CompilerInvocation.cpp revision 251662 
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"
32#include "llvm/Support/system_error.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    if (A->getOption().matches(options::OPT_Ofast))
73      return 3;
74
75    assert (A->getOption().matches(options::OPT_O));
76
77    StringRef S(A->getValue());
78    if (S == "s" || S == "z" || S.empty())
79      return 2;
80
81    return Args.getLastArgIntValue(OPT_O, DefaultOpt, Diags);
82  }
83
84  return DefaultOpt;
85}
86
87static unsigned getOptimizationLevelSize(ArgList &Args) {
88  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
89    if (A->getOption().matches(options::OPT_O)) {
90      switch (A->getValue()[0]) {
91      default:
92        return 0;
93      case 's':
94        return 1;
95      case 'z':
96        return 2;
97      }
98    }
99  }
100  return 0;
101}
102
103static void addWarningArgs(ArgList &Args, std::vector<std::string> &Warnings) {
104  for (arg_iterator I = Args.filtered_begin(OPT_W_Group),
105         E = Args.filtered_end(); I != E; ++I) {
106    Arg *A = *I;
107    // If the argument is a pure flag, add its name (minus the "W" at the beginning)
108    // to the warning list. Else, add its value (for the OPT_W case).
109    if (A->getOption().getKind() == Option::FlagClass) {
110      Warnings.push_back(A->getOption().getName().substr(1));
111    } else {
112      for (unsigned Idx = 0, End = A->getNumValues();
113           Idx < End; ++Idx) {
114        StringRef V = A->getValue(Idx);
115        // "-Wl," and such are not warning options.
116        // FIXME: Should be handled by putting these in separate flags.
117        if (V.startswith("l,") || V.startswith("a,") || V.startswith("p,"))
118          continue;
119
120        Warnings.push_back(V);
121      }
122    }
123  }
124}
125
126static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
127                              DiagnosticsEngine &Diags) {
128  using namespace options;
129  bool Success = true;
130  if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
131    StringRef Name = A->getValue();
132    AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
133#define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
134      .Case(CMDFLAG, NAME##Model)
135#include "clang/StaticAnalyzer/Core/Analyses.def"
136      .Default(NumStores);
137    if (Value == NumStores) {
138      Diags.Report(diag::err_drv_invalid_value)
139        << A->getAsString(Args) << Name;
140      Success = false;
141    } else {
142      Opts.AnalysisStoreOpt = Value;
143    }
144  }
145
146  if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
147    StringRef Name = A->getValue();
148    AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
149#define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
150      .Case(CMDFLAG, NAME##Model)
151#include "clang/StaticAnalyzer/Core/Analyses.def"
152      .Default(NumConstraints);
153    if (Value == NumConstraints) {
154      Diags.Report(diag::err_drv_invalid_value)
155        << A->getAsString(Args) << Name;
156      Success = false;
157    } else {
158      Opts.AnalysisConstraintsOpt = Value;
159    }
160  }
161
162  if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
163    StringRef Name = A->getValue();
164    AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
165#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
166      .Case(CMDFLAG, PD_##NAME)
167#include "clang/StaticAnalyzer/Core/Analyses.def"
168      .Default(NUM_ANALYSIS_DIAG_CLIENTS);
169    if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
170      Diags.Report(diag::err_drv_invalid_value)
171        << A->getAsString(Args) << Name;
172      Success = false;
173    } else {
174      Opts.AnalysisDiagOpt = Value;
175    }
176  }
177
178  if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
179    StringRef Name = A->getValue();
180    AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
181#define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
182      .Case(CMDFLAG, NAME)
183#include "clang/StaticAnalyzer/Core/Analyses.def"
184      .Default(NumPurgeModes);
185    if (Value == NumPurgeModes) {
186      Diags.Report(diag::err_drv_invalid_value)
187        << A->getAsString(Args) << Name;
188      Success = false;
189    } else {
190      Opts.AnalysisPurgeOpt = Value;
191    }
192  }
193
194  if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
195    StringRef Name = A->getValue();
196    AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
197#define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
198      .Case(CMDFLAG, NAME)
199#include "clang/StaticAnalyzer/Core/Analyses.def"
200      .Default(NumInliningModes);
201    if (Value == NumInliningModes) {
202      Diags.Report(diag::err_drv_invalid_value)
203        << A->getAsString(Args) << Name;
204      Success = false;
205    } else {
206      Opts.InliningMode = Value;
207    }
208  }
209
210  Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
211  Opts.visualizeExplodedGraphWithGraphViz =
212    Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
213  Opts.visualizeExplodedGraphWithUbiGraph =
214    Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
215  Opts.NoRetryExhausted = Args.hasArg(OPT_analyzer_disable_retry_exhausted);
216  Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
217  Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
218  Opts.AnalyzeNestedBlocks =
219    Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
220  Opts.eagerlyAssumeBinOpBifurcation = Args.hasArg(OPT_analyzer_eagerly_assume);
221  Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
222  Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
223  Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
224  Opts.maxBlockVisitOnPath = Args.getLastArgIntValue(OPT_analyzer_max_loop, 4, Diags);
225  Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
226  Opts.InlineMaxStackDepth =
227    Args.getLastArgIntValue(OPT_analyzer_inline_max_stack_depth,
228                            Opts.InlineMaxStackDepth, Diags);
229
230  Opts.CheckersControlList.clear();
231  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_checker,
232                                             OPT_analyzer_disable_checker),
233         ie = Args.filtered_end(); it != ie; ++it) {
234    const Arg *A = *it;
235    A->claim();
236    bool enable = (A->getOption().getID() == OPT_analyzer_checker);
237    // We can have a list of comma separated checker names, e.g:
238    // '-analyzer-checker=cocoa,unix'
239    StringRef checkerList = A->getValue();
240    SmallVector<StringRef, 4> checkers;
241    checkerList.split(checkers, ",");
242    for (unsigned i = 0, e = checkers.size(); i != e; ++i)
243      Opts.CheckersControlList.push_back(std::make_pair(checkers[i], enable));
244  }
245
246  // Go through the analyzer configuration options.
247  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_config),
248       ie = Args.filtered_end(); it != ie; ++it) {
249    const Arg *A = *it;
250    A->claim();
251    // We can have a list of comma separated config names, e.g:
252    // '-analyzer-config key1=val1,key2=val2'
253    StringRef configList = A->getValue();
254    SmallVector<StringRef, 4> configVals;
255    configList.split(configVals, ",");
256    for (unsigned i = 0, e = configVals.size(); i != e; ++i) {
257      StringRef key, val;
258      llvm::tie(key, val) = configVals[i].split("=");
259      if (val.empty()) {
260        Diags.Report(SourceLocation(),
261                     diag::err_analyzer_config_no_value) << configVals[i];
262        Success = false;
263        break;
264      }
265      if (val.find('=') != StringRef::npos) {
266        Diags.Report(SourceLocation(),
267                     diag::err_analyzer_config_multiple_values)
268          << configVals[i];
269        Success = false;
270        break;
271      }
272      Opts.Config[key] = val;
273    }
274  }
275
276  return Success;
277}
278
279static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
280  Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
281  Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
282  return true;
283}
284
285static void ParseCommentArgs(CommentOptions &Opts, ArgList &Args) {
286  Opts.BlockCommandNames = Args.getAllArgValues(OPT_fcomment_block_commands);
287  Opts.ParseAllComments = Args.hasArg(OPT_fparse_all_comments);
288}
289
290static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
291                             DiagnosticsEngine &Diags) {
292  using namespace options;
293  bool Success = true;
294
295  unsigned OptLevel = getOptimizationLevel(Args, IK, Diags);
296  if (OptLevel > 3) {
297    Diags.Report(diag::err_drv_invalid_value)
298      << Args.getLastArg(OPT_O)->getAsString(Args) << OptLevel;
299    OptLevel = 3;
300    Success = false;
301  }
302  Opts.OptimizationLevel = OptLevel;
303
304  // We must always run at least the always inlining pass.
305  Opts.setInlining(
306    (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
307                                 : CodeGenOptions::OnlyAlwaysInlining);
308  // -fno-inline-functions overrides OptimizationLevel > 1.
309  Opts.NoInline = Args.hasArg(OPT_fno_inline);
310  Opts.setInlining(Args.hasArg(OPT_fno_inline_functions) ?
311                     CodeGenOptions::OnlyAlwaysInlining : Opts.getInlining());
312
313  if (Args.hasArg(OPT_gline_tables_only)) {
314    Opts.setDebugInfo(CodeGenOptions::DebugLineTablesOnly);
315  } else if (Args.hasArg(OPT_g_Flag)) {
316    if (Args.hasFlag(OPT_flimit_debug_info, OPT_fno_limit_debug_info, true))
317      Opts.setDebugInfo(CodeGenOptions::LimitedDebugInfo);
318    else
319      Opts.setDebugInfo(CodeGenOptions::FullDebugInfo);
320  }
321  Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
322  Opts.SplitDwarfFile = Args.getLastArgValue(OPT_split_dwarf_file);
323
324  Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
325  Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
326  Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
327  Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
328    OPT_fuse_register_sized_bitfield_access);
329  Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
330  Opts.StructPathTBAA = Args.hasArg(OPT_struct_path_tbaa);
331  Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
332  Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
333  Opts.NoCommon = Args.hasArg(OPT_fno_common);
334  Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
335  Opts.OptimizeSize = getOptimizationLevelSize(Args);
336  Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
337                            Args.hasArg(OPT_ffreestanding));
338  Opts.UnrollLoops = Args.hasArg(OPT_funroll_loops) ||
339                     (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
340
341  Opts.Autolink = !Args.hasArg(OPT_fno_autolink);
342  Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
343  Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
344  Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);
345  Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
346  Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
347  Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
348  Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
349  Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
350  Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
351  Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
352  Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
353  Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
354  Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
355  Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
356                       Args.hasArg(OPT_cl_finite_math_only)||
357                       Args.hasArg(OPT_cl_fast_relaxed_math));
358  Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
359                       Args.hasArg(OPT_cl_finite_math_only)||
360                       Args.hasArg(OPT_cl_fast_relaxed_math));
361  Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
362  Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
363  Opts.NumRegisterParameters = Args.getLastArgIntValue(OPT_mregparm, 0, Diags);
364  Opts.NoGlobalMerge = Args.hasArg(OPT_mno_global_merge);
365  Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
366  Opts.EnableSegmentedStacks = Args.hasArg(OPT_split_stacks);
367  Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
368  Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
369  Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
370  Opts.NoDwarf2CFIAsm = Args.hasArg(OPT_fno_dwarf2_cfi_asm);
371  Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
372  Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
373  Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
374  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
375                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
376                      Args.hasArg(OPT_cl_fast_relaxed_math);
377  Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
378  Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
379  Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
380  Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
381
382  Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
383  Opts.DataSections = Args.hasArg(OPT_fdata_sections);
384
385  Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
386  Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
387  Opts.SanitizeRecover = !Args.hasArg(OPT_fno_sanitize_recover);
388
389  Opts.DisableGCov = Args.hasArg(OPT_test_coverage);
390  Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
391  Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
392  if (Opts.EmitGcovArcs || Opts.EmitGcovNotes) {
393  Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
394    Opts.CoverageExtraChecksum = Args.hasArg(OPT_coverage_cfg_checksum);
395    Opts.CoverageNoFunctionNamesInData =
396        Args.hasArg(OPT_coverage_no_function_names_in_data);
397    if (Args.hasArg(OPT_coverage_version_EQ)) {
398      StringRef CoverageVersion = Args.getLastArgValue(OPT_coverage_version_EQ);
399      if (CoverageVersion.size() != 4) {
400        Diags.Report(diag::err_drv_invalid_value)
401            << Args.getLastArg(OPT_coverage_version_EQ)->getAsString(Args)
402            << CoverageVersion;
403      } else {
404        memcpy(Opts.CoverageVersion, CoverageVersion.data(), 4);
405      }
406    }
407  }
408
409  Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
410  Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
411  Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
412  Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
413  Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
414  Opts.SanitizerBlacklistFile = Args.getLastArgValue(OPT_fsanitize_blacklist);
415  Opts.SanitizeMemoryTrackOrigins =
416    Args.hasArg(OPT_fsanitize_memory_track_origins);
417  Opts.SanitizeAddressZeroBaseShadow =
418    Args.hasArg(OPT_fsanitize_address_zero_base_shadow);
419  Opts.SanitizeUndefinedTrapOnError =
420    Args.hasArg(OPT_fsanitize_undefined_trap_on_error);
421  Opts.SSPBufferSize =
422    Args.getLastArgIntValue(OPT_stack_protector_buffer_size, 8, Diags);
423  Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
424  if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
425    StringRef Val = A->getValue();
426    unsigned StackAlignment = Opts.StackAlignment;
427    Val.getAsInteger(10, StackAlignment);
428    Opts.StackAlignment = StackAlignment;
429  }
430
431  if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
432    StringRef Name = A->getValue();
433    unsigned Method = llvm::StringSwitch<unsigned>(Name)
434      .Case("legacy", CodeGenOptions::Legacy)
435      .Case("non-legacy", CodeGenOptions::NonLegacy)
436      .Case("mixed", CodeGenOptions::Mixed)
437      .Default(~0U);
438    if (Method == ~0U) {
439      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
440      Success = false;
441    } else {
442      Opts.setObjCDispatchMethod(
443        static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
444    }
445  }
446
447  if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
448    StringRef Name = A->getValue();
449    unsigned Model = llvm::StringSwitch<unsigned>(Name)
450        .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
451        .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
452        .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
453        .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
454        .Default(~0U);
455    if (Model == ~0U) {
456      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
457      Success = false;
458    } else {
459      Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
460    }
461  }
462
463  if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
464    StringRef Val = A->getValue();
465    if (Val == "fast")
466      Opts.setFPContractMode(CodeGenOptions::FPC_Fast);
467    else if (Val == "on")
468      Opts.setFPContractMode(CodeGenOptions::FPC_On);
469    else if (Val == "off")
470      Opts.setFPContractMode(CodeGenOptions::FPC_Off);
471    else
472      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
473  }
474
475  return Success;
476}
477
478static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
479                                      ArgList &Args) {
480  using namespace options;
481  Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
482  Opts.Targets = Args.getAllArgValues(OPT_MT);
483  Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
484  Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
485  Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
486  Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
487  Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
488  Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
489}
490
491bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
492                                DiagnosticsEngine *Diags) {
493  using namespace options;
494  bool Success = true;
495
496  Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
497  Opts.DiagnosticSerializationFile =
498    Args.getLastArgValue(OPT_diagnostic_serialized_file);
499  Opts.IgnoreWarnings = Args.hasArg(OPT_w);
500  Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
501  Opts.Pedantic = Args.hasArg(OPT_pedantic);
502  Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
503  Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
504  Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
505  Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
506                                 OPT_fno_show_column,
507                                 /*Default=*/true);
508  Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
509  Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
510  Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
511
512  // Default behavior is to not to show note include stacks.
513  Opts.ShowNoteIncludeStack = false;
514  if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
515                               OPT_fno_diagnostics_show_note_include_stack))
516    if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
517      Opts.ShowNoteIncludeStack = true;
518
519  StringRef ShowOverloads =
520    Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
521  if (ShowOverloads == "best")
522    Opts.setShowOverloads(Ovl_Best);
523  else if (ShowOverloads == "all")
524    Opts.setShowOverloads(Ovl_All);
525  else {
526    Success = false;
527    if (Diags)
528      Diags->Report(diag::err_drv_invalid_value)
529      << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
530      << ShowOverloads;
531  }
532
533  StringRef ShowCategory =
534    Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
535  if (ShowCategory == "none")
536    Opts.ShowCategories = 0;
537  else if (ShowCategory == "id")
538    Opts.ShowCategories = 1;
539  else if (ShowCategory == "name")
540    Opts.ShowCategories = 2;
541  else {
542    Success = false;
543    if (Diags)
544      Diags->Report(diag::err_drv_invalid_value)
545      << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
546      << ShowCategory;
547  }
548
549  StringRef Format =
550    Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
551  if (Format == "clang")
552    Opts.setFormat(DiagnosticOptions::Clang);
553  else if (Format == "msvc")
554    Opts.setFormat(DiagnosticOptions::Msvc);
555  else if (Format == "vi")
556    Opts.setFormat(DiagnosticOptions::Vi);
557  else {
558    Success = false;
559    if (Diags)
560      Diags->Report(diag::err_drv_invalid_value)
561      << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
562      << Format;
563  }
564
565  Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
566  Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
567  Opts.ShowPresumedLoc = !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
568  Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
569  Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
570  Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
571  Opts.ErrorLimit = Args.getLastArgIntValue(OPT_ferror_limit, 0, Diags);
572  Opts.MacroBacktraceLimit
573    = Args.getLastArgIntValue(OPT_fmacro_backtrace_limit,
574                         DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
575  Opts.TemplateBacktraceLimit
576    = Args.getLastArgIntValue(OPT_ftemplate_backtrace_limit,
577                         DiagnosticOptions::DefaultTemplateBacktraceLimit,
578                         Diags);
579  Opts.ConstexprBacktraceLimit
580    = Args.getLastArgIntValue(OPT_fconstexpr_backtrace_limit,
581                         DiagnosticOptions::DefaultConstexprBacktraceLimit,
582                         Diags);
583  Opts.TabStop = Args.getLastArgIntValue(OPT_ftabstop,
584                                    DiagnosticOptions::DefaultTabStop, Diags);
585  if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
586    Opts.TabStop = DiagnosticOptions::DefaultTabStop;
587    if (Diags)
588      Diags->Report(diag::warn_ignoring_ftabstop_value)
589      << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
590  }
591  Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
592  addWarningArgs(Args, Opts.Warnings);
593
594  return Success;
595}
596
597static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
598  Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
599}
600
601static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
602                                   DiagnosticsEngine &Diags) {
603  using namespace options;
604  Opts.ProgramAction = frontend::ParseSyntaxOnly;
605  if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
606    switch (A->getOption().getID()) {
607    default:
608      llvm_unreachable("Invalid option in group!");
609    case OPT_ast_list:
610      Opts.ProgramAction = frontend::ASTDeclList; break;
611    case OPT_ast_dump:
612      Opts.ProgramAction = frontend::ASTDump; break;
613    case OPT_ast_dump_xml:
614      Opts.ProgramAction = frontend::ASTDumpXML; break;
615    case OPT_ast_print:
616      Opts.ProgramAction = frontend::ASTPrint; break;
617    case OPT_ast_view:
618      Opts.ProgramAction = frontend::ASTView; break;
619    case OPT_dump_raw_tokens:
620      Opts.ProgramAction = frontend::DumpRawTokens; break;
621    case OPT_dump_tokens:
622      Opts.ProgramAction = frontend::DumpTokens; break;
623    case OPT_S:
624      Opts.ProgramAction = frontend::EmitAssembly; break;
625    case OPT_emit_llvm_bc:
626      Opts.ProgramAction = frontend::EmitBC; break;
627    case OPT_emit_html:
628      Opts.ProgramAction = frontend::EmitHTML; break;
629    case OPT_emit_llvm:
630      Opts.ProgramAction = frontend::EmitLLVM; break;
631    case OPT_emit_llvm_only:
632      Opts.ProgramAction = frontend::EmitLLVMOnly; break;
633    case OPT_emit_codegen_only:
634      Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
635    case OPT_emit_obj:
636      Opts.ProgramAction = frontend::EmitObj; break;
637    case OPT_fixit_EQ:
638      Opts.FixItSuffix = A->getValue();
639      // fall-through!
640    case OPT_fixit:
641      Opts.ProgramAction = frontend::FixIt; break;
642    case OPT_emit_module:
643      Opts.ProgramAction = frontend::GenerateModule; break;
644    case OPT_emit_pch:
645      Opts.ProgramAction = frontend::GeneratePCH; break;
646    case OPT_emit_pth:
647      Opts.ProgramAction = frontend::GeneratePTH; break;
648    case OPT_init_only:
649      Opts.ProgramAction = frontend::InitOnly; break;
650    case OPT_fsyntax_only:
651      Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
652    case OPT_module_file_info:
653      Opts.ProgramAction = frontend::ModuleFileInfo; break;
654    case OPT_print_decl_contexts:
655      Opts.ProgramAction = frontend::PrintDeclContext; break;
656    case OPT_print_preamble:
657      Opts.ProgramAction = frontend::PrintPreamble; break;
658    case OPT_E:
659      Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
660    case OPT_rewrite_macros:
661      Opts.ProgramAction = frontend::RewriteMacros; break;
662    case OPT_rewrite_objc:
663      Opts.ProgramAction = frontend::RewriteObjC; break;
664    case OPT_rewrite_test:
665      Opts.ProgramAction = frontend::RewriteTest; break;
666    case OPT_analyze:
667      Opts.ProgramAction = frontend::RunAnalysis; break;
668    case OPT_migrate:
669      Opts.ProgramAction = frontend::MigrateSource; break;
670    case OPT_Eonly:
671      Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
672    }
673  }
674
675  if (const Arg* A = Args.getLastArg(OPT_plugin)) {
676    Opts.Plugins.push_back(A->getValue(0));
677    Opts.ProgramAction = frontend::PluginAction;
678    Opts.ActionName = A->getValue();
679
680    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
681           end = Args.filtered_end(); it != end; ++it) {
682      if ((*it)->getValue(0) == Opts.ActionName)
683        Opts.PluginArgs.push_back((*it)->getValue(1));
684    }
685  }
686
687  Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
688  Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
689  for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
690    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
691           end = Args.filtered_end(); it != end; ++it) {
692      if ((*it)->getValue(0) == Opts.AddPluginActions[i])
693        Opts.AddPluginArgs[i].push_back((*it)->getValue(1));
694    }
695  }
696
697  if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
698    Opts.CodeCompletionAt =
699      ParsedSourceLocation::FromString(A->getValue());
700    if (Opts.CodeCompletionAt.FileName.empty())
701      Diags.Report(diag::err_drv_invalid_value)
702        << A->getAsString(Args) << A->getValue();
703  }
704  Opts.DisableFree = Args.hasArg(OPT_disable_free);
705
706  Opts.OutputFile = Args.getLastArgValue(OPT_o);
707  Opts.Plugins = Args.getAllArgValues(OPT_load);
708  Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
709  Opts.ShowHelp = Args.hasArg(OPT_help);
710  Opts.ShowStats = Args.hasArg(OPT_print_stats);
711  Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
712  Opts.ShowVersion = Args.hasArg(OPT_version);
713  Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
714  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
715  Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
716  Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
717  Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
718  Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
719  Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
720  Opts.UseGlobalModuleIndex = !Args.hasArg(OPT_fno_modules_global_index);
721  Opts.GenerateGlobalModuleIndex = Opts.UseGlobalModuleIndex;
722
723  Opts.CodeCompleteOpts.IncludeMacros
724    = Args.hasArg(OPT_code_completion_macros);
725  Opts.CodeCompleteOpts.IncludeCodePatterns
726    = Args.hasArg(OPT_code_completion_patterns);
727  Opts.CodeCompleteOpts.IncludeGlobals
728    = !Args.hasArg(OPT_no_code_completion_globals);
729  Opts.CodeCompleteOpts.IncludeBriefComments
730    = Args.hasArg(OPT_code_completion_brief_comments);
731
732  Opts.OverrideRecordLayoutsFile
733    = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
734  if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
735                                     OPT_arcmt_modify,
736                                     OPT_arcmt_migrate)) {
737    switch (A->getOption().getID()) {
738    default:
739      llvm_unreachable("missed a case");
740    case OPT_arcmt_check:
741      Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
742      break;
743    case OPT_arcmt_modify:
744      Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
745      break;
746    case OPT_arcmt_migrate:
747      Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
748      break;
749    }
750  }
751  Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
752  Opts.ARCMTMigrateReportOut
753    = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
754  Opts.ARCMTMigrateEmitARCErrors
755    = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
756
757  if (Args.hasArg(OPT_objcmt_migrate_literals))
758    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
759  if (Args.hasArg(OPT_objcmt_migrate_subscripting))
760    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
761
762  if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
763      Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
764    Diags.Report(diag::err_drv_argument_not_allowed_with)
765      << "ARC migration" << "ObjC migration";
766  }
767
768  InputKind DashX = IK_None;
769  if (const Arg *A = Args.getLastArg(OPT_x)) {
770    DashX = llvm::StringSwitch<InputKind>(A->getValue())
771      .Case("c", IK_C)
772      .Case("cl", IK_OpenCL)
773      .Case("cuda", IK_CUDA)
774      .Case("c++", IK_CXX)
775      .Case("objective-c", IK_ObjC)
776      .Case("objective-c++", IK_ObjCXX)
777      .Case("cpp-output", IK_PreprocessedC)
778      .Case("assembler-with-cpp", IK_Asm)
779      .Case("c++-cpp-output", IK_PreprocessedCXX)
780      .Case("objective-c-cpp-output", IK_PreprocessedObjC)
781      .Case("objc-cpp-output", IK_PreprocessedObjC)
782      .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
783      .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
784      .Case("c-header", IK_C)
785      .Case("cl-header", IK_OpenCL)
786      .Case("objective-c-header", IK_ObjC)
787      .Case("c++-header", IK_CXX)
788      .Case("objective-c++-header", IK_ObjCXX)
789      .Cases("ast", "pcm", IK_AST)
790      .Case("ir", IK_LLVM_IR)
791      .Default(IK_None);
792    if (DashX == IK_None)
793      Diags.Report(diag::err_drv_invalid_value)
794        << A->getAsString(Args) << A->getValue();
795  }
796
797  // '-' is the default input if none is given.
798  std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
799  Opts.Inputs.clear();
800  if (Inputs.empty())
801    Inputs.push_back("-");
802  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
803    InputKind IK = DashX;
804    if (IK == IK_None) {
805      IK = FrontendOptions::getInputKindForExtension(
806        StringRef(Inputs[i]).rsplit('.').second);
807      // FIXME: Remove this hack.
808      if (i == 0)
809        DashX = IK;
810    }
811    Opts.Inputs.push_back(FrontendInputFile(Inputs[i], IK));
812  }
813
814  return DashX;
815}
816
817std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
818                                                 void *MainAddr) {
819  llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
820
821  if (!P.isEmpty()) {
822    P.eraseComponent();  // Remove /clang from foo/bin/clang
823    P.eraseComponent();  // Remove /bin   from foo/bin
824
825    // Get foo/lib/clang/<version>/include
826    P.appendComponent("lib");
827    P.appendComponent("clang");
828    P.appendComponent(CLANG_VERSION_STRING);
829  }
830
831  return P.str();
832}
833
834static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
835  using namespace options;
836  Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
837  Opts.Verbose = Args.hasArg(OPT_v);
838  Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
839  Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
840  Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
841  if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
842    Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
843  Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
844  Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodules_cache_path);
845  Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
846  Opts.ModuleCachePruneInterval
847    = Args.getLastArgIntValue(OPT_fmodules_prune_interval, 7*24*60*60);
848  Opts.ModuleCachePruneAfter
849    = Args.getLastArgIntValue(OPT_fmodules_prune_after, 31*24*60*60);
850  for (arg_iterator it = Args.filtered_begin(OPT_fmodules_ignore_macro),
851       ie = Args.filtered_end(); it != ie; ++it) {
852    StringRef MacroDef = (*it)->getValue();
853    Opts.ModulesIgnoreMacros.insert(MacroDef.split('=').first);
854  }
855
856  // Add -I..., -F..., and -index-header-map options in order.
857  bool IsIndexHeaderMap = false;
858  for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F,
859                                             OPT_index_header_map),
860       ie = Args.filtered_end(); it != ie; ++it) {
861    if ((*it)->getOption().matches(OPT_index_header_map)) {
862      // -index-header-map applies to the next -I or -F.
863      IsIndexHeaderMap = true;
864      continue;
865    }
866
867    frontend::IncludeDirGroup Group
868      = IsIndexHeaderMap? frontend::IndexHeaderMap : frontend::Angled;
869
870    Opts.AddPath((*it)->getValue(), Group,
871                 /*IsFramework=*/ (*it)->getOption().matches(OPT_F), true);
872    IsIndexHeaderMap = false;
873  }
874
875  // Add -iprefix/-iwithprefix/-iwithprefixbefore options.
876  StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
877  for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
878                                             OPT_iwithprefixbefore),
879         ie = Args.filtered_end(); it != ie; ++it) {
880    const Arg *A = *it;
881    if (A->getOption().matches(OPT_iprefix))
882      Prefix = A->getValue();
883    else if (A->getOption().matches(OPT_iwithprefix))
884      Opts.AddPath(Prefix.str() + A->getValue(),
885                   frontend::After, false, true);
886    else
887      Opts.AddPath(Prefix.str() + A->getValue(),
888                   frontend::Angled, false, true);
889  }
890
891  for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
892         ie = Args.filtered_end(); it != ie; ++it)
893    Opts.AddPath((*it)->getValue(), frontend::After, false, true);
894  for (arg_iterator it = Args.filtered_begin(OPT_iquote),
895         ie = Args.filtered_end(); it != ie; ++it)
896    Opts.AddPath((*it)->getValue(), frontend::Quoted, false, true);
897  for (arg_iterator it = Args.filtered_begin(OPT_isystem,
898         OPT_iwithsysroot), ie = Args.filtered_end(); it != ie; ++it)
899    Opts.AddPath((*it)->getValue(), frontend::System, false,
900                 !(*it)->getOption().matches(OPT_iwithsysroot));
901  for (arg_iterator it = Args.filtered_begin(OPT_iframework),
902         ie = Args.filtered_end(); it != ie; ++it)
903    Opts.AddPath((*it)->getValue(), frontend::System, true, true);
904
905  // Add the paths for the various language specific isystem flags.
906  for (arg_iterator it = Args.filtered_begin(OPT_c_isystem),
907       ie = Args.filtered_end(); it != ie; ++it)
908    Opts.AddPath((*it)->getValue(), frontend::CSystem, false, true);
909  for (arg_iterator it = Args.filtered_begin(OPT_cxx_isystem),
910       ie = Args.filtered_end(); it != ie; ++it)
911    Opts.AddPath((*it)->getValue(), frontend::CXXSystem, false, true);
912  for (arg_iterator it = Args.filtered_begin(OPT_objc_isystem),
913       ie = Args.filtered_end(); it != ie; ++it)
914    Opts.AddPath((*it)->getValue(), frontend::ObjCSystem, false,true);
915  for (arg_iterator it = Args.filtered_begin(OPT_objcxx_isystem),
916       ie = Args.filtered_end(); it != ie; ++it)
917    Opts.AddPath((*it)->getValue(), frontend::ObjCXXSystem, false, true);
918
919  // Add the internal paths from a driver that detects standard include paths.
920  for (arg_iterator I = Args.filtered_begin(OPT_internal_isystem,
921                                            OPT_internal_externc_isystem),
922                    E = Args.filtered_end();
923       I != E; ++I) {
924    frontend::IncludeDirGroup Group = frontend::System;
925    if ((*I)->getOption().matches(OPT_internal_externc_isystem))
926      Group = frontend::ExternCSystem;
927    Opts.AddPath((*I)->getValue(), Group, false, true);
928  }
929
930  // Add the path prefixes which are implicitly treated as being system headers.
931  for (arg_iterator I = Args.filtered_begin(OPT_isystem_prefix,
932                                            OPT_ino_system_prefix),
933                    E = Args.filtered_end();
934       I != E; ++I)
935    Opts.AddSystemHeaderPrefix((*I)->getValue(),
936                               (*I)->getOption().matches(OPT_isystem_prefix));
937}
938
939void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
940                                         LangStandard::Kind LangStd) {
941  // Set some properties which depend solely on the input kind; it would be nice
942  // to move these to the language standard, and have the driver resolve the
943  // input kind + language standard.
944  if (IK == IK_Asm) {
945    Opts.AsmPreprocessor = 1;
946  } else if (IK == IK_ObjC ||
947             IK == IK_ObjCXX ||
948             IK == IK_PreprocessedObjC ||
949             IK == IK_PreprocessedObjCXX) {
950    Opts.ObjC1 = Opts.ObjC2 = 1;
951  }
952
953  if (LangStd == LangStandard::lang_unspecified) {
954    // Based on the base language, pick one.
955    switch (IK) {
956    case IK_None:
957    case IK_AST:
958    case IK_LLVM_IR:
959      llvm_unreachable("Invalid input kind!");
960    case IK_OpenCL:
961      LangStd = LangStandard::lang_opencl;
962      break;
963    case IK_CUDA:
964      LangStd = LangStandard::lang_cuda;
965      break;
966    case IK_Asm:
967    case IK_C:
968    case IK_PreprocessedC:
969    case IK_ObjC:
970    case IK_PreprocessedObjC:
971      LangStd = LangStandard::lang_gnu99;
972      break;
973    case IK_CXX:
974    case IK_PreprocessedCXX:
975    case IK_ObjCXX:
976    case IK_PreprocessedObjCXX:
977      LangStd = LangStandard::lang_gnucxx98;
978      break;
979    }
980  }
981
982  const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
983  Opts.LineComment = Std.hasLineComments();
984  Opts.C99 = Std.isC99();
985  Opts.C11 = Std.isC11();
986  Opts.CPlusPlus = Std.isCPlusPlus();
987  Opts.CPlusPlus11 = Std.isCPlusPlus11();
988  Opts.CPlusPlus1y = Std.isCPlusPlus1y();
989  Opts.Digraphs = Std.hasDigraphs();
990  Opts.GNUMode = Std.isGNUMode();
991  Opts.GNUInline = !Std.isC99();
992  Opts.HexFloats = Std.hasHexFloats();
993  Opts.ImplicitInt = Std.hasImplicitInt();
994
995  // Set OpenCL Version.
996  if (LangStd == LangStandard::lang_opencl) {
997    Opts.OpenCL = 1;
998    Opts.OpenCLVersion = 100;
999  }
1000  else if (LangStd == LangStandard::lang_opencl11) {
1001      Opts.OpenCL = 1;
1002      Opts.OpenCLVersion = 110;
1003  }
1004  else if (LangStd == LangStandard::lang_opencl12) {
1005    Opts.OpenCL = 1;
1006    Opts.OpenCLVersion = 120;
1007  }
1008
1009  // OpenCL has some additional defaults.
1010  if (Opts.OpenCL) {
1011    Opts.AltiVec = 0;
1012    Opts.CXXOperatorNames = 1;
1013    Opts.LaxVectorConversions = 0;
1014    Opts.DefaultFPContract = 1;
1015    Opts.NativeHalfType = 1;
1016  }
1017
1018  if (LangStd == LangStandard::lang_cuda)
1019    Opts.CUDA = 1;
1020
1021  // OpenCL and C++ both have bool, true, false keywords.
1022  Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1023
1024  // C++ has wchar_t keyword.
1025  Opts.WChar = Opts.CPlusPlus;
1026
1027  Opts.GNUKeywords = Opts.GNUMode;
1028  Opts.CXXOperatorNames = Opts.CPlusPlus;
1029
1030  // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1031  // is specified, or -std is set to a conforming mode.
1032  Opts.Trigraphs = !Opts.GNUMode;
1033
1034  Opts.DollarIdents = !Opts.AsmPreprocessor;
1035}
1036
1037/// Attempt to parse a visibility value out of the given argument.
1038static Visibility parseVisibility(Arg *arg, ArgList &args,
1039                                  DiagnosticsEngine &diags) {
1040  StringRef value = arg->getValue();
1041  if (value == "default") {
1042    return DefaultVisibility;
1043  } else if (value == "hidden") {
1044    return HiddenVisibility;
1045  } else if (value == "protected") {
1046    // FIXME: diagnose if target does not support protected visibility
1047    return ProtectedVisibility;
1048  }
1049
1050  diags.Report(diag::err_drv_invalid_value)
1051    << arg->getAsString(args) << value;
1052  return DefaultVisibility;
1053}
1054
1055static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1056                          DiagnosticsEngine &Diags) {
1057  // FIXME: Cleanup per-file based stuff.
1058  LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1059  if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1060    LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1061#define LANGSTANDARD(id, name, desc, features) \
1062      .Case(name, LangStandard::lang_##id)
1063#include "clang/Frontend/LangStandards.def"
1064      .Default(LangStandard::lang_unspecified);
1065    if (LangStd == LangStandard::lang_unspecified)
1066      Diags.Report(diag::err_drv_invalid_value)
1067        << A->getAsString(Args) << A->getValue();
1068    else {
1069      // Valid standard, check to make sure language and standard are compatable.
1070      const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1071      switch (IK) {
1072      case IK_C:
1073      case IK_ObjC:
1074      case IK_PreprocessedC:
1075      case IK_PreprocessedObjC:
1076        if (!(Std.isC89() || Std.isC99()))
1077          Diags.Report(diag::err_drv_argument_not_allowed_with)
1078            << A->getAsString(Args) << "C/ObjC";
1079        break;
1080      case IK_CXX:
1081      case IK_ObjCXX:
1082      case IK_PreprocessedCXX:
1083      case IK_PreprocessedObjCXX:
1084        if (!Std.isCPlusPlus())
1085          Diags.Report(diag::err_drv_argument_not_allowed_with)
1086            << A->getAsString(Args) << "C++/ObjC++";
1087        break;
1088      case IK_OpenCL:
1089        if (!Std.isC99())
1090          Diags.Report(diag::err_drv_argument_not_allowed_with)
1091            << A->getAsString(Args) << "OpenCL";
1092        break;
1093      case IK_CUDA:
1094        if (!Std.isCPlusPlus())
1095          Diags.Report(diag::err_drv_argument_not_allowed_with)
1096            << A->getAsString(Args) << "CUDA";
1097        break;
1098      default:
1099        break;
1100      }
1101    }
1102  }
1103
1104  // -cl-std only applies for OpenCL language standards.
