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                             const TargetOptions &TargetOpts) {
300  using namespace options;
301  bool Success = true;
302
303  Opts.OptimizationLevel = getOptimizationLevel(Args, IK, Diags);
304  // TODO: This could be done in Driver
305  unsigned MaxOptLevel = 3;
306  if (Opts.OptimizationLevel > MaxOptLevel) {
307    // If the optimization level is not supported, fall back on the default optimization
308    Diags.Report(diag::warn_drv_optimization_value)
309        << Args.getLastArg(OPT_O)->getAsString(Args) << "-O" << MaxOptLevel;
310    Opts.OptimizationLevel = MaxOptLevel;
311  }
312
313  // We must always run at least the always inlining pass.
314  Opts.setInlining(
315    (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
316                                 : CodeGenOptions::OnlyAlwaysInlining);
317  // -fno-inline-functions overrides OptimizationLevel > 1.
318  Opts.NoInline = Args.hasArg(OPT_fno_inline);
319  Opts.setInlining(Args.hasArg(OPT_fno_inline_functions) ?
320                     CodeGenOptions::OnlyAlwaysInlining : Opts.getInlining());
321
322  if (Args.hasArg(OPT_gline_tables_only)) {
323    Opts.setDebugInfo(CodeGenOptions::DebugLineTablesOnly);
324  } else if (Args.hasArg(OPT_g_Flag) || Args.hasArg(OPT_gdwarf_2) ||
325             Args.hasArg(OPT_gdwarf_3) || Args.hasArg(OPT_gdwarf_4)) {
326    bool Default = false;
327    // Until dtrace (via CTF) can deal with distributed debug info,
328    // Darwin defaults to standalone/full debug info.
329    if (llvm::Triple(TargetOpts.Triple).isOSDarwin())
330      Default = true;
331
332    if (Args.hasFlag(OPT_fstandalone_debug, OPT_fno_standalone_debug, Default))
333      Opts.setDebugInfo(CodeGenOptions::FullDebugInfo);
334    else
335      Opts.setDebugInfo(CodeGenOptions::LimitedDebugInfo);
336  }
337  Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
338  Opts.SplitDwarfFile = Args.getLastArgValue(OPT_split_dwarf_file);
339  if (Args.hasArg(OPT_gdwarf_2))
340    Opts.DwarfVersion = 2;
341  else if (Args.hasArg(OPT_gdwarf_3))
342    Opts.DwarfVersion = 3;
343  else if (Args.hasArg(OPT_gdwarf_4))
344    Opts.DwarfVersion = 4;
345  else if (Opts.getDebugInfo() != CodeGenOptions::NoDebugInfo)
346    // Default Dwarf version is 4 if we are generating debug information.
347    Opts.DwarfVersion = 4;
348
349  Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
350  Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
351  Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
352  Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
353    OPT_fuse_register_sized_bitfield_access);
354  Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
355  Opts.StructPathTBAA = !Args.hasArg(OPT_no_struct_path_tbaa);
356  Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
357  Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
358  Opts.NoCommon = Args.hasArg(OPT_fno_common);
359  Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
360  Opts.OptimizeSize = getOptimizationLevelSize(Args);
361  Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
362                            Args.hasArg(OPT_ffreestanding));
363  Opts.UnrollLoops =
364      Args.hasFlag(OPT_funroll_loops, OPT_fno_unroll_loops,
365                   (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize));
366  Opts.RerollLoops = Args.hasArg(OPT_freroll_loops);
367
368  Opts.Autolink = !Args.hasArg(OPT_fno_autolink);
369  Opts.SampleProfileFile = Args.getLastArgValue(OPT_fprofile_sample_use_EQ);
370  Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
371  Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
372  Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);
373  Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
374  Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
375  Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
376  Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
377  Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
378  Opts.DisableFree = Args.hasArg(OPT_disable_free);
379  Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
380  Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
381  Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
382  Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
383  Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
384  Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
385                       Args.hasArg(OPT_cl_finite_math_only)||
386                       Args.hasArg(OPT_cl_fast_relaxed_math));
387  Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
388                       Args.hasArg(OPT_cl_finite_math_only)||
389                       Args.hasArg(OPT_cl_fast_relaxed_math));
390  Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
391  Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
392  Opts.NumRegisterParameters = getLastArgIntValue(Args, OPT_mregparm, 0, Diags);
393  Opts.NoGlobalMerge = Args.hasArg(OPT_mno_global_merge);
394  Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
395  Opts.EnableSegmentedStacks = Args.hasArg(OPT_split_stacks);
396  Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
397  Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
398  Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
399  Opts.NoDwarf2CFIAsm = Args.hasArg(OPT_fno_dwarf2_cfi_asm);
400  Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
401  Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
402  Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
403  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
404                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
405                      Args.hasArg(OPT_cl_fast_relaxed_math);
406  Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
407  Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
408  Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
409  Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
410
411  Opts.FunctionSections = Args.hasFlag(OPT_ffunction_sections,
412                                       OPT_fno_function_sections, false);
413  Opts.DataSections = Args.hasFlag(OPT_fdata_sections,
414                                   OPT_fno_data_sections, false);
415
416  Opts.VectorizeBB = Args.hasArg(OPT_vectorize_slp_aggressive);
417  Opts.VectorizeLoop = Args.hasArg(OPT_vectorize_loops);
418  Opts.VectorizeSLP = Args.hasArg(OPT_vectorize_slp);
419
420  Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
421  Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
422  Opts.SanitizeRecover = !Args.hasArg(OPT_fno_sanitize_recover);
423
424  Opts.DisableGCov = Args.hasArg(OPT_test_coverage);
425  Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
426  Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
427  if (Opts.EmitGcovArcs || Opts.EmitGcovNotes) {
428  Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
429    Opts.CoverageExtraChecksum = Args.hasArg(OPT_coverage_cfg_checksum);
430    Opts.CoverageNoFunctionNamesInData =
431        Args.hasArg(OPT_coverage_no_function_names_in_data);
432    if (Args.hasArg(OPT_coverage_version_EQ)) {
433      StringRef CoverageVersion = Args.getLastArgValue(OPT_coverage_version_EQ);
434      if (CoverageVersion.size() != 4) {
435        Diags.Report(diag::err_drv_invalid_value)
436            << Args.getLastArg(OPT_coverage_version_EQ)->getAsString(Args)
437            << CoverageVersion;
438      } else {
439        memcpy(Opts.CoverageVersion, CoverageVersion.data(), 4);
440      }
441    }
442  }
443
444  Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
445  Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
446  Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
447  Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
448  Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
449  Opts.SanitizerBlacklistFile = Args.getLastArgValue(OPT_fsanitize_blacklist);
450  Opts.SanitizeMemoryTrackOrigins =
451    Args.hasArg(OPT_fsanitize_memory_track_origins);
452  Opts.SanitizeAddressZeroBaseShadow =
453    Args.hasArg(OPT_fsanitize_address_zero_base_shadow);
454  Opts.SanitizeUndefinedTrapOnError =
455    Args.hasArg(OPT_fsanitize_undefined_trap_on_error);
456  Opts.SSPBufferSize =
457      getLastArgIntValue(Args, OPT_stack_protector_buffer_size, 8, Diags);
458  Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
459  if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
460    StringRef Val = A->getValue();
461    unsigned StackAlignment = Opts.StackAlignment;
462    Val.getAsInteger(10, StackAlignment);
463    Opts.StackAlignment = StackAlignment;
464  }
465
466  if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
467    StringRef Name = A->getValue();
468    unsigned Method = llvm::StringSwitch<unsigned>(Name)
469      .Case("legacy", CodeGenOptions::Legacy)
470      .Case("non-legacy", CodeGenOptions::NonLegacy)
