diff --git a/include/llvm/Debugger/SourceFile.h b/include/llvm/Debugger/SourceFile.h
index 249435a..155b45f 100644
--- a/include/llvm/Debugger/SourceFile.h
+++ b/include/llvm/Debugger/SourceFile.h
@@ -60,7 +60,7 @@
 
     /// getFilename - Return the fully resolved path that this file was loaded
     /// from.
-    const std::string &getFilename() const { return Filename.toString(); }
+    const std::string &getFilename() const { return Filename.str(); }
 
     /// getSourceLine - Given a line number, return the start and end of the
     /// line in the file.  If the line number is invalid, or if the file could
diff --git a/include/llvm/Linker.h b/include/llvm/Linker.h
index 2f3d374..1e1da86 100644
--- a/include/llvm/Linker.h
+++ b/include/llvm/Linker.h
@@ -14,11 +14,12 @@
 #ifndef LLVM_LINKER_H
 #define LLVM_LINKER_H
 
-#include "llvm/System/Path.h"
 #include <memory>
 #include <vector>
+#include "llvm/ADT/StringRef.h"
 
 namespace llvm {
+  namespace sys { class Path; }
 
 class Module;
 class LLVMContext;
@@ -64,11 +65,10 @@
     /// Construct the Linker with an empty module which will be given the
     /// name \p progname. \p progname will also be used for error messages.
     /// @brief Construct with empty module
-    Linker(
-        const StringRef& progname, ///< name of tool running linker
-        const StringRef& modulename, ///< name of linker's end-result module
-        LLVMContext& C, ///< Context for global info
-        unsigned Flags = 0  ///< ControlFlags (one or more |'d together)
+    Linker(const StringRef &progname, ///< name of tool running linker
+           const StringRef &modulename, ///< name of linker's end-result module
+           LLVMContext &C, ///< Context for global info
+           unsigned Flags = 0  ///< ControlFlags (one or more |'d together)
     );
 
     /// Construct the Linker with a previously defined module, \p aModule. Use
diff --git a/include/llvm/Support/GraphWriter.h b/include/llvm/Support/GraphWriter.h
index f77b3db..b88dd3f 100644
--- a/include/llvm/Support/GraphWriter.h
+++ b/include/llvm/Support/GraphWriter.h
@@ -257,10 +257,8 @@
 }
 
 template<typename GraphType>
-sys::Path WriteGraph(const GraphType &G,
-                     const std::string& Name,
-                     bool ShortNames = false,
-                     const std::string& Title = "") {
+sys::Path WriteGraph(const GraphType &G, const std::string &Name,
+                     bool ShortNames = false, const std::string &Title = "") {
   std::string ErrMsg;
   sys::Path Filename = sys::Path::GetTemporaryDirectory(&ErrMsg);
   if (Filename.isEmpty()) {
@@ -273,7 +271,7 @@
     return sys::Path();
   }
 
-  errs() << "Writing '" << Filename << "'... ";
+  errs() << "Writing '" << Filename.str() << "'... ";
 
   std::string ErrorInfo;
   raw_fd_ostream O(Filename.c_str(), ErrorInfo, raw_fd_ostream::F_Force);
@@ -282,7 +280,7 @@
     WriteGraph(O, G, ShortNames, Name, Title);
     errs() << " done. \n";
   } else {
-    errs() << "error opening file '" << Filename << "' for writing!\n";
+    errs() << "error opening file '" << Filename.str() << "' for writing!\n";
     Filename.clear();
   }
 
@@ -293,16 +291,13 @@
 /// then cleanup.  For use from the debugger.
 ///
 template<typename GraphType>
-void ViewGraph(const GraphType& G,
-               const std::string& Name,
-               bool ShortNames = false,
-               const std::string& Title = "",
+void ViewGraph(const GraphType &G, const std::string &Name,
+               bool ShortNames = false, const std::string &Title = "",
                GraphProgram::Name Program = GraphProgram::DOT) {
-  sys::Path Filename =  WriteGraph(G, Name, ShortNames, Title);
+  sys::Path Filename = WriteGraph(G, Name, ShortNames, Title);
 
-  if (Filename.isEmpty()) {
+  if (Filename.isEmpty())
     return;
-  }
 
   DisplayGraph(Filename, true, Program);
 }
diff --git a/include/llvm/System/Path.h b/include/llvm/System/Path.h
index 54c1066..3b73a12 100644
--- a/include/llvm/System/Path.h
+++ b/include/llvm/System/Path.h
@@ -15,11 +15,9 @@
 #define LLVM_SYSTEM_PATH_H
 
 #include "llvm/System/TimeValue.h"
-#include "llvm/Support/raw_ostream.h"
 #include <set>
 #include <string>
 #include <vector>
-#include <iosfwd>
 
 namespace llvm {
 namespace sys {
@@ -217,7 +215,7 @@
       /// Compares \p this Path with \p that Path for inequality.
       /// @returns true if \p this and \p that refer to different things.
       /// @brief Inequality Operator
-      bool operator!=(const Path &that) const;
+      bool operator!=(const Path &that) const { return !(*this == that); }
 
       /// Determines if \p this Path is less than \p that Path. This is required
       /// so that Path objects can be placed into ordered collections (e.g.
@@ -249,13 +247,7 @@
       /// @brief Determines if the path name is empty (invalid).
       bool isEmpty() const { return path.empty(); }
 
-      /// This function returns the current contents of the path as a
-      /// std::string. This allows the underlying path string to be manipulated.
-      /// @returns std::string containing the path name.
-      /// @brief Returns the path as a std::string.
-      const std::string &toString() const { return path; }
-
-      /// This function returns the last component of the path name. The last
+       /// This function returns the last component of the path name. The last
       /// component is the file or directory name occuring after the last
       /// directory separator. If no directory separator is present, the entire
       /// path name is returned (i.e. same as toString).
@@ -286,6 +278,8 @@
       /// @returns a 'C' string containing the path name.
       /// @brief Returns the path as a C string.
       const char *c_str() const { return path.c_str(); }
+      const std::string &str() const { return path; }
+
 
       /// size - Return the length in bytes of this path name.
       size_t size() const { return path.size(); }
@@ -716,24 +710,6 @@
   extern const char PathSeparator;
 }
 
-inline raw_ostream& operator<<(raw_ostream& strm, const sys::Path& aPath) {
-  strm << aPath.toString();
-  return strm;
-}
-
-inline raw_ostream& operator<<(raw_ostream& strm,
-                               const sys::PathWithStatus& aPath) {
-  strm << static_cast<const sys::Path&>(aPath);
-  return strm;
-}
-
-std::ostream& operator<<(std::ostream& strm, const sys::Path& aPath);
-inline std::ostream& operator<<(std::ostream& strm,
-                                const sys::PathWithStatus& aPath) {
-  strm << static_cast<const sys::Path&>(aPath);
-  return strm;
-}
-
 }
 
 #endif
diff --git a/include/llvm/System/TimeValue.h b/include/llvm/System/TimeValue.h
index b9ada00..4e419f1 100644
--- a/include/llvm/System/TimeValue.h
+++ b/include/llvm/System/TimeValue.h
@@ -271,7 +271,7 @@
     /// Provides conversion of the TimeValue into a readable time & date.
     /// @returns std::string containing the readable time value
     /// @brief Convert time to a string.
-    std::string toString() const;
+    std::string str() const;
 
   /// @}
   /// @name Mutators
diff --git a/lib/Archive/Archive.cpp b/lib/Archive/Archive.cpp
index 7811b6c..00778d9 100644
--- a/lib/Archive/Archive.cpp
+++ b/lib/Archive/Archive.cpp
@@ -31,7 +31,7 @@
 
   // If it has a long filename, include the name length
   if (hasLongFilename())
-    result += path.toString().length() + 1;
+    result += path.str().length() + 1;
 
   // If its now odd lengthed, include the padding byte
   if (result % 2 != 0 )
@@ -76,38 +76,38 @@
   path = newFile;
 
   // SVR4 symbol tables have an empty name
-  if (path.toString() == ARFILE_SVR4_SYMTAB_NAME)
+  if (path.str() == ARFILE_SVR4_SYMTAB_NAME)
     flags |= SVR4SymbolTableFlag;
   else
     flags &= ~SVR4SymbolTableFlag;
 
   // BSD4.4 symbol tables have a special name
-  if (path.toString() == ARFILE_BSD4_SYMTAB_NAME)
+  if (path.str() == ARFILE_BSD4_SYMTAB_NAME)
     flags |= BSD4SymbolTableFlag;
   else
     flags &= ~BSD4SymbolTableFlag;
 
   // LLVM symbol tables have a very specific name
-  if (path.toString() == ARFILE_LLVM_SYMTAB_NAME)
+  if (path.str() == ARFILE_LLVM_SYMTAB_NAME)
     flags |= LLVMSymbolTableFlag;
   else
     flags &= ~LLVMSymbolTableFlag;
 
   // String table name
-  if (path.toString() == ARFILE_STRTAB_NAME)
+  if (path.str() == ARFILE_STRTAB_NAME)
     flags |= StringTableFlag;
   else
     flags &= ~StringTableFlag;
 
   // If it has a slash then it has a path
-  bool hasSlash = path.toString().find('/') != std::string::npos;
+  bool hasSlash = path.str().find('/') != std::string::npos;
   if (hasSlash)
     flags |= HasPathFlag;
   else
     flags &= ~HasPathFlag;
 
