Driver.cpp revision b8a3e8139b9fe513500c89bbcd9133415654a689 
1//===--- Driver.cpp - Clang GCC Compatible Driver -------------------------===//
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#ifdef HAVE_CLANG_CONFIG_H
11# include "clang/Config/config.h"
12#endif
13
14#include "clang/Driver/Driver.h"
15
16#include "clang/Driver/Action.h"
17#include "clang/Driver/Arg.h"
18#include "clang/Driver/ArgList.h"
19#include "clang/Driver/Compilation.h"
20#include "clang/Driver/DriverDiagnostic.h"
21#include "clang/Driver/HostInfo.h"
22#include "clang/Driver/Job.h"
23#include "clang/Driver/OptTable.h"
24#include "clang/Driver/Option.h"
25#include "clang/Driver/Options.h"
26#include "clang/Driver/Tool.h"
27#include "clang/Driver/ToolChain.h"
28#include "clang/Driver/Types.h"
29
30#include "clang/Basic/Version.h"
31
32#include "llvm/Config/config.h"
33#include "llvm/ADT/ArrayRef.h"
34#include "llvm/ADT/StringSet.h"
35#include "llvm/ADT/OwningPtr.h"
36#include "llvm/Support/PrettyStackTrace.h"
37#include "llvm/Support/raw_ostream.h"
38#include "llvm/Support/FileSystem.h"
39#include "llvm/Support/Path.h"
40#include "llvm/Support/Program.h"
41
42#include "InputInfo.h"
43
44#include <map>
45
46using namespace clang::driver;
47using namespace clang;
48
49Driver::Driver(llvm::StringRef _ClangExecutable,
50               llvm::StringRef _DefaultHostTriple,
51               llvm::StringRef _DefaultImageName,
52               bool IsProduction, bool CXXIsProduction,
53               Diagnostic &_Diags)
54  : Opts(createDriverOptTable()), Diags(_Diags),
55    ClangExecutable(_ClangExecutable), UseStdLib(true),
56    DefaultHostTriple(_DefaultHostTriple), DefaultImageName(_DefaultImageName),
57    DriverTitle("clang \"gcc-compatible\" driver"),
58    Host(0),
59    CCPrintOptionsFilename(0), CCPrintHeadersFilename(0),
60    CCLogDiagnosticsFilename(0), CCCIsCXX(false),
61    CCCIsCPP(false),CCCEcho(false), CCCPrintBindings(false),
62    CCPrintOptions(false), CCPrintHeaders(false), CCLogDiagnostics(false),
63    CCCGenericGCCName(""), CheckInputsExist(true), CCCUseClang(true),
64    CCCUseClangCXX(true), CCCUseClangCPP(true), CCCUsePCH(true),
65    SuppressMissingInputWarning(false) {
66  if (IsProduction) {
67    // In a "production" build, only use clang on architectures we expect to
68    // work, and don't use clang C++.
69    //
70    // During development its more convenient to always have the driver use
71    // clang, but we don't want users to be confused when things don't work, or
72    // to file bugs for things we don't support.
73    CCCClangArchs.insert(llvm::Triple::x86);
74    CCCClangArchs.insert(llvm::Triple::x86_64);
75    CCCClangArchs.insert(llvm::Triple::arm);
76
77    if (!CXXIsProduction)
78      CCCUseClangCXX = false;
79  }
80
81  Name = llvm::sys::path::stem(ClangExecutable);
82  Dir  = llvm::sys::path::parent_path(ClangExecutable);
83
84  // Compute the path to the resource directory.
85  llvm::StringRef ClangResourceDir(CLANG_RESOURCE_DIR);
86  llvm::SmallString<128> P(Dir);
87  if (ClangResourceDir != "")
88    llvm::sys::path::append(P, ClangResourceDir);
89  else
90    llvm::sys::path::append(P, "..", "lib", "clang", CLANG_VERSION_STRING);
91  ResourceDir = P.str();
92}
93
94Driver::~Driver() {
95  delete Opts;
96  delete Host;
97}
98
99InputArgList *Driver::ParseArgStrings(llvm::ArrayRef<const char *> ArgList) {
100  llvm::PrettyStackTraceString CrashInfo("Command line argument parsing");
101  unsigned MissingArgIndex, MissingArgCount;
102  InputArgList *Args = getOpts().ParseArgs(ArgList.begin(), ArgList.end(),
103                                           MissingArgIndex, MissingArgCount);
104
105  // Check for missing argument error.
106  if (MissingArgCount)
107    Diag(clang::diag::err_drv_missing_argument)
108      << Args->getArgString(MissingArgIndex) << MissingArgCount;
109
110  // Check for unsupported options.
111  for (ArgList::const_iterator it = Args->begin(), ie = Args->end();
112       it != ie; ++it) {
113    Arg *A = *it;
114    if (A->getOption().isUnsupported()) {
115      Diag(clang::diag::err_drv_unsupported_opt) << A->getAsString(*Args);
116      continue;
117    }
118  }
119
120  return Args;
121}
122
123DerivedArgList *Driver::TranslateInputArgs(const InputArgList &Args) const {
124  DerivedArgList *DAL = new DerivedArgList(Args);
125
126  bool HasNostdlib = Args.hasArg(options::OPT_nostdlib);
127  for (ArgList::const_iterator it = Args.begin(),
128         ie = Args.end(); it != ie; ++it) {
129    const Arg *A = *it;
130
131    // Unfortunately, we have to parse some forwarding options (-Xassembler,
132    // -Xlinker, -Xpreprocessor) because we either integrate their functionality
133    // (assembler and preprocessor), or bypass a previous driver ('collect2').
134
135    // Rewrite linker options, to replace --no-demangle with a custom internal
136    // option.
137    if ((A->getOption().matches(options::OPT_Wl_COMMA) ||
138         A->getOption().matches(options::OPT_Xlinker)) &&
139        A->containsValue("--no-demangle")) {
140      // Add the rewritten no-demangle argument.
141      DAL->AddFlagArg(A, Opts->getOption(options::OPT_Z_Xlinker__no_demangle));
142
143      // Add the remaining values as Xlinker arguments.
144      for (unsigned i = 0, e = A->getNumValues(); i != e; ++i)
145        if (llvm::StringRef(A->getValue(Args, i)) != "--no-demangle")
146          DAL->AddSeparateArg(A, Opts->getOption(options::OPT_Xlinker),
147                              A->getValue(Args, i));
148
149      continue;
150    }
151
152    // Rewrite preprocessor options, to replace -Wp,-MD,FOO which is used by
153    // some build systems. We don't try to be complete here because we don't
154    // care to encourage this usage model.
155    if (A->getOption().matches(options::OPT_Wp_COMMA) &&
156        A->getNumValues() == 2 &&
157        (A->getValue(Args, 0) == llvm::StringRef("-MD") ||
158         A->getValue(Args, 0) == llvm::StringRef("-MMD"))) {
159      // Rewrite to -MD/-MMD along with -MF.
160      if (A->getValue(Args, 0) == llvm::StringRef("-MD"))
161        DAL->AddFlagArg(A, Opts->getOption(options::OPT_MD));
162      else
163        DAL->AddFlagArg(A, Opts->getOption(options::OPT_MMD));
164      DAL->AddSeparateArg(A, Opts->getOption(options::OPT_MF),
165                          A->getValue(Args, 1));
166      continue;
167    }
168
169    // Rewrite reserved library names.
170    if (A->getOption().matches(options::OPT_l)) {
171      llvm::StringRef Value = A->getValue(Args);
172
173      // Rewrite unless -nostdlib is present.
174      if (!HasNostdlib && Value == "stdc++") {
175        DAL->AddFlagArg(A, Opts->getOption(
176                              options::OPT_Z_reserved_lib_stdcxx));
177        continue;
178      }
179
180      // Rewrite unconditionally.
