CompilerInvocation.cpp revision 4cb295d3b32cb04215f87948fbf944ee4c31de1b 
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  unsigned OptLevel = getOptimizationLevel(Args, IK, Diags);
303  if (OptLevel > 3) {
304    Diags.Report(diag::err_drv_invalid_value)
305      << Args.getLastArg(OPT_O)->getAsString(Args) << OptLevel;
306    OptLevel = 3;
307    Success = false;
308  }
309  Opts.OptimizationLevel = OptLevel;
310
311  // We must always run at least the always inlining pass.
312  Opts.setInlining(
313    (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
314                                 : CodeGenOptions::OnlyAlwaysInlining);
315  // -fno-inline-functions overrides OptimizationLevel > 1.
316  Opts.NoInline = Args.hasArg(OPT_fno_inline);
317  Opts.setInlining(Args.hasArg(OPT_fno_inline_functions) ?
318                     CodeGenOptions::OnlyAlwaysInlining : Opts.getInlining());
319
320  if (Args.hasArg(OPT_gline_tables_only)) {
321    Opts.setDebugInfo(CodeGenOptions::DebugLineTablesOnly);
322  } else if (Args.hasArg(OPT_g_Flag) || Args.hasArg(OPT_gdwarf_2) ||
323             Args.hasArg(OPT_gdwarf_3) || Args.hasArg(OPT_gdwarf_4)) {
324    if (Args.hasFlag(OPT_flimit_debug_info, OPT_fno_limit_debug_info, true))
325      Opts.setDebugInfo(CodeGenOptions::LimitedDebugInfo);
326    else
327      Opts.setDebugInfo(CodeGenOptions::FullDebugInfo);
328  }
329  Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
330  Opts.SplitDwarfFile = Args.getLastArgValue(OPT_split_dwarf_file);
331  if (Args.hasArg(OPT_gdwarf_2))
332    Opts.DwarfVersion = 2;
333  else if (Args.hasArg(OPT_gdwarf_3))
334    Opts.DwarfVersion = 3;
335  else if (Args.hasArg(OPT_gdwarf_4))
336    Opts.DwarfVersion = 4;
337  else if (Opts.getDebugInfo() != CodeGenOptions::NoDebugInfo)
338    // Default Dwarf version is 4 if we are generating debug information.
339    Opts.DwarfVersion = 4;
340
341  Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
342  Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
343  Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
344  Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
345    OPT_fuse_register_sized_bitfield_access);
346  Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
347  Opts.StructPathTBAA = Args.hasArg(OPT_struct_path_tbaa);
348  Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
349  Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
350  Opts.NoCommon = Args.hasArg(OPT_fno_common);
351  Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
352  Opts.OptimizeSize = getOptimizationLevelSize(Args);
353  Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
354                            Args.hasArg(OPT_ffreestanding));
355  Opts.UnrollLoops =
356      Args.hasFlag(OPT_funroll_loops, OPT_fno_unroll_loops,
357                   (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize));
358
359  Opts.Autolink = !Args.hasArg(OPT_fno_autolink);
360  Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
361  Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
362  Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);
363  Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
364  Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
365  Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
366  Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
367  Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
368  Opts.DisableFree = Args.hasArg(OPT_disable_free);
369  Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
370  Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
371  Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
372  Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
373  Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
374  Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
375                       Args.hasArg(OPT_cl_finite_math_only)||
376                       Args.hasArg(OPT_cl_fast_relaxed_math));
377  Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
378                       Args.hasArg(OPT_cl_finite_math_only)||
379                       Args.hasArg(OPT_cl_fast_relaxed_math));
380  Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
381  Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
382  Opts.NumRegisterParameters = getLastArgIntValue(Args, OPT_mregparm, 0, Diags);
383  Opts.NoGlobalMerge = Args.hasArg(OPT_mno_global_merge);
384  Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
385  Opts.EnableSegmentedStacks = Args.hasArg(OPT_split_stacks);
386  Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
387  Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
388  Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
389  Opts.NoDwarf2CFIAsm = Args.hasArg(OPT_fno_dwarf2_cfi_asm);
390  Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
391  Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
392  Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
393  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
394                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
395                      Args.hasArg(OPT_cl_fast_relaxed_math);
396  Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
397  Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
398  Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
399  Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
400
401  Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
402  Opts.DataSections = Args.hasArg(OPT_fdata_sections);
403
404  Opts.VectorizeBB = Args.hasArg(OPT_vectorize_slp_aggressive);
405  Opts.VectorizeLoop = Args.hasArg(OPT_vectorize_loops);
406  Opts.VectorizeSLP = Args.hasArg(OPT_vectorize_slp);
407
408  Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
409  Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
410  Opts.SanitizeRecover = !Args.hasArg(OPT_fno_sanitize_recover);
411
412  Opts.DisableGCov = Args.hasArg(OPT_test_coverage);
413  Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
414  Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
415  if (Opts.EmitGcovArcs || Opts.EmitGcovNotes) {
416  Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
417    Opts.CoverageExtraChecksum = Args.hasArg(OPT_coverage_cfg_checksum);
418    Opts.CoverageNoFunctionNamesInData =
419        Args.hasArg(OPT_coverage_no_function_names_in_data);
420    if (Args.hasArg(OPT_coverage_version_EQ)) {
421      StringRef CoverageVersion = Args.getLastArgValue(OPT_coverage_version_EQ);
422      if (CoverageVersion.size() != 4) {
423        Diags.Report(diag::err_drv_invalid_value)
424            << Args.getLastArg(OPT_coverage_version_EQ)->getAsString(Args)
425            << CoverageVersion;
426      } else {
427        memcpy(Opts.CoverageVersion, CoverageVersion.data(), 4);
428      }
429    }
430  }
431
432  Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
433  Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
434  Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
435  Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
436  Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
437  Opts.SanitizerBlacklistFile = Args.getLastArgValue(OPT_fsanitize_blacklist);
438  Opts.SanitizeMemoryTrackOrigins =
439    Args.hasArg(OPT_fsanitize_memory_track_origins);
440  Opts.SanitizeAddressZeroBaseShadow =
441    Args.hasArg(OPT_fsanitize_address_zero_base_shadow);
442  Opts.SanitizeUndefinedTrapOnError =
443    Args.hasArg(OPT_fsanitize_undefined_trap_on_error);
444  Opts.SSPBufferSize =
445      getLastArgIntValue(Args, OPT_stack_protector_buffer_size, 8, Diags);
446  Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
447  if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
448    StringRef Val = A->getValue();
449    unsigned StackAlignment = Opts.StackAlignment;
450    Val.getAsInteger(10, StackAlignment);
451    Opts.StackAlignment = StackAlignment;
452  }
453
454  if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
455    StringRef Name = A->getValue();
456    unsigned Method = llvm::StringSwitch<unsigned>(Name)
457      .Case("legacy", CodeGenOptions::Legacy)
458      .Case("non-legacy", CodeGenOptions::NonLegacy)
459      .Case("mixed", CodeGenOptions::Mixed)
460      .Default(~0U);
461    if (Method == ~0U) {
462      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
463      Success = false;
464    } else {
465      Opts.setObjCDispatchMethod(
466        static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
467    }
468  }
469
470  if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
471    StringRef Name = A->getValue();
472    unsigned Model = llvm::StringSwitch<unsigned>(Name)
473        .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
474        .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
475        .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
476        .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
477        .Default(~0U);
478    if (Model == ~0U) {
479      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
480      Success = false;
481    } else {
482      Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
483    }
484  }
485
486  if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
487    StringRef Val = A->getValue();
488    if (Val == "fast")
489      Opts.setFPContractMode(CodeGenOptions::FPC_Fast);
490    else if (Val == "on")
491      Opts.setFPContractMode(CodeGenOptions::FPC_On);
492    else if (Val == "off")
493      Opts.setFPContractMode(CodeGenOptions::FPC_Off);
494    else
495      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
496  }
497
498  if (Arg *A = Args.getLastArg(OPT_fpcc_struct_return, OPT_freg_struct_return)) {
499    if (A->getOption().matches(OPT_fpcc_struct_return)) {
500      Opts.setStructReturnConvention(CodeGenOptions::SRCK_OnStack);
501    } else {
502      assert(A->getOption().matches(OPT_freg_struct_return));
503      Opts.setStructReturnConvention(CodeGenOptions::SRCK_InRegs);
504    }
505  }
506
507  Opts.DependentLibraries = Args.getAllArgValues(OPT_dependent_lib);
508
509  return Success;
510}
511
512static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
513                                      ArgList &Args) {
514  using namespace options;
515  Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
516  Opts.Targets = Args.getAllArgValues(OPT_MT);
517  Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
518  Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
519  Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
520  Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
521  Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
522  Opts.PrintShowIncludes = Args.hasArg(OPT_show_includes);
523  Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
524}
525
526bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
527                                DiagnosticsEngine *Diags) {
528  using namespace options;
529  bool Success = true;
530
531  Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
532  Opts.DiagnosticSerializationFile =
533    Args.getLastArgValue(OPT_diagnostic_serialized_file);
534  Opts.IgnoreWarnings = Args.hasArg(OPT_w);
535  Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
536  Opts.Pedantic = Args.hasArg(OPT_pedantic);
537  Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
538  Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
539  Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
540  Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
541                                 OPT_fno_show_column,
542                                 /*Default=*/true);
543  Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
544  Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
545  Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
546
547  llvm::sys::Process::UseANSIEscapeCodes(Args.hasArg(OPT_fansi_escape_codes));
548
549  // Default behavior is to not to show note include stacks.
