1 files changed, 1184 insertions, 0 deletions
diff --git a/lib/Support/CommandLine.cpp b/lib/Support/CommandLine.cpp
new file mode 100644
index 0000000..4922560
--- /dev/null
+++ b/lib/Support/CommandLine.cpp
@@ -0,0 +1,1184 @@
+//===-- CommandLine.cpp - Command line parser implementation --------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This class implements a command line argument processor that is useful when
+// creating a tool.  It provides a simple, minimalistic interface that is easily
+// extensible and supports nonlocal (library) command line options.
+//
+// Note that rather than trying to figure out what this code does, you could try
+// reading the library documentation located in docs/CommandLine.html
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Config/config.h"
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/Streams.h"
+#include "llvm/System/Path.h"
+#include <algorithm>
+#include <functional>
+#include <map>
+#include <ostream>
+#include <set>
+#include <cstdlib>
+#include <cerrno>
+#include <cstring>
+#include <climits>
+using namespace llvm;
+using namespace cl;
+
+//===----------------------------------------------------------------------===//
+// Template instantiations and anchors.
+//
+TEMPLATE_INSTANTIATION(class basic_parser<bool>);
+TEMPLATE_INSTANTIATION(class basic_parser<boolOrDefault>);
+TEMPLATE_INSTANTIATION(class basic_parser<int>);
+TEMPLATE_INSTANTIATION(class basic_parser<unsigned>);
+TEMPLATE_INSTANTIATION(class basic_parser<double>);
+TEMPLATE_INSTANTIATION(class basic_parser<float>);
+TEMPLATE_INSTANTIATION(class basic_parser<std::string>);
+TEMPLATE_INSTANTIATION(class basic_parser<char>);
+
+TEMPLATE_INSTANTIATION(class opt<unsigned>);
+TEMPLATE_INSTANTIATION(class opt<int>);
+TEMPLATE_INSTANTIATION(class opt<std::string>);
+TEMPLATE_INSTANTIATION(class opt<char>);
+TEMPLATE_INSTANTIATION(class opt<bool>);
+
+void Option::anchor() {}
+void basic_parser_impl::anchor() {}
+void parser<bool>::anchor() {}
+void parser<boolOrDefault>::anchor() {}
+void parser<int>::anchor() {}
+void parser<unsigned>::anchor() {}
+void parser<double>::anchor() {}
+void parser<float>::anchor() {}
+void parser<std::string>::anchor() {}
+void parser<char>::anchor() {}
+
+//===----------------------------------------------------------------------===//
+
+// Globals for name and overview of program.  Program name is not a string to
+// avoid static ctor/dtor issues.
+static char ProgramName[80] = "<premain>";
+static const char *ProgramOverview = 0;
+
+// This collects additional help to be printed.
+static ManagedStatic<std::vector<const char*> > MoreHelp;
+
+extrahelp::extrahelp(const char *Help)
+  : morehelp(Help) {
+  MoreHelp->push_back(Help);
+}
+
+static bool OptionListChanged = false;
+
+// MarkOptionsChanged - Internal helper function.
+void cl::MarkOptionsChanged() {
+  OptionListChanged = true;
+}
+
+/// RegisteredOptionList - This is the list of the command line options that
+/// have statically constructed themselves.
+static Option *RegisteredOptionList = 0;
+
+void Option::addArgument() {
+  assert(NextRegistered == 0 && "argument multiply registered!");
+
+  NextRegistered = RegisteredOptionList;
+  RegisteredOptionList = this;
+  MarkOptionsChanged();
+}
+
+
+//===----------------------------------------------------------------------===//
+// Basic, shared command line option processing machinery.
+//
+
+/// GetOptionInfo - Scan the list of registered options, turning them into data
+/// structures that are easier to handle.
+static void GetOptionInfo(std::vector<Option*> &PositionalOpts,
+                          std::vector<Option*> &SinkOpts,
+                          std::map<std::string, Option*> &OptionsMap) {
+  std::vector<const char*> OptionNames;
+  Option *CAOpt = 0;  // The ConsumeAfter option if it exists.
+  for (Option *O = RegisteredOptionList; O; O = O->getNextRegisteredOption()) {
+    // If this option wants to handle multiple option names, get the full set.
+    // This handles enum options like "-O1 -O2" etc.
+    O->getExtraOptionNames(OptionNames);
+    if (O->ArgStr[0])
+      OptionNames.push_back(O->ArgStr);
+
+    // Handle named options.
+    for (size_t i = 0, e = OptionNames.size(); i != e; ++i) {
+      // Add argument to the argument map!
+      if (!OptionsMap.insert(std::pair<std::string,Option*>(OptionNames[i],
+                                                            O)).second) {
+        cerr << ProgramName << ": CommandLine Error: Argument '"
+             << OptionNames[i] << "' defined more than once!\n";
+      }
+    }
+
+    OptionNames.clear();
+
+    // Remember information about positional options.
+    if (O->getFormattingFlag() == cl::Positional)
+      PositionalOpts.push_back(O);
+    else if (O->getMiscFlags() & cl::Sink) // Remember sink options
+      SinkOpts.push_back(O);
+    else if (O->getNumOccurrencesFlag() == cl::ConsumeAfter) {
+      if (CAOpt)
+        O->error("Cannot specify more than one option with cl::ConsumeAfter!");
+      CAOpt = O;
+    }
+  }
+
+  if (CAOpt)
+    PositionalOpts.push_back(CAOpt);
+
+  // Make sure that they are in order of registration not backwards.
+  std::reverse(PositionalOpts.begin(), PositionalOpts.end());
+}
+
+
+/// LookupOption - Lookup the option specified by the specified option on the
+/// command line.  If there is a value specified (after an equal sign) return
+/// that as well.
