CompilerInvocation.cpp revision 7efb8af368309b5a2e5f9fa4df6da136d1c5ac54 
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"
33#include <sys/stat.h>
34using namespace clang;
35
36//===----------------------------------------------------------------------===//
37// Initialization.
38//===----------------------------------------------------------------------===//
39
40CompilerInvocationBase::CompilerInvocationBase()
41  : LangOpts(new LangOptions()), TargetOpts(new TargetOptions()),
42    DiagnosticOpts(new DiagnosticOptions()),
43    HeaderSearchOpts(new HeaderSearchOptions()),
44    PreprocessorOpts(new PreprocessorOptions()) {}
45
46CompilerInvocationBase::CompilerInvocationBase(const CompilerInvocationBase &X)
47  : RefCountedBase<CompilerInvocation>(),
48    LangOpts(new LangOptions(*X.getLangOpts())),
49    TargetOpts(new TargetOptions(X.getTargetOpts())),
50    DiagnosticOpts(new DiagnosticOptions(X.getDiagnosticOpts())),
51    HeaderSearchOpts(new HeaderSearchOptions(X.getHeaderSearchOpts())),
52    PreprocessorOpts(new PreprocessorOptions(X.getPreprocessorOpts())) {}
53
54//===----------------------------------------------------------------------===//
55// Deserialization (from args)
56//===----------------------------------------------------------------------===//
57
58using namespace clang::driver;
59using namespace clang::driver::options;
60
61//
62
63static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
64                                     DiagnosticsEngine &Diags) {
65  unsigned DefaultOpt = 0;
66  if (IK == IK_OpenCL && !Args.hasArg(OPT_cl_opt_disable))
67    DefaultOpt = 2;
68
69  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
70    if (A->getOption().matches(options::OPT_O0))
71      return 0;
72
73    if (A->getOption().matches(options::OPT_Ofast))
74      return 3;
75
76    assert (A->getOption().matches(options::OPT_O));
77
78    StringRef S(A->getValue());
79    if (S == "s" || S == "z" || S.empty())
80      return 2;
81
82    return Args.getLastArgIntValue(OPT_O, DefaultOpt, Diags);
83  }
84
85  return DefaultOpt;
86}
87
88static unsigned getOptimizationLevelSize(ArgList &Args) {
89  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
90    if (A->getOption().matches(options::OPT_O)) {
91      switch (A->getValue()[0]) {
92      default:
93        return 0;
94      case 's':
95        return 1;
96      case 'z':
97        return 2;
98      }
99    }
100  }
101  return 0;
102}
103
104static void addWarningArgs(ArgList &Args, std::vector<std::string> &Warnings) {
105  for (arg_iterator I = Args.filtered_begin(OPT_W_Group),
106         E = Args.filtered_end(); I != E; ++I) {
107    Arg *A = *I;
108    // If the argument is a pure flag, add its name (minus the "W" at the beginning)
109    // to the warning list. Else, add its value (for the OPT_W case).
110    if (A->getOption().getKind() == Option::FlagClass) {
111      Warnings.push_back(A->getOption().getName().substr(1));
112    } else {
113      for (unsigned Idx = 0, End = A->getNumValues();
114           Idx < End; ++Idx) {
115        StringRef V = A->getValue(Idx);
116        // "-Wl," and such are not warning options.
117        // FIXME: Should be handled by putting these in separate flags.
118        if (V.startswith("l,") || V.startswith("a,") || V.startswith("p,"))
119          continue;
120
121        Warnings.push_back(V);
122      }
123    }
124  }
125}
126
127static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
128                              DiagnosticsEngine &Diags) {
129  using namespace options;
130  bool Success = true;
131  if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
132    StringRef Name = A->getValue();
133    AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
134#define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
135      .Case(CMDFLAG, NAME##Model)
136#include "clang/StaticAnalyzer/Core/Analyses.def"
137      .Default(NumStores);
138    if (Value == NumStores) {
139      Diags.Report(diag::err_drv_invalid_value)
140        << A->getAsString(Args) << Name;
141      Success = false;
142    } else {
143      Opts.AnalysisStoreOpt = Value;
144    }
145  }
146
147  if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
148    StringRef Name = A->getValue();
149    AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
150#define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
151      .Case(CMDFLAG, NAME##Model)
152#include "clang/StaticAnalyzer/Core/Analyses.def"
153      .Default(NumConstraints);
154    if (Value == NumConstraints) {
155      Diags.Report(diag::err_drv_invalid_value)
156        << A->getAsString(Args) << Name;
157      Success = false;
158    } else {
159      Opts.AnalysisConstraintsOpt = Value;
160    }
161  }
162
163  if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
164    StringRef Name = A->getValue();
165    AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
166#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
167      .Case(CMDFLAG, PD_##NAME)
168#include "clang/StaticAnalyzer/Core/Analyses.def"
169      .Default(NUM_ANALYSIS_DIAG_CLIENTS);
170    if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
171      Diags.Report(diag::err_drv_invalid_value)
172        << A->getAsString(Args) << Name;
173      Success = false;
174    } else {
175      Opts.AnalysisDiagOpt = Value;
176    }
177  }
178
179  if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
180    StringRef Name = A->getValue();
181    AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
182#define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
183      .Case(CMDFLAG, NAME)
184#include "clang/StaticAnalyzer/Core/Analyses.def"
185      .Default(NumPurgeModes);
186    if (Value == NumPurgeModes) {
187      Diags.Report(diag::err_drv_invalid_value)
188        << A->getAsString(Args) << Name;
189      Success = false;
190    } else {
191      Opts.AnalysisPurgeOpt = Value;
192    }
193  }
194
195  if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
196    StringRef Name = A->getValue();
197    AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
198#define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
199      .Case(CMDFLAG, NAME)
200#include "clang/StaticAnalyzer/Core/Analyses.def"
201      .Default(NumInliningModes);
202    if (Value == NumInliningModes) {
203      Diags.Report(diag::err_drv_invalid_value)
204        << A->getAsString(Args) << Name;
205      Success = false;
206    } else {
207      Opts.InliningMode = Value;
208    }
209  }
210
211  Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
212  Opts.visualizeExplodedGraphWithGraphViz =
213    Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
214  Opts.visualizeExplodedGraphWithUbiGraph =
215    Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
216  Opts.NoRetryExhausted = Args.hasArg(OPT_analyzer_disable_retry_exhausted);
217  Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
218  Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
219  Opts.AnalyzeNestedBlocks =
220    Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
221  Opts.eagerlyAssumeBinOpBifurcation = Args.hasArg(OPT_analyzer_eagerly_assume);
222  Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
223  Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
224  Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
225  Opts.maxBlockVisitOnPath = Args.getLastArgIntValue(OPT_analyzer_max_loop, 4, Diags);
226  Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
227  Opts.InlineMaxStackDepth =
228    Args.getLastArgIntValue(OPT_analyzer_inline_max_stack_depth,
229                            Opts.InlineMaxStackDepth, Diags);
230
231  Opts.CheckersControlList.clear();
232  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_checker,
233                                             OPT_analyzer_disable_checker),
234         ie = Args.filtered_end(); it != ie; ++it) {
235    const Arg *A = *it;
236    A->claim();
237    bool enable = (A->getOption().getID() == OPT_analyzer_checker);
238    // We can have a list of comma separated checker names, e.g:
239    // '-analyzer-checker=cocoa,unix'
240    StringRef checkerList = A->getValue();
241    SmallVector<StringRef, 4> checkers;
242    checkerList.split(checkers, ",");
243    for (unsigned i = 0, e = checkers.size(); i != e; ++i)
244      Opts.CheckersControlList.push_back(std::make_pair(checkers[i], enable));
245  }
246
247  // Go through the analyzer configuration options.
