CompilerInvocation.cpp revision 3769f38264ba46a18059ad82a3a506f27bbf2537 
1//===--- CompilerInvocation.cpp -------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "clang/Frontend/CompilerInvocation.h"
11#include "clang/Basic/Diagnostic.h"
12#include "clang/Basic/FileManager.h"
13#include "clang/Basic/Version.h"
14#include "clang/Driver/Arg.h"
15#include "clang/Driver/ArgList.h"
16#include "clang/Driver/DriverDiagnostic.h"
17#include "clang/Driver/OptTable.h"
18#include "clang/Driver/Option.h"
19#include "clang/Driver/Options.h"
20#include "clang/Frontend/LangStandard.h"
21#include "clang/Lex/HeaderSearchOptions.h"
22#include "clang/Serialization/ASTReader.h"
23#include "llvm/ADT/Hashing.h"
24#include "llvm/ADT/OwningPtr.h"
25#include "llvm/ADT/SmallVector.h"
26#include "llvm/ADT/StringExtras.h"
27#include "llvm/ADT/StringSwitch.h"
28#include "llvm/ADT/Triple.h"
29#include "llvm/Support/ErrorHandling.h"
30#include "llvm/Support/Host.h"
31#include "llvm/Support/Path.h"
32using namespace clang;
33
34//===----------------------------------------------------------------------===//
35// Initialization.
36//===----------------------------------------------------------------------===//
37
38CompilerInvocationBase::CompilerInvocationBase()
39  : LangOpts(new LangOptions()), TargetOpts(new TargetOptions()),
40    DiagnosticOpts(new DiagnosticOptions()),
41    HeaderSearchOpts(new HeaderSearchOptions()),
42    PreprocessorOpts(new PreprocessorOptions()) {}
43
44CompilerInvocationBase::CompilerInvocationBase(const CompilerInvocationBase &X)
45  : RefCountedBase<CompilerInvocation>(),
46    LangOpts(new LangOptions(*X.getLangOpts())),
47    TargetOpts(new TargetOptions(X.getTargetOpts())),
48    DiagnosticOpts(new DiagnosticOptions(X.getDiagnosticOpts())),
49    HeaderSearchOpts(new HeaderSearchOptions(X.getHeaderSearchOpts())),
50    PreprocessorOpts(new PreprocessorOptions(X.getPreprocessorOpts())) {}
51
52//===----------------------------------------------------------------------===//
53// Deserialization (from args)
54//===----------------------------------------------------------------------===//
55
56using namespace clang::driver;
57using namespace clang::driver::options;
58
59//
60
61static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
62                                     DiagnosticsEngine &Diags) {
63  unsigned DefaultOpt = 0;
64  if (IK == IK_OpenCL && !Args.hasArg(OPT_cl_opt_disable))
65    DefaultOpt = 2;
66
67  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
68    if (A->getOption().matches(options::OPT_O0))
69      return 0;
70
71    assert (A->getOption().matches(options::OPT_O));
72
73    StringRef S(A->getValue());
74    if (S == "s" || S == "z" || S.empty())
75      return 2;
76
77    return Args.getLastArgIntValue(OPT_O, DefaultOpt, Diags);
78  }
79
80  return DefaultOpt;
81}
82
83static unsigned getOptimizationLevelSize(ArgList &Args, InputKind IK,
84                                         DiagnosticsEngine &Diags) {
85  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
86    if (A->getOption().matches(options::OPT_O)) {
87      switch (A->getValue()[0]) {
88      default:
89        return 0;
90      case 's':
91        return 1;
92      case 'z':
93        return 2;
94      }
95    }
96  }
97  return 0;
98}
99
100static void addWarningArgs(ArgList &Args, std::vector<std::string> &Warnings) {
101  for (arg_iterator I = Args.filtered_begin(OPT_W_Group),
102         E = Args.filtered_end(); I != E; ++I) {
103    Arg *A = *I;
104    // If the argument is a pure flag, add its name (minus the "W" at the beginning)
105    // to the warning list. Else, add its value (for the OPT_W case).
106    if (A->getOption().getKind() == Option::FlagClass) {
107      Warnings.push_back(A->getOption().getName().substr(1));
108    } else {
109      for (unsigned Idx = 0, End = A->getNumValues();
110           Idx < End; ++Idx) {
111        StringRef V = A->getValue(Idx);
112        // "-Wl," and such are not warning options.
113        // FIXME: Should be handled by putting these in separate flags.
114        if (V.startswith("l,") || V.startswith("a,") || V.startswith("p,"))
115          continue;
116
117        Warnings.push_back(V);
118      }
119    }
120  }
121}
122
123static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
124                              DiagnosticsEngine &Diags) {
125  using namespace options;
126  bool Success = true;
127  if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
128    StringRef Name = A->getValue();
129    AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
130#define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
131      .Case(CMDFLAG, NAME##Model)
132#include "clang/StaticAnalyzer/Core/Analyses.def"
133      .Default(NumStores);
134    if (Value == NumStores) {
135      Diags.Report(diag::err_drv_invalid_value)
136        << A->getAsString(Args) << Name;
137      Success = false;
138    } else {
139      Opts.AnalysisStoreOpt = Value;
140    }
141  }
142
143  if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
144    StringRef Name = A->getValue();
145    AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
146#define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
147      .Case(CMDFLAG, NAME##Model)
148#include "clang/StaticAnalyzer/Core/Analyses.def"
149      .Default(NumConstraints);
150    if (Value == NumConstraints) {
151      Diags.Report(diag::err_drv_invalid_value)
152        << A->getAsString(Args) << Name;
153      Success = false;
154    } else {
155      Opts.AnalysisConstraintsOpt = Value;
156    }
157  }
158
159  if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
160    StringRef Name = A->getValue();
161    AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
162#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
163      .Case(CMDFLAG, PD_##NAME)
164#include "clang/StaticAnalyzer/Core/Analyses.def"
165      .Default(NUM_ANALYSIS_DIAG_CLIENTS);
166    if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
167      Diags.Report(diag::err_drv_invalid_value)
168        << A->getAsString(Args) << Name;
169      Success = false;
170    } else {
171      Opts.AnalysisDiagOpt = Value;
172    }
173  }
174
175  if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
176    StringRef Name = A->getValue();
177    AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
178#define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
179      .Case(CMDFLAG, NAME)
180#include "clang/StaticAnalyzer/Core/Analyses.def"
181      .Default(NumPurgeModes);
182    if (Value == NumPurgeModes) {
183      Diags.Report(diag::err_drv_invalid_value)
184        << A->getAsString(Args) << Name;
185      Success = false;
186    } else {
187      Opts.AnalysisPurgeOpt = Value;
188    }
189  }
190
191  if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
192    StringRef Name = A->getValue();
193    AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
194#define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
195      .Case(CMDFLAG, NAME)
196#include "clang/StaticAnalyzer/Core/Analyses.def"
197      .Default(NumInliningModes);
198    if (Value == NumInliningModes) {
199      Diags.Report(diag::err_drv_invalid_value)
200        << A->getAsString(Args) << Name;
201      Success = false;
202    } else {
203      Opts.InliningMode = Value;
204    }
205  }
206
207  Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
208  Opts.visualizeExplodedGraphWithGraphViz =
209    Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
210  Opts.visualizeExplodedGraphWithUbiGraph =
211    Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
212  Opts.NoRetryExhausted = Args.hasArg(OPT_analyzer_disable_retry_exhausted);
213  Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
214  Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
215  Opts.AnalyzeNestedBlocks =
216    Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
217  Opts.eagerlyAssumeBinOpBifurcation = Args.hasArg(OPT_analyzer_eagerly_assume);
218  Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
219  Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
220  Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
221  Opts.maxBlockVisitOnPath = Args.getLastArgIntValue(OPT_analyzer_max_loop, 4, Diags);
222  Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
223  Opts.InlineMaxStackDepth =
224    Args.getLastArgIntValue(OPT_analyzer_inline_max_stack_depth,
225                            Opts.InlineMaxStackDepth, Diags);
226
227  Opts.CheckersControlList.clear();
228  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_checker,
229                                             OPT_analyzer_disable_checker),
230         ie = Args.filtered_end(); it != ie; ++it) {
231    const Arg *A = *it;
232    A->claim();
233    bool enable = (A->getOption().getID() == OPT_analyzer_checker);
234    // We can have a list of comma separated checker names, e.g:
235    // '-analyzer-checker=cocoa,unix'
236    StringRef checkerList = A->getValue();
237    SmallVector<StringRef, 4> checkers;
238    checkerList.split(checkers, ",");
239    for (unsigned i = 0, e = checkers.size(); i != e; ++i)
240      Opts.CheckersControlList.push_back(std::make_pair(checkers[i], enable));
241  }
242
243  // Go through the analyzer configuration options.