+static Option *LookupOption(const char *&Arg, const char *&Value,
+                            std::map<std::string, Option*> &OptionsMap) {
+  while (*Arg == '-') ++Arg;  // Eat leading dashes
+
+  const char *ArgEnd = Arg;
+  while (*ArgEnd && *ArgEnd != '=')
+    ++ArgEnd; // Scan till end of argument name.
+
+  if (*ArgEnd == '=')  // If we have an equals sign...
+    Value = ArgEnd+1;  // Get the value, not the equals
+
+
+  if (*Arg == 0) return 0;
+
+  // Look up the option.
+  std::map<std::string, Option*>::iterator I =
+    OptionsMap.find(std::string(Arg, ArgEnd));
+  return I != OptionsMap.end() ? I->second : 0;
+}
+
+static inline bool ProvideOption(Option *Handler, const char *ArgName,
+                                 const char *Value, int argc, char **argv,
+                                 int &i) {
+  // Is this a multi-argument option?
+  unsigned NumAdditionalVals = Handler->getNumAdditionalVals();
+
+  // Enforce value requirements
+  switch (Handler->getValueExpectedFlag()) {
+  case ValueRequired:
+    if (Value == 0) {       // No value specified?
+      if (i+1 < argc) {     // Steal the next argument, like for '-o filename'
+        Value = argv[++i];
+      } else {
+        return Handler->error(" requires a value!");
+      }
+    }
+    break;
+  case ValueDisallowed:
+    if (NumAdditionalVals > 0)
+      return Handler->error(": multi-valued option specified"
+      " with ValueDisallowed modifier!");
+
+    if (Value)
+      return Handler->error(" does not allow a value! '" +
+                            std::string(Value) + "' specified.");
+    break;
+  case ValueOptional:
+    break;
+  default:
+    cerr << ProgramName
+         << ": Bad ValueMask flag! CommandLine usage error:"
+         << Handler->getValueExpectedFlag() << "\n";
+    abort();
+    break;
+  }
+
+  // If this isn't a multi-arg option, just run the handler.
+  if (NumAdditionalVals == 0) {
+    return Handler->addOccurrence(i, ArgName, Value ? Value : "");
+  }
+  // If it is, run the handle several times.
+  else {
+    bool MultiArg = false;
+
+    if (Value) {
+      if (Handler->addOccurrence(i, ArgName, Value, MultiArg))
+        return true;
+      --NumAdditionalVals;
+      MultiArg = true;
+    }
+
+    while (NumAdditionalVals > 0) {
+
+      if (i+1 < argc) {
+        Value = argv[++i];
+      } else {
+        return Handler->error(": not enough values!");
+      }
+      if (Handler->addOccurrence(i, ArgName, Value, MultiArg))
+        return true;
+      MultiArg = true;
+      --NumAdditionalVals;
+    }
+    return false;
+  }
+}
+
+static bool ProvidePositionalOption(Option *Handler, const std::string &Arg,
+                                    int i) {
+  int Dummy = i;
+  return ProvideOption(Handler, Handler->ArgStr, Arg.c_str(), 0, 0, Dummy);
+}
+
+
+// Option predicates...
+static inline bool isGrouping(const Option *O) {
+  return O->getFormattingFlag() == cl::Grouping;
+}
+static inline bool isPrefixedOrGrouping(const Option *O) {
+  return isGrouping(O) || O->getFormattingFlag() == cl::Prefix;
+}
+
+// getOptionPred - Check to see if there are any options that satisfy the
+// specified predicate with names that are the prefixes in Name.  This is
+// checked by progressively stripping characters off of the name, checking to
+// see if there options that satisfy the predicate.  If we find one, return it,
+// otherwise return null.
+//
+static Option *getOptionPred(std::string Name, size_t &Length,
+                             bool (*Pred)(const Option*),
+                             std::map<std::string, Option*> &OptionsMap) {
+
+  std::map<std::string, Option*>::iterator OMI = OptionsMap.find(Name);
+  if (OMI != OptionsMap.end() && Pred(OMI->second)) {
+    Length = Name.length();
+    return OMI->second;
+  }
+
+  if (Name.size() == 1) return 0;
+  do {
+    Name.erase(Name.end()-1, Name.end());   // Chop off the last character...
+    OMI = OptionsMap.find(Name);
+
+    // Loop while we haven't found an option and Name still has at least two
+    // characters in it (so that the next iteration will not be the empty
+    // string...
+  } while ((OMI == OptionsMap.end() || !Pred(OMI->second)) && Name.size() > 1);
+
+  if (OMI != OptionsMap.end() && Pred(OMI->second)) {
+    Length = Name.length();
+    return OMI->second;    // Found one!
+  }
+  return 0;                // No option found!
+}
+
+static bool RequiresValue(const Option *O) {
+  return O->getNumOccurrencesFlag() == cl::Required ||
+         O->getNumOccurrencesFlag() == cl::OneOrMore;
+}
+
+static bool EatsUnboundedNumberOfValues(const Option *O) {
+  return O->getNumOccurrencesFlag() == cl::ZeroOrMore ||
+         O->getNumOccurrencesFlag() == cl::OneOrMore;
+}
+
+/// ParseCStringVector - Break INPUT up wherever one or more
+/// whitespace characters are found, and store the resulting tokens in
+/// OUTPUT. The tokens stored in OUTPUT are dynamically allocated
+/// using strdup (), so it is the caller's responsibility to free ()
+/// them later.
