diff --git a/Lex/Directives.cpp b/Lex/PPDirectives.cpp
similarity index 99%
rename from Lex/Directives.cpp
rename to Lex/PPDirectives.cpp
index 979c3c7..2871e30 100644
--- a/Lex/Directives.cpp
+++ b/Lex/PPDirectives.cpp
@@ -1,4 +1,4 @@
-//===--- Directives.cpp - Directive Handling for Preprocessor -------------===//
+//===--- PPDirectives.cpp - Directive Handling for Preprocessor -----------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
diff --git a/Lex/PPMacroExpansion.cpp b/Lex/PPMacroExpansion.cpp
new file mode 100644
index 0000000..8218d0a
--- /dev/null
+++ b/Lex/PPMacroExpansion.cpp
@@ -0,0 +1,523 @@
+//===--- MacroExpansion.cpp - Top level Macro Expansion -------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the top level handling of macro expasion for the
+// preprocessor.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Lex/Preprocessor.h"
+#include "MacroArgs.h"
+#include "clang/Lex/MacroInfo.h"
+#include "clang/Basic/SourceManager.h"
+#include "clang/Basic/FileManager.h"
+#include "clang/Basic/Diagnostic.h"
+using namespace clang;
+
+/// setMacroInfo - Specify a macro for this identifier.
+///
+void Preprocessor::setMacroInfo(IdentifierInfo *II, MacroInfo *MI) {
+  if (MI == 0) {
+    if (II->hasMacroDefinition()) {
+      Macros.erase(II);
+      II->setHasMacroDefinition(false);
+    }
+  } else {
+    Macros[II] = MI;
+    II->setHasMacroDefinition(true);
+  }
+}
+
+/// RegisterBuiltinMacro - Register the specified identifier in the identifier
+/// table and mark it as a builtin macro to be expanded.
+IdentifierInfo *Preprocessor::RegisterBuiltinMacro(const char *Name) {
+  // Get the identifier.
+  IdentifierInfo *Id = getIdentifierInfo(Name);
+  
+  // Mark it as being a macro that is builtin.
+  MacroInfo *MI = new MacroInfo(SourceLocation());
+  MI->setIsBuiltinMacro();
+  setMacroInfo(Id, MI);
+  return Id;
+}
+
+
+/// RegisterBuiltinMacros - Register builtin macros, such as __LINE__ with the
+/// identifier table.
+void Preprocessor::RegisterBuiltinMacros() {
+  Ident__LINE__ = RegisterBuiltinMacro("__LINE__");
+  Ident__FILE__ = RegisterBuiltinMacro("__FILE__");
+  Ident__DATE__ = RegisterBuiltinMacro("__DATE__");
+  Ident__TIME__ = RegisterBuiltinMacro("__TIME__");
+  Ident_Pragma  = RegisterBuiltinMacro("_Pragma");
+  
+  // GCC Extensions.
+  Ident__BASE_FILE__     = RegisterBuiltinMacro("__BASE_FILE__");
+  Ident__INCLUDE_LEVEL__ = RegisterBuiltinMacro("__INCLUDE_LEVEL__");
+  Ident__TIMESTAMP__     = RegisterBuiltinMacro("__TIMESTAMP__");
+}
+
+/// isTrivialSingleTokenExpansion - Return true if MI, which has a single token
+/// in its expansion, currently expands to that token literally.
+static bool isTrivialSingleTokenExpansion(const MacroInfo *MI,
+                                          const IdentifierInfo *MacroIdent,
+                                          Preprocessor &PP) {
+  IdentifierInfo *II = MI->getReplacementToken(0).getIdentifierInfo();
+
+  // If the token isn't an identifier, it's always literally expanded.
+  if (II == 0) return true;
+  
+  // If the identifier is a macro, and if that macro is enabled, it may be
+  // expanded so it's not a trivial expansion.
+  if (II->hasMacroDefinition() && PP.getMacroInfo(II)->isEnabled() &&
+      // Fast expanding "#define X X" is ok, because X would be disabled.
+      II != MacroIdent)
+    return false;
+  
+  // If this is an object-like macro invocation, it is safe to trivially expand
+  // it.
+  if (MI->isObjectLike()) return true;
+
+  // If this is a function-like macro invocation, it's safe to trivially expand
+  // as long as the identifier is not a macro argument.
+  for (MacroInfo::arg_iterator I = MI->arg_begin(), E = MI->arg_end();
+       I != E; ++I)
+    if (*I == II)
+      return false;   // Identifier is a macro argument.
+  
+  return true;
+}
+
+
+/// isNextPPTokenLParen - Determine whether the next preprocessor token to be
+/// lexed is a '('.  If so, consume the token and return true, if not, this
+/// method should have no observable side-effect on the lexed tokens.
+bool Preprocessor::isNextPPTokenLParen() {
+  // Do some quick tests for rejection cases.
+  unsigned Val;
+  if (CurLexer)
+    Val = CurLexer->isNextPPTokenLParen();
+  else
+    Val = CurTokenLexer->isNextTokenLParen();
+  
+  if (Val == 2) {
+    // We have run off the end.  If it's a source file we don't
+    // examine enclosing ones (C99 5.1.1.2p4).  Otherwise walk up the
+    // macro stack.
+    if (CurLexer)
+      return false;
+    for (unsigned i = IncludeMacroStack.size(); i != 0; --i) {
+      IncludeStackInfo &Entry = IncludeMacroStack[i-1];
+      if (Entry.TheLexer)
+        Val = Entry.TheLexer->isNextPPTokenLParen();
+      else
+        Val = Entry.TheTokenLexer->isNextTokenLParen();
+      
+      if (Val != 2)
+        break;
+      
+      // Ran off the end of a source file?