248  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_config),
249       ie = Args.filtered_end(); it != ie; ++it) {
250    const Arg *A = *it;
251    A->claim();
252    // We can have a list of comma separated config names, e.g:
253    // '-analyzer-config key1=val1,key2=val2'
254    StringRef configList = A->getValue();
255    SmallVector<StringRef, 4> configVals;
256    configList.split(configVals, ",");
257    for (unsigned i = 0, e = configVals.size(); i != e; ++i) {
258      StringRef key, val;
259      llvm::tie(key, val) = configVals[i].split("=");
260      if (val.empty()) {
261        Diags.Report(SourceLocation(),
262                     diag::err_analyzer_config_no_value) << configVals[i];
263        Success = false;
264        break;
265      }
266      if (val.find('=') != StringRef::npos) {
267        Diags.Report(SourceLocation(),
268                     diag::err_analyzer_config_multiple_values)
269          << configVals[i];
270        Success = false;
271        break;
272      }
273      Opts.Config[key] = val;
274    }
275  }
276
277  return Success;
278}
279
280static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
281  Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
282  Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
283  return true;
284}
285
286static void ParseCommentArgs(CommentOptions &Opts, ArgList &Args) {
287  Opts.BlockCommandNames = Args.getAllArgValues(OPT_fcomment_block_commands);
288  Opts.ParseAllComments = Args.hasArg(OPT_fparse_all_comments);
289}
290
291static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
292                             DiagnosticsEngine &Diags) {
293  using namespace options;
294  bool Success = true;
295
296  unsigned OptLevel = getOptimizationLevel(Args, IK, Diags);
297  if (OptLevel > 3) {
298    Diags.Report(diag::err_drv_invalid_value)
299      << Args.getLastArg(OPT_O)->getAsString(Args) << OptLevel;
300    OptLevel = 3;
301    Success = false;
302  }
303  Opts.OptimizationLevel = OptLevel;
304
305  // We must always run at least the always inlining pass.
306  Opts.setInlining(
307    (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
308                                 : CodeGenOptions::OnlyAlwaysInlining);
309  // -fno-inline-functions overrides OptimizationLevel > 1.
310  Opts.NoInline = Args.hasArg(OPT_fno_inline);
311  Opts.setInlining(Args.hasArg(OPT_fno_inline_functions) ?
312                     CodeGenOptions::OnlyAlwaysInlining : Opts.getInlining());
313
314  if (Args.hasArg(OPT_gline_tables_only)) {
315    Opts.setDebugInfo(CodeGenOptions::DebugLineTablesOnly);
316  } else if (Args.hasArg(OPT_g_Flag)) {
317    if (Args.hasFlag(OPT_flimit_debug_info, OPT_fno_limit_debug_info, true))
318      Opts.setDebugInfo(CodeGenOptions::LimitedDebugInfo);
319    else
320      Opts.setDebugInfo(CodeGenOptions::FullDebugInfo);
321  }
322  Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
323  Opts.SplitDwarfFile = Args.getLastArgValue(OPT_split_dwarf_file);
324
325  Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
326  Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
327  Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
328  Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
329    OPT_fuse_register_sized_bitfield_access);
330  Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
331  Opts.StructPathTBAA = Args.hasArg(OPT_struct_path_tbaa);
332  Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
333  Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
334  Opts.NoCommon = Args.hasArg(OPT_fno_common);
335  Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
336  Opts.OptimizeSize = getOptimizationLevelSize(Args);
337  Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
338                            Args.hasArg(OPT_ffreestanding));
339  Opts.UnrollLoops = Args.hasArg(OPT_funroll_loops) ||
340                     (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
341
342  Opts.Autolink = !Args.hasArg(OPT_fno_autolink);
343  Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
344  Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
345  Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);
346  Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
347  Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
348  Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
349  Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
350  Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
351  Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
352  Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
353  Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
354  Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
355  Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
356  Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
357                       Args.hasArg(OPT_cl_finite_math_only)||
358                       Args.hasArg(OPT_cl_fast_relaxed_math));
359  Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
360                       Args.hasArg(OPT_cl_finite_math_only)||
361                       Args.hasArg(OPT_cl_fast_relaxed_math));
362  Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
363  Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
364  Opts.NumRegisterParameters = Args.getLastArgIntValue(OPT_mregparm, 0, Diags);
365  Opts.NoGlobalMerge = Args.hasArg(OPT_mno_global_merge);
366  Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
367  Opts.EnableSegmentedStacks = Args.hasArg(OPT_split_stacks);
368  Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
369  Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
370  Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
371  Opts.NoDwarf2CFIAsm = Args.hasArg(OPT_fno_dwarf2_cfi_asm);
372  Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
373  Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
374  Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
375  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
376                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
377                      Args.hasArg(OPT_cl_fast_relaxed_math);
378  Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
379  Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
380  Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
381  Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
382
383  Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
384  Opts.DataSections = Args.hasArg(OPT_fdata_sections);
385
386  Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
387  Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
388  Opts.SanitizeRecover = !Args.hasArg(OPT_fno_sanitize_recover);
389
390  Opts.DisableGCov = Args.hasArg(OPT_test_coverage);
391  Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
392  Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
393  if (Opts.EmitGcovArcs || Opts.EmitGcovNotes) {
394  Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
395    Opts.CoverageExtraChecksum = Args.hasArg(OPT_coverage_cfg_checksum);
396    Opts.CoverageNoFunctionNamesInData =
397        Args.hasArg(OPT_coverage_no_function_names_in_data);
398    if (Args.hasArg(OPT_coverage_version_EQ)) {
399      StringRef CoverageVersion = Args.getLastArgValue(OPT_coverage_version_EQ);
400      if (CoverageVersion.size() != 4) {
401        Diags.Report(diag::err_drv_invalid_value)
402            << Args.getLastArg(OPT_coverage_version_EQ)->getAsString(Args)
403            << CoverageVersion;
404      } else {
405        memcpy(Opts.CoverageVersion, CoverageVersion.data(), 4);
406      }
407    }
408  }
409
410  Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
411  Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
412  Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
413  Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
414  Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
415  Opts.SanitizerBlacklistFile = Args.getLastArgValue(OPT_fsanitize_blacklist);
416  Opts.SanitizeMemoryTrackOrigins =
417    Args.hasArg(OPT_fsanitize_memory_track_origins);
418  Opts.SanitizeAddressZeroBaseShadow =
419    Args.hasArg(OPT_fsanitize_address_zero_base_shadow);
420  Opts.SanitizeUndefinedTrapOnError =
421    Args.hasArg(OPT_fsanitize_undefined_trap_on_error);
422  Opts.SSPBufferSize =
423    Args.getLastArgIntValue(OPT_stack_protector_buffer_size, 8, Diags);
424  Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
425  if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
426    StringRef Val = A->getValue();
427    unsigned StackAlignment = Opts.StackAlignment;
428    Val.getAsInteger(10, StackAlignment);
429    Opts.StackAlignment = StackAlignment;
430  }
431
432  if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
433    StringRef Name = A->getValue();
434    unsigned Method = llvm::StringSwitch<unsigned>(Name)
435      .Case("legacy", CodeGenOptions::Legacy)
436      .Case("non-legacy", CodeGenOptions::NonLegacy)
437      .Case("mixed", CodeGenOptions::Mixed)
438      .Default(~0U);
439    if (Method == ~0U) {
440      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
441      Success = false;
442    } else {
443      Opts.setObjCDispatchMethod(
444        static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
445    }
446  }
447
448  if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
449    StringRef Name = A->getValue();
450    unsigned Model = llvm::StringSwitch<unsigned>(Name)
451        .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
452        .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
453        .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
454        .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
455        .Default(~0U);
456    if (Model == ~0U) {
457      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
458      Success = false;
459    } else {
460      Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
461    }
462  }
463
464  if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
465    StringRef Val = A->getValue();
466    if (Val == "fast")
467      Opts.setFPContractMode(CodeGenOptions::FPC_Fast);
468    else if (Val == "on")
469      Opts.setFPContractMode(CodeGenOptions::FPC_On);
470    else if (Val == "off")
471      Opts.setFPContractMode(CodeGenOptions::FPC_Off);
472    else
473      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
474  }
475
476  return Success;
477}
478
479static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
480                                      ArgList &Args) {
481  using namespace options;
482  Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
483  Opts.Targets = Args.getAllArgValues(OPT_MT);
484  Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
485  Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
486  Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
487  Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
488  Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
489  Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
490}
491
492bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
493                                DiagnosticsEngine *Diags) {
494  using namespace options;
495  bool Success = true;
496
497  Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
498  Opts.DiagnosticSerializationFile =
499    Args.getLastArgValue(OPT_diagnostic_serialized_file);
500  Opts.IgnoreWarnings = Args.hasArg(OPT_w);
501  Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
502  Opts.Pedantic = Args.hasArg(OPT_pedantic);
503  Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
504  Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
505  Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
506  Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
507                                 OPT_fno_show_column,
508                                 /*Default=*/true);
509  Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
510  Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
511  Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
512
513  // Default behavior is to not to show note include stacks.