   // If it has a slash or its over 15 chars then its a long filename format
-  if (hasSlash || path.toString().length() > 15)
+  if (hasSlash || path.str().length() > 15)
     flags |= HasLongFilenameFlag;
   else
     flags &= ~HasLongFilenameFlag;
@@ -217,7 +217,7 @@
   std::auto_ptr<MemoryBuffer> Buffer(
                        MemoryBuffer::getFileOrSTDIN(fName.c_str()));
   if (!Buffer.get()) {
-    if (ErrMsg) *ErrMsg = "Could not open file '" + fName.toString() + "'";
+    if (ErrMsg) *ErrMsg = "Could not open file '" + fName.str() + "'";
     return true;
   }
   
diff --git a/lib/Archive/ArchiveReader.cpp b/lib/Archive/ArchiveReader.cpp
index 718d446..74895d8 100644
--- a/lib/Archive/ArchiveReader.cpp
+++ b/lib/Archive/ArchiveReader.cpp
@@ -344,8 +344,8 @@
 
   for (iterator I=begin(), E=end(); I != E; ++I) {
     if (I->isBitcode()) {
-      std::string FullMemberName = archPath.toString() +
-        "(" + I->getPath().toString() + ")";
+      std::string FullMemberName = archPath.str() +
+        "(" + I->getPath().str() + ")";
       MemoryBuffer *Buffer =
         MemoryBuffer::getNewMemBuffer(I->getSize(), FullMemberName.c_str());
       memcpy((char*)Buffer->getBufferStart(), I->getData(), I->getSize());
@@ -484,8 +484,8 @@
     return 0;
 
   // Now, load the bitcode module to get the ModuleProvider
-  std::string FullMemberName = archPath.toString() + "(" +
-    mbr->getPath().toString() + ")";
+  std::string FullMemberName = archPath.str() + "(" +
+    mbr->getPath().str() + ")";
   MemoryBuffer *Buffer =MemoryBuffer::getNewMemBuffer(mbr->getSize(),
                                                       FullMemberName.c_str());
   memcpy((char*)Buffer->getBufferStart(), mbr->getData(), mbr->getSize());
@@ -534,8 +534,8 @@
       if (mbr->isBitcode()) {
         // Get the symbols
         std::vector<std::string> symbols;
-        std::string FullMemberName = archPath.toString() + "(" +
-          mbr->getPath().toString() + ")";
+        std::string FullMemberName = archPath.str() + "(" +
+          mbr->getPath().str() + ")";
         ModuleProvider* MP = 
           GetBitcodeSymbols((const unsigned char*)At, mbr->getSize(),
                             FullMemberName, Context, symbols, error);
@@ -552,7 +552,7 @@
         } else {
           if (error)
             *error = "Can't parse bitcode member: " + 
-              mbr->getPath().toString() + ": " + *error;
+              mbr->getPath().str() + ": " + *error;
           delete mbr;
           return false;
         }
@@ -612,7 +612,7 @@
       continue;
     
     std::string FullMemberName = 
-      archPath.toString() + "(" + I->getPath().toString() + ")";
+      archPath.str() + "(" + I->getPath().str() + ")";
 
     MemoryBuffer *Buffer =
       MemoryBuffer::getNewMemBuffer(I->getSize(), FullMemberName.c_str());
diff --git a/lib/Archive/ArchiveWriter.cpp b/lib/Archive/ArchiveWriter.cpp
index 881d75b..d17f6b5 100644
--- a/lib/Archive/ArchiveWriter.cpp
+++ b/lib/Archive/ArchiveWriter.cpp
@@ -95,7 +95,7 @@
   memcpy(hdr.date,buffer,12);
 
   // Get rid of trailing blanks in the name
-  std::string mbrPath = mbr.getPath().toString();
+  std::string mbrPath = mbr.getPath().str();
   size_t mbrLen = mbrPath.length();
   while (mbrLen > 0 && mbrPath[mbrLen-1] == ' ') {
     mbrPath.erase(mbrLen-1,1);
@@ -173,10 +173,10 @@
   mbr->info = *FSInfo;
 
   unsigned flags = 0;
-  bool hasSlash = filePath.toString().find('/') != std::string::npos;
+  bool hasSlash = filePath.str().find('/') != std::string::npos;
   if (hasSlash)
     flags |= ArchiveMember::HasPathFlag;
-  if (hasSlash || filePath.toString().length() > 15)
+  if (hasSlash || filePath.str().length() > 15)
     flags |= ArchiveMember::HasLongFilenameFlag;
   std::string magic;
   mbr->path.getMagicNumber(magic,4);
@@ -223,8 +223,7 @@
   // symbol table if its a bitcode file.
   if (CreateSymbolTable && member.isBitcode()) {
     std::vector<std::string> symbols;
-    std::string FullMemberName = archPath.toString() + "(" +
-      member.getPath().toString()
+    std::string FullMemberName = archPath.str() + "(" + member.getPath().str()
       + ")";
     ModuleProvider* MP = 
       GetBitcodeSymbols((const unsigned char*)data,fSize,
@@ -249,7 +248,7 @@
     } else {
       delete mFile;
       if (ErrMsg)
-        *ErrMsg = "Can't parse bitcode member: " + member.getPath().toString()
+        *ErrMsg = "Can't parse bitcode member: " + member.getPath().str()
           + ": " + *ErrMsg;
       return true;
     }
@@ -266,8 +265,8 @@
 
   // Write the long filename if its long
   if (writeLongName) {
-    ARFile.write(member.getPath().toString().data(),
-                 member.getPath().toString().length());
+    ARFile.write(member.getPath().str().data(),
+                 member.getPath().str().length());
   }
 
   // Write the (possibly compressed) member's content to the file.
@@ -371,7 +370,7 @@
     if (TmpArchive.exists())
       TmpArchive.eraseFromDisk();
     if (ErrMsg)
-      *ErrMsg = "Error opening archive file: " + archPath.toString();
+      *ErrMsg = "Error opening archive file: " + archPath.str();
     return true;
   }
 
@@ -425,7 +424,7 @@
       if (TmpArchive.exists())
         TmpArchive.eraseFromDisk();
       if (ErrMsg)
-        *ErrMsg = "Error opening archive file: " + FinalFilePath.toString();
+        *ErrMsg = "Error opening archive file: " + FinalFilePath.str();
       return true;
     }
 
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 83a7772..ab86998 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -1343,7 +1343,7 @@
         FullPath.appendComponent(getSourceFileName(Id.second));
       assert(AppendOk && "Could not append filename to directory!");
       AppendOk = false;
-      Asm->EmitFile(i, FullPath.toString());
+      Asm->EmitFile(i, FullPath.str());
       Asm->EOL();
     }
   }
diff --git a/lib/Debugger/ProgramInfo.cpp b/lib/Debugger/ProgramInfo.cpp
index f649ebe..5ba1c70 100644
--- a/lib/Debugger/ProgramInfo.cpp
+++ b/lib/Debugger/ProgramInfo.cpp
@@ -22,6 +22,7 @@
 #include "llvm/Module.h"
 #include "llvm/Debugger/SourceFile.h"
 #include "llvm/Debugger/SourceLanguage.h"
+#include "llvm/Support/raw_ostream.h"
 #include "llvm/Support/SlowOperationInformer.h"
 #include "llvm/ADT/STLExtras.h"
 using namespace llvm;
@@ -135,7 +136,7 @@
       tmpPath.set(Directory);
     tmpPath.appendComponent(BaseName);
     if (tmpPath.canRead())
-      SourceText = new SourceFile(tmpPath.toString(), Descriptor);
+      SourceText = new SourceFile(tmpPath.str(), Descriptor);
     else
       SourceText = new SourceFile(BaseName, Descriptor);
   }
diff --git a/lib/Linker/LinkArchives.cpp b/lib/Linker/LinkArchives.cpp
index faf01af..76d81c2 100644
--- a/lib/Linker/LinkArchives.cpp
+++ b/lib/Linker/LinkArchives.cpp
@@ -96,10 +96,10 @@
 Linker::LinkInArchive(const sys::Path &Filename, bool &is_native) {
   // Make sure this is an archive file we're dealing with
   if (!Filename.isArchive())
-    return error("File '" + Filename.toString() + "' is not an archive.");
+    return error("File '" + Filename.str() + "' is not an archive.");
 
   // Open the archive file
-  verbose("Linking archive file '" + Filename.toString() + "'");
+  verbose("Linking archive file '" + Filename.str() + "'");
 
   // Find all of the symbols currently undefined in the bitcode program.
   // If all the symbols are defined, the program is complete, and there is
@@ -108,8 +108,7 @@
   GetAllUndefinedSymbols(Composite, UndefinedSymbols);
 
   if (UndefinedSymbols.empty()) {
-    verbose("No symbols undefined, skipping library '" +
-            Filename.toString() + "'");
+    verbose("No symbols undefined, skipping library '" + Filename.str() + "'");
     return false;  // No need to link anything in!
   }
 
@@ -120,7 +119,7 @@
   Archive* arch = AutoArch.get();
 
   if (!arch)
-    return error("Cannot read archive '" + Filename.toString() +
+    return error("Cannot read archive '" + Filename.str() +
                  "': " + ErrMsg);
   if (!arch->isBitcodeArchive()) {
     is_native = true;
@@ -143,7 +142,7 @@
     // Find the modules we need to link into the target module
     std::set<ModuleProvider*> Modules;
     if (!arch->findModulesDefiningSymbols(UndefinedSymbols, Modules, &ErrMsg))
-      return error("Cannot find symbols in '" + Filename.toString() + 
+      return error("Cannot find symbols in '" + Filename.str() + 
                    "': " + ErrMsg);
 