471      .Case("mixed", CodeGenOptions::Mixed)
472      .Default(~0U);
473    if (Method == ~0U) {
474      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
475      Success = false;
476    } else {
477      Opts.setObjCDispatchMethod(
478        static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
479    }
480  }
481
482  if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
483    StringRef Name = A->getValue();
484    unsigned Model = llvm::StringSwitch<unsigned>(Name)
485        .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
486        .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
487        .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
488        .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
489        .Default(~0U);
490    if (Model == ~0U) {
491      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
492      Success = false;
493    } else {
494      Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
495    }
496  }
497
498  if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
499    StringRef Val = A->getValue();
500    if (Val == "fast")
501      Opts.setFPContractMode(CodeGenOptions::FPC_Fast);
502    else if (Val == "on")
503      Opts.setFPContractMode(CodeGenOptions::FPC_On);
504    else if (Val == "off")
505      Opts.setFPContractMode(CodeGenOptions::FPC_Off);
506    else
507      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
508  }
509
510  if (Arg *A = Args.getLastArg(OPT_fpcc_struct_return, OPT_freg_struct_return)) {
511    if (A->getOption().matches(OPT_fpcc_struct_return)) {
512      Opts.setStructReturnConvention(CodeGenOptions::SRCK_OnStack);
513    } else {
514      assert(A->getOption().matches(OPT_freg_struct_return));
515      Opts.setStructReturnConvention(CodeGenOptions::SRCK_InRegs);
516    }
517  }
518
519  Opts.DependentLibraries = Args.getAllArgValues(OPT_dependent_lib);
520
521  return Success;
522}
523
524static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
525                                      ArgList &Args) {
526  using namespace options;
527  Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
528  Opts.Targets = Args.getAllArgValues(OPT_MT);
529  Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
530  Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
531  Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
532  Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
533  Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
534  Opts.PrintShowIncludes = Args.hasArg(OPT_show_includes);
535  Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
536}
537
538bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
539                                DiagnosticsEngine *Diags) {
540  using namespace options;
541  bool Success = true;
542
543  Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
544  Opts.DiagnosticSerializationFile =
545    Args.getLastArgValue(OPT_diagnostic_serialized_file);
546  Opts.IgnoreWarnings = Args.hasArg(OPT_w);
547  Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
548  Opts.Pedantic = Args.hasArg(OPT_pedantic);
549  Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
550  Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
551  Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
552  Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
553                                 OPT_fno_show_column,
554                                 /*Default=*/true);
555  Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
556  Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
557  Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
558
559  llvm::sys::Process::UseANSIEscapeCodes(Args.hasArg(OPT_fansi_escape_codes));
560
561  // Default behavior is to not to show note include stacks.
562  Opts.ShowNoteIncludeStack = false;
563  if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
564                               OPT_fno_diagnostics_show_note_include_stack))
565    if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
566      Opts.ShowNoteIncludeStack = true;
567
568  StringRef ShowOverloads =
569    Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
570  if (ShowOverloads == "best")
571    Opts.setShowOverloads(Ovl_Best);
572  else if (ShowOverloads == "all")
573    Opts.setShowOverloads(Ovl_All);
574  else {
575    Success = false;
576    if (Diags)
577      Diags->Report(diag::err_drv_invalid_value)
578      << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
579      << ShowOverloads;
580  }
581
582  StringRef ShowCategory =
583    Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
584  if (ShowCategory == "none")
585    Opts.ShowCategories = 0;
586  else if (ShowCategory == "id")
587    Opts.ShowCategories = 1;
588  else if (ShowCategory == "name")
589    Opts.ShowCategories = 2;
590  else {
591    Success = false;
592    if (Diags)
593      Diags->Report(diag::err_drv_invalid_value)
594      << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
595      << ShowCategory;
596  }
597
598  StringRef Format =
599    Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
600  if (Format == "clang")
601    Opts.setFormat(DiagnosticOptions::Clang);
602  else if (Format == "msvc")
603    Opts.setFormat(DiagnosticOptions::Msvc);
604  else if (Format == "msvc-fallback") {
605    Opts.setFormat(DiagnosticOptions::Msvc);
606    Opts.CLFallbackMode = true;
607  } else if (Format == "vi")
608    Opts.setFormat(DiagnosticOptions::Vi);
609  else {
610    Success = false;
611    if (Diags)
612      Diags->Report(diag::err_drv_invalid_value)
613      << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
614      << Format;
615  }
616
617  Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
618  Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
619  Opts.ShowPresumedLoc = !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
620  Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
621  Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
622  Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
623  Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
624  Opts.MacroBacktraceLimit =
625      getLastArgIntValue(Args, OPT_fmacro_backtrace_limit,
626                         DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
627  Opts.TemplateBacktraceLimit = getLastArgIntValue(
628      Args, OPT_ftemplate_backtrace_limit,
629      DiagnosticOptions::DefaultTemplateBacktraceLimit, Diags);
630  Opts.ConstexprBacktraceLimit = getLastArgIntValue(
631      Args, OPT_fconstexpr_backtrace_limit,
632      DiagnosticOptions::DefaultConstexprBacktraceLimit, Diags);
633  Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
634                                    DiagnosticOptions::DefaultTabStop, Diags);
635  if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
636    Opts.TabStop = DiagnosticOptions::DefaultTabStop;
637    if (Diags)
638      Diags->Report(diag::warn_ignoring_ftabstop_value)
639      << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
640  }
641  Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
642  addWarningArgs(Args, Opts.Warnings);
643
644  return Success;
645}
646
647static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
648  Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
649}
650
651static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
652                                   DiagnosticsEngine &Diags) {
653  using namespace options;
654  Opts.ProgramAction = frontend::ParseSyntaxOnly;
655  if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
656    switch (A->getOption().getID()) {
657    default:
658      llvm_unreachable("Invalid option in group!");
659    case OPT_ast_list:
660      Opts.ProgramAction = frontend::ASTDeclList; break;
661    case OPT_ast_dump:
662      Opts.ProgramAction = frontend::ASTDump; break;
663    case OPT_ast_print:
664      Opts.ProgramAction = frontend::ASTPrint; break;
665    case OPT_ast_view:
666      Opts.ProgramAction = frontend::ASTView; break;
667    case OPT_dump_raw_tokens:
668      Opts.ProgramAction = frontend::DumpRawTokens; break;
669    case OPT_dump_tokens:
670      Opts.ProgramAction = frontend::DumpTokens; break;
671    case OPT_S:
672      Opts.ProgramAction = frontend::EmitAssembly; break;
673    case OPT_emit_llvm_bc:
674      Opts.ProgramAction = frontend::EmitBC; break;
675    case OPT_emit_html:
676      Opts.ProgramAction = frontend::EmitHTML; break;
677    case OPT_emit_llvm:
678      Opts.ProgramAction = frontend::EmitLLVM; break;
679    case OPT_emit_llvm_only:
680      Opts.ProgramAction = frontend::EmitLLVMOnly; break;
681    case OPT_emit_codegen_only:
682      Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
683    case OPT_emit_obj:
684      Opts.ProgramAction = frontend::EmitObj; break;
685    case OPT_fixit_EQ:
686      Opts.FixItSuffix = A->getValue();
687      // fall-through!