181      if (Value == "cc_kext") {
182        DAL->AddFlagArg(A, Opts->getOption(
183                              options::OPT_Z_reserved_lib_cckext));
184        continue;
185      }
186    }
187
188    DAL->append(*it);
189  }
190
191  // Add a default value of -mlinker-version=, if one was given and the user
192  // didn't specify one.
193#if defined(HOST_LINK_VERSION)
194  if (!Args.hasArg(options::OPT_mlinker_version_EQ)) {
195    DAL->AddJoinedArg(0, Opts->getOption(options::OPT_mlinker_version_EQ),
196                      HOST_LINK_VERSION);
197    DAL->getLastArg(options::OPT_mlinker_version_EQ)->claim();
198  }
199#endif
200
201  return DAL;
202}
203
204Compilation *Driver::BuildCompilation(llvm::ArrayRef<const char *> ArgList) {
205  llvm::PrettyStackTraceString CrashInfo("Compilation construction");
206
207  // FIXME: Handle environment options which effect driver behavior, somewhere
208  // (client?). GCC_EXEC_PREFIX, COMPILER_PATH, LIBRARY_PATH, LPATH,
209  // CC_PRINT_OPTIONS.
210
211  // FIXME: What are we going to do with -V and -b?
212
213  // FIXME: This stuff needs to go into the Compilation, not the driver.
214  bool CCCPrintOptions = false, CCCPrintActions = false;
215
216  InputArgList *Args = ParseArgStrings(ArgList.slice(1));
217
218  // -no-canonical-prefixes is used very early in main.
219  Args->ClaimAllArgs(options::OPT_no_canonical_prefixes);
220
221  // Ignore -pipe.
222  Args->ClaimAllArgs(options::OPT_pipe);
223
224  // Extract -ccc args.
225  //
226  // FIXME: We need to figure out where this behavior should live. Most of it
227  // should be outside in the client; the parts that aren't should have proper
228  // options, either by introducing new ones or by overloading gcc ones like -V
229  // or -b.
230  CCCPrintOptions = Args->hasArg(options::OPT_ccc_print_options);
231  CCCPrintActions = Args->hasArg(options::OPT_ccc_print_phases);
232  CCCPrintBindings = Args->hasArg(options::OPT_ccc_print_bindings);
233  CCCIsCXX = Args->hasArg(options::OPT_ccc_cxx) || CCCIsCXX;
234  CCCEcho = Args->hasArg(options::OPT_ccc_echo);
235  if (const Arg *A = Args->getLastArg(options::OPT_ccc_gcc_name))
236    CCCGenericGCCName = A->getValue(*Args);
237  CCCUseClangCXX = Args->hasFlag(options::OPT_ccc_clang_cxx,
238                                 options::OPT_ccc_no_clang_cxx,
239                                 CCCUseClangCXX);
240  CCCUsePCH = Args->hasFlag(options::OPT_ccc_pch_is_pch,
241                            options::OPT_ccc_pch_is_pth);
242  CCCUseClang = !Args->hasArg(options::OPT_ccc_no_clang);
243  CCCUseClangCPP = !Args->hasArg(options::OPT_ccc_no_clang_cpp);
244  if (const Arg *A = Args->getLastArg(options::OPT_ccc_clang_archs)) {
245    llvm::StringRef Cur = A->getValue(*Args);
246
247    CCCClangArchs.clear();
248    while (!Cur.empty()) {
249      std::pair<llvm::StringRef, llvm::StringRef> Split = Cur.split(',');
250
251      if (!Split.first.empty()) {
252        llvm::Triple::ArchType Arch =
253          llvm::Triple(Split.first, "", "").getArch();
254
255        if (Arch == llvm::Triple::UnknownArch)
256          Diag(clang::diag::err_drv_invalid_arch_name) << Split.first;
257
258        CCCClangArchs.insert(Arch);
259      }
260
261      Cur = Split.second;
262    }
263  }
264  // FIXME: We shouldn't overwrite the default host triple here, but we have
265  // nowhere else to put this currently.
266  if (const Arg *A = Args->getLastArg(options::OPT_ccc_host_triple))
267    DefaultHostTriple = A->getValue(*Args);
268  if (const Arg *A = Args->getLastArg(options::OPT_ccc_install_dir))
269    Dir = InstalledDir = A->getValue(*Args);
270  for (arg_iterator it = Args->filtered_begin(options::OPT_B),
271         ie = Args->filtered_end(); it != ie; ++it) {
272    const Arg *A = *it;
273    A->claim();
274    PrefixDirs.push_back(A->getValue(*Args, 0));
275  }
276  if (const Arg *A = Args->getLastArg(options::OPT__sysroot_EQ))
277    SysRoot = A->getValue(*Args);
278  if (Args->hasArg(options::OPT_nostdlib))
279    UseStdLib = false;
280
281  Host = GetHostInfo(DefaultHostTriple.c_str());
282
283  // Perform the default argument translations.
284  DerivedArgList *TranslatedArgs = TranslateInputArgs(*Args);
285
286  // The compilation takes ownership of Args.
287  Compilation *C = new Compilation(*this, *Host->CreateToolChain(*Args), Args,
288                                   TranslatedArgs);
289
290  // FIXME: This behavior shouldn't be here.
291  if (CCCPrintOptions) {
292    PrintOptions(C->getInputArgs());
293    return C;
294  }
295
296  if (!HandleImmediateArgs(*C))
297    return C;
298
299  // Construct the list of abstract actions to perform for this compilation.
300  if (Host->useDriverDriver())
301    BuildUniversalActions(C->getDefaultToolChain(), C->getArgs(),
302                          C->getActions());
303  else
304    BuildActions(C->getDefaultToolChain(), C->getArgs(), C->getActions());
305
306  if (CCCPrintActions) {
307    PrintActions(*C);
308    return C;
309  }
310
311  BuildJobs(*C);
312
313  return C;
314}
315
316int Driver::ExecuteCompilation(const Compilation &C) const {
317  // Just print if -### was present.
318  if (C.getArgs().hasArg(options::OPT__HASH_HASH_HASH)) {
319    C.PrintJob(llvm::errs(), C.getJobs(), "\n", true);
320    return 0;
321  }
322
323  // If there were errors building the compilation, quit now.
324  if (getDiags().hasErrorOccurred())
325    return 1;
326
327  const Command *FailingCommand = 0;
328  int Res = C.ExecuteJob(C.getJobs(), FailingCommand);
329
330  // Remove temp files.
331  C.CleanupFileList(C.getTempFiles());
332
333  // If the command succeeded, we are done.
334  if (Res == 0)
335    return Res;
336
337  // Otherwise, remove result files as well.
338  if (!C.getArgs().hasArg(options::OPT_save_temps))
339    C.CleanupFileList(C.getResultFiles(), true);
340
341  // Print extra information about abnormal failures, if possible.
342  //
343  // This is ad-hoc, but we don't want to be excessively noisy. If the result
344  // status was 1, assume the command failed normally. In particular, if it was
345  // the compiler then assume it gave a reasonable error code. Failures in other
346  // tools are less common, and they generally have worse diagnostics, so always
347  // print the diagnostic there.
348  const Tool &FailingTool = FailingCommand->getCreator();
349
350  if (!FailingCommand->getCreator().hasGoodDiagnostics() || Res != 1) {
351    // FIXME: See FIXME above regarding result code interpretation.