244  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_config),
245       ie = Args.filtered_end(); it != ie; ++it) {
246    const Arg *A = *it;
247    A->claim();
248    // We can have a list of comma separated config names, e.g:
249    // '-analyzer-config key1=val1,key2=val2'
250    StringRef configList = A->getValue();
251    SmallVector<StringRef, 4> configVals;
252    configList.split(configVals, ",");
253    for (unsigned i = 0, e = configVals.size(); i != e; ++i) {
254      StringRef key, val;
255      llvm::tie(key, val) = configVals[i].split("=");
256      if (val.empty()) {
257        Diags.Report(SourceLocation(),
258                     diag::err_analyzer_config_no_value) << configVals[i];
259        Success = false;
260        break;
261      }
262      if (val.find('=') != StringRef::npos) {
263        Diags.Report(SourceLocation(),
264                     diag::err_analyzer_config_multiple_values)
265          << configVals[i];
266        Success = false;
267        break;
268      }
269      Opts.Config[key] = val;
270    }
271  }
272
273  return Success;
274}
275
276static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
277  Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
278  Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
279  return true;
280}
281
282static void ParseCommentArgs(CommentOptions &Opts, ArgList &Args) {
283  Opts.BlockCommandNames = Args.getAllArgValues(OPT_fcomment_block_commands);
284}
285
286static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
287                             DiagnosticsEngine &Diags) {
288  using namespace options;
289  bool Success = true;
290
291  unsigned OptLevel = getOptimizationLevel(Args, IK, Diags);
292  if (OptLevel > 3) {
293    Diags.Report(diag::err_drv_invalid_value)
294      << Args.getLastArg(OPT_O)->getAsString(Args) << OptLevel;
295    OptLevel = 3;
296    Success = false;
297  }
298  Opts.OptimizationLevel = OptLevel;
299
300  // We must always run at least the always inlining pass.
301  Opts.setInlining(
302    (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
303                                 : CodeGenOptions::OnlyAlwaysInlining);
304  // -fno-inline-functions overrides OptimizationLevel > 1.
305  Opts.NoInline = Args.hasArg(OPT_fno_inline);
306  Opts.setInlining(Args.hasArg(OPT_fno_inline_functions) ?
307                     CodeGenOptions::OnlyAlwaysInlining : Opts.getInlining());
308
309  if (Args.hasArg(OPT_gline_tables_only)) {
310    Opts.setDebugInfo(CodeGenOptions::DebugLineTablesOnly);
311  } else if (Args.hasArg(OPT_g_Flag)) {
312    if (Args.hasFlag(OPT_flimit_debug_info, OPT_fno_limit_debug_info, true))
313      Opts.setDebugInfo(CodeGenOptions::LimitedDebugInfo);
314    else
315      Opts.setDebugInfo(CodeGenOptions::FullDebugInfo);
316  }
317  Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
318  Opts.SplitDwarfFile = Args.getLastArgValue(OPT_split_dwarf_file);
319
320  Opts.ModulesAutolink = Args.hasArg(OPT_fmodules_autolink);
321  Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
322  Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
323  Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
324  Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
325    OPT_fuse_register_sized_bitfield_access);
326  Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
327  Opts.StructPathTBAA = Args.hasArg(OPT_struct_path_tbaa);
328  Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
329  Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
330  Opts.NoCommon = Args.hasArg(OPT_fno_common);
331  Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
332  Opts.OptimizeSize = getOptimizationLevelSize(Args, IK, Diags);
333  Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
334                            Args.hasArg(OPT_ffreestanding));
335  Opts.UnrollLoops = Args.hasArg(OPT_funroll_loops) ||
336                     (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
337
338  Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
339  Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
340  Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);
341  Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
342  Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
343  Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
344  Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
345  Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
346  Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
347  Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
348  Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
349  Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
350  Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
351  Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
352                       Args.hasArg(OPT_cl_finite_math_only)||
353                       Args.hasArg(OPT_cl_fast_relaxed_math));
354  Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
355                       Args.hasArg(OPT_cl_finite_math_only)||
356                       Args.hasArg(OPT_cl_fast_relaxed_math));
357  Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
358  Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
359  Opts.NumRegisterParameters = Args.getLastArgIntValue(OPT_mregparm, 0, Diags);
360  Opts.NoGlobalMerge = Args.hasArg(OPT_mno_global_merge);
361  Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
362  Opts.EnableSegmentedStacks = Args.hasArg(OPT_split_stacks);
363  Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
364  Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
365  Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
366  Opts.NoDwarf2CFIAsm = Args.hasArg(OPT_fno_dwarf2_cfi_asm);
367  Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
368  Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
369  Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
370  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
371                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
372                      Args.hasArg(OPT_cl_fast_relaxed_math);
373  Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
374  Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
375  Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
376  Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
377
378  Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
379  Opts.DataSections = Args.hasArg(OPT_fdata_sections);
380
381  Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
382  Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
383  Opts.SanitizeRecover = !Args.hasArg(OPT_fno_sanitize_recover);
384
385  Opts.DisableGCov = Args.hasArg(OPT_test_coverage);
386  Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
387  Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
388  if (Opts.EmitGcovArcs || Opts.EmitGcovNotes) {
389  Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
390    Opts.CoverageExtraChecksum = Args.hasArg(OPT_coverage_cfg_checksum);
391    Opts.CoverageNoFunctionNamesInData =
392        Args.hasArg(OPT_coverage_no_function_names_in_data);
393    if (Args.hasArg(OPT_coverage_version_EQ)) {
394      StringRef CoverageVersion = Args.getLastArgValue(OPT_coverage_version_EQ);
395      if (CoverageVersion.size() != 4) {
396        Diags.Report(diag::err_drv_invalid_value)
397            << Args.getLastArg(OPT_coverage_version_EQ)->getAsString(Args)
398            << CoverageVersion;
399      } else {
400        memcpy(Opts.CoverageVersion, CoverageVersion.data(), 4);
401      }
402    }
403  }
404
405  Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
406  Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
407  Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
408  Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
409  Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
410  Opts.SanitizerBlacklistFile = Args.getLastArgValue(OPT_fsanitize_blacklist);
411  Opts.SanitizeMemoryTrackOrigins =
412    Args.hasArg(OPT_fsanitize_memory_track_origins);
413  Opts.SanitizeAddressZeroBaseShadow =
414    Args.hasArg(OPT_fsanitize_address_zero_base_shadow);
415  Opts.SanitizeUndefinedTrapOnError =
416    Args.hasArg(OPT_fsanitize_undefined_trap_on_error);
417  Opts.SSPBufferSize =
418    Args.getLastArgIntValue(OPT_stack_protector_buffer_size, 8, Diags);
419  Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
420  if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
421    StringRef Val = A->getValue();
422    unsigned StackAlignment = Opts.StackAlignment;
423    Val.getAsInteger(10, StackAlignment);
424    Opts.StackAlignment = StackAlignment;
425  }
426
427  if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
428    StringRef Name = A->getValue();
429    unsigned Method = llvm::StringSwitch<unsigned>(Name)
430      .Case("legacy", CodeGenOptions::Legacy)
431      .Case("non-legacy", CodeGenOptions::NonLegacy)
432      .Case("mixed", CodeGenOptions::Mixed)
433      .Default(~0U);
434    if (Method == ~0U) {
435      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
436      Success = false;
437    } else {
438      Opts.setObjCDispatchMethod(
439        static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
440    }
441  }
442
443  if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
444    StringRef Name = A->getValue();
445    unsigned Model = llvm::StringSwitch<unsigned>(Name)
446        .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
447        .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
448        .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
449        .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
450        .Default(~0U);
451    if (Model == ~0U) {
452      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
453      Success = false;
454    } else {
455      Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
456    }
457  }
458
459  if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
460    StringRef Val = A->getValue();
461    if (Val == "fast")
462      Opts.setFPContractMode(CodeGenOptions::FPC_Fast);
463    else if (Val == "on")
464      Opts.setFPContractMode(CodeGenOptions::FPC_On);
465    else if (Val == "off")
466      Opts.setFPContractMode(CodeGenOptions::FPC_Off);
467    else
468      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
469  }
470
471  return Success;
472}
473
474static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
475                                      ArgList &Args) {
476  using namespace options;
477  Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
478  Opts.Targets = Args.getAllArgValues(OPT_MT);
479  Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
480  Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
481  Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
482  Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
483  Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
484  Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
485}
486
487bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
488                                DiagnosticsEngine *Diags) {
489  using namespace options;
490  bool Success = true;
491
492  Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
493  Opts.DiagnosticSerializationFile =
494    Args.getLastArgValue(OPT_diagnostic_serialized_file);
495  Opts.IgnoreWarnings = Args.hasArg(OPT_w);
496  Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
497  Opts.Pedantic = Args.hasArg(OPT_pedantic);
498  Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
499  Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
500  Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
501  Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
502                                 OPT_fno_show_column,
503                                 /*Default=*/true);
504  Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
505  Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
506  Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
507
508  // Default behavior is to not to show note include stacks.