514  Opts.ShowNoteIncludeStack = false;
515  if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
516                               OPT_fno_diagnostics_show_note_include_stack))
517    if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
518      Opts.ShowNoteIncludeStack = true;
519
520  StringRef ShowOverloads =
521    Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
522  if (ShowOverloads == "best")
523    Opts.setShowOverloads(Ovl_Best);
524  else if (ShowOverloads == "all")
525    Opts.setShowOverloads(Ovl_All);
526  else {
527    Success = false;
528    if (Diags)
529      Diags->Report(diag::err_drv_invalid_value)
530      << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
531      << ShowOverloads;
532  }
533
534  StringRef ShowCategory =
535    Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
536  if (ShowCategory == "none")
537    Opts.ShowCategories = 0;
538  else if (ShowCategory == "id")
539    Opts.ShowCategories = 1;
540  else if (ShowCategory == "name")
541    Opts.ShowCategories = 2;
542  else {
543    Success = false;
544    if (Diags)
545      Diags->Report(diag::err_drv_invalid_value)
546      << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
547      << ShowCategory;
548  }
549
550  StringRef Format =
551    Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
552  if (Format == "clang")
553    Opts.setFormat(DiagnosticOptions::Clang);
554  else if (Format == "msvc")
555    Opts.setFormat(DiagnosticOptions::Msvc);
556  else if (Format == "vi")
557    Opts.setFormat(DiagnosticOptions::Vi);
558  else {
559    Success = false;
560    if (Diags)
561      Diags->Report(diag::err_drv_invalid_value)
562      << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
563      << Format;
564  }
565
566  Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
567  Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
568  Opts.ShowPresumedLoc = !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
569  Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
570  Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
571  Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
572  Opts.ErrorLimit = Args.getLastArgIntValue(OPT_ferror_limit, 0, Diags);
573  Opts.MacroBacktraceLimit
574    = Args.getLastArgIntValue(OPT_fmacro_backtrace_limit,
575                         DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
576  Opts.TemplateBacktraceLimit
577    = Args.getLastArgIntValue(OPT_ftemplate_backtrace_limit,
578                         DiagnosticOptions::DefaultTemplateBacktraceLimit,
579                         Diags);
580  Opts.ConstexprBacktraceLimit
581    = Args.getLastArgIntValue(OPT_fconstexpr_backtrace_limit,
582                         DiagnosticOptions::DefaultConstexprBacktraceLimit,
583                         Diags);
584  Opts.TabStop = Args.getLastArgIntValue(OPT_ftabstop,
585                                    DiagnosticOptions::DefaultTabStop, Diags);
586  if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
587    Opts.TabStop = DiagnosticOptions::DefaultTabStop;
588    if (Diags)
589      Diags->Report(diag::warn_ignoring_ftabstop_value)
590      << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
591  }
592  Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
593  addWarningArgs(Args, Opts.Warnings);
594
595  return Success;
596}
597
598static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
599  Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
600}
601
602static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
603                                   DiagnosticsEngine &Diags) {
604  using namespace options;
605  Opts.ProgramAction = frontend::ParseSyntaxOnly;
606  if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
607    switch (A->getOption().getID()) {
608    default:
609      llvm_unreachable("Invalid option in group!");
610    case OPT_ast_list:
611      Opts.ProgramAction = frontend::ASTDeclList; break;
612    case OPT_ast_dump:
613      Opts.ProgramAction = frontend::ASTDump; break;
614    case OPT_ast_dump_xml:
615      Opts.ProgramAction = frontend::ASTDumpXML; break;
616    case OPT_ast_print:
617      Opts.ProgramAction = frontend::ASTPrint; break;
618    case OPT_ast_view:
619      Opts.ProgramAction = frontend::ASTView; break;
620    case OPT_dump_raw_tokens:
621      Opts.ProgramAction = frontend::DumpRawTokens; break;
622    case OPT_dump_tokens:
623      Opts.ProgramAction = frontend::DumpTokens; break;
624    case OPT_S:
625      Opts.ProgramAction = frontend::EmitAssembly; break;
626    case OPT_emit_llvm_bc:
627      Opts.ProgramAction = frontend::EmitBC; break;
628    case OPT_emit_html:
629      Opts.ProgramAction = frontend::EmitHTML; break;
630    case OPT_emit_llvm:
631      Opts.ProgramAction = frontend::EmitLLVM; break;
632    case OPT_emit_llvm_only:
633      Opts.ProgramAction = frontend::EmitLLVMOnly; break;
634    case OPT_emit_codegen_only:
635      Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
636    case OPT_emit_obj:
637      Opts.ProgramAction = frontend::EmitObj; break;
638    case OPT_fixit_EQ:
639      Opts.FixItSuffix = A->getValue();
640      // fall-through!