352    if (Res < 0)
353      Diag(clang::diag::err_drv_command_signalled)
354        << FailingTool.getShortName() << -Res;
355    else
356      Diag(clang::diag::err_drv_command_failed)
357        << FailingTool.getShortName() << Res;
358  }
359
360  return Res;
361}
362
363void Driver::PrintOptions(const ArgList &Args) const {
364  unsigned i = 0;
365  for (ArgList::const_iterator it = Args.begin(), ie = Args.end();
366       it != ie; ++it, ++i) {
367    Arg *A = *it;
368    llvm::errs() << "Option " << i << " - "
369                 << "Name: \"" << A->getOption().getName() << "\", "
370                 << "Values: {";
371    for (unsigned j = 0; j < A->getNumValues(); ++j) {
372      if (j)
373        llvm::errs() << ", ";
374      llvm::errs() << '"' << A->getValue(Args, j) << '"';
375    }
376    llvm::errs() << "}\n";
377  }
378}
379
380void Driver::PrintHelp(bool ShowHidden) const {
381  getOpts().PrintHelp(llvm::outs(), Name.c_str(), DriverTitle.c_str(),
382                      ShowHidden);
383}
384
385void Driver::PrintVersion(const Compilation &C, llvm::raw_ostream &OS) const {
386  // FIXME: The following handlers should use a callback mechanism, we don't
387  // know what the client would like to do.
388  OS << getClangFullVersion() << '\n';
389  const ToolChain &TC = C.getDefaultToolChain();
390  OS << "Target: " << TC.getTripleString() << '\n';
391
392  // Print the threading model.
393  //
394  // FIXME: Implement correctly.
395  OS << "Thread model: " << "posix" << '\n';
396}
397
398/// PrintDiagnosticCategories - Implement the --print-diagnostic-categories
399/// option.
400static void PrintDiagnosticCategories(llvm::raw_ostream &OS) {
401  for (unsigned i = 1; // Skip the empty category.
402       const char *CategoryName = DiagnosticIDs::getCategoryNameFromID(i); ++i)
403    OS << i << ',' << CategoryName << '\n';
404}
405
406bool Driver::HandleImmediateArgs(const Compilation &C) {
407  // The order these options are handled in gcc is all over the place, but we
408  // don't expect inconsistencies w.r.t. that to matter in practice.
409
410  if (C.getArgs().hasArg(options::OPT_dumpmachine)) {
411    llvm::outs() << C.getDefaultToolChain().getTripleString() << '\n';
412    return false;
413  }
414
415  if (C.getArgs().hasArg(options::OPT_dumpversion)) {
416    // Since -dumpversion is only implemented for pedantic GCC compatibility, we
417    // return an answer which matches our definition of __VERSION__.
418    //
419    // If we want to return a more correct answer some day, then we should
420    // introduce a non-pedantically GCC compatible mode to Clang in which we
421    // provide sensible definitions for -dumpversion, __VERSION__, etc.
422    llvm::outs() << "4.2.1\n";
423    return false;
424  }
425
426  if (C.getArgs().hasArg(options::OPT__print_diagnostic_categories)) {
427    PrintDiagnosticCategories(llvm::outs());
428    return false;
429  }
430
431  if (C.getArgs().hasArg(options::OPT__help) ||
432      C.getArgs().hasArg(options::OPT__help_hidden)) {
433    PrintHelp(C.getArgs().hasArg(options::OPT__help_hidden));
434    return false;
435  }
436
437  if (C.getArgs().hasArg(options::OPT__version)) {
438    // Follow gcc behavior and use stdout for --version and stderr for -v.
439    PrintVersion(C, llvm::outs());
440    return false;
441  }
442
443  if (C.getArgs().hasArg(options::OPT_v) ||
444      C.getArgs().hasArg(options::OPT__HASH_HASH_HASH)) {
445    PrintVersion(C, llvm::errs());
446    SuppressMissingInputWarning = true;
447  }
448
449  const ToolChain &TC = C.getDefaultToolChain();
450  if (C.getArgs().hasArg(options::OPT_print_search_dirs)) {
451    llvm::outs() << "programs: =";
452    for (ToolChain::path_list::const_iterator it = TC.getProgramPaths().begin(),
453           ie = TC.getProgramPaths().end(); it != ie; ++it) {
454      if (it != TC.getProgramPaths().begin())
455        llvm::outs() << ':';
456      llvm::outs() << *it;
457    }
458    llvm::outs() << "\n";
459    llvm::outs() << "libraries: =";
460    for (ToolChain::path_list::const_iterator it = TC.getFilePaths().begin(),
461           ie = TC.getFilePaths().end(); it != ie; ++it) {
462      if (it != TC.getFilePaths().begin())
463        llvm::outs() << ':';
464      llvm::outs() << *it;
465    }
466    llvm::outs() << "\n";
467    return false;
468  }
469
470  // FIXME: The following handlers should use a callback mechanism, we don't
471  // know what the client would like to do.
472  if (Arg *A = C.getArgs().getLastArg(options::OPT_print_file_name_EQ)) {
473    llvm::outs() << GetFilePath(A->getValue(C.getArgs()), TC) << "\n";
474    return false;
475  }
476
477  if (Arg *A = C.getArgs().getLastArg(options::OPT_print_prog_name_EQ)) {
478    llvm::outs() << GetProgramPath(A->getValue(C.getArgs()), TC) << "\n";
479    return false;
480  }
481
482  if (C.getArgs().hasArg(options::OPT_print_libgcc_file_name)) {
483    llvm::outs() << GetFilePath("libgcc.a", TC) << "\n";
484    return false;
485  }
486
487  if (C.getArgs().hasArg(options::OPT_print_multi_lib)) {
488    // FIXME: We need tool chain support for this.
489    llvm::outs() << ".;\n";
490
491    switch (C.getDefaultToolChain().getTriple().getArch()) {
492    default:
493      break;
494
495    case llvm::Triple::x86_64:
496      llvm::outs() << "x86_64;@m64" << "\n";
497      break;
498
499    case llvm::Triple::ppc64:
500      llvm::outs() << "ppc64;@m64" << "\n";
501      break;
502    }
503    return false;
504  }
505
506  // FIXME: What is the difference between print-multi-directory and
507  // print-multi-os-directory?
508  if (C.getArgs().hasArg(options::OPT_print_multi_directory) ||
509      C.getArgs().hasArg(options::OPT_print_multi_os_directory)) {
510    switch (C.getDefaultToolChain().getTriple().getArch()) {
511    default:
512    case llvm::Triple::x86:
513    case llvm::Triple::ppc:
514      llvm::outs() << "." << "\n";
515      break;
516
517    case llvm::Triple::x86_64:
518      llvm::outs() << "x86_64" << "\n";
519      break;
520
521    case llvm::Triple::ppc64:
522      llvm::outs() << "ppc64" << "\n";
523      break;
524    }
525    return false;
526  }
527
528  return true;
529}
530
531static unsigned PrintActions1(const Compilation &C, Action *A,
532                              std::map<Action*, unsigned> &Ids) {
533  if (Ids.count(A))
534    return Ids[A];
535
536  std::string str;
537  llvm::raw_string_ostream os(str);
538
539  os << Action::getClassName(A->getKind()) << ", ";
540  if (InputAction *IA = dyn_cast<InputAction>(A)) {
541    os << "\"" << IA->getInputArg().getValue(C.getArgs()) << "\"";
542  } else if (BindArchAction *BIA = dyn_cast<BindArchAction>(A)) {
543    os << '"' << (BIA->getArchName() ? BIA->getArchName() :
544                  C.getDefaultToolChain().getArchName()) << '"'
545       << ", {" << PrintActions1(C, *BIA->begin(), Ids) << "}";
546  } else {
547    os << "{";
548    for (Action::iterator it = A->begin(), ie = A->end(); it != ie;) {
549      os << PrintActions1(C, *it, Ids);
550      ++it;
551      if (it != ie)
552        os << ", ";
553    }
554    os << "}";
555  }
556
557  unsigned Id = Ids.size();
558  Ids[A] = Id;
559  llvm::errs() << Id << ": " << os.str() << ", "
560               << types::getTypeName(A->getType()) << "\n";
561
562  return Id;
563}
564
565void Driver::PrintActions(const Compilation &C) const {
566  std::map<Action*, unsigned> Ids;
567  for (ActionList::const_iterator it = C.getActions().begin(),
568         ie = C.getActions().end(); it != ie; ++it)
569    PrintActions1(C, *it, Ids);
570}
571
572/// \brief Check whether the given input tree contains any compilation (or
573/// assembly) actions.
574static bool ContainsCompileAction(const Action *A) {
575  if (isa<CompileJobAction>(A) || isa<AssembleJobAction>(A))
576    return true;
577
578  for (Action::const_iterator it = A->begin(), ie = A->end(); it != ie; ++it)
579    if (ContainsCompileAction(*it))
580      return true;
581
582  return false;
583}
584
585void Driver::BuildUniversalActions(const ToolChain &TC,
586                                   const DerivedArgList &Args,
587                                   ActionList &Actions) const {
588  llvm::PrettyStackTraceString CrashInfo("Building universal build actions");
589  // Collect the list of architectures. Duplicates are allowed, but should only
590  // be handled once (in the order seen).
591  llvm::StringSet<> ArchNames;
592  llvm::SmallVector<const char *, 4> Archs;
593  for (ArgList::const_iterator it = Args.begin(), ie = Args.end();
594       it != ie; ++it) {
595    Arg *A = *it;
596
597    if (A->getOption().matches(options::OPT_arch)) {
598      // Validate the option here; we don't save the type here because its
599      // particular spelling may participate in other driver choices.
600      llvm::Triple::ArchType Arch =
601        llvm::Triple::getArchTypeForDarwinArchName(A->getValue(Args));
602      if (Arch == llvm::Triple::UnknownArch) {
603        Diag(clang::diag::err_drv_invalid_arch_name)
604          << A->getAsString(Args);
605        continue;
606      }
607
608      A->claim();
609      if (ArchNames.insert(A->getValue(Args)))
610        Archs.push_back(A->getValue(Args));
611    }
612  }
613
614  // When there is no explicit arch for this platform, make sure we still bind
615  // the architecture (to the default) so that -Xarch_ is handled correctly.
616  if (!Archs.size())
617    Archs.push_back(0);
618
619  // FIXME: We killed off some others but these aren't yet detected in a
620  // functional manner. If we added information to jobs about which "auxiliary"
621  // files they wrote then we could detect the conflict these cause downstream.
622  if (Archs.size() > 1) {
623    // No recovery needed, the point of this is just to prevent
624    // overwriting the same files.
625    if (const Arg *A = Args.getLastArg(options::OPT_save_temps))
626      Diag(clang::diag::err_drv_invalid_opt_with_multiple_archs)
627        << A->getAsString(Args);
628  }
629
630  ActionList SingleActions;
631  BuildActions(TC, Args, SingleActions);
632
633  // Add in arch bindings for every top level action, as well as lipo and
634  // dsymutil steps if needed.
635  for (unsigned i = 0, e = SingleActions.size(); i != e; ++i) {
636    Action *Act = SingleActions[i];
637
638    // Make sure we can lipo this kind of output. If not (and it is an actual
639    // output) then we disallow, since we can't create an output file with the
640    // right name without overwriting it. We could remove this oddity by just
641    // changing the output names to include the arch, which would also fix
642    // -save-temps. Compatibility wins for now.
643
644    if (Archs.size() > 1 && !types::canLipoType(Act->getType()))
645      Diag(clang::diag::err_drv_invalid_output_with_multiple_archs)
646        << types::getTypeName(Act->getType());
647
648    ActionList Inputs;
649    for (unsigned i = 0, e = Archs.size(); i != e; ++i) {
650      Inputs.push_back(new BindArchAction(Act, Archs[i]));
651      if (i != 0)
652        Inputs.back()->setOwnsInputs(false);
653    }
654
655    // Lipo if necessary, we do it this way because we need to set the arch flag
656    // so that -Xarch_ gets overwritten.
657    if (Inputs.size() == 1 || Act->getType() == types::TY_Nothing)
658      Actions.append(Inputs.begin(), Inputs.end());
659    else
660      Actions.push_back(new LipoJobAction(Inputs, Act->getType()));
661
662    // Add a 'dsymutil' step if necessary, when debug info is enabled and we
663    // have a compile input. We need to run 'dsymutil' ourselves in such cases
664    // because the debug info will refer to a temporary object file which is
665    // will be removed at the end of the compilation process.
666    if (Act->getType() == types::TY_Image) {
667      Arg *A = Args.getLastArg(options::OPT_g_Group);
668      if (A && !A->getOption().matches(options::OPT_g0) &&
669          !A->getOption().matches(options::OPT_gstabs) &&
670          ContainsCompileAction(Actions.back())) {
671        ActionList Inputs;
672        Inputs.push_back(Actions.back());
673        Actions.pop_back();
674
675        Actions.push_back(new DsymutilJobAction(Inputs, types::TY_dSYM));
676      }
677    }
678  }
679}
680
681void Driver::BuildActions(const ToolChain &TC, const DerivedArgList &Args,
682                          ActionList &Actions) const {
683  llvm::PrettyStackTraceString CrashInfo("Building compilation actions");
684  // Start by constructing the list of inputs and their types.
685
686  // Track the current user specified (-x) input. We also explicitly track the
687  // argument used to set the type; we only want to claim the type when we
688  // actually use it, so we warn about unused -x arguments.
689  types::ID InputType = types::TY_Nothing;
690  Arg *InputTypeArg = 0;
691
692  llvm::SmallVector<std::pair<types::ID, const Arg*>, 16> Inputs;
693  for (ArgList::const_iterator it = Args.begin(), ie = Args.end();
694       it != ie; ++it) {
695    Arg *A = *it;
696
697    if (isa<InputOption>(A->getOption())) {
698      const char *Value = A->getValue(Args);
699      types::ID Ty = types::TY_INVALID;
700
701      // Infer the input type if necessary.
702      if (InputType == types::TY_Nothing) {
703        // If there was an explicit arg for this, claim it.
704        if (InputTypeArg)
705          InputTypeArg->claim();
706
707        // stdin must be handled specially.
708        if (memcmp(Value, "-", 2) == 0) {
709          // If running with -E, treat as a C input (this changes the builtin
710          // macros, for example). This may be overridden by -ObjC below.
711          //
712          // Otherwise emit an error but still use a valid type to avoid
713          // spurious errors (e.g., no inputs).
714          if (!Args.hasArgNoClaim(options::OPT_E) && !CCCIsCPP)
715            Diag(clang::diag::err_drv_unknown_stdin_type);
716          Ty = types::TY_C;
717        } else {
718          // Otherwise lookup by extension.
719          // Fallback is C if invoked as C preprocessor or Object otherwise.
720          // We use a host hook here because Darwin at least has its own
721          // idea of what .s is.
722          if (const char *Ext = strrchr(Value, '.'))
723            Ty = TC.LookupTypeForExtension(Ext + 1);
724
725          if (Ty == types::TY_INVALID) {
726            if (CCCIsCPP)
727              Ty = types::TY_C;
728            else
729              Ty = types::TY_Object;
730          }
731
732          // If the driver is invoked as C++ compiler (like clang++ or c++) it
733          // should autodetect some input files as C++ for g++ compatibility.
734          if (CCCIsCXX) {
735            types::ID OldTy = Ty;
736            Ty = types::lookupCXXTypeForCType(Ty);
737
738            if (Ty != OldTy)
739              Diag(clang::diag::warn_drv_treating_input_as_cxx)
740                << getTypeName(OldTy) << getTypeName(Ty);
741          }
742        }
743
744        // -ObjC and -ObjC++ override the default language, but only for "source
745        // files". We just treat everything that isn't a linker input as a
746        // source file.
747        //
748        // FIXME: Clean this up if we move the phase sequence into the type.
749        if (Ty != types::TY_Object) {
750          if (Args.hasArg(options::OPT_ObjC))
751            Ty = types::TY_ObjC;
752          else if (Args.hasArg(options::OPT_ObjCXX))
753            Ty = types::TY_ObjCXX;
754        }
755      } else {
756        assert(InputTypeArg && "InputType set w/o InputTypeArg");
757        InputTypeArg->claim();
758        Ty = InputType;
759      }
760
761      // Check that the file exists, if enabled.
762      if (CheckInputsExist && memcmp(Value, "-", 2) != 0) {
763        llvm::SmallString<64> Path(Value);
764        if (Arg *WorkDir = Args.getLastArg(options::OPT_working_directory))
765          if (llvm::sys::path::is_absolute(Path.str())) {
766            Path = WorkDir->getValue(Args);
767            llvm::sys::path::append(Path, Value);
768          }
769
770        bool exists = false;
771        if (/*error_code ec =*/llvm::sys::fs::exists(Value, exists) || !exists)
772          Diag(clang::diag::err_drv_no_such_file) << Path.str();
773        else
774          Inputs.push_back(std::make_pair(Ty, A));
775      } else
776        Inputs.push_back(std::make_pair(Ty, A));
777
778    } else if (A->getOption().isLinkerInput()) {
779      // Just treat as object type, we could make a special type for this if
780      // necessary.
781      Inputs.push_back(std::make_pair(types::TY_Object, A));
782
783    } else if (A->getOption().matches(options::OPT_x)) {
784      InputTypeArg = A;
785      InputType = types::lookupTypeForTypeSpecifier(A->getValue(Args));
786
787      // Follow gcc behavior and treat as linker input for invalid -x
788      // options. Its not clear why we shouldn't just revert to unknown; but
789      // this isn't very important, we might as well be bug compatible.
790      if (!InputType) {
791        Diag(clang::diag::err_drv_unknown_language) << A->getValue(Args);
792        InputType = types::TY_Object;
793      }
794    }
795  }
796
797  if (CCCIsCPP && Inputs.empty()) {
798    // If called as standalone preprocessor, stdin is processed
799    // if no other input is present.
800    unsigned Index = Args.getBaseArgs().MakeIndex("-");
801    Arg *A = Opts->ParseOneArg(Args, Index);
802    A->claim();
803    Inputs.push_back(std::make_pair(types::TY_C, A));
804  }
805
806  if (!SuppressMissingInputWarning && Inputs.empty()) {
807    Diag(clang::diag::err_drv_no_input_files);
808    return;
809  }
810
811  // Determine which compilation mode we are in. We look for options which
812  // affect the phase, starting with the earliest phases, and record which
813  // option we used to determine the final phase.
814  Arg *FinalPhaseArg = 0;
815  phases::ID FinalPhase;
816
817  // -{E,M,MM} only run the preprocessor.
818  if (CCCIsCPP ||
819      (FinalPhaseArg = Args.getLastArg(options::OPT_E)) ||
820      (FinalPhaseArg = Args.getLastArg(options::OPT_M, options::OPT_MM))) {
821    FinalPhase = phases::Preprocess;
822
823    // -{fsyntax-only,-analyze,emit-ast,S} only run up to the compiler.
824  } else if ((FinalPhaseArg = Args.getLastArg(options::OPT_fsyntax_only)) ||
825             (FinalPhaseArg = Args.getLastArg(options::OPT_rewrite_objc)) ||
826             (FinalPhaseArg = Args.getLastArg(options::OPT__analyze,
827                                              options::OPT__analyze_auto)) ||
828             (FinalPhaseArg = Args.getLastArg(options::OPT_emit_ast)) ||
829             (FinalPhaseArg = Args.getLastArg(options::OPT_S))) {
830    FinalPhase = phases::Compile;
831
832    // -c only runs up to the assembler.
833  } else if ((FinalPhaseArg = Args.getLastArg(options::OPT_c))) {
834    FinalPhase = phases::Assemble;
835
836    // Otherwise do everything.
837  } else
838    FinalPhase = phases::Link;
839
840  // Reject -Z* at the top level, these options should never have been exposed
841  // by gcc.
842  if (Arg *A = Args.getLastArg(options::OPT_Z_Joined))
843    Diag(clang::diag::err_drv_use_of_Z_option) << A->getAsString(Args);
844
845  // Construct the actions to perform.
846  ActionList LinkerInputs;
847  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
848    types::ID InputType = Inputs[i].first;
849    const Arg *InputArg = Inputs[i].second;
850
851    unsigned NumSteps = types::getNumCompilationPhases(InputType);
852    assert(NumSteps && "Invalid number of steps!");
853
854    // If the first step comes after the final phase we are doing as part of
855    // this compilation, warn the user about it.
856    phases::ID InitialPhase = types::getCompilationPhase(InputType, 0);
857    if (InitialPhase > FinalPhase) {
858      // Claim here to avoid the more general unused warning.
859      InputArg->claim();
860
861      // Special case '-E' warning on a previously preprocessed file to make
862      // more sense.
863      if (InitialPhase == phases::Compile && FinalPhase == phases::Preprocess &&
864          getPreprocessedType(InputType) == types::TY_INVALID)
865        Diag(clang::diag::warn_drv_preprocessed_input_file_unused)
866          << InputArg->getAsString(Args)
867          << FinalPhaseArg->getOption().getName();
868      else
869        Diag(clang::diag::warn_drv_input_file_unused)
870          << InputArg->getAsString(Args)
871          << getPhaseName(InitialPhase)
872          << FinalPhaseArg->getOption().getName();
873      continue;
874    }
875
876    // Build the pipeline for this file.
877    llvm::OwningPtr<Action> Current(new InputAction(*InputArg, InputType));
878    for (unsigned i = 0; i != NumSteps; ++i) {
879      phases::ID Phase = types::getCompilationPhase(InputType, i);
880
881      // We are done if this step is past what the user requested.
882      if (Phase > FinalPhase)
883        break;
884
885      // Queue linker inputs.
886      if (Phase == phases::Link) {
887        assert(i + 1 == NumSteps && "linking must be final compilation step.");
888        LinkerInputs.push_back(Current.take());
889        break;
890      }
891
892      // Some types skip the assembler phase (e.g., llvm-bc), but we can't
893      // encode this in the steps because the intermediate type depends on
894      // arguments. Just special case here.
895      if (Phase == phases::Assemble && Current->getType() != types::TY_PP_Asm)
896        continue;
897
898      // Otherwise construct the appropriate action.
899      Current.reset(ConstructPhaseAction(Args, Phase, Current.take()));
900      if (Current->getType() == types::TY_Nothing)
901        break;
902    }
903
904    // If we ended with something, add to the output list.
905    if (Current)
906      Actions.push_back(Current.take());
907  }
908
909  // Add a link action if necessary.
910  if (!LinkerInputs.empty())
911    Actions.push_back(new LinkJobAction(LinkerInputs, types::TY_Image));
912
913  // If we are linking, claim any options which are obviously only used for
914  // compilation.
915  if (FinalPhase == phases::Link)
916    Args.ClaimAllArgs(options::OPT_CompileOnly_Group);
917}
918
919Action *Driver::ConstructPhaseAction(const ArgList &Args, phases::ID Phase,
920                                     Action *Input) const {
921  llvm::PrettyStackTraceString CrashInfo("Constructing phase actions");
922  // Build the appropriate action.
923  switch (Phase) {
924  case phases::Link: assert(0 && "link action invalid here.");
925  case phases::Preprocess: {
926    types::ID OutputTy;
927    // -{M, MM} alter the output type.
928    if (Args.hasArg(options::OPT_M, options::OPT_MM)) {
929      OutputTy = types::TY_Dependencies;
930    } else {
931      OutputTy = types::getPreprocessedType(Input->getType());
932      assert(OutputTy != types::TY_INVALID &&
933             "Cannot preprocess this input type!");
934    }
935    return new PreprocessJobAction(Input, OutputTy);
936  }
937  case phases::Precompile:
938    return new PrecompileJobAction(Input, types::TY_PCH);
939  case phases::Compile: {
940    bool HasO4 = false;
941    if (const Arg *A = Args.getLastArg(options::OPT_O_Group))
942      HasO4 = A->getOption().matches(options::OPT_O4);
943
944    if (Args.hasArg(options::OPT_fsyntax_only)) {
945      return new CompileJobAction(Input, types::TY_Nothing);
946    } else if (Args.hasArg(options::OPT_rewrite_objc)) {
947      return new CompileJobAction(Input, types::TY_RewrittenObjC);
948    } else if (Args.hasArg(options::OPT__analyze, options::OPT__analyze_auto)) {
949      return new AnalyzeJobAction(Input, types::TY_Plist);
950    } else if (Args.hasArg(options::OPT_emit_ast)) {
951      return new CompileJobAction(Input, types::TY_AST);
952    } else if (Args.hasArg(options::OPT_emit_llvm) ||
953               Args.hasArg(options::OPT_flto) || HasO4) {
954      types::ID Output =
955        Args.hasArg(options::OPT_S) ? types::TY_LTO_IR : types::TY_LTO_BC;
956      return new CompileJobAction(Input, Output);
957    } else {
958      return new CompileJobAction(Input, types::TY_PP_Asm);
959    }
960  }
961  case phases::Assemble:
962    return new AssembleJobAction(Input, types::TY_Object);
963  }
964
965  assert(0 && "invalid phase in ConstructPhaseAction");
966  return 0;
967}
968
969void Driver::BuildJobs(Compilation &C) const {
970  llvm::PrettyStackTraceString CrashInfo("Building compilation jobs");
971
972  Arg *FinalOutput = C.getArgs().getLastArg(options::OPT_o);
973
974  // It is an error to provide a -o option if we are making multiple output
975  // files.
976  if (FinalOutput) {
977    unsigned NumOutputs = 0;
978    for (ActionList::const_iterator it = C.getActions().begin(),
979           ie = C.getActions().end(); it != ie; ++it)
980      if ((*it)->getType() != types::TY_Nothing)
981        ++NumOutputs;
982
983    if (NumOutputs > 1) {
984      Diag(clang::diag::err_drv_output_argument_with_multiple_files);
985      FinalOutput = 0;
986    }
987  }
988
989  for (ActionList::const_iterator it = C.getActions().begin(),
990         ie = C.getActions().end(); it != ie; ++it) {
991    Action *A = *it;
992
993    // If we are linking an image for multiple archs then the linker wants
994    // -arch_multiple and -final_output <final image name>. Unfortunately, this
995    // doesn't fit in cleanly because we have to pass this information down.
996    //
997    // FIXME: This is a hack; find a cleaner way to integrate this into the
998    // process.
999    const char *LinkingOutput = 0;
1000    if (isa<LipoJobAction>(A)) {
1001      if (FinalOutput)
1002        LinkingOutput = FinalOutput->getValue(C.getArgs());
1003      else
1004        LinkingOutput = DefaultImageName.c_str();
1005    }
1006
1007    InputInfo II;
1008    BuildJobsForAction(C, A, &C.getDefaultToolChain(),
1009                       /*BoundArch*/0,
1010                       /*AtTopLevel*/ true,
1011                       /*LinkingOutput*/ LinkingOutput,
1012                       II);
1013  }
1014
1015  // If the user passed -Qunused-arguments or there were errors, don't warn
1016  // about any unused arguments.
1017  if (Diags.hasErrorOccurred() ||
1018      C.getArgs().hasArg(options::OPT_Qunused_arguments))
1019    return;
1020
1021  // Claim -### here.
1022  (void) C.getArgs().hasArg(options::OPT__HASH_HASH_HASH);
1023
1024  for (ArgList::const_iterator it = C.getArgs().begin(), ie = C.getArgs().end();
1025       it != ie; ++it) {
1026    Arg *A = *it;
1027
1028    // FIXME: It would be nice to be able to send the argument to the
1029    // Diagnostic, so that extra values, position, and so on could be printed.
1030    if (!A->isClaimed()) {
1031      if (A->getOption().hasNoArgumentUnused())
1032        continue;
1033
1034      // Suppress the warning automatically if this is just a flag, and it is an
1035      // instance of an argument we already claimed.
1036      const Option &Opt = A->getOption();
1037      if (isa<FlagOption>(Opt)) {
1038        bool DuplicateClaimed = false;
1039
1040        for (arg_iterator it = C.getArgs().filtered_begin(&Opt),
1041               ie = C.getArgs().filtered_end(); it != ie; ++it) {
1042          if ((*it)->isClaimed()) {
1043            DuplicateClaimed = true;
1044            break;
1045          }
1046        }
1047
1048        if (DuplicateClaimed)
1049          continue;
1050      }
1051
1052      Diag(clang::diag::warn_drv_unused_argument)
1053        << A->getAsString(C.getArgs());
1054    }
1055  }
1056}
1057
1058static const Tool &SelectToolForJob(Compilation &C, const ToolChain *TC,
1059                                    const JobAction *JA,
1060                                    const ActionList *&Inputs) {
1061  const Tool *ToolForJob = 0;
1062
1063  // See if we should look for a compiler with an integrated assembler. We match
1064  // bottom up, so what we are actually looking for is an assembler job with a
1065  // compiler input.
1066
1067  // FIXME: This doesn't belong here, but ideally we will support static soon
1068  // anyway.
1069  bool HasStatic = (C.getArgs().hasArg(options::OPT_mkernel) ||
1070                    C.getArgs().hasArg(options::OPT_static) ||
1071                    C.getArgs().hasArg(options::OPT_fapple_kext));
1072  bool IsDarwin = TC->getTriple().getOS() == llvm::Triple::Darwin;
1073  bool IsIADefault = TC->IsIntegratedAssemblerDefault() &&
1074    !(HasStatic && IsDarwin);
1075  if (C.getArgs().hasFlag(options::OPT_integrated_as,
1076                         options::OPT_no_integrated_as,
1077                         IsIADefault) &&
1078      !C.getArgs().hasArg(options::OPT_save_temps) &&
1079      isa<AssembleJobAction>(JA) &&
1080      Inputs->size() == 1 && isa<CompileJobAction>(*Inputs->begin())) {
1081    const Tool &Compiler = TC->SelectTool(
1082      C, cast<JobAction>(**Inputs->begin()), (*Inputs)[0]->getInputs());
1083    if (Compiler.hasIntegratedAssembler()) {
1084      Inputs = &(*Inputs)[0]->getInputs();
1085      ToolForJob = &Compiler;
1086    }
1087  }
1088
1089  // Otherwise use the tool for the current job.
1090  if (!ToolForJob)
1091    ToolForJob = &TC->SelectTool(C, *JA, *Inputs);
1092
1093  // See if we should use an integrated preprocessor. We do so when we have
1094  // exactly one input, since this is the only use case we care about
1095  // (irrelevant since we don't support combine yet).