     // If we didn't find any more modules to link this time, we are done
diff --git a/lib/Linker/LinkItems.cpp b/lib/Linker/LinkItems.cpp
index 3c9a857..61f3c26 100644
--- a/lib/Linker/LinkItems.cpp
+++ b/lib/Linker/LinkItems.cpp
@@ -14,10 +14,10 @@
 
 #include "llvm/Linker.h"
 #include "llvm/Module.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/System/Path.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/MemoryBuffer.h"
-#include "llvm/Bitcode/ReaderWriter.h"
-
 using namespace llvm;
 
 // LinkItems - This function is the main entry point into linking. It takes a
@@ -93,7 +93,7 @@
 
     case sys::Archive_FileType:
       if (LinkInArchive(Pathname, is_native))
-        return error("Cannot link archive '" + Pathname.toString() + "'");
+        return error("Cannot link archive '" + Pathname.str() + "'");
       break;
 
     case sys::ELF_Relocatable_FileType:
@@ -158,7 +158,7 @@
   is_native = false;
   
   // Check for a file of name "-", which means "read standard input"
-  if (File.toString() == "-") {
+  if (File.str() == "-") {
     std::auto_ptr<Module> M;
     if (MemoryBuffer *Buffer = MemoryBuffer::getSTDIN()) {
       M.reset(ParseBitcodeFile(Buffer, Context, &Error));
@@ -173,7 +173,7 @@
 
   // Make sure we can at least read the file
   if (!File.canRead())
-    return error("Cannot find linker input '" + File.toString() + "'");
+    return error("Cannot find linker input '" + File.str() + "'");
 
   // If its an archive, try to link it in
   std::string Magic;
@@ -181,26 +181,26 @@
   switch (sys::IdentifyFileType(Magic.c_str(), 64)) {
     default: llvm_unreachable("Bad file type identification");
     case sys::Unknown_FileType:
-      return warning("Ignoring file '" + File.toString() + 
+      return warning("Ignoring file '" + File.str() + 
                    "' because does not contain bitcode.");
 
     case sys::Archive_FileType:
       // A user may specify an ar archive without -l, perhaps because it
       // is not installed as a library. Detect that and link the archive.
-      verbose("Linking archive file '" + File.toString() + "'");
+      verbose("Linking archive file '" + File.str() + "'");
       if (LinkInArchive(File, is_native))
         return true;
       break;
 
     case sys::Bitcode_FileType: {
-      verbose("Linking bitcode file '" + File.toString() + "'");
+      verbose("Linking bitcode file '" + File.str() + "'");
       std::auto_ptr<Module> M(LoadObject(File));
       if (M.get() == 0)
-        return error("Cannot load file '" + File.toString() + "': " + Error);
+        return error("Cannot load file '" + File.str() + "': " + Error);
       if (LinkInModule(M.get(), &Error))
-        return error("Cannot link file '" + File.toString() + "': " + Error);
+        return error("Cannot link file '" + File.str() + "': " + Error);
 
-      verbose("Linked in file '" + File.toString() + "'");
+      verbose("Linked in file '" + File.str() + "'");
       break;
     }
 
diff --git a/lib/Linker/LinkModules.cpp b/lib/Linker/LinkModules.cpp
index effba47..0fa97c5 100644
--- a/lib/Linker/LinkModules.cpp
+++ b/lib/Linker/LinkModules.cpp
@@ -26,6 +26,7 @@
 #include "llvm/Instructions.h"
 #include "llvm/Assembly/Writer.h"
 #include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/raw_ostream.h"
 #include "llvm/System/Path.h"
 #include "llvm/ADT/DenseMap.h"
 #include <sstream>
diff --git a/lib/Linker/Linker.cpp b/lib/Linker/Linker.cpp
index bd569b5..aef79d0 100644
--- a/lib/Linker/Linker.cpp
+++ b/lib/Linker/Linker.cpp
@@ -14,9 +14,10 @@
 #include "llvm/Linker.h"
 #include "llvm/Module.h"
 #include "llvm/Bitcode/ReaderWriter.h"
-#include "llvm/Config/config.h"
+#include "llvm/System/Path.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/raw_ostream.h"
+#include "llvm/Config/config.h"
 using namespace llvm;
 
 Linker::Linker(const StringRef &progname, const StringRef &modname,
@@ -69,11 +70,8 @@
 
 void
 Linker::addPaths(const std::vector<std::string>& paths) {
-  for (unsigned i = 0; i != paths.size(); ++i) {
-    sys::Path aPath;
-    aPath.set(paths[i]);
-    LibPaths.push_back(aPath);
-  }
+  for (unsigned i = 0, e = paths.size(); i != e; ++i)
+    LibPaths.push_back(sys::Path(paths[i]));
 }
 
 void
@@ -100,16 +98,15 @@
   std::string ParseErrorMessage;
   Module *Result = 0;
   
-  const std::string &FNS = FN.toString();
-  std::auto_ptr<MemoryBuffer> Buffer(MemoryBuffer::getFileOrSTDIN(FNS.c_str()));
+  std::auto_ptr<MemoryBuffer> Buffer(MemoryBuffer::getFileOrSTDIN(FN.c_str()));
   if (Buffer.get())
     Result = ParseBitcodeFile(Buffer.get(), Context, &ParseErrorMessage);
   else
-    ParseErrorMessage = "Error reading file '" + FNS + "'";
+    ParseErrorMessage = "Error reading file '" + FN.str() + "'";
     
   if (Result)
     return std::auto_ptr<Module>(Result);
-  Error = "Bitcode file '" + FN.toString() + "' could not be loaded";
+  Error = "Bitcode file '" + FN.str() + "' could not be loaded";
   if (ParseErrorMessage.size())
     Error += ": " + ParseErrorMessage;
   return std::auto_ptr<Module>();
diff --git a/lib/Support/GraphWriter.cpp b/lib/Support/GraphWriter.cpp
index 9d72db1..a3d2d6c 100644
--- a/lib/Support/GraphWriter.cpp
+++ b/lib/Support/GraphWriter.cpp
@@ -64,9 +64,10 @@
   
   errs() << "Running 'Graphviz' program... ";
   if (sys::Program::ExecuteAndWait(Graphviz, &args[0],0,0,0,0,&ErrMsg))
-     errs() << "Error viewing graph " << Filename << ": " << ErrMsg << "\n";
+    errs() << "Error viewing graph " << Filename.str() << ": " << ErrMsg
+           << "\n";
   else
-     Filename.eraseFromDisk();
+    Filename.eraseFromDisk();
 
 #elif (HAVE_GV && (HAVE_DOT || HAVE_FDP || HAVE_NEATO || \
                    HAVE_TWOPI || HAVE_CIRCO))
diff --git a/lib/Support/SystemUtils.cpp b/lib/Support/SystemUtils.cpp
index 7756e03..3d3649e 100644
--- a/lib/Support/SystemUtils.cpp
+++ b/lib/Support/SystemUtils.cpp
@@ -15,6 +15,7 @@
 #include "llvm/Support/SystemUtils.h"
 #include "llvm/System/Process.h"
 #include "llvm/System/Program.h"
+#include "llvm/Support/raw_ostream.h"
 using namespace llvm;
 
 bool llvm::CheckBitcodeOutputToConsole(raw_ostream &stream_to_check,
diff --git a/lib/System/Path.cpp b/lib/System/Path.cpp
index ce4762e..df33574 100644
--- a/lib/System/Path.cpp
+++ b/lib/System/Path.cpp
@@ -29,19 +29,10 @@
   return path == that.path;
 }
 
-bool Path::operator!=(const Path &that) const {
-  return path != that.path;
-}
-
 bool Path::operator<(const Path& that) const {
   return path < that.path;
 }
 
-std::ostream& llvm::operator<<(std::ostream &strm, const sys::Path &aPath) {
-  strm << aPath.toString();
-  return strm;
-}
-
 Path
 Path::GetLLVMConfigDir() {
   Path result;
diff --git a/lib/System/Unix/Path.inc b/lib/System/Unix/Path.inc
index a54fcfd..7139f4e 100644
--- a/lib/System/Unix/Path.inc
+++ b/lib/System/Unix/Path.inc
@@ -119,7 +119,7 @@
 
   CWD.appendComponent(path);
 
-  path = CWD.toString();
+  path = CWD.str();
 }
 
 Path
@@ -502,7 +502,7 @@
 
   // Get the file's current mode.
   struct stat buf;
-  if (0 != stat(File.toString().c_str(), &buf))
+  if (0 != stat(File.c_str(), &buf))
     return false;
   // Change the file to have whichever permissions bits from 'bits'
   // that the umask would not disable.
@@ -759,7 +759,7 @@
 Path::renamePathOnDisk(const Path& newName, std::string* ErrMsg) {
   if (0 != ::rename(path.c_str(), newName.c_str()))
     return MakeErrMsg(ErrMsg, std::string("can't rename '") + path + "' as '" +
-               newName.toString() + "'");
+               newName.str() + "'");
   return false;
 }
 
