CompilerInvocation.cpp revision 5b98aba1d74184923da32016c3abbc20e9a7686d 
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/system_error.h"
36#include <sys/stat.h>
37using namespace clang;
38
39//===----------------------------------------------------------------------===//
40// Initialization.
41//===----------------------------------------------------------------------===//
42
43CompilerInvocationBase::CompilerInvocationBase()
44  : LangOpts(new LangOptions()), TargetOpts(new TargetOptions()),
45    DiagnosticOpts(new DiagnosticOptions()),
46    HeaderSearchOpts(new HeaderSearchOptions()),
47    PreprocessorOpts(new PreprocessorOptions()) {}
48
49CompilerInvocationBase::CompilerInvocationBase(const CompilerInvocationBase &X)
50  : RefCountedBase<CompilerInvocation>(),
51    LangOpts(new LangOptions(*X.getLangOpts())),
52    TargetOpts(new TargetOptions(X.getTargetOpts())),
53    DiagnosticOpts(new DiagnosticOptions(X.getDiagnosticOpts())),
54    HeaderSearchOpts(new HeaderSearchOptions(X.getHeaderSearchOpts())),
55    PreprocessorOpts(new PreprocessorOptions(X.getPreprocessorOpts())) {}
56
57//===----------------------------------------------------------------------===//
58// Deserialization (from args)
59//===----------------------------------------------------------------------===//
60
61using namespace clang::driver;
62using namespace clang::driver::options;
63using namespace llvm::opt;
64
65//
66
67static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
68                                     DiagnosticsEngine &Diags) {
69  unsigned DefaultOpt = 0;
70  if (IK == IK_OpenCL && !Args.hasArg(OPT_cl_opt_disable))
71    DefaultOpt = 2;
72
73  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
74    if (A->getOption().matches(options::OPT_O0))
75      return 0;
76
77    if (A->getOption().matches(options::OPT_Ofast))
78      return 3;
79
80    assert (A->getOption().matches(options::OPT_O));
81
82    StringRef S(A->getValue());
83    if (S == "s" || S == "z" || S.empty())
84      return 2;
85
86    return getLastArgIntValue(Args, OPT_O, DefaultOpt, Diags);
87  }
88
89  return DefaultOpt;
90}
91
92static unsigned getOptimizationLevelSize(ArgList &Args) {
93  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
94    if (A->getOption().matches(options::OPT_O)) {
95      switch (A->getValue()[0]) {
96      default:
97        return 0;
98      case 's':
99        return 1;
100      case 'z':
101        return 2;
102      }
103    }
104  }
105  return 0;
106}
107
108static void addWarningArgs(ArgList &Args, std::vector<std::string> &Warnings) {
109  for (arg_iterator I = Args.filtered_begin(OPT_W_Group),
110         E = Args.filtered_end(); I != E; ++I) {
111    Arg *A = *I;
112    // If the argument is a pure flag, add its name (minus the "W" at the beginning)
113    // to the warning list. Else, add its value (for the OPT_W case).
114    if (A->getOption().getKind() == Option::FlagClass) {
115      Warnings.push_back(A->getOption().getName().substr(1));
116    } else {
117      for (unsigned Idx = 0, End = A->getNumValues();
118           Idx < End; ++Idx) {
119        StringRef V = A->getValue(Idx);
120        // "-Wl," and such are not warning options.
121        // FIXME: Should be handled by putting these in separate flags.
122        if (V.startswith("l,") || V.startswith("a,") || V.startswith("p,"))
123          continue;
124
125        Warnings.push_back(V);
126      }
127    }
128  }
129}
130
131static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
132                              DiagnosticsEngine &Diags) {
133  using namespace options;
134  bool Success = true;
135  if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
136    StringRef Name = A->getValue();
137    AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
138#define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
139      .Case(CMDFLAG, NAME##Model)
140#include "clang/StaticAnalyzer/Core/Analyses.def"
141      .Default(NumStores);
142    if (Value == NumStores) {
143      Diags.Report(diag::err_drv_invalid_value)
144        << A->getAsString(Args) << Name;
145      Success = false;
146    } else {
147      Opts.AnalysisStoreOpt = Value;
148    }
149  }
150
151  if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
152    StringRef Name = A->getValue();
153    AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
154#define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
155      .Case(CMDFLAG, NAME##Model)
156#include "clang/StaticAnalyzer/Core/Analyses.def"
157      .Default(NumConstraints);
158    if (Value == NumConstraints) {
159      Diags.Report(diag::err_drv_invalid_value)
160        << A->getAsString(Args) << Name;
161      Success = false;
162    } else {
163      Opts.AnalysisConstraintsOpt = Value;
164    }
165  }
166
167  if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
168    StringRef Name = A->getValue();
169    AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
170#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN) \
171      .Case(CMDFLAG, PD_##NAME)
172#include "clang/StaticAnalyzer/Core/Analyses.def"
173      .Default(NUM_ANALYSIS_DIAG_CLIENTS);
174    if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
175      Diags.Report(diag::err_drv_invalid_value)
176        << A->getAsString(Args) << Name;
177      Success = false;
178    } else {
179      Opts.AnalysisDiagOpt = Value;
180    }
181  }
182
183  if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
184    StringRef Name = A->getValue();
185    AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
186#define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
187      .Case(CMDFLAG, NAME)
188#include "clang/StaticAnalyzer/Core/Analyses.def"
189      .Default(NumPurgeModes);
190    if (Value == NumPurgeModes) {
191      Diags.Report(diag::err_drv_invalid_value)
192        << A->getAsString(Args) << Name;
193      Success = false;
194    } else {
195      Opts.AnalysisPurgeOpt = Value;
196    }
197  }
198
199  if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
200    StringRef Name = A->getValue();
201    AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
202#define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
203      .Case(CMDFLAG, NAME)
204#include "clang/StaticAnalyzer/Core/Analyses.def"
205      .Default(NumInliningModes);
206    if (Value == NumInliningModes) {
207      Diags.Report(diag::err_drv_invalid_value)
208        << A->getAsString(Args) << Name;
209      Success = false;
210    } else {
211      Opts.InliningMode = Value;
212    }
213  }
214
215  Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
216  Opts.visualizeExplodedGraphWithGraphViz =
217    Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
218  Opts.visualizeExplodedGraphWithUbiGraph =
219    Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
220  Opts.NoRetryExhausted = Args.hasArg(OPT_analyzer_disable_retry_exhausted);
221  Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
222  Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
223  Opts.AnalyzeNestedBlocks =
224    Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
225  Opts.eagerlyAssumeBinOpBifurcation = Args.hasArg(OPT_analyzer_eagerly_assume);
226  Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
227  Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
228  Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
229  Opts.maxBlockVisitOnPath =
230      getLastArgIntValue(Args, OPT_analyzer_max_loop, 4, Diags);
231  Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
232  Opts.InlineMaxStackDepth =
233      getLastArgIntValue(Args, OPT_analyzer_inline_max_stack_depth,
234                         Opts.InlineMaxStackDepth, Diags);
235
236  Opts.CheckersControlList.clear();
237  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_checker,
238                                             OPT_analyzer_disable_checker),
239         ie = Args.filtered_end(); it != ie; ++it) {
240    const Arg *A = *it;
241    A->claim();
242    bool enable = (A->getOption().getID() == OPT_analyzer_checker);
243    // We can have a list of comma separated checker names, e.g:
244    // '-analyzer-checker=cocoa,unix'
245    StringRef checkerList = A->getValue();
246    SmallVector<StringRef, 4> checkers;
247    checkerList.split(checkers, ",");
248    for (unsigned i = 0, e = checkers.size(); i != e; ++i)
249      Opts.CheckersControlList.push_back(std::make_pair(checkers[i], enable));
250  }
251
252  // Go through the analyzer configuration options.