550  Opts.ShowNoteIncludeStack = false;
551  if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
552                               OPT_fno_diagnostics_show_note_include_stack))
553    if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
554      Opts.ShowNoteIncludeStack = true;
555
556  StringRef ShowOverloads =
557    Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
558  if (ShowOverloads == "best")
559    Opts.setShowOverloads(Ovl_Best);
560  else if (ShowOverloads == "all")
561    Opts.setShowOverloads(Ovl_All);
562  else {
563    Success = false;
564    if (Diags)
565      Diags->Report(diag::err_drv_invalid_value)
566      << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
567      << ShowOverloads;
568  }
569
570  StringRef ShowCategory =
571    Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
572  if (ShowCategory == "none")
573    Opts.ShowCategories = 0;
574  else if (ShowCategory == "id")
575    Opts.ShowCategories = 1;
576  else if (ShowCategory == "name")
577    Opts.ShowCategories = 2;
578  else {
579    Success = false;
580    if (Diags)
581      Diags->Report(diag::err_drv_invalid_value)
582      << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
583      << ShowCategory;
584  }
585
586  StringRef Format =
587    Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
588  if (Format == "clang")
589    Opts.setFormat(DiagnosticOptions::Clang);
590  else if (Format == "msvc")
591    Opts.setFormat(DiagnosticOptions::Msvc);
592  else if (Format == "msvc-fallback") {
593    Opts.setFormat(DiagnosticOptions::Msvc);
594    Opts.CLFallbackMode = true;
595  } else if (Format == "vi")
596    Opts.setFormat(DiagnosticOptions::Vi);
597  else {
598    Success = false;
599    if (Diags)
600      Diags->Report(diag::err_drv_invalid_value)
601      << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
602      << Format;
603  }
604
605  Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
606  Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
607  Opts.ShowPresumedLoc = !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
608  Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
609  Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
610  Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
611  Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
612  Opts.MacroBacktraceLimit =
613      getLastArgIntValue(Args, OPT_fmacro_backtrace_limit,
614                         DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
615  Opts.TemplateBacktraceLimit = getLastArgIntValue(
616      Args, OPT_ftemplate_backtrace_limit,
617      DiagnosticOptions::DefaultTemplateBacktraceLimit, Diags);
618  Opts.ConstexprBacktraceLimit = getLastArgIntValue(
619      Args, OPT_fconstexpr_backtrace_limit,
620      DiagnosticOptions::DefaultConstexprBacktraceLimit, Diags);
621  Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
622                                    DiagnosticOptions::DefaultTabStop, Diags);
623  if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
624    Opts.TabStop = DiagnosticOptions::DefaultTabStop;
625    if (Diags)
626      Diags->Report(diag::warn_ignoring_ftabstop_value)
627      << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
628  }
629  Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
630  addWarningArgs(Args, Opts.Warnings);
631
632  return Success;
633}
634
635static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
636  Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
637}
638
639static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
640                                   DiagnosticsEngine &Diags) {
641  using namespace options;
642  Opts.ProgramAction = frontend::ParseSyntaxOnly;
643  if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
644    switch (A->getOption().getID()) {
645    default:
646      llvm_unreachable("Invalid option in group!");
647    case OPT_ast_list:
648      Opts.ProgramAction = frontend::ASTDeclList; break;
649    case OPT_ast_dump:
650      Opts.ProgramAction = frontend::ASTDump; break;
651    case OPT_ast_dump_xml:
652      Opts.ProgramAction = frontend::ASTDumpXML; break;
653    case OPT_ast_print:
654      Opts.ProgramAction = frontend::ASTPrint; break;
655    case OPT_ast_view:
656      Opts.ProgramAction = frontend::ASTView; break;
657    case OPT_dump_raw_tokens:
658      Opts.ProgramAction = frontend::DumpRawTokens; break;
659    case OPT_dump_tokens:
660      Opts.ProgramAction = frontend::DumpTokens; break;
661    case OPT_S:
662      Opts.ProgramAction = frontend::EmitAssembly; break;
663    case OPT_emit_llvm_bc:
664      Opts.ProgramAction = frontend::EmitBC; break;
665    case OPT_emit_html:
666      Opts.ProgramAction = frontend::EmitHTML; break;
667    case OPT_emit_llvm:
668      Opts.ProgramAction = frontend::EmitLLVM; break;
669    case OPT_emit_llvm_only:
670      Opts.ProgramAction = frontend::EmitLLVMOnly; break;
671    case OPT_emit_codegen_only:
672      Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
673    case OPT_emit_obj:
674      Opts.ProgramAction = frontend::EmitObj; break;
675    case OPT_fixit_EQ:
676      Opts.FixItSuffix = A->getValue();
677      // fall-through!