@@ -781,13 +781,13 @@
   int outFile = -1;
   inFile = ::open(Src.c_str(), O_RDONLY);
   if (inFile == -1)
-    return MakeErrMsg(ErrMsg, Src.toString() +
+    return MakeErrMsg(ErrMsg, Src.str() +
       ": can't open source file to copy");
 
   outFile = ::open(Dest.c_str(), O_WRONLY|O_CREAT, 0666);
   if (outFile == -1) {
     ::close(inFile);
-    return MakeErrMsg(ErrMsg, Dest.toString() +
+    return MakeErrMsg(ErrMsg, Dest.str() +
       ": can't create destination file for copy");
   }
 
@@ -797,7 +797,7 @@
       if (errno != EINTR && errno != EAGAIN) {
         ::close(inFile);
         ::close(outFile);
-        return MakeErrMsg(ErrMsg, Src.toString()+": can't read source file");
+        return MakeErrMsg(ErrMsg, Src.str()+": can't read source file");
       }
     } else {
       char *BufPtr = Buffer;
@@ -807,7 +807,7 @@
           if (errno != EINTR && errno != EAGAIN) {
             ::close(inFile);
             ::close(outFile);
-            return MakeErrMsg(ErrMsg, Dest.toString() +
+            return MakeErrMsg(ErrMsg, Dest.str() +
               ": can't write destination file");
           }
         } else {
diff --git a/lib/System/Unix/Program.inc b/lib/System/Unix/Program.inc
index 14bc7b1..84e025c 100644
--- a/lib/System/Unix/Program.inc
+++ b/lib/System/Unix/Program.inc
@@ -97,7 +97,7 @@
     // Redirect empty paths to /dev/null
     File = "/dev/null";
   else
-    File = Path->toString();
+    File = Path->str();
 
   // Open the file
   int InFD = open(File.c_str(), FD == 0 ? O_RDONLY : O_WRONLY|O_CREAT, 0666);
@@ -156,7 +156,7 @@
 {
   if (!path.canExecute()) {
     if (ErrMsg)
-      *ErrMsg = path.toString() + " is not executable";
+      *ErrMsg = path.str() + " is not executable";
     return false;
   }
 
diff --git a/lib/System/Unix/TimeValue.inc b/lib/System/Unix/TimeValue.inc
index 8dd30b9..1ae8c71 100644
--- a/lib/System/Unix/TimeValue.inc
+++ b/lib/System/Unix/TimeValue.inc
@@ -21,7 +21,7 @@
 namespace llvm {
   using namespace sys;
 
-std::string TimeValue::toString() const {
+std::string TimeValue::str() const {
   char buffer[32];
 
   time_t ourTime = time_t(this->toEpochTime());
diff --git a/lib/System/Win32/Path.inc b/lib/System/Win32/Path.inc
index fccf001..46b965f 100644
--- a/lib/System/Win32/Path.inc
+++ b/lib/System/Win32/Path.inc
@@ -808,8 +808,8 @@
   // Can't use CopyFile macro defined in Windows.h because it would mess up the
   // above line.  We use the expansion it would have in a non-UNICODE build.
   if (!::CopyFileA(Src.c_str(), Dest.c_str(), false))
-    return MakeErrMsg(ErrMsg, "Can't copy '" + Src.toString() +
-               "' to '" + Dest.toString() + "': ");
+    return MakeErrMsg(ErrMsg, "Can't copy '" + Src.str() +
+               "' to '" + Dest.str() + "': ");
   return false;
 }
 
diff --git a/lib/System/Win32/Program.inc b/lib/System/Win32/Program.inc
index 005f631..804273b 100644
--- a/lib/System/Win32/Program.inc
+++ b/lib/System/Win32/Program.inc
@@ -92,7 +92,7 @@
   if (path->isEmpty())
     fname = "NUL";
   else
-    fname = path->toString().c_str();
+    fname = path->c_str();
 
   SECURITY_ATTRIBUTES sa;
   sa.nLength = sizeof(sa);
@@ -258,11 +258,10 @@
   CloseHandle(si.hStdError);
 
   // Now return an error if the process didn't get created.
-  if (!rc)
-  {
+  if (!rc) {
     SetLastError(err);
     MakeErrMsg(ErrMsg, std::string("Couldn't execute program '") +
-               path.toString() + "'");
+               path.str() + "'");
     return false;
   }
   Pid_ = pi.dwProcessId;
diff --git a/lib/System/Win32/TimeValue.inc b/lib/System/Win32/TimeValue.inc
index 0ca87d4..e37f111 100644
--- a/lib/System/Win32/TimeValue.inc
+++ b/lib/System/Win32/TimeValue.inc
@@ -30,7 +30,7 @@
   return t;
 }
 
-std::string TimeValue::toString() const {
+std::string TimeValue::str() const {
 #ifdef __MINGW32__
   // This ban may be lifted by either:
   // (i) a future MinGW version other than 1.0 inherents the __time64_t type, or
diff --git a/tools/bugpoint/CrashDebugger.cpp b/tools/bugpoint/CrashDebugger.cpp
index 4e15732..b348a08 100644
--- a/tools/bugpoint/CrashDebugger.cpp
+++ b/tools/bugpoint/CrashDebugger.cpp
@@ -72,10 +72,10 @@
     PrefixOutput.set(PfxOutput);
     OrigProgram = BD.Program;
 
-    BD.Program = ParseInputFile(PrefixOutput.toString(), BD.getContext());
+    BD.Program = ParseInputFile(PrefixOutput.str(), BD.getContext());
     if (BD.Program == 0) {
       errs() << BD.getToolName() << ": Error reading bitcode file '"
-             << PrefixOutput << "'!\n";
+             << PrefixOutput.str() << "'!\n";
       exit(1);
     }
     PrefixOutput.eraseFromDisk();
diff --git a/tools/bugpoint/ExecutionDriver.cpp b/tools/bugpoint/ExecutionDriver.cpp
index 3916957..72b9717 100644
--- a/tools/bugpoint/ExecutionDriver.cpp
+++ b/tools/bugpoint/ExecutionDriver.cpp
@@ -18,6 +18,7 @@
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/FileUtilities.h"
 #include "llvm/Support/SystemUtils.h"
+#include "llvm/Support/raw_ostream.h"
 #include <fstream>
 
 using namespace llvm;
@@ -280,9 +281,9 @@
            << "\n";
     exit(1);
   }
-  if (writeProgramToFile(BitcodeFile.toString(), M)) {
+  if (writeProgramToFile(BitcodeFile.str(), M)) {
     errs() << ToolName << ": Error emitting bitcode to file '"
-           << BitcodeFile << "'!\n";
+           << BitcodeFile.str() << "'!\n";
     exit(1);
   }
 
@@ -290,7 +291,7 @@
   FileRemover BitcodeFileRemover(BitcodeFile, !SaveTemps);
 
   // Actually compile the program!
-  Interpreter->compileProgram(BitcodeFile.toString());
+  Interpreter->compileProgram(BitcodeFile.str());
 }
 
 
@@ -315,7 +316,7 @@
              << ErrMsg << "!\n";
       exit(1);
     }
-    BitcodeFile = uniqueFilename.toString();
+    BitcodeFile = uniqueFilename.str();
 
     if (writeProgramToFile(BitcodeFile, Program)) {
       errs() << ToolName << ": Error emitting bitcode to file '"
@@ -338,7 +339,7 @@
            << ErrMsg << "\n";
     exit(1);
   }
-  OutputFile = uniqueFile.toString();
+  OutputFile = uniqueFile.str();
 
   // Figure out which shared objects to run, if any.
   std::vector<std::string> SharedObjs(AdditionalSOs);
@@ -393,7 +394,7 @@
   GCC::FileType FT = SafeInterpreter->OutputCode(BitcodeFile, OutputFile);
 
   std::string SharedObjectFile;
-  if (gcc->MakeSharedObject(OutputFile.toString(), FT,
+  if (gcc->MakeSharedObject(OutputFile.str(), FT,
                             SharedObjectFile, AdditionalLinkerArgs))
     exit(1);
 
@@ -447,7 +448,7 @@
   std::string Error;
   bool FilesDifferent = false;
   if (int Diff = DiffFilesWithTolerance(sys::Path(ReferenceOutputFile),
-                                        sys::Path(Output.toString()),
+                                        sys::Path(Output.str()),
                                         AbsTolerance, RelTolerance, &Error)) {
     if (Diff == 2) {
       errs() << "While diffing output: " << Error << '\n';
diff --git a/tools/bugpoint/ExtractFunction.cpp b/tools/bugpoint/ExtractFunction.cpp
index b2e427c..31982e1 100644
--- a/tools/bugpoint/ExtractFunction.cpp
+++ b/tools/bugpoint/ExtractFunction.cpp
@@ -29,6 +29,7 @@
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/FileUtilities.h"
+#include "llvm/Support/raw_ostream.h"
 #include "llvm/System/Path.h"
 #include "llvm/System/Signals.h"
 #include <set>
diff --git a/tools/bugpoint/FindBugs.cpp b/tools/bugpoint/FindBugs.cpp
index fd1f84b..2c11d29 100644
--- a/tools/bugpoint/FindBugs.cpp
+++ b/tools/bugpoint/FindBugs.cpp
@@ -17,6 +17,7 @@
 #include "BugDriver.h"
 #include "ToolRunner.h"
 #include "llvm/Pass.h"
+#include "llvm/Support/raw_ostream.h"
 #include <algorithm>
 #include <ctime>
 using namespace llvm;
diff --git a/tools/bugpoint/Miscompilation.cpp b/tools/bugpoint/Miscompilation.cpp
index 9c14147..57a4fc7 100644
--- a/tools/bugpoint/Miscompilation.cpp
+++ b/tools/bugpoint/Miscompilation.cpp
@@ -826,8 +826,9 @@
            << ErrMsg << "\n";
     exit(1);
   }
-  if (BD.writeProgramToFile(TestModuleBC.toString(), Test)) {
-    errs() << "Error writing bitcode to `" << TestModuleBC << "'\nExiting.";
+  if (BD.writeProgramToFile(TestModuleBC.str(), Test)) {
+    errs() << "Error writing bitcode to `" << TestModuleBC.str()
+           << "'\nExiting.";
     exit(1);
   }
   delete Test;
@@ -840,16 +841,17 @@
     exit(1);
   }
 