509  Opts.ShowNoteIncludeStack = false;
510  if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
511                               OPT_fno_diagnostics_show_note_include_stack))
512    if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
513      Opts.ShowNoteIncludeStack = true;
514
515  StringRef ShowOverloads =
516    Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
517  if (ShowOverloads == "best")
518    Opts.setShowOverloads(Ovl_Best);
519  else if (ShowOverloads == "all")
520    Opts.setShowOverloads(Ovl_All);
521  else {
522    Success = false;
523    if (Diags)
524      Diags->Report(diag::err_drv_invalid_value)
525      << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
526      << ShowOverloads;
527  }
528
529  StringRef ShowCategory =
530    Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
531  if (ShowCategory == "none")
532    Opts.ShowCategories = 0;
533  else if (ShowCategory == "id")
534    Opts.ShowCategories = 1;
535  else if (ShowCategory == "name")
536    Opts.ShowCategories = 2;
537  else {
538    Success = false;
539    if (Diags)
540      Diags->Report(diag::err_drv_invalid_value)
541      << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
542      << ShowCategory;
543  }
544
545  StringRef Format =
546    Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
547  if (Format == "clang")
548    Opts.setFormat(DiagnosticOptions::Clang);
549  else if (Format == "msvc")
550    Opts.setFormat(DiagnosticOptions::Msvc);
551  else if (Format == "vi")
552    Opts.setFormat(DiagnosticOptions::Vi);
553  else {
554    Success = false;
555    if (Diags)
556      Diags->Report(diag::err_drv_invalid_value)
557      << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
558      << Format;
559  }
560
561  Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
562  Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
563  Opts.ShowPresumedLoc = !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
564  Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
565  Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
566  Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
567  Opts.WarnOnSpellCheck = Args.hasArg(OPT_fwarn_on_spellcheck);
568  Opts.ErrorLimit = Args.getLastArgIntValue(OPT_ferror_limit, 0, Diags);
569  Opts.MacroBacktraceLimit
570    = Args.getLastArgIntValue(OPT_fmacro_backtrace_limit,
571                         DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
572  Opts.TemplateBacktraceLimit
573    = Args.getLastArgIntValue(OPT_ftemplate_backtrace_limit,
574                         DiagnosticOptions::DefaultTemplateBacktraceLimit,
575                         Diags);
576  Opts.ConstexprBacktraceLimit
577    = Args.getLastArgIntValue(OPT_fconstexpr_backtrace_limit,
578                         DiagnosticOptions::DefaultConstexprBacktraceLimit,
579                         Diags);
580  Opts.TabStop = Args.getLastArgIntValue(OPT_ftabstop,
581                                    DiagnosticOptions::DefaultTabStop, Diags);
582  if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
583    Opts.TabStop = DiagnosticOptions::DefaultTabStop;
584    if (Diags)
585      Diags->Report(diag::warn_ignoring_ftabstop_value)
586      << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
587  }
588  Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
589  addWarningArgs(Args, Opts.Warnings);
590
591  return Success;
592}
593
594static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
595  Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
596}
597
598static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
599                                   DiagnosticsEngine &Diags) {
600  using namespace options;
601  Opts.ProgramAction = frontend::ParseSyntaxOnly;
602  if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
603    switch (A->getOption().getID()) {
604    default:
605      llvm_unreachable("Invalid option in group!");
606    case OPT_ast_list:
607      Opts.ProgramAction = frontend::ASTDeclList; break;
608    case OPT_ast_dump:
609      Opts.ProgramAction = frontend::ASTDump; break;
610    case OPT_ast_dump_xml:
611      Opts.ProgramAction = frontend::ASTDumpXML; break;
612    case OPT_ast_print:
613      Opts.ProgramAction = frontend::ASTPrint; break;
614    case OPT_ast_view:
615      Opts.ProgramAction = frontend::ASTView; break;
616    case OPT_dump_raw_tokens:
617      Opts.ProgramAction = frontend::DumpRawTokens; break;
618    case OPT_dump_tokens:
619      Opts.ProgramAction = frontend::DumpTokens; break;
620    case OPT_S:
621      Opts.ProgramAction = frontend::EmitAssembly; break;
622    case OPT_emit_llvm_bc:
623      Opts.ProgramAction = frontend::EmitBC; break;
624    case OPT_emit_html:
625      Opts.ProgramAction = frontend::EmitHTML; break;
626    case OPT_emit_llvm:
627      Opts.ProgramAction = frontend::EmitLLVM; break;
628    case OPT_emit_llvm_only:
629      Opts.ProgramAction = frontend::EmitLLVMOnly; break;
630    case OPT_emit_codegen_only:
631      Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
632    case OPT_emit_obj:
633      Opts.ProgramAction = frontend::EmitObj; break;
634    case OPT_fixit_EQ:
635      Opts.FixItSuffix = A->getValue();
636      // fall-through!