678    case OPT_fixit:
679      Opts.ProgramAction = frontend::FixIt; break;
680    case OPT_emit_module:
681      Opts.ProgramAction = frontend::GenerateModule; break;
682    case OPT_emit_pch:
683      Opts.ProgramAction = frontend::GeneratePCH; break;
684    case OPT_emit_pth:
685      Opts.ProgramAction = frontend::GeneratePTH; break;
686    case OPT_init_only:
687      Opts.ProgramAction = frontend::InitOnly; break;
688    case OPT_fsyntax_only:
689      Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
690    case OPT_module_file_info:
691      Opts.ProgramAction = frontend::ModuleFileInfo; break;
692    case OPT_print_decl_contexts:
693      Opts.ProgramAction = frontend::PrintDeclContext; break;
694    case OPT_print_preamble:
695      Opts.ProgramAction = frontend::PrintPreamble; break;
696    case OPT_E:
697      Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
698    case OPT_rewrite_macros:
699      Opts.ProgramAction = frontend::RewriteMacros; break;
700    case OPT_rewrite_objc:
701      Opts.ProgramAction = frontend::RewriteObjC; break;
702    case OPT_rewrite_test:
703      Opts.ProgramAction = frontend::RewriteTest; break;
704    case OPT_analyze:
705      Opts.ProgramAction = frontend::RunAnalysis; break;
706    case OPT_migrate:
707      Opts.ProgramAction = frontend::MigrateSource; break;
708    case OPT_Eonly:
709      Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
710    }
711  }
712
713  if (const Arg* A = Args.getLastArg(OPT_plugin)) {
714    Opts.Plugins.push_back(A->getValue(0));
715    Opts.ProgramAction = frontend::PluginAction;
716    Opts.ActionName = A->getValue();
717
718    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
719           end = Args.filtered_end(); it != end; ++it) {
720      if ((*it)->getValue(0) == Opts.ActionName)
721        Opts.PluginArgs.push_back((*it)->getValue(1));
722    }
723  }
724
725  Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
726  Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
727  for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
728    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
729           end = Args.filtered_end(); it != end; ++it) {
730      if ((*it)->getValue(0) == Opts.AddPluginActions[i])
731        Opts.AddPluginArgs[i].push_back((*it)->getValue(1));
732    }
733  }
734
735  if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
736    Opts.CodeCompletionAt =
737      ParsedSourceLocation::FromString(A->getValue());
738    if (Opts.CodeCompletionAt.FileName.empty())
739      Diags.Report(diag::err_drv_invalid_value)
740        << A->getAsString(Args) << A->getValue();
741  }
742  Opts.DisableFree = Args.hasArg(OPT_disable_free);
743
744  Opts.OutputFile = Args.getLastArgValue(OPT_o);
745  Opts.Plugins = Args.getAllArgValues(OPT_load);
746  Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
747  Opts.ShowHelp = Args.hasArg(OPT_help);
748  Opts.ShowStats = Args.hasArg(OPT_print_stats);
749  Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
750  Opts.ShowVersion = Args.hasArg(OPT_version);
751  Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
752  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
753  Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
754  Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
755  Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
756  Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
757  Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
758  Opts.ASTDumpLookups = Args.hasArg(OPT_ast_dump_lookups);
759  Opts.UseGlobalModuleIndex = !Args.hasArg(OPT_fno_modules_global_index);
760  Opts.GenerateGlobalModuleIndex = Opts.UseGlobalModuleIndex;
761
762  Opts.CodeCompleteOpts.IncludeMacros
763    = Args.hasArg(OPT_code_completion_macros);
764  Opts.CodeCompleteOpts.IncludeCodePatterns
765    = Args.hasArg(OPT_code_completion_patterns);
766  Opts.CodeCompleteOpts.IncludeGlobals
767    = !Args.hasArg(OPT_no_code_completion_globals);
768  Opts.CodeCompleteOpts.IncludeBriefComments
769    = Args.hasArg(OPT_code_completion_brief_comments);
770
771  Opts.OverrideRecordLayoutsFile
772    = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
773  if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
774                                     OPT_arcmt_modify,
775                                     OPT_arcmt_migrate)) {
776    switch (A->getOption().getID()) {
777    default:
778      llvm_unreachable("missed a case");
779    case OPT_arcmt_check:
780      Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
781      break;
782    case OPT_arcmt_modify:
783      Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
784      break;
785    case OPT_arcmt_migrate:
786      Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
787      break;
788    }
789  }
790  Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
791  Opts.ARCMTMigrateReportOut
792    = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
793  Opts.ARCMTMigrateEmitARCErrors
794    = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
795
796  if (Args.hasArg(OPT_objcmt_migrate_literals))
797    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
798  if (Args.hasArg(OPT_objcmt_migrate_subscripting))
799    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
800  if (Args.hasArg(OPT_objcmt_migrate_property))
801    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Property;
802  if (Args.hasArg(OPT_objcmt_migrate_readonly_property))
803    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadonlyProperty;
804
805  if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
806      Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
807    Diags.Report(diag::err_drv_argument_not_allowed_with)
808      << "ARC migration" << "ObjC migration";
809  }
810
811  InputKind DashX = IK_None;
812  if (const Arg *A = Args.getLastArg(OPT_x)) {
813    DashX = llvm::StringSwitch<InputKind>(A->getValue())
814      .Case("c", IK_C)
815      .Case("cl", IK_OpenCL)
816      .Case("cuda", IK_CUDA)
817      .Case("c++", IK_CXX)
818      .Case("objective-c", IK_ObjC)
819      .Case("objective-c++", IK_ObjCXX)
820      .Case("cpp-output", IK_PreprocessedC)
821      .Case("assembler-with-cpp", IK_Asm)
822      .Case("c++-cpp-output", IK_PreprocessedCXX)
823      .Case("objective-c-cpp-output", IK_PreprocessedObjC)
824      .Case("objc-cpp-output", IK_PreprocessedObjC)
825      .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
826      .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
827      .Case("c-header", IK_C)
828      .Case("cl-header", IK_OpenCL)
829      .Case("objective-c-header", IK_ObjC)
830      .Case("c++-header", IK_CXX)
831      .Case("objective-c++-header", IK_ObjCXX)
832      .Cases("ast", "pcm", IK_AST)
833      .Case("ir", IK_LLVM_IR)
834      .Default(IK_None);
835    if (DashX == IK_None)
836      Diags.Report(diag::err_drv_invalid_value)
837        << A->getAsString(Args) << A->getValue();
838  }
839
840  // '-' is the default input if none is given.
841  std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
842  Opts.Inputs.clear();
843  if (Inputs.empty())
844    Inputs.push_back("-");
845  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
846    InputKind IK = DashX;
847    if (IK == IK_None) {
848      IK = FrontendOptions::getInputKindForExtension(
849        StringRef(Inputs[i]).rsplit('.').second);
850      // FIXME: Remove this hack.