+      if (Entry.TheLexer)
+        return false;
+    }
+  }
+
+  // Okay, if we know that the token is a '(', lex it and return.  Otherwise we
+  // have found something that isn't a '(' or we found the end of the
+  // translation unit.  In either case, return false.
+  if (Val != 1)
+    return false;
+  
+  Token Tok;
+  LexUnexpandedToken(Tok);
+  assert(Tok.is(tok::l_paren) && "Error computing l-paren-ness?");
+  return true;
+}
+
+/// HandleMacroExpandedIdentifier - If an identifier token is read that is to be
+/// expanded as a macro, handle it and return the next token as 'Identifier'.
+bool Preprocessor::HandleMacroExpandedIdentifier(Token &Identifier, 
+                                                 MacroInfo *MI) {
+  // If this is a macro exapnsion in the "#if !defined(x)" line for the file,
+  // then the macro could expand to different things in other contexts, we need
+  // to disable the optimization in this case.
+  if (CurLexer) CurLexer->MIOpt.ExpandedMacro();
+  
+  // If this is a builtin macro, like __LINE__ or _Pragma, handle it specially.
+  if (MI->isBuiltinMacro()) {
+    ExpandBuiltinMacro(Identifier);
+    return false;
+  }
+  
+  /// Args - If this is a function-like macro expansion, this contains,
+  /// for each macro argument, the list of tokens that were provided to the
+  /// invocation.
+  MacroArgs *Args = 0;
+  
+  // If this is a function-like macro, read the arguments.
+  if (MI->isFunctionLike()) {
+    // C99 6.10.3p10: If the preprocessing token immediately after the the macro
+    // name isn't a '(', this macro should not be expanded.  Otherwise, consume
+    // it.
+    if (!isNextPPTokenLParen())
+      return true;
+    
+    // Remember that we are now parsing the arguments to a macro invocation.
+    // Preprocessor directives used inside macro arguments are not portable, and
+    // this enables the warning.
+    InMacroArgs = true;
+    Args = ReadFunctionLikeMacroArgs(Identifier, MI);
+    
+    // Finished parsing args.
+    InMacroArgs = false;
+    
+    // If there was an error parsing the arguments, bail out.
+    if (Args == 0) return false;
+    
+    ++NumFnMacroExpanded;
+  } else {
+    ++NumMacroExpanded;
+  }
+  
+  // Notice that this macro has been used.
+  MI->setIsUsed(true);
+  
+  // If we started lexing a macro, enter the macro expansion body.
+  
+  // If this macro expands to no tokens, don't bother to push it onto the
+  // expansion stack, only to take it right back off.
+  if (MI->getNumTokens() == 0) {
+    // No need for arg info.
+    if (Args) Args->destroy();
+    
+    // Ignore this macro use, just return the next token in the current
+    // buffer.
+    bool HadLeadingSpace = Identifier.hasLeadingSpace();
+    bool IsAtStartOfLine = Identifier.isAtStartOfLine();
+    
+    Lex(Identifier);
+    
+    // If the identifier isn't on some OTHER line, inherit the leading
+    // whitespace/first-on-a-line property of this token.  This handles
+    // stuff like "! XX," -> "! ," and "   XX," -> "    ,", when XX is
+    // empty.
+    if (!Identifier.isAtStartOfLine()) {
+      if (IsAtStartOfLine) Identifier.setFlag(Token::StartOfLine);
+      if (HadLeadingSpace) Identifier.setFlag(Token::LeadingSpace);
+    }
+    ++NumFastMacroExpanded;
+    return false;
+    
+  } else if (MI->getNumTokens() == 1 &&
+             isTrivialSingleTokenExpansion(MI, Identifier.getIdentifierInfo(),
+                                           *this)){
+    // Otherwise, if this macro expands into a single trivially-expanded
+    // token: expand it now.  This handles common cases like 
+    // "#define VAL 42".
+    
+    // Propagate the isAtStartOfLine/hasLeadingSpace markers of the macro
+    // identifier to the expanded token.
+    bool isAtStartOfLine = Identifier.isAtStartOfLine();
+    bool hasLeadingSpace = Identifier.hasLeadingSpace();
+    
+    // Remember where the token is instantiated.
+    SourceLocation InstantiateLoc = Identifier.getLocation();
+    
+    // Replace the result token.
+    Identifier = MI->getReplacementToken(0);
+    
+    // Restore the StartOfLine/LeadingSpace markers.
+    Identifier.setFlagValue(Token::StartOfLine , isAtStartOfLine);
+    Identifier.setFlagValue(Token::LeadingSpace, hasLeadingSpace);
+    
+    // Update the tokens location to include both its logical and physical
+    // locations.
+    SourceLocation Loc =
+      SourceMgr.getInstantiationLoc(Identifier.getLocation(), InstantiateLoc);
+    Identifier.setLocation(Loc);
+    
+    // If this is #define X X, we must mark the result as unexpandible.
+    if (IdentifierInfo *NewII = Identifier.getIdentifierInfo())
+      if (getMacroInfo(NewII) == MI)
+        Identifier.setFlag(Token::DisableExpand);
+    
+    // Since this is not an identifier token, it can't be macro expanded, so
+    // we're done.
+    ++NumFastMacroExpanded;
+    return false;
+  }
+  
+  // Start expanding the macro.
+  EnterMacro(Identifier, Args);
+  
+  // Now that the macro is at the top of the include stack, ask the
+  // preprocessor to read the next token from it.
+  Lex(Identifier);
+  return false;
+}
+
+/// ReadFunctionLikeMacroArgs - After reading "MACRO(", this method is
+/// invoked to read all of the actual arguments specified for the macro
+/// invocation.  This returns null on error.
+MacroArgs *Preprocessor::ReadFunctionLikeMacroArgs(Token &MