDepth = Args.getLastArgIntValue(OPT_ftemplate_depth, 512,
1208                                                    Diags);
1209  Opts.ConstexprCallDepth = Args.getLastArgIntValue(OPT_fconstexpr_depth, 512,
1210                                                    Diags);
1211  Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
1212  Opts.NumLargeByValueCopy = Args.getLastArgIntValue(OPT_Wlarge_by_value_copy_EQ,
1213                                                    0, Diags);
1214  Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
1215  Opts.ObjCConstantStringClass =
1216    Args.getLastArgValue(OPT_fconstant_string_class);
1217  Opts.ObjCDefaultSynthProperties =
1218    Args.hasArg(OPT_fobjc_default_synthesize_properties);
1219  Opts.EncodeExtendedBlockSig =
1220    Args.hasArg(OPT_fencode_extended_block_signature);
1221  Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1222  Opts.PackStruct = Args.getLastArgIntValue(OPT_fpack_struct_EQ, 0, Diags);
1223  Opts.PICLevel = Args.getLastArgIntValue(OPT_pic_level, 0, Diags);
1224  Opts.PIELevel = Args.getLastArgIntValue(OPT_pie_level, 0, Diags);
1225  Opts.Static = Args.hasArg(OPT_static_define);
1226  Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
1227  Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
1228                        || Args.hasArg(OPT_fdump_record_layouts);
1229  Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1230  Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1231  Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1232  Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
1233  Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
1234  Opts.MRTD = Args.hasArg(OPT_mrtd);
1235  Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
1236  Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
1237  Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
1238  Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
1239  Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
1240  Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
1241  Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
1242  Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
1243
1244  // Record whether the __DEPRECATED define was requested.
1245  Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
1246                                 OPT_fno_deprecated_macro,
1247                                 Opts.Deprecated);
1248
1249  // FIXME: Eliminate this dependency.
1250  unsigned Opt = getOptimizationLevel(Args, IK, Diags),
1251       OptSize = getOptimizationLevelSize(Args, IK, Diags);
1252  Opts.Optimize = Opt != 0;
1253  Opts.OptimizeSize = OptSize != 0;
1254
1255  // This is the __NO_INLINE__ define, which just depends on things like the
1256  // optimization level and -fno-inline, not actually whether the backend has
1257  // inlining enabled.
1258  Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
1259
1260  Opts.FastMath = Args.hasArg(OPT_ffast_math);
1261  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only);
1262
1263  Opts.EmitMicrosoftInlineAsm = Args.hasArg(OPT_fenable_experimental_ms_inline_asm);
1264
1265  Opts.RetainCommentsFromSystemHeaders =
1266      Args.hasArg(OPT_fretain_comments_from_system_headers);
1267
1268  unsigned SSP = Args.getLastArgIntValue(OPT_stack_protector, 0, Diags);
1269  switch (SSP) {
1270  default:
1271    Diags.Report(diag::err_drv_invalid_value)
1272      << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1273    break;
1274  case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
1275  case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
1276  case 2: Opts.setStackProtector(LangOptions::SSPReq); break;
1277  }
1278
1279  // Parse -fsanitize= arguments.
1280  std::vector<std::string> Sanitizers = Args.getAllArgValues(OPT_fsanitize_EQ);
1281  for (unsigned I = 0, N = Sanitizers.size(); I != N; ++I) {
1282    // Since the Opts.Sanitize* values are bitfields, it's a little tricky to
1283    // efficiently map string values to them. Perform the mapping indirectly:
1284    // convert strings to enumerated values, then switch over the enum to set
1285    // the right bitfield value.
1286    enum Sanitizer {
1287#define SANITIZER(NAME, ID) \
1288      ID,
1289#include "clang/Basic/Sanitizers.def"
1290      Unknown
1291    };
1292    switch (llvm::StringSwitch<unsigned>(Sanitizers[I])
1293#define SANITIZER(NAME, ID) \
1294              .Case(NAME, ID)
1295#include "clang/Basic/Sanitizers.def"
1296              .Default(Unknown)) {
1297#define SANITIZER(NAME, ID) \
1298    case ID: \
1299      Opts.Sanitize##ID = true; \
1300      break;
1301#include "clang/Basic/Sanitizers.def"
1302
1303    case Unknown:
1304      Diags.Report(diag::err_drv_invalid_value)
1305        << "-fsanitize=" << Sanitizers[I];
1306      break;
1307    }
1308  }
1309}
1310
1311static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1312                                  FileManager &FileMgr,
1313                                  DiagnosticsEngine &Diags) {
1314  using namespace options;
1315  Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1316  Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1317  if (const Arg *A = Args.getLastArg(OPT_token_cache))
1318      Opts.TokenCache = A->getValue();
1319  else
1320    Opts.TokenCache = Opts.ImplicitPTHInclude;
1321  Opts.UsePredefines = !Args.hasArg(OPT_undef);
1322  Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1323  Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1324
1325  Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
1326  for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
1327         ie = Args.filtered_end(); it != ie; ++it) {
1328    const Arg *A = *it;
1329    Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
1330  }
1331
1332  if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1333    StringRef Value(A->getValue());
1334    size_t Comma = Value.find(',');
1335    unsigned Bytes = 0;
1336    unsigned EndOfLine = 0;
1337
1338    if (Comma == StringRef::npos ||
1339        Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1340        Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1341      Diags.Report(diag::err_drv_preamble_format);
1342    else {
1343      Opts.PrecompiledPreambleBytes.first = Bytes;
1344      Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1345    }
1346  }
1347
1348  // Add macros from the command line.
1349  for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1350         ie = Args.filtered_end(); it != ie; ++it) {
1351    if ((*it)->getOption().matches(OPT_D))
1352      Opts.addMacroDef((*it)->getValue());
1353    else
1354      Opts.addMacroUndef((*it)->getValue());
1355  }
1356
1357  Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1358
1359  // Add the ordered list of -includes.
1360  for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1361                                             OPT_include_pth),
1362         ie = Args.filtered_end(); it != ie; ++it) {
1363    const Arg *A = *it;
1364    Opts.Includes.push_back(A->getValue());
1365  }
1366
1367  for (arg_iterator it = Args.filtered_begin(OPT_chain_include),
1368         ie = Args.filtered_end(); it != ie; ++it) {
1369    const Arg *A = *it;
1370    Opts.ChainedIncludes.push_back(A->getValue());
1371  }
1372
1373  // Include 'altivec.h' if -faltivec option present
1374  if (Args.hasArg(OPT_faltivec))
1375    Opts.Includes.push_back("altivec.h");
1376
1377  for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1378         ie = Args.filtered_end(); it != ie; ++it) {
1379    const Arg *A = *it;
1380    std::pair<StringRef,StringRef> Split =
1381      StringRef(A->getValue()).split(';');
1382
1383    if (Split.second.empty()) {
1384      Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1385      continue;
1386    }
1387
1388    Opts.addRemappedFile(Split.first, Split.second);
1389  }
1390
1391  if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
1392    StringRef Name = A->getValue();
1393    unsigned Library = llvm::StringSwitch<unsigned>(Name)
1394      .Case("libc++", ARCXX_libcxx)
1395      .Case("libstdc++", ARCXX_libstdcxx)
1396      .Case("none", ARCXX_nolib)
1397      .Default(~0U);
1398    if (Library == ~0U)
1399      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1400    else
1401      Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
1402  }
1403}
1404
1405static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1406                                        ArgList &Args) {
1407  using namespace options;
1408  Opts.ShowCPP = !Args.hasArg(OPT_dM);
1409  Opts.ShowComments = Args.hasArg(OPT_C);
1410  Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1411  Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1412  Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1413  Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
1414}
1415
1416static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1417  using namespace options;
1418  Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1419  Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
1420  Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1421  Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
1422  Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1423  Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1424
1425  // Use the default target triple if unspecified.
1426  if (Opts.Triple.empty())
1427    Opts.Triple = llvm::sys::getDefaultTargetTriple();
1428}
1429
1430//
1431
1432bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1433                                        const char *const *ArgBegin,
1434                                        const char *const *ArgEnd,
1435                                        DiagnosticsEngine &Diags) {
1436  bool Success = true;
1437
1438  // Parse the arguments.
1439  OwningPtr<OptTable> Opts(createDriverOptTable());
1440  unsigned MissingArgIndex, MissingArgCount;
1441  OwningPtr<InputArgList> Args(
1442    Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1443
1444  // Check for missing argument error.
1445  if (MissingArgCount) {
1446    Diags.Report(diag::err_drv_missing_argument)
1447      << Args->getArgString(MissingArgIndex) << MissingArgCount;
1448    Success = false;
1449  }
1450
1451  // Issue errors on unknown arguments.
1452  for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1453         ie = Args->filtered_end(); it != ie; ++it) {
1454    Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
1455    Success = false;
1456  }
1457
1458  // Issue errors on arguments that are not valid for CC1.
1459  for (ArgList::iterator I = Args->begin(), E = Args->end();
1460       I != E; ++I) {
1461    if (!(*I)->getOption().hasFlag(options::CC1Option)) {
1462      Diags.Report(diag::err_drv_unknown_argument) << (*I)->getAsString(*Args);
1463      Success = false;
1464    }
1465  }
1466
1467  Success = ParseAnalyzerArgs(*Res.getAnalyzerOpts(), *Args, Diags) && Success;
1468  Success = ParseMigratorArgs(Res.getMigratorOpts(), *Args) && Success;
1469  ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1470  Success = ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, &Diags)
1471            && Success;
1472  ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
1473  // FIXME: We shouldn't have to pass the DashX option around here
1474  InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1475  Success = ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags)
1476            && Success;
1477  ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1478  if (DashX != IK_AST && DashX != IK_LLVM_IR) {
1479    ParseLangArgs(*Res.getLangOpts(), *Args, DashX, Diags);
1480    if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
1481      Res.getLangOpts()->ObjCExceptions = 1;
1482  }
1483  // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
1484  // PCH file and find the original header name. Remove the need to do that in
1485  // ParsePreprocessorArgs and remove the FileManager
1486  // parameters from the function and the "FileManager.h" #include.
1487  FileManager FileMgr(Res.getFileSystemOpts());
1488  ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
1489  ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
1490  ParseTargetArgs(Res.getTargetOpts(), *Args);
1491
1492  return Success;
1493}
1494
1495namespace {
1496
1497  class ModuleSignature {
1498    llvm::SmallVector<uint64_t, 16> Data;
1499    unsigned CurBit;
1500    uint64_t CurValue;
1501
1502  public:
1503    ModuleSignature() : CurBit(0), CurValue(0) { }
1504
1505    void add(uint64_t Value, unsigned Bits);
1506    void add(StringRef Value);
1507    void flush();
1508
1509    llvm::APInt getAsInteger() const;
1510  };
1511}
1512
1513void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
1514  CurValue |= Value << CurBit;
1515  if (CurBit + NumBits < 64) {
1516    CurBit += NumBits;
1517    return;
1518  }
1519
1520  // Add the current word.
1521  Data.push_back(CurValue);
1522
1523  if (CurBit)
1524    CurValue = Value >> (64-CurBit);
1525  else
1526    CurValue = 0;
1527  CurBit = (CurBit+NumBits) & 63;
1528}
1529
1530void ModuleSignature::flush() {
1531  if (CurBit == 0)
1532    return;
1533
1534  Data.push_back(CurValue);
1535  CurBit = 0;
1536  CurValue = 0;
1537}
1538
1539void ModuleSignature::add(StringRef Value) {
1540  for (StringRef::iterator I = Value.begin(), IEnd = Value.end(); I != IEnd;++I)
1541    add(*I, 8);
1542}
1543
1544llvm::APInt ModuleSignature::getAsInteger() const {
1545  return llvm::APInt(Data.size() * 64, Data);
1546}
1547
1548std::string CompilerInvocation::getModuleHash() const {
1549  using llvm::hash_code;
1550  using llvm::hash_value;
1551  using llvm::hash_combine;
1552
1553  // Start the signature with the compiler version.
1554  // FIXME: We'd rather use something more cryptographically sound than
1555  // CityHash, but this will do for now.
1556  hash_code code = hash_value(getClangFullRepositoryVersion());
1557
1558  // Extend the signature with the language options
1559#define LANGOPT(Name, Bits, Default, Description) \
1560   code = hash_combine(code, LangOpts->Name);
1561#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
1562  code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
1563#define BENIGN_LANGOPT(Name, Bits, Default, Description)
1564#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
1565#include "clang/Basic/LangOptions.def"
1566
1567  // Extend the signature with the target options.
1568  code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
1569                      TargetOpts->ABI, TargetOpts->CXXABI,
1570                      TargetOpts->LinkerVersion);
1571  for (unsigned i = 0, n = TargetOpts->FeaturesAsWritten.size(); i != n; ++i)
1572    code = hash_combine(code, TargetOpts->FeaturesAsWritten[i]);
1573
1574  // Extend the signature with preprocessor options.
1575  const PreprocessorOptions &ppOpts = getPreprocessorOpts();
1576  code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
1577
1578  std::vector<StringRef> MacroDefs;
1579  for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
1580            I = getPreprocessorOpts().Macros.begin(),
1581         IEnd = getPreprocessorOpts().Macros.end();
1582       I != IEnd; ++I) {
1583    code = hash_combine(code, I->first, I->second);
1584  }
1585
1586  // Extend the signature with the sysroot.
1587  const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
1588  code = hash_combine(code, hsOpts.Sysroot, hsOpts.UseBuiltinIncludes,
1589                      hsOpts.UseStandardSystemIncludes,
1590                      hsOpts.UseStandardCXXIncludes,
1591                      hsOpts.UseLibcxx);
1592
1593  return llvm::APInt(64, code).toString(36, /*Signed=*/false);
1594}
1595