1096  if (Inputs->size() == 1 && isa<PreprocessJobAction>(*Inputs->begin()) &&
1097      !C.getArgs().hasArg(options::OPT_no_integrated_cpp) &&
1098      !C.getArgs().hasArg(options::OPT_traditional_cpp) &&
1099      !C.getArgs().hasArg(options::OPT_save_temps) &&
1100      ToolForJob->hasIntegratedCPP())
1101    Inputs = &(*Inputs)[0]->getInputs();
1102
1103  return *ToolForJob;
1104}
1105
1106void Driver::BuildJobsForAction(Compilation &C,
1107                                const Action *A,
1108                                const ToolChain *TC,
1109                                const char *BoundArch,
1110                                bool AtTopLevel,
1111                                const char *LinkingOutput,
1112                                InputInfo &Result) const {
1113  llvm::PrettyStackTraceString CrashInfo("Building compilation jobs");
1114
1115  if (const InputAction *IA = dyn_cast<InputAction>(A)) {
1116    // FIXME: It would be nice to not claim this here; maybe the old scheme of
1117    // just using Args was better?
1118    const Arg &Input = IA->getInputArg();
1119    Input.claim();
1120    if (Input.getOption().matches(options::OPT_INPUT)) {
1121      const char *Name = Input.getValue(C.getArgs());
1122      Result = InputInfo(Name, A->getType(), Name);
1123    } else
1124      Result = InputInfo(&Input, A->getType(), "");
1125    return;
1126  }
1127
1128  if (const BindArchAction *BAA = dyn_cast<BindArchAction>(A)) {
1129    const ToolChain *TC = &C.getDefaultToolChain();
1130
1131    std::string Arch;
1132    if (BAA->getArchName())
1133      TC = Host->CreateToolChain(C.getArgs(), BAA->getArchName());
1134
1135    BuildJobsForAction(C, *BAA->begin(), TC, BAA->getArchName(),
1136                       AtTopLevel, LinkingOutput, Result);
1137    return;
1138  }
1139
1140  const ActionList *Inputs = &A->getInputs();
1141
1142  const JobAction *JA = cast<JobAction>(A);
1143  const Tool &T = SelectToolForJob(C, TC, JA, Inputs);
1144
1145  // Only use pipes when there is exactly one input.
1146  InputInfoList InputInfos;
1147  for (ActionList::const_iterator it = Inputs->begin(), ie = Inputs->end();
1148       it != ie; ++it) {
1149    // Treat dsymutil sub-jobs as being at the top-level too, they shouldn't get
1150    // temporary output names.
1151    //
1152    // FIXME: Clean this up.
1153    bool SubJobAtTopLevel = false;
1154    if (AtTopLevel && isa<DsymutilJobAction>(A))
1155      SubJobAtTopLevel = true;
1156
1157    InputInfo II;
1158    BuildJobsForAction(C, *it, TC, BoundArch,
1159                       SubJobAtTopLevel, LinkingOutput, II);
1160    InputInfos.push_back(II);
1161  }
1162
1163  // Always use the first input as the base input.
1164  const char *BaseInput = InputInfos[0].getBaseInput();
1165
1166  // ... except dsymutil actions, which use their actual input as the base
1167  // input.
1168  if (JA->getType() == types::TY_dSYM)
1169    BaseInput = InputInfos[0].getFilename();
1170
1171  // Determine the place to write output to, if any.
1172  if (JA->getType() == types::TY_Nothing) {
1173    Result = InputInfo(A->getType(), BaseInput);
1174  } else {
1175    Result = InputInfo(GetNamedOutputPath(C, *JA, BaseInput, AtTopLevel),
1176                       A->getType(), BaseInput);
1177  }
1178
1179  if (CCCPrintBindings) {
1180    llvm::errs() << "# \"" << T.getToolChain().getTripleString() << '"'
1181                 << " - \"" << T.getName() << "\", inputs: [";
1182    for (unsigned i = 0, e = InputInfos.size(); i != e; ++i) {
1183      llvm::errs() << InputInfos[i].getAsString();
1184      if (i + 1 != e)
1185        llvm::errs() << ", ";
1186    }
1187    llvm::errs() << "], output: " << Result.getAsString() << "\n";
1188  } else {
1189    T.ConstructJob(C, *JA, Result, InputInfos,
1190                   C.getArgsForToolChain(TC, BoundArch), LinkingOutput);
1191  }
1192}
1193
1194const char *Driver::GetNamedOutputPath(Compilation &C,
1195                                       const JobAction &JA,
1196                                       const char *BaseInput,
1197                                       bool AtTopLevel) const {
1198  llvm::PrettyStackTraceString CrashInfo("Computing output path");
1199  // Output to a user requested destination?
1200  if (AtTopLevel && !isa<DsymutilJobAction>(JA)) {
1201    if (Arg *FinalOutput = C.getArgs().getLastArg(options::OPT_o))
1202      return C.addResultFile(FinalOutput->getValue(C.getArgs()));
1203  }
1204
1205  // Default to writing to stdout?
1206  if (AtTopLevel && isa<PreprocessJobAction>(JA))
1207    return "-";
1208
1209  // Output to a temporary file?
1210  if (!AtTopLevel && !C.getArgs().hasArg(options::OPT_save_temps)) {
1211    std::string TmpName =
1212      GetTemporaryPath(types::getTypeTempSuffix(JA.getType()));
1213    return C.addTempFile(C.getArgs().MakeArgString(TmpName.c_str()));
1214  }
1215
1216  llvm::SmallString<128> BasePath(BaseInput);
1217  llvm::StringRef BaseName;
1218
1219  // Dsymutil actions should use the full path.
1220  if (isa<DsymutilJobAction>(JA))
1221    BaseName = BasePath;
1222  else
1223    BaseName = llvm::sys::path::filename(BasePath);
1224
1225  // Determine what the derived output name should be.
1226  const char *NamedOutput;
1227  if (JA.getType() == types::TY_Image) {
1228    NamedOutput = DefaultImageName.c_str();
1229  } else {
1230    const char *Suffix = types::getTypeTempSuffix(JA.getType());
1231    assert(Suffix && "All types used for output should have a suffix.");
1232
1233    std::string::size_type End = std::string::npos;
1234    if (!types::appendSuffixForType(JA.getType()))
1235      End = BaseName.rfind('.');
1236    std::string Suffixed(BaseName.substr(0, End));
1237    Suffixed += '.';
1238    Suffixed += Suffix;
1239    NamedOutput = C.getArgs().MakeArgString(Suffixed.c_str());
1240  }
1241
1242  // As an annoying special case, PCH generation doesn't strip the pathname.
1243  if (JA.getType() == types::TY_PCH) {
1244    llvm::sys::path::remove_filename(BasePath);
1245    if (BasePath.empty())
1246      BasePath = NamedOutput;
1247    else
1248      llvm::sys::path::append(BasePath, NamedOutput);
1249    return C.addResultFile(C.getArgs().MakeArgString(BasePath.c_str()));
1250  } else {
1251    return C.addResultFile(NamedOutput);
1252  }
1253}
1254
1255std::string Driver::GetFilePath(const char *Name, const ToolChain &TC) const {
1256  // Respect a limited subset of the '-Bprefix' functionality in GCC by
1257  // attempting to use this prefix when lokup up program paths.