641    case OPT_fixit:
642      Opts.ProgramAction = frontend::FixIt; break;
643    case OPT_emit_module:
644      Opts.ProgramAction = frontend::GenerateModule; break;
645    case OPT_emit_pch:
646      Opts.ProgramAction = frontend::GeneratePCH; break;
647    case OPT_emit_pth:
648      Opts.ProgramAction = frontend::GeneratePTH; break;
649    case OPT_init_only:
650      Opts.ProgramAction = frontend::InitOnly; break;
651    case OPT_fsyntax_only:
652      Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
653    case OPT_module_file_info:
654      Opts.ProgramAction = frontend::ModuleFileInfo; break;
655    case OPT_print_decl_contexts:
656      Opts.ProgramAction = frontend::PrintDeclContext; break;
657    case OPT_print_preamble:
658      Opts.ProgramAction = frontend::PrintPreamble; break;
659    case OPT_E:
660      Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
661    case OPT_rewrite_macros:
662      Opts.ProgramAction = frontend::RewriteMacros; break;
663    case OPT_rewrite_objc:
664      Opts.ProgramAction = frontend::RewriteObjC; break;
665    case OPT_rewrite_test:
666      Opts.ProgramAction = frontend::RewriteTest; break;
667    case OPT_analyze:
668      Opts.ProgramAction = frontend::RunAnalysis; break;
669    case OPT_migrate:
670      Opts.ProgramAction = frontend::MigrateSource; break;
671    case OPT_Eonly:
672      Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
673    }
674  }
675
676  if (const Arg* A = Args.getLastArg(OPT_plugin)) {
677    Opts.Plugins.push_back(A->getValue(0));
678    Opts.ProgramAction = frontend::PluginAction;
679    Opts.ActionName = A->getValue();
680
681    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
682           end = Args.filtered_end(); it != end; ++it) {
683      if ((*it)->getValue(0) == Opts.ActionName)
684        Opts.PluginArgs.push_back((*it)->getValue(1));
685    }
686  }
687
688  Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
689  Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
690  for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
691    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
692           end = Args.filtered_end(); it != end; ++it) {
693      if ((*it)->getValue(0) == Opts.AddPluginActions[i])
694        Opts.AddPluginArgs[i].push_back((*it)->getValue(1));
695    }
696  }
697
698  if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
699    Opts.CodeCompletionAt =
700      ParsedSourceLocation::FromString(A->getValue());
701    if (Opts.CodeCompletionAt.FileName.empty())
702      Diags.Report(diag::err_drv_invalid_value)
703        << A->getAsString(Args) << A->getValue();
704  }
705  Opts.DisableFree = Args.hasArg(OPT_disable_free);
706
707  Opts.OutputFile = Args.getLastArgValue(OPT_o);
708  Opts.Plugins = Args.getAllArgValues(OPT_load);
709  Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
710  Opts.ShowHelp = Args.hasArg(OPT_help);
711  Opts.ShowStats = Args.hasArg(OPT_print_stats);
712  Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
713  Opts.ShowVersion = Args.hasArg(OPT_version);
714  Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
715  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
716  Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
717  Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
718  Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
719  Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
720  Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
721  Opts.UseGlobalModuleIndex = !Args.hasArg(OPT_fno_modules_global_index);
722  Opts.GenerateGlobalModuleIndex = Opts.UseGlobalModuleIndex;
723
724  Opts.CodeCompleteOpts.IncludeMacros
725    = Args.hasArg(OPT_code_completion_macros);
726  Opts.CodeCompleteOpts.IncludeCodePatterns
727    = Args.hasArg(OPT_code_completion_patterns);
728  Opts.CodeCompleteOpts.IncludeGlobals
729    = !Args.hasArg(OPT_no_code_completion_globals);
730  Opts.CodeCompleteOpts.IncludeBriefComments
731    = Args.hasArg(OPT_code_completion_brief_comments);
732
733  Opts.OverrideRecordLayoutsFile
734    = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
735  if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
736                                     OPT_arcmt_modify,
737                                     OPT_arcmt_migrate)) {
738    switch (A->getOption().getID()) {
739    default:
740      llvm_unreachable("missed a case");
741    case OPT_arcmt_check:
742      Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
743      break;
744    case OPT_arcmt_modify:
745      Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
746      break;
747    case OPT_arcmt_migrate:
748      Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
749      break;
750    }
751  }
752  Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
753  Opts.ARCMTMigrateReportOut
754    = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
755  Opts.ARCMTMigrateEmitARCErrors
756    = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
757
758  if (Args.hasArg(OPT_objcmt_migrate_literals))
759    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
760  if (Args.hasArg(OPT_objcmt_migrate_subscripting))
761    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
762
763  if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
764      Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
765    Diags.Report(diag::err_drv_argument_not_allowed_with)
766      << "ARC migration" << "ObjC migration";
767  }
768
769  InputKind DashX = IK_None;
770  if (const Arg *A = Args.getLastArg(OPT_x)) {
771    DashX = llvm::StringSwitch<InputKind>(A->getValue())
772      .Case("c", IK_C)
773      .Case("cl", IK_OpenCL)
774      .Case("cuda", IK_CUDA)
775      .Case("c++", IK_CXX)
776      .Case("objective-c", IK_ObjC)
777      .Case("objective-c++", IK_ObjCXX)
778      .Case("cpp-output", IK_PreprocessedC)
779      .Case("assembler-with-cpp", IK_Asm)
780      .Case("c++-cpp-output", IK_PreprocessedCXX)
781      .Case("objective-c-cpp-output", IK_PreprocessedObjC)
782      .Case("objc-cpp-output", IK_PreprocessedObjC)
783      .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
784      .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
785      .Case("c-header", IK_C)
786      .Case("cl-header", IK_OpenCL)
787      .Case("objective-c-header", IK_ObjC)
788      .Case("c++-header", IK_CXX)
789      .Case("objective-c++-header", IK_ObjCXX)
790      .Cases("ast", "pcm", IK_AST)
791      .Case("ir", IK_LLVM_IR)
792      .Default(IK_None);
793    if (DashX == IK_None)
794      Diags.Report(diag::err_drv_invalid_value)
795        << A->getAsString(Args) << A->getValue();
796  }
797
798  // '-' is the default input if none is given.
799  std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
800  Opts.Inputs.clear();
801  if (Inputs.empty())
802    Inputs.push_back("-");
803  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
804    InputKind IK = DashX;
805    if (IK == IK_None) {
806      IK = FrontendOptions::getInputKindForExtension(
807        StringRef(Inputs[i]).rsplit('.').second);
808      // FIXME: Remove this hack.
809      if (i == 0)
810        DashX = IK;
811    }
812    Opts.Inputs.push_back(FrontendInputFile(Inputs[i], IK));
813  }
814
815  return DashX;
816}
817
818std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
819                                                 void *MainAddr) {
820  llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
821
822  if (!P.isEmpty()) {
823    P.eraseComponent();  // Remove /clang from foo/bin/clang
824    P.eraseComponent();  // Remove /bin   from foo/bin
825
826    // Get foo/lib/clang/<version>/include
827    P.appendComponent("lib");
828    P.appendComponent("clang");
829    P.appendComponent(CLANG_VERSION_STRING);
830  }
831
832  return P.str();
833}
834
835static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
836  using namespace options;
837  Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
838  Opts.Verbose = Args.hasArg(OPT_v);
839  Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
840  Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
841  Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
842  if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
843    Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
844  Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
845  Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodules_cache_path);
846  Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
847  Opts.ModuleCachePruneInterval
848    = Args.getLastArgIntValue(OPT_fmodules_prune_interval, 7*24*60*60);
849  Opts.ModuleCachePruneAfter
850    = Args.getLastArgIntValue(OPT_fmodules_prune_after, 31*24*60*60);
851  for (arg_iterator it = Args.filtered_begin(OPT_fmodules_ignore_macro),
852       ie = Args.filtered_end(); it != ie; ++it) {
853    StringRef MacroDef = (*it)->getValue();
854    Opts.ModulesIgnoreMacros.insert(MacroDef.split('=').first);
855  }
856
857  // Add -I..., -F..., and -index-header-map options in order.
858  bool IsIndexHeaderMap = false;
859  for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F,
860                                             OPT_index_header_map),
861       ie = Args.filtered_end(); it != ie; ++it) {
862    if ((*it)->getOption().matches(OPT_index_header_map)) {
863      // -index-header-map applies to the next -I or -F.
864      IsIndexHeaderMap = true;
865      continue;
866    }
867
868    frontend::IncludeDirGroup Group
869      = IsIndexHeaderMap? frontend::IndexHeaderMap : frontend::Angled;
870
871    Opts.AddPath((*it)->getValue(), Group,
872                 /*IsFramework=*/ (*it)->getOption().matches(OPT_F), true);
873    IsIndexHeaderMap = false;
874  }
875
876  // Add -iprefix/-iwithprefix/-iwithprefixbefore options.
877  StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
878  for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
879                                             OPT_iwithprefixbefore),
880         ie = Args.filtered_end(); it != ie; ++it) {
881    const Arg *A = *it;
882    if (A->getOption().matches(OPT_iprefix))
883      Prefix = A->getValue();
884    else if (A->getOption().matches(OPT_iwithprefix))
885      Opts.AddPath(Prefix.str() + A->getValue(),
886                   frontend::After, false, true);
887    else
888      Opts.AddPath(Prefix.str() + A->getValue(),
889                   frontend::Angled, false, true);
890  }
891
892  for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
893         ie = Args.filtered_end(); it != ie; ++it)
894    Opts.AddPath((*it)->getValue(), frontend::After, false, true);
895  for (arg_iterator it = Args.filtered_begin(OPT_iquote),
896         ie = Args.filtered_end(); it != ie; ++it)
897    Opts.AddPath((*it)->getValue(), frontend::Quoted, false, true);
898  for (arg_iterator it = Args.filtered_begin(OPT_isystem,
899         OPT_iwithsysroot), ie = Args.filtered_end(); it != ie; ++it)
900    Opts.AddPath((*it)->getValue(), frontend::System, false,
901                 !(*it)->getOption().matches(OPT_iwithsysroot));
902  for (arg_iterator it = Args.filtered_begin(OPT_iframework),
903         ie = Args.filtered_end(); it != ie; ++it)
904    Opts.AddPath((*it)->getValue(), frontend::System, true, true);
905
906  // Add the paths for the various language specific isystem flags.