688    case OPT_fixit:
689      Opts.ProgramAction = frontend::FixIt; break;
690    case OPT_emit_module:
691      Opts.ProgramAction = frontend::GenerateModule; break;
692    case OPT_emit_pch:
693      Opts.ProgramAction = frontend::GeneratePCH; break;
694    case OPT_emit_pth:
695      Opts.ProgramAction = frontend::GeneratePTH; break;
696    case OPT_init_only:
697      Opts.ProgramAction = frontend::InitOnly; break;
698    case OPT_fsyntax_only:
699      Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
700    case OPT_module_file_info:
701      Opts.ProgramAction = frontend::ModuleFileInfo; break;
702    case OPT_print_decl_contexts:
703      Opts.ProgramAction = frontend::PrintDeclContext; break;
704    case OPT_print_preamble:
705      Opts.ProgramAction = frontend::PrintPreamble; break;
706    case OPT_E:
707      Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
708    case OPT_rewrite_macros:
709      Opts.ProgramAction = frontend::RewriteMacros; break;
710    case OPT_rewrite_objc:
711      Opts.ProgramAction = frontend::RewriteObjC; break;
712    case OPT_rewrite_test:
713      Opts.ProgramAction = frontend::RewriteTest; break;
714    case OPT_analyze:
715      Opts.ProgramAction = frontend::RunAnalysis; break;
716    case OPT_migrate:
717      Opts.ProgramAction = frontend::MigrateSource; break;
718    case OPT_Eonly:
719      Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
720    }
721  }
722
723  if (const Arg* A = Args.getLastArg(OPT_plugin)) {
724    Opts.Plugins.push_back(A->getValue(0));
725    Opts.ProgramAction = frontend::PluginAction;
726    Opts.ActionName = A->getValue();
727
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.ActionName)
731        Opts.PluginArgs.push_back((*it)->getValue(1));
732    }
733  }
734
735  Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
736  Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
737  for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
738    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
739           end = Args.filtered_end(); it != end; ++it) {
740      if ((*it)->getValue(0) == Opts.AddPluginActions[i])
741        Opts.AddPluginArgs[i].push_back((*it)->getValue(1));
742    }
743  }
744
745  if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
746    Opts.CodeCompletionAt =
747      ParsedSourceLocation::FromString(A->getValue());
748    if (Opts.CodeCompletionAt.FileName.empty())
749      Diags.Report(diag::err_drv_invalid_value)
750        << A->getAsString(Args) << A->getValue();
751  }
752  Opts.DisableFree = Args.hasArg(OPT_disable_free);
753
754  Opts.OutputFile = Args.getLastArgValue(OPT_o);
755  Opts.Plugins = Args.getAllArgValues(OPT_load);
756  Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
757  Opts.ShowHelp = Args.hasArg(OPT_help);
758  Opts.ShowStats = Args.hasArg(OPT_print_stats);
759  Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
760  Opts.ShowVersion = Args.hasArg(OPT_version);
761  Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
762  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
763  Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
764  Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
765  Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
766  Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
767  Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
768  Opts.ASTDumpLookups = Args.hasArg(OPT_ast_dump_lookups);
769  Opts.UseGlobalModuleIndex = !Args.hasArg(OPT_fno_modules_global_index);
770  Opts.GenerateGlobalModuleIndex = Opts.UseGlobalModuleIndex;
771
772  Opts.CodeCompleteOpts.IncludeMacros
773    = Args.hasArg(OPT_code_completion_macros);
774  Opts.CodeCompleteOpts.IncludeCodePatterns
775    = Args.hasArg(OPT_code_completion_patterns);
776  Opts.CodeCompleteOpts.IncludeGlobals
777    = !Args.hasArg(OPT_no_code_completion_globals);
778  Opts.CodeCompleteOpts.IncludeBriefComments
779    = Args.hasArg(OPT_code_completion_brief_comments);
780
781  Opts.OverrideRecordLayoutsFile
782    = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
783  if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
784                                     OPT_arcmt_modify,
785                                     OPT_arcmt_migrate)) {
786    switch (A->getOption().getID()) {
787    default:
788      llvm_unreachable("missed a case");
789    case OPT_arcmt_check:
790      Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
791      break;
792    case OPT_arcmt_modify:
793      Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
794      break;
795    case OPT_arcmt_migrate:
796      Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
797      break;
798    }
799  }
800  Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
801  Opts.ARCMTMigrateReportOut
802    = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
803  Opts.ARCMTMigrateEmitARCErrors
804    = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
805
806  if (Args.hasArg(OPT_objcmt_migrate_literals))
807    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
808  if (Args.hasArg(OPT_objcmt_migrate_subscripting))
809    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
810  if (Args.hasArg(OPT_objcmt_migrate_property))
811    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Property;
812  if (Args.hasArg(OPT_objcmt_migrate_readonly_property))
813    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadonlyProperty;
814  if (Args.hasArg(OPT_objcmt_migrate_readwrite_property))
815    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadwriteProperty;
816  if (Args.hasArg(OPT_objcmt_migrate_annotation))
817    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Annotation;
818  if (Args.hasArg(OPT_objcmt_returns_innerpointer_property))
819    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReturnsInnerPointerProperty;
820  if (Args.hasArg(OPT_objcmt_migrate_instancetype))
821    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Instancetype;
822  if (Args.hasArg(OPT_objcmt_migrate_nsmacros))
823    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsMacros;
824  if (Args.hasArg(OPT_objcmt_migrate_protocol_conformance))
825    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ProtocolConformance;
826  if (Args.hasArg(OPT_objcmt_atomic_property))
827    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_AtomicProperty;
828  if (Args.hasArg(OPT_objcmt_ns_nonatomic_iosonly))
829    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsAtomicIOSOnlyProperty;
830  if (Args.hasArg(OPT_objcmt_migrate_all))
831    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_MigrateDecls;
832
833  Opts.ObjCMTWhiteListPath = Args.getLastArgValue(OPT_objcmt_white_list_dir_path);
834
835  if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
836      Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
837    Diags.Report(diag::err_drv_argument_not_allowed_with)
838      << "ARC migration" << "ObjC migration";
839  }
840
841  InputKind DashX = IK_None;
842  if (const Arg *A = Args.getLastArg(OPT_x)) {
843    DashX = llvm::StringSwitch<InputKind>(A->getValue())
844      .Case("c", IK_C)
845      .Case("cl", IK_OpenCL)
846      .Case("cuda", IK_CUDA)
847      .Case("c++", IK_CXX)
848      .Case("objective-c", IK_ObjC)
849      .Case("objective-c++", IK_ObjCXX)
850      .Case("cpp-output", IK_PreprocessedC)
851      .Case("assembler-with-cpp", IK_Asm)
852      .Case("c++-cpp-output", IK_PreprocessedCXX)
853      .Case("objective-c-cpp-output", IK_PreprocessedObjC)
854      .Case("objc-cpp-output", IK_PreprocessedObjC)
855      .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
856      .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
857      .Case("c-header", IK_C)
858      .Case("cl-header", IK_OpenCL)
859      .Case("objective-c-header", IK_ObjC)
860      .Case("c++-header", IK_CXX)
861      .Case("objective-c++-header", IK_ObjCXX)
862      .Cases("ast", "pcm", IK_AST)
863      .Case("ir", IK_LLVM_IR)
864      .Default(IK_None);
865    if (DashX == IK_None)
866      Diags.Report(diag::err_drv_invalid_value)
867        << A->getAsString(Args) << A->getValue();
868  }
869
870  // '-' is the default input if none is given.
871  std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
872  Opts.Inputs.clear();
873  if (Inputs.empty())
874    Inputs.push_back("-");
875  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
876    InputKind IK = DashX;
877    if (IK == IK_None) {
878      IK = FrontendOptions::getInputKindForExtension(
879        StringRef(Inputs[i]).rsplit('.').second);
880      // FIXME: Remove this hack.
881      if (i == 0)
882        DashX = IK;
883    }
884    Opts.Inputs.push_back(FrontendInputFile(Inputs[i], IK));
885  }
886
887  return DashX;
888}
889
890std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
891                                                 void *MainAddr) {
892  SmallString<128> P(llvm::sys::fs::getMainExecutable(Argv0, MainAddr));
893
894  if (!P.empty()) {
895    llvm::sys::path::remove_filename(P); // Remove /clang from foo/bin/clang
896    llvm::sys::path::remove_filename(P); // Remove /bin   from foo/bin
897
898    // Get foo/lib/clang/<version>/include
899    llvm::sys::path::append(P, "lib", "clang", CLANG_VERSION_STRING);
900  }
901
902  return P.str();
903}
904
905static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
906  using namespace options;
907  Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
908  Opts.Verbose = Args.hasArg(OPT_v);
909  Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
910  Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
911  Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
912  if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
913    Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
914  Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
915  Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodules_cache_path);
916  Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
917  // -fmodules implies -fmodule-maps
918  Opts.ModuleMaps = Args.hasArg(OPT_fmodule_maps) || Args.hasArg(OPT_fmodules);
919  Opts.ModuleCachePruneInterval =
920      getLastArgIntValue(Args, OPT_fmodules_prune_interval, 7 * 24 * 60 * 60);
921  Opts.ModuleCachePruneAfter =
922      getLastArgIntValue(Args, OPT_fmodules_prune_after, 31 * 24 * 60 * 60);
923  for (arg_iterator it = Args.filtered_begin(OPT_fmodules_ignore_macro),
924                    ie = Args.filtered_end();
925       it != ie; ++it) {
926    StringRef MacroDef = (*it)->getValue();
927    Opts.ModulesIgnoreMacros.insert(MacroDef.split('=').first);
928  }
929  std::vector<std::string> ModuleMapFiles =
930      Args.getAllArgValues(OPT_fmodule_map_file);
931  Opts.ModuleMapFiles.insert(ModuleMapFiles.begin(), ModuleMapFiles.end());
932
933  // Add -I..., -F..., and -index-header-map options in order.
934  bool IsIndexHeaderMap = false;
935  for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F,
936                                             OPT_index_header_map),
937       ie = Args.filtered_end(); it != ie; ++it) {
938    if ((*it)->getOption().matches(OPT_index_header_map)) {
939      // -index-header-map applies to the next -I or -F.
940      IsIndexHeaderMap = true;
941      continue;
942    }
943
944    frontend::IncludeDirGroup Group
945      = IsIndexHeaderMap? frontend::IndexHeaderMap : frontend::Angled;
946
947    Opts.AddPath((*it)->getValue(), Group,
948                 /*IsFramework=*/ (*it)->getOption().matches(OPT_F), true);
949    IsIndexHeaderMap = false;
950  }
951
952  // Add -iprefix/-iwithprefix/-iwithprefixbefore options.
953  StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
954  for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
955                                             OPT_iwithprefixbefore),
956         ie = Args.filtered_end(); it != ie; ++it) {
957    const Arg *A = *it;
958    if (A->getOption().matches(OPT_iprefix))
959      Prefix = A->getValue();
960    else if (A->getOption().matches(OPT_iwithprefix))
961      Opts.AddPath(Prefix.str() + A->getValue(),
962                   frontend::After, false, true);
963    else
964      Opts.AddPath(Prefix.str() + A->getValue(),
965                   frontend::Angled, false, true);
966  }
967
968  for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
969         ie = Args.filtered_end(); it != ie; ++it)
970    Opts.AddPath((*it)->getValue(), frontend::After, false, true);
971  for (arg_iterator it = Args.filtered_begin(OPT_iquote),
972         ie = Args.filtered_end(); it != ie; ++it)
973    Opts.AddPath((*it)->getValue(), frontend::Quoted, false, true);
974  for (arg_iterator it = Args.filtered_begin(OPT_isystem,
975         OPT_iwithsysroot), ie = Args.filtered_end(); it != ie; ++it)
976    Opts.AddPath((*it)->getValue(), frontend::System, false,
977                 !(*it)->getOption().matches(OPT_iwithsysroot));
978  for (arg_iterator it = Args.filtered_begin(OPT_iframework),
979         ie = Args.filtered_end(); it != ie; ++it)
980    Opts.AddPath((*it)->getValue(), frontend::System, true, true);
981
982  // Add the paths for the various language specific isystem flags.
983  for (arg_iterator it = Args.filtered_begin(OPT_c_isystem),
984       ie = Args.filtered_end(); it != ie; ++it)
985    Opts.AddPath((*it)->getValue(), frontend::CSystem, false, true);
986  for (arg_iterator it = Args.filtered_begin(OPT_cxx_isystem),
987       ie = Args.filtered_end(); it != ie; ++it)
988    Opts.AddPath((*it)->getValue(), frontend::CXXSystem, false, true);
989  for (arg_iterator it = Args.filtered_begin(OPT_objc_isystem),
990       ie = Args.filtered_end(); it != ie; ++it)
991    Opts.AddPath((*it)->getValue(), frontend::ObjCSystem, false,true);
992  for (arg_iterator it = Args.filtered_begin(OPT_objcxx_isystem),
993       ie = Args.filtered_end(); it != ie; ++it)
994    Opts.AddPath((*it)->getValue(), frontend::ObjCXXSystem, false, true);
995
996  // Add the internal paths from a driver that detects standard include paths.
997  for (arg_iterator I = Args.filtered_begin(OPT_internal_isystem,
998                                            OPT_internal_externc_isystem),
999                    E = Args.filtered_end();
1000       I != E; ++I) {
1001    frontend::IncludeDirGroup Group = frontend::System;
1002    if ((*I)->getOption().matches(OPT_internal_externc_isystem))
1003      Group = frontend::ExternCSystem;
1004    Opts.AddPath((*I)->getValue(), Group, false, true);
1005  }
1006
1007  // Add the path prefixes which are implicitly treated as being system headers.
1008  for (arg_iterator I = Args.filtered_begin(OPT_isystem_prefix,
1009                                            OPT_ino_system_prefix),
1010                    E = Args.filtered_end();
1011       I != E; ++I)
1012    Opts.AddSystemHeaderPrefix((*I)->getValue(),
1013                               (*I)->getOption().matches(OPT_isystem_prefix));
1014}
1015
1016void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
1017                                         LangStandard::Kind LangStd) {
1018  // Set some properties which depend solely on the input kind; it would be nice
1019  // to move these to the language standard, and have the driver resolve the
1020  // input kind + language standard.
1021  if (IK == IK_Asm) {
1022    Opts.AsmPreprocessor = 1;
1023  } else if (IK == IK_ObjC ||
1024             IK == IK_ObjCXX ||
1025             IK == IK_PreprocessedObjC ||
1026             IK == IK_PreprocessedObjCXX) {
1027    Opts.ObjC1 = Opts.ObjC2 = 1;
1028  }
1029
1030  if (LangStd == LangStandard::lang_unspecified) {
1031    // Based on the base language, pick one.
1032    switch (IK) {
1033    case IK_None:
1034    case IK_AST:
1035    case IK_LLVM_IR:
1036      llvm_unreachable("Invalid input kind!");
1037    case IK_OpenCL:
1038      LangStd = LangStandard::lang_opencl;
1039      break;
1040    case IK_CUDA:
1041      LangStd = LangStandard::lang_cuda;
1042      break;
1043    case IK_Asm:
1044    case IK_C:
1045    case IK_PreprocessedC:
1046    case IK_ObjC:
1047    case IK_PreprocessedObjC:
1048      LangStd = LangStandard::lang_gnu99;
1049      break;
1050    case IK_CXX:
1051    case IK_PreprocessedCXX:
1052    case IK_ObjCXX:
1053    case IK_PreprocessedObjCXX:
1054      LangStd = LangStandard::lang_gnucxx98;
1055      break;
1056    }
1057  }
1058
1059  const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1060  Opts.LineComment = Std.hasLineComments();
1061  Opts.C99 = Std.isC99();
1062  Opts.C11 = Std.isC11();
1063  Opts.CPlusPlus = Std.isCPlusPlus();
1064  Opts.CPlusPlus11 = Std.isCPlusPlus11();
1065  Opts.CPlusPlus1y = Std.isCPlusPlus1y();
1066  Opts.Digraphs = Std.hasDigraphs();
1067  Opts.GNUMode = Std.isGNUMode();
1068  Opts.GNUInline = !Std.isC99();
1069  Opts.HexFloats = Std.hasHexFloats();
1070  Opts.ImplicitInt = Std.hasImplicitInt();
1071
1072  // Set OpenCL Version.
1073  if (LangStd == LangStandard::lang_opencl) {
1074    Opts.OpenCL = 1;
1075    Opts.OpenCLVersion = 100;
1076  }
1077  else if (LangStd == LangStandard::lang_opencl11) {
1078      Opts.OpenCL = 1;
1079      Opts.OpenCLVersion = 110;
1080  }
1081  else if (LangStd == LangStandard::lang_opencl12) {
1082    Opts.OpenCL = 1;
1083    Opts.OpenCLVersion = 120;
1084  }
1085
1086  // OpenCL has some additional defaults.
1087  if (Opts.OpenCL) {
1088    Opts.AltiVec = 0;
1089    Opts.CXXOperatorNames = 1;
1090    Opts.LaxVectorConversions = 0;
1091    Opts.DefaultFPContract = 1;
1092    Opts.NativeHalfType = 1;
1093  }
1094
1095  if (LangStd == LangStandard::lang_cuda)
1096    Opts.CUDA = 1;
1097
1098  // OpenCL and C++ both have bool, true, false keywords.
1099  Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1100
1101  // C++ has wchar_t keyword.
1102  Opts.WChar = Opts.CPlusPlus;
1103
1104  Opts.GNUKeywords = Opts.GNUMode;
1105  Opts.CXXOperatorNames = Opts.CPlusPlus;
1106
1107  // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1108  // is specified, or -std is set to a conforming mode.
1109  Opts.Trigraphs = !Opts.GNUMode;
1110
1111  Opts.DollarIdents = !Opts.AsmPreprocessor;
1112
1113  // C++1y onwards has sized global deallocation functions.
1114  Opts.SizedDeallocation = Opts.CPlusPlus1y;
1115}
1116
1117/// Attempt to parse a visibility value out of the given argument.
1118static Visibility parseVisibility(Arg *arg, ArgList &args,
1119                                  DiagnosticsEngine &diags) {
1120  StringRef value = arg->getValue();
1121  if (value == "default") {
1122    return DefaultVisibility;
1123  } else if (value == "hidden") {
1124    return HiddenVisibility;
1125  } else if (value == "protected") {
1126    // FIXME: diagnose if target does not support protected visibility
1127    return ProtectedVisibility;
1128  }
1129
1130  diags.Report(diag::err_drv_invalid_value)
1131    << arg->getAsString(args) << value;
1132  return DefaultVisibility;
1133}
1134
1135static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1136                          DiagnosticsEngine &Diags) {
1137  // FIXME: Cleanup per-file based stuff.
1138  LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1139  if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1140    LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1141#define LANGSTANDARD(id, name, desc, features) \
1142      .Case(name, LangStandard::lang_##id)
1143#include "clang/Frontend/LangStandards.def"
1144      .Default(LangStandard::lang_unspecified);
1145    if (LangStd == LangStandard::lang_unspecified)
1146      Diags.Report(diag::err_drv_invalid_value)
1147        << A->getAsString(Args) << A->getValue();
1148    else {
1149      // Valid standard, check to make sure language and standard are compatable.
1150      const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1151      switch (IK) {
1152      case IK_C:
1153      case IK_ObjC:
1154      case IK_PreprocessedC:
1155      case IK_PreprocessedObjC:
1156        if (!(Std.isC89() || Std.isC99()))
1157          Diags.Report(diag::err_drv_argument_not_allowed_with)
1158            << A->getAsString(Args) << "C/ObjC";
1159        break;
1160      case IK_CXX:
1161      case IK_ObjCXX:
1162      case IK_PreprocessedCXX:
1163      case IK_PreprocessedObjCXX:
1164        if (!Std.isCPlusPlus())
1165          Diags.Report(diag::err_drv_argument_not_allowed_with)
1166            << A->getAsString(Args) << "C++/ObjC++";
1167        break;
1168      case IK_OpenCL:
1169        if (!Std.isC99())
1170          Diags.Report(diag::err_drv_argument_not_allowed_with)
1171            << A->getAsString(Args) << "OpenCL";
1172        break;
1173      case IK_CUDA:
1174        if (!Std.isCPlusPlus())
1175          Diags.Report(diag::err_drv_argument_not_allowed_with)
1176            << A->getAsString(Args) << "CUDA";
1177        break;
1178      default:
1179        break;
1180      }
1181    }
1182  }
1183
1184  // -cl-std only applies for OpenCL language standards.
1185  // Override the -std option in this case.
1186  if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1187    LangStandard::Kind OpenCLLangStd
1188    = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1189    .Case("CL", LangStandard::lang_opencl)
1190    .Case("CL1.1", LangStandard::lang_opencl11)
1191    .Case("CL1.2", LangStandard::lang_opencl12)
1192    .Default(LangStandard::lang_unspecified);
1193
1194    if (OpenCLLangStd == LangStandard::lang_unspecified) {
1195      Diags.Report(diag::err_drv_invalid_value)
1196      << A->getAsString(Args) << A->getValue();
1197    }
1198    else
1199      LangStd = OpenCLLangStd;
1200  }
1201
1202  CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1203
1204  // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1205  // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1206  // while a subset (the non-C++ GNU keywords) is provided by GCC's
1207  // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1208  // name, as it doesn't seem a useful distinction.
1209  Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1210                                  Opts.GNUKeywords);
1211
1212  if (Args.hasArg(OPT_fno_operator_names))
1213    Opts.CXXOperatorNames = 0;
1214
1215  if (Opts.ObjC1) {
1216    if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1217      StringRef value = arg->getValue();
1218      if (Opts.ObjCRuntime.tryParse(value))
1219        Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1220    }
1221
1222    if (Args.hasArg(OPT_fobjc_gc_only))
1223      Opts.setGC(LangOptions::GCOnly);
1224    else if (Args.hasArg(OPT_fobjc_gc))
1225      Opts.setGC(LangOptions::HybridGC);
1226    else if (Args.hasArg(OPT_fobjc_arc)) {
1227      Opts.ObjCAutoRefCount = 1;
1228      if (!Opts.ObjCRuntime.allowsARC())
1229        Diags.Report(diag::err_arc_unsupported_on_runtime);
1230
1231      // Only set ObjCARCWeak if ARC is enabled.
1232      if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1233        Opts.ObjCARCWeak = 1;
1234      else
1235        Opts.ObjCARCWeak = Opts.ObjCRuntime.allowsWeak();
1236    }
1237
1238    if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1239      Opts.ObjCInferRelatedResultType = 0;
1240
1241    if (Args.hasArg(OPT_fobjc_subscripting_legacy_runtime))
1242      Opts.ObjCSubscriptingLegacyRuntime =
1243        (Opts.ObjCRuntime.getKind() == ObjCRuntime::FragileMacOSX);
1244  }
1245
1246  if (Args.hasArg(OPT_fgnu89_inline))
1247    Opts.GNUInline = 1;
1248
1249  if (Args.hasArg(OPT_fapple_kext)) {
1250    if (!Opts.CPlusPlus)
1251      Diags.Report(diag::warn_c_kext);
1252    else
1253      Opts.AppleKext = 1;
1254  }
1255
1256  if (Args.hasArg(OPT_print_ivar_layout))
1257    Opts.ObjCGCBitmapPrint = 1;
1258  if (Args.hasArg(OPT_fno_constant_cfstrings))
1259    Opts.NoConstantCFStrings = 1;
1260
1261  if (Args.hasArg(OPT_faltivec))
1262    Opts.AltiVec = 1;
1263
1264  if (Args.hasArg(OPT_pthread))
1265    Opts.POSIXThreads = 1;
1266
1267  // The value-visibility mode defaults to "default".
1268  if (Arg *visOpt = Args.getLastArg(OPT_fvisibility)) {
1269    Opts.setValueVisibilityMode(parseVisibility(visOpt, Args, Diags));
1270  } else {
1271    Opts.setValueVisibilityMode(DefaultVisibility);
1272  }
1273
1274  // The type-visibility mode defaults to the value-visibility mode.
1275  if (Arg *typeVisOpt = Args.getLastArg(OPT_ftype_visibility)) {
1276    Opts.setTypeVisibilityMode(parseVisibility(typeVisOpt, Args, Diags));
1277  } else {
1278    Opts.setTypeVisibilityMode(Opts.getValueVisibilityMode());
1279  }
1280
1281  if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1282    Opts.InlineVisibilityHidden = 1;
1283
1284  if (Args.hasArg(OPT_ftrapv)) {
1285    Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1286    // Set the handler, if one is specified.
1287    Opts.OverflowHandler =
1288        Args.getLastArgValue(OPT_ftrapv_handler);
1289  }
1290  else if (Args.hasArg(OPT_fwrapv))
1291    Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1292
1293  if (Args.hasArg(OPT_trigraphs))
1294    Opts.Trigraphs = 1;
1295
1296  Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1297                                   OPT_fno_dollars_in_identifiers,
1298                                   Opts.DollarIdents);
1299  Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1300  Opts.MicrosoftExt
1301    = Args.hasArg(OPT_fms_extensions) || Args.hasArg(OPT_fms_compatibility);
1302  Opts.MicrosoftMode = Args.hasArg(OPT_fms_compatibility);
1303  Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
1304  Opts.MSCVersion = getLastArgIntValue(Args, OPT_fmsc_version, 0, Diags);
1305  Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1306  Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1307  Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
1308                                   Opts.ConstStrings);
1309  if (Args.hasArg(OPT_fno_lax_vector_conversions))
1310    Opts.LaxVectorConversions = 0;
1311  if (Args.hasArg(OPT_fno_threadsafe_statics))
1312    Opts.ThreadsafeStatics = 0;
1313  Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1314  Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
1315  Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
1316  Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1317  Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
1318
1319  Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1320  Opts.Blocks = Args.hasArg(OPT_fblocks);
1321  Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
1322  Opts.Modules = Args.hasArg(OPT_fmodules);
1323  Opts.ModulesDeclUse = Args.hasArg(OPT_fmodules_decluse);
1324  Opts.CharIsSigned = Opts.OpenCL || !Args.hasArg(OPT_fno_signed_char);
1325  Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
1326  Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1327  Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1328  Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1329  Opts.FormatExtensions = Args.hasArg(OPT_fformat_extensions);
1330  Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1331  Opts.NoMathBuiltin = Args.hasArg(OPT_fno_math_builtin);
1332  Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1333  Opts.SizedDeallocation |= Args.hasArg(OPT_fsized_deallocation);
1334  Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1335  Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1336  Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1337  Opts.MathErrno = !Opts.OpenCL && Args.hasArg(OPT_fmath_errno);
1338  Opts.InstantiationDepth =
1339      getLastArgIntValue(Args, OPT_ftemplate_depth, 256, Diags);
1340  Opts.ArrowDepth =
1341      getLastArgIntValue(Args, OPT_foperator_arrow_depth, 256, Diags);
1342  Opts.ConstexprCallDepth =
1343      getLastArgIntValue(Args, OPT_fconstexpr_depth, 512, Diags);
1344  Opts.ConstexprStepLimit =
1345      getLastArgIntValue(Args, OPT_fconstexpr_steps, 1048576, Diags);
1346  Opts.BracketDepth = getLastArgIntValue(Args, OPT_fbracket_depth, 256, Diags);
1347  Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
1348  Opts.NumLargeByValueCopy =
1349      getLastArgIntValue(Args, OPT_Wlarge_by_value_copy_EQ, 0, Diags);
1350  Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
1351  Opts.ObjCConstantStringClass =
1352    Args.getLastArgValue(OPT_fconstant_string_class);
1353  Opts.ObjCDefaultSynthProperties =
1354    !Args.hasArg(OPT_disable_objc_default_synthesize_properties);
1355  Opts.EncodeExtendedBlockSig =
1356    Args.hasArg(OPT_fencode_extended_block_signature);
1357  Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1358  Opts.PackStruct = getLastArgIntValue(Args, OPT_fpack_struct_EQ, 0, Diags);
1359  Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
1360  Opts.PIELevel = getLastArgIntValue(Args, OPT_pie_level, 0, Diags);
1361  Opts.Static = Args.hasArg(OPT_static_define);
1362  Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
1363  Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
1364                        || Args.hasArg(OPT_fdump_record_layouts);
1365  Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1366  Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1367  Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1368  Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
1369  Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
1370  Opts.MRTD = Args.hasArg(OPT_mrtd);
1371  Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
1372  Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
1373  Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
1374  Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
1375  Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
1376  Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
1377  Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
1378  Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
1379
1380  if (Arg *A = Args.getLastArg(OPT_faddress_space_map_mangling_EQ)) {
1381    switch (llvm::StringSwitch<unsigned>(A->getValue())
1382      .Case("target", LangOptions::ASMM_Target)
1383      .Case("no", LangOptions::ASMM_Off)
1384      .Case("yes", LangOptions::ASMM_On)
1385      .Default(255)) {
1386    default:
1387      Diags.Report(diag::err_drv_invalid_value)
1388        << "-faddress-space-map-mangling=" << A->getValue();
1389      break;
1390    case LangOptions::ASMM_Target:
1391      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Target);
1392      break;
1393    case LangOptions::ASMM_On:
1394      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_On);
1395      break;
1396    case LangOptions::ASMM_Off:
1397      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Off);
1398      break;
1399    }
1400  }
1401
1402  // Check if -fopenmp is specified.
1403  Opts.OpenMP = Args.hasArg(OPT_fopenmp);
1404
1405  // Record whether the __DEPRECATED define was requested.
1406  Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
1407                                 OPT_fno_deprecated_macro,
1408                                 Opts.Deprecated);
1409
1410  // FIXME: Eliminate this dependency.
1411  unsigned Opt = getOptimizationLevel(Args, IK, Diags),
1412       OptSize = getOptimizationLevelSize(Args);
1413  Opts.Optimize = Opt != 0;
1414  Opts.OptimizeSize = OptSize != 0;
1415
1416  // This is the __NO_INLINE__ define, which just depends on things like the
1417  // optimization level and -fno-inline, not actually whether the backend has
1418  // inlining enabled.