253  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_config),
254       ie = Args.filtered_end(); it != ie; ++it) {
255    const Arg *A = *it;
256    A->claim();
257    // We can have a list of comma separated config names, e.g:
258    // '-analyzer-config key1=val1,key2=val2'
259    StringRef configList = A->getValue();
260    SmallVector<StringRef, 4> configVals;
261    configList.split(configVals, ",");
262    for (unsigned i = 0, e = configVals.size(); i != e; ++i) {
263      StringRef key, val;
264      llvm::tie(key, val) = configVals[i].split("=");
265      if (val.empty()) {
266        Diags.Report(SourceLocation(),
267                     diag::err_analyzer_config_no_value) << configVals[i];
268        Success = false;
269        break;
270      }
271      if (val.find('=') != StringRef::npos) {
272        Diags.Report(SourceLocation(),
273                     diag::err_analyzer_config_multiple_values)
274          << configVals[i];
275        Success = false;
276        break;
277      }
278      Opts.Config[key] = val;
279    }
280  }
281
282  return Success;
283}
284
285static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
286  Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
287  Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
288  return true;
289}
290
291static void ParseCommentArgs(CommentOptions &Opts, ArgList &Args) {
292  Opts.BlockCommandNames = Args.getAllArgValues(OPT_fcomment_block_commands);
293  Opts.ParseAllComments = Args.hasArg(OPT_fparse_all_comments);
294}
295
296static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
297                             DiagnosticsEngine &Diags) {
298  using namespace options;
299  bool Success = true;
300
301  unsigned OptLevel = getOptimizationLevel(Args, IK, Diags);
302  if (OptLevel > 3) {
303    Diags.Report(diag::err_drv_invalid_value)
304      << Args.getLastArg(OPT_O)->getAsString(Args) << OptLevel;
305    OptLevel = 3;
306    Success = false;
307  }
308  Opts.OptimizationLevel = OptLevel;
309
310  // We must always run at least the always inlining pass.
311  Opts.setInlining(
312    (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
313                                 : CodeGenOptions::OnlyAlwaysInlining);
314  // -fno-inline-functions overrides OptimizationLevel > 1.
315  Opts.NoInline = Args.hasArg(OPT_fno_inline);
316  Opts.setInlining(Args.hasArg(OPT_fno_inline_functions) ?
317                     CodeGenOptions::OnlyAlwaysInlining : Opts.getInlining());
318
319  if (Args.hasArg(OPT_gline_tables_only)) {
320    Opts.setDebugInfo(CodeGenOptions::DebugLineTablesOnly);
321  } else if (Args.hasArg(OPT_g_Flag) || Args.hasArg(OPT_gdwarf_2) ||
322             Args.hasArg(OPT_gdwarf_3) || Args.hasArg(OPT_gdwarf_4)) {
323    if (Args.hasFlag(OPT_flimit_debug_info, OPT_fno_limit_debug_info, true))
324      Opts.setDebugInfo(CodeGenOptions::LimitedDebugInfo);
325    else
326      Opts.setDebugInfo(CodeGenOptions::FullDebugInfo);
327  }
328  Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
329  Opts.SplitDwarfFile = Args.getLastArgValue(OPT_split_dwarf_file);
330  if (Args.hasArg(OPT_gdwarf_2))
331    Opts.DwarfVersion = 2;
332  else if (Args.hasArg(OPT_gdwarf_3))
333    Opts.DwarfVersion = 3;
334  else if (Args.hasArg(OPT_gdwarf_4))
335    Opts.DwarfVersion = 4;
336  else if (Opts.getDebugInfo() != CodeGenOptions::NoDebugInfo)
337    // Default Dwarf version is 3 if we are generating debug information.
338    Opts.DwarfVersion = 3;
339
340  Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
341  Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
342  Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
343  Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
344    OPT_fuse_register_sized_bitfield_access);
345  Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
346  Opts.StructPathTBAA = Args.hasArg(OPT_struct_path_tbaa);
347  Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
348  Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
349  Opts.NoCommon = Args.hasArg(OPT_fno_common);
350  Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
351  Opts.OptimizeSize = getOptimizationLevelSize(Args);
352  Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
353                            Args.hasArg(OPT_ffreestanding));
354  Opts.UnrollLoops =
355      Args.hasFlag(OPT_funroll_loops, OPT_fno_unroll_loops,
356                   (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize));
357
358  Opts.Autolink = !Args.hasArg(OPT_fno_autolink);
359  Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
360  Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
361  Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);
362  Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
363  Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
364  Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
365  Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
366  Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
367  Opts.DisableFree = Args.hasArg(OPT_disable_free);
368  Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
369  Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
370  Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
371  Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
372  Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
373  Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
374                       Args.hasArg(OPT_cl_finite_math_only)||
375                       Args.hasArg(OPT_cl_fast_relaxed_math));
376  Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
377                       Args.hasArg(OPT_cl_finite_math_only)||
378                       Args.hasArg(OPT_cl_fast_relaxed_math));
379  Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
380  Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
381  Opts.NumRegisterParameters = getLastArgIntValue(Args, OPT_mregparm, 0, Diags);
382  Opts.NoGlobalMerge = Args.hasArg(OPT_mno_global_merge);
383  Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
384  Opts.EnableSegmentedStacks = Args.hasArg(OPT_split_stacks);
385  Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
386  Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
387  Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
388  Opts.NoDwarf2CFIAsm = Args.hasArg(OPT_fno_dwarf2_cfi_asm);
389  Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
390  Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
391  Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
392  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
393                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
394                      Args.hasArg(OPT_cl_fast_relaxed_math);
395  Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
396  Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
397  Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
398  Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
399
400  Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
401  Opts.DataSections = Args.hasArg(OPT_fdata_sections);
402
403  Opts.VectorizeBB = Args.hasArg(OPT_vectorize_slp_aggressive);
404  Opts.VectorizeLoop = Args.hasArg(OPT_vectorize_loops);
405  Opts.VectorizeSLP = Args.hasArg(OPT_vectorize_slp);
406
407  Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
408  Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
409  Opts.SanitizeRecover = !Args.hasArg(OPT_fno_sanitize_recover);
410
411  Opts.DisableGCov = Args.hasArg(OPT_test_coverage);
412  Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
413  Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
414  if (Opts.EmitGcovArcs || Opts.EmitGcovNotes) {
415  Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
416    Opts.CoverageExtraChecksum = Args.hasArg(OPT_coverage_cfg_checksum);
417    Opts.CoverageNoFunctionNamesInData =
418        Args.hasArg(OPT_coverage_no_function_names_in_data);
419    if (Args.hasArg(OPT_coverage_version_EQ)) {
420      StringRef CoverageVersion = Args.getLastArgValue(OPT_coverage_version_EQ);
421      if (CoverageVersion.size() != 4) {
422        Diags.Report(diag::err_drv_invalid_value)
423            << Args.getLastArg(OPT_coverage_version_EQ)->getAsString(Args)
424            << CoverageVersion;
425      } else {
426        memcpy(Opts.CoverageVersion, CoverageVersion.data(), 4);
427      }
428    }
429  }
430
431  Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
432  Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
433  Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
434  Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
435  Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
436  Opts.SanitizerBlacklistFile = Args.getLastArgValue(OPT_fsanitize_blacklist);
437  Opts.SanitizeMemoryTrackOrigins =
438    Args.hasArg(OPT_fsanitize_memory_track_origins);
439  Opts.SanitizeAddressZeroBaseShadow =
440    Args.hasArg(OPT_fsanitize_address_zero_base_shadow);
441  Opts.SanitizeUndefinedTrapOnError =
442    Args.hasArg(OPT_fsanitize_undefined_trap_on_error);
443  Opts.SSPBufferSize =
444      getLastArgIntValue(Args, OPT_stack_protector_buffer_size, 8, Diags);
445  Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
446  if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
447    StringRef Val = A->getValue();
448    unsigned StackAlignment = Opts.StackAlignment;
449    Val.getAsInteger(10, StackAlignment);
450    Opts.StackAlignment = StackAlignment;
451  }
452
453  if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
454    StringRef Name = A->getValue();
455    unsigned Method = llvm::StringSwitch<unsigned>(Name)
456      .Case("legacy", CodeGenOptions::Legacy)
457      .Case("non-legacy", CodeGenOptions::NonLegacy)
458      .Case("mixed", CodeGenOptions::Mixed)
459      .Default(~0U);
460    if (Method == ~0U) {
461      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
462      Success = false;
463    } else {
464      Opts.setObjCDispatchMethod(
465        static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
466    }
467  }
468
469  if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
470    StringRef Name = A->getValue();
471    unsigned Model = llvm::StringSwitch<unsigned>(Name)
472        .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
473        .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
474        .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
475        .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
476        .Default(~0U);
477    if (Model == ~0U) {
478      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
479      Success = false;
480    } else {
481      Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
482    }
483  }
484
485  if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
486    StringRef Val = A->getValue();
487    if (Val == "fast")
488      Opts.setFPContractMode(CodeGenOptions::FPC_Fast);
489    else if (Val == "on")
490      Opts.setFPContractMode(CodeGenOptions::FPC_On);
491    else if (Val == "off")
492      Opts.setFPContractMode(CodeGenOptions::FPC_Off);
493    else
494      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
495  }
496
497  if (Arg *A = Args.getLastArg(OPT_fpcc_struct_return, OPT_freg_struct_return)) {
498    if (A->getOption().matches(OPT_fpcc_struct_return)) {
499      Opts.setStructReturnConvention(CodeGenOptions::SRCK_OnStack);
500    } else {
501      assert(A->getOption().matches(OPT_freg_struct_return));
502      Opts.setStructReturnConvention(CodeGenOptions::SRCK_InRegs);
503    }
504  }
505
506  Opts.DependentLibraries = Args.getAllArgValues(OPT_dependent_lib);
507
508  return Success;
509}
510
511static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
512                                      ArgList &Args) {
513  using namespace options;
514  Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
515  Opts.Targets = Args.getAllArgValues(OPT_MT);
516  Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
517  Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
518  Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
519  Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
520  Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
521  Opts.PrintShowIncludes = Args.hasArg(OPT_show_includes);
522  Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
523}
524
525bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
526                                DiagnosticsEngine *Diags) {
527  using namespace options;
528  bool Success = true;
529
530  Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
531  Opts.DiagnosticSerializationFile =
532    Args.getLastArgValue(OPT_diagnostic_serialized_file);
533  Opts.IgnoreWarnings = Args.hasArg(OPT_w);
534  Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
535  Opts.Pedantic = Args.hasArg(OPT_pedantic);
536  Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
537  Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
538  Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
539  Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
540                                 OPT_fno_show_column,
541                                 /*Default=*/true);
542  Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
543  Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
544  Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
545
546  // Default behavior is to not to show note include stacks.
547  Opts.ShowNoteIncludeStack = false;
548  if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
549                               OPT_fno_diagnostics_show_note_include_stack))
550    if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
551      Opts.ShowNoteIncludeStack = true;
552
553  StringRef ShowOverloads =
554    Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
555  if (ShowOverloads == "best")
556    Opts.setShowOverloads(Ovl_Best);
557  else if (ShowOverloads == "all")
558    Opts.setShowOverloads(Ovl_All);
559  else {
560    Success = false;
561    if (Diags)
562      Diags->Report(diag::err_drv_invalid_value)
563      << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
564      << ShowOverloads;
565  }
566
567  StringRef ShowCategory =
568    Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
569  if (ShowCategory == "none")
570    Opts.ShowCategories = 0;
571  else if (ShowCategory == "id")
572    Opts.ShowCategories = 1;
573  else if (ShowCategory == "name")
574    Opts.ShowCategories = 2;
575  else {
576    Success = false;
577    if (Diags)
578      Diags->Report(diag::err_drv_invalid_value)
579      << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
580      << ShowCategory;
581  }
582
583  StringRef Format =
584    Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
585  if (Format == "clang")
586    Opts.setFormat(DiagnosticOptions::Clang);
587  else if (Format == "msvc")
588    Opts.setFormat(DiagnosticOptions::Msvc);
589  else if (Format == "vi")
590    Opts.setFormat(DiagnosticOptions::Vi);
591  else {
592    Success = false;
593    if (Diags)
594      Diags->Report(diag::err_drv_invalid_value)
595      << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
596      << Format;
597  }
598
599  Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
600  Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
601  Opts.ShowPresumedLoc = !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
602  Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
603  Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
604  Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
605  Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
606  Opts.MacroBacktraceLimit =
607      getLastArgIntValue(Args, OPT_fmacro_backtrace_limit,
608                         DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
609  Opts.TemplateBacktraceLimit = getLastArgIntValue(
610      Args, OPT_ftemplate_backtrace_limit,
611      DiagnosticOptions::DefaultTemplateBacktraceLimit, Diags);
612  Opts.ConstexprBacktraceLimit = getLastArgIntValue(
613      Args, OPT_fconstexpr_backtrace_limit,
614      DiagnosticOptions::DefaultConstexprBacktraceLimit, Diags);
615  Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
616                                    DiagnosticOptions::DefaultTabStop, Diags);
617  if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
618    Opts.TabStop = DiagnosticOptions::DefaultTabStop;
619    if (Diags)
620      Diags->Report(diag::warn_ignoring_ftabstop_value)
621      << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
622  }
623  Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
624  addWarningArgs(Args, Opts.Warnings);
625
626  return Success;
627}
628
629static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
630  Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
631}
632
633static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
634                                   DiagnosticsEngine &Diags) {
635  using namespace options;
636  Opts.ProgramAction = frontend::ParseSyntaxOnly;
637  if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
638    switch (A->getOption().getID()) {
639    default:
640      llvm_unreachable("Invalid option in group!");
641    case OPT_ast_list:
642      Opts.ProgramAction = frontend::ASTDeclList; break;
643    case OPT_ast_dump:
644      Opts.ProgramAction = frontend::ASTDump; break;
645    case OPT_ast_dump_xml:
646      Opts.ProgramAction = frontend::ASTDumpXML; break;
647    case OPT_ast_print:
648      Opts.ProgramAction = frontend::ASTPrint; break;
649    case OPT_ast_view:
650      Opts.ProgramAction = frontend::ASTView; break;
651    case OPT_dump_raw_tokens:
652      Opts.ProgramAction = frontend::DumpRawTokens; break;
653    case OPT_dump_tokens:
654      Opts.ProgramAction = frontend::DumpTokens; break;
655    case OPT_S:
656      Opts.ProgramAction = frontend::EmitAssembly; break;
657    case OPT_emit_llvm_bc:
658      Opts.ProgramAction = frontend::EmitBC; break;
659    case OPT_emit_html:
660      Opts.ProgramAction = frontend::EmitHTML; break;
661    case OPT_emit_llvm:
662      Opts.ProgramAction = frontend::EmitLLVM; break;
663    case OPT_emit_llvm_only:
664      Opts.ProgramAction = frontend::EmitLLVMOnly; break;
665    case OPT_emit_codegen_only:
666      Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
667    case OPT_emit_obj:
668      Opts.ProgramAction = frontend::EmitObj; break;
669    case OPT_fixit_EQ:
670      Opts.FixItSuffix = A->getValue();
671      // fall-through!
