CompilerInvocation.cpp revision 263508 
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/DriverDiagnostic.h"
15#include "clang/Driver/Options.h"
16#include "clang/Driver/Util.h"
17#include "clang/Frontend/LangStandard.h"
18#include "clang/Frontend/Utils.h"
19#include "clang/Lex/HeaderSearchOptions.h"
20#include "clang/Serialization/ASTReader.h"
21#include "llvm/ADT/Hashing.h"
22#include "llvm/ADT/OwningPtr.h"
23#include "llvm/ADT/SmallVector.h"
24#include "llvm/ADT/StringExtras.h"
25#include "llvm/ADT/StringSwitch.h"
26#include "llvm/ADT/Triple.h"
27#include "llvm/Option/Arg.h"
28#include "llvm/Option/ArgList.h"
29#include "llvm/Option/OptTable.h"
30#include "llvm/Option/Option.h"
31#include "llvm/Support/ErrorHandling.h"
32#include "llvm/Support/FileSystem.h"
33#include "llvm/Support/Host.h"
34#include "llvm/Support/Path.h"
35#include "llvm/Support/Process.h"
36#include "llvm/Support/system_error.h"
37#include <sys/stat.h>
38using namespace clang;
39
40//===----------------------------------------------------------------------===//
41// Initialization.
42//===----------------------------------------------------------------------===//
43
44CompilerInvocationBase::CompilerInvocationBase()
45  : LangOpts(new LangOptions()), TargetOpts(new TargetOptions()),
46    DiagnosticOpts(new DiagnosticOptions()),
47    HeaderSearchOpts(new HeaderSearchOptions()),
48    PreprocessorOpts(new PreprocessorOptions()) {}
49
50CompilerInvocationBase::CompilerInvocationBase(const CompilerInvocationBase &X)
51  : RefCountedBase<CompilerInvocation>(),
52    LangOpts(new LangOptions(*X.getLangOpts())),
53    TargetOpts(new TargetOptions(X.getTargetOpts())),
54    DiagnosticOpts(new DiagnosticOptions(X.getDiagnosticOpts())),
55    HeaderSearchOpts(new HeaderSearchOptions(X.getHeaderSearchOpts())),
56    PreprocessorOpts(new PreprocessorOptions(X.getPreprocessorOpts())) {}
57
58//===----------------------------------------------------------------------===//
59// Deserialization (from args)
60//===----------------------------------------------------------------------===//
61
62using namespace clang::driver;
63using namespace clang::driver::options;
64using namespace llvm::opt;
65
66//
67
68static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
69                                     DiagnosticsEngine &Diags) {
70  unsigned DefaultOpt = 0;
71  if (IK == IK_OpenCL && !Args.hasArg(OPT_cl_opt_disable))
72    DefaultOpt = 2;
73
74  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
75    if (A->getOption().matches(options::OPT_O0))
76      return 0;
77
78    if (A->getOption().matches(options::OPT_Ofast))
79      return 3;
80
81    assert (A->getOption().matches(options::OPT_O));
82
83    StringRef S(A->getValue());
84    if (S == "s" || S == "z" || S.empty())
85      return 2;
86
87    return getLastArgIntValue(Args, OPT_O, DefaultOpt, Diags);
88  }
89
90  return DefaultOpt;
91}
92
93static unsigned getOptimizationLevelSize(ArgList &Args) {
94  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
95    if (A->getOption().matches(options::OPT_O)) {
96      switch (A->getValue()[0]) {
97      default:
98        return 0;
99      case 's':
100        return 1;
101      case 'z':
102        return 2;
103      }
104    }
105  }
106  return 0;
107}
108
109static void addWarningArgs(ArgList &Args, std::vector<std::string> &Warnings) {
110  for (arg_iterator I = Args.filtered_begin(OPT_W_Group),
111         E = Args.filtered_end(); I != E; ++I) {
112    Arg *A = *I;
113    // If the argument is a pure flag, add its name (minus the "W" at the beginning)
114    // to the warning list. Else, add its value (for the OPT_W case).
115    if (A->getOption().getKind() == Option::FlagClass) {
116      Warnings.push_back(A->getOption().getName().substr(1));
117    } else {
118      for (unsigned Idx = 0, End = A->getNumValues();
119           Idx < End; ++Idx) {
120        StringRef V = A->getValue(Idx);
121        // "-Wl," and such are not warning options.
122        // FIXME: Should be handled by putting these in separate flags.
123        if (V.startswith("l,") || V.startswith("a,") || V.startswith("p,"))
124          continue;
125
126        Warnings.push_back(V);
127      }
128    }
129  }
130}
131
132static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
133                              DiagnosticsEngine &Diags) {
134  using namespace options;
135  bool Success = true;
136  if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
137    StringRef Name = A->getValue();
138    AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
139#define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
140      .Case(CMDFLAG, NAME##Model)
141#include "clang/StaticAnalyzer/Core/Analyses.def"
142      .Default(NumStores);
143    if (Value == NumStores) {
144      Diags.Report(diag::err_drv_invalid_value)
145        << A->getAsString(Args) << Name;
146      Success = false;
147    } else {
148      Opts.AnalysisStoreOpt = Value;
149    }
150  }
151
152  if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
153    StringRef Name = A->getValue();
154    AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
155#define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
156      .Case(CMDFLAG, NAME##Model)
157#include "clang/StaticAnalyzer/Core/Analyses.def"
158      .Default(NumConstraints);
159    if (Value == NumConstraints) {
160      Diags.Report(diag::err_drv_invalid_value)
161        << A->getAsString(Args) << Name;
162      Success = false;
163    } else {
164      Opts.AnalysisConstraintsOpt = Value;
165    }
166  }
167
168  if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
169    StringRef Name = A->getValue();
170    AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
171#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN) \
172      .Case(CMDFLAG, PD_##NAME)
173#include "clang/StaticAnalyzer/Core/Analyses.def"
174      .Default(NUM_ANALYSIS_DIAG_CLIENTS);
175    if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
176      Diags.Report(diag::err_drv_invalid_value)
177        << A->getAsString(Args) << Name;
178      Success = false;
179    } else {
180      Opts.AnalysisDiagOpt = Value;
181    }
182  }
183
184  if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
185    StringRef Name = A->getValue();
186    AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
187#define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
188      .Case(CMDFLAG, NAME)
189#include "clang/StaticAnalyzer/Core/Analyses.def"
190      .Default(NumPurgeModes);
191    if (Value == NumPurgeModes) {
192      Diags.Report(diag::err_drv_invalid_value)
193        << A->getAsString(Args) << Name;
194      Success = false;
195    } else {
196      Opts.AnalysisPurgeOpt = Value;
197    }
198  }
199
200  if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
201    StringRef Name = A->getValue();
202    AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
203#define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
204      .Case(CMDFLAG, NAME)
205#include "clang/StaticAnalyzer/Core/Analyses.def"
206      .Default(NumInliningModes);
207    if (Value == NumInliningModes) {
208      Diags.Report(diag::err_drv_invalid_value)
209        << A->getAsString(Args) << Name;
210      Success = false;
211    } else {
212      Opts.InliningMode = Value;
213    }
214  }
215
216  Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
217  Opts.visualizeExplodedGraphWithGraphViz =
218    Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
219  Opts.visualizeExplodedGraphWithUbiGraph =
220    Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
221  Opts.NoRetryExhausted = Args.hasArg(OPT_analyzer_disable_retry_exhausted);
222  Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
223  Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
224  Opts.AnalyzeNestedBlocks =
225    Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
226  Opts.eagerlyAssumeBinOpBifurcation = Args.hasArg(OPT_analyzer_eagerly_assume);
227  Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
228  Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
229  Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
230  Opts.maxBlockVisitOnPath =
231      getLastArgIntValue(Args, OPT_analyzer_max_loop, 4, Diags);
232  Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
233  Opts.InlineMaxStackDepth =
234      getLastArgIntValue(Args, OPT_analyzer_inline_max_stack_depth,
235                         Opts.InlineMaxStackDepth, Diags);
236
237  Opts.CheckersControlList.clear();
238  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_checker,
239                                             OPT_analyzer_disable_checker),
240         ie = Args.filtered_end(); it != ie; ++it) {
241    const Arg *A = *it;
242    A->claim();
243    bool enable = (A->getOption().getID() == OPT_analyzer_checker);
244    // We can have a list of comma separated checker names, e.g:
245    // '-analyzer-checker=cocoa,unix'
246    StringRef checkerList = A->getValue();
247    SmallVector<StringRef, 4> checkers;
248    checkerList.split(checkers, ",");
249    for (unsigned i = 0, e = checkers.size(); i != e; ++i)
250      Opts.CheckersControlList.push_back(std::make_pair(checkers[i], enable));
251  }
252
253  // Go through the analyzer configuration options.