+///
+static void ParseCStringVector(std::vector<char *> &output,
+                               const char *input) {
+  // Characters which will be treated as token separators:
+  static const char *const delims = " \v\f\t\r\n";
+
+  std::string work (input);
+  // Skip past any delims at head of input string.
+  size_t pos = work.find_first_not_of (delims);
+  // If the string consists entirely of delims, then exit early.
+  if (pos == std::string::npos) return;
+  // Otherwise, jump forward to beginning of first word.
+  work = work.substr (pos);
+  // Find position of first delimiter.
+  pos = work.find_first_of (delims);
+
+  while (!work.empty() && pos != std::string::npos) {
+    // Everything from 0 to POS is the next word to copy.
+    output.push_back (strdup (work.substr (0,pos).c_str ()));
+    // Is there another word in the string?
+    size_t nextpos = work.find_first_not_of (delims, pos + 1);
+    if (nextpos != std::string::npos) {
+      // Yes? Then remove delims from beginning ...
+      work = work.substr (work.find_first_not_of (delims, pos + 1));
+      // and find the end of the word.
+      pos = work.find_first_of (delims);
+    } else {
+      // No? (Remainder of string is delims.) End the loop.
+      work = "";
+      pos = std::string::npos;
+    }
+  }
+
+  // If `input' ended with non-delim char, then we'll get here with
+  // the last word of `input' in `work'; copy it now.
+  if (!work.empty ()) {
+    output.push_back (strdup (work.c_str ()));
+  }
+}
+
+/// ParseEnvironmentOptions - An alternative entry point to the
+/// CommandLine library, which allows you to read the program's name
+/// from the caller (as PROGNAME) and its command-line arguments from
+/// an environment variable (whose name is given in ENVVAR).
+///
+void cl::ParseEnvironmentOptions(const char *progName, const char *envVar,
+                                 const char *Overview, bool ReadResponseFiles) {
+  // Check args.
+  assert(progName && "Program name not specified");
+  assert(envVar && "Environment variable name missing");
+
+  // Get the environment variable they want us to parse options out of.
+  const char *envValue = getenv(envVar);
+  if (!envValue)
+    return;
+
+  // Get program's "name", which we wouldn't know without the caller
+  // telling us.
+  std::vector<char*> newArgv;
+  newArgv.push_back(strdup(progName));
+
+  // Parse the value of the environment variable into a "command line"
+  // and hand it off to ParseCommandLineOptions().
+  ParseCStringVector(newArgv, envValue);
+  int newArgc = static_cast<int>(newArgv.size());
+  ParseCommandLineOptions(newArgc, &newArgv[0], Overview, ReadResponseFiles);
+
+  // Free all the strdup()ed strings.
+  for (std::vector<char*>::iterator i = newArgv.begin(), e = newArgv.end();
+       i != e; ++i)
+    free (*i);
+}
+
+
+/// ExpandResponseFiles - Copy the contents of argv into newArgv,
+/// substituting the contents of the response files for the arguments
+/// of type @file.
+static void ExpandResponseFiles(int argc, char** argv,
+                                std::vector<char*>& newArgv) {
+  for (int i = 1; i != argc; ++i) {
+    char* arg = argv[i];
+
+    if (arg[0] == '@') {
+
+      sys::PathWithStatus respFile(++arg);
+
+      // Check that the response file is not empty (mmap'ing empty
+      // files can be problematic).
+      const sys::FileStatus *FileStat = respFile.getFileStatus();
+      if (FileStat && FileStat->getSize() != 0) {
+
+        // Mmap the response file into memory.
+        OwningPtr<MemoryBuffer>
+          respFilePtr(MemoryBuffer::getFile(respFile.c_str()));
+
+        // If we could open the file, parse its contents, otherwise
+        // pass the @file option verbatim.
+
+        // TODO: we should also support recursive loading of response files,
+        // since this is how gcc behaves. (From their man page: "The file may
+        // itself contain additional @file options; any such options will be
+        // processed recursively.")
+
+        if (respFilePtr != 0) {
+          ParseCStringVector(newArgv, respFilePtr->getBufferStart());
+          continue;
+        }
+      }
+    }
+    newArgv.push_back(strdup(arg));
+  }
+}
+
+void cl::ParseCommandLineOptions(int argc, char **argv,
+                                 const char *Overview, bool ReadResponseFiles) {
+  // Process all registered options.
+  std::vector<Option*> PositionalOpts;
+  std::vector<Option*> SinkOpts;
+  std::map<std::string, Option*> Opts;
+  GetOptionInfo(PositionalOpts, SinkOpts, Opts);
+
+  assert((!Opts.empty() || !PositionalOpts.empty()) &&
+         "No options specified!");
+
+  // Expand response files.
+  std::vector<char*> newArgv;
+  if (ReadResponseFiles) {
+    newArgv.push_back(strdup(argv[0]));
+    ExpandResponseFiles(argc, argv, newArgv);
+    argv = &newArgv[0];
+    argc = static_cast<int>(newArgv.size());
+  }
+
+  // Copy the program name into ProgName, making sure not to overflow it.
+  std::string ProgName = sys::Path(argv[0]).getLast();
+  if (ProgName.size() > 79) ProgName.resize(79);
+  strcpy(ProgramName, ProgName.c_str());
+
+  ProgramOverview = Overview;
+  bool ErrorParsing = false;
+
+  // Check out the positional arguments to collect information about them.
+  unsigned NumPositionalRequired = 0;
+
+  // Determine whether or not there are an unlimited number of positionals
+  bool HasUnlimitedPositionals = false;
+
+  Option *ConsumeAfterOpt = 0;
+  if (!PositionalOpts.empty()) {
+    if (PositionalOpts[0]->getNumOccurrencesFlag() == cl::ConsumeAfter) {
+      assert(PositionalOpts.size() > 1 &&
+             "Cannot specify cl::ConsumeAfter without a positional argument!");
+      ConsumeAfterOpt = PositionalOpts[0];
+    }
+
+    // Calculate how many positional values are _required_.
+    bool UnboundedFound = false;
+    for (size_t i = ConsumeAfterOpt != 0, e = PositionalOpts.size();
+         i != e; ++i) {
+      Option *Opt = PositionalOpts[i];
+      if (RequiresValue(Opt))
+        ++NumPositionalRequired;
+      else if (ConsumeAfterOpt) {
+        // ConsumeAfter cannot be combined with "optional" positional options
+        // unless there is only one positional argument...
+        if (PositionalOpts.size() > 2)
+          ErrorParsing |=
+            Opt->error(" error - this positional option will never be matched, "
+                       "because it does not Require a value, and a "
+                       "cl::ConsumeAfter option is active!");
+      } else if (UnboundedFound && !Opt->ArgStr[0]) {
+        // This option does not "require" a value...  Make sure this option is
+        // not specified after an option that eats all extra arguments, or this
+        // one will never get any!
+        //
+        ErrorParsing |= Opt->error(" error - option can never match, because "
+                                   "another positional argument will match an "
+                                   "unbounded number of values, and this option"
+                                   " does not require a value!");
+      }
+      UnboundedFound |= EatsUnboundedNumberOfValues(Opt);
+    }
+    HasUnlimitedPositionals = UnboundedFound || ConsumeAfterOpt;
+  }
+
+  // PositionalVals - A vector of "positional" arguments we accumulate into
+  // the process at the end...
+  //
+  std::vector<std::pair<std::string,unsigned> > PositionalVals;
+
+  // If the program has named positional arguments, and the name has been run
+  // across, keep track of which positional argument was named.  Otherwise put
+  // the positional args into the PositionalVals list...
+  Option *ActivePositionalArg = 0;
+
+  // Loop over all of the arguments... processing them.
+  bool DashDashFound = false;  // Have we read '--'?
+  for (int i = 1; i < argc; ++i) {
+    Option *Handler = 0;
+    const char *Value = 0;
+    const char *ArgName = "";
+
+    // If the option list changed, this means that some command line
+    // option has just been registered or deregistered.  This can occur in
+    // response to things like -load, etc.  If this happens, rescan the options.
+    if (OptionListChanged) {
+      PositionalOpts.clear();
+      SinkOpts.clear();
+      Opts.clear();
+      GetOptionInfo(PositionalOpts, SinkOpts, Opts);
+      OptionListChanged = false;
+    }
+
+    // Check to see if this is a positional argument.  This argument is
+    // considered to be positional if it doesn't start with '-', if it is "-"
+    // itself, or if we have seen "--" already.
+    //
+    if (argv[i][0] != '-' || argv[i][1] == 0 || DashDashFound) {
+      // Positional argument!
+      if (ActivePositionalArg) {
+        ProvidePositionalOption(ActivePositionalArg, argv[i], i);
+        continue;  // We are done!
+      } else if (!PositionalOpts.empty()) {
+        PositionalVals.push_back(std::make_pair(argv[i],i));
+
+        // All of the positional arguments have been fulfulled, give the rest to
+        // the consume after option... if it's specified...
+        //
+        if (PositionalVals.size() >= NumPositionalRequired &&
+            ConsumeAfterOpt != 0) {
+          for (++i; i < argc; ++i)
+            PositionalVals.push_back(std::make_pair(argv[i],i));
+          break;   // Handle outside of the argument processing loop...
+        }
+
+        // Delay processing positional arguments until the end...
+        continue;
+      }
+    } else if (argv[i][0] == '-' && argv[i][1] == '-' && argv[i][2] == 0 &&
+               !DashDashFound) {
+      DashDashFound = true;  // This is the mythical "--"?
+      continue;              // Don't try to process it as an argument itself.
+    } else if (ActivePositionalArg &&
+               (ActivePositionalArg->getMiscFlags() & PositionalEatsArgs)) {
+      // If there is a positional argument eating options, check to see if this
+      // option is another positional argument.  If so, treat it as an argument,
+      // otherwise feed it to the eating positional.
+      ArgName = argv[i]+1;
+      Handler = LookupOption(ArgName, Value, Opts);
+      if (!Handler || Handler->getFormattingFlag() != cl::Positional) {
+        ProvidePositionalOption(ActivePositionalArg, argv[i], i);
+        continue;  // We are done!
+      }
+
+    } else {     // We start with a '-', must be an argument...
+      ArgName = argv[i]+1;
+      Handler = LookupOption(ArgName, Value, Opts);
+
+      // Check to see if this "option" is really a prefixed or grouped argument.
+      if (Handler == 0) {
+        std::string RealName(ArgName);
+        if (RealName.size() > 1) {
+          size_t Length = 0;
+          Option *PGOpt = getOptionPred(RealName, Length, isPrefixedOrGrouping,
+                                        Opts);
+
+          // If the option is a prefixed option, then the value is simply the
+          // rest of the name...  so fall through to later processing, by
+          // setting up the argument name flags and value fields.
+          //
+          if (PGOpt && PGOpt->getFormattingFlag() == cl::Prefix) {
+            Value = ArgName+Length;
+            assert(Opts.find(std::string(ArgName, Value)) != Opts.end() &&
+                   Opts.find(std::string(ArgName, Value))->second == PGOpt);
+            Handler = PGOpt;
+          } else if (PGOpt) {
+            // This must be a grouped option... handle them now.