672    case OPT_fixit:
673      Opts.ProgramAction = frontend::FixIt; break;
674    case OPT_emit_module:
675      Opts.ProgramAction = frontend::GenerateModule; break;
676    case OPT_emit_pch:
677      Opts.ProgramAction = frontend::GeneratePCH; break;
678    case OPT_emit_pth:
679      Opts.ProgramAction = frontend::GeneratePTH; break;
680    case OPT_init_only:
681      Opts.ProgramAction = frontend::InitOnly; break;
682    case OPT_fsyntax_only:
683      Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
684    case OPT_module_file_info:
685      Opts.ProgramAction = frontend::ModuleFileInfo; break;
686    case OPT_print_decl_contexts:
687      Opts.ProgramAction = frontend::PrintDeclContext; break;
688    case OPT_print_preamble:
689      Opts.ProgramAction = frontend::PrintPreamble; break;
690    case OPT_E:
691      Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
692    case OPT_rewrite_macros:
693      Opts.ProgramAction = frontend::RewriteMacros; break;
694    case OPT_rewrite_objc:
695      Opts.ProgramAction = frontend::RewriteObjC; break;
696    case OPT_rewrite_test:
697      Opts.ProgramAction = frontend::RewriteTest; break;
698    case OPT_analyze:
699      Opts.ProgramAction = frontend::RunAnalysis; break;
700    case OPT_migrate:
701      Opts.ProgramAction = frontend::MigrateSource; break;
702    case OPT_Eonly:
703      Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
704    }
705  }
706
707  if (const Arg* A = Args.getLastArg(OPT_plugin)) {
708    Opts.Plugins.push_back(A->getValue(0));
709    Opts.ProgramAction = frontend::PluginAction;
710    Opts.ActionName = A->getValue();
711
712    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
713           end = Args.filtered_end(); it != end; ++it) {
714      if ((*it)->getValue(0) == Opts.ActionName)
715        Opts.PluginArgs.push_back((*it)->getValue(1));
716    }
717  }
718
719  Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
720  Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
721  for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
722    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
723           end = Args.filtered_end(); it != end; ++it) {
724      if ((*it)->getValue(0) == Opts.AddPluginActions[i])
725        Opts.AddPluginArgs[i].push_back((*it)->getValue(1));
726    }
727  }
728
729  if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
730    Opts.CodeCompletionAt =
731      ParsedSourceLocation::FromString(A->getValue());
732    if (Opts.CodeCompletionAt.FileName.empty())
733      Diags.Report(diag::err_drv_invalid_value)
734        << A->getAsString(Args) << A->getValue();
735  }
736  Opts.DisableFree = Args.hasArg(OPT_disable_free);
737
738  Opts.OutputFile = Args.getLastArgValue(OPT_o);
739  Opts.Plugins = Args.getAllArgValues(OPT_load);
740  Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
741  Opts.ShowHelp = Args.hasArg(OPT_help);
742  Opts.ShowStats = Args.hasArg(OPT_print_stats);
743  Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
744  Opts.ShowVersion = Args.hasArg(OPT_version);
745  Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
746  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
747  Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
748  Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
749  Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
750  Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
751  Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
752  Opts.ASTDumpLookups = Args.hasArg(OPT_ast_dump_lookups);
753  Opts.UseGlobalModuleIndex = !Args.hasArg(OPT_fno_modules_global_index);
754  Opts.GenerateGlobalModuleIndex = Opts.UseGlobalModuleIndex;
755
756  Opts.CodeCompleteOpts.IncludeMacros
757    = Args.hasArg(OPT_code_completion_macros);
758  Opts.CodeCompleteOpts.IncludeCodePatterns
759    = Args.hasArg(OPT_code_completion_patterns);
760  Opts.CodeCompleteOpts.IncludeGlobals
761    = !Args.hasArg(OPT_no_code_completion_globals);
762  Opts.CodeCompleteOpts.IncludeBriefComments
763    = Args.hasArg(OPT_code_completion_brief_comments);
764
765  Opts.OverrideRecordLayoutsFile
766    = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
767  if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
768                                     OPT_arcmt_modify,
769                                     OPT_arcmt_migrate)) {
770    switch (A->getOption().getID()) {
771    default:
772      llvm_unreachable("missed a case");
773    case OPT_arcmt_check:
774      Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
775      break;
776    case OPT_arcmt_modify:
777      Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
778      break;
779    case OPT_arcmt_migrate:
780      Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
781      break;
782    }
783  }
784  Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
785  Opts.ARCMTMigrateReportOut
786    = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
787  Opts.ARCMTMigrateEmitARCErrors
788    = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
789
790  if (Args.hasArg(OPT_objcmt_migrate_literals))
791    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
792  if (Args.hasArg(OPT_objcmt_migrate_subscripting))
793    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
794  if (Args.hasArg(OPT_objcmt_migrate_property))
795    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Property;
796  if (Args.hasArg(OPT_objcmt_migrate_readonly_property))
797    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadonlyProperty;
798
799  if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
800      Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
801    Diags.Report(diag::err_drv_argument_not_allowed_with)
802      << "ARC migration" << "ObjC migration";
803  }
804
805  InputKind DashX = IK_None;
806  if (const Arg *A = Args.getLastArg(OPT_x)) {
807    DashX = llvm::StringSwitch<InputKind>(A->getValue())
808      .Case("c", IK_C)
809      .Case("cl", IK_OpenCL)
810      .Case("cuda", IK_CUDA)
811      .Case("c++", IK_CXX)
812      .Case("objective-c", IK_ObjC)
813      .Case("objective-c++", IK_ObjCXX)
814      .Case("cpp-output", IK_PreprocessedC)
815      .Case("assembler-with-cpp", IK_Asm)
816      .Case("c++-cpp-output", IK_PreprocessedCXX)
817      .Case("objective-c-cpp-output", IK_PreprocessedObjC)
818      .Case("objc-cpp-output", IK_PreprocessedObjC)
819      .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
820      .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
821      .Case("c-header", IK_C)
822      .Case("cl-header", IK_OpenCL)
823      .Case("objective-c-header", IK_ObjC)
824      .Case("c++-header", IK_CXX)
825      .Case("objective-c++-header", IK_ObjCXX)
826      .Cases("ast", "pcm", IK_AST)
827      .Case("ir", IK_LLVM_IR)
828      .Default(IK_None);
829    if (DashX == IK_None)
830      Diags.Report(diag::err_drv_invalid_value)
831        << A->getAsString(Args) << A->getValue();
832  }
833
834  // '-' is the default input if none is given.
835  std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
836  Opts.Inputs.clear();
837  if (Inputs.empty())
838    Inputs.push_back("-");
839  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
840    InputKind IK = DashX;
841    if (IK == IK_None) {
842      IK = FrontendOptions::getInputKindForExtension(
843        StringRef(Inputs[i]).rsplit('.').second);
844      // FIXME: Remove this hack.
845      if (i == 0)
846        DashX = IK;
847    }
848    Opts.Inputs.push_back(FrontendInputFile(Inputs[i], IK));
849  }
850
851  return DashX;
852}
853
854std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
855                                                 void *MainAddr) {
856  SmallString<128> P(llvm::sys::fs::getMainExecutable(Argv0, MainAddr));
857
858  if (!P.empty()) {
859    llvm::sys::path::remove_filename(P); // Remove /clang from foo/bin/clang
860    llvm::sys::path::remove_filename(P); // Remove /bin   from foo/bin
861
862    // Get foo/lib/clang/<version>/include
863    llvm::sys::path::append(P, "lib", "clang", CLANG_VERSION_STRING);
864  }
865
866  return P.str();
867}
868
869static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
870  using namespace options;
871  Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
872  Opts.Verbose = Args.hasArg(OPT_v);
873  Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
874  Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
875  Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
876  if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
877    Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
878  Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
879  Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodules_cache_path);
880  Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
881  // -fmodules implies -fmodule-maps
882  Opts.ModuleMaps = Args.hasArg(OPT_fmodule_maps) || Args.hasArg(OPT_fmodules);
883  Opts.ModuleCachePruneInterval =
884      getLastArgIntValue(Args, OPT_fmodules_prune_interval, 7 * 24 * 60 * 60);
885  Opts.ModuleCachePruneAfter =
886      getLastArgIntValue(Args, OPT_fmodules_prune_after, 31 * 24 * 60 * 60);
887  for (arg_iterator it = Args.filtered_begin(OPT_fmodules_ignore_macro),
888                    ie = Args.filtered_end();
889       it != ie; ++it) {
890    StringRef MacroDef = (*it)->getValue();
891    Opts.ModulesIgnoreMacros.insert(MacroDef.split('=').first);
892  }
893
894  // Add -I..., -F..., and -index-header-map options in order.
895  bool IsIndexHeaderMap = false;
896  for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F,
897                                             OPT_index_header_map),
898       ie = Args.filtered_end(); it != ie; ++it) {
899    if ((*it)->getOption().matches(OPT_index_header_map)) {
900      // -index-header-map applies to the next -I or -F.
901      IsIndexHeaderMap = true;
902      continue;
903    }
904
905    frontend::IncludeDirGroup Group
906      = IsIndexHeaderMap? frontend::IndexHeaderMap : frontend::Angled;
907
908    Opts.AddPath((*it)->getValue(), Group,
909                 /*IsFramework=*/ (*it)->getOption().matches(OPT_F), true);
910    IsIndexHeaderMap = false;
911  }
912
913  // Add -iprefix/-iwithprefix/-iwithprefixbefore options.
914  StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
915  for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
916                                             OPT_iwithprefixbefore),
917         ie = Args.filtered_end(); it != ie; ++it) {
918    const Arg *A = *it;
919    if (A->getOption().matches(OPT_iprefix))
920      Prefix = A->getValue();
921    else if (A->getOption().matches(OPT_iwithprefix))
922      Opts.AddPath(Prefix.str() + A->getValue(),
923                   frontend::After, false, true);
924    else
925      Opts.AddPath(Prefix.str() + A->getValue(),
926                   frontend::Angled, false, true);
927  }
928
929  for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
930         ie = Args.filtered_end(); it != ie; ++it)
931    Opts.AddPath((*it)->getValue(), frontend::After, false, true);
932  for (arg_iterator it = Args.filtered_begin(OPT_iquote),
933         ie = Args.filtered_end(); it != ie; ++it)
934    Opts.AddPath((*it)->getValue(), frontend::Quoted, false, true);
935  for (arg_iterator it = Args.filtered_begin(OPT_isystem,
936         OPT_iwithsysroot), ie = Args.filtered_end(); it != ie; ++it)
937    Opts.AddPath((*it)->getValue(), frontend::System, false,
938                 !(*it)->getOption().matches(OPT_iwithsysroot));
939  for (arg_iterator it = Args.filtered_begin(OPT_iframework),
940         ie = Args.filtered_end(); it != ie; ++it)
941    Opts.AddPath((*it)->getValue(), frontend::System, true, true);
942
943  // Add the paths for the various language specific isystem flags.
944  for (arg_iterator it = Args.filtered_begin(OPT_c_isystem),
945       ie = Args.filtered_end(); it != ie; ++it)
946    Opts.AddPath((*it)->getValue(), frontend::CSystem, false, true);
947  for (arg_iterator it = Args.filtered_begin(OPT_cxx_isystem),
948       ie = Args.filtered_end(); it != ie; ++it)
949    Opts.AddPath((*it)->getValue(), frontend::CXXSystem, false, true);
950  for (arg_iterator it = Args.filtered_begin(OPT_objc_isystem),
951       ie = Args.filtered_end(); it != ie; ++it)
952    Opts.AddPath((*it)->getValue(), frontend::ObjCSystem, false,true);
953  for (arg_iterator it = Args.filtered_begin(OPT_objcxx_isystem),
954       ie = Args.filtered_end(); it != ie; ++it)
955    Opts.AddPath((*it)->getValue(), frontend::ObjCXXSystem, false, true);
956
957  // Add the internal paths from a driver that detects standard include paths.
958  for (arg_iterator I = Args.filtered_begin(OPT_internal_isystem,
959                                            OPT_internal_externc_isystem),
960                    E = Args.filtered_end();
961       I != E; ++I) {
962    frontend::IncludeDirGroup Group = frontend::System;
963    if ((*I)->getOption().matches(OPT_internal_externc_isystem))
964      Group = frontend::ExternCSystem;
965    Opts.AddPath((*I)->getValue(), Group, false, true);
966  }
967
968  // Add the path prefixes which are implicitly treated as being system headers.
969  for (arg_iterator I = Args.filtered_begin(OPT_isystem_prefix,
970                                            OPT_ino_system_prefix),
971                    E = Args.filtered_end();
972       I != E; ++I)
973    Opts.AddSystemHeaderPrefix((*I)->getValue(),
974                               (*I)->getOption().matches(OPT_isystem_prefix));
975}
976
977void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
978                                         LangStandard::Kind LangStd) {
979  // Set some properties which depend solely on the input kind; it would be nice
980  // to move these to the language standard, and have the driver resolve the
981  // input kind + language standard.
982  if (IK == IK_Asm) {
983    Opts.AsmPreprocessor = 1;
984  } else if (IK == IK_ObjC ||
985             IK == IK_ObjCXX ||
986             IK == IK_PreprocessedObjC ||
987             IK == IK_PreprocessedObjCXX) {
988    Opts.ObjC1 = Opts.ObjC2 = 1;
989  }
990
991  if (LangStd == LangStandard::lang_unspecified) {
992    // Based on the base language, pick one.
993    switch (IK) {
994    case IK_None:
995    case IK_AST:
996    case IK_LLVM_IR:
997      llvm_unreachable("Invalid input kind!");
998    case IK_OpenCL:
999      LangStd = LangStandard::lang_opencl;
1000      break;
1001    case IK_CUDA:
1002      LangStd = LangStandard::lang_cuda;
1003      break;
1004    case IK_Asm:
1005    case IK_C:
1006    case IK_PreprocessedC:
1007    case IK_ObjC:
1008    case IK_PreprocessedObjC:
1009      LangStd = LangStandard::lang_gnu99;
1010      break;
1011    case IK_CXX:
1012    case IK_PreprocessedCXX:
1013    case IK_ObjCXX:
1014    case IK_PreprocessedObjCXX:
1015      LangStd = LangStandard::lang_gnucxx98;
1016      break;
1017    }
1018  }
1019
1020  const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1021  Opts.LineComment = Std.hasLineComments();
1022  Opts.C99 = Std.isC99();
1023  Opts.C11 = Std.isC11();
1024  Opts.CPlusPlus = Std.isCPlusPlus();
1025  Opts.CPlusPlus11 = Std.isCPlusPlus11();
1026  Opts.CPlusPlus1y = Std.isCPlusPlus1y();
1027  Opts.Digraphs = Std.hasDigraphs();
1028  Opts.GNUMode = Std.isGNUMode();
1029  Opts.GNUInline = !Std.isC99();
1030  Opts.HexFloats = Std.hasHexFloats();
1031  Opts.ImplicitInt = Std.hasImplicitInt();
1032
1033  // Set OpenCL Version.
1034  if (LangStd == LangStandard::lang_opencl) {
1035    Opts.OpenCL = 1;
1036    Opts.OpenCLVersion = 100;
1037  }
1038  else if (LangStd == LangStandard::lang_opencl11) {
1039      Opts.OpenCL = 1;
1040      Opts.OpenCLVersion = 110;
1041  }
1042  else if (LangStd == LangStandard::lang_opencl12) {
1043    Opts.OpenCL = 1;
1044    Opts.OpenCLVersion = 120;
1045  }
1046
1047  // OpenCL has some additional defaults.
1048  if (Opts.OpenCL) {
1049    Opts.AltiVec = 0;
1050    Opts.CXXOperatorNames = 1;
1051    Opts.LaxVectorConversions = 0;
1052    Opts.DefaultFPContract = 1;
1053    Opts.NativeHalfType = 1;
1054  }
1055
1056  if (LangStd == LangStandard::lang_cuda)
1057    Opts.CUDA = 1;
1058
1059  // OpenCL and C++ both have bool, true, false keywords.
1060  Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1061
1062  // C++ has wchar_t keyword.
1063  Opts.WChar = Opts.CPlusPlus;
1064
1065  Opts.GNUKeywords = Opts.GNUMode;
1066  Opts.CXXOperatorNames = Opts.CPlusPlus;
1067
1068  // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1069  // is specified, or -std is set to a conforming mode.
1070  Opts.Trigraphs = !Opts.GNUMode;
1071
1072  Opts.DollarIdents = !Opts.AsmPreprocessor;
1073}
1074
1075/// Attempt to parse a visibility value out of the given argument.
1076static Visibility parseVisibility(Arg *arg, ArgList &args,
1077                                  DiagnosticsEngine &diags) {
1078  StringRef value = arg->getValue();
1079  if (value == "default") {
1080    return DefaultVisibility;
1081  } else if (value == "hidden") {
1082    return HiddenVisibility;
1083  } else if (value == "protected") {
1084    // FIXME: diagnose if target does not support protected visibility
1085    return ProtectedVisibility;
1086  }
1087
1088  diags.Report(diag::err_drv_invalid_value)
1089    << arg->getAsString(args) << value;
1090  return DefaultVisibility;
1091}
1092
1093static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1094                          DiagnosticsEngine &Diags) {
1095  // FIXME: Cleanup per-file based stuff.
1096  LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1097  if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1098    LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1099#define LANGSTANDARD(id, name, desc, features) \
1100      .Case(name, LangStandard::lang_##id)
1101#include "clang/Frontend/LangStandards.def"
1102      .Default(LangStandard::lang_unspecified);
1103    if (LangStd == LangStandard::lang_unspecified)
1104      Diags.Report(diag::err_drv_invalid_value)
1105        << A->getAsString(Args) << A->getValue();
1106    else {
1107      // Valid standard, check to make sure language and standard are compatable.