254  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_config),
255       ie = Args.filtered_end(); it != ie; ++it) {
256    const Arg *A = *it;
257    A->claim();
258    // We can have a list of comma separated config names, e.g:
259    // '-analyzer-config key1=val1,key2=val2'
260    StringRef configList = A->getValue();
261    SmallVector<StringRef, 4> configVals;
262    configList.split(configVals, ",");
263    for (unsigned i = 0, e = configVals.size(); i != e; ++i) {
264      StringRef key, val;
265      llvm::tie(key, val) = configVals[i].split("=");
266      if (val.empty()) {
267        Diags.Report(SourceLocation(),
268                     diag::err_analyzer_config_no_value) << configVals[i];
269        Success = false;
270        break;
271      }
272      if (val.find('=') != StringRef::npos) {
273        Diags.Report(SourceLocation(),
274                     diag::err_analyzer_config_multiple_values)
275          << configVals[i];
276        Success = false;
277        break;
278      }
279      Opts.Config[key] = val;
280    }
281  }
282
283  return Success;
284}
285
286static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
287  Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
288  Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
289  return true;
290}
291
292static void ParseCommentArgs(CommentOptions &Opts, ArgList &Args) {
293  Opts.BlockCommandNames = Args.getAllArgValues(OPT_fcomment_block_commands);
294  Opts.ParseAllComments = Args.hasArg(OPT_fparse_all_comments);
295}
296
297static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
298                             DiagnosticsEngine &Diags) {
299  using namespace options;
300  bool Success = true;
301
302  Opts.OptimizationLevel = getOptimizationLevel(Args, IK, Diags);
303  // TODO: This could be done in Driver
304  unsigned MaxOptLevel = 3;
305  if (Opts.OptimizationLevel > MaxOptLevel) {
306    // If the optimization level is not supported, fall back on the default optimization
307    Diags.Report(diag::warn_drv_optimization_value)
308        << Args.getLastArg(OPT_O)->getAsString(Args) << "-O" << MaxOptLevel;
309    Opts.OptimizationLevel = MaxOptLevel;
310  }
311
312  // We must always run at least the always inlining pass.
313  Opts.setInlining(
314    (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
315                                 : CodeGenOptions::OnlyAlwaysInlining);
316  // -fno-inline-functions overrides OptimizationLevel > 1.
317  Opts.NoInline = Args.hasArg(OPT_fno_inline);
318  Opts.setInlining(Args.hasArg(OPT_fno_inline_functions) ?
319                     CodeGenOptions::OnlyAlwaysInlining : Opts.getInlining());
320
321  if (Args.hasArg(OPT_gline_tables_only)) {
322    Opts.setDebugInfo(CodeGenOptions::DebugLineTablesOnly);
323  } else if (Args.hasArg(OPT_g_Flag) || Args.hasArg(OPT_gdwarf_2) ||
324             Args.hasArg(OPT_gdwarf_3) || Args.hasArg(OPT_gdwarf_4)) {
325    if (Args.hasFlag(OPT_flimit_debug_info, OPT_fno_limit_debug_info, true))
326      Opts.setDebugInfo(CodeGenOptions::LimitedDebugInfo);
327    else
328      Opts.setDebugInfo(CodeGenOptions::FullDebugInfo);
329  }
330  Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
331  Opts.SplitDwarfFile = Args.getLastArgValue(OPT_split_dwarf_file);
332  if (Args.hasArg(OPT_gdwarf_2))
333    Opts.DwarfVersion = 2;
334  else if (Args.hasArg(OPT_gdwarf_3))
335    Opts.DwarfVersion = 3;
336  else if (Args.hasArg(OPT_gdwarf_4))
337    Opts.DwarfVersion = 4;
338  else if (Opts.getDebugInfo() != CodeGenOptions::NoDebugInfo)
339    // Default Dwarf version is 4 if we are generating debug information.
340    Opts.DwarfVersion = 4;
341
342  Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
343  Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
344  Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
345  Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
346    OPT_fuse_register_sized_bitfield_access);
347  Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
348  Opts.StructPathTBAA = !Args.hasArg(OPT_no_struct_path_tbaa);
349  Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
350  Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
351  Opts.NoCommon = Args.hasArg(OPT_fno_common);
352  Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
353  Opts.OptimizeSize = getOptimizationLevelSize(Args);
354  Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
355                            Args.hasArg(OPT_ffreestanding));
356  Opts.UnrollLoops =
357      Args.hasFlag(OPT_funroll_loops, OPT_fno_unroll_loops,
358                   (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize));
359  Opts.RerollLoops = Args.hasArg(OPT_freroll_loops);
360
361  Opts.Autolink = !Args.hasArg(OPT_fno_autolink);
362  Opts.SampleProfileFile = Args.getLastArgValue(OPT_fprofile_sample_use_EQ);
363  Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
364  Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
365  Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);
366  Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
367  Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
368  Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
369  Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
370  Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
371  Opts.DisableFree = Args.hasArg(OPT_disable_free);
372  Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
373  Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
374  Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
375  Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
376  Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
377  Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
378                       Args.hasArg(OPT_cl_finite_math_only)||
379                       Args.hasArg(OPT_cl_fast_relaxed_math));
380  Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
381                       Args.hasArg(OPT_cl_finite_math_only)||
382                       Args.hasArg(OPT_cl_fast_relaxed_math));
383  Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
384  Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
385  Opts.NumRegisterParameters = getLastArgIntValue(Args, OPT_mregparm, 0, Diags);
386  Opts.NoGlobalMerge = Args.hasArg(OPT_mno_global_merge);
387  Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
388  Opts.EnableSegmentedStacks = Args.hasArg(OPT_split_stacks);
389  Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
390  Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
391  Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
392  Opts.NoDwarf2CFIAsm = Args.hasArg(OPT_fno_dwarf2_cfi_asm);
393  Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
394  Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
395  Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
396  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
397                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
398                      Args.hasArg(OPT_cl_fast_relaxed_math);
399  Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
400  Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
401  Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
402  Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
403
404  Opts.FunctionSections = Args.hasFlag(OPT_ffunction_sections,
405                                       OPT_fno_function_sections, false);
406  Opts.DataSections = Args.hasFlag(OPT_fdata_sections,
407                                   OPT_fno_data_sections, false);
408
409  Opts.VectorizeBB = Args.hasArg(OPT_vectorize_slp_aggressive);
410  Opts.VectorizeLoop = Args.hasArg(OPT_vectorize_loops);
411  Opts.VectorizeSLP = Args.hasArg(OPT_vectorize_slp);
412
413  Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
414  Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
415  Opts.SanitizeRecover = !Args.hasArg(OPT_fno_sanitize_recover);
416
417  Opts.DisableGCov = Args.hasArg(OPT_test_coverage);
418  Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
419  Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
420  if (Opts.EmitGcovArcs || Opts.EmitGcovNotes) {
421  Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
422    Opts.CoverageExtraChecksum = Args.hasArg(OPT_coverage_cfg_checksum);
423    Opts.CoverageNoFunctionNamesInData =
424        Args.hasArg(OPT_coverage_no_function_names_in_data);
425    if (Args.hasArg(OPT_coverage_version_EQ)) {
426      StringRef CoverageVersion = Args.getLastArgValue(OPT_coverage_version_EQ);
427      if (CoverageVersion.size() != 4) {
428        Diags.Report(diag::err_drv_invalid_value)
429            << Args.getLastArg(OPT_coverage_version_EQ)->getAsString(Args)
430            << CoverageVersion;
431      } else {
432        memcpy(Opts.CoverageVersion, CoverageVersion.data(), 4);
433      }
434    }
435  }
436
437  Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
438  Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
439  Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
440  Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
441  Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
442  Opts.SanitizerBlacklistFile = Args.getLastArgValue(OPT_fsanitize_blacklist);
443  Opts.SanitizeMemoryTrackOrigins =
444    Args.hasArg(OPT_fsanitize_memory_track_origins);
445  Opts.SanitizeAddressZeroBaseShadow =
446    Args.hasArg(OPT_fsanitize_address_zero_base_shadow);
447  Opts.SanitizeUndefinedTrapOnError =
448    Args.hasArg(OPT_fsanitize_undefined_trap_on_error);
449  Opts.SSPBufferSize =
450      getLastArgIntValue(Args, OPT_stack_protector_buffer_size, 8, Diags);
451  Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
452  if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
453    StringRef Val = A->getValue();
454    unsigned StackAlignment = Opts.StackAlignment;
455    Val.getAsInteger(10, StackAlignment);
456    Opts.StackAlignment = StackAlignment;
457  }
458
459  if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
460    StringRef Name = A->getValue();
461    unsigned Method = llvm::StringSwitch<unsigned>(Name)
462      .Case("legacy", CodeGenOptions::Legacy)
463      .Case("non-legacy", CodeGenOptions::NonLegacy)
464      .Case("mixed", CodeGenOptions::Mixed)
465      .Default(~0U);
466    if (Method == ~0U) {
467      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
468      Success = false;
469    } else {
470      Opts.setObjCDispatchMethod(
471        static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
472    }
473  }
474
475  if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
476    StringRef Name = A->getValue();
477    unsigned Model = llvm::StringSwitch<unsigned>(Name)
478        .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
479        .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
480        .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
481        .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
482        .Default(~0U);
483    if (Model == ~0U) {
484      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
485      Success = false;
486    } else {
487      Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
488    }
489  }
490
491  if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
492    StringRef Val = A->getValue();
493    if (Val == "fast")
494      Opts.setFPContractMode(CodeGenOptions::FPC_Fast);
495    else if (Val == "on")
496      Opts.setFPContractMode(CodeGenOptions::FPC_On);
497    else if (Val == "off")
498      Opts.setFPContractMode(CodeGenOptions::FPC_Off);
499    else
500      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
501  }
502
503  if (Arg *A = Args.getLastArg(OPT_fpcc_struct_return, OPT_freg_struct_return)) {
504    if (A->getOption().matches(OPT_fpcc_struct_return)) {
505      Opts.setStructReturnConvention(CodeGenOptions::SRCK_OnStack);
506    } else {
507      assert(A->getOption().matches(OPT_freg_struct_return));
508      Opts.setStructReturnConvention(CodeGenOptions::SRCK_InRegs);
509    }
510  }
511
512  Opts.DependentLibraries = Args.getAllArgValues(OPT_dependent_lib);
513
514  return Success;
515}
516
517static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
518                                      ArgList &Args) {
519  using namespace options;
520  Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
521  Opts.Targets = Args.getAllArgValues(OPT_MT);
522  Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
523  Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
524  Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
525  Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
526  Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
527  Opts.PrintShowIncludes = Args.hasArg(OPT_show_includes);
528  Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
529}
530
531bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
532                                DiagnosticsEngine *Diags) {
533  using namespace options;
534  bool Success = true;
535
536  Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
537  Opts.DiagnosticSerializationFile =
538    Args.getLastArgValue(OPT_diagnostic_serialized_file);
539  Opts.IgnoreWarnings = Args.hasArg(OPT_w);
540  Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
541  Opts.Pedantic = Args.hasArg(OPT_pedantic);
542  Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
543  Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
544  Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
545  Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
546                                 OPT_fno_show_column,
547                                 /*Default=*/true);
548  Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
549  Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
550  Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
551
552  llvm::sys::Process::UseANSIEscapeCodes(Args.hasArg(OPT_fansi_escape_codes));
553
554  // Default behavior is to not to show note include stacks.
555  Opts.ShowNoteIncludeStack = false;
556  if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
557                               OPT_fno_diagnostics_show_note_include_stack))
558    if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
559      Opts.ShowNoteIncludeStack = true;
560
561  StringRef ShowOverloads =
562    Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
563  if (ShowOverloads == "best")
564    Opts.setShowOverloads(Ovl_Best);
565  else if (ShowOverloads == "all")
566    Opts.setShowOverloads(Ovl_All);
567  else {
568    Success = false;
569    if (Diags)
570      Diags->Report(diag::err_drv_invalid_value)
571      << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
572      << ShowOverloads;
573  }
574
575  StringRef ShowCategory =
576    Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
577  if (ShowCategory == "none")
578    Opts.ShowCategories = 0;
579  else if (ShowCategory == "id")
580    Opts.ShowCategories = 1;
581  else if (ShowCategory == "name")
582    Opts.ShowCategories = 2;
583  else {
584    Success = false;
585    if (Diags)
586      Diags->Report(diag::err_drv_invalid_value)
587      << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
588      << ShowCategory;
589  }
590
591  StringRef Format =
592    Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
593  if (Format == "clang")
594    Opts.setFormat(DiagnosticOptions::Clang);
595  else if (Format == "msvc")
596    Opts.setFormat(DiagnosticOptions::Msvc);
597  else if (Format == "msvc-fallback") {
598    Opts.setFormat(DiagnosticOptions::Msvc);
599    Opts.CLFallbackMode = true;
600  } else if (Format == "vi")
601    Opts.setFormat(DiagnosticOptions::Vi);
602  else {
603    Success = false;
604    if (Diags)
605      Diags->Report(diag::err_drv_invalid_value)
606      << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
607      << Format;
608  }
609
610  Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
611  Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
612  Opts.ShowPresumedLoc = !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
613  Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
614  Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
615  Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
616  Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
617  Opts.MacroBacktraceLimit =
618      getLastArgIntValue(Args, OPT_fmacro_backtrace_limit,
619                         DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
620  Opts.TemplateBacktraceLimit = getLastArgIntValue(
621      Args, OPT_ftemplate_backtrace_limit,
622      DiagnosticOptions::DefaultTemplateBacktraceLimit, Diags);
623  Opts.ConstexprBacktraceLimit = getLastArgIntValue(
624      Args, OPT_fconstexpr_backtrace_limit,
625      DiagnosticOptions::DefaultConstexprBacktraceLimit, Diags);
626  Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
627                                    DiagnosticOptions::DefaultTabStop, Diags);
628  if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
629    Opts.TabStop = DiagnosticOptions::DefaultTabStop;
630    if (Diags)
631      Diags->Report(diag::warn_ignoring_ftabstop_value)
632      << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
633  }
634  Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
635  addWarningArgs(Args, Opts.Warnings);
636
637  return Success;
638}
639
640static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
641  Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
642}
643
644static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
645                                   DiagnosticsEngine &Diags) {
646  using namespace options;
647  Opts.ProgramAction = frontend::ParseSyntaxOnly;
648  if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
649    switch (A->getOption().getID()) {
650    default:
651      llvm_unreachable("Invalid option in group!");
652    case OPT_ast_list:
653      Opts.ProgramAction = frontend::ASTDeclList; break;
654    case OPT_ast_dump:
655      Opts.ProgramAction = frontend::ASTDump; break;
656    case OPT_ast_print:
657      Opts.ProgramAction = frontend::ASTPrint; break;
658    case OPT_ast_view:
659      Opts.ProgramAction = frontend::ASTView; break;
660    case OPT_dump_raw_tokens:
661      Opts.ProgramAction = frontend::DumpRawTokens; break;
662    case OPT_dump_tokens:
663      Opts.ProgramAction = frontend::DumpTokens; break;
664    case OPT_S:
665      Opts.ProgramAction = frontend::EmitAssembly; break;
666    case OPT_emit_llvm_bc:
667      Opts.ProgramAction = frontend::EmitBC; break;
668    case OPT_emit_html:
669      Opts.ProgramAction = frontend::EmitHTML; break;
670    case OPT_emit_llvm:
671      Opts.ProgramAction = frontend::EmitLLVM; break;
672    case OPT_emit_llvm_only:
673      Opts.ProgramAction = frontend::EmitLLVMOnly; break;
674    case OPT_emit_codegen_only:
675      Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
676    case OPT_emit_obj:
677      Opts.ProgramAction = frontend::EmitObj; break;
678    case OPT_fixit_EQ:
679      Opts.FixItSuffix = A->getValue();
680      // fall-through!