1419  Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
1420
1421  Opts.FastMath = Args.hasArg(OPT_ffast_math);
1422  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only);
1423
1424  Opts.RetainCommentsFromSystemHeaders =
1425      Args.hasArg(OPT_fretain_comments_from_system_headers);
1426
1427  unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
1428  switch (SSP) {
1429  default:
1430    Diags.Report(diag::err_drv_invalid_value)
1431      << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1432    break;
1433  case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
1434  case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
1435  case 2: Opts.setStackProtector(LangOptions::SSPReq); break;
1436  }
1437
1438  // Parse -fsanitize= arguments.
1439  std::vector<std::string> Sanitizers = Args.getAllArgValues(OPT_fsanitize_EQ);
1440  for (unsigned I = 0, N = Sanitizers.size(); I != N; ++I) {
1441    // Since the Opts.Sanitize* values are bitfields, it's a little tricky to
1442    // efficiently map string values to them. Perform the mapping indirectly:
1443    // convert strings to enumerated values, then switch over the enum to set
1444    // the right bitfield value.
1445    enum Sanitizer {
1446#define SANITIZER(NAME, ID) \
1447      ID,
1448#include "clang/Basic/Sanitizers.def"
1449      Unknown
1450    };
1451    switch (llvm::StringSwitch<unsigned>(Sanitizers[I])
1452#define SANITIZER(NAME, ID) \
1453              .Case(NAME, ID)
1454#include "clang/Basic/Sanitizers.def"
1455              .Default(Unknown)) {
1456#define SANITIZER(NAME, ID) \
1457    case ID: \
1458      Opts.Sanitize.ID = true; \
1459      break;
1460#include "clang/Basic/Sanitizers.def"
1461
1462    case Unknown:
1463      Diags.Report(diag::err_drv_invalid_value)
1464        << "-fsanitize=" << Sanitizers[I];
1465      break;
1466    }
1467  }
1468}
1469
1470static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1471                                  FileManager &FileMgr,
1472                                  DiagnosticsEngine &Diags) {
1473  using namespace options;
1474  Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1475  Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1476  if (const Arg *A = Args.getLastArg(OPT_token_cache))
1477      Opts.TokenCache = A->getValue();
1478  else
1479    Opts.TokenCache = Opts.ImplicitPTHInclude;
1480  Opts.UsePredefines = !Args.hasArg(OPT_undef);
1481  Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1482  Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1483
1484  Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
1485  for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
1486         ie = Args.filtered_end(); it != ie; ++it) {
1487    const Arg *A = *it;
1488    Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
1489  }
1490
1491  if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1492    StringRef Value(A->getValue());
1493    size_t Comma = Value.find(',');
1494    unsigned Bytes = 0;
1495    unsigned EndOfLine = 0;
1496
1497    if (Comma == StringRef::npos ||
1498        Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1499        Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1500      Diags.Report(diag::err_drv_preamble_format);
1501    else {
1502      Opts.PrecompiledPreambleBytes.first = Bytes;
1503      Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1504    }
1505  }
1506
1507  // Add macros from the command line.
1508  for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1509         ie = Args.filtered_end(); it != ie; ++it) {
1510    if ((*it)->getOption().matches(OPT_D))
1511      Opts.addMacroDef((*it)->getValue());
1512    else
1513      Opts.addMacroUndef((*it)->getValue());
1514  }
1515
1516  Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1517
1518  // Add the ordered list of -includes.
1519  for (arg_iterator it = Args.filtered_begin(OPT_include),
1520         ie = Args.filtered_end(); it != ie; ++it) {
1521    const Arg *A = *it;
1522    Opts.Includes.push_back(A->getValue());
1523  }
1524
1525  for (arg_iterator it = Args.filtered_begin(OPT_chain_include),
1526         ie = Args.filtered_end(); it != ie; ++it) {
1527    const Arg *A = *it;
1528    Opts.ChainedIncludes.push_back(A->getValue());
1529  }
1530
1531  // Include 'altivec.h' if -faltivec option present
1532  if (Args.hasArg(OPT_faltivec))
1533    Opts.Includes.push_back("altivec.h");
1534
1535  for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1536         ie = Args.filtered_end(); it != ie; ++it) {
1537    const Arg *A = *it;
1538    std::pair<StringRef,StringRef> Split =
1539      StringRef(A->getValue()).split(';');
1540
1541    if (Split.second.empty()) {
1542      Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1543      continue;
1544    }
1545
1546    Opts.addRemappedFile(Split.first, Split.second);
1547  }
1548
1549  if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
1550    StringRef Name = A->getValue();
1551    unsigned Library = llvm::StringSwitch<unsigned>(Name)
1552      .Case("libc++", ARCXX_libcxx)
1553      .Case("libstdc++", ARCXX_libstdcxx)
1554      .Case("none", ARCXX_nolib)
1555      .Default(~0U);
1556    if (Library == ~0U)
1557      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1558    else
1559      Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
1560  }
1561}
1562
1563static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1564                                        ArgList &Args,
1565                                        frontend::ActionKind Action) {
1566  using namespace options;
1567
1568  switch (Action) {
1569  case frontend::ASTDeclList:
1570  case frontend::ASTDump:
1571  case frontend::ASTPrint:
1572  case frontend::ASTView:
1573  case frontend::EmitAssembly:
1574  case frontend::EmitBC:
1575  case frontend::EmitHTML:
1576  case frontend::EmitLLVM:
1577  case frontend::EmitLLVMOnly:
1578  case frontend::EmitCodeGenOnly:
1579  case frontend::EmitObj:
1580  case frontend::FixIt:
1581  case frontend::GenerateModule:
1582  case frontend::GeneratePCH:
1583  case frontend::GeneratePTH:
1584  case frontend::ParseSyntaxOnly:
1585  case frontend::ModuleFileInfo:
1586  case frontend::PluginAction:
1587  case frontend::PrintDeclContext:
1588  case frontend::RewriteObjC:
1589  case frontend::RewriteTest:
1590  case frontend::RunAnalysis:
1591  case frontend::MigrateSource:
1592    Opts.ShowCPP = 0;
1593    break;
1594
1595  case frontend::DumpRawTokens:
1596  case frontend::DumpTokens:
1597  case frontend::InitOnly:
1598  case frontend::PrintPreamble:
1599  case frontend::PrintPreprocessedInput:
1600  case frontend::RewriteMacros:
1601  case frontend::RunPreprocessorOnly:
1602    Opts.ShowCPP = !Args.hasArg(OPT_dM);
1603    break;
1604  }
1605
1606  Opts.ShowComments = Args.hasArg(OPT_C);
1607  Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1608  Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1609  Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1610  Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
1611}
1612
1613static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1614  using namespace options;
1615  Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1616  Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
1617  Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1618  Opts.FPMath = Args.getLastArgValue(OPT_mfpmath);
1619  Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
1620  Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1621  Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1622
1623  // Use the default target triple if unspecified.
1624  if (Opts.Triple.empty())
1625    Opts.Triple = llvm::sys::getDefaultTargetTriple();
1626}
1627
1628//
1629
1630bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1631                                        const char *const *ArgBegin,
1632                                        const char *const *ArgEnd,
1633                                        DiagnosticsEngine &Diags) {
1634  bool Success = true;
1635
1636  // Parse the arguments.
1637  OwningPtr<OptTable> Opts(createDriverOptTable());
1638  const unsigned IncludedFlagsBitmask = options::CC1Option;
1639  unsigned MissingArgIndex, MissingArgCount;
1640  OwningPtr<InputArgList> Args(
1641    Opts->ParseArgs(ArgBegin, ArgEnd, MissingArgIndex, MissingArgCount,
1642                    IncludedFlagsBitmask));
1643
1644  // Check for missing argument error.