637    case OPT_fixit:
638      Opts.ProgramAction = frontend::FixIt; break;
639    case OPT_emit_module:
640      Opts.ProgramAction = frontend::GenerateModule; break;
641    case OPT_emit_pch:
642      Opts.ProgramAction = frontend::GeneratePCH; break;
643    case OPT_emit_pth:
644      Opts.ProgramAction = frontend::GeneratePTH; break;
645    case OPT_init_only:
646      Opts.ProgramAction = frontend::InitOnly; break;
647    case OPT_fsyntax_only:
648      Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
649    case OPT_module_file_info:
650      Opts.ProgramAction = frontend::ModuleFileInfo; break;
651    case OPT_print_decl_contexts:
652      Opts.ProgramAction = frontend::PrintDeclContext; break;
653    case OPT_print_preamble:
654      Opts.ProgramAction = frontend::PrintPreamble; break;
655    case OPT_E:
656      Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
657    case OPT_rewrite_macros:
658      Opts.ProgramAction = frontend::RewriteMacros; break;
659    case OPT_rewrite_objc:
660      Opts.ProgramAction = frontend::RewriteObjC; break;
661    case OPT_rewrite_test:
662      Opts.ProgramAction = frontend::RewriteTest; break;
663    case OPT_analyze:
664      Opts.ProgramAction = frontend::RunAnalysis; break;
665    case OPT_migrate:
666      Opts.ProgramAction = frontend::MigrateSource; break;
667    case OPT_Eonly:
668      Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
669    }
670  }
671
672  if (const Arg* A = Args.getLastArg(OPT_plugin)) {
673    Opts.Plugins.push_back(A->getValue(0));
674    Opts.ProgramAction = frontend::PluginAction;
675    Opts.ActionName = A->getValue();
676
677    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
678           end = Args.filtered_end(); it != end; ++it) {
679      if ((*it)->getValue(0) == Opts.ActionName)
680        Opts.PluginArgs.push_back((*it)->getValue(1));
681    }
682  }
683
684  Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
685  Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
686  for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
687    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
688           end = Args.filtered_end(); it != end; ++it) {
689      if ((*it)->getValue(0) == Opts.AddPluginActions[i])
690        Opts.AddPluginArgs[i].push_back((*it)->getValue(1));
691    }
692  }
693
694  if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
695    Opts.CodeCompletionAt =
696      ParsedSourceLocation::FromString(A->getValue());
697    if (Opts.CodeCompletionAt.FileName.empty())
698      Diags.Report(diag::err_drv_invalid_value)
699        << A->getAsString(Args) << A->getValue();
700  }
701  Opts.DisableFree = Args.hasArg(OPT_disable_free);
702
703  Opts.OutputFile = Args.getLastArgValue(OPT_o);
704  Opts.Plugins = Args.getAllArgValues(OPT_load);
705  Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
706  Opts.ShowHelp = Args.hasArg(OPT_help);
707  Opts.ShowStats = Args.hasArg(OPT_print_stats);
708  Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
709  Opts.ShowVersion = Args.hasArg(OPT_version);
710  Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
711  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
712  Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
713  Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
714  Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
715  Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
716  Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
717  Opts.UseGlobalModuleIndex = !Args.hasArg(OPT_fno_modules_global_index);
718  Opts.GenerateGlobalModuleIndex = Opts.UseGlobalModuleIndex;
719
720  Opts.CodeCompleteOpts.IncludeMacros
721    = Args.hasArg(OPT_code_completion_macros);
722  Opts.CodeCompleteOpts.IncludeCodePatterns
723    = Args.hasArg(OPT_code_completion_patterns);
724  Opts.CodeCompleteOpts.IncludeGlobals
725    = !Args.hasArg(OPT_no_code_completion_globals);
726  Opts.CodeCompleteOpts.IncludeBriefComments
727    = Args.hasArg(OPT_code_completion_brief_comments);
728
729  Opts.OverrideRecordLayoutsFile
730    = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
731  if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
732                                     OPT_arcmt_modify,
733                                     OPT_arcmt_migrate)) {
734    switch (A->getOption().getID()) {
735    default:
736      llvm_unreachable("missed a case");
737    case OPT_arcmt_check:
738      Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
739      break;
740    case OPT_arcmt_modify:
741      Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
742      break;
743    case OPT_arcmt_migrate:
744      Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
745      break;
746    }
747  }
748  Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
749  Opts.ARCMTMigrateReportOut
750    = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
751  Opts.ARCMTMigrateEmitARCErrors
752    = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
753
754  if (Args.hasArg(OPT_objcmt_migrate_literals))
755    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
756  if (Args.hasArg(OPT_objcmt_migrate_subscripting))
757    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
758
759  if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
760      Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
761    Diags.Report(diag::err_drv_argument_not_allowed_with)
762      << "ARC migration" << "ObjC migration";
763  }
764
765  InputKind DashX = IK_None;
766  if (const Arg *A = Args.getLastArg(OPT_x)) {
767    DashX = llvm::StringSwitch<InputKind>(A->getValue())
768      .Case("c", IK_C)
769      .Case("cl", IK_OpenCL)
770      .Case("cuda", IK_CUDA)
771      .Case("c++", IK_CXX)
772      .Case("objective-c", IK_ObjC)
773      .Case("objective-c++", IK_ObjCXX)
774      .Case("cpp-output", IK_PreprocessedC)
775      .Case("assembler-with-cpp", IK_Asm)
776      .Case("c++-cpp-output", IK_PreprocessedCXX)
777      .Case("objective-c-cpp-output", IK_PreprocessedObjC)
778      .Case("objc-cpp-output", IK_PreprocessedObjC)
779      .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
780      .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
781      .Case("c-header", IK_C)
782      .Case("cl-header", IK_OpenCL)
783      .Case("objective-c-header", IK_ObjC)
784      .Case("c++-header", IK_CXX)
785      .Case("objective-c++-header", IK_ObjCXX)
786      .Cases("ast", "pcm", IK_AST)
787      .Case("ir", IK_LLVM_IR)
788      .Default(IK_None);
789    if (DashX == IK_None)
790      Diags.Report(diag::err_drv_invalid_value)
791        << A->getAsString(Args) << A->getValue();
792  }
793
794  // '-' is the default input if none is given.
795  std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
796  Opts.Inputs.clear();
797  if (Inputs.empty())
798    Inputs.push_back("-");
799  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
800    InputKind IK = DashX;
801    if (IK == IK_None) {
802      IK = FrontendOptions::getInputKindForExtension(
803        StringRef(Inputs[i]).rsplit('.').second);
804      // FIXME: Remove this hack.
805      if (i == 0)
806        DashX = IK;
807    }
808    Opts.Inputs.push_back(FrontendInputFile(Inputs[i], IK));
809  }
810
811  return DashX;
812}
813
814std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
815                                                 void *MainAddr) {
816  llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
817
818  if (!P.isEmpty()) {
819    P.eraseComponent();  // Remove /clang from foo/bin/clang
820    P.eraseComponent();  // Remove /bin   from foo/bin
821
822    // Get foo/lib/clang/<version>/include
823    P.appendComponent("lib");
824    P.appendComponent("clang");
825    P.appendComponent(CLANG_VERSION_STRING);
826  }
827
828  return P.str();
829}
830
831static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
832  using namespace options;
833  Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
834  Opts.Verbose = Args.hasArg(OPT_v);
835  Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
836  Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
837  Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
838  if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
839    Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
840  Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
841  Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodules_cache_path);
842  Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
843  Opts.ModuleCachePruneInterval
844    = Args.getLastArgIntValue(OPT_fmodules_prune_interval, 7*24*60*60);
845  Opts.ModuleCachePruneAfter
846    = Args.getLastArgIntValue(OPT_fmodules_prune_after, 31*24*60*60);
847  for (arg_iterator it = Args.filtered_begin(OPT_fmodules_ignore_macro),
848       ie = Args.filtered_end(); it != ie; ++it) {
849    StringRef MacroDef = (*it)->getValue();
850    Opts.ModulesIgnoreMacros.insert(MacroDef.split('=').first);
851  }
852
853  // Add -I..., -F..., and -index-header-map options in order.
854  bool IsIndexHeaderMap = false;
855  for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F,
856                                             OPT_index_header_map),
857       ie = Args.filtered_end(); it != ie; ++it) {
858    if ((*it)->getOption().matches(OPT_index_header_map)) {
859      // -index-header-map applies to the next -I or -F.
860      IsIndexHeaderMap = true;
861      continue;
862    }
863
864    frontend::IncludeDirGroup Group
865      = IsIndexHeaderMap? frontend::IndexHeaderMap : frontend::Angled;
866
867    Opts.AddPath((*it)->getValue(), Group,
868                 /*IsFramework=*/ (*it)->getOption().matches(OPT_F), true);
869    IsIndexHeaderMap = false;
870  }
871
872  // Add -iprefix/-iwithprefix/-iwithprefixbefore options.