1108      const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1109      switch (IK) {
1110      case IK_C:
1111      case IK_ObjC:
1112      case IK_PreprocessedC:
1113      case IK_PreprocessedObjC:
1114        if (!(Std.isC89() || Std.isC99()))
1115          Diags.Report(diag::err_drv_argument_not_allowed_with)
1116            << A->getAsString(Args) << "C/ObjC";
1117        break;
1118      case IK_CXX:
1119      case IK_ObjCXX:
1120      case IK_PreprocessedCXX:
1121      case IK_PreprocessedObjCXX:
1122        if (!Std.isCPlusPlus())
1123          Diags.Report(diag::err_drv_argument_not_allowed_with)
1124            << A->getAsString(Args) << "C++/ObjC++";
1125        break;
1126      case IK_OpenCL:
1127        if (!Std.isC99())
1128          Diags.Report(diag::err_drv_argument_not_allowed_with)
1129            << A->getAsString(Args) << "OpenCL";
1130        break;
1131      case IK_CUDA:
1132        if (!Std.isCPlusPlus())
1133          Diags.Report(diag::err_drv_argument_not_allowed_with)
1134            << A->getAsString(Args) << "CUDA";
1135        break;
1136      default:
1137        break;
1138      }
1139    }
1140  }
1141
1142  // -cl-std only applies for OpenCL language standards.
1143  // Override the -std option in this case.
1144  if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1145    LangStandard::Kind OpenCLLangStd
1146    = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1147    .Case("CL", LangStandard::lang_opencl)
1148    .Case("CL1.1", LangStandard::lang_opencl11)
1149    .Case("CL1.2", LangStandard::lang_opencl12)
1150    .Default(LangStandard::lang_unspecified);
1151
1152    if (OpenCLLangStd == LangStandard::lang_unspecified) {
1153      Diags.Report(diag::err_drv_invalid_value)
1154      << A->getAsString(Args) << A->getValue();
1155    }
1156    else
1157      LangStd = OpenCLLangStd;
1158  }
1159
1160  CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1161
1162  // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1163  // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1164  // while a subset (the non-C++ GNU keywords) is provided by GCC's
1165  // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1166  // name, as it doesn't seem a useful distinction.
1167  Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1168                                  Opts.GNUKeywords);
1169
1170  if (Args.hasArg(OPT_fno_operator_names))
1171    Opts.CXXOperatorNames = 0;
1172
1173  if (Opts.ObjC1) {
1174    if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1175      StringRef value = arg->getValue();
1176      if (Opts.ObjCRuntime.tryParse(value))
1177        Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1178    }
1179
1180    if (Args.hasArg(OPT_fobjc_gc_only))
1181      Opts.setGC(LangOptions::GCOnly);
1182    else if (Args.hasArg(OPT_fobjc_gc))
1183      Opts.setGC(LangOptions::HybridGC);
1184    else if (Args.hasArg(OPT_fobjc_arc)) {
1185      Opts.ObjCAutoRefCount = 1;
1186      if (!Opts.ObjCRuntime.allowsARC())
1187        Diags.Report(diag::err_arc_unsupported_on_runtime);
1188
1189      // Only set ObjCARCWeak if ARC is enabled.
1190      if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1191        Opts.ObjCARCWeak = 1;
1192      else
1193        Opts.ObjCARCWeak = Opts.ObjCRuntime.allowsWeak();
1194    }
1195
1196    if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1197      Opts.ObjCInferRelatedResultType = 0;
1198  }
1199
1200  if (Args.hasArg(OPT_fgnu89_inline))
1201    Opts.GNUInline = 1;
1202
1203  if (Args.hasArg(OPT_fapple_kext)) {
1204    if (!Opts.CPlusPlus)
1205      Diags.Report(diag::warn_c_kext);
1206    else
1207      Opts.AppleKext = 1;
1208  }
1209
1210  if (Args.hasArg(OPT_print_ivar_layout))
1211    Opts.ObjCGCBitmapPrint = 1;
1212  if (Args.hasArg(OPT_fno_constant_cfstrings))
1213    Opts.NoConstantCFStrings = 1;
1214
1215  if (Args.hasArg(OPT_faltivec))
1216    Opts.AltiVec = 1;
1217
1218  if (Args.hasArg(OPT_pthread))
1219    Opts.POSIXThreads = 1;
1220
1221  // The value-visibility mode defaults to "default".
1222  if (Arg *visOpt = Args.getLastArg(OPT_fvisibility)) {
1223    Opts.setValueVisibilityMode(parseVisibility(visOpt, Args, Diags));
1224  } else {
1225    Opts.setValueVisibilityMode(DefaultVisibility);
1226  }
1227
1228  // The type-visibility mode defaults to the value-visibility mode.
1229  if (Arg *typeVisOpt = Args.getLastArg(OPT_ftype_visibility)) {
1230    Opts.setTypeVisibilityMode(parseVisibility(typeVisOpt, Args, Diags));
1231  } else {
1232    Opts.setTypeVisibilityMode(Opts.getValueVisibilityMode());
1233  }
1234
1235  if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1236    Opts.InlineVisibilityHidden = 1;
1237
1238  if (Args.hasArg(OPT_ftrapv)) {
1239    Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1240    // Set the handler, if one is specified.
1241    Opts.OverflowHandler =
1242        Args.getLastArgValue(OPT_ftrapv_handler);
1243  }
1244  else if (Args.hasArg(OPT_fwrapv))
1245    Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1246
1247  if (Args.hasArg(OPT_trigraphs))
1248    Opts.Trigraphs = 1;
1249
1250  Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1251                                   OPT_fno_dollars_in_identifiers,
1252                                   Opts.DollarIdents);
1253  Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1254  Opts.MicrosoftExt
1255    = Args.hasArg(OPT_fms_extensions) || Args.hasArg(OPT_fms_compatibility);
1256  Opts.MicrosoftMode = Args.hasArg(OPT_fms_compatibility);
1257  Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
1258  Opts.MSCVersion = getLastArgIntValue(Args, OPT_fmsc_version, 0, Diags);
1259  Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1260  Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1261  Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
1262                                   Opts.ConstStrings);
1263  if (Args.hasArg(OPT_fno_lax_vector_conversions))
1264    Opts.LaxVectorConversions = 0;
1265  if (Args.hasArg(OPT_fno_threadsafe_statics))
1266    Opts.ThreadsafeStatics = 0;
1267  Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1268  Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
1269  Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
1270  Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1271  Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
1272
1273  Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1274  Opts.Blocks = Args.hasArg(OPT_fblocks);
1275  Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
1276  Opts.Modules = Args.hasArg(OPT_fmodules);
1277  Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1278  Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
1279  Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1280  Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1281  Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1282  Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1283  Opts.NoMathBuiltin = Args.hasArg(OPT_fno_math_builtin);
1284  Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1285  Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1286  Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1287  Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1288  Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1289  Opts.InstantiationDepth =
1290      getLastArgIntValue(Args, OPT_ftemplate_depth, 256, Diags);
1291  Opts.ConstexprCallDepth =
1292      getLastArgIntValue(Args, OPT_fconstexpr_depth, 512, Diags);
1293  Opts.ConstexprStepLimit =
1294      getLastArgIntValue(Args, OPT_fconstexpr_steps, 1048576, Diags);
1295  Opts.BracketDepth = getLastArgIntValue(Args, OPT_fbracket_depth, 256, Diags);
1296  Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
1297  Opts.NumLargeByValueCopy =
1298      getLastArgIntValue(Args, OPT_Wlarge_by_value_copy_EQ, 0, Diags);
1299  Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
1300  Opts.ObjCConstantStringClass =
1301    Args.getLastArgValue(OPT_fconstant_string_class);
1302  Opts.ObjCDefaultSynthProperties =
1303    Args.hasArg(OPT_fobjc_default_synthesize_properties);
1304  Opts.EncodeExtendedBlockSig =
1305    Args.hasArg(OPT_fencode_extended_block_signature);
1306  Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1307  Opts.PackStruct = getLastArgIntValue(Args, OPT_fpack_struct_EQ, 0, Diags);
1308  Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
1309  Opts.PIELevel = getLastArgIntValue(Args, OPT_pie_level, 0, Diags);
1310  Opts.Static = Args.hasArg(OPT_static_define);
1311  Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
1312  Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
1313                        || Args.hasArg(OPT_fdump_record_layouts);
1314  Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1315  Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1316  Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1317  Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
1318  Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
1319  Opts.MRTD = Args.hasArg(OPT_mrtd);
1320  Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
1321  Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
1322  Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
1323  Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
1324  Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
1325  Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
1326  Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
1327  Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
1328
1329  // Check if -fopenmp is specified.