681    case OPT_fixit:
682      Opts.ProgramAction = frontend::FixIt; break;
683    case OPT_emit_module:
684      Opts.ProgramAction = frontend::GenerateModule; break;
685    case OPT_emit_pch:
686      Opts.ProgramAction = frontend::GeneratePCH; break;
687    case OPT_emit_pth:
688      Opts.ProgramAction = frontend::GeneratePTH; break;
689    case OPT_init_only:
690      Opts.ProgramAction = frontend::InitOnly; break;
691    case OPT_fsyntax_only:
692      Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
693    case OPT_module_file_info:
694      Opts.ProgramAction = frontend::ModuleFileInfo; break;
695    case OPT_print_decl_contexts:
696      Opts.ProgramAction = frontend::PrintDeclContext; break;
697    case OPT_print_preamble:
698      Opts.ProgramAction = frontend::PrintPreamble; break;
699    case OPT_E:
700      Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
701    case OPT_rewrite_macros:
702      Opts.ProgramAction = frontend::RewriteMacros; break;
703    case OPT_rewrite_objc:
704      Opts.ProgramAction = frontend::RewriteObjC; break;
705    case OPT_rewrite_test:
706      Opts.ProgramAction = frontend::RewriteTest; break;
707    case OPT_analyze:
708      Opts.ProgramAction = frontend::RunAnalysis; break;
709    case OPT_migrate:
710      Opts.ProgramAction = frontend::MigrateSource; break;
711    case OPT_Eonly:
712      Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
713    }
714  }
715
716  if (const Arg* A = Args.getLastArg(OPT_plugin)) {
717    Opts.Plugins.push_back(A->getValue(0));
718    Opts.ProgramAction = frontend::PluginAction;
719    Opts.ActionName = A->getValue();
720
721    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
722           end = Args.filtered_end(); it != end; ++it) {
723      if ((*it)->getValue(0) == Opts.ActionName)
724        Opts.PluginArgs.push_back((*it)->getValue(1));
725    }
726  }
727
728  Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
729  Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
730  for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
731    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
732           end = Args.filtered_end(); it != end; ++it) {
733      if ((*it)->getValue(0) == Opts.AddPluginActions[i])
734        Opts.AddPluginArgs[i].push_back((*it)->getValue(1));
735    }
736  }
737
738  if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
739    Opts.CodeCompletionAt =
740      ParsedSourceLocation::FromString(A->getValue());
741    if (Opts.CodeCompletionAt.FileName.empty())
742      Diags.Report(diag::err_drv_invalid_value)
743        << A->getAsString(Args) << A->getValue();
744  }
745  Opts.DisableFree = Args.hasArg(OPT_disable_free);
746
747  Opts.OutputFile = Args.getLastArgValue(OPT_o);
748  Opts.Plugins = Args.getAllArgValues(OPT_load);
749  Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
750  Opts.ShowHelp = Args.hasArg(OPT_help);
751  Opts.ShowStats = Args.hasArg(OPT_print_stats);
752  Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
753  Opts.ShowVersion = Args.hasArg(OPT_version);
754  Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
755  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
756  Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
757  Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
758  Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
759  Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
760  Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
761  Opts.ASTDumpLookups = Args.hasArg(OPT_ast_dump_lookups);
762  Opts.UseGlobalModuleIndex = !Args.hasArg(OPT_fno_modules_global_index);
763  Opts.GenerateGlobalModuleIndex = Opts.UseGlobalModuleIndex;
764
765  Opts.CodeCompleteOpts.IncludeMacros
766    = Args.hasArg(OPT_code_completion_macros);
767  Opts.CodeCompleteOpts.IncludeCodePatterns
768    = Args.hasArg(OPT_code_completion_patterns);
769  Opts.CodeCompleteOpts.IncludeGlobals
770    = !Args.hasArg(OPT_no_code_completion_globals);
771  Opts.CodeCompleteOpts.IncludeBriefComments
772    = Args.hasArg(OPT_code_completion_brief_comments);
773
774  Opts.OverrideRecordLayoutsFile
775    = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
776  if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
777                                     OPT_arcmt_modify,
778                                     OPT_arcmt_migrate)) {
779    switch (A->getOption().getID()) {
780    default:
781      llvm_unreachable("missed a case");
782    case OPT_arcmt_check:
783      Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
784      break;
785    case OPT_arcmt_modify:
786      Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
787      break;
788    case OPT_arcmt_migrate:
789      Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
790      break;
791    }
792  }
793  Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
794  Opts.ARCMTMigrateReportOut
795    = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
796  Opts.ARCMTMigrateEmitARCErrors
797    = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
798
799  if (Args.hasArg(OPT_objcmt_migrate_literals))
800    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
801  if (Args.hasArg(OPT_objcmt_migrate_subscripting))
802    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
803  if (Args.hasArg(OPT_objcmt_migrate_property))
804    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Property;
805  if (Args.hasArg(OPT_objcmt_migrate_readonly_property))
806    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadonlyProperty;
807  if (Args.hasArg(OPT_objcmt_migrate_readwrite_property))
808    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadwriteProperty;
809  if (Args.hasArg(OPT_objcmt_migrate_annotation))
810    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Annotation;
811  if (Args.hasArg(OPT_objcmt_returns_innerpointer_property))
812    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReturnsInnerPointerProperty;
813  if (Args.hasArg(OPT_objcmt_migrate_instancetype))
814    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Instancetype;
815  if (Args.hasArg(OPT_objcmt_migrate_nsmacros))
816    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsMacros;
817  if (Args.hasArg(OPT_objcmt_migrate_protocol_conformance))
818    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ProtocolConformance;
819  if (Args.hasArg(OPT_objcmt_atomic_property))
820    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_AtomicProperty;
821  if (Args.hasArg(OPT_objcmt_ns_nonatomic_iosonly))
822    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsAtomicIOSOnlyProperty;
823  if (Args.hasArg(OPT_objcmt_migrate_all))
824    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_MigrateDecls;
825
826  Opts.ObjCMTWhiteListPath = Args.getLastArgValue(OPT_objcmt_white_list_dir_path);
827
828  if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
829      Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
830    Diags.Report(diag::err_drv_argument_not_allowed_with)
831      << "ARC migration" << "ObjC migration";
832  }
833
834  InputKind DashX = IK_None;
835  if (const Arg *A = Args.getLastArg(OPT_x)) {
836    DashX = llvm::StringSwitch<InputKind>(A->getValue())
837      .Case("c", IK_C)
838      .Case("cl", IK_OpenCL)
839      .Case("cuda", IK_CUDA)
840      .Case("c++", IK_CXX)
841      .Case("objective-c", IK_ObjC)
842      .Case("objective-c++", IK_ObjCXX)
843      .Case("cpp-output", IK_PreprocessedC)
844      .Case("assembler-with-cpp", IK_Asm)
845      .Case("c++-cpp-output", IK_PreprocessedCXX)
846      .Case("objective-c-cpp-output", IK_PreprocessedObjC)
847      .Case("objc-cpp-output", IK_PreprocessedObjC)
848      .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
849      .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
850      .Case("c-header", IK_C)
851      .Case("cl-header", IK_OpenCL)
852      .Case("objective-c-header", IK_ObjC)
853      .Case("c++-header", IK_CXX)
854      .Case("objective-c++-header", IK_ObjCXX)
855      .Cases("ast", "pcm", IK_AST)
856      .Case("ir", IK_LLVM_IR)
857      .Default(IK_None);
858    if (DashX == IK_None)
859      Diags.Report(diag::err_drv_invalid_value)
860        << A->getAsString(Args) << A->getValue();
861  }
862
863  // '-' is the default input if none is given.
864  std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
865  Opts.Inputs.clear();
866  if (Inputs.empty())
867    Inputs.push_back("-");
868  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
869    InputKind IK = DashX;
870    if (IK == IK_None) {
871      IK = FrontendOptions::getInputKindForExtension(
872        StringRef(Inputs[i]).rsplit('.').second);
873      // FIXME: Remove this hack.
874      if (i == 0)
875        DashX = IK;
876    }
877    Opts.Inputs.push_back(FrontendInputFile(Inputs[i], IK));
878  }
879
880  return DashX;
881}
882
883std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
884                                                 void *MainAddr) {
885  SmallString<128> P(llvm::sys::fs::getMainExecutable(Argv0, MainAddr));
886
887  if (!P.empty()) {
888    llvm::sys::path::remove_filename(P); // Remove /clang from foo/bin/clang
889    llvm::sys::path::remove_filename(P); // Remove /bin   from foo/bin
890
891    // Get foo/lib/clang/<version>/include
892    llvm::sys::path::append(P, "lib", "clang", CLANG_VERSION_STRING);
893  }
894
895  return P.str();
896}
897
898static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
899  using namespace options;
900  Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
901  Opts.Verbose = Args.hasArg(OPT_v);
902  Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
903  Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
904  Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
905  if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
906    Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
907  Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
908  Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodules_cache_path);
909  Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
910  // -fmodules implies -fmodule-maps
911  Opts.ModuleMaps = Args.hasArg(OPT_fmodule_maps) || Args.hasArg(OPT_fmodules);
912  Opts.ModuleCachePruneInterval =
913      getLastArgIntValue(Args, OPT_fmodules_prune_interval, 7 * 24 * 60 * 60);
914  Opts.ModuleCachePruneAfter =
915      getLastArgIntValue(Args, OPT_fmodules_prune_after, 31 * 24 * 60 * 60);
916  for (arg_iterator it = Args.filtered_begin(OPT_fmodules_ignore_macro),
917                    ie = Args.filtered_end();
918       it != ie; ++it) {
919    StringRef MacroDef = (*it)->getValue();
920    Opts.ModulesIgnoreMacros.insert(MacroDef.split('=').first);
921  }
922  std::vector<std::string> ModuleMapFiles =
923      Args.getAllArgValues(OPT_fmodule_map_file);
924  Opts.ModuleMapFiles.insert(ModuleMapFiles.begin(), ModuleMapFiles.end());
925
926  // Add -I..., -F..., and -index-header-map options in order.
927  bool IsIndexHeaderMap = false;
928  for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F,
929                                             OPT_index_header_map),
930       ie = Args.filtered_end(); it != ie; ++it) {
931    if ((*it)->getOption().matches(OPT_index_header_map)) {
932      // -index-header-map applies to the next -I or -F.
933      IsIndexHeaderMap = true;
934      continue;
935    }
936
937    frontend::IncludeDirGroup Group
938      = IsIndexHeaderMap? frontend::IndexHeaderMap : frontend::Angled;
939
940    Opts.AddPath((*it)->getValue(), Group,
941                 /*IsFramework=*/ (*it)->getOption().matches(OPT_F), true);
942    IsIndexHeaderMap = false;
943  }
944
945  // Add -iprefix/-iwithprefix/-iwithprefixbefore options.
946  StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
947  for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
948                                             OPT_iwithprefixbefore),
949         ie = Args.filtered_end(); it != ie; ++it) {
950    const Arg *A = *it;
951    if (A->getOption().matches(OPT_iprefix))
952      Prefix = A->getValue();
953    else if (A->getOption().matches(OPT_iwithprefix))
954      Opts.AddPath(Prefix.str() + A->getValue(),
955                   frontend::After, false, true);
956    else
957      Opts.AddPath(Prefix.str() + A->getValue(),
958                   frontend::Angled, false, true);
959  }
960
961  for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
962         ie = Args.filtered_end(); it != ie; ++it)
963    Opts.AddPath((*it)->getValue(), frontend::After, false, true);
964  for (arg_iterator it = Args.filtered_begin(OPT_iquote),
965         ie = Args.filtered_end(); it != ie; ++it)
966    Opts.AddPath((*it)->getValue(), frontend::Quoted, false, true);
967  for (arg_iterator it = Args.filtered_begin(OPT_isystem,
968         OPT_iwithsysroot), ie = Args.filtered_end(); it != ie; ++it)
969    Opts.AddPath((*it)->getValue(), frontend::System, false,
970                 !(*it)->getOption().matches(OPT_iwithsysroot));
971  for (arg_iterator it = Args.filtered_begin(OPT_iframework),
972         ie = Args.filtered_end(); it != ie; ++it)
973    Opts.AddPath((*it)->getValue(), frontend::System, true, true);
974
975  // Add the paths for the various language specific isystem flags.
976  for (arg_iterator it = Args.filtered_begin(OPT_c_isystem),
977       ie = Args.filtered_end(); it != ie; ++it)
978    Opts.AddPath((*it)->getValue(), frontend::CSystem, false, true);
979  for (arg_iterator it = Args.filtered_begin(OPT_cxx_isystem),
980       ie = Args.filtered_end(); it != ie; ++it)
981    Opts.AddPath((*it)->getValue(), frontend::CXXSystem, false, true);
982  for (arg_iterator it = Args.filtered_begin(OPT_objc_isystem),
983       ie = Args.filtered_end(); it != ie; ++it)
984    Opts.AddPath((*it)->getValue(), frontend::ObjCSystem, false,true);
985  for (arg_iterator it = Args.filtered_begin(OPT_objcxx_isystem),
986       ie = Args.filtered_end(); it != ie; ++it)
987    Opts.AddPath((*it)->getValue(), frontend::ObjCXXSystem, false, true);
988
989  // Add the internal paths from a driver that detects standard include paths.
990  for (arg_iterator I = Args.filtered_begin(OPT_internal_isystem,
991                                            OPT_internal_externc_isystem),
992                    E = Args.filtered_end();
993       I != E; ++I) {
994    frontend::IncludeDirGroup Group = frontend::System;
995    if ((*I)->getOption().matches(OPT_internal_externc_isystem))
996      Group = frontend::ExternCSystem;
997    Opts.AddPath((*I)->getValue(), Group, false, true);
998  }
999
1000  // Add the path prefixes which are implicitly treated as being system headers.
1001  for (arg_iterator I = Args.filtered_begin(OPT_isystem_prefix,
1002                                            OPT_ino_system_prefix),
1003                    E = Args.filtered_end();
1004       I != E; ++I)
1005    Opts.AddSystemHeaderPrefix((*I)->getValue(),
1006                               (*I)->getOption().matches(OPT_isystem_prefix));
1007}
1008
1009void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
1010                                         LangStandard::Kind LangStd) {
1011  // Set some properties which depend solely on the input kind; it would be nice
1012  // to move these to the language standard, and have the driver resolve the
1013  // input kind + language standard.
1014  if (IK == IK_Asm) {
1015    Opts.AsmPreprocessor = 1;
1016  } else if (IK == IK_ObjC ||
1017             IK == IK_ObjCXX ||
1018             IK == IK_PreprocessedObjC ||
1019             IK == IK_PreprocessedObjCXX) {
1020    Opts.ObjC1 = Opts.ObjC2 = 1;
1021  }
1022
1023  if (LangStd == LangStandard::lang_unspecified) {
1024    // Based on the base language, pick one.
1025    switch (IK) {
1026    case IK_None:
1027    case IK_AST:
1028    case IK_LLVM_IR:
1029      llvm_unreachable("Invalid input kind!");
1030    case IK_OpenCL:
1031      LangStd = LangStandard::lang_opencl;
1032      break;
1033    case IK_CUDA:
1034      LangStd = LangStandard::lang_cuda;
1035      break;
1036    case IK_Asm:
1037    case IK_C:
1038    case IK_PreprocessedC:
1039    case IK_ObjC:
1040    case IK_PreprocessedObjC:
1041      LangStd = LangStandard::lang_gnu99;
1042      break;
1043    case IK_CXX:
1044    case IK_PreprocessedCXX:
1045    case IK_ObjCXX:
1046    case IK_PreprocessedObjCXX:
1047      LangStd = LangStandard::lang_gnucxx98;
1048      break;
1049    }
1050  }
1051
1052  const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1053  Opts.LineComment = Std.hasLineComments();
1054  Opts.C99 = Std.isC99();
1055  Opts.C11 = Std.isC11();
1056  Opts.CPlusPlus = Std.isCPlusPlus();
1057  Opts.CPlusPlus11 = Std.isCPlusPlus11();
1058  Opts.CPlusPlus1y = Std.isCPlusPlus1y();
1059  Opts.Digraphs = Std.hasDigraphs();
1060  Opts.GNUMode = Std.isGNUMode();
1061  Opts.GNUInline = !Std.isC99();
1062  Opts.HexFloats = Std.hasHexFloats();
1063  Opts.ImplicitInt = Std.hasImplicitInt();
1064
1065  // Set OpenCL Version.
1066  if (LangStd == LangStandard::lang_opencl) {
1067    Opts.OpenCL = 1;
1068    Opts.OpenCLVersion = 100;
1069  }
1070  else if (LangStd == LangStandard::lang_opencl11) {
1071      Opts.OpenCL = 1;
1072      Opts.OpenCLVersion = 110;
1073  }
1074  else if (LangStd == LangStandard::lang_opencl12) {
1075    Opts.OpenCL = 1;
1076    Opts.OpenCLVersion = 120;
1077  }
1078
1079  // OpenCL has some additional defaults.
1080  if (Opts.OpenCL) {
1081    Opts.AltiVec = 0;
1082    Opts.CXXOperatorNames = 1;
1083    Opts.LaxVectorConversions = 0;
1084    Opts.DefaultFPContract = 1;
1085    Opts.NativeHalfType = 1;
1086  }
1087
1088  if (LangStd == LangStandard::lang_cuda)
1089    Opts.CUDA = 1;
1090
1091  // OpenCL and C++ both have bool, true, false keywords.
1092  Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1093
1094  // C++ has wchar_t keyword.
1095  Opts.WChar = Opts.CPlusPlus;
1096
1097  Opts.GNUKeywords = Opts.GNUMode;
1098  Opts.CXXOperatorNames = Opts.CPlusPlus;
1099
1100  // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1101  // is specified, or -std is set to a conforming mode.
1102  Opts.Trigraphs = !Opts.GNUMode;
1103
1104  Opts.DollarIdents = !Opts.AsmPreprocessor;
1105
1106  // C++1y onwards has sized global deallocation functions.
1107  Opts.SizedDeallocation = Opts.CPlusPlus1y;
1108}
1109
1110/// Attempt to parse a visibility value out of the given argument.
1111static Visibility parseVisibility(Arg *arg, ArgList &args,
1112                                  DiagnosticsEngine &diags) {
1113  StringRef value = arg->getValue();
1114  if (value == "default") {
1115    return DefaultVisibility;
1116  } else if (value == "hidden") {
1117    return HiddenVisibility;
1118  } else if (value == "protected") {
1119    // FIXME: diagnose if target does not support protected visibility
1120    return ProtectedVisibility;
1121  }
1122
1123  diags.Report(diag::err_drv_invalid_value)
1124    << arg->getAsString(args) << value;
1125  return DefaultVisibility;
1126}
1127
1128static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1129                          DiagnosticsEngine &Diags) {
1130  // FIXME: Cleanup per-file based stuff.
1131  LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1132  if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1133    LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1134#define LANGSTANDARD(id, name, desc, features) \
1135      .Case(name, LangStandard::lang_##id)
1136#include "clang/Frontend/LangStandards.def"
1137      .Default(LangStandard::lang_unspecified);
1138    if (LangStd == LangStandard::lang_unspecified)
1139      Diags.Report(diag::err_drv_invalid_value)
1140        << A->getAsString(Args) << A->getValue();
1141    else {
1142      // Valid standard, check to make sure language and standard are compatable.
1143      const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1144      switch (IK) {
1145      case IK_C:
1146      case IK_ObjC:
1147      case IK_PreprocessedC:
1148      case IK_PreprocessedObjC:
1149        if (!(Std.isC89() || Std.isC99()))
1150          Diags.Report(diag::err_drv_argument_not_allowed_with)
1151            << A->getAsString(Args) << "C/ObjC";
1152        break;
1153      case IK_CXX:
1154      case IK_ObjCXX:
1155      case IK_PreprocessedCXX:
1156      case IK_PreprocessedObjCXX:
1157        if (!Std.isCPlusPlus())
1158          Diags.Report(diag::err_drv_argument_not_allowed_with)
1159            << A->getAsString(Args) << "C++/ObjC++";
1160        break;
1161      case IK_OpenCL:
1162        if (!Std.isC99())
1163          Diags.Report(diag::err_drv_argument_not_allowed_with)
1164            << A->getAsString(Args) << "OpenCL";
1165        break;
1166      case IK_CUDA:
1167        if (!Std.isCPlusPlus())
1168          Diags.Report(diag::err_drv_argument_not_allowed_with)
1169            << A->getAsString(Args) << "CUDA";
1170        break;
1171      default:
1172        break;
1173      }
1174    }
1175  }
1176
1177  // -cl-std only applies for OpenCL language standards.
1178  // Override the -std option in this case.
1179  if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1180    LangStandard::Kind OpenCLLangStd
1181    = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1182    .Case("CL", LangStandard::lang_opencl)
1183    .Case("CL1.1", LangStandard::lang_opencl11)
1184    .Case("CL1.2", LangStandard::lang_opencl12)
1185    .Default(LangStandard::lang_unspecified);
1186
1187    if (OpenCLLangStd == LangStandard::lang_unspecified) {
1188      Diags.Report(diag::err_drv_invalid_value)
1189      << A->getAsString(Args) << A->getValue();
1190    }
1191    else
1192      LangStd = OpenCLLangStd;
1193  }
1194
1195  CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1196
1197  // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1198  // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1199  // while a subset (the non-C++ GNU keywords) is provided by GCC's
1200  // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1201  // name, as it doesn't seem a useful distinction.
1202  Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1203                                  Opts.GNUKeywords);
1204
1205  if (Args.hasArg(OPT_fno_operator_names))
1206    Opts.CXXOperatorNames = 0;
1207
1208  if (Opts.ObjC1) {
1209    if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1210      StringRef value = arg->getValue();
1211      if (Opts.ObjCRuntime.tryParse(value))
1212        Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1213    }
1214
1215    if (Args.hasArg(OPT_fobjc_gc_only))
1216      Opts.setGC(LangOptions::GCOnly);
1217    else if (Args.hasArg(OPT_fobjc_gc))
1218      Opts.setGC(LangOptions::HybridGC);
1219    else if (Args.hasArg(OPT_fobjc_arc)) {
1220      Opts.ObjCAutoRefCount = 1;
1221      if (!Opts.ObjCRuntime.allowsARC())
1222        Diags.Report(diag::err_arc_unsupported_on_runtime);
1223
1224      // Only set ObjCARCWeak if ARC is enabled.
1225      if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1226        Opts.ObjCARCWeak = 1;
1227      else
1228        Opts.ObjCARCWeak = Opts.ObjCRuntime.allowsWeak();
1229    }
1230
1231    if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1232      Opts.ObjCInferRelatedResultType = 0;
1233
1234    if (Args.hasArg(OPT_fobjc_subscripting_legacy_runtime))
1235      Opts.ObjCSubscriptingLegacyRuntime =
1236        (Opts.ObjCRuntime.getKind() == ObjCRuntime::FragileMacOSX);
1237  }
1238
1239  if (Args.hasArg(OPT_fgnu89_inline))
1240    Opts.GNUInline = 1;
1241
1242  if (Args.hasArg(OPT_fapple_kext)) {
1243    if (!Opts.CPlusPlus)
1244      Diags.Report(diag::warn_c_kext);
1245    else
1246      Opts.AppleKext = 1;
1247  }
1248
1249  if (Args.hasArg(OPT_print_ivar_layout))
1250    Opts.ObjCGCBitmapPrint = 1;
1251  if (Args.hasArg(OPT_fno_constant_cfstrings))
1252    Opts.NoConstantCFStrings = 1;
1253
1254  if (Args.hasArg(OPT_faltivec))
1255    Opts.AltiVec = 1;
1256
1257  if (Args.hasArg(OPT_pthread))
1258    Opts.POSIXThreads = 1;
1259
1260  // The value-visibility mode defaults to "default".
1261  if (Arg *visOpt = Args.getLastArg(OPT_fvisibility)) {
1262    Opts.setValueVisibilityMode(parseVisibility(visOpt, Args, Diags));
1263  } else {
1264    Opts.setValueVisibilityMode(DefaultVisibility);
1265  }
1266
1267  // The type-visibility mode defaults to the value-visibility mode.
1268  if (Arg *typeVisOpt = Args.getLastArg(OPT_ftype_visibility)) {
1269    Opts.setTypeVisibilityMode(parseVisibility(typeVisOpt, Args, Diags));
1270  } else {
1271    Opts.setTypeVisibilityMode(Opts.getValueVisibilityMode());
1272  }
1273
1274  if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1275    Opts.InlineVisibilityHidden = 1;
1276
1277  if (Args.hasArg(OPT_ftrapv)) {
1278    Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1279    // Set the handler, if one is specified.
1280    Opts.OverflowHandler =
1281        Args.getLastArgValue(OPT_ftrapv_handler);
1282  }
1283  else if (Args.hasArg(OPT_fwrapv))
1284    Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1285
1286  if (Args.hasArg(OPT_trigraphs))
1287    Opts.Trigraphs = 1;
1288
1289  Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1290                                   OPT_fno_dollars_in_identifiers,
1291                                   Opts.DollarIdents);
1292  Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1293  Opts.MicrosoftExt
1294    = Args.hasArg(OPT_fms_extensions) || Args.hasArg(OPT_fms_compatibility);
1295  Opts.MicrosoftMode = Args.hasArg(OPT_fms_compatibility);
1296  Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
1297  Opts.MSCVersion = getLastArgIntValue(Args, OPT_fmsc_version, 0, Diags);
1298  Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1299  Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1300  Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
1301                                   Opts.ConstStrings);
1302  if (Args.hasArg(OPT_fno_lax_vector_conversions))
1303    Opts.LaxVectorConversions = 0;
1304  if (Args.hasArg(OPT_fno_threadsafe_statics))
1305    Opts.ThreadsafeStatics = 0;
1306  Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1307  Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
1308  Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
1309  Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1310  Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
1311
1312  Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1313  Opts.Blocks = Args.hasArg(OPT_fblocks);
1314  Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
1315  Opts.Modules = Args.hasArg(OPT_fmodules);
1316  Opts.ModulesDeclUse = Args.hasArg(OPT_fmodules_decluse);
1317  Opts.CharIsSigned = Opts.OpenCL || !Args.hasArg(OPT_fno_signed_char);
1318  Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
1319  Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1320  Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1321  Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1322  Opts.FormatExtensions = Args.hasArg(OPT_fformat_extensions);
1323  Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1324  Opts.NoMathBuiltin = Args.hasArg(OPT_fno_math_builtin);
1325  Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1326  Opts.SizedDeallocation |= Args.hasArg(OPT_fsized_deallocation);
1327  Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1328  Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1329  Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1330  Opts.MathErrno = !Opts.OpenCL && Args.hasArg(OPT_fmath_errno);
1331  Opts.InstantiationDepth =
1332      getLastArgIntValue(Args, OPT_ftemplate_depth, 256, Diags);
1333  Opts.ArrowDepth =
1334      getLastArgIntValue(Args, OPT_foperator_arrow_depth, 256, Diags);
1335  Opts.ConstexprCallDepth =
1336      getLastArgIntValue(Args, OPT_fconstexpr_depth, 512, Diags);
1337  Opts.ConstexprStepLimit =
1338      getLastArgIntValue(Args, OPT_fconstexpr_steps, 1048576, Diags);
1339  Opts.BracketDepth = getLastArgIntValue(Args, OPT_fbracket_depth, 256, Diags);
1340  Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
1341  Opts.NumLargeByValueCopy =
1342      getLastArgIntValue(Args, OPT_Wlarge_by_value_copy_EQ, 0, Diags);
1343  Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
1344  Opts.ObjCConstantStringClass =
1345    Args.getLastArgValue(OPT_fconstant_string_class);
1346  Opts.ObjCDefaultSynthProperties =
1347    !Args.hasArg(OPT_disable_objc_default_synthesize_properties);
1348  Opts.EncodeExtendedBlockSig =
1349    Args.hasArg(OPT_fencode_extended_block_signature);
1350  Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1351  Opts.PackStruct = getLastArgIntValue(Args, OPT_fpack_struct_EQ, 0, Diags);
1352  Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
1353  Opts.PIELevel = getLastArgIntValue(Args, OPT_pie_level, 0, Diags);
1354  Opts.Static = Args.hasArg(OPT_static_define);
1355  Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
1356  Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
1357                        || Args.hasArg(OPT_fdump_record_layouts);
1358  Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1359  Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1360  Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1361  Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
1362  Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
1363  Opts.MRTD = Args.hasArg(OPT_mrtd);
1364  Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
1365  Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
1366  Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
1367  Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
1368  Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
1369  Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
1370  Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
1371  Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
1372
1373  if (Arg *A = Args.getLastArg(OPT_faddress_space_map_mangling_EQ)) {
1374    switch (llvm::StringSwitch<unsigned>(A->getValue())
1375      .Case("target", LangOptions::ASMM_Target)
1376      .Case("no", LangOptions::ASMM_Off)
1377      .Case("yes", LangOptions::ASMM_On)
1378      .Default(255)) {
1379    default:
1380      Diags.Report(diag::err_drv_invalid_value)
1381        << "-faddress-space-map-mangling=" << A->getValue();
1382      break;
1383    case LangOptions::ASMM_Target:
1384      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Target);
1385      break;
1386    case LangOptions::ASMM_On:
1387      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_On);
1388      break;
1389    case LangOptions::ASMM_Off:
1390      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Off);
1391      break;
1392    }
1393  }
1394
1395  // Check if -fopenmp is specified.
1396  Opts.OpenMP = Args.hasArg(OPT_fopenmp);
1397
1398  // Record whether the __DEPRECATED define was requested.
1399  Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
1400                                 OPT_fno_deprecated_macro,
1401                                 Opts.Deprecated);
1402
1403  // FIXME: Eliminate this dependency.
1404  unsigned Opt = getOptimizationLevel(Args, IK, Diags),
1405       OptSize = getOptimizationLevelSize(Args);
1406  Opts.Optimize = Opt != 0;
1407  Opts.OptimizeSize = OptSize != 0;
1408
1409  // This is the __NO_INLINE__ define, which just depends on things like the
1410  // optimization level and -fno-inline, not actually whether the backend has
1411  // inlining enabled.
1412  Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
1413
1414  Opts.FastMath = Args.hasArg(OPT_ffast_math);
1415  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only);
1416
1417  Opts.RetainCommentsFromSystemHeaders =
1418      Args.hasArg(OPT_fretain_comments_from_system_headers);
1419
1420  unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
1421  switch (SSP) {
1422  default:
1423    Diags.Report(diag::err_drv_invalid_value)
1424      << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1425    break;
1426  case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
1427  case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
1428  case 2: Opts.setStackProtector(LangOptions::SSPReq); break;
1429  }
1430
1431  // Parse -fsanitize= arguments.
1432  std::vector<std::string> Sanitizers = Args.getAllArgValues(OPT_fsanitize_EQ);
1433  for (unsigned I = 0, N = Sanitizers.size(); I != N; ++I) {
1434    // Since the Opts.Sanitize* values are bitfields, it's a little tricky to
1435    // efficiently map string values to them. Perform the mapping indirectly:
1436    // convert strings to enumerated values, then switch over the enum to set
1437    // the right bitfield value.
1438    enum Sanitizer {
1439#define SANITIZER(NAME, ID) \
1440      ID,
1441#include "clang/Basic/Sanitizers.def"
1442      Unknown
1443    };
1444    switch (llvm::StringSwitch<unsigned>(Sanitizers[I])
1445#define SANITIZER(NAME, ID) \
1446              .Case(NAME, ID)
1447#include "clang/Basic/Sanitizers.def"
1448              .Default(Unknown)) {
1449#define SANITIZER(NAME, ID) \
1450    case ID: \
1451      Opts.Sanitize.ID = true; \
1452      break;
1453#include "clang/Basic/Sanitizers.def"
1454
1455    case Unknown:
1456      Diags.Report(diag::err_drv_invalid_value)
1457        << "-fsanitize=" << Sanitizers[I];
1458      break;
1459    }
1460  }
1461}
1462
1463static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1464                                  FileManager &FileMgr,
1465                                  DiagnosticsEngine &Diags) {
1466  using namespace options;
1467  Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1468  Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1469  if (const Arg *A = Args.getLastArg(OPT_token_cache))
1470      Opts.TokenCache = A->getValue();
1471  else
1472    Opts.TokenCache = Opts.ImplicitPTHInclude;
1473  Opts.UsePredefines = !Args.hasArg(OPT_undef);
1474  Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1475  Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1476
1477  Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
1478  for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
1479         ie = Args.filtered_end(); it != ie; ++it) {
1480    const Arg *A = *it;
1481    Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
1482  }
1483
1484  if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1485    StringRef Value(A->getValue());
1486    size_t Comma = Value.find(',');
1487    unsigned Bytes = 0;
1488    unsigned EndOfLine = 0;
1489
1490    if (Comma == StringRef::npos ||
1491        Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1492        Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1493      Diags.Report(diag::err_drv_preamble_format);
1494    else {
1495      Opts.PrecompiledPreambleBytes.first = Bytes;
1496      Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1497    }
1498  }
1499
1500  // Add macros from the command line.
1501  for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1502         ie = Args.filtered_end(); it != ie; ++it) {
1503    if ((*it)->getOption().matches(OPT_D))
1504      Opts.addMacroDef((*it)->getValue());
1505    else
1506      Opts.addMacroUndef((*it)->getValue());
1507  }
1508
1509  Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1510
1511  // Add the ordered list of -includes.
1512  for (arg_iterator it = Args.filtered_begin(OPT_include),
1513         ie = Args.filtered_end(); it != ie; ++it) {
1514    const Arg *A = *it;
1515    Opts.Includes.push_back(A->getValue());
1516  }
1517
1518  for (arg_iterator it = Args.filtered_begin(OPT_chain_include),
1519         ie = Args.filtered_end(); it != ie; ++it) {
1520    const Arg *A = *it;
1521    Opts.ChainedIncludes.push_back(A->getValue());
1522  }
1523
1524  // Include 'altivec.h' if -faltivec option present
1525  if (Args.hasArg(OPT_faltivec))
1526    Opts.Includes.push_back("altivec.h");
1527
1528  for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1529         ie = Args.filtered_end(); it != ie; ++it) {
1530    const Arg *A = *it;
1531    std::pair<StringRef,StringRef> Split =
1532      StringRef(A->getValue()).split(';');
1533
1534    if (Split.second.empty()) {
1535      Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1536      continue;
1537    }
1538
1539    Opts.addRemappedFile(Split.first, Split.second);
1540  }
1541
1542  if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
1543    StringRef Name = A->getValue();
1544    unsigned Library = llvm::StringSwitch<unsigned>(Name)
1545      .Case("libc++", ARCXX_libcxx)
1546      .Case("libstdc++", ARCXX_libstdcxx)
1547      .Case("none", ARCXX_nolib)
1548      .Default(~0U);
1549    if (Library == ~0U)
1550      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1551    else
1552      Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
1553  }
1554}
1555
1556static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1557                                        ArgList &Args,
1558                                        frontend::ActionKind Action) {
1559  using namespace options;
1560
1561  switch (Action) {
1562  case frontend::ASTDeclList:
1563  case frontend::ASTDump:
1564  case frontend::ASTPrint:
1565  case frontend::ASTView:
1566  case frontend::EmitAssembly:
1567  case frontend::EmitBC:
1568  case frontend::EmitHTML:
1569  case frontend::EmitLLVM:
1570  case frontend::EmitLLVMOnly:
1571  case frontend::EmitCodeGenOnly:
1572  case frontend::EmitObj:
1573  case frontend::FixIt:
1574  case frontend::GenerateModule:
1575  case frontend::GeneratePCH:
1576  case frontend::GeneratePTH:
1577  case frontend::ParseSyntaxOnly:
1578  case frontend::ModuleFileInfo:
1579  case frontend::PluginAction:
1580  case frontend::PrintDeclContext:
1581  case frontend::RewriteObjC:
1582  case frontend::RewriteTest:
1583  case frontend::RunAnalysis:
1584  case frontend::MigrateSource:
1585    Opts.ShowCPP = 0;
1586    break;
1587
1588  case frontend::DumpRawTokens:
1589  case frontend::DumpTokens:
1590  case frontend::InitOnly:
1591  case frontend::PrintPreamble:
1592  case frontend::PrintPreprocessedInput:
1593  case frontend::RewriteMacros:
1594  case frontend::RunPreprocessorOnly:
1595    Opts.ShowCPP = !Args.hasArg(OPT_dM);
1596    break;
1597  }
1598
1599  Opts.ShowComments = Args.hasArg(OPT_C);
1600  Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1601  Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1602  Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1603  Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
1604}
1605
1606static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1607  using namespace options;
1608  Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1609  Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
1610  Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1611  Opts.FPMath = Args.getLastArgValue(OPT_mfpmath);
1612  Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
1613  Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1614  Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1615
1616  // Use the default target triple if unspecified.
1617  if (Opts.Triple.empty())
1618    Opts.Triple = llvm::sys::getDefaultTargetTriple();
1619}
1620
1621//
1622
1623bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1624                                        const char *const *ArgBegin,
1625                                        const char *const *ArgEnd,
1626                                        DiagnosticsEngine &Diags) {
1627  bool Success = true;
1628
1629  // Parse the arguments.
1630  OwningPtr<OptTable> Opts(createDriverOptTable());
1631  const unsigned IncludedFlagsBitmask = options::CC1Option;
1632  unsigned MissingArgIndex, MissingArgCount;
1633  OwningPtr<InputArgList> Args(
1634    Opts->ParseArgs(ArgBegin, ArgEnd, MissingArgIndex, MissingArgCount,
1635                    IncludedFlagsBitmask));
1636
1637  // Check for missing argument error.
1638  if (MissingArgCount) {
1639    Diags.Report(diag::err_drv_missing_argument)
1640      << Args->getArgString(MissingArgIndex) << MissingArgCount;
1641    Success = false;
1642  }
1643
1644  // Issue errors on unknown arguments.
1645  for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1646         ie = Args->filtered_end(); it != ie; ++it) {
1647    Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
1648    Success = false;
1649  }
1650
1651  Success = ParseAnalyzerArgs(*Res.getAnalyzerOpts(), *Args, Diags) && Success;
1652  Success = ParseMigratorArgs(Res.getMigratorOpts(), *Args) && Success;
1653  ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1654  Success = ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, &Diags)
1655            && Success;
1656  ParseCommentArgs(Res.getLangOpts()->CommentOpts, *Args);
1657  ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
1658  // FIXME: We shouldn't have to pass the DashX option around here
1659  InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1660  Success = ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags)
1661            && Success;
1662  ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1663  if (DashX != IK_AST && DashX != IK_LLVM_IR) {
1664    ParseLangArgs(*Res.getLangOpts(), *Args, DashX, Diags);
1665    if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
1666      Res.getLangOpts()->ObjCExceptions = 1;
1667  }
1668  // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
1669  // PCH file and find the original header name. Remove the need to do that in
1670  // ParsePreprocessorArgs and remove the FileManager
1671  // parameters from the function and the "FileManager.h" #include.
1672  FileManager FileMgr(Res.getFileSystemOpts());
1673  ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
1674  ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args,
1675                              Res.getFrontendOpts().ProgramAction);
1676  ParseTargetArgs(Res.getTargetOpts(), *Args);
1677
1678  return Success;
1679}
1680
1681namespace {
1682
1683  class ModuleSignature {
1684    SmallVector<uint64_t, 16> Data;
1685    unsigned CurBit;
1686    uint64_t CurValue;
1687
1688  public:
1689    ModuleSignature() : CurBit(0), CurValue(0) { }
1690
1691    void add(uint64_t Value, unsigned Bits);
1692    void add(StringRef Value);
1693    void flush();
1694
1695    llvm::APInt getAsInteger() const;
1696  };
1697}
1698
1699void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
1700  CurValue |= Value << CurBit;
1701  if (CurBit + NumBits < 64) {
1702    CurBit += NumBits;
1703    return;
1704  }
1705
1706  // Add the current word.
1707  Data.push_back(CurValue);
1708
1709  if (CurBit)
1710    CurValue = Value >> (64-CurBit);
1711  else
1712    CurValue = 0;
1713  CurBit = (CurBit+NumBits) & 63;
1714}
1715
1716void ModuleSignature::flush() {
1717  if (CurBit == 0)
1718    return;
1719
1720  Data.push_back(CurValue);
1721  CurBit = 0;
1722  CurValue = 0;
1723}
1724
1725void ModuleSignature::add(StringRef Value) {
1726  for (StringRef::iterator I = Value.begin(), IEnd = Value.end(); I != IEnd;++I)
1727    add(*I, 8);
1728}
1729
1730llvm::APInt ModuleSignature::getAsInteger() const {
1731  return llvm::APInt(Data.size() * 64, Data);
1732}
1733
1734std::string CompilerInvocation::getModuleHash() const {
1735  // Note: For QoI reasons, the things we use as a hash here should all be
1736  // dumped via the -module-info flag.
1737  using llvm::hash_code;
1738  using llvm::hash_value;
1739  using llvm::hash_combine;
1740
1741  // Start the signature with the compiler version.
1742  // FIXME: We'd rather use something more cryptographically sound than
1743  // CityHash, but this will do for now.
1744  hash_code code = hash_value(getClangFullRepositoryVersion());
1745
1746  // Extend the signature with the language options
1747#define LANGOPT(Name, Bits, Default, Description) \
1748   code = hash_combine(code, LangOpts->Name);
1749#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
1750  code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
1751#define BENIGN_LANGOPT(Name, Bits, Default, Description)
1752#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
1753#include "clang/Basic/LangOptions.def"
1754
1755  // Extend the signature with the target options.
1756  code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
1757                      TargetOpts->ABI, TargetOpts->CXXABI,
1758                      TargetOpts->LinkerVersion);
1759  for (unsigned i = 0, n = TargetOpts->FeaturesAsWritten.size(); i != n; ++i)
1760    code = hash_combine(code, TargetOpts->FeaturesAsWritten[i]);
1761
1762  // Extend the signature with preprocessor options.
1763  const PreprocessorOptions &ppOpts = getPreprocessorOpts();
1764  const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
1765  code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
1766
1767  std::vector<StringRef> MacroDefs;
1768  for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
1769            I = getPreprocessorOpts().Macros.begin(),
1770         IEnd = getPreprocessorOpts().Macros.end();
1771       I != IEnd; ++I) {
1772    // If we're supposed to ignore this macro for the purposes of modules,
1773    // don't put it into the hash.
1774    if (!hsOpts.ModulesIgnoreMacros.empty()) {
1775      // Check whether we're ignoring this macro.
1776      StringRef MacroDef = I->first;
1777      if (hsOpts.ModulesIgnoreMacros.count(MacroDef.split('=').first))
1778        continue;
1779    }
1780
1781    code = hash_combine(code, I->first, I->second);
1782  }
1783
1784  // Extend the signature with the sysroot.
1785  code = hash_combine(code, hsOpts.Sysroot, hsOpts.UseBuiltinIncludes,
1786                      hsOpts.UseStandardSystemIncludes,
1787                      hsOpts.UseStandardCXXIncludes,
1788                      hsOpts.UseLibcxx);
1789
1790  // Darwin-specific hack: if we have a sysroot, use the contents and
1791  // modification time of
1792  //   $sysroot/System/Library/CoreServices/SystemVersion.plist
1793  // as part of the module hash.
1794  if (!hsOpts.Sysroot.empty()) {
1795    llvm::OwningPtr<llvm::MemoryBuffer> buffer;
1796    SmallString<128> systemVersionFile;
1797    systemVersionFile += hsOpts.Sysroot;
1798    llvm::sys::path::append(systemVersionFile, "System");
1799    llvm::sys::path::append(systemVersionFile, "Library");
1800    llvm::sys::path::append(systemVersionFile, "CoreServices");
1801    llvm::sys::path::append(systemVersionFile, "SystemVersion.plist");
1802    if (!llvm::MemoryBuffer::getFile(systemVersionFile.str(), buffer)) {
1803      code = hash_combine(code, buffer.get()->getBuffer());
1804
1805      struct stat statBuf;
1806      if (stat(systemVersionFile.c_str(), &statBuf) == 0)
1807        code = hash_combine(code, statBuf.st_mtime);
1808    }
1809  }
1810
1811  return llvm::APInt(64, code).toString(36, /*Signed=*/false);
1812}
1813
1814namespace clang {
1815
1816// Declared in clang/Frontend/Utils.h.
1817int getLastArgIntValue(const ArgList &Args, OptSpecifier Id, int Default,
1818                       DiagnosticsEngine *Diags) {
1819  int Res = Default;
1820  if (Arg *A = Args.getLastArg(Id)) {
1821    if (StringRef(A->getValue()).getAsInteger(10, Res)) {
1822      if (Diags)
1823        Diags->Report(diag::err_drv_invalid_int_value) << A->getAsString(Args)
1824                                                       << A->getValue();
1825    }
1826  }
1827  return Res;
1828}
1829}
1830