873  StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
874  for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
875                                             OPT_iwithprefixbefore),
876         ie = Args.filtered_end(); it != ie; ++it) {
877    const Arg *A = *it;
878    if (A->getOption().matches(OPT_iprefix))
879      Prefix = A->getValue();
880    else if (A->getOption().matches(OPT_iwithprefix))
881      Opts.AddPath(Prefix.str() + A->getValue(),
882                   frontend::After, false, true);
883    else
884      Opts.AddPath(Prefix.str() + A->getValue(),
885                   frontend::Angled, false, true);
886  }
887
888  for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
889         ie = Args.filtered_end(); it != ie; ++it)
890    Opts.AddPath((*it)->getValue(), frontend::After, false, true);
891  for (arg_iterator it = Args.filtered_begin(OPT_iquote),
892         ie = Args.filtered_end(); it != ie; ++it)
893    Opts.AddPath((*it)->getValue(), frontend::Quoted, false, true);
894  for (arg_iterator it = Args.filtered_begin(OPT_isystem,
895         OPT_iwithsysroot), ie = Args.filtered_end(); it != ie; ++it)
896    Opts.AddPath((*it)->getValue(), frontend::System, false,
897                 !(*it)->getOption().matches(OPT_iwithsysroot));
898  for (arg_iterator it = Args.filtered_begin(OPT_iframework),
899         ie = Args.filtered_end(); it != ie; ++it)
900    Opts.AddPath((*it)->getValue(), frontend::System, true, true);
901
902  // Add the paths for the various language specific isystem flags.
903  for (arg_iterator it = Args.filtered_begin(OPT_c_isystem),
904       ie = Args.filtered_end(); it != ie; ++it)
905    Opts.AddPath((*it)->getValue(), frontend::CSystem, false, true);
906  for (arg_iterator it = Args.filtered_begin(OPT_cxx_isystem),
907       ie = Args.filtered_end(); it != ie; ++it)
908    Opts.AddPath((*it)->getValue(), frontend::CXXSystem, false, true);
909  for (arg_iterator it = Args.filtered_begin(OPT_objc_isystem),
910       ie = Args.filtered_end(); it != ie; ++it)
911    Opts.AddPath((*it)->getValue(), frontend::ObjCSystem, false,true);
912  for (arg_iterator it = Args.filtered_begin(OPT_objcxx_isystem),
913       ie = Args.filtered_end(); it != ie; ++it)
914    Opts.AddPath((*it)->getValue(), frontend::ObjCXXSystem, false, true);
915
916  // Add the internal paths from a driver that detects standard include paths.
917  for (arg_iterator I = Args.filtered_begin(OPT_internal_isystem,
918                                            OPT_internal_externc_isystem),
919                    E = Args.filtered_end();
920       I != E; ++I) {
921    frontend::IncludeDirGroup Group = frontend::System;
922    if ((*I)->getOption().matches(OPT_internal_externc_isystem))
923      Group = frontend::ExternCSystem;
924    Opts.AddPath((*I)->getValue(), Group, false, true);
925  }
926
927  // Add the path prefixes which are implicitly treated as being system headers.
928  for (arg_iterator I = Args.filtered_begin(OPT_isystem_prefix,
929                                            OPT_ino_system_prefix),
930                    E = Args.filtered_end();
931       I != E; ++I)
932    Opts.AddSystemHeaderPrefix((*I)->getValue(),
933                               (*I)->getOption().matches(OPT_isystem_prefix));
934}
935
936void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
937                                         LangStandard::Kind LangStd) {
938  // Set some properties which depend solely on the input kind; it would be nice
939  // to move these to the language standard, and have the driver resolve the
940  // input kind + language standard.
941  if (IK == IK_Asm) {
942    Opts.AsmPreprocessor = 1;
943  } else if (IK == IK_ObjC ||
944             IK == IK_ObjCXX ||
945             IK == IK_PreprocessedObjC ||
946             IK == IK_PreprocessedObjCXX) {
947    Opts.ObjC1 = Opts.ObjC2 = 1;
948  }
949
950  if (LangStd == LangStandard::lang_unspecified) {
951    // Based on the base language, pick one.
952    switch (IK) {
953    case IK_None:
954    case IK_AST:
955    case IK_LLVM_IR:
956      llvm_unreachable("Invalid input kind!");
957    case IK_OpenCL:
958      LangStd = LangStandard::lang_opencl;
959      break;
960    case IK_CUDA:
961      LangStd = LangStandard::lang_cuda;
962      break;
963    case IK_Asm:
964    case IK_C:
965    case IK_PreprocessedC:
966    case IK_ObjC:
967    case IK_PreprocessedObjC:
968      LangStd = LangStandard::lang_gnu99;
969      break;
970    case IK_CXX:
971    case IK_PreprocessedCXX:
972    case IK_ObjCXX:
973    case IK_PreprocessedObjCXX:
974      LangStd = LangStandard::lang_gnucxx98;
975      break;
976    }
977  }
978
979  const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
980  Opts.LineComment = Std.hasLineComments();
981  Opts.C99 = Std.isC99();
982  Opts.C11 = Std.isC11();
983  Opts.CPlusPlus = Std.isCPlusPlus();
984  Opts.CPlusPlus11 = Std.isCPlusPlus11();
985  Opts.CPlusPlus1y = Std.isCPlusPlus1y();
986  Opts.Digraphs = Std.hasDigraphs();
987  Opts.GNUMode = Std.isGNUMode();
988  Opts.GNUInline = !Std.isC99();
989  Opts.HexFloats = Std.hasHexFloats();
990  Opts.ImplicitInt = Std.hasImplicitInt();
991
992  // Set OpenCL Version.
993  if (LangStd == LangStandard::lang_opencl) {
994    Opts.OpenCL = 1;
995    Opts.OpenCLVersion = 100;
996  }
997  else if (LangStd == LangStandard::lang_opencl11) {
998      Opts.OpenCL = 1;
999      Opts.OpenCLVersion = 110;
1000  }
1001  else if (LangStd == LangStandard::lang_opencl12) {
1002    Opts.OpenCL = 1;
1003    Opts.OpenCLVersion = 120;
1004  }
1005
1006  // OpenCL has some additional defaults.
1007  if (Opts.OpenCL) {
1008    Opts.AltiVec = 0;
1009    Opts.CXXOperatorNames = 1;
1010    Opts.LaxVectorConversions = 0;
1011    Opts.DefaultFPContract = 1;
1012    Opts.NativeHalfType = 1;
1013  }
1014
1015  if (LangStd == LangStandard::lang_cuda)
1016    Opts.CUDA = 1;
1017
1018  // OpenCL and C++ both have bool, true, false keywords.
1019  Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1020
1021  // C++ has wchar_t keyword.
1022  Opts.WChar = Opts.CPlusPlus;
1023
1024  Opts.GNUKeywords = Opts.GNUMode;
1025  Opts.CXXOperatorNames = Opts.CPlusPlus;
1026
1027  // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1028  // is specified, or -std is set to a conforming mode.
1029  Opts.Trigraphs = !Opts.GNUMode;
1030
1031  Opts.DollarIdents = !Opts.AsmPreprocessor;
1032}
1033
1034/// Attempt to parse a visibility value out of the given argument.
1035static Visibility parseVisibility(Arg *arg, ArgList &args,
1036                                  DiagnosticsEngine &diags) {
1037  StringRef value = arg->getValue();
1038  if (value == "default") {
1039    return DefaultVisibility;
1040  } else if (value == "hidden") {
1041    return HiddenVisibility;
1042  } else if (value == "protected") {
1043    // FIXME: diagnose if target does not support protected visibility
1044    return ProtectedVisibility;
1045  }
1046
1047  diags.Report(diag::err_drv_invalid_value)
1048    << arg->getAsString(args) << value;
1049  return DefaultVisibility;
1050}
1051
1052static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1053                          DiagnosticsEngine &Diags) {
1054  // FIXME: Cleanup per-file based stuff.
1055  LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1056  if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1057    LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1058#define LANGSTANDARD(id, name, desc, features) \
1059      .Case(name, LangStandard::lang_##id)
1060#include "clang/Frontend/LangStandards.def"
1061      .Default(LangStandard::lang_unspecified);
1062    if (LangStd == LangStandard::lang_unspecified)
1063      Diags.Report(diag::err_drv_invalid_value)
1064        << A->getAsString(Args) << A->getValue();
1065    else {
1066      // Valid standard, check to make sure language and standard are compatable.
1067      const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1068      switch (IK) {
1069      case IK_C:
1070      case IK_ObjC:
1071      case IK_PreprocessedC:
1072      case IK_PreprocessedObjC:
1073        if (!(Std.isC89() || Std.isC99()))
1074          Diags.Report(diag::err_drv_argument_not_allowed_with)
1075            << A->getAsString(Args) << "C/ObjC";
1076        break;
1077      case IK_CXX:
1078      case IK_ObjCXX:
1079      case IK_PreprocessedCXX:
1080      case IK_PreprocessedObjCXX:
1081        if (!Std.isCPlusPlus())
1082          Diags.Report(diag::err_drv_argument_not_allowed_with)
1083            << A->getAsString(Args) << "C++/ObjC++";
1084        break;
1085      case IK_OpenCL:
1086        if (!Std.isC99())
1087          Diags.Report(diag::err_drv_argument_not_allowed_with)
1088            << A->getAsString(Args) << "OpenCL";
1089        break;
1090      case IK_CUDA:
1091        if (!Std.isCPlusPlus())
1092          Diags.Report(diag::err_drv_argument_not_allowed_with)
1093            << A->getAsString(Args) << "CUDA";
1094        break;
1095      default:
1096        break;
1097      }
1098    }
1099  }
1100
1101  // -cl-std only applies for OpenCL language standards.
1102  // Override the -std option in this case.
1103  if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1104    LangStandard::Kind OpenCLLangStd
1105    = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1106    .Case("CL", LangStandard::lang_opencl)
1107    .Case("CL1.1", LangStandard::lang_opencl11)
1108    .Case("CL1.2", LangStandard::lang_opencl12)
1109    .Default(LangStandard::lang_unspecified);
1110
1111    if (OpenCLLangStd == LangStandard::lang_unspecified) {
1112      Diags.Report(diag::err_drv_invalid_value)
1113      << A->getAsString(Args) << A->getValue();
1114    }
1115    else
1116      LangStd = OpenCLLangStd;
1117  }
1118
1119  CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1120
1121  // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1122  // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1123  // while a subset (the non-C++ GNU keywords) is provided by GCC's
1124  // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1125  // name, as it doesn't seem a useful distinction.
1126  Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1127                                  Opts.GNUKeywords);
1128
1129  if (Args.hasArg(OPT_fno_operator_names))
1130    Opts.CXXOperatorNames = 0;
1131
1132  if (Opts.ObjC1) {
1133    if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1134      StringRef value = arg->getValue();
1135      if (Opts.ObjCRuntime.tryParse(value))
1136        Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1137    }
1138
1139    if (Args.hasArg(OPT_fobjc_gc_only))
1140      Opts.setGC(LangOptions::GCOnly);
1141    else if (Args.hasArg(OPT_fobjc_gc))
1142      Opts.setGC(LangOptions::HybridGC);
1143    else if (Args.hasArg(OPT_fobjc_arc)) {
1144      Opts.ObjCAutoRefCount = 1;
1145      if (!Opts.ObjCRuntime.allowsARC())
1146        Diags.Report(diag::err_arc_unsupported_on_runtime);
1147
1148      // Only set ObjCARCWeak if ARC is enabled.
1149      if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1150        Opts.ObjCARCWeak = 1;
1151      else
1152        Opts.ObjCARCWeak = Opts.ObjCRuntime.allowsWeak();
1153    }
1154
1155    if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1156      Opts.ObjCInferRelatedResultType = 0;
1157  }
1158
1159  if (Args.hasArg(OPT_fgnu89_inline))
1160    Opts.GNUInline = 1;
1161
1162  if (Args.hasArg(OPT_fapple_kext)) {
1163    if (!Opts.CPlusPlus)
1164      Diags.Report(diag::warn_c_kext);
1165    else
1166      Opts.AppleKext = 1;
1167  }
1168
1169  if (Args.hasArg(OPT_print_ivar_layout))
1170    Opts.ObjCGCBitmapPrint = 1;
1171  if (Args.hasArg(OPT_fno_constant_cfstrings))
1172    Opts.NoConstantCFStrings = 1;
1173
1174  if (Args.hasArg(OPT_faltivec))
1175    Opts.AltiVec = 1;
1176
1177  if (Args.hasArg(OPT_pthread))
1178    Opts.POSIXThreads = 1;
1179
1180  // The value-visibility mode defaults to "default".
1181  if (Arg *visOpt = Args.getLastArg(OPT_fvisibility)) {
1182    Opts.setValueVisibilityMode(parseVisibility(visOpt, Args, Diags));
1183  } else {
1184    Opts.setValueVisibilityMode(DefaultVisibility);
1185  }
1186
1187  // The type-visibility mode defaults to the value-visibility mode.
1188  if (Arg *typeVisOpt = Args.getLastArg(OPT_ftype_visibility)) {
1189    Opts.setTypeVisibilityMode(parseVisibility(typeVisOpt, Args, Diags));
1190  } else {
1191    Opts.setTypeVisibilityMode(Opts.getValueVisibilityMode());
1192  }
1193
1194  if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1195    Opts.InlineVisibilityHidden = 1;
1196
1197  if (Args.hasArg(OPT_ftrapv)) {
1198    Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1199    // Set the handler, if one is specified.
1200    Opts.OverflowHandler =
1201        Args.getLastArgValue(OPT_ftrapv_handler);
1202  }
1203  else if (Args.hasArg(OPT_fwrapv))
1204    Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1205
1206  if (Args.hasArg(OPT_trigraphs))
1207    Opts.Trigraphs = 1;
1208
1209  Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1210                                   OPT_fno_dollars_in_identifiers,
1211                                   Opts.DollarIdents);
1212  Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1213  Opts.MicrosoftExt
1214    = Args.hasArg(OPT_fms_extensions) || Args.hasArg(OPT_fms_compatibility);
1215  Opts.MicrosoftMode = Args.hasArg(OPT_fms_compatibility);
1216  Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
1217  Opts.MSCVersion = Args.getLastArgIntValue(OPT_fmsc_version, 0, Diags);
1218  Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1219  Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1220  Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
1221                                   Opts.ConstStrings);
1222  if (Args.hasArg(OPT_fno_lax_vector_conversions))
1223    Opts.LaxVectorConversions = 0;
1224  if (Args.hasArg(OPT_fno_threadsafe_statics))
1225    Opts.ThreadsafeStatics = 0;
1226  Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1227  Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
1228  Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
1229  Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1230  Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
1231
1232  Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1233  Opts.Blocks = Args.hasArg(OPT_fblocks);
1234  Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
1235  Opts.Modules = Args.hasArg(OPT_fmodules);
1236  Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1237  Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
1238  Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1239  Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1240  Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1241  Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1242  Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1243  Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1244  Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1245  Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1246  Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1247  Opts.InstantiationDepth = Args.getLastArgIntValue(OPT_ftemplate_depth, 256,
1248                                                    Diags);
1249  Opts.ConstexprCallDepth = Args.getLastArgIntValue(OPT_fconstexpr_depth, 512,
1250                                                    Diags);
1251  Opts.BracketDepth = Args.getLastArgIntValue(OPT_fbracket_depth, 256, Diags);
1252  Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
1253  Opts.NumLargeByValueCopy = Args.getLastArgIntValue(OPT_Wlarge_by_value_copy_EQ,
1254                                                    0, Diags);
1255  Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
1256  Opts.ObjCConstantStringClass =
1257    Args.getLastArgValue(OPT_fconstant_string_class);
1258  Opts.ObjCDefaultSynthProperties =
1259    Args.hasArg(OPT_fobjc_default_synthesize_properties);
1260  Opts.EncodeExtendedBlockSig =
1261    Args.hasArg(OPT_fencode_extended_block_signature);
1262  Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1263  Opts.PackStruct = Args.getLastArgIntValue(OPT_fpack_struct_EQ, 0, Diags);
1264  Opts.PICLevel = Args.getLastArgIntValue(OPT_pic_level, 0, Diags);
1265  Opts.PIELevel = Args.getLastArgIntValue(OPT_pie_level, 0, Diags);
1266  Opts.Static = Args.hasArg(OPT_static_define);
1267  Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
1268  Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
1269                        || Args.hasArg(OPT_fdump_record_layouts);
1270  Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1271  Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1272  Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1273  Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
1274  Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
1275  Opts.MRTD = Args.hasArg(OPT_mrtd);
1276  Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
1277  Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
1278  Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
1279  Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
1280  Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
1281  Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
1282  Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
1283  Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
1284
1285  // Check if -fopenmp is specified.