1330  Opts.OpenMP = Args.hasArg(OPT_fopenmp);
1331
1332  // Record whether the __DEPRECATED define was requested.
1333  Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
1334                                 OPT_fno_deprecated_macro,
1335                                 Opts.Deprecated);
1336
1337  // FIXME: Eliminate this dependency.
1338  unsigned Opt = getOptimizationLevel(Args, IK, Diags),
1339       OptSize = getOptimizationLevelSize(Args);
1340  Opts.Optimize = Opt != 0;
1341  Opts.OptimizeSize = OptSize != 0;
1342
1343  // This is the __NO_INLINE__ define, which just depends on things like the
1344  // optimization level and -fno-inline, not actually whether the backend has
1345  // inlining enabled.
1346  Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
1347
1348  Opts.FastMath = Args.hasArg(OPT_ffast_math);
1349  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only);
1350
1351  Opts.RetainCommentsFromSystemHeaders =
1352      Args.hasArg(OPT_fretain_comments_from_system_headers);
1353
1354  unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
1355  switch (SSP) {
1356  default:
1357    Diags.Report(diag::err_drv_invalid_value)
1358      << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1359    break;
1360  case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
1361  case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
1362  case 2: Opts.setStackProtector(LangOptions::SSPReq); break;
1363  }
1364
1365  // Parse -fsanitize= arguments.
1366  std::vector<std::string> Sanitizers = Args.getAllArgValues(OPT_fsanitize_EQ);
1367  for (unsigned I = 0, N = Sanitizers.size(); I != N; ++I) {
1368    // Since the Opts.Sanitize* values are bitfields, it's a little tricky to
1369    // efficiently map string values to them. Perform the mapping indirectly:
1370    // convert strings to enumerated values, then switch over the enum to set
1371    // the right bitfield value.
1372    enum Sanitizer {
1373#define SANITIZER(NAME, ID) \
1374      ID,
1375#include "clang/Basic/Sanitizers.def"
1376      Unknown
1377    };
1378    switch (llvm::StringSwitch<unsigned>(Sanitizers[I])
1379#define SANITIZER(NAME, ID) \
1380              .Case(NAME, ID)
1381#include "clang/Basic/Sanitizers.def"
1382              .Default(Unknown)) {
1383#define SANITIZER(NAME, ID) \
1384    case ID: \
1385      Opts.Sanitize.ID = true; \
1386      break;
1387#include "clang/Basic/Sanitizers.def"
1388
1389    case Unknown:
1390      Diags.Report(diag::err_drv_invalid_value)
1391        << "-fsanitize=" << Sanitizers[I];
1392      break;
1393    }
1394  }
1395}
1396
1397static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1398                                  FileManager &FileMgr,
1399                                  DiagnosticsEngine &Diags) {
1400  using namespace options;
1401  Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1402  Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1403  if (const Arg *A = Args.getLastArg(OPT_token_cache))
1404      Opts.TokenCache = A->getValue();
1405  else
1406    Opts.TokenCache = Opts.ImplicitPTHInclude;
1407  Opts.UsePredefines = !Args.hasArg(OPT_undef);
1408  Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1409  Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1410
1411  Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
1412  for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
1413         ie = Args.filtered_end(); it != ie; ++it) {
1414    const Arg *A = *it;
1415    Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
1416  }
1417
1418  if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1419    StringRef Value(A->getValue());
1420    size_t Comma = Value.find(',');
1421    unsigned Bytes = 0;
1422    unsigned EndOfLine = 0;
1423
1424    if (Comma == StringRef::npos ||
1425        Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1426        Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1427      Diags.Report(diag::err_drv_preamble_format);
1428    else {
1429      Opts.PrecompiledPreambleBytes.first = Bytes;
1430      Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1431    }
1432  }
1433
1434  // Add macros from the command line.
1435  for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1436         ie = Args.filtered_end(); it != ie; ++it) {
1437    if ((*it)->getOption().matches(OPT_D))
1438      Opts.addMacroDef((*it)->getValue());
1439    else
1440      Opts.addMacroUndef((*it)->getValue());
1441  }
1442
1443  Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1444
1445  // Add the ordered list of -includes.
1446  for (arg_iterator it = Args.filtered_begin(OPT_include),
1447         ie = Args.filtered_end(); it != ie; ++it) {
1448    const Arg *A = *it;
1449    Opts.Includes.push_back(A->getValue());
1450  }
1451
1452  for (arg_iterator it = Args.filtered_begin(OPT_chain_include),
1453         ie = Args.filtered_end(); it != ie; ++it) {
1454    const Arg *A = *it;
1455    Opts.ChainedIncludes.push_back(A->getValue());
1456  }
1457
1458  // Include 'altivec.h' if -faltivec option present
1459  if (Args.hasArg(OPT_faltivec))
1460    Opts.Includes.push_back("altivec.h");
1461
1462  for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1463         ie = Args.filtered_end(); it != ie; ++it) {
1464    const Arg *A = *it;
1465    std::pair<StringRef,StringRef> Split =
1466      StringRef(A->getValue()).split(';');
1467
1468    if (Split.second.empty()) {
1469      Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1470      continue;
1471    }
1472
1473    Opts.addRemappedFile(Split.first, Split.second);
1474  }
1475
1476  if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
1477    StringRef Name = A->getValue();
1478    unsigned Library = llvm::StringSwitch<unsigned>(Name)
1479      .Case("libc++", ARCXX_libcxx)
1480      .Case("libstdc++", ARCXX_libstdcxx)
1481      .Case("none", ARCXX_nolib)
1482      .Default(~0U);
1483    if (Library == ~0U)
1484      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1485    else
1486      Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
1487  }
1488}
1489
1490static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1491                                        ArgList &Args,
1492                                        frontend::ActionKind Action) {
1493  using namespace options;
1494
1495  switch (Action) {
1496  case frontend::ASTDeclList:
1497  case frontend::ASTDump:
1498  case frontend::ASTDumpXML:
1499  case frontend::ASTPrint:
1500  case frontend::ASTView:
1501  case frontend::EmitAssembly:
1502  case frontend::EmitBC:
1503  case frontend::EmitHTML:
1504  case frontend::EmitLLVM:
1505  case frontend::EmitLLVMOnly:
1506  case frontend::EmitCodeGenOnly:
1507  case frontend::EmitObj:
1508  case frontend::FixIt:
1509  case frontend::GenerateModule:
1510  case frontend::GeneratePCH:
1511  case frontend::GeneratePTH:
1512  case frontend::ParseSyntaxOnly:
1513  case frontend::ModuleFileInfo:
1514  case frontend::PluginAction:
1515  case frontend::PrintDeclContext:
1516  case frontend::RewriteObjC:
1517  case frontend::RewriteTest:
1518  case frontend::RunAnalysis:
1519  case frontend::MigrateSource:
1520    Opts.ShowCPP = 0;
1521    break;
1522
1523  case frontend::DumpRawTokens:
1524  case frontend::DumpTokens:
1525  case frontend::InitOnly:
1526  case frontend::PrintPreamble:
1527  case frontend::PrintPreprocessedInput:
1528  case frontend::RewriteMacros:
1529  case frontend::RunPreprocessorOnly:
1530    Opts.ShowCPP = !Args.hasArg(OPT_dM);
1531    break;
1532  }
1533
1534  Opts.ShowComments = Args.hasArg(OPT_C);
1535  Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1536  Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1537  Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1538  Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
1539}
1540
1541static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1542  using namespace options;
1543  Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1544  Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
1545  Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1546  Opts.FPMath = Args.getLastArgValue(OPT_mfpmath);
1547  Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
1548  Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1549  Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1550
1551  // Use the default target triple if unspecified.
1552  if (Opts.Triple.empty())
1553    Opts.Triple = llvm::sys::getDefaultTargetTriple();
1554}
1555
1556//
1557
1558bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1559                                        const char *const *ArgBegin,
1560                                        const char *const *ArgEnd,
1561                                        DiagnosticsEngine &Diags) {
1562  bool Success = true;
1563
1564  // Parse the arguments.
1565  OwningPtr<OptTable> Opts(createDriverOptTable());
1566  const unsigned IncludedFlagsBitmask = options::CC1Option;
1567  unsigned MissingArgIndex, MissingArgCount;
1568  OwningPtr<InputArgList> Args(
1569    Opts->ParseArgs(ArgBegin, ArgEnd, MissingArgIndex, MissingArgCount,
1570                    IncludedFlagsBitmask));
1571
1572  // Check for missing argument error.
1573  if (MissingArgCount) {
1574    Diags.Report(diag::err_drv_missing_argument)
1575      << Args->getArgString(MissingArgIndex) << MissingArgCount;
1576    Success = false;
1577  }
1578
1579  // Issue errors on unknown arguments.
1580  for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1581         ie = Args->filtered_end(); it != ie; ++it) {
1582    Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
1583    Success = false;
1584  }
1585
1586  Success = ParseAnalyzerArgs(*Res.getAnalyzerOpts(), *Args, Diags) && Success;
1587  Success = ParseMigratorArgs(Res.getMigratorOpts(), *Args) && Success;
1588  ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1589  Success = ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, &Diags)
1590            && Success;
1591  ParseCommentArgs(Res.getLangOpts()->CommentOpts, *Args);
1592  ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
1593  // FIXME: We shouldn't have to pass the DashX option around here
1594  InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1595  Success = ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags)
1596            && Success;
1597  ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1598  if (DashX != IK_AST && DashX != IK_LLVM_IR) {
1599    ParseLangArgs(*Res.getLangOpts(), *Args, DashX, Diags);
1600    if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
1601      Res.getLangOpts()->ObjCExceptions = 1;
1602  }
1603  // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
1604  // PCH file and find the original header name. Remove the need to do that in
1605  // ParsePreprocessorArgs and remove the FileManager
1606  // parameters from the function and the "FileManager.h" #include.
1607  FileManager FileMgr(Res.getFileSystemOpts());
1608  ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
1609  ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args,
1610                              Res.getFrontendOpts().ProgramAction);
1611  ParseTargetArgs(Res.getTargetOpts(), *Args);
1612
1613  return Success;
1614}
1615
1616namespace {
1617
1618  class ModuleSignature {
1619    SmallVector<uint64_t, 16> Data;
1620    unsigned CurBit;
1621    uint64_t CurValue;
1622
1623  public:
1624    ModuleSignature() : CurBit(0), CurValue(0) { }
1625
1626    void add(uint64_t Value, unsigned Bits);
1627    void add(StringRef Value);
1628    void flush();
1629
1630    llvm::APInt getAsInteger() const;
1631  };
1632}
1633
1634void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
1635  CurValue |= Value << CurBit;
1636  if (CurBit + NumBits < 64) {
1637    CurBit += NumBits;
1638    return;
1639  }
1640
1641  // Add the current word.
1642  Data.push_back(CurValue);
1643
1644  if (CurBit)
1645    CurValue = Value >> (64-CurBit);
1646  else
1647    CurValue = 0;
1648  CurBit = (CurBit+NumBits) & 63;
1649}
1650
1651void ModuleSignature::flush() {
1652  if (CurBit == 0)
1653    return;
1654
1655  Data.push_back(CurValue);
1656  CurBit = 0;
1657  CurValue = 0;
1658}
1659
1660void ModuleSignature::add(StringRef Value) {
1661  for (StringRef::iterator I = Value.begin(), IEnd = Value.end(); I != IEnd;++I)
1662    add(*I, 8);
1663}
1664
1665llvm::APInt ModuleSignature::getAsInteger() const {
1666  return llvm::APInt(Data.size() * 64, Data);
1667}
1668
1669std::string CompilerInvocation::getModuleHash() const {
1670  // Note: For QoI reasons, the things we use as a hash here should all be
1671  // dumped via the -module-info flag.
1672  using llvm::hash_code;
1673  using llvm::hash_value;
1674  using llvm::hash_combine;
1675
1676  // Start the signature with the compiler version.
1677  // FIXME: We'd rather use something more cryptographically sound than
1678  // CityHash, but this will do for now.
1679  hash_code code = hash_value(getClangFullRepositoryVersion());
1680
1681  // Extend the signature with the language options
1682#define LANGOPT(Name, Bits, Default, Description) \
1683   code = hash_combine(code, LangOpts->Name);
1684#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
1685  code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
1686#define BENIGN_LANGOPT(Name, Bits, Default, Description)
1687#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
1688#include "clang/Basic/LangOptions.def"
1689
1690  // Extend the signature with the target options.
1691  code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
1692                      TargetOpts->ABI, TargetOpts->CXXABI,
1693                      TargetOpts->LinkerVersion);
1694  for (unsigned i = 0, n = TargetOpts->FeaturesAsWritten.size(); i != n; ++i)
1695    code = hash_combine(code, TargetOpts->FeaturesAsWritten[i]);
1696
1697  // Extend the signature with preprocessor options.
1698  const PreprocessorOptions &ppOpts = getPreprocessorOpts();
1699  const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
1700  code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
1701
1702  std::vector<StringRef> MacroDefs;
1703  for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
1704            I = getPreprocessorOpts().Macros.begin(),
1705         IEnd = getPreprocessorOpts().Macros.end();
1706       I != IEnd; ++I) {
1707    // If we're supposed to ignore this macro for the purposes of modules,
1708    // don't put it into the hash.
1709    if (!hsOpts.ModulesIgnoreMacros.empty()) {
1710      // Check whether we're ignoring this macro.
1711      StringRef MacroDef = I->first;
1712      if (hsOpts.ModulesIgnoreMacros.count(MacroDef.split('=').first))
1713        continue;
1714    }
1715
1716    code = hash_combine(code, I->first, I->second);
1717  }
1718
1719  // Extend the signature with the sysroot.
1720  code = hash_combine(code, hsOpts.Sysroot, hsOpts.UseBuiltinIncludes,
1721                      hsOpts.UseStandardSystemIncludes,
1722                      hsOpts.UseStandardCXXIncludes,
1723                      hsOpts.UseLibcxx);
1724
1725  // Darwin-specific hack: if we have a sysroot, use the contents and
1726  // modification time of
1727  //   $sysroot/System/Library/CoreServices/SystemVersion.plist
1728  // as part of the module hash.
1729  if (!hsOpts.Sysroot.empty()) {
1730    llvm::OwningPtr<llvm::MemoryBuffer> buffer;
1731    SmallString<128> systemVersionFile;
1732    systemVersionFile += hsOpts.Sysroot;
1733    llvm::sys::path::append(systemVersionFile, "System");
1734    llvm::sys::path::append(systemVersionFile, "Library");
1735    llvm::sys::path::append(systemVersionFile, "CoreServices");
1736    llvm::sys::path::append(systemVersionFile, "SystemVersion.plist");
1737    if (!llvm::MemoryBuffer::getFile(systemVersionFile, buffer)) {
1738      code = hash_combine(code, buffer.get()->getBuffer());
1739
1740      struct stat statBuf;
1741      if (stat(systemVersionFile.c_str(), &statBuf) == 0)
1742        code = hash_combine(code, statBuf.st_mtime);
1743    }
1744  }
1745
1746  return llvm::APInt(64, code).toString(36, /*Signed=*/false);
1747}
1748
1749namespace clang {
1750
1751// Declared in clang/Frontend/Utils.h.
1752int getLastArgIntValue(const ArgList &Args, OptSpecifier Id, int Default,
1753                       DiagnosticsEngine *Diags) {
1754  int Res = Default;
1755  if (Arg *A = Args.getLastArg(Id)) {
1756    if (StringRef(A->getValue()).getAsInteger(10, Res)) {
1757      if (Diags)
1758        Diags->Report(diag::err_drv_invalid_int_value) << A->getAsString(Args)
1759                                                       << A->getValue();
1760    }
1761  }
1762  return Res;
1763}
1764}
1765