851      if (i == 0)
852        DashX = IK;
853    }
854    Opts.Inputs.push_back(FrontendInputFile(Inputs[i], IK));
855  }
856
857  return DashX;
858}
859
860std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
861                                                 void *MainAddr) {
862  SmallString<128> P(llvm::sys::fs::getMainExecutable(Argv0, MainAddr));
863
864  if (!P.empty()) {
865    llvm::sys::path::remove_filename(P); // Remove /clang from foo/bin/clang
866    llvm::sys::path::remove_filename(P); // Remove /bin   from foo/bin
867
868    // Get foo/lib/clang/<version>/include
869    llvm::sys::path::append(P, "lib", "clang", CLANG_VERSION_STRING);
870  }
871
872  return P.str();
873}
874
875static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
876  using namespace options;
877  Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
878  Opts.Verbose = Args.hasArg(OPT_v);
879  Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
880  Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
881  Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
882  if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
883    Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
884  Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
885  Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodules_cache_path);
886  Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
887  // -fmodules implies -fmodule-maps
888  Opts.ModuleMaps = Args.hasArg(OPT_fmodule_maps) || Args.hasArg(OPT_fmodules);
889  Opts.ModuleCachePruneInterval =
890      getLastArgIntValue(Args, OPT_fmodules_prune_interval, 7 * 24 * 60 * 60);
891  Opts.ModuleCachePruneAfter =
892      getLastArgIntValue(Args, OPT_fmodules_prune_after, 31 * 24 * 60 * 60);
893  for (arg_iterator it = Args.filtered_begin(OPT_fmodules_ignore_macro),
894                    ie = Args.filtered_end();
895       it != ie; ++it) {
896    StringRef MacroDef = (*it)->getValue();
897    Opts.ModulesIgnoreMacros.insert(MacroDef.split('=').first);
898  }
899  std::vector<std::string> ModuleMapFiles =
900      Args.getAllArgValues(OPT_fmodule_map_file);
901  Opts.ModuleMapFiles.insert(ModuleMapFiles.begin(), ModuleMapFiles.end());
902
903  // Add -I..., -F..., and -index-header-map options in order.
904  bool IsIndexHeaderMap = false;
905  for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F,
906                                             OPT_index_header_map),
907       ie = Args.filtered_end(); it != ie; ++it) {
908    if ((*it)->getOption().matches(OPT_index_header_map)) {
909      // -index-header-map applies to the next -I or -F.
910      IsIndexHeaderMap = true;
911      continue;
912    }
913
914    frontend::IncludeDirGroup Group
915      = IsIndexHeaderMap? frontend::IndexHeaderMap : frontend::Angled;
916
917    Opts.AddPath((*it)->getValue(), Group,
918                 /*IsFramework=*/ (*it)->getOption().matches(OPT_F), true);
919    IsIndexHeaderMap = false;
920  }
921
922  // Add -iprefix/-iwithprefix/-iwithprefixbefore options.
923  StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
924  for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
925                                             OPT_iwithprefixbefore),
926         ie = Args.filtered_end(); it != ie; ++it) {
927    const Arg *A = *it;
928    if (A->getOption().matches(OPT_iprefix))
929      Prefix = A->getValue();
930    else if (A->getOption().matches(OPT_iwithprefix))
931      Opts.AddPath(Prefix.str() + A->getValue(),
932                   frontend::After, false, true);
933    else
934      Opts.AddPath(Prefix.str() + A->getValue(),
935                   frontend::Angled, false, true);
936  }
937
938  for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
939         ie = Args.filtered_end(); it != ie; ++it)
940    Opts.AddPath((*it)->getValue(), frontend::After, false, true);
941  for (arg_iterator it = Args.filtered_begin(OPT_iquote),
942         ie = Args.filtered_end(); it != ie; ++it)
943    Opts.AddPath((*it)->getValue(), frontend::Quoted, false, true);
944  for (arg_iterator it = Args.filtered_begin(OPT_isystem,
945         OPT_iwithsysroot), ie = Args.filtered_end(); it != ie; ++it)
946    Opts.AddPath((*it)->getValue(), frontend::System, false,
947                 !(*it)->getOption().matches(OPT_iwithsysroot));
948  for (arg_iterator it = Args.filtered_begin(OPT_iframework),
949         ie = Args.filtered_end(); it != ie; ++it)
950    Opts.AddPath((*it)->getValue(), frontend::System, true, true);
951
952  // Add the paths for the various language specific isystem flags.
953  for (arg_iterator it = Args.filtered_begin(OPT_c_isystem),
954       ie = Args.filtered_end(); it != ie; ++it)
955    Opts.AddPath((*it)->getValue(), frontend::CSystem, false, true);
956  for (arg_iterator it = Args.filtered_begin(OPT_cxx_isystem),
957       ie = Args.filtered_end(); it != ie; ++it)
958    Opts.AddPath((*it)->getValue(), frontend::CXXSystem, false, true);
959  for (arg_iterator it = Args.filtered_begin(OPT_objc_isystem),
960       ie = Args.filtered_end(); it != ie; ++it)
961    Opts.AddPath((*it)->getValue(), frontend::ObjCSystem, false,true);
962  for (arg_iterator it = Args.filtered_begin(OPT_objcxx_isystem),
963       ie = Args.filtered_end(); it != ie; ++it)
964    Opts.AddPath((*it)->getValue(), frontend::ObjCXXSystem, false, true);
965
966  // Add the internal paths from a driver that detects standard include paths.
967  for (arg_iterator I = Args.filtered_begin(OPT_internal_isystem,
968                                            OPT_internal_externc_isystem),
969                    E = Args.filtered_end();
970       I != E; ++I) {
971    frontend::IncludeDirGroup Group = frontend::System;
972    if ((*I)->getOption().matches(OPT_internal_externc_isystem))
973      Group = frontend::ExternCSystem;
974    Opts.AddPath((*I)->getValue(), Group, false, true);
975  }
976
977  // Add the path prefixes which are implicitly treated as being system headers.
978  for (arg_iterator I = Args.filtered_begin(OPT_isystem_prefix,
979                                            OPT_ino_system_prefix),
980                    E = Args.filtered_end();
981       I != E; ++I)
982    Opts.AddSystemHeaderPrefix((*I)->getValue(),
983                               (*I)->getOption().matches(OPT_isystem_prefix));
984}
985
986void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
987                                         LangStandard::Kind LangStd) {
988  // Set some properties which depend solely on the input kind; it would be nice
989  // to move these to the language standard, and have the driver resolve the
990  // input kind + language standard.
991  if (IK == IK_Asm) {
992    Opts.AsmPreprocessor = 1;
993  } else if (IK == IK_ObjC ||
994             IK == IK_ObjCXX ||
995             IK == IK_PreprocessedObjC ||
996             IK == IK_PreprocessedObjCXX) {
997    Opts.ObjC1 = Opts.ObjC2 = 1;
998  }
999
1000  if (LangStd == LangStandard::lang_unspecified) {
1001    // Based on the base language, pick one.
1002    switch (IK) {
1003    case IK_None:
1004    case IK_AST:
1005    case IK_LLVM_IR:
1006      llvm_unreachable("Invalid input kind!");
1007    case IK_OpenCL:
1008      LangStd = LangStandard::lang_opencl;
1009      break;
1010    case IK_CUDA:
1011      LangStd = LangStandard::lang_cuda;
1012      break;
1013    case IK_Asm:
1014    case IK_C:
1015    case IK_PreprocessedC:
1016    case IK_ObjC:
1017    case IK_PreprocessedObjC:
1018      LangStd = LangStandard::lang_gnu99;
1019      break;
1020    case IK_CXX:
1021    case IK_PreprocessedCXX:
1022    case IK_ObjCXX:
1023    case IK_PreprocessedObjCXX:
1024      LangStd = LangStandard::lang_gnucxx98;
1025      break;
1026    }
1027  }
1028
1029  const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1030  Opts.LineComment = Std.hasLineComments();
1031  Opts.C99 = Std.isC99();
1032  Opts.C11 = Std.isC11();
1033  Opts.CPlusPlus = Std.isCPlusPlus();
1034  Opts.CPlusPlus11 = Std.isCPlusPlus11();
1035  Opts.CPlusPlus1y = Std.isCPlusPlus1y();
1036  Opts.Digraphs = Std.hasDigraphs();
1037  Opts.GNUMode = Std.isGNUMode();
1038  Opts.GNUInline = !Std.isC99();
1039  Opts.HexFloats = Std.hasHexFloats();
1040  Opts.ImplicitInt = Std.hasImplicitInt();
1041
1042  // Set OpenCL Version.
1043  if (LangStd == LangStandard::lang_opencl) {
1044    Opts.OpenCL = 1;
1045    Opts.OpenCLVersion = 100;
1046  }
1047  else if (LangStd == LangStandard::lang_opencl11) {
1048      Opts.OpenCL = 1;
1049      Opts.OpenCLVersion = 110;
1050  }
1051  else if (LangStd == LangStandard::lang_opencl12) {
1052    Opts.OpenCL = 1;
1053    Opts.OpenCLVersion = 120;
1054  }
1055
1056  // OpenCL has some additional defaults.
1057  if (Opts.OpenCL) {
1058    Opts.AltiVec = 0;
1059    Opts.CXXOperatorNames = 1;
1060    Opts.LaxVectorConversions = 0;
1061    Opts.DefaultFPContract = 1;
1062    Opts.NativeHalfType = 1;
1063  }
1064
1065  if (LangStd == LangStandard::lang_cuda)
1066    Opts.CUDA = 1;
1067
1068  // OpenCL and C++ both have bool, true, false keywords.
1069  Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1070
1071  // C++ has wchar_t keyword.
1072  Opts.WChar = Opts.CPlusPlus;
1073
1074  Opts.GNUKeywords = Opts.GNUMode;
1075  Opts.CXXOperatorNames = Opts.CPlusPlus;
1076
1077  // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1078  // is specified, or -std is set to a conforming mode.
1079  Opts.Trigraphs = !Opts.GNUMode;
1080
1081  Opts.DollarIdents = !Opts.AsmPreprocessor;
1082}
1083
1084/// Attempt to parse a visibility value out of the given argument.
1085static Visibility parseVisibility(Arg *arg, ArgList &args,
1086                                  DiagnosticsEngine &diags) {
1087  StringRef value = arg->getValue();
1088  if (value == "default") {
1089    return DefaultVisibility;
1090  } else if (value == "hidden") {
1091    return HiddenVisibility;
1092  } else if (value == "protected") {
1093    // FIXME: diagnose if target does not support protected visibility
1094    return ProtectedVisibility;
1095  }
1096
1097  diags.Report(diag::err_drv_invalid_value)
1098    << arg->getAsString(args) << value;
1099  return DefaultVisibility;
1100}
1101
1102static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1103                          DiagnosticsEngine &Diags) {
1104  // FIXME: Cleanup per-file based stuff.
1105  LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1106  if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1107    LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1108#define LANGSTANDARD(id, name, desc, features) \
1109      .Case(name, LangStandard::lang_##id)
1110#include "clang/Frontend/LangStandards.def"
1111      .Default(LangStandard::lang_unspecified);
1112    if (LangStd == LangStandard::lang_unspecified)
1113      Diags.Report(diag::err_drv_invalid_value)
1114        << A->getAsString(Args) << A->getValue();
1115    else {
1116      // Valid standard, check to make sure language and standard are compatable.
1117      const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1118      switch (IK) {
1119      case IK_C:
1120      case IK_ObjC:
1121      case IK_PreprocessedC:
1122      case IK_PreprocessedObjC:
1123        if (!(Std.isC89() || Std.isC99()))
1124          Diags.Report(diag::err_drv_argument_not_allowed_with)
1125            << A->getAsString(Args) << "C/ObjC";
1126        break;
1127      case IK_CXX:
1128      case IK_ObjCXX:
1129      case IK_PreprocessedCXX:
1130      case IK_PreprocessedObjCXX:
1131        if (!Std.isCPlusPlus())
1132          Diags.Report(diag::err_drv_argument_not_allowed_with)
1133            << A->getAsString(Args) << "C++/ObjC++";
1134        break;
1135      case IK_OpenCL:
1136        if (!Std.isC99())
1137          Diags.Report(diag::err_drv_argument_not_allowed_with)
1138            << A->getAsString(Args) << "OpenCL";
1139        break;
1140      case IK_CUDA:
1141        if (!Std.isCPlusPlus())
1142          Diags.Report(diag::err_drv_argument_not_allowed_with)
1143            << A->getAsString(Args) << "CUDA";
1144        break;
1145      default:
1146        break;
1147      }
1148    }
1149  }
1150
1151  // -cl-std only applies for OpenCL language standards.
1152  // Override the -std option in this case.
1153  if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1154    LangStandard::Kind OpenCLLangStd
1155    = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1156    .Case("CL", LangStandard::lang_opencl)
1157    .Case("CL1.1", LangStandard::lang_opencl11)
1158    .Case("CL1.2", LangStandard::lang_opencl12)
1159    .Default(LangStandard::lang_unspecified);
1160
1161    if (OpenCLLangStd == LangStandard::lang_unspecified) {
1162      Diags.Report(diag::err_drv_invalid_value)
1163      << A->getAsString(Args) << A->getValue();
1164    }
1165    else
1166      LangStd = OpenCLLangStd;
1167  }
1168
1169  CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1170
1171  // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1172  // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1173  // while a subset (the non-C++ GNU keywords) is provided by GCC's
1174  // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1175  // name, as it doesn't seem a useful distinction.
1176  Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1177                                  Opts.GNUKeywords);
1178
1179  if (Args.hasArg(OPT_fno_operator_names))
1180    Opts.CXXOperatorNames = 0;
1181
1182  if (Opts.ObjC1) {
1183    if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1184      StringRef value = arg->getValue();
1185      if (Opts.ObjCRuntime.tryParse(value))
1186        Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1187    }
1188
1189    if (Args.hasArg(OPT_fobjc_gc_only))
1190      Opts.setGC(LangOptions::GCOnly);
1191    else if (Args.hasArg(OPT_fobjc_gc))
1192      Opts.setGC(LangOptions::HybridGC);
1193    else if (Args.hasArg(OPT_fobjc_arc)) {
1194      Opts.ObjCAutoRefCount = 1;
1195      if (!Opts.ObjCRuntime.allowsARC())
1196        Diags.Report(diag::err_arc_unsupported_on_runtime);
1197
1198      // Only set ObjCARCWeak if ARC is enabled.
1199      if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1200        Opts.ObjCARCWeak = 1;
1201      else
1202        Opts.ObjCARCWeak = Opts.ObjCRuntime.allowsWeak();
1203    }
1204
1205    if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1206      Opts.ObjCInferRelatedResultType = 0;
1207  }
1208
1209  if (Args.hasArg(OPT_fgnu89_inline))
1210    Opts.GNUInline = 1;
1211
1212  if (Args.hasArg(OPT_fapple_kext)) {
1213    if (!Opts.CPlusPlus)
1214      Diags.Report(diag::warn_c_kext);
1215    else
1216      Opts.AppleKext = 1;
1217  }
1218
1219  if (Args.hasArg(OPT_print_ivar_layout))
1220    Opts.ObjCGCBitmapPrint = 1;
1221  if (Args.hasArg(OPT_fno_constant_cfstrings))
1222    Opts.NoConstantCFStrings = 1;
1223
1224  if (Args.hasArg(OPT_faltivec))
1225    Opts.AltiVec = 1;
1226
1227  if (Args.hasArg(OPT_pthread))
1228    Opts.POSIXThreads = 1;
1229
1230  // The value-visibility mode defaults to "default".
1231  if (Arg *visOpt = Args.getLastArg(OPT_fvisibility)) {
1232    Opts.setValueVisibilityMode(parseVisibility(visOpt, Args, Diags));
1233  } else {
1234    Opts.setValueVisibilityMode(DefaultVisibility);
1235  }
1236
1237  // The type-visibility mode defaults to the value-visibility mode.
1238  if (Arg *typeVisOpt = Args.getLastArg(OPT_ftype_visibility)) {
1239    Opts.setTypeVisibilityMode(parseVisibility(typeVisOpt, Args, Diags));
1240  } else {
1241    Opts.setTypeVisibilityMode(Opts.getValueVisibilityMode());
1242  }
1243
1244  if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1245    Opts.InlineVisibilityHidden = 1;
1246
1247  if (Args.hasArg(OPT_ftrapv)) {
1248    Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1249    // Set the handler, if one is specified.
1250    Opts.OverflowHandler =
1251        Args.getLastArgValue(OPT_ftrapv_handler);
1252  }
1253  else if (Args.hasArg(OPT_fwrapv))
1254    Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1255
1256  if (Args.hasArg(OPT_trigraphs))
1257    Opts.Trigraphs = 1;
1258
1259  Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1260                                   OPT_fno_dollars_in_identifiers,
1261                                   Opts.DollarIdents);
1262  Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1263  Opts.MicrosoftExt
1264    = Args.hasArg(OPT_fms_extensions) || Args.hasArg(OPT_fms_compatibility);
1265  Opts.MicrosoftMode = Args.hasArg(OPT_fms_compatibility);
1266  Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
1267  Opts.MSCVersion = getLastArgIntValue(Args, OPT_fmsc_version, 0, Diags);
1268  Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1269  Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1270  Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
1271                                   Opts.ConstStrings);
1272  if (Args.hasArg(OPT_fno_lax_vector_conversions))
1273    Opts.LaxVectorConversions = 0;
1274  if (Args.hasArg(OPT_fno_threadsafe_statics))
1275    Opts.ThreadsafeStatics = 0;
1276  Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1277  Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
1278  Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
1279  Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1280  Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
1281
1282  Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1283  Opts.Blocks = Args.hasArg(OPT_fblocks);
1284  Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
1285  Opts.Modules = Args.hasArg(OPT_fmodules);
1286  Opts.ModulesDeclUse = Args.hasArg(OPT_fmodules_decluse);
1287  Opts.CharIsSigned = Opts.OpenCL || !Args.hasArg(OPT_fno_signed_char);
1288  Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
1289  Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1290  Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1291  Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1292  Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1293  Opts.NoMathBuiltin = Args.hasArg(OPT_fno_math_builtin);
1294  Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1295  Opts.SizedDeallocation = Args.hasArg(OPT_fsized_deallocation);
1296  Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1297  Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1298  Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1299  Opts.MathErrno = !Opts.OpenCL && Args.hasArg(OPT_fmath_errno);
1300  Opts.InstantiationDepth =
1301      getLastArgIntValue(Args, OPT_ftemplate_depth, 256, Diags);
1302  Opts.ConstexprCallDepth =
1303      getLastArgIntValue(Args, OPT_fconstexpr_depth, 512, Diags);
1304  Opts.ConstexprStepLimit =
1305      getLastArgIntValue(Args, OPT_fconstexpr_steps, 1048576, Diags);
1306  Opts.BracketDepth = getLastArgIntValue(Args, OPT_fbracket_depth, 256, Diags);
1307  Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
1308  Opts.NumLargeByValueCopy =
1309      getLastArgIntValue(Args, OPT_Wlarge_by_value_copy_EQ, 0, Diags);
1310  Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
1311  Opts.ObjCConstantStringClass =
1312    Args.getLastArgValue(OPT_fconstant_string_class);
1313  Opts.ObjCDefaultSynthProperties =
1314    !Args.hasArg(OPT_disable_objc_default_synthesize_properties);
1315  Opts.EncodeExtendedBlockSig =
1316    Args.hasArg(OPT_fencode_extended_block_signature);
1317  Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1318  Opts.PackStruct = getLastArgIntValue(Args, OPT_fpack_struct_EQ, 0, Diags);
1319  Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
1320  Opts.PIELevel = getLastArgIntValue(Args, OPT_pie_level, 0, Diags);
1321  Opts.Static = Args.hasArg(OPT_static_define);
1322  Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
1323  Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
1324                        || Args.hasArg(OPT_fdump_record_layouts);
1325  Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1326  Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1327  Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1328  Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
1329  Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
1330  Opts.MRTD = Args.hasArg(OPT_mrtd);
1331  Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
1332  Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
1333  Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
1334  Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
1335  Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
1336  Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
1337  Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
1338  Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
1339
1340  if (Arg *A = Args.getLastArg(OPT_faddress_space_map_mangling_EQ)) {
1341    switch (llvm::StringSwitch<unsigned>(A->getValue())
1342      .Case("target", LangOptions::ASMM_Target)
1343      .Case("no", LangOptions::ASMM_Off)
1344      .Case("yes", LangOptions::ASMM_On)
1345      .Default(255)) {
1346    default:
1347      Diags.Report(diag::err_drv_invalid_value)
1348        << "-faddress-space-map-mangling=" << A->getValue();
1349      break;
1350    case LangOptions::ASMM_Target:
1351      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Target);
1352      break;
1353    case LangOptions::ASMM_On:
1354      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_On);
1355      break;
1356    case LangOptions::ASMM_Off:
1357      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Off);
1358      break;
1359    }
1360  }
1361
1362  // Check if -fopenmp is specified.
1363  Opts.OpenMP = Args.hasArg(OPT_fopenmp);
1364
1365  // Record whether the __DEPRECATED define was requested.
1366  Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
1367                                 OPT_fno_deprecated_macro,
1368                                 Opts.Deprecated);
1369
1370  // FIXME: Eliminate this dependency.
1371  unsigned Opt = getOptimizationLevel(Args, IK, Diags),
1372       OptSize = getOptimizationLevelSize(Args);
1373  Opts.Optimize = Opt != 0;
1374  Opts.OptimizeSize = OptSize != 0;
1375
1376  // This is the __NO_INLINE__ define, which just depends on things like the
1377  // optimization level and -fno-inline, not actually whether the backend has
1378  // inlining enabled.
1379  Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
1380
1381  Opts.FastMath = Args.hasArg(OPT_ffast_math);
1382  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only);
1383
1384  Opts.RetainCommentsFromSystemHeaders =
1385      Args.hasArg(OPT_fretain_comments_from_system_headers);
1386
1387  unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
1388  switch (SSP) {
1389  default:
1390    Diags.Report(diag::err_drv_invalid_value)
1391      << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1392    break;
1393  case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
1394  case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
1395  case 2: Opts.setStackProtector(LangOptions::SSPReq); break;
1396  }
1397
1398  // Parse -fsanitize= arguments.