+            assert(isGrouping(PGOpt) && "Broken getOptionPred!");
+
+            do {
+              // Move current arg name out of RealName into RealArgName...
+              std::string RealArgName(RealName.begin(),
+                                      RealName.begin() + Length);
+              RealName.erase(RealName.begin(), RealName.begin() + Length);
+
+              // Because ValueRequired is an invalid flag for grouped arguments,
+              // we don't need to pass argc/argv in...
+              //
+              assert(PGOpt->getValueExpectedFlag() != cl::ValueRequired &&
+                     "Option can not be cl::Grouping AND cl::ValueRequired!");
+              int Dummy;
+              ErrorParsing |= ProvideOption(PGOpt, RealArgName.c_str(),
+                                            0, 0, 0, Dummy);
+
+              // Get the next grouping option...
+              PGOpt = getOptionPred(RealName, Length, isGrouping, Opts);
+            } while (PGOpt && Length != RealName.size());
+
+            Handler = PGOpt; // Ate all of the options.
+          }
+        }
+      }
+    }
+
+    if (Handler == 0) {
+      if (SinkOpts.empty()) {
+        cerr << ProgramName << ": Unknown command line argument '"
+             << argv[i] << "'.  Try: '" << argv[0] << " --help'\n";
+        ErrorParsing = true;
+      } else {
+        for (std::vector<Option*>::iterator I = SinkOpts.begin(),
+               E = SinkOpts.end(); I != E ; ++I)
+          (*I)->addOccurrence(i, "", argv[i]);
+      }
+      continue;
+    }
+
+    // Check to see if this option accepts a comma separated list of values.  If
+    // it does, we have to split up the value into multiple values...
+    if (Value && Handler->getMiscFlags() & CommaSeparated) {
+      std::string Val(Value);
+      std::string::size_type Pos = Val.find(',');
+
+      while (Pos != std::string::npos) {
+        // Process the portion before the comma...
+        ErrorParsing |= ProvideOption(Handler, ArgName,
+                                      std::string(Val.begin(),
+                                                  Val.begin()+Pos).c_str(),
+                                      argc, argv, i);
+        // Erase the portion before the comma, AND the comma...
+        Val.erase(Val.begin(), Val.begin()+Pos+1);
+        Value += Pos+1;  // Increment the original value pointer as well...
+
+        // Check for another comma...
+        Pos = Val.find(',');
+      }
+    }
+
+    // If this is a named positional argument, just remember that it is the
+    // active one...
+    if (Handler->getFormattingFlag() == cl::Positional)
+      ActivePositionalArg = Handler;
+    else
+      ErrorParsing |= ProvideOption(Handler, ArgName, Value, argc, argv, i);
+  }
+
+  // Check and handle positional arguments now...
+  if (NumPositionalRequired > PositionalVals.size()) {
+    cerr << ProgramName
+         << ": Not enough positional command line arguments specified!\n"
+         << "Must specify at least " << NumPositionalRequired
+         << " positional arguments: See: " << argv[0] << " --help\n";
+
+    ErrorParsing = true;
+  } else if (!HasUnlimitedPositionals
+             && PositionalVals.size() > PositionalOpts.size()) {
+    cerr << ProgramName
+         << ": Too many positional arguments specified!\n"
+         << "Can specify at most " << PositionalOpts.size()
+         << " positional arguments: See: " << argv[0] << " --help\n";
+    ErrorParsing = true;
+
+  } else if (ConsumeAfterOpt == 0) {
+    // Positional args have already been handled if ConsumeAfter is specified...
+    unsigned ValNo = 0, NumVals = static_cast<unsigned>(PositionalVals.size());
+    for (size_t i = 0, e = PositionalOpts.size(); i != e; ++i) {
+      if (RequiresValue(PositionalOpts[i])) {
+        ProvidePositionalOption(PositionalOpts[i], PositionalVals[ValNo].first,
+                                PositionalVals[ValNo].second);
+        ValNo++;
+        --NumPositionalRequired;  // We fulfilled our duty...
+      }
+
+      // If we _can_ give this option more arguments, do so now, as long as we
+      // do not give it values that others need.  'Done' controls whether the
+      // option even _WANTS_ any more.
+      //
+      bool Done = PositionalOpts[i]->getNumOccurrencesFlag() == cl::Required;
+      while (NumVals-ValNo > NumPositionalRequired && !Done) {
+        switch (PositionalOpts[i]->getNumOccurrencesFlag()) {
+        case cl::Optional:
+          Done = true;          // Optional arguments want _at most_ one value
+          // FALL THROUGH
+        case cl::ZeroOrMore:    // Zero or more will take all they can get...
+        case cl::OneOrMore:     // One or more will take all they can get...
+          ProvidePositionalOption(PositionalOpts[i],
+                                  PositionalVals[ValNo].first,
+                                  PositionalVals[ValNo].second);
+          ValNo++;
+          break;
+        default:
+          assert(0 && "Internal error, unexpected NumOccurrences flag in "
+                 "positional argument processing!");
+        }
+      }
+    }
+  } else {
+    assert(ConsumeAfterOpt && NumPositionalRequired <= PositionalVals.size());
+    unsigned ValNo = 0;
+    for (size_t j = 1, e = PositionalOpts.size(); j != e; ++j)
+      if (RequiresValue(PositionalOpts[j])) {
+        ErrorParsing |= ProvidePositionalOption(PositionalOpts[j],
+                                                PositionalVals[ValNo].first,
+                                                PositionalVals[ValNo].second);
+        ValNo++;
+      }
+
+    // Handle the case where there is just one positional option, and it's
+    // optional.  In this case, we want to give JUST THE FIRST option to the
+    // positional option and keep the rest for the consume after.  The above
+    // loop would have assigned no values to positional options in this case.