1286  Opts.OpenMP = Args.hasArg(OPT_fopenmp);
1287
1288  // Record whether the __DEPRECATED define was requested.
1289  Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
1290                                 OPT_fno_deprecated_macro,
1291                                 Opts.Deprecated);
1292
1293  // FIXME: Eliminate this dependency.
1294  unsigned Opt = getOptimizationLevel(Args, IK, Diags),
1295       OptSize = getOptimizationLevelSize(Args, IK, Diags);
1296  Opts.Optimize = Opt != 0;
1297  Opts.OptimizeSize = OptSize != 0;
1298
1299  // This is the __NO_INLINE__ define, which just depends on things like the
1300  // optimization level and -fno-inline, not actually whether the backend has
1301  // inlining enabled.
1302  Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
1303
1304  Opts.FastMath = Args.hasArg(OPT_ffast_math);
1305  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only);
1306
1307  Opts.RetainCommentsFromSystemHeaders =
1308      Args.hasArg(OPT_fretain_comments_from_system_headers);
1309
1310  unsigned SSP = Args.getLastArgIntValue(OPT_stack_protector, 0, Diags);
1311  switch (SSP) {
1312  default:
1313    Diags.Report(diag::err_drv_invalid_value)
1314      << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1315    break;
1316  case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
1317  case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
1318  case 2: Opts.setStackProtector(LangOptions::SSPReq); break;
1319  }
1320
1321  // Parse -fsanitize= arguments.
1322  std::vector<std::string> Sanitizers = Args.getAllArgValues(OPT_fsanitize_EQ);
1323  for (unsigned I = 0, N = Sanitizers.size(); I != N; ++I) {
1324    // Since the Opts.Sanitize* values are bitfields, it's a little tricky to
1325    // efficiently map string values to them. Perform the mapping indirectly:
1326    // convert strings to enumerated values, then switch over the enum to set
1327    // the right bitfield value.
1328    enum Sanitizer {
1329#define SANITIZER(NAME, ID) \
1330      ID,
1331#include "clang/Basic/Sanitizers.def"
1332      Unknown
1333    };
1334    switch (llvm::StringSwitch<unsigned>(Sanitizers[I])
1335#define SANITIZER(NAME, ID) \
1336              .Case(NAME, ID)
1337#include "clang/Basic/Sanitizers.def"
1338              .Default(Unknown)) {
1339#define SANITIZER(NAME, ID) \
1340    case ID: \
1341      Opts.Sanitize.ID = true; \
1342      break;
1343#include "clang/Basic/Sanitizers.def"
1344
1345    case Unknown:
1346      Diags.Report(diag::err_drv_invalid_value)
1347        << "-fsanitize=" << Sanitizers[I];
1348      break;
1349    }
1350  }
1351}
1352
1353static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1354                                  FileManager &FileMgr,
1355                                  DiagnosticsEngine &Diags) {
1356  using namespace options;
1357  Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1358  Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1359  if (const Arg *A = Args.getLastArg(OPT_token_cache))
1360      Opts.TokenCache = A->getValue();
1361  else
1362    Opts.TokenCache = Opts.ImplicitPTHInclude;
1363  Opts.UsePredefines = !Args.hasArg(OPT_undef);
1364  Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1365  Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1366
1367  Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
1368  for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
1369         ie = Args.filtered_end(); it != ie; ++it) {
1370    const Arg *A = *it;
1371    Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
1372  }
1373
1374  if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1375    StringRef Value(A->getValue());
1376    size_t Comma = Value.find(',');
1377    unsigned Bytes = 0;
1378    unsigned EndOfLine = 0;
1379
1380    if (Comma == StringRef::npos ||
1381        Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1382        Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1383      Diags.Report(diag::err_drv_preamble_format);
1384    else {
1385      Opts.PrecompiledPreambleBytes.first = Bytes;
1386      Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1387    }
1388  }
1389
1390  // Add macros from the command line.
1391  for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1392         ie = Args.filtered_end(); it != ie; ++it) {
1393    if ((*it)->getOption().matches(OPT_D))
1394      Opts.addMacroDef((*it)->getValue());
1395    else
1396      Opts.addMacroUndef((*it)->getValue());
1397  }
1398
1399  Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1400
1401  // Add the ordered list of -includes.
1402  for (arg_iterator it = Args.filtered_begin(OPT_include),
1403         ie = Args.filtered_end(); it != ie; ++it) {
1404    const Arg *A = *it;
1405    Opts.Includes.push_back(A->getValue());
1406  }
1407
1408  for (arg_iterator it = Args.filtered_begin(OPT_chain_include),
1409         ie = Args.filtered_end(); it != ie; ++it) {
1410    const Arg *A = *it;
1411    Opts.ChainedIncludes.push_back(A->getValue());
1412  }
1413
1414  // Include 'altivec.h' if -faltivec option present
1415  if (Args.hasArg(OPT_faltivec))
1416    Opts.Includes.push_back("altivec.h");
1417
1418  for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1419         ie = Args.filtered_end(); it != ie; ++it) {
1420    const Arg *A = *it;
1421    std::pair<StringRef,StringRef> Split =
1422      StringRef(A->getValue()).split(';');
1423
1424    if (Split.second.empty()) {
1425      Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1426      continue;
1427    }
1428
1429    Opts.addRemappedFile(Split.first, Split.second);
1430  }
1431
1432  if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
1433    StringRef Name = A->getValue();
1434    unsigned Library = llvm::StringSwitch<unsigned>(Name)
1435      .Case("libc++", ARCXX_libcxx)
1436      .Case("libstdc++", ARCXX_libstdcxx)
1437      .Case("none", ARCXX_nolib)
1438      .Default(~0U);
1439    if (Library == ~0U)
1440      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1441    else
1442      Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
1443  }
1444}
1445
1446static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1447                                        ArgList &Args,
1448                                        frontend::ActionKind Action) {
1449  using namespace options;
1450
1451  switch (Action) {
1452  case frontend::ASTDeclList:
1453  case frontend::ASTDump:
1454  case frontend::ASTDumpXML:
1455  case frontend::ASTPrint:
1456  case frontend::ASTView:
1457  case frontend::EmitAssembly:
1458  case frontend::EmitBC:
1459  case frontend::EmitHTML:
1460  case frontend::EmitLLVM:
1461  case frontend::EmitLLVMOnly:
1462  case frontend::EmitCodeGenOnly:
1463  case frontend::EmitObj:
1464  case frontend::FixIt:
1465  case frontend::GenerateModule:
1466  case frontend::GeneratePCH:
1467  case frontend::GeneratePTH:
1468  case frontend::ParseSyntaxOnly:
1469  case frontend::ModuleFileInfo:
1470  case frontend::PluginAction:
1471  case frontend::PrintDeclContext:
1472  case frontend::RewriteObjC:
1473  case frontend::RewriteTest:
1474  case frontend::RunAnalysis:
1475  case frontend::MigrateSource:
1476    Opts.ShowCPP = 0;
1477    break;
1478
1479  case frontend::DumpRawTokens:
1480  case frontend::DumpTokens:
1481  case frontend::InitOnly:
1482  case frontend::PrintPreamble:
1483  case frontend::PrintPreprocessedInput:
1484  case frontend::RewriteMacros:
1485  case frontend::RunPreprocessorOnly:
1486    Opts.ShowCPP = !Args.hasArg(OPT_dM);
1487    break;
1488  }
1489
1490  Opts.ShowComments = Args.hasArg(OPT_C);
1491  Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1492  Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1493  Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1494  Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
1495}
1496
1497static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1498  using namespace options;
1499  Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1500  Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
1501  Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1502  Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
1503  Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1504  Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1505
1506  // Use the default target triple if unspecified.
1507  if (Opts.Triple.empty())
1508    Opts.Triple = llvm::sys::getDefaultTargetTriple();
1509}
1510
1511//
1512
1513bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1514                                        const char *const *ArgBegin,
1515                                        const char *const *ArgEnd,
1516                                        DiagnosticsEngine &Diags) {
1517  bool Success = true;
1518
1519  // Parse the arguments.
1520  OwningPtr<OptTable> Opts(createDriverOptTable());
1521  unsigned MissingArgIndex, MissingArgCount;
1522  OwningPtr<InputArgList> Args(
1523    Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1524
1525  // Check for missing argument error.
1526  if (MissingArgCount) {
1527    Diags.Report(diag::err_drv_missing_argument)
1528      << Args->getArgString(MissingArgIndex) << MissingArgCount;
1529    Success = false;
1530  }
1531
1532  // Issue errors on unknown arguments.
1533  for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1534         ie = Args->filtered_end(); it != ie; ++it) {
1535    Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
1536    Success = false;
1537  }
1538
1539  // Issue errors on arguments that are not valid for CC1.
1540  for (ArgList::iterator I = Args->begin(), E = Args->end();
1541       I != E; ++I) {
1542    if (!(*I)->getOption().hasFlag(options::CC1Option)) {
1543      Diags.Report(diag::err_drv_unknown_argument) << (*I)->getAsString(*Args);
1544      Success = false;
1545    }
1546  }
1547
1548  Success = ParseAnalyzerArgs(*Res.getAnalyzerOpts(), *Args, Diags) && Success;
1549  Success = ParseMigratorArgs(Res.getMigratorOpts(), *Args) && Success;
1550  ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1551  Success = ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, &Diags)
1552            && Success;
1553  ParseCommentArgs(Res.getLangOpts()->CommentOpts, *Args);
1554  ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
1555  // FIXME: We shouldn't have to pass the DashX option around here
1556  InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1557  Success = ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags)
1558            && Success;
1559  ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1560  if (DashX != IK_AST && DashX != IK_LLVM_IR) {
1561    ParseLangArgs(*Res.getLangOpts(), *Args, DashX, Diags);
1562    if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
1563      Res.getLangOpts()->ObjCExceptions = 1;
1564  }
1565  // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
1566  // PCH file and find the original header name. Remove the need to do that in
1567  // ParsePreprocessorArgs and remove the FileManager
1568  // parameters from the function and the "FileManager.h" #include.
1569  FileManager FileMgr(Res.getFileSystemOpts());
1570  ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
1571  ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args,
1572                              Res.getFrontendOpts().ProgramAction);
1573  ParseTargetArgs(Res.getTargetOpts(), *Args);
1574
1575  return Success;
1576}
1577
1578namespace {
1579
1580  class ModuleSignature {
1581    SmallVector<uint64_t, 16> Data;
1582    unsigned CurBit;
1583    uint64_t CurValue;
1584
1585  public:
1586    ModuleSignature() : CurBit(0), CurValue(0) { }
1587
1588    void add(uint64_t Value, unsigned Bits);
1589    void add(StringRef Value);
1590    void flush();
1591
1592    llvm::APInt getAsInteger() const;
1593  };
1594}
1595
1596void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
1597  CurValue |= Value << CurBit;
1598  if (CurBit + NumBits < 64) {
1599    CurBit += NumBits;
1600    return;
1601  }
1602
1603  // Add the current word.
1604  Data.push_back(CurValue);
1605
1606  if (CurBit)
1607    CurValue = Value >> (64-CurBit);
1608  else
1609    CurValue = 0;
1610  CurBit = (CurBit+NumBits) & 63;
1611}
1612
1613void ModuleSignature::flush() {
1614  if (CurBit == 0)
1615    return;
1616
1617  Data.push_back(CurValue);
1618  CurBit = 0;
1619  CurValue = 0;
1620}
1621
1622void ModuleSignature::add(StringRef Value) {
1623  for (StringRef::iterator I = Value.begin(), IEnd = Value.end(); I != IEnd;++I)
1624    add(*I, 8);
1625}
1626
1627llvm::APInt ModuleSignature::getAsInteger() const {
1628  return llvm::APInt(Data.size() * 64, Data);
1629}
1630
1631std::string CompilerInvocation::getModuleHash() const {
1632  // Note: For QoI reasons, the things we use as a hash here should all be
1633  // dumped via the -module-info flag.
1634  using llvm::hash_code;
1635  using llvm::hash_value;
1636  using llvm::hash_combine;
1637
1638  // Start the signature with the compiler version.
1639  // FIXME: We'd rather use something more cryptographically sound than
1640  // CityHash, but this will do for now.
1641  hash_code code = hash_value(getClangFullRepositoryVersion());
1642
1643  // Extend the signature with the language options
1644#define LANGOPT(Name, Bits, Default, Description) \
1645   code = hash_combine(code, LangOpts->Name);
1646#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
1647  code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
1648#define BENIGN_LANGOPT(Name, Bits, Default, Description)
1649#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
1650#include "clang/Basic/LangOptions.def"
1651
1652  // Extend the signature with the target options.
1653  code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
1654                      TargetOpts->ABI, TargetOpts->CXXABI,
1655                      TargetOpts->LinkerVersion);
1656  for (unsigned i = 0, n = TargetOpts->FeaturesAsWritten.size(); i != n; ++i)
1657    code = hash_combine(code, TargetOpts->FeaturesAsWritten[i]);
1658
1659  // Extend the signature with preprocessor options.
1660  const PreprocessorOptions &ppOpts = getPreprocessorOpts();
1661  const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
1662  code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
1663
1664  std::vector<StringRef> MacroDefs;
1665  for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
1666            I = getPreprocessorOpts().Macros.begin(),
1667         IEnd = getPreprocessorOpts().Macros.end();
1668       I != IEnd; ++I) {
1669    // If we're supposed to ignore this macro for the purposes of modules,
1670    // don't put it into the hash.
1671    if (!hsOpts.ModulesIgnoreMacros.empty()) {
1672      // Check whether we're ignoring this macro.
1673      StringRef MacroDef = I->first;
1674      if (hsOpts.ModulesIgnoreMacros.count(MacroDef.split('=').first))
1675        continue;
1676    }
1677
1678    code = hash_combine(code, I->first, I->second);
1679  }
1680
1681  // Extend the signature with the sysroot.
1682  code = hash_combine(code, hsOpts.Sysroot, hsOpts.UseBuiltinIncludes,
1683                      hsOpts.UseStandardSystemIncludes,
1684                      hsOpts.UseStandardCXXIncludes,
1685                      hsOpts.UseLibcxx);
1686
1687  return llvm::APInt(64, code).toString(36, /*Signed=*/false);
1688}
1689