1105  // Override the -std option in this case.
1106  if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1107    LangStandard::Kind OpenCLLangStd
1108    = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1109    .Case("CL", LangStandard::lang_opencl)
1110    .Case("CL1.1", LangStandard::lang_opencl11)
1111    .Case("CL1.2", LangStandard::lang_opencl12)
1112    .Default(LangStandard::lang_unspecified);
1113
1114    if (OpenCLLangStd == LangStandard::lang_unspecified) {
1115      Diags.Report(diag::err_drv_invalid_value)
1116      << A->getAsString(Args) << A->getValue();
1117    }
1118    else
1119      LangStd = OpenCLLangStd;
1120  }
1121
1122  CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1123
1124  // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1125  // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1126  // while a subset (the non-C++ GNU keywords) is provided by GCC's
1127  // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1128  // name, as it doesn't seem a useful distinction.
1129  Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1130                                  Opts.GNUKeywords);
1131
1132  if (Args.hasArg(OPT_fno_operator_names))
1133    Opts.CXXOperatorNames = 0;
1134
1135  if (Opts.ObjC1) {
1136    if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1137      StringRef value = arg->getValue();
1138      if (Opts.ObjCRuntime.tryParse(value))
1139        Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1140    }
1141
1142    if (Args.hasArg(OPT_fobjc_gc_only))
1143      Opts.setGC(LangOptions::GCOnly);
1144    else if (Args.hasArg(OPT_fobjc_gc))
1145      Opts.setGC(LangOptions::HybridGC);
1146    else if (Args.hasArg(OPT_fobjc_arc)) {
1147      Opts.ObjCAutoRefCount = 1;
1148      if (!Opts.ObjCRuntime.allowsARC())
1149        Diags.Report(diag::err_arc_unsupported_on_runtime);
1150
1151      // Only set ObjCARCWeak if ARC is enabled.
1152      if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1153        Opts.ObjCARCWeak = 1;
1154      else
1155        Opts.ObjCARCWeak = Opts.ObjCRuntime.allowsWeak();
1156    }
1157
1158    if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1159      Opts.ObjCInferRelatedResultType = 0;
1160  }
1161
1162  if (Args.hasArg(OPT_fgnu89_inline))
1163    Opts.GNUInline = 1;
1164
1165  if (Args.hasArg(OPT_fapple_kext)) {
1166    if (!Opts.CPlusPlus)
1167      Diags.Report(diag::warn_c_kext);
1168    else
1169      Opts.AppleKext = 1;
1170  }
1171
1172  if (Args.hasArg(OPT_print_ivar_layout))
1173    Opts.ObjCGCBitmapPrint = 1;
1174  if (Args.hasArg(OPT_fno_constant_cfstrings))
1175    Opts.NoConstantCFStrings = 1;
1176
1177  if (Args.hasArg(OPT_faltivec))
1178    Opts.AltiVec = 1;
1179
1180  if (Args.hasArg(OPT_pthread))
1181    Opts.POSIXThreads = 1;
1182
1183  // The value-visibility mode defaults to "default".
1184  if (Arg *visOpt = Args.getLastArg(OPT_fvisibility)) {
1185    Opts.setValueVisibilityMode(parseVisibility(visOpt, Args, Diags));
1186  } else {
1187    Opts.setValueVisibilityMode(DefaultVisibility);
1188  }
1189
1190  // The type-visibility mode defaults to the value-visibility mode.
1191  if (Arg *typeVisOpt = Args.getLastArg(OPT_ftype_visibility)) {
1192    Opts.setTypeVisibilityMode(parseVisibility(typeVisOpt, Args, Diags));
1193  } else {
1194    Opts.setTypeVisibilityMode(Opts.getValueVisibilityMode());
1195  }
1196
1197  if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1198    Opts.InlineVisibilityHidden = 1;
1199
1200  if (Args.hasArg(OPT_ftrapv)) {
1201    Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1202    // Set the handler, if one is specified.
1203    Opts.OverflowHandler =
1204        Args.getLastArgValue(OPT_ftrapv_handler);
1205  }
1206  else if (Args.hasArg(OPT_fwrapv))
1207    Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1208
1209  if (Args.hasArg(OPT_trigraphs))
1210    Opts.Trigraphs = 1;
1211
1212  Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1213                                   OPT_fno_dollars_in_identifiers,
1214                                   Opts.DollarIdents);
1215  Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1216  Opts.MicrosoftExt
1217    = Args.hasArg(OPT_fms_extensions) || Args.hasArg(OPT_fms_compatibility);
1218  Opts.MicrosoftMode = Args.hasArg(OPT_fms_compatibility);
1219  Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
1220  Opts.MSCVersion = Args.getLastArgIntValue(OPT_fmsc_version, 0, Diags);
1221  Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1222  Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1223  Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
1224                                   Opts.ConstStrings);
1225  if (Args.hasArg(OPT_fno_lax_vector_conversions))
1226    Opts.LaxVectorConversions = 0;
1227  if (Args.hasArg(OPT_fno_threadsafe_statics))
1228    Opts.ThreadsafeStatics = 0;
1229  Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1230  Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
1231  Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
1232  Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1233  Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
1234
1235  Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1236  Opts.Blocks = Args.hasArg(OPT_fblocks);
1237  Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
1238  Opts.Modules = Args.hasArg(OPT_fmodules);
1239  Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1240  Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
1241  Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1242  Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1243  Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1244  Opts.FormatExtensions = Args.hasArg(OPT_fformat_extensions);
1245  Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1246  Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1247  Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1248  Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1249  Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1250  Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1251  Opts.InstantiationDepth = Args.getLastArgIntValue(OPT_ftemplate_depth, 256,
1252                                                    Diags);
1253  Opts.ConstexprCallDepth = Args.getLastArgIntValue(OPT_fconstexpr_depth, 512,
1254                                                    Diags);
1255  Opts.BracketDepth = Args.getLastArgIntValue(OPT_fbracket_depth, 256, Diags);
1256  Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
1257  Opts.NumLargeByValueCopy = Args.getLastArgIntValue(OPT_Wlarge_by_value_copy_EQ,
1258                                                    0, Diags);
1259  Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
1260  Opts.ObjCConstantStringClass =
1261    Args.getLastArgValue(OPT_fconstant_string_class);
1262  Opts.ObjCDefaultSynthProperties =
1263    Args.hasArg(OPT_fobjc_default_synthesize_properties);
1264  Opts.EncodeExtendedBlockSig =
1265    Args.hasArg(OPT_fencode_extended_block_signature);
1266  Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1267  Opts.PackStruct = Args.getLastArgIntValue(OPT_fpack_struct_EQ, 0, Diags);
1268  Opts.PICLevel = Args.getLastArgIntValue(OPT_pic_level, 0, Diags);
1269  Opts.PIELevel = Args.getLastArgIntValue(OPT_pie_level, 0, Diags);
1270  Opts.Static = Args.hasArg(OPT_static_define);
1271  Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
1272  Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
1273                        || Args.hasArg(OPT_fdump_record_layouts);
1274  Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1275  Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1276  Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1277  Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
1278  Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
1279  Opts.MRTD = Args.hasArg(OPT_mrtd);
1280  Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
1281  Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
1282  Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
1283  Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
1284  Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
1285  Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
1286  Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
1287  Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
1288
1289  // Check if -fopenmp is specified.