+    //
+    if (PositionalOpts.size() == 2 && ValNo == 0 && !PositionalVals.empty()) {
+      ErrorParsing |= ProvidePositionalOption(PositionalOpts[1],
+                                              PositionalVals[ValNo].first,
+                                              PositionalVals[ValNo].second);
+      ValNo++;
+    }
+
+    // Handle over all of the rest of the arguments to the
+    // cl::ConsumeAfter command line option...
+    for (; ValNo != PositionalVals.size(); ++ValNo)
+      ErrorParsing |= ProvidePositionalOption(ConsumeAfterOpt,
+                                              PositionalVals[ValNo].first,
+                                              PositionalVals[ValNo].second);
+  }
+
+  // Loop over args and make sure all required args are specified!
+  for (std::map<std::string, Option*>::iterator I = Opts.begin(),
+         E = Opts.end(); I != E; ++I) {
+    switch (I->second->getNumOccurrencesFlag()) {
+    case Required:
+    case OneOrMore:
+      if (I->second->getNumOccurrences() == 0) {
+        I->second->error(" must be specified at least once!");
+        ErrorParsing = true;
+      }
+      // Fall through
+    default:
+      break;
+    }
+  }
+
+  // Free all of the memory allocated to the map.  Command line options may only
+  // be processed once!
+  Opts.clear();
+  PositionalOpts.clear();
+  MoreHelp->clear();
+
+  // Free the memory allocated by ExpandResponseFiles.
+  if (ReadResponseFiles) {
+    // Free all the strdup()ed strings.
+    for (std::vector<char*>::iterator i = newArgv.begin(), e = newArgv.end();
+         i != e; ++i)
+      free (*i);
+  }
+
+  // If we had an error processing our arguments, don't let the program execute
+  if (ErrorParsing) exit(1);
+}
+
+//===----------------------------------------------------------------------===//
+// Option Base class implementation
+//
+
+bool Option::error(std::string Message, const char *ArgName) {
+  if (ArgName == 0) ArgName = ArgStr;
+  if (ArgName[0] == 0)
+    cerr << HelpStr;  // Be nice for positional arguments
+  else
+    cerr << ProgramName << ": for the -" << ArgName;
+
+  cerr << " option: " << Message << "\n";
+  return true;
+}
+
+bool Option::addOccurrence(unsigned pos, const char *ArgName,
+                           const std::string &Value,
+                           bool MultiArg) {
+  if (!MultiArg)
+    NumOccurrences++;   // Increment the number of times we have been seen
+
+  switch (getNumOccurrencesFlag()) {
+  case Optional:
+    if (NumOccurrences > 1)
+      return error(": may only occur zero or one times!", ArgName);
+    break;
+  case Required:
+    if (NumOccurrences > 1)
+      return error(": must occur exactly one time!", ArgName);
+    // Fall through
+  case OneOrMore:
+  case ZeroOrMore:
+  case ConsumeAfter: break;
+  default: return error(": bad num occurrences flag value!");
+  }
+
+  return handleOccurrence(pos, ArgName, Value);
+}
+
+
+// getValueStr - Get the value description string, using "DefaultMsg" if nothing
+// has been specified yet.
+//
+static const char *getValueStr(const Option &O, const char *DefaultMsg) {
+  if (O.ValueStr[0] == 0) return DefaultMsg;
+  return O.ValueStr;
+}
+
+//===----------------------------------------------------------------------===//
+// cl::alias class implementation
+//
+
+// Return the width of the option tag for printing...
+size_t alias::getOptionWidth() const {
+  return std::strlen(ArgStr)+6;
+}
+
+// Print out the option for the alias.
+void alias::printOptionInfo(size_t GlobalWidth) const {
+  size_t L = std::strlen(ArgStr);
+  cout << "  -" << ArgStr << std::string(GlobalWidth-L-6, ' ') << " - "
+       << HelpStr << "\n";
+}
+
+
+
+//===----------------------------------------------------------------------===//
+// Parser Implementation code...
+//
+
+// basic_parser implementation
+//
+
+// Return the width of the option tag for printing...
+size_t basic_parser_impl::getOptionWidth(const Option &O) const {
+  size_t Len = std::strlen(O.ArgStr);
+  if (const char *ValName = getValueName())
+    Len += std::strlen(getValueStr(O, ValName))+3;
+
+  return Len + 6;
+}
+
+// printOptionInfo - Print out information about this option.  The
+// to-be-maintained width is specified.