1399  std::vector<std::string> Sanitizers = Args.getAllArgValues(OPT_fsanitize_EQ);
1400  for (unsigned I = 0, N = Sanitizers.size(); I != N; ++I) {
1401    // Since the Opts.Sanitize* values are bitfields, it's a little tricky to
1402    // efficiently map string values to them. Perform the mapping indirectly:
1403    // convert strings to enumerated values, then switch over the enum to set
1404    // the right bitfield value.
1405    enum Sanitizer {
1406#define SANITIZER(NAME, ID) \
1407      ID,
1408#include "clang/Basic/Sanitizers.def"
1409      Unknown
1410    };
1411    switch (llvm::StringSwitch<unsigned>(Sanitizers[I])
1412#define SANITIZER(NAME, ID) \
1413              .Case(NAME, ID)
1414#include "clang/Basic/Sanitizers.def"
1415              .Default(Unknown)) {
1416#define SANITIZER(NAME, ID) \
1417    case ID: \
1418      Opts.Sanitize.ID = true; \
1419      break;
1420#include "clang/Basic/Sanitizers.def"
1421
1422    case Unknown:
1423      Diags.Report(diag::err_drv_invalid_value)
1424        << "-fsanitize=" << Sanitizers[I];
1425      break;
1426    }
1427  }
1428}
1429
1430static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1431                                  FileManager &FileMgr,
1432                                  DiagnosticsEngine &Diags) {
1433  using namespace options;
1434  Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1435  Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1436  if (const Arg *A = Args.getLastArg(OPT_token_cache))
1437      Opts.TokenCache = A->getValue();
1438  else
1439    Opts.TokenCache = Opts.ImplicitPTHInclude;
1440  Opts.UsePredefines = !Args.hasArg(OPT_undef);
1441  Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1442  Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1443
1444  Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
1445  for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
1446         ie = Args.filtered_end(); it != ie; ++it) {
1447    const Arg *A = *it;
1448    Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
1449  }
1450
1451  if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1452    StringRef Value(A->getValue());
1453    size_t Comma = Value.find(',');
1454    unsigned Bytes = 0;
1455    unsigned EndOfLine = 0;
1456
1457    if (Comma == StringRef::npos ||
1458        Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1459        Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1460      Diags.Report(diag::err_drv_preamble_format);
1461    else {
1462      Opts.PrecompiledPreambleBytes.first = Bytes;
1463      Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1464    }
1465  }
1466
1467  // Add macros from the command line.
1468  for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1469         ie = Args.filtered_end(); it != ie; ++it) {
1470    if ((*it)->getOption().matches(OPT_D))
1471      Opts.addMacroDef((*it)->getValue());
1472    else
1473      Opts.addMacroUndef((*it)->getValue());
1474  }
1475
1476  Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1477
1478  // Add the ordered list of -includes.
1479  for (arg_iterator it = Args.filtered_begin(OPT_include),
1480         ie = Args.filtered_end(); it != ie; ++it) {
1481    const Arg *A = *it;
1482    Opts.Includes.push_back(A->getValue());
1483  }
1484
1485  for (arg_iterator it = Args.filtered_begin(OPT_chain_include),
1486         ie = Args.filtered_end(); it != ie; ++it) {
1487    const Arg *A = *it;
1488    Opts.ChainedIncludes.push_back(A->getValue());
1489  }
1490
1491  // Include 'altivec.h' if -faltivec option present
1492  if (Args.hasArg(OPT_faltivec))
1493    Opts.Includes.push_back("altivec.h");
1494
1495  for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1496         ie = Args.filtered_end(); it != ie; ++it) {
1497    const Arg *A = *it;
1498    std::pair<StringRef,StringRef> Split =
1499      StringRef(A->getValue()).split(';');
1500
1501    if (Split.second.empty()) {
1502      Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1503      continue;
1504    }
1505
1506    Opts.addRemappedFile(Split.first, Split.second);
1507  }
1508
1509  if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
1510    StringRef Name = A->getValue();
1511    unsigned Library = llvm::StringSwitch<unsigned>(Name)
1512      .Case("libc++", ARCXX_libcxx)
1513      .Case("libstdc++", ARCXX_libstdcxx)
1514      .Case("none", ARCXX_nolib)
1515      .Default(~0U);
1516    if (Library == ~0U)
1517      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1518    else
1519      Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
1520  }
1521}
1522
1523static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1524                                        ArgList &Args,
1525                                        frontend::ActionKind Action) {
1526  using namespace options;
1527
1528  switch (Action) {
1529  case frontend::ASTDeclList:
1530  case frontend::ASTDump:
1531  case frontend::ASTDumpXML:
1532  case frontend::ASTPrint:
1533  case frontend::ASTView:
1534  case frontend::EmitAssembly:
1535  case frontend::EmitBC:
1536  case frontend::EmitHTML:
1537  case frontend::EmitLLVM:
1538  case frontend::EmitLLVMOnly:
1539  case frontend::EmitCodeGenOnly:
1540  case frontend::EmitObj:
1541  case frontend::FixIt:
1542  case frontend::GenerateModule:
1543  case frontend::GeneratePCH:
1544  case frontend::GeneratePTH:
1545  case frontend::ParseSyntaxOnly:
1546  case frontend::ModuleFileInfo:
1547  case frontend::PluginAction:
1548  case frontend::PrintDeclContext:
1549  case frontend::RewriteObjC:
1550  case frontend::RewriteTest:
1551  case frontend::RunAnalysis:
1552  case frontend::MigrateSource:
1553    Opts.ShowCPP = 0;
1554    break;
1555
1556  case frontend::DumpRawTokens:
1557  case frontend::DumpTokens:
1558  case frontend::InitOnly:
1559  case frontend::PrintPreamble:
1560  case frontend::PrintPreprocessedInput:
1561  case frontend::RewriteMacros:
1562  case frontend::RunPreprocessorOnly:
1563    Opts.ShowCPP = !Args.hasArg(OPT_dM);
1564    break;
1565  }
1566
1567  Opts.ShowComments = Args.hasArg(OPT_C);
1568  Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1569  Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1570  Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1571  Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
1572}
1573
1574static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1575  using namespace options;
1576  Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1577  Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
1578  Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1579  Opts.FPMath = Args.getLastArgValue(OPT_mfpmath);
1580  Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
1581  Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1582  Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1583
1584  // Use the default target triple if unspecified.
1585  if (Opts.Triple.empty())
1586    Opts.Triple = llvm::sys::getDefaultTargetTriple();
1587}
1588
1589//
1590
1591bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1592                                        const char *const *ArgBegin,
1593                                        const char *const *ArgEnd,
1594                                        DiagnosticsEngine &Diags) {
1595  bool Success = true;
1596
1597  // Parse the arguments.
1598  OwningPtr<OptTable> Opts(createDriverOptTable());
1599  const unsigned IncludedFlagsBitmask = options::CC1Option;
1600  unsigned MissingArgIndex, MissingArgCount;
1601  OwningPtr<InputArgList> Args(
1602    Opts->ParseArgs(ArgBegin, ArgEnd, MissingArgIndex, MissingArgCount,
1603                    IncludedFlagsBitmask));
1604
1605  // Check for missing argument error.
1606  if (MissingArgCount) {
1607    Diags.Report(diag::err_drv_missing_argument)
1608      << Args->getArgString(MissingArgIndex) << MissingArgCount;
1609    Success = false;
1610  }
1611
1612  // Issue errors on unknown arguments.