907  for (arg_iterator it = Args.filtered_begin(OPT_c_isystem),
908       ie = Args.filtered_end(); it != ie; ++it)
909    Opts.AddPath((*it)->getValue(), frontend::CSystem, false, true);
910  for (arg_iterator it = Args.filtered_begin(OPT_cxx_isystem),
911       ie = Args.filtered_end(); it != ie; ++it)
912    Opts.AddPath((*it)->getValue(), frontend::CXXSystem, false, true);
913  for (arg_iterator it = Args.filtered_begin(OPT_objc_isystem),
914       ie = Args.filtered_end(); it != ie; ++it)
915    Opts.AddPath((*it)->getValue(), frontend::ObjCSystem, false,true);
916  for (arg_iterator it = Args.filtered_begin(OPT_objcxx_isystem),
917       ie = Args.filtered_end(); it != ie; ++it)
918    Opts.AddPath((*it)->getValue(), frontend::ObjCXXSystem, false, true);
919
920  // Add the internal paths from a driver that detects standard include paths.
921  for (arg_iterator I = Args.filtered_begin(OPT_internal_isystem,
922                                            OPT_internal_externc_isystem),
923                    E = Args.filtered_end();
924       I != E; ++I) {
925    frontend::IncludeDirGroup Group = frontend::System;
926    if ((*I)->getOption().matches(OPT_internal_externc_isystem))
927      Group = frontend::ExternCSystem;
928    Opts.AddPath((*I)->getValue(), Group, false, true);
929  }
930
931  // Add the path prefixes which are implicitly treated as being system headers.
932  for (arg_iterator I = Args.filtered_begin(OPT_isystem_prefix,
933                                            OPT_ino_system_prefix),
934                    E = Args.filtered_end();
935       I != E; ++I)
936    Opts.AddSystemHeaderPrefix((*I)->getValue(),
937                               (*I)->getOption().matches(OPT_isystem_prefix));
938}
939
940void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
941                                         LangStandard::Kind LangStd) {
942  // Set some properties which depend solely on the input kind; it would be nice
943  // to move these to the language standard, and have the driver resolve the
944  // input kind + language standard.
945  if (IK == IK_Asm) {
946    Opts.AsmPreprocessor = 1;
947  } else if (IK == IK_ObjC ||
948             IK == IK_ObjCXX ||
949             IK == IK_PreprocessedObjC ||
950             IK == IK_PreprocessedObjCXX) {
951    Opts.ObjC1 = Opts.ObjC2 = 1;
952  }
953
954  if (LangStd == LangStandard::lang_unspecified) {
955    // Based on the base language, pick one.
956    switch (IK) {
957    case IK_None:
958    case IK_AST:
959    case IK_LLVM_IR:
960      llvm_unreachable("Invalid input kind!");
961    case IK_OpenCL:
962      LangStd = LangStandard::lang_opencl;
963      break;
964    case IK_CUDA:
965      LangStd = LangStandard::lang_cuda;
966      break;
967    case IK_Asm:
968    case IK_C:
969    case IK_PreprocessedC:
970    case IK_ObjC:
971    case IK_PreprocessedObjC:
972      LangStd = LangStandard::lang_gnu99;
973      break;
974    case IK_CXX:
975    case IK_PreprocessedCXX:
976    case IK_ObjCXX:
977    case IK_PreprocessedObjCXX:
978      LangStd = LangStandard::lang_gnucxx98;
979      break;
980    }
981  }
982
983  const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
984  Opts.LineComment = Std.hasLineComments();
985  Opts.C99 = Std.isC99();
986  Opts.C11 = Std.isC11();
987  Opts.CPlusPlus = Std.isCPlusPlus();
988  Opts.CPlusPlus11 = Std.isCPlusPlus11();
989  Opts.CPlusPlus1y = Std.isCPlusPlus1y();
990  Opts.Digraphs = Std.hasDigraphs();
991  Opts.GNUMode = Std.isGNUMode();
992  Opts.GNUInline = !Std.isC99();
993  Opts.HexFloats = Std.hasHexFloats();
994  Opts.ImplicitInt = Std.hasImplicitInt();
995
996  // Set OpenCL Version.
997  if (LangStd == LangStandard::lang_opencl) {
998    Opts.OpenCL = 1;
999    Opts.OpenCLVersion = 100;
1000  }
1001  else if (LangStd == LangStandard::lang_opencl11) {
1002      Opts.OpenCL = 1;
1003      Opts.OpenCLVersion = 110;
1004  }
1005  else if (LangStd == LangStandard::lang_opencl12) {
1006    Opts.OpenCL = 1;
1007    Opts.OpenCLVersion = 120;
1008  }
1009
1010  // OpenCL has some additional defaults.
1011  if (Opts.OpenCL) {
1012    Opts.AltiVec = 0;
1013    Opts.CXXOperatorNames = 1;
1014    Opts.LaxVectorConversions = 0;
1015    Opts.DefaultFPContract = 1;
1016    Opts.NativeHalfType = 1;
1017  }
1018
1019  if (LangStd == LangStandard::lang_cuda)
1020    Opts.CUDA = 1;
1021
1022  // OpenCL and C++ both have bool, true, false keywords.
1023  Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1024
1025  // C++ has wchar_t keyword.
1026  Opts.WChar = Opts.CPlusPlus;
1027
1028  Opts.GNUKeywords = Opts.GNUMode;
1029  Opts.CXXOperatorNames = Opts.CPlusPlus;
1030
1031  // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1032  // is specified, or -std is set to a conforming mode.
1033  Opts.Trigraphs = !Opts.GNUMode;
1034
1035  Opts.DollarIdents = !Opts.AsmPreprocessor;
1036}
1037
1038/// Attempt to parse a visibility value out of the given argument.
1039static Visibility parseVisibility(Arg *arg, ArgList &args,
1040                                  DiagnosticsEngine &diags) {
1041  StringRef value = arg->getValue();
1042  if (value == "default") {
1043    return DefaultVisibility;
1044  } else if (value == "hidden") {
1045    return HiddenVisibility;
1046  } else if (value == "protected") {
1047    // FIXME: diagnose if target does not support protected visibility
1048    return ProtectedVisibility;
1049  }
1050
1051  diags.Report(diag::err_drv_invalid_value)
1052    << arg->getAsString(args) << value;
1053  return DefaultVisibility;
1054}
1055
1056static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1057                          DiagnosticsEngine &Diags) {
1058  // FIXME: Cleanup per-file based stuff.
1059  LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1060  if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1061    LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1062#define LANGSTANDARD(id, name, desc, features) \
1063      .Case(name, LangStandard::lang_##id)
1064#include "clang/Frontend/LangStandards.def"
1065      .Default(LangStandard::lang_unspecified);
1066    if (LangStd == LangStandard::lang_unspecified)
1067      Diags.Report(diag::err_drv_invalid_value)
1068        << A->getAsString(Args) << A->getValue();
1069    else {
1070      // Valid standard, check to make sure language and standard are compatable.