1645  if (MissingArgCount) {
1646    Diags.Report(diag::err_drv_missing_argument)
1647      << Args->getArgString(MissingArgIndex) << MissingArgCount;
1648    Success = false;
1649  }
1650
1651  // Issue errors on unknown arguments.
1652  for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1653         ie = Args->filtered_end(); it != ie; ++it) {
1654    Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
1655    Success = false;
1656  }
1657
1658  Success = ParseAnalyzerArgs(*Res.getAnalyzerOpts(), *Args, Diags) && Success;
1659  Success = ParseMigratorArgs(Res.getMigratorOpts(), *Args) && Success;
1660  ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1661  Success = ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, &Diags)
1662            && Success;
1663  ParseCommentArgs(Res.getLangOpts()->CommentOpts, *Args);
1664  ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
1665  // FIXME: We shouldn't have to pass the DashX option around here
1666  InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1667  ParseTargetArgs(Res.getTargetOpts(), *Args);
1668  Success = ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags,
1669                             Res.getTargetOpts()) && Success;
1670  ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1671  if (DashX != IK_AST && DashX != IK_LLVM_IR) {
1672    ParseLangArgs(*Res.getLangOpts(), *Args, DashX, Diags);
1673    if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
1674      Res.getLangOpts()->ObjCExceptions = 1;
1675  }
1676  // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
1677  // PCH file and find the original header name. Remove the need to do that in
1678  // ParsePreprocessorArgs and remove the FileManager
1679  // parameters from the function and the "FileManager.h" #include.
1680  FileManager FileMgr(Res.getFileSystemOpts());
1681  ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
1682  ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args,
1683                              Res.getFrontendOpts().ProgramAction);
1684  return Success;
1685}
1686
1687namespace {
1688
1689  class ModuleSignature {
1690    SmallVector<uint64_t, 16> Data;
1691    unsigned CurBit;
1692    uint64_t CurValue;
1693
1694  public:
1695    ModuleSignature() : CurBit(0), CurValue(0) { }
1696
1697    void add(uint64_t Value, unsigned Bits);
1698    void add(StringRef Value);
1699    void flush();
1700
1701    llvm::APInt getAsInteger() const;
1702  };
1703}
1704
1705void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
1706  CurValue |= Value << CurBit;
1707  if (CurBit + NumBits < 64) {
1708    CurBit += NumBits;
1709    return;
1710  }
1711
1712  // Add the current word.
1713  Data.push_back(CurValue);
1714
1715  if (CurBit)
1716    CurValue = Value >> (64-CurBit);
1717  else
1718    CurValue = 0;
1719  CurBit = (CurBit+NumBits) & 63;
1720}
1721
1722void ModuleSignature::flush() {
1723  if (CurBit == 0)
1724    return;
1725
1726  Data.push_back(CurValue);
1727  CurBit = 0;
1728  CurValue = 0;
1729}
1730
1731void ModuleSignature::add(StringRef Value) {
1732  for (StringRef::iterator I = Value.begin(), IEnd = Value.end(); I != IEnd;++I)
1733    add(*I, 8);
1734}
1735
1736llvm::APInt ModuleSignature::getAsInteger() const {
1737  return llvm::APInt(Data.size() * 64, Data);
1738}
1739
1740std::string CompilerInvocation::getModuleHash() const {
1741  // Note: For QoI reasons, the things we use as a hash here should all be
1742  // dumped via the -module-info flag.
1743  using llvm::hash_code;
1744  using llvm::hash_value;
1745  using llvm::hash_combine;
1746
1747  // Start the signature with the compiler version.
1748  // FIXME: We'd rather use something more cryptographically sound than
1749  // CityHash, but this will do for now.
1750  hash_code code = hash_value(getClangFullRepositoryVersion());
1751
1752  // Extend the signature with the language options
1753#define LANGOPT(Name, Bits, Default, Description) \
1754   code = hash_combine(code, LangOpts->Name);
1755#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
1756  code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
1757#define BENIGN_LANGOPT(Name, Bits, Default, Description)
1758#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
1759#include "clang/Basic/LangOptions.def"
1760
1761  // Extend the signature with the target options.
1762  code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
1763                      TargetOpts->ABI, TargetOpts->CXXABI,
1764                      TargetOpts->LinkerVersion);
1765  for (unsigned i = 0, n = TargetOpts->FeaturesAsWritten.size(); i != n; ++i)
1766    code = hash_combine(code, TargetOpts->FeaturesAsWritten[i]);
1767
1768  // Extend the signature with preprocessor options.
1769  const PreprocessorOptions &ppOpts = getPreprocessorOpts();
1770  const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
1771  code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
1772
1773  std::vector<StringRef> MacroDefs;
1774  for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
1775            I = getPreprocessorOpts().Macros.begin(),
1776         IEnd = getPreprocessorOpts().Macros.end();
1777       I != IEnd; ++I) {
1778    // If we're supposed to ignore this macro for the purposes of modules,
1779    // don't put it into the hash.
1780    if (!hsOpts.ModulesIgnoreMacros.empty()) {
1781      // Check whether we're ignoring this macro.
1782      StringRef MacroDef = I->first;
1783      if (hsOpts.ModulesIgnoreMacros.count(MacroDef.split('=').first))
1784        continue;
1785    }
1786
1787    code = hash_combine(code, I->first, I->second);
1788  }
1789
1790  // Extend the signature with the sysroot.
1791  code = hash_combine(code, hsOpts.Sysroot, hsOpts.UseBuiltinIncludes,
1792                      hsOpts.UseStandardSystemIncludes,
1793                      hsOpts.UseStandardCXXIncludes,
1794                      hsOpts.UseLibcxx);
1795
1796  // Darwin-specific hack: if we have a sysroot, use the contents and
1797  // modification time of
1798  //   $sysroot/System/Library/CoreServices/SystemVersion.plist
1799  // as part of the module hash.
1800  if (!hsOpts.Sysroot.empty()) {
1801    llvm::OwningPtr<llvm::MemoryBuffer> buffer;
1802    SmallString<128> systemVersionFile;
1803    systemVersionFile += hsOpts.Sysroot;
1804    llvm::sys::path::append(systemVersionFile, "System");
1805    llvm::sys::path::append(systemVersionFile, "Library");
1806    llvm::sys::path::append(systemVersionFile, "CoreServices");
1807    llvm::sys::path::append(systemVersionFile, "SystemVersion.plist");
1808    if (!llvm::MemoryBuffer::getFile(systemVersionFile.str(), buffer)) {
1809      code = hash_combine(code, buffer.get()->getBuffer());
1810
1811      struct stat statBuf;
1812      if (stat(systemVersionFile.c_str(), &statBuf) == 0)
1813        code = hash_combine(code, statBuf.st_mtime);
1814    }
1815  }
1816
1817  return llvm::APInt(64, code).toString(36, /*Signed=*/false);
1818}
1819
1820namespace clang {
1821
1822// Declared in clang/Frontend/Utils.h.
1823int getLastArgIntValue(const ArgList &Args, OptSpecifier Id, int Default,
1824                       DiagnosticsEngine *Diags) {
1825  int Res = Default;
1826  if (Arg *A = Args.getLastArg(Id)) {
1827    if (StringRef(A->getValue()).getAsInteger(10, Res)) {
1828      if (Diags)
1829        Diags->Report(diag::err_drv_invalid_int_value) << A->getAsString(Args)
1830                                                       << A->getValue();
1831    }
1832  }
1833  return Res;
1834}
1835}
1836