1290  Opts.OpenMP = Args.hasArg(OPT_fopenmp);
1291
1292  // Record whether the __DEPRECATED define was requested.
1293  Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
1294                                 OPT_fno_deprecated_macro,
1295                                 Opts.Deprecated);
1296
1297  // FIXME: Eliminate this dependency.
1298  unsigned Opt = getOptimizationLevel(Args, IK, Diags),
1299       OptSize = getOptimizationLevelSize(Args);
1300  Opts.Optimize = Opt != 0;
1301  Opts.OptimizeSize = OptSize != 0;
1302
1303  // This is the __NO_INLINE__ define, which just depends on things like the
1304  // optimization level and -fno-inline, not actually whether the backend has
1305  // inlining enabled.
1306  Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
1307
1308  Opts.FastMath = Args.hasArg(OPT_ffast_math);
1309  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only);
1310
1311  Opts.RetainCommentsFromSystemHeaders =
1312      Args.hasArg(OPT_fretain_comments_from_system_headers);
1313
1314  unsigned SSP = Args.getLastArgIntValue(OPT_stack_protector, 0, Diags);
1315  switch (SSP) {
1316  default:
1317    Diags.Report(diag::err_drv_invalid_value)
1318      << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1319    break;
1320  case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
1321  case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
1322  case 2: Opts.setStackProtector(LangOptions::SSPReq); break;
1323  }
1324
1325  // Parse -fsanitize= arguments.
1326  std::vector<std::string> Sanitizers = Args.getAllArgValues(OPT_fsanitize_EQ);
1327  for (unsigned I = 0, N = Sanitizers.size(); I != N; ++I) {
1328    // Since the Opts.Sanitize* values are bitfields, it's a little tricky to
1329    // efficiently map string values to them. Perform the mapping indirectly:
1330    // convert strings to enumerated values, then switch over the enum to set
1331    // the right bitfield value.
1332    enum Sanitizer {
1333#define SANITIZER(NAME, ID) \
1334      ID,
1335#include "clang/Basic/Sanitizers.def"
1336      Unknown
1337    };
1338    switch (llvm::StringSwitch<unsigned>(Sanitizers[I])
1339#define SANITIZER(NAME, ID) \
1340              .Case(NAME, ID)
1341#include "clang/Basic/Sanitizers.def"
1342              .Default(Unknown)) {
1343#define SANITIZER(NAME, ID) \
1344    case ID: \
1345      Opts.Sanitize.ID = true; \
1346      break;
1347#include "clang/Basic/Sanitizers.def"
1348
1349    case Unknown:
1350      Diags.Report(diag::err_drv_invalid_value)
1351        << "-fsanitize=" << Sanitizers[I];
1352      break;
1353    }
1354  }
1355}
1356
1357static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1358                                  FileManager &FileMgr,
1359                                  DiagnosticsEngine &Diags) {
1360  using namespace options;
1361  Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1362  Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1363  if (const Arg *A = Args.getLastArg(OPT_token_cache))
1364      Opts.TokenCache = A->getValue();
1365  else
1366    Opts.TokenCache = Opts.ImplicitPTHInclude;
1367  Opts.UsePredefines = !Args.hasArg(OPT_undef);
1368  Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1369  Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1370
1371  Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
1372  for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
1373         ie = Args.filtered_end(); it != ie; ++it) {
1374    const Arg *A = *it;
1375    Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
1376  }
1377
1378  if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1379    StringRef Value(A->getValue());
1380    size_t Comma = Value.find(',');
1381    unsigned Bytes = 0;
1382    unsigned EndOfLine = 0;
1383
1384    if (Comma == StringRef::npos ||
1385        Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1386        Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1387      Diags.Report(diag::err_drv_preamble_format);
1388    else {
1389      Opts.PrecompiledPreambleBytes.first = Bytes;
1390      Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1391    }
1392  }
1393
1394  // Add macros from the command line.
1395  for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1396         ie = Args.filtered_end(); it != ie; ++it) {
1397    if ((*it)->getOption().matches(OPT_D))
1398      Opts.addMacroDef((*it)->getValue());
1399    else
1400      Opts.addMacroUndef((*it)->getValue());
1401  }
1402
1403  Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1404
1405  // Add the ordered list of -includes.
1406  for (arg_iterator it = Args.filtered_begin(OPT_include),
1407         ie = Args.filtered_end(); it != ie; ++it) {
1408    const Arg *A = *it;
1409    Opts.Includes.push_back(A->getValue());
1410  }
1411
1412  for (arg_iterator it = Args.filtered_begin(OPT_chain_include),
1413         ie = Args.filtered_end(); it != ie; ++it) {
1414    const Arg *A = *it;
1415    Opts.ChainedIncludes.push_back(A->getValue());
1416  }
1417
1418  // Include 'altivec.h' if -faltivec option present
1419  if (Args.hasArg(OPT_faltivec))
1420    Opts.Includes.push_back("altivec.h");
1421
1422  for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1423         ie = Args.filtered_end(); it != ie; ++it) {
1424    const Arg *A = *it;
1425    std::pair<StringRef,StringRef> Split =
1426      StringRef(A->getValue()).split(';');
1427
1428    if (Split.second.empty()) {
1429      Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1430      continue;
1431    }
1432
1433    Opts.addRemappedFile(Split.first, Split.second);
1434  }
1435
1436  if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
1437    StringRef Name = A->getValue();
1438    unsigned Library = llvm::StringSwitch<unsigned>(Name)
1439      .Case("libc++", ARCXX_libcxx)
1440      .Case("libstdc++", ARCXX_libstdcxx)
1441      .Case("none", ARCXX_nolib)
1442      .Default(~0U);
1443    if (Library == ~0U)
1444      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1445    else
1446      Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
1447  }
1448}
1449
1450static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1451                                        ArgList &Args,
1452                                        frontend::ActionKind Action) {
1453  using namespace options;
1454
1455  switch (Action) {
1456  case frontend::ASTDeclList:
1457  case frontend::ASTDump:
1458  case frontend::ASTDumpXML:
1459  case frontend::ASTPrint:
1460  case frontend::ASTView:
1461  case frontend::EmitAssembly:
1462  case frontend::EmitBC:
1463  case frontend::EmitHTML:
1464  case frontend::EmitLLVM:
1465  case frontend::EmitLLVMOnly:
1466  case frontend::EmitCodeGenOnly:
1467  case frontend::EmitObj:
1468  case frontend::FixIt:
1469  case frontend::GenerateModule:
1470  case frontend::GeneratePCH:
1471  case frontend::GeneratePTH:
1472  case frontend::ParseSyntaxOnly:
1473  case frontend::ModuleFileInfo:
1474  case frontend::PluginAction:
1475  case frontend::PrintDeclContext:
1476  case frontend::RewriteObjC:
1477  case frontend::RewriteTest:
1478  case frontend::RunAnalysis:
1479  case frontend::MigrateSource:
1480    Opts.ShowCPP = 0;
1481    break;
1482
1483  case frontend::DumpRawTokens:
1484  case frontend::DumpTokens:
1485  case frontend::InitOnly:
1486  case frontend::PrintPreamble:
1487  case frontend::PrintPreprocessedInput:
1488  case frontend::RewriteMacros:
1489  case frontend::RunPreprocessorOnly:
1490    Opts.ShowCPP = !Args.hasArg(OPT_dM);
1491    break;
1492  }
1493
1494  Opts.ShowComments = Args.hasArg(OPT_C);
1495  Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1496  Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1497  Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1498  Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
1499}
1500
1501static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1502  using namespace options;
1503  Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1504  Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
1505  Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1506  Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
1507  Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1508  Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1509
1510  // Use the default target triple if unspecified.