1258  for (Driver::prefix_list::const_iterator it = PrefixDirs.begin(),
1259       ie = PrefixDirs.end(); it != ie; ++it) {
1260    std::string Dir(*it);
1261    if (Dir.empty())
1262      continue;
1263    if (Dir[0] == '=')
1264      Dir = SysRoot + Dir.substr(1);
1265    llvm::sys::Path P(Dir);
1266    P.appendComponent(Name);
1267    bool Exists;
1268    if (!llvm::sys::fs::exists(P.str(), Exists) && Exists)
1269      return P.str();
1270  }
1271
1272  const ToolChain::path_list &List = TC.getFilePaths();
1273  for (ToolChain::path_list::const_iterator
1274         it = List.begin(), ie = List.end(); it != ie; ++it) {
1275    std::string Dir(*it);
1276    if (Dir.empty())
1277      continue;
1278    if (Dir[0] == '=')
1279      Dir = SysRoot + Dir.substr(1);
1280    llvm::sys::Path P(Dir);
1281    P.appendComponent(Name);
1282    bool Exists;
1283    if (!llvm::sys::fs::exists(P.str(), Exists) && Exists)
1284      return P.str();
1285  }
1286
1287  return Name;
1288}
1289
1290std::string Driver::GetProgramPath(const char *Name, const ToolChain &TC,
1291                                   bool WantFile) const {
1292  // Respect a limited subset of the '-Bprefix' functionality in GCC by
1293  // attempting to use this prefix when lokup up program paths.
1294  for (Driver::prefix_list::const_iterator it = PrefixDirs.begin(),
1295       ie = PrefixDirs.end(); it != ie; ++it) {
1296    llvm::sys::Path P(*it);
1297    P.appendComponent(Name);
1298    bool Exists;
1299    if (WantFile ? !llvm::sys::fs::exists(P.str(), Exists) && Exists
1300                 : P.canExecute())
1301      return P.str();
1302  }
1303
1304  const ToolChain::path_list &List = TC.getProgramPaths();
1305  for (ToolChain::path_list::const_iterator
1306         it = List.begin(), ie = List.end(); it != ie; ++it) {
1307    llvm::sys::Path P(*it);
1308    P.appendComponent(Name);
1309    bool Exists;
1310    if (WantFile ? !llvm::sys::fs::exists(P.str(), Exists) && Exists
1311                 : P.canExecute())
1312      return P.str();
1313  }
1314
1315  // If all else failed, search the path.
1316  llvm::sys::Path P(llvm::sys::Program::FindProgramByName(Name));
1317  if (!P.empty())
1318    return P.str();
1319
1320  return Name;
1321}
1322
1323std::string Driver::GetTemporaryPath(const char *Suffix) const {
1324  // FIXME: This is lame; sys::Path should provide this function (in particular,
1325  // it should know how to find the temporary files dir).
1326  std::string Error;
1327  const char *TmpDir = ::getenv("TMPDIR");
1328  if (!TmpDir)
1329    TmpDir = ::getenv("TEMP");
1330  if (!TmpDir)
1331    TmpDir = ::getenv("TMP");
1332  if (!TmpDir)
1333    TmpDir = "/tmp";
1334  llvm::sys::Path P(TmpDir);
1335  P.appendComponent("cc");
1336  if (P.makeUnique(false, &Error)) {
1337    Diag(clang::diag::err_drv_unable_to_make_temp) << Error;
1338    return "";
1339  }
1340
1341  // FIXME: Grumble, makeUnique sometimes leaves the file around!?  PR3837.
1342  P.eraseFromDisk(false, 0);
1343
1344  P.appendSuffix(Suffix);
1345  return P.str();
1346}
1347
1348const HostInfo *Driver::GetHostInfo(const char *TripleStr) const {
1349  llvm::PrettyStackTraceString CrashInfo("Constructing host");
1350  llvm::Triple Triple(llvm::Triple::normalize(TripleStr).c_str());
1351
1352  // TCE is an osless target
1353  if (Triple.getArchName() == "tce")
1354    return createTCEHostInfo(*this, Triple);
1355
1356  switch (Triple.getOS()) {
1357  case llvm::Triple::AuroraUX:
1358    return createAuroraUXHostInfo(*this, Triple);
1359  case llvm::Triple::Darwin:
1360    return createDarwinHostInfo(*this, Triple);
1361  case llvm::Triple::DragonFly:
1362    return createDragonFlyHostInfo(*this, Triple);
1363  case llvm::Triple::OpenBSD:
1364    return createOpenBSDHostInfo(*this, Triple);
1365  case llvm::Triple::NetBSD:
1366    return createNetBSDHostInfo(*this, Triple);
1367  case llvm::Triple::FreeBSD:
1368    return createFreeBSDHostInfo(*this, Triple);
1369  case llvm::Triple::Minix:
1370    return createMinixHostInfo(*this, Triple);
1371  case llvm::Triple::Linux:
1372    return createLinuxHostInfo(*this, Triple);
1373  case llvm::Triple::Win32:
1374    return createWindowsHostInfo(*this, Triple);
1375  case llvm::Triple::MinGW32:
1376    return createMinGWHostInfo(*this, Triple);
1377  default:
1378    return createUnknownHostInfo(*this, Triple);
1379  }
1380}
1381
1382bool Driver::ShouldUseClangCompiler(const Compilation &C, const JobAction &JA,
1383                                    const llvm::Triple &Triple) const {
1384  // Check if user requested no clang, or clang doesn't understand this type (we
1385  // only handle single inputs for now).
1386  if (!CCCUseClang || JA.size() != 1 ||
1387      !types::isAcceptedByClang((*JA.begin())->getType()))
1388    return false;
1389
1390  // Otherwise make sure this is an action clang understands.
1391  if (isa<PreprocessJobAction>(JA)) {
1392    if (!CCCUseClangCPP) {
1393      Diag(clang::diag::warn_drv_not_using_clang_cpp);
1394      return false;
1395    }
1396  } else if (!isa<PrecompileJobAction>(JA) && !isa<CompileJobAction>(JA))
1397    return false;
1398
1399  // Use clang for C++?
1400  if (!CCCUseClangCXX && types::isCXX((*JA.begin())->getType())) {
1401    Diag(clang::diag::warn_drv_not_using_clang_cxx);
1402    return false;
1403  }
1404
1405  // Always use clang for precompiling, AST generation, and rewriting,
1406  // regardless of archs.
1407  if (isa<PrecompileJobAction>(JA) ||
1408      types::isOnlyAcceptedByClang(JA.getType()))
1409    return true;
1410
1411  // Finally, don't use clang if this isn't one of the user specified archs to
1412  // build.
1413  if (!CCCClangArchs.empty() && !CCCClangArchs.count(Triple.getArch())) {
1414    Diag(clang::diag::warn_drv_not_using_clang_arch) << Triple.getArchName();
1415    return false;
1416  }
1417
1418  return true;
1419}
1420
1421/// GetReleaseVersion - Parse (([0-9]+)(.([0-9]+)(.([0-9]+)?))?)? and return the
1422/// grouped values as integers. Numbers which are not provided are set to 0.
1423///
1424/// \return True if the entire string was parsed (9.2), or all groups were
1425/// parsed (10.3.5extrastuff).
1426bool Driver::GetReleaseVersion(const char *Str, unsigned &Major,
1427                               unsigned &Minor, unsigned &Micro,
1428                               bool &HadExtra) {
1429  HadExtra = false;
1430
1431  Major = Minor = Micro = 0;
1432  if (*Str == '\0')
1433    return true;
1434
1435  char *End;
1436  Major = (unsigned) strtol(Str, &End, 10);
1437  if (*Str != '\0' && *End == '\0')
1438    return true;
1439  if (*End != '.')
1440    return false;
1441
1442  Str = End+1;
1443  Minor = (unsigned) strtol(Str, &End, 10);
1444  if (*Str != '\0' && *End == '\0')
1445    return true;
1446  if (*End != '.')
1447    return false;
1448
1449  Str = End+1;
1450  Micro = (unsigned) strtol(Str, &End, 10);
1451  if (*Str != '\0' && *End == '\0')
1452    return true;
1453  if (Str == End)
1454    return false;
1455  HadExtra = true;
1456  return true;
1457}
1458