1071      const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1072      switch (IK) {
1073      case IK_C:
1074      case IK_ObjC:
1075      case IK_PreprocessedC:
1076      case IK_PreprocessedObjC:
1077        if (!(Std.isC89() || Std.isC99()))
1078          Diags.Report(diag::err_drv_argument_not_allowed_with)
1079            << A->getAsString(Args) << "C/ObjC";
1080        break;
1081      case IK_CXX:
1082      case IK_ObjCXX:
1083      case IK_PreprocessedCXX:
1084      case IK_PreprocessedObjCXX:
1085        if (!Std.isCPlusPlus())
1086          Diags.Report(diag::err_drv_argument_not_allowed_with)
1087            << A->getAsString(Args) << "C++/ObjC++";
1088        break;
1089      case IK_OpenCL:
1090        if (!Std.isC99())
1091          Diags.Report(diag::err_drv_argument_not_allowed_with)
1092            << A->getAsString(Args) << "OpenCL";
1093        break;
1094      case IK_CUDA:
1095        if (!Std.isCPlusPlus())
1096          Diags.Report(diag::err_drv_argument_not_allowed_with)
1097            << A->getAsString(Args) << "CUDA";
1098        break;
1099      default:
1100        break;
1101      }
1102    }
1103  }
1104
1105  // -cl-std only applies for OpenCL language standards.
1106  // Override the -std option in this case.
1107  if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1108    LangStandard::Kind OpenCLLangStd
1109    = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1110    .Case("CL", LangStandard::lang_opencl)
1111    .Case("CL1.1", LangStandard::lang_opencl11)
1112    .Case("CL1.2", LangStandard::lang_opencl12)
1113    .Default(LangStandard::lang_unspecified);
1114
1115    if (OpenCLLangStd == LangStandard::lang_unspecified) {
1116      Diags.Report(diag::err_drv_invalid_value)
1117      << A->getAsString(Args) << A->getValue();
1118    }
1119    else
1120      LangStd = OpenCLLangStd;
1121  }
1122
1123  CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1124
1125  // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1126  // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1127  // while a subset (the non-C++ GNU keywords) is provided by GCC's
1128  // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1129  // name, as it doesn't seem a useful distinction.
1130  Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1131                                  Opts.GNUKeywords);
1132
1133  if (Args.hasArg(OPT_fno_operator_names))
1134    Opts.CXXOperatorNames = 0;
1135
1136  if (Opts.ObjC1) {
1137    if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1138      StringRef value = arg->getValue();
1139      if (Opts.ObjCRuntime.tryParse(value))
1140        Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1141    }
1142
1143    if (Args.hasArg(OPT_fobjc_gc_only))
1144      Opts.setGC(LangOptions::GCOnly);
1145    else if (Args.hasArg(OPT_fobjc_gc))
1146      Opts.setGC(LangOptions::HybridGC);
1147    else if (Args.hasArg(OPT_fobjc_arc)) {
1148      Opts.ObjCAutoRefCount = 1;
1149      if (!Opts.ObjCRuntime.allowsARC())
1150        Diags.Report(diag::err_arc_unsupported_on_runtime);
1151
1152      // Only set ObjCARCWeak if ARC is enabled.
1153      if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1154        Opts.ObjCARCWeak = 1;
1155      else
1156        Opts.ObjCARCWeak = Opts.ObjCRuntime.allowsWeak();
1157    }
1158
1159    if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1160      Opts.ObjCInferRelatedResultType = 0;
1161  }
1162
1163  if (Args.hasArg(OPT_fgnu89_inline))
1164    Opts.GNUInline = 1;
1165
1166  if (Args.hasArg(OPT_fapple_kext)) {
1167    if (!Opts.CPlusPlus)
1168      Diags.Report(diag::warn_c_kext);
1169    else
1170      Opts.AppleKext = 1;
1171  }
1172
1173  if (Args.hasArg(OPT_print_ivar_layout))
1174    Opts.ObjCGCBitmapPrint = 1;
1175  if (Args.hasArg(OPT_fno_constant_cfstrings))
1176    Opts.NoConstantCFStrings = 1;
1177
1178  if (Args.hasArg(OPT_faltivec))
1179    Opts.AltiVec = 1;
1180
1181  if (Args.hasArg(OPT_pthread))
1182    Opts.POSIXThreads = 1;
1183
1184  // The value-visibility mode defaults to "default".
1185  if (Arg *visOpt = Args.getLastArg(OPT_fvisibility)) {
1186    Opts.setValueVisibilityMode(parseVisibility(visOpt, Args, Diags));
1187  } else {
1188    Opts.setValueVisibilityMode(DefaultVisibility);
1189  }
1190
1191  // The type-visibility mode defaults to the value-visibility mode.
1192  if (Arg *typeVisOpt = Args.getLastArg(OPT_ftype_visibility)) {
1193    Opts.setTypeVisibilityMode(parseVisibility(typeVisOpt, Args, Diags));
1194  } else {
1195    Opts.setTypeVisibilityMode(Opts.getValueVisibilityMode());
1196  }
1197
1198  if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1199    Opts.InlineVisibilityHidden = 1;
1200
1201  if (Args.hasArg(OPT_ftrapv)) {
1202    Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1203    // Set the handler, if one is specified.
1204    Opts.OverflowHandler =
1205        Args.getLastArgValue(OPT_ftrapv_handler);
1206  }
1207  else if (Args.hasArg(OPT_fwrapv))
1208    Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1209
1210  if (Args.hasArg(OPT_trigraphs))
1211    Opts.Trigraphs = 1;
1212
1213  Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1214                                   OPT_fno_dollars_in_identifiers,
1215                                   Opts.DollarIdents);
1216  Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1217  Opts.MicrosoftExt
1218    = Args.hasArg(OPT_fms_extensions) || Args.hasArg(OPT_fms_compatibility);
1219  Opts.MicrosoftMode = Args.hasArg(OPT_fms_compatibility);
1220  Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
1221  Opts.MSCVersion = Args.getLastArgIntValue(OPT_fmsc_version, 0, Diags);
1222  Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1223  Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1224  Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
1225                                   Opts.ConstStrings);
1226  if (Args.hasArg(OPT_fno_lax_vector_conversions))
1227    Opts.LaxVectorConversions = 0;
1228  if (Args.hasArg(OPT_fno_threadsafe_statics))
1229    Opts.ThreadsafeStatics = 0;
1230  Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1231  Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
1232  Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
1233  Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1234  Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
1235
1236  Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1237  Opts.Blocks = Args.hasArg(OPT_fblocks);
1238  Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
1239  Opts.Modules = Args.hasArg(OPT_fmodules);
1240  Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1241  Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
1242  Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1243  Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1244  Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
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.ConstexprStepLimit = Args.getLastArgIntValue(OPT_fconstexpr_steps,
1256                                                    1048576, Diags);
1257  Opts.BracketDepth = Args.getLastArgIntValue(OPT_fbracket_depth, 256, Diags);
1258  Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
1259  Opts.NumLargeByValueCopy = Args.getLastArgIntValue(OPT_Wlarge_by_value_copy_EQ,
1260                                                    0, Diags);
1261  Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
1262  Opts.ObjCConstantStringClass =
1263    Args.getLastArgValue(OPT_fconstant_string_class);
1264  Opts.ObjCDefaultSynthProperties =
1265    Args.hasArg(OPT_fobjc_default_synthesize_properties);
1266  Opts.EncodeExtendedBlockSig =
1267    Args.hasArg(OPT_fencode_extended_block_signature);
1268  Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1269  Opts.PackStruct = Args.getLastArgIntValue(OPT_fpack_struct_EQ, 0, Diags);
1270  Opts.PICLevel = Args.getLastArgIntValue(OPT_pic_level, 0, Diags);
1271  Opts.PIELevel = Args.getLastArgIntValue(OPT_pie_level, 0, Diags);
1272  Opts.Static = Args.hasArg(OPT_static_define);
1273  Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
1274  Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
1275                        || Args.hasArg(OPT_fdump_record_layouts);
1276  Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1277  Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1278  Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1279  Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
1280  Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
1281  Opts.MRTD = Args.hasArg(OPT_mrtd);
1282  Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
1283  Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
1284  Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
1285  Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
1286  Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
1287  Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
1288  Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
1289  Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
1290
1291  // Check if -fopenmp is specified.