+//
+void basic_parser_impl::printOptionInfo(const Option &O,
+                                        size_t GlobalWidth) const {
+  cout << "  -" << O.ArgStr;
+
+  if (const char *ValName = getValueName())
+    cout << "=<" << getValueStr(O, ValName) << ">";
+
+  cout << std::string(GlobalWidth-getOptionWidth(O), ' ') << " - "
+       << O.HelpStr << "\n";
+}
+
+
+
+
+// parser<bool> implementation
+//
+bool parser<bool>::parse(Option &O, const char *ArgName,
+                         const std::string &Arg, bool &Value) {
+  if (Arg == "" || Arg == "true" || Arg == "TRUE" || Arg == "True" ||
+      Arg == "1") {
+    Value = true;
+  } else if (Arg == "false" || Arg == "FALSE" || Arg == "False" || Arg == "0") {
+    Value = false;
+  } else {
+    return O.error(": '" + Arg +
+                   "' is invalid value for boolean argument! Try 0 or 1");
+  }
+  return false;
+}
+
+// parser<boolOrDefault> implementation
+//
+bool parser<boolOrDefault>::parse(Option &O, const char *ArgName,
+                         const std::string &Arg, boolOrDefault &Value) {
+  if (Arg == "" || Arg == "true" || Arg == "TRUE" || Arg == "True" ||
+      Arg == "1") {
+    Value = BOU_TRUE;
+  } else if (Arg == "false" || Arg == "FALSE"
+             || Arg == "False" || Arg == "0") {
+    Value = BOU_FALSE;
+  } else {
+    return O.error(": '" + Arg +
+                   "' is invalid value for boolean argument! Try 0 or 1");
+  }
+  return false;
+}
+
+// parser<int> implementation
+//
+bool parser<int>::parse(Option &O, const char *ArgName,
+                        const std::string &Arg, int &Value) {
+  char *End;
+  Value = (int)strtol(Arg.c_str(), &End, 0);
+  if (*End != 0)
+    return O.error(": '" + Arg + "' value invalid for integer argument!");
+  return false;
+}
+
+// parser<unsigned> implementation
+//
+bool parser<unsigned>::parse(Option &O, const char *ArgName,
+                             const std::string &Arg, unsigned &Value) {
+  char *End;
+  errno = 0;
+  unsigned long V = strtoul(Arg.c_str(), &End, 0);
+  Value = (unsigned)V;
+  if (((V == ULONG_MAX) && (errno == ERANGE))
+      || (*End != 0)
+      || (Value != V))
+    return O.error(": '" + Arg + "' value invalid for uint argument!");
+  return false;
+}
+
+// parser<double>/parser<float> implementation
+//
+static bool parseDouble(Option &O, const std::string &Arg, double &Value) {
+  const char *ArgStart = Arg.c_str();
+  char *End;
+  Value = strtod(ArgStart, &End);
+  if (*End != 0)
+    return O.error(": '" +Arg+ "' value invalid for floating point argument!");
+  return false;
+}
+
+bool parser<double>::parse(Option &O, const char *AN,
+                           const std::string &Arg, double &Val) {
+  return parseDouble(O, Arg, Val);
+}
+
+bool parser<float>::parse(Option &O, const char *AN,
+                          const std::string &Arg, float &Val) {
+  double dVal;
+  if (parseDouble(O, Arg, dVal))
+    return true;
+  Val = (float)dVal;
+  return false;
+}
+
+
+
+// generic_parser_base implementation
+//
+
+// findOption - Return the option number corresponding to the specified
+// argument string.  If the option is not found, getNumOptions() is returned.
+//
+unsigned generic_parser_base::findOption(const char *Name) {
+  unsigned i = 0, e = getNumOptions();
+  std::string N(Name);
+
+  while (i != e)
+    if (getOption(i) == N)
+      return i;
+    else
+      ++i;
+  return e;
+}
+
+
+// Return the width of the option tag for printing...
+size_t generic_parser_base::getOptionWidth(const Option &O) const {
+  if (O.hasArgStr()) {
+    size_t Size = std::strlen(O.ArgStr)+6;
+    for (unsigned i = 0, e = getNumOptions(); i != e; ++i)
+      Size = std::max(Size, std::strlen(getOption(i))+8);
+    return Size;
+  } else {
+    size_t BaseSize = 0;
+    for (unsigned i = 0, e = getNumOptions(); i != e; ++i)
+      BaseSize = std::max(BaseSize, std::strlen(getOption(i))+8);
+    return BaseSize;
+  }
+}
+
+// printOptionInfo - Print out information about this option.  The
+// to-be-maintained width is specified.
+//
+void generic_parser_base::printOptionInfo(const Option &O,
+                                          size_t GlobalWidth) const {
+  if (O.hasArgStr()) {
+    size_t L = std::strlen(O.ArgStr);
+    cout << "  -" << O.ArgStr << std::string(GlobalWidth-L-6, ' ')
+         << " - " << O.HelpStr << "\n";
+
+    for (unsigned i = 0, e = getNumOptions(); i != e; ++i) {
+      size_t NumSpaces = GlobalWidth-strlen(getOption(i))-8;
+      cout << "    =" << getOption(i) << std::string(NumSpaces, ' ')
+           << " -   " << getDescription(i) << "\n";
+    }
+  } else {
+    if (O.HelpStr[0])
+      cout << "  " << O.HelpStr << "\n";
+    for (unsigned i = 0, e = getNumOptions(); i != e; ++i) {
+      size_t L = std::strlen(getOption(i));
+      cout << "    -" << getOption(i) << std::string(GlobalWidth-L-8, ' ')
+           << " - " << getDescription(i) << "\n";
+    }
+  }
+}
+
+
+//===----------------------------------------------------------------------===//
+// --help and --help-hidden option implementation
+//
+
+namespace {
+
+class HelpPrinter {
+  size_t MaxArgLen;
+  const Option *EmptyArg;
+  const bool ShowHidden;
+
+  // isHidden/isReallyHidden - Predicates to be used to filter down arg lists.
+  inline static bool isHidden(std::pair<std::string, Option *> &OptPair) {
+    return OptPair.second->getOptionHiddenFlag() >= Hidden;
+  }
+  inline static bool isReallyHidden(std::pair<std::string, Option *> &OptPair) {
+    return OptPair.second->getOptionHiddenFlag() == ReallyHidden;
+  }
+
+public:
+  explicit HelpPrinter(bool showHidden) : ShowHidden(showHidden) {
+    EmptyArg = 0;
+  }
+
+  void operator=(bool Value) {
+    if (Value == false) return;
+
+    // Get all the options.
+    std::vector<Option*> PositionalOpts;
+    std::vector<Option*> SinkOpts;
+    std::map<std::string, Option*> OptMap;
+    GetOptionInfo(PositionalOpts, SinkOpts, OptMap);
+
+    // Copy Options into a vector so we can sort them as we like...
+    std::vector<std::pair<std::string, Option*> > Opts;
+    copy(OptMap.begin(), OptMap.end(), std::back_inserter(Opts));
+
+    // Eliminate Hidden or ReallyHidden arguments, depending on ShowHidden
+    Opts.erase(std::remove_if(Opts.begin(), Opts.end(),
+                          std::ptr_fun(ShowHidden ? isReallyHidden : isHidden)),
+               Opts.end());
+
+    // Eliminate duplicate entries in table (from enum flags options, f.e.)
+    {  // Give OptionSet a scope
+      std::set<Option*> OptionSet;
+      for (unsigned i = 0; i != Opts.size(); ++i)
+        if (OptionSet.count(Opts[i].second) == 0)
+          OptionSet.insert(Opts[i].second);   // Add new entry to set
+        else
+          Opts.erase(Opts.begin()+i--);    // Erase duplicate
+    }
+
+    if (ProgramOverview)
+      cout << "OVERVIEW: " << ProgramOverview << "\n";
+
+    cout << "USAGE: " << ProgramName << " [options]";
+
+    // Print out the positional options.
+    Option *CAOpt = 0;   // The cl::ConsumeAfter option, if it exists...
+    if (!PositionalOpts.empty() &&
+        PositionalOpts[0]->getNumOccurrencesFlag() == ConsumeAfter)
+      CAOpt = PositionalOpts[0];
+
+    for (size_t i = CAOpt != 0, e = PositionalOpts.size(); i != e; ++i) {
+      if (PositionalOpts[i]->ArgStr[0])
+        cout << " --" << PositionalOpts[i]->ArgStr;
+      cout << " " << PositionalOpts[i]->HelpStr;
+    }
+
+    // Print the consume after option info if it exists...
+    if (CAOpt) cout << " " << CAOpt->HelpStr;
+
+    cout << "\n\n";
+
+    // Compute the maximum argument length...
+    MaxArgLen = 0;
+    for (size_t i = 0, e = Opts.size(); i != e; ++i)
+      MaxArgLen = std::max(MaxArgLen, Opts[i].second->getOptionWidth());
+
+    cout << "OPTIONS:\n";
+    for (size_t i = 0, e = Opts.size(); i != e; ++i)
+      Opts[i].second->printOptionInfo(MaxArgLen);
+
+    // Print any extra help the user has declared.
+    for (std::vector<const char *>::iterator I = MoreHelp->begin(),
+          E = MoreHelp->end(); I != E; ++I)
+      cout << *I;
+    MoreHelp->clear();
+
+    // Halt the program since help information was printed
+    exit(1);
+  }
+};
+} // End anonymous namespace
+
+// Define the two HelpPrinter instances that are used to print out help, or
+// help-hidden...
+//
+static HelpPrinter NormalPrinter(false);
+static HelpPrinter HiddenPrinter(true);
+
+static cl::opt<HelpPrinter, true, parser<bool> >
+HOp("help", cl::desc("Display available options (--help-hidden for more)"),
+    cl::location(NormalPrinter), cl::ValueDisallowed);
+
+static cl::opt<HelpPrinter, true, parser<bool> >
+HHOp("help-hidden", cl::desc("Display all available options"),
+     cl::location(HiddenPrinter), cl::Hidden, cl::ValueDisallowed);
+
+static void (*OverrideVersionPrinter)() = 0;
+
+namespace {
+class VersionPrinter {
+public:
+  void print() {
+        cout << "Low Level Virtual Machine (http://llvm.org/):\n";
+        cout << "  " << PACKAGE_NAME << " version " << PACKAGE_VERSION;
+#ifdef LLVM_VERSION_INFO
+        cout << LLVM_VERSION_INFO;
+#endif
+        cout << "\n  ";
+#ifndef __OPTIMIZE__
+        cout << "DEBUG build";
+#else
+        cout << "Optimized build";
+#endif
+#ifndef NDEBUG
+        cout << " with assertions";
+#endif
+        cout << ".\n";
+        cout << "  Built " << __DATE__ << "(" << __TIME__ << ").\n";
+  }
+  void operator=(bool OptionWasSpecified) {
+    if (OptionWasSpecified) {
+      if (OverrideVersionPrinter == 0) {
+        print();
+        exit(1);
+      } else {
+        (*OverrideVersionPrinter)();
+        exit(1);
+      }
+    }
+  }
+};
+} // End anonymous namespace
+
+
+// Define the --version option that prints out the LLVM version for the tool
+static VersionPrinter VersionPrinterInstance;
+
+static cl::opt<VersionPrinter, true, parser<bool> >
+VersOp("version", cl::desc("Display the version of this program"),
+    cl::location(VersionPrinterInstance), cl::ValueDisallowed);
+
+// Utility function for printing the help message.
+void cl::PrintHelpMessage() {
+  // This looks weird, but it actually prints the help message. The
+  // NormalPrinter variable is a HelpPrinter and the help gets printed when
+  // its operator= is invoked. That's because the "normal" usages of the
+  // help printer is to be assigned true/false depending on whether the
+  // --help option was given or not. Since we're circumventing that we have
+  // to make it look like --help was given, so we assign true.
+  NormalPrinter = true;
+}
+
+/// Utility function for printing version number.
+void cl::PrintVersionMessage() {
+  VersionPrinterInstance.print();
+}
+
+void cl::SetVersionPrinter(void (*func)()) {
+  OverrideVersionPrinter = func;
+}