1613  for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1614         ie = Args->filtered_end(); it != ie; ++it) {
1615    Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
1616    Success = false;
1617  }
1618
1619  Success = ParseAnalyzerArgs(*Res.getAnalyzerOpts(), *Args, Diags) && Success;
1620  Success = ParseMigratorArgs(Res.getMigratorOpts(), *Args) && Success;
1621  ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1622  Success = ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, &Diags)
1623            && Success;
1624  ParseCommentArgs(Res.getLangOpts()->CommentOpts, *Args);
1625  ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
1626  // FIXME: We shouldn't have to pass the DashX option around here
1627  InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1628  Success = ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags)
1629            && Success;
1630  ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1631  if (DashX != IK_AST && DashX != IK_LLVM_IR) {
1632    ParseLangArgs(*Res.getLangOpts(), *Args, DashX, Diags);
1633    if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
1634      Res.getLangOpts()->ObjCExceptions = 1;
1635  }
1636  // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
1637  // PCH file and find the original header name. Remove the need to do that in
1638  // ParsePreprocessorArgs and remove the FileManager
1639  // parameters from the function and the "FileManager.h" #include.
1640  FileManager FileMgr(Res.getFileSystemOpts());
1641  ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
1642  ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args,
1643                              Res.getFrontendOpts().ProgramAction);
1644  ParseTargetArgs(Res.getTargetOpts(), *Args);
1645
1646  return Success;
1647}
1648
1649namespace {
1650
1651  class ModuleSignature {
1652    SmallVector<uint64_t, 16> Data;
1653    unsigned CurBit;
1654    uint64_t CurValue;
1655
1656  public:
1657    ModuleSignature() : CurBit(0), CurValue(0) { }
1658
1659    void add(uint64_t Value, unsigned Bits);
1660    void add(StringRef Value);
1661    void flush();
1662
1663    llvm::APInt getAsInteger() const;
1664  };
1665}
1666
1667void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
1668  CurValue |= Value << CurBit;
1669  if (CurBit + NumBits < 64) {
1670    CurBit += NumBits;
1671    return;
1672  }
1673
1674  // Add the current word.
1675  Data.push_back(CurValue);
1676
1677  if (CurBit)
1678    CurValue = Value >> (64-CurBit);
1679  else
1680    CurValue = 0;
1681  CurBit = (CurBit+NumBits) & 63;
1682}
1683
1684void ModuleSignature::flush() {
1685  if (CurBit == 0)
1686    return;
1687
1688  Data.push_back(CurValue);
1689  CurBit = 0;
1690  CurValue = 0;
1691}
1692
1693void ModuleSignature::add(StringRef Value) {
1694  for (StringRef::iterator I = Value.begin(), IEnd = Value.end(); I != IEnd;++I)
1695    add(*I, 8);
1696}
1697
1698llvm::APInt ModuleSignature::getAsInteger() const {
1699  return llvm::APInt(Data.size() * 64, Data);
1700}
1701
1702std::string CompilerInvocation::getModuleHash() const {
1703  // Note: For QoI reasons, the things we use as a hash here should all be
1704  // dumped via the -module-info flag.
1705  using llvm::hash_code;
1706  using llvm::hash_value;
1707  using llvm::hash_combine;
1708
1709  // Start the signature with the compiler version.
1710  // FIXME: We'd rather use something more cryptographically sound than
1711  // CityHash, but this will do for now.
1712  hash_code code = hash_value(getClangFullRepositoryVersion());
1713
1714  // Extend the signature with the language options
1715#define LANGOPT(Name, Bits, Default, Description) \
1716   code = hash_combine(code, LangOpts->Name);
1717#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
1718  code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
1719#define BENIGN_LANGOPT(Name, Bits, Default, Description)
1720#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
1721#include "clang/Basic/LangOptions.def"
1722
1723  // Extend the signature with the target options.
1724  code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
1725                      TargetOpts->ABI, TargetOpts->CXXABI,
1726                      TargetOpts->LinkerVersion);
1727  for (unsigned i = 0, n = TargetOpts->FeaturesAsWritten.size(); i != n; ++i)
1728    code = hash_combine(code, TargetOpts->FeaturesAsWritten[i]);
1729
1730  // Extend the signature with preprocessor options.
1731  const PreprocessorOptions &ppOpts = getPreprocessorOpts();
1732  const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
1733  code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
1734
1735  std::vector<StringRef> MacroDefs;
1736  for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
1737            I = getPreprocessorOpts().Macros.begin(),
1738         IEnd = getPreprocessorOpts().Macros.end();
1739       I != IEnd; ++I) {
1740    // If we're supposed to ignore this macro for the purposes of modules,
1741    // don't put it into the hash.
1742    if (!hsOpts.ModulesIgnoreMacros.empty()) {
1743      // Check whether we're ignoring this macro.
1744      StringRef MacroDef = I->first;
1745      if (hsOpts.ModulesIgnoreMacros.count(MacroDef.split('=').first))
1746        continue;
1747    }
1748
1749    code = hash_combine(code, I->first, I->second);
1750  }
1751
1752  // Extend the signature with the sysroot.
1753  code = hash_combine(code, hsOpts.Sysroot, hsOpts.UseBuiltinIncludes,
1754                      hsOpts.UseStandardSystemIncludes,
1755                      hsOpts.UseStandardCXXIncludes,
1756                      hsOpts.UseLibcxx);
1757
1758  // Darwin-specific hack: if we have a sysroot, use the contents and
1759  // modification time of
1760  //   $sysroot/System/Library/CoreServices/SystemVersion.plist
1761  // as part of the module hash.
1762  if (!hsOpts.Sysroot.empty()) {
1763    llvm::OwningPtr<llvm::MemoryBuffer> buffer;
1764    SmallString<128> systemVersionFile;
1765    systemVersionFile += hsOpts.Sysroot;
1766    llvm::sys::path::append(systemVersionFile, "System");
1767    llvm::sys::path::append(systemVersionFile, "Library");
1768    llvm::sys::path::append(systemVersionFile, "CoreServices");
1769    llvm::sys::path::append(systemVersionFile, "SystemVersion.plist");
1770    if (!llvm::MemoryBuffer::getFile(systemVersionFile, buffer)) {
1771      code = hash_combine(code, buffer.get()->getBuffer());
1772
1773      struct stat statBuf;
1774      if (stat(systemVersionFile.c_str(), &statBuf) == 0)
1775        code = hash_combine(code, statBuf.st_mtime);
1776    }
1777  }
1778
1779  return llvm::APInt(64, code).toString(36, /*Signed=*/false);
1780}
1781
1782namespace clang {
1783
1784// Declared in clang/Frontend/Utils.h.
1785int getLastArgIntValue(const ArgList &Args, OptSpecifier Id, int Default,
1786                       DiagnosticsEngine *Diags) {
1787  int Res = Default;
1788  if (Arg *A = Args.getLastArg(Id)) {
1789    if (StringRef(A->getValue()).getAsInteger(10, Res)) {
1790      if (Diags)
1791        Diags->Report(diag::err_drv_invalid_int_value) << A->getAsString(Args)
1792                                                       << A->getValue();
1793    }
1794  }
1795  return Res;
1796}
1797}
1798