1292  Opts.OpenMP = Args.hasArg(OPT_fopenmp);
1293
1294  // Record whether the __DEPRECATED define was requested.
1295  Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
1296                                 OPT_fno_deprecated_macro,
1297                                 Opts.Deprecated);
1298
1299  // FIXME: Eliminate this dependency.
1300  unsigned Opt = getOptimizationLevel(Args, IK, Diags),
1301       OptSize = getOptimizationLevelSize(Args);
1302  Opts.Optimize = Opt != 0;
1303  Opts.OptimizeSize = OptSize != 0;
1304
1305  // This is the __NO_INLINE__ define, which just depends on things like the
1306  // optimization level and -fno-inline, not actually whether the backend has
1307  // inlining enabled.
1308  Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
1309
1310  Opts.FastMath = Args.hasArg(OPT_ffast_math);
1311  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only);
1312
1313  Opts.RetainCommentsFromSystemHeaders =
1314      Args.hasArg(OPT_fretain_comments_from_system_headers);
1315
1316  unsigned SSP = Args.getLastArgIntValue(OPT_stack_protector, 0, Diags);
1317  switch (SSP) {
1318  default:
1319    Diags.Report(diag::err_drv_invalid_value)
1320      << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1321    break;
1322  case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
1323  case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
1324  case 2: Opts.setStackProtector(LangOptions::SSPReq); break;
1325  }
1326
1327  // Parse -fsanitize= arguments.
1328  std::vector<std::string> Sanitizers = Args.getAllArgValues(OPT_fsanitize_EQ);
1329  for (unsigned I = 0, N = Sanitizers.size(); I != N; ++I) {
1330    // Since the Opts.Sanitize* values are bitfields, it's a little tricky to
1331    // efficiently map string values to them. Perform the mapping indirectly:
1332    // convert strings to enumerated values, then switch over the enum to set
1333    // the right bitfield value.
1334    enum Sanitizer {
1335#define SANITIZER(NAME, ID) \
1336      ID,
1337#include "clang/Basic/Sanitizers.def"
1338      Unknown
1339    };
1340    switch (llvm::StringSwitch<unsigned>(Sanitizers[I])
1341#define SANITIZER(NAME, ID) \
1342              .Case(NAME, ID)
1343#include "clang/Basic/Sanitizers.def"
1344              .Default(Unknown)) {
1345#define SANITIZER(NAME, ID) \
1346    case ID: \
1347      Opts.Sanitize.ID = true; \
1348      break;
1349#include "clang/Basic/Sanitizers.def"
1350
1351    case Unknown:
1352      Diags.Report(diag::err_drv_invalid_value)
1353        << "-fsanitize=" << Sanitizers[I];
1354      break;
1355    }
1356  }
1357}
1358
1359static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1360                                  FileManager &FileMgr,
1361                                  DiagnosticsEngine &Diags) {
1362  using namespace options;
1363  Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1364  Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1365  if (const Arg *A = Args.getLastArg(OPT_token_cache))
1366      Opts.TokenCache = A->getValue();
1367  else
1368    Opts.TokenCache = Opts.ImplicitPTHInclude;
1369  Opts.UsePredefines = !Args.hasArg(OPT_undef);
1370  Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1371  Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1372
1373  Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
1374  for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
1375         ie = Args.filtered_end(); it != ie; ++it) {
1376    const Arg *A = *it;
1377    Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
1378  }
1379
1380  if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1381    StringRef Value(A->getValue());
1382    size_t Comma = Value.find(',');
1383    unsigned Bytes = 0;
1384    unsigned EndOfLine = 0;
1385
1386    if (Comma == StringRef::npos ||
1387        Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1388        Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1389      Diags.Report(diag::err_drv_preamble_format);
1390    else {
1391      Opts.PrecompiledPreambleBytes.first = Bytes;
1392      Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1393    }
1394  }
1395
1396  // Add macros from the command line.
1397  for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1398         ie = Args.filtered_end(); it != ie; ++it) {
1399    if ((*it)->getOption().matches(OPT_D))
1400      Opts.addMacroDef((*it)->getValue());
1401    else
1402      Opts.addMacroUndef((*it)->getValue());
1403  }
1404
1405  Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1406
1407  // Add the ordered list of -includes.
1408  for (arg_iterator it = Args.filtered_begin(OPT_include),
1409         ie = Args.filtered_end(); it != ie; ++it) {
1410    const Arg *A = *it;
1411    Opts.Includes.push_back(A->getValue());
1412  }
1413
1414  for (arg_iterator it = Args.filtered_begin(OPT_chain_include),
1415         ie = Args.filtered_end(); it != ie; ++it) {
1416    const Arg *A = *it;
1417    Opts.ChainedIncludes.push_back(A->getValue());
1418  }
1419
1420  // Include 'altivec.h' if -faltivec option present
1421  if (Args.hasArg(OPT_faltivec))
1422    Opts.Includes.push_back("altivec.h");
1423
1424  for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1425         ie = Args.filtered_end(); it != ie; ++it) {
1426    const Arg *A = *it;
1427    std::pair<StringRef,StringRef> Split =
1428      StringRef(A->getValue()).split(';');
1429
1430    if (Split.second.empty()) {
1431      Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1432      continue;
1433    }
1434
1435    Opts.addRemappedFile(Split.first, Split.second);
1436  }
1437
1438  if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
1439    StringRef Name = A->getValue();
1440    unsigned Library = llvm::StringSwitch<unsigned>(Name)
1441      .Case("libc++", ARCXX_libcxx)
1442      .Case("libstdc++", ARCXX_libstdcxx)
1443      .Case("none", ARCXX_nolib)
1444      .Default(~0U);
1445    if (Library == ~0U)
1446      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1447    else
1448      Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
1449  }
1450}
1451
1452static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1453                                        ArgList &Args,
1454                                        frontend::ActionKind Action) {
1455  using namespace options;
1456
1457  switch (Action) {
1458  case frontend::ASTDeclList:
1459  case frontend::ASTDump:
1460  case frontend::ASTDumpXML:
1461  case frontend::ASTPrint:
1462  case frontend::ASTView:
1463  case frontend::EmitAssembly:
1464  case frontend::EmitBC:
1465  case frontend::EmitHTML:
1466  case frontend::EmitLLVM:
1467  case frontend::EmitLLVMOnly:
1468  case frontend::EmitCodeGenOnly:
1469  case frontend::EmitObj:
1470  case frontend::FixIt:
1471  case frontend::GenerateModule:
1472  case frontend::GeneratePCH:
1473  case frontend::GeneratePTH:
1474  case frontend::ParseSyntaxOnly:
1475  case frontend::ModuleFileInfo:
1476  case frontend::PluginAction:
1477  case frontend::PrintDeclContext:
1478  case frontend::RewriteObjC:
1479  case frontend::RewriteTest:
1480  case frontend::RunAnalysis:
1481  case frontend::MigrateSource:
1482    Opts.ShowCPP = 0;
1483    break;
1484
1485  case frontend::DumpRawTokens:
1486  case frontend::DumpTokens:
1487  case frontend::InitOnly:
1488  case frontend::PrintPreamble:
1489  case frontend::PrintPreprocessedInput:
1490  case frontend::RewriteMacros:
1491  case frontend::RunPreprocessorOnly:
1492    Opts.ShowCPP = !Args.hasArg(OPT_dM);
1493    break;
1494  }
1495
1496  Opts.ShowComments = Args.hasArg(OPT_C);
1497  Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1498  Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1499  Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1500  Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
1501}
1502
1503static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1504  using namespace options;
1505  Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1506  Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
1507  Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1508  Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
1509  Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1510  Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1511
1512  // Use the default target triple if unspecified.
1513  if (Opts.Triple.empty())
1514    Opts.Triple = llvm::sys::getDefaultTargetTriple();
1515}
1516
1517//
1518
1519bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1520                                        const char *const *ArgBegin,
1521                                        const char *const *ArgEnd,
1522                                        DiagnosticsEngine &Diags) {
1523  bool Success = true;
1524
1525  // Parse the arguments.
1526  OwningPtr<OptTable> Opts(createDriverOptTable());
1527  unsigned MissingArgIndex, MissingArgCount;
1528  OwningPtr<InputArgList> Args(
1529    Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1530
1531  // Check for missing argument error.
1532  if (MissingArgCount) {
1533    Diags.Report(diag::err_drv_missing_argument)
1534      << Args->getArgString(MissingArgIndex) << MissingArgCount;
1535    Success = false;
1536  }
1537
1538  // Issue errors on unknown arguments.
1539  for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1540         ie = Args->filtered_end(); it != ie; ++it) {
1541    Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
1542    Success = false;
1543  }
1544
1545  // Issue errors on arguments that are not valid for CC1.
1546  for (ArgList::iterator I = Args->begin(), E = Args->end();
1547       I != E; ++I) {
1548    if (!(*I)->getOption().hasFlag(options::CC1Option)) {
1549      Diags.Report(diag::err_drv_unknown_argument) << (*I)->getAsString(*Args);
1550      Success = false;
1551    }
1552  }
1553
1554  Success = ParseAnalyzerArgs(*Res.getAnalyzerOpts(), *Args, Diags) && Success;
1555  Success = ParseMigratorArgs(Res.getMigratorOpts(), *Args) && Success;
1556  ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1557  Success = ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, &Diags)
1558            && Success;
1559  ParseCommentArgs(Res.getLangOpts()->CommentOpts, *Args);
1560  ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
1561  // FIXME: We shouldn't have to pass the DashX option around here
1562  InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1563  Success = ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags)
1564            && Success;
1565  ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1566  if (DashX != IK_AST && DashX != IK_LLVM_IR) {
1567    ParseLangArgs(*Res.getLangOpts(), *Args, DashX, Diags);
1568    if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
1569      Res.getLangOpts()->ObjCExceptions = 1;
1570  }
1571  // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
1572  // PCH file and find the original header name. Remove the need to do that in
1573  // ParsePreprocessorArgs and remove the FileManager
1574  // parameters from the function and the "FileManager.h" #include.
1575  FileManager FileMgr(Res.getFileSystemOpts());
1576  ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
1577  ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args,
1578                              Res.getFrontendOpts().ProgramAction);
1579  ParseTargetArgs(Res.getTargetOpts(), *Args);
1580
1581  return Success;
1582}
1583
1584namespace {
1585
1586  class ModuleSignature {
1587    SmallVector<uint64_t, 16> Data;
1588    unsigned CurBit;
1589    uint64_t CurValue;
1590
1591  public:
1592    ModuleSignature() : CurBit(0), CurValue(0) { }
1593
1594    void add(uint64_t Value, unsigned Bits);
1595    void add(StringRef Value);
1596    void flush();
1597
1598    llvm::APInt getAsInteger() const;
1599  };
1600}
1601
1602void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
1603  CurValue |= Value << CurBit;
1604  if (CurBit + NumBits < 64) {
1605    CurBit += NumBits;
1606    return;
1607  }
1608
1609  // Add the current word.
1610  Data.push_back(CurValue);
1611
1612  if (CurBit)
1613    CurValue = Value >> (64-CurBit);
1614  else
1615    CurValue = 0;
1616  CurBit = (CurBit+NumBits) & 63;
1617}
1618
1619void ModuleSignature::flush() {
1620  if (CurBit == 0)
1621    return;
1622
1623  Data.push_back(CurValue);
1624  CurBit = 0;
1625  CurValue = 0;
1626}
1627
1628void ModuleSignature::add(StringRef Value) {
1629  for (StringRef::iterator I = Value.begin(), IEnd = Value.end(); I != IEnd;++I)
1630    add(*I, 8);
1631}
1632
1633llvm::APInt ModuleSignature::getAsInteger() const {
1634  return llvm::APInt(Data.size() * 64, Data);
1635}
1636
1637std::string CompilerInvocation::getModuleHash() const {
1638  // Note: For QoI reasons, the things we use as a hash here should all be
1639  // dumped via the -module-info flag.
1640  using llvm::hash_code;
1641  using llvm::hash_value;
1642  using llvm::hash_combine;
1643
1644  // Start the signature with the compiler version.
1645  // FIXME: We'd rather use something more cryptographically sound than
1646  // CityHash, but this will do for now.
1647  hash_code code = hash_value(getClangFullRepositoryVersion());
1648
1649  // Extend the signature with the language options
1650#define LANGOPT(Name, Bits, Default, Description) \
1651   code = hash_combine(code, LangOpts->Name);
1652#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
1653  code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
1654#define BENIGN_LANGOPT(Name, Bits, Default, Description)
1655#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
1656#include "clang/Basic/LangOptions.def"
1657
1658  // Extend the signature with the target options.
1659  code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
1660                      TargetOpts->ABI, TargetOpts->CXXABI,
1661                      TargetOpts->LinkerVersion);
1662  for (unsigned i = 0, n = TargetOpts->FeaturesAsWritten.size(); i != n; ++i)
1663    code = hash_combine(code, TargetOpts->FeaturesAsWritten[i]);
1664
1665  // Extend the signature with preprocessor options.
1666  const PreprocessorOptions &ppOpts = getPreprocessorOpts();
1667  const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
1668  code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
1669
1670  std::vector<StringRef> MacroDefs;
1671  for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
1672            I = getPreprocessorOpts().Macros.begin(),
1673         IEnd = getPreprocessorOpts().Macros.end();
1674       I != IEnd; ++I) {
1675    // If we're supposed to ignore this macro for the purposes of modules,
1676    // don't put it into the hash.
1677    if (!hsOpts.ModulesIgnoreMacros.empty()) {
1678      // Check whether we're ignoring this macro.
1679      StringRef MacroDef = I->first;
1680      if (hsOpts.ModulesIgnoreMacros.count(MacroDef.split('=').first))
1681        continue;
1682    }
1683
1684    code = hash_combine(code, I->first, I->second);
1685  }
1686
1687  // Extend the signature with the sysroot.
1688  code = hash_combine(code, hsOpts.Sysroot, hsOpts.UseBuiltinIncludes,
1689                      hsOpts.UseStandardSystemIncludes,
1690                      hsOpts.UseStandardCXXIncludes,
1691                      hsOpts.UseLibcxx);
1692
1693#ifdef __APPLE__
1694  // Darwin-specific hack: if we have a sysroot, use the contents and
1695  // modification time of
1696  //   $sysroot/System/Library/CoreServices/SystemVersion.plist
1697  // as part of the module hash.
1698  if (!hsOpts.Sysroot.empty()) {
1699    llvm::OwningPtr<llvm::MemoryBuffer> buffer;
1700    SmallString<128> systemVersionFile;
1701    systemVersionFile += hsOpts.Sysroot;
1702    llvm::sys::path::append(systemVersionFile, "System");
1703    llvm::sys::path::append(systemVersionFile, "Library");
1704    llvm::sys::path::append(systemVersionFile, "CoreServices");
1705    llvm::sys::path::append(systemVersionFile, "SystemVersion.plist");
1706    if (!llvm::MemoryBuffer::getFile(systemVersionFile, buffer)) {
1707      code = hash_combine(code, buffer.get()->getBuffer());
1708
1709      struct stat statBuf;
1710      if (stat(systemVersionFile.c_str(), &statBuf) == 0)
1711        code = hash_combine(code, statBuf.st_mtime);
1712    }
1713  }
1714#endif
1715
1716  return llvm::APInt(64, code).toString(36, /*Signed=*/false);
1717}
1718