1511  if (Opts.Triple.empty())
1512    Opts.Triple = llvm::sys::getDefaultTargetTriple();
1513}
1514
1515//
1516
1517bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1518                                        const char *const *ArgBegin,
1519                                        const char *const *ArgEnd,
1520                                        DiagnosticsEngine &Diags) {
1521  bool Success = true;
1522
1523  // Parse the arguments.
1524  OwningPtr<OptTable> Opts(createDriverOptTable());
1525  unsigned MissingArgIndex, MissingArgCount;
1526  OwningPtr<InputArgList> Args(
1527    Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1528
1529  // Check for missing argument error.
1530  if (MissingArgCount) {
1531    Diags.Report(diag::err_drv_missing_argument)
1532      << Args->getArgString(MissingArgIndex) << MissingArgCount;
1533    Success = false;
1534  }
1535
1536  // Issue errors on unknown arguments.
1537  for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1538         ie = Args->filtered_end(); it != ie; ++it) {
1539    Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
1540    Success = false;
1541  }
1542
1543  // Issue errors on arguments that are not valid for CC1.
1544  for (ArgList::iterator I = Args->begin(), E = Args->end();
1545       I != E; ++I) {
1546    if (!(*I)->getOption().hasFlag(options::CC1Option)) {
1547      Diags.Report(diag::err_drv_unknown_argument) << (*I)->getAsString(*Args);
1548      Success = false;
1549    }
1550  }
1551
1552  Success = ParseAnalyzerArgs(*Res.getAnalyzerOpts(), *Args, Diags) && Success;
1553  Success = ParseMigratorArgs(Res.getMigratorOpts(), *Args) && Success;
1554  ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1555  Success = ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, &Diags)
1556            && Success;
1557  ParseCommentArgs(Res.getLangOpts()->CommentOpts, *Args);
1558  ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
1559  // FIXME: We shouldn't have to pass the DashX option around here
1560  InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1561  Success = ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags)
1562            && Success;
1563  ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1564  if (DashX != IK_AST && DashX != IK_LLVM_IR) {
1565    ParseLangArgs(*Res.getLangOpts(), *Args, DashX, Diags);
1566    if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
1567      Res.getLangOpts()->ObjCExceptions = 1;
1568  }
1569  // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
1570  // PCH file and find the original header name. Remove the need to do that in
1571  // ParsePreprocessorArgs and remove the FileManager
1572  // parameters from the function and the "FileManager.h" #include.
1573  FileManager FileMgr(Res.getFileSystemOpts());
1574  ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
1575  ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args,
1576                              Res.getFrontendOpts().ProgramAction);
1577  ParseTargetArgs(Res.getTargetOpts(), *Args);
1578
1579  return Success;
1580}
1581
1582namespace {
1583
1584  class ModuleSignature {
1585    SmallVector<uint64_t, 16> Data;
1586    unsigned CurBit;
1587    uint64_t CurValue;
1588
1589  public:
1590    ModuleSignature() : CurBit(0), CurValue(0) { }
1591
1592    void add(uint64_t Value, unsigned Bits);
1593    void add(StringRef Value);
1594    void flush();
1595
1596    llvm::APInt getAsInteger() const;
1597  };
1598}
1599
1600void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
1601  CurValue |= Value << CurBit;
1602  if (CurBit + NumBits < 64) {
1603    CurBit += NumBits;
1604    return;
1605  }
1606
1607  // Add the current word.
1608  Data.push_back(CurValue);
1609
1610  if (CurBit)
1611    CurValue = Value >> (64-CurBit);
1612  else
1613    CurValue = 0;
1614  CurBit = (CurBit+NumBits) & 63;
1615}
1616
1617void ModuleSignature::flush() {
1618  if (CurBit == 0)
1619    return;
1620
1621  Data.push_back(CurValue);
1622  CurBit = 0;
1623  CurValue = 0;
1624}
1625
1626void ModuleSignature::add(StringRef Value) {
1627  for (StringRef::iterator I = Value.begin(), IEnd = Value.end(); I != IEnd;++I)
1628    add(*I, 8);
1629}
1630
1631llvm::APInt ModuleSignature::getAsInteger() const {
1632  return llvm::APInt(Data.size() * 64, Data);
1633}
1634
1635std::string CompilerInvocation::getModuleHash() const {
1636  // Note: For QoI reasons, the things we use as a hash here should all be
1637  // dumped via the -module-info flag.
1638  using llvm::hash_code;
1639  using llvm::hash_value;
1640  using llvm::hash_combine;
1641
1642  // Start the signature with the compiler version.
1643  // FIXME: We'd rather use something more cryptographically sound than
1644  // CityHash, but this will do for now.
1645  hash_code code = hash_value(getClangFullRepositoryVersion());
1646
1647  // Extend the signature with the language options
1648#define LANGOPT(Name, Bits, Default, Description) \
1649   code = hash_combine(code, LangOpts->Name);
1650#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
1651  code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
1652#define BENIGN_LANGOPT(Name, Bits, Default, Description)
1653#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
1654#include "clang/Basic/LangOptions.def"
1655
1656  // Extend the signature with the target options.
1657  code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
1658                      TargetOpts->ABI, TargetOpts->CXXABI,
1659                      TargetOpts->LinkerVersion);
1660  for (unsigned i = 0, n = TargetOpts->FeaturesAsWritten.size(); i != n; ++i)
1661    code = hash_combine(code, TargetOpts->FeaturesAsWritten[i]);
1662
1663  // Extend the signature with preprocessor options.
1664  const PreprocessorOptions &ppOpts = getPreprocessorOpts();
1665  const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
1666  code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
1667
1668  std::vector<StringRef> MacroDefs;
1669  for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
1670            I = getPreprocessorOpts().Macros.begin(),
1671         IEnd = getPreprocessorOpts().Macros.end();
1672       I != IEnd; ++I) {
1673    // If we're supposed to ignore this macro for the purposes of modules,
1674    // don't put it into the hash.
1675    if (!hsOpts.ModulesIgnoreMacros.empty()) {
1676      // Check whether we're ignoring this macro.
1677      StringRef MacroDef = I->first;
1678      if (hsOpts.ModulesIgnoreMacros.count(MacroDef.split('=').first))
1679        continue;
1680    }
1681
1682    code = hash_combine(code, I->first, I->second);
1683  }
1684
1685  // Extend the signature with the sysroot.
1686  code = hash_combine(code, hsOpts.Sysroot, hsOpts.UseBuiltinIncludes,
1687                      hsOpts.UseStandardSystemIncludes,
1688                      hsOpts.UseStandardCXXIncludes,
1689                      hsOpts.UseLibcxx);
1690
1691  // Darwin-specific hack: if we have a sysroot, use the contents of
1692  //   $sysroot/System/Library/CoreServices/SystemVersion.plist
1693  // as part of the module hash.
1694  if (!hsOpts.Sysroot.empty()) {
1695    llvm::OwningPtr<llvm::MemoryBuffer> buffer;
1696    SmallString<128> systemVersionFile;
1697    systemVersionFile += hsOpts.Sysroot;
1698    llvm::sys::path::append(systemVersionFile, "System");
1699    llvm::sys::path::append(systemVersionFile, "Library");
1700    llvm::sys::path::append(systemVersionFile, "CoreServices");
1701    llvm::sys::path::append(systemVersionFile, "SystemVersion.plist");
1702    if (!llvm::MemoryBuffer::getFile(systemVersionFile, buffer)) {
1703      code = hash_combine(code, buffer.get()->getBuffer());
1704    }
1705  }
1706
1707  return llvm::APInt(64, code).toString(36, /*Signed=*/false);
1708}
1709