-  if (BD.writeProgramToFile(SafeModuleBC.toString(), Safe)) {
-    errs() << "Error writing bitcode to `" << SafeModuleBC << "'\nExiting.";
+  if (BD.writeProgramToFile(SafeModuleBC.str(), Safe)) {
+    errs() << "Error writing bitcode to `" << SafeModuleBC.str()
+           << "'\nExiting.";
     exit(1);
   }
-  std::string SharedObject = BD.compileSharedObject(SafeModuleBC.toString());
+  std::string SharedObject = BD.compileSharedObject(SafeModuleBC.str());
   delete Safe;
 
   // Run the code generator on the `Test' code, loading the shared library.
   // The function returns whether or not the new output differs from reference.
-  int Result = BD.diffProgram(TestModuleBC.toString(), SharedObject, false);
+  int Result = BD.diffProgram(TestModuleBC.str(), SharedObject, false);
 
   if (Result)
     errs() << ": still failing!\n";
@@ -899,8 +901,9 @@
     exit(1);
   }
 
-  if (writeProgramToFile(TestModuleBC.toString(), ToCodeGen)) {
-    errs() << "Error writing bitcode to `" << TestModuleBC << "'\nExiting.";
+  if (writeProgramToFile(TestModuleBC.str(), ToCodeGen)) {
+    errs() << "Error writing bitcode to `" << TestModuleBC.str()
+           << "'\nExiting.";
     exit(1);
   }
   delete ToCodeGen;
@@ -913,31 +916,33 @@
     exit(1);
   }
 
-  if (writeProgramToFile(SafeModuleBC.toString(), ToNotCodeGen)) {
-    errs() << "Error writing bitcode to `" << SafeModuleBC << "'\nExiting.";
+  if (writeProgramToFile(SafeModuleBC.str(), ToNotCodeGen)) {
+    errs() << "Error writing bitcode to `" << SafeModuleBC.str()
+           << "'\nExiting.";
     exit(1);
   }
-  std::string SharedObject = compileSharedObject(SafeModuleBC.toString());
+  std::string SharedObject = compileSharedObject(SafeModuleBC.str());
   delete ToNotCodeGen;
 
   outs() << "You can reproduce the problem with the command line: \n";
   if (isExecutingJIT()) {
-    outs() << "  lli -load " << SharedObject << " " << TestModuleBC;
+    outs() << "  lli -load " << SharedObject << " " << TestModuleBC.str();
   } else {
-    outs() << "  llc -f " << TestModuleBC << " -o " << TestModuleBC<< ".s\n";
-    outs() << "  gcc " << SharedObject << " " << TestModuleBC
-              << ".s -o " << TestModuleBC << ".exe";
+    outs() << "  llc -f " << TestModuleBC.str() << " -o " << TestModuleBC.str()
+           << ".s\n";
+    outs() << "  gcc " << SharedObject << " " << TestModuleBC.str()
+              << ".s -o " << TestModuleBC.str() << ".exe";
 #if defined (HAVE_LINK_R)
     outs() << " -Wl,-R.";
 #endif
     outs() << "\n";
-    outs() << "  " << TestModuleBC << ".exe";
+    outs() << "  " << TestModuleBC.str() << ".exe";
   }
   for (unsigned i=0, e = InputArgv.size(); i != e; ++i)
     outs() << " " << InputArgv[i];
   outs() << '\n';
   outs() << "The shared object was created with:\n  llc -march=c "
-         << SafeModuleBC << " -o temporary.c\n"
+         << SafeModuleBC.str() << " -o temporary.c\n"
          << "  gcc -xc temporary.c -O2 -o " << SharedObject;
   if (TargetTriple.getArch() == Triple::sparc)
     outs() << " -G";              // Compile a shared library, `-G' for Sparc
diff --git a/tools/bugpoint/OptimizerDriver.cpp b/tools/bugpoint/OptimizerDriver.cpp
index ef41c43..0c9037f 100644
--- a/tools/bugpoint/OptimizerDriver.cpp
+++ b/tools/bugpoint/OptimizerDriver.cpp
@@ -27,9 +27,9 @@
 #include "llvm/Target/TargetData.h"
 #include "llvm/Support/FileUtilities.h"
 #include "llvm/Support/CommandLine.h"
+#include "llvm/Support/raw_ostream.h"
 #include "llvm/System/Path.h"
 #include "llvm/System/Program.h"
-#include "llvm/Config/alloca.h"
 
 #define DONT_GET_PLUGIN_LOADER_OPTION
 #include "llvm/Support/PluginLoader.h"
@@ -136,7 +136,7 @@
            << ErrMsg << "\n";
     return(1);
   }
-  OutputFilename = uniqueFilename.toString();
+  OutputFilename = uniqueFilename.str();
 
   // set up the input file name
   sys::Path inputFilename("bugpoint-input.bc");
@@ -152,29 +152,26 @@
   
   
   if (!ErrInfo.empty()) {
-    errs() << "Error opening bitcode file: " << inputFilename << "\n";
+    errs() << "Error opening bitcode file: " << inputFilename.str() << "\n";
     return 1;
   }
   WriteBitcodeToFile(Program, InFile);
   InFile.close();
 
   // setup the child process' arguments
-  const char** args = (const char**)
-    alloca(sizeof(const char*) * 
-           (Passes.size()+13+2*PluginLoader::getNumPlugins()+NumExtraArgs));
-  int n = 0;
+  SmallVector<const char*, 8> Args;
   sys::Path tool = sys::Program::FindProgramByName(ToolName);
   if (UseValgrind) {
-    args[n++] = "valgrind";
-    args[n++] = "--error-exitcode=1";
-    args[n++] = "-q";
-    args[n++] = tool.c_str();
+    Args.push_back("valgrind");
+    Args.push_back("--error-exitcode=1");
+    Args.push_back("-q");
+    Args.push_back(tool.c_str());
   } else
-    args[n++] = ToolName;
+    Args.push_back(ToolName);
 
-  args[n++] = "-as-child";
-  args[n++] = "-child-output";
-  args[n++] = OutputFilename.c_str();
+  Args.push_back("-as-child");
+  Args.push_back("-child-output");
+  Args.push_back(OutputFilename.c_str());
   std::vector<std::string> pass_args;
   for (unsigned i = 0, e = PluginLoader::getNumPlugins(); i != e; ++i) {
     pass_args.push_back( std::string("-load"));
@@ -185,11 +182,11 @@
     pass_args.push_back( std::string("-") + (*I)->getPassArgument() );
   for (std::vector<std::string>::const_iterator I = pass_args.begin(),
        E = pass_args.end(); I != E; ++I )
-    args[n++] = I->c_str();
-  args[n++] = inputFilename.c_str();
+    Args.push_back(I->c_str());
+  Args.push_back(inputFilename.c_str());
   for (unsigned i = 0; i < NumExtraArgs; ++i)
-    args[n++] = *ExtraArgs;
-  args[n++] = 0;
+    Args.push_back(*ExtraArgs);
+  Args.push_back(0);
 
   sys::Path prog;
   if (UseValgrind)
@@ -201,7 +198,8 @@
   sys::Path Nowhere;
   const sys::Path *Redirects[3] = {0, &Nowhere, &Nowhere};
 
-  int result = sys::Program::ExecuteAndWait(prog, args, 0, (SilencePasses ? Redirects : 0),
+  int result = sys::Program::ExecuteAndWait(prog, Args.data(), 0,
+                                            (SilencePasses ? Redirects : 0),
                                             Timeout, MemoryLimit, &ErrMsg);
 
   // If we are supposed to delete the bitcode file or if the passes crashed,
diff --git a/tools/bugpoint/ToolRunner.cpp b/tools/bugpoint/ToolRunner.cpp
index 01afc20..e3e1cae 100644
--- a/tools/bugpoint/ToolRunner.cpp
+++ b/tools/bugpoint/ToolRunner.cpp
@@ -13,11 +13,12 @@
 
 #define DEBUG_TYPE "toolrunner"
 #include "ToolRunner.h"
-#include "llvm/Config/config.h"   // for HAVE_LINK_R
 #include "llvm/System/Program.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/FileUtilities.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Config/config.h"   // for HAVE_LINK_R
 #include <fstream>
 #include <sstream>
 using namespace llvm;
@@ -232,7 +233,7 @@
                                                     std::string &Message,
                                      const std::vector<std::string> *ToolArgs) {
   std::string LLIPath =
-    FindExecutable("lli", Argv0, (void *)(intptr_t)&createLLI).toString();
+    FindExecutable("lli", Argv0, (void *)(intptr_t)&createLLI).str();
   if (!LLIPath.empty()) {
     Message = "Found lli: " + LLIPath + "\n";
     return new LLI(LLIPath, ToolArgs);
@@ -332,7 +333,7 @@
     pos = ExecCommandLine.find_first_of(delimiters, lastPos);
   }
 
-  std::string CmdPath = sys::Program::FindProgramByName(Command).toString();
+  std::string CmdPath = sys::Program::FindProgramByName(Command).str();
   if (CmdPath.empty()) {
     Message = 
       std::string("Cannot find '") + Command + 
@@ -407,7 +408,7 @@
   GCCArgs.insert(GCCArgs.end(), gccArgs.begin(), gccArgs.end());
 
   // Assuming LLC worked, compile the result with GCC and run it.
-  return gcc->ExecuteProgram(OutputAsmFile.toString(), Args, GCC::AsmFile,
+  return gcc->ExecuteProgram(OutputAsmFile.str(), Args, GCC::AsmFile,
                              InputFile, OutputFile, GCCArgs,
                              Timeout, MemoryLimit);
 }
@@ -419,7 +420,7 @@
                                     const std::vector<std::string> *Args,
                                     const std::vector<std::string> *GCCArgs) {
   std::string LLCPath =
-    FindExecutable("llc", Argv0, (void *)(intptr_t)&createLLC).toString();
+    FindExecutable("llc", Argv0, (void *)(intptr_t)&createLLC).str();
   if (LLCPath.empty()) {
     Message = "Cannot find `llc' in executable directory or PATH!\n";
     return 0;
@@ -505,7 +506,7 @@
 AbstractInterpreter *AbstractInterpreter::createJIT(const char *Argv0,
                    std::string &Message, const std::vector<std::string> *Args) {
   std::string LLIPath =
-    FindExecutable("lli", Argv0, (void *)(intptr_t)&createJIT).toString();
+    FindExecutable("lli", Argv0, (void *)(intptr_t)&createJIT).str();
   if (!LLIPath.empty()) {
     Message = "Found lli: " + LLIPath + "\n";
     return new JIT(LLIPath, Args);
@@ -572,7 +573,7 @@
   std::vector<std::string> GCCArgs(ArgsForGCC);
   GCCArgs.insert(GCCArgs.end(), SharedLibs.begin(), SharedLibs.end());
 
-  return gcc->ExecuteProgram(OutputCFile.toString(), Args, GCC::CFile,
+  return gcc->ExecuteProgram(OutputCFile.str(), Args, GCC::CFile,
                              InputFile, OutputFile, GCCArgs,
                              Timeout, MemoryLimit);
 }
@@ -591,7 +592,7 @@
     return 0;
   }
 
-  Message = "Found llc: " + LLCPath.toString() + "\n";
+  Message = "Found llc: " + LLCPath.str() + "\n";
   GCC *gcc = GCC::create(Message, GCCArgs);
   if (!gcc) {
     errs() << Message << "\n";
@@ -757,7 +758,7 @@
     errs() << "Error making unique filename: " << ErrMsg << "\n";
     exit(1);
   }
-  OutputFile = uniqueFilename.toString();
+  OutputFile = uniqueFilename.str();
 
   std::vector<const char*> GCCArgs;
   
@@ -839,6 +840,6 @@
   if (!RemoteClient.empty())
     RemoteClientPath = sys::Program::FindProgramByName(RemoteClient);
 
-  Message = "Found gcc: " + GCCPath.toString() + "\n";
+  Message = "Found gcc: " + GCCPath.str() + "\n";
   return new GCC(GCCPath, RemoteClientPath, Args);
 }
diff --git a/tools/lli/lli.cpp b/tools/lli/lli.cpp
index 9c8cc6c..e5c1070 100644
--- a/tools/lli/lli.cpp
+++ b/tools/lli/lli.cpp
@@ -28,6 +28,7 @@
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/PluginLoader.h"
 #include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/raw_ostream.h"
 #include "llvm/System/Process.h"
 #include "llvm/System/Signals.h"
 #include "llvm/Target/TargetSelect.h"
diff --git a/tools/llvm-ar/llvm-ar.cpp b/tools/llvm-ar/llvm-ar.cpp
index c31f86e..95957df 100644
--- a/tools/llvm-ar/llvm-ar.cpp
+++ b/tools/llvm-ar/llvm-ar.cpp
@@ -364,7 +364,7 @@
           continue;
 
         if (Verbose)
-          std::cout << "Printing " << I->getPath().toString() << "\n";
+          std::cout << "Printing " << I->getPath().str() << "\n";
 
         unsigned len = I->getSize();
         std::cout.write(data, len);
@@ -422,11 +422,10 @@
         std::cout << " " << std::setw(4) << I->getUser();
         std::cout << "/" << std::setw(4) << I->getGroup();
         std::cout << " " << std::setw(8) << I->getSize();
-        std::cout << " " << std::setw(20) <<
-          I->getModTime().toString().substr(4);
-        std::cout << " " << I->getPath().toString() << "\n";
+        std::cout << " " << std::setw(20) << I->getModTime().str().substr(4);
+        std::cout << " " << I->getPath().str() << "\n";
       } else {
-        std::cout << I->getPath().toString() << "\n";
+        std::cout << I->getPath().str() << "\n";
       }
     }
   }
@@ -528,7 +527,7 @@
   if (AddBefore || InsertBefore || AddAfter) {
     for (Archive::iterator I = TheArchive->begin(), E= TheArchive->end();
          I != E; ++I ) {
-      if (RelPos == I->getPath().toString()) {
+      if (RelPos == I->getPath().str()) {
         if (AddAfter) {
           moveto_spot = I;
           moveto_spot++;
@@ -616,7 +615,7 @@
     std::set<sys::Path>::iterator found = remaining.end();
     for (std::set<sys::Path>::iterator RI = remaining.begin(),
          RE = remaining.end(); RI != RE; ++RI ) {
-      std::string compare(RI->toString());
+      std::string compare(RI->str());
       if (TruncateNames && compare.length() > 15) {
         const char* nm = compare.c_str();
         unsigned len = compare.length();
@@ -629,7 +628,7 @@
           len = 15;
         compare.assign(nm,len);
       }
-      if (compare == I->getPath().toString()) {
+      if (compare == I->getPath().str()) {
         found = RI;
         break;
       }
@@ -661,9 +660,9 @@
     }
 
     // Determine if this is the place where we should insert
-    if ((AddBefore || InsertBefore) && (RelPos == I->getPath().toString()))
+    if ((AddBefore || InsertBefore) && RelPos == I->getPath().str())
       insert_spot = I;
-    else if (AddAfter && (RelPos == I->getPath().toString())) {
+    else if (AddAfter && RelPos == I->getPath().str()) {
       insert_spot = I;
       insert_spot++;
     }
@@ -719,14 +718,14 @@
     if (!ArchivePath.exists()) {
       // Produce a warning if we should and we're creating the archive
       if (!Create)
-        errs() << argv[0] << ": creating " << ArchivePath.toString() << "\n";
+        errs() << argv[0] << ": creating " << ArchivePath.str() << "\n";
       TheArchive = Archive::CreateEmpty(ArchivePath, Context);
       TheArchive->writeToDisk();
     } else {
       std::string Error;
       TheArchive = Archive::OpenAndLoad(ArchivePath, Context, &Error);
       if (TheArchive == 0) {
-        errs() << argv[0] << ": error loading '" << ArchivePath << "': "
+        errs() << argv[0] << ": error loading '" << ArchivePath.str() << "': "
                << Error << "!\n";
         return 1;
       }
diff --git a/tools/llvm-bcanalyzer/llvm-bcanalyzer.cpp b/tools/llvm-bcanalyzer/llvm-bcanalyzer.cpp
index db9b131..7a8feca 100644
--- a/tools/llvm-bcanalyzer/llvm-bcanalyzer.cpp
+++ b/tools/llvm-bcanalyzer/llvm-bcanalyzer.cpp
@@ -35,6 +35,7 @@
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/raw_ostream.h"
 #include "llvm/System/Signals.h"
 #include <map>
 #include <algorithm>
diff --git a/tools/llvm-db/Commands.cpp b/tools/llvm-db/Commands.cpp
index bd741a5..d759ddd 100644
--- a/tools/llvm-db/Commands.cpp
+++ b/tools/llvm-db/Commands.cpp
@@ -19,8 +19,8 @@
 #include "llvm/Debugger/SourceFile.h"
 #include "llvm/Debugger/InferiorProcess.h"
 #include "llvm/Support/FileUtilities.h"
+#include "llvm/Support/raw_ostream.h"
 #include "llvm/ADT/StringExtras.h"
-#include <iostream>
 #include <cstdlib>
 using namespace llvm;
 
@@ -56,7 +56,7 @@
   if (!Status)
     throw Err;
   if (TheProgramInfo->getProgramTimeStamp() != Status->getTimestamp()) {
-    std::cout << "'" << Program << "' has changed; re-reading program.\n";
+    outs() << "'" << Program.str() << "' has changed; re-reading program.\n";
 
     // Unload an existing program.  This kills the program if necessary.
     Dbg.unloadProgram();
@@ -64,11 +64,11 @@
     TheProgramInfo = 0;
     CurrentFile = 0;
 
-    Dbg.loadProgram(Program.toString(), Context);
+    Dbg.loadProgram(Program.str(), Context);
     TheProgramInfo = new ProgramInfo(Dbg.getProgram());
   }
 
-  std::cout << "Starting program: " << Dbg.getProgramPath() << "\n";
+  outs() << "Starting program: " << Dbg.getProgramPath() << "\n";
   Dbg.createProgram();
 
   // There was no current frame.
@@ -83,7 +83,7 @@
   const char *LineStart, *LineEnd;
   CurrentFile->getSourceLine(LineNo-1, LineStart, LineEnd);
   if (LineStart == 0) return true;
-  std::cout << LineNo;
+  outs() << LineNo;
 
   // If this is the line the program is currently stopped at, print a marker.
   if (Dbg.isProgramRunning()) {
@@ -93,10 +93,10 @@
                                                          CurSFI);
 
     if (CurLineNo == LineNo && CurrentFile == &CurSFI->getSourceText())
-      std::cout << " ->";
+      outs() << " ->";
   }
 
-  std::cout << "\t" << std::string(LineStart, LineEnd) << "\n";
+  outs() << "\t" << std::string(LineStart, LineEnd) << "\n";
   return false;
 }
 
@@ -117,19 +117,19 @@
   if (PrintLocation) {
     // FIXME: print the current function arguments
     if (const GlobalVariable *FuncDesc = SF.getFunctionDesc())
-      std::cout << getProgramInfo().getFunction(FuncDesc).getSymbolicName();
+      outs() << getProgramInfo().getFunction(FuncDesc).getSymbolicName();
     else
-      std::cout << "<unknown function>";
+      outs() << "<unknown function>";
 
     CurrentFile = &FileDesc->getSourceText();
 
-    std::cout << " at " << CurrentFile->getFilename() << ":" << LineNo;
-    if (ColNo) std::cout << ":" << ColNo;
-    std::cout << "\n";
+    outs() << " at " << CurrentFile->getFilename() << ":" << LineNo;
+    if (ColNo) outs() << ":" << ColNo;
+    outs() << "\n";
   }
 
   if (printSourceLine(LineNo))
-    std::cout << "<could not load source file>\n";
+    outs() << "<could not load source file>\n";
   else {
     LineListedStart = LineNo-ListSize/2+1;
     if ((int)LineListedStart < 1) LineListedStart = 1;
@@ -241,14 +241,15 @@
 
   // If requested, start the new program.
   if (Prog.empty()) {
-    std::cout << "Unloaded program.\n";
+    outs() << "Unloaded program.\n";
   } else {
-    std::cout << "Loading program... " << std::flush;
+    outs() << "Loading program... ";
+    outs().flush();
     Dbg.loadProgram(Prog, Context);
     assert(Dbg.isProgramLoaded() &&
            "loadProgram succeeded, but not program loaded!");
     TheProgramInfo = new ProgramInfo(Dbg.getProgram());
-    std::cout << "successfully loaded '" << Dbg.getProgramPath() << "'!\n";
+    outs() << "successfully loaded '" << Dbg.getProgramPath() << "'!\n";
   }
 }
 
@@ -391,29 +392,29 @@
   try {
     for (unsigned i = 0; ; ++i) {
       StackFrame &SF = RI.getStackFrame(i);
-      std::cout << "#" << i;
+      outs() << "#" << i;
       if (i == RI.getCurrentFrameIdx())
-        std::cout << " ->";
-      std::cout << "\t" << SF.getFrameID() << " in ";
+        outs() << " ->";
+      outs() << "\t" << SF.getFrameID() << " in ";
       if (const GlobalVariable *G = SF.getFunctionDesc())
-        std::cout << PI.getFunction(G).getSymbolicName();
+        outs() << PI.getFunction(G).getSymbolicName();
 
       unsigned LineNo, ColNo;
       const SourceFileInfo *SFI;
       SF.getSourceLocation(LineNo, ColNo, SFI);
       if (!SFI->getBaseName().empty()) {
-        std::cout << " at " << SFI->getBaseName();
+        outs() << " at " << SFI->getBaseName();
         if (LineNo) {
-          std::cout << ":" << LineNo;
+          outs() << ":" << LineNo;
           if (ColNo)
-            std::cout << ":" << ColNo;
+            outs() << ":" << ColNo;
         }
       }
 
       // FIXME: when we support shared libraries, we should print ' from foo.so'
       // if the stack frame is from a different object than the current one.
 
-      std::cout << "\n";
+      outs() << "\n";
     }
   } catch (...) {
     // Stop automatically when we run off the bottom of the stack.
@@ -522,11 +523,11 @@
   } else if (What == "functions") {
     const std::map<const GlobalVariable*, SourceFunctionInfo*> &Functions
       = getProgramInfo().getSourceFunctions();
-    std::cout << "All defined functions:\n";
+    outs() << "All defined functions:\n";
     // FIXME: GDB groups these by source file.  We could do that I guess.
     for (std::map<const GlobalVariable*, SourceFunctionInfo*>::const_iterator
            I = Functions.begin(), E = Functions.end(); I != E; ++I) {
-      std::cout << I->second->getSymbolicName() << "\n";
+      outs() << I->second->getSymbolicName() << "\n";
     }
 
   } else if (What == "source") {
@@ -537,30 +538,30 @@
     const SourceFileInfo &SF =
       getProgramInfo().getSourceFile(CurrentFile->getDescriptor());
 
-    std::cout << "Current source file is: " << SF.getBaseName() << "\n"
-              << "Compilation directory is: " << SF.getDirectory() << "\n";
+    outs() << "Current source file is: " << SF.getBaseName() << "\n"
+            << "Compilation directory is: " << SF.getDirectory() << "\n";
     if (unsigned NL = CurrentFile->getNumLines())
-      std::cout << "Located in: " << CurrentFile->getFilename() << "\n"
-                << "Contains " << NL << " lines\n";
+      outs() << "Located in: " << CurrentFile->getFilename() << "\n"
+              << "Contains " << NL << " lines\n";
     else
-      std::cout << "Could not find source file.\n";
-    std::cout << "Source language is "
-              << SF.getLanguage().getSourceLanguageName() << "\n";
+      outs() << "Could not find source file.\n";
+    outs() << "Source language is "
+           << SF.getLanguage().getSourceLanguageName() << "\n";
 
   } else if (What == "sources") {
     const std::map<const GlobalVariable*, SourceFileInfo*> &SourceFiles =
       getProgramInfo().getSourceFiles();
-    std::cout << "Source files for the program:\n";
+    outs() << "Source files for the program:\n";
     for (std::map<const GlobalVariable*, SourceFileInfo*>::const_iterator I =
            SourceFiles.begin(), E = SourceFiles.end(); I != E;) {
-      std::cout << I->second->getDirectory() << "/"
-                << I->second->getBaseName();
+      outs() << I->second->getDirectory() << "/"
+             << I->second->getBaseName();
       ++I;
-      if (I != E) std::cout << ", ";
+      if (I != E) outs() << ", ";
     }
-    std::cout << "\n";
+    outs() << "\n";
   } else if (What == "target") {
-    std::cout << Dbg.getRunningProcess().getStatus();
+    outs() << Dbg.getRunningProcess().getStatus();
   } else {
     // See if this is something handled by the current language.
     if (getCurrentLanguage().printInfo(What))
@@ -746,7 +747,7 @@
     if (LineStart == 0)
       throw "Could not load source file '" + CurrentFile->getFilename() + "'!";
     else
-      std::cout << "<end of file>\n";
+      outs() << "<end of file>\n";
   }
 }
 
@@ -762,11 +763,11 @@
     if (!getToken(Options).empty())
       throw "set language expects one argument at most.";
     if (Lang == "") {
-      std::cout << "The currently understood settings are:\n\n"
-                << "local or auto  Automatic setting based on source file\n"
-                << "c              Use the C language\n"
-                << "c++            Use the C++ language\n"
-                << "unknown        Use when source language is not supported\n";
+      outs() << "The currently understood settings are:\n\n"
+             << "local or auto  Automatic setting based on source file\n"
+             << "c              Use the C language\n"
+             << "c++            Use the C++ language\n"
+             << "unknown        Use when source language is not supported\n";
     } else if (Lang == "local" || Lang == "auto") {
       CurrentLanguage = 0;
     } else if (Lang == "c") {
@@ -799,28 +800,28 @@
     throw "show command expects one argument.";
 
   if (What == "args") {
-    std::cout << "Argument list to give program when started is \"";
+    outs() << "Argument list to give program when started is \"";
     // FIXME: This doesn't print stuff correctly if the arguments have spaces in
     // them, but currently the only way to get that is to use the --args command
     // line argument.  This should really handle escaping all hard characters as
     // needed.
     for (unsigned i = 0, e = Dbg.getNumProgramArguments(); i != e; ++i)
-      std::cout << (i ? " " : "") << Dbg.getProgramArgument(i);
-    std::cout << "\"\n";
+      outs() << (i ? " " : "") << Dbg.getProgramArgument(i);
+    outs() << "\"\n";
 
   } else if (What == "language") {
-    std::cout << "The current source language is '";
+    outs() << "The current source language is '";
     if (CurrentLanguage)
-      std::cout << CurrentLanguage->getSourceLanguageName();
+      outs() << CurrentLanguage->getSourceLanguageName();
     else
-      std::cout << "auto; currently "
-                << getCurrentLanguage().getSourceLanguageName();
-    std::cout << "'.\n";
+      outs() << "auto; currently "
+             << getCurrentLanguage().getSourceLanguageName();
+    outs() << "'.\n";
   } else if (What == "listsize") {
-    std::cout << "Number of source lines llvm-db will list by default is "
-              << ListSize << ".\n";
+    outs() << "Number of source lines llvm-db will list by default is "
+           << ListSize << ".\n";
   } else if (What == "prompt") {
-    std::cout << "llvm-db's prompt is \"" << Prompt << "\".\n";
+    outs() << "llvm-db's prompt is \"" << Prompt << "\".\n";
   } else {
     throw "Unknown show command '" + What + "'.  Try 'help show'.";
   }
@@ -835,16 +836,16 @@
   // Getting detailed help on a particular command?
   if (!Command.empty()) {
     CLICommand *C = getCommand(Command);
-    std::cout << C->getShortHelp() << ".\n" << C->getLongHelp();
+    outs() << C->getShortHelp() << ".\n" << C->getLongHelp();
 
     // If there are aliases for this option, print them out.
     const std::vector<std::string> &Names = C->getOptionNames();
     if (Names.size() > 1) {
-      std::cout << "The '" << Command << "' command is known as: '"
-                << Names[0] << "'";
+      outs() << "The '" << Command << "' command is known as: '"
+             << Names[0] << "'";
       for (unsigned i = 1, e = Names.size(); i != e; ++i)
-        std::cout << ", '" << Names[i] << "'";
-      std::cout << "\n";
+        outs() << ", '" << Names[i] << "'";
+      outs() << "\n";
     }
 
   } else {
@@ -859,7 +860,7 @@
     for (std::map<std::string, CLICommand*>::iterator I = CommandTable.begin(),
            E = CommandTable.end(); I != E; ++I)
       if (I->first == I->second->getPrimaryOptionName())
-        std::cout << I->first << std::string(MaxSize - I->first.size(), ' ')
-                  << " - " << I->second->getShortHelp() << "\n";
+        outs() << I->first << std::string(MaxSize - I->first.size(), ' ')
+               << " - " << I->second->getShortHelp() << "\n";
   }
 }
diff --git a/tools/llvm-db/llvm-db.cpp b/tools/llvm-db/llvm-db.cpp
index 8fb9b58..463a1bd 100644
--- a/tools/llvm-db/llvm-db.cpp
+++ b/tools/llvm-db/llvm-db.cpp
@@ -17,8 +17,8 @@
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/raw_ostream.h"
 #include "llvm/System/Signals.h"
-#include <iostream>
 using namespace llvm;
 
 namespace {
@@ -57,13 +57,13 @@
   
   LLVMContext &Context = getGlobalContext();
   llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.
-  std::cout << "NOTE: llvm-db is known useless right now.\n";
+  outs() << "NOTE: llvm-db is known useless right now.\n";
   try {
     cl::ParseCommandLineOptions(argc, argv,
                                 "llvm source-level debugger\n");
 
     if (!Quiet)
-      std::cout << "llvm-db: The LLVM source-level debugger\n";
+      outs() << "llvm-db: The LLVM source-level debugger\n";
 
     // Merge Inputfile and InputArgs into the InputArgs list...
     if (!InputFile.empty() && InputArgs.empty())
@@ -85,7 +85,7 @@
       try {
         D.fileCommand(InputArgs[0]);
       } catch (const std::string &Error) {
-        std::cout << "Error: " << Error << "\n";
+        outs() << "Error: " << Error << "\n";
       }
 
       Dbg.setProgramArguments(InputArgs.begin()+1, InputArgs.end());
diff --git a/tools/llvm-ld/llvm-ld.cpp b/tools/llvm-ld/llvm-ld.cpp
index f789b15..8fcaefd 100644
--- a/tools/llvm-ld/llvm-ld.cpp
+++ b/tools/llvm-ld/llvm-ld.cpp
@@ -35,6 +35,7 @@
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/PrettyStackTrace.h"
 #include "llvm/Support/SystemUtils.h"
+#include "llvm/Support/raw_ostream.h"
 #include "llvm/System/Signals.h"
 #include "llvm/Config/config.h"
 #include <memory>
@@ -466,7 +467,7 @@
     if (FullLibraryPath.isEmpty())
       FullLibraryPath = sys::Path::FindLibrary(*i);
     if (!FullLibraryPath.isEmpty())
-      Out2 << "    -load=" << FullLibraryPath.toString() << " \\\n";
+      Out2 << "    -load=" << FullLibraryPath.str() << " \\\n";
   }
   Out2 << "    "  << BitcodeOutputFilename << " ${1+\"$@\"}\n";
   Out2.close();
@@ -572,7 +573,7 @@
       sys::Path ExeFile( OutputFilename );
       if (ExeFile.getSuffix() == "") {
         ExeFile.appendSuffix("exe");
-        OutputFilename = ExeFile.toString();
+        OutputFilename = ExeFile.str();
       }
     }
 #endif
@@ -652,11 +653,11 @@
 
         // Generate an assembly language file for the bitcode.
         std::string ErrMsg;
-        if (0 != GenerateAssembly(AssemblyFile.toString(), BitcodeOutputFilename,
+        if (0 != GenerateAssembly(AssemblyFile.str(), BitcodeOutputFilename,
             llc, ErrMsg))
           PrintAndExit(ErrMsg);
 
-        if (0 != GenerateNative(OutputFilename, AssemblyFile.toString(),
+        if (0 != GenerateNative(OutputFilename, AssemblyFile.str(),
                                 NativeLinkItems, gcc, envp, ErrMsg))
           PrintAndExit(ErrMsg);
 
@@ -682,12 +683,11 @@
 
         // Generate an assembly language file for the bitcode.
         std::string ErrMsg;
-        if (0 != GenerateCFile(
-            CFile.toString(), BitcodeOutputFilename, llc, ErrMsg))
+        if (GenerateCFile(CFile.str(), BitcodeOutputFilename, llc, ErrMsg))
           PrintAndExit(ErrMsg);
 
-        if (0 != GenerateNative(OutputFilename, CFile.toString(), 
-                                NativeLinkItems, gcc, envp, ErrMsg))
+        if (GenerateNative(OutputFilename, CFile.str(), 
+                           NativeLinkItems, gcc, envp, ErrMsg))
           PrintAndExit(ErrMsg);
 
         // Remove the assembly language file.
diff --git a/tools/llvm-link/llvm-link.cpp b/tools/llvm-link/llvm-link.cpp
index cebfec3..6dc04e6 100644
--- a/tools/llvm-link/llvm-link.cpp
+++ b/tools/llvm-link/llvm-link.cpp
@@ -21,6 +21,7 @@
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/raw_ostream.h"
 #include "llvm/System/Signals.h"
 #include "llvm/System/Path.h"
 #include <memory>
@@ -58,7 +59,7 @@
     if (Verbose) errs() << "Loading '" << Filename.c_str() << "'\n";
     Module* Result = 0;
     
-    const std::string &FNStr = Filename.toString();
+    const std::string &FNStr = Filename.str();
     if (MemoryBuffer *Buffer = MemoryBuffer::getFileOrSTDIN(FNStr,
                                                             &ErrorMessage)) {
       Result = ParseBitcodeFile(Buffer, Context, &ErrorMessage);
diff --git a/tools/lto/LTOCodeGenerator.cpp b/tools/lto/LTOCodeGenerator.cpp
index e868ee3..4bd754c 100644
--- a/tools/lto/LTOCodeGenerator.cpp
+++ b/tools/lto/LTOCodeGenerator.cpp
@@ -202,9 +202,8 @@
     sys::RemoveFileOnSignal(uniqueObjPath);
 
     // assemble the assembly code
-    const std::string& uniqueObjStr = uniqueObjPath.toString();
-    bool asmResult = this->assemble(uniqueAsmPath.toString(), 
-                                                        uniqueObjStr, errMsg);
+    const std::string& uniqueObjStr = uniqueObjPath.str();
+    bool asmResult = this->assemble(uniqueAsmPath.str(), uniqueObjStr, errMsg);
     if ( !asmResult ) {
         // remove old buffer if compile() called twice
         delete _nativeObjectFile;
diff --git a/utils/TableGen/LLVMCConfigurationEmitter.cpp b/utils/TableGen/LLVMCConfigurationEmitter.cpp
index b27ac43..6bade9b 100644
--- a/utils/TableGen/LLVMCConfigurationEmitter.cpp
+++ b/utils/TableGen/LLVMCConfigurationEmitter.cpp
@@ -1330,9 +1330,9 @@
           O << "for (PathVector::const_iterator B = inFiles.begin()"
             << ", E = inFiles.end();\n"
             << IndentLevel << "B != E; ++B)\n"
-            << IndentLevel << Indent1 << "vec.push_back(B->toString());\n";
+            << IndentLevel << Indent1 << "vec.push_back(B->str());\n";
         else
-          O << "vec.push_back(inFile.toString());\n";
+          O << "vec.push_back(inFile.str());\n";
       }
       else if (cmd == "$OUTFILE") {
         O << "vec.push_back(out_file);\n";
@@ -1556,7 +1556,7 @@
 
   O << '\n' << Indent2
     << "out_file = OutFilename(" << (IsJoin ? "sys::Path(),\n" : "inFile,\n")
-    << Indent3 << "TempDir, stop_compilation, output_suffix).toString();\n\n";
+    << Indent3 << "TempDir, stop_compilation, output_suffix).str();\n\n";
 
   // cmd_line is either a string or a 'case' construct.
   if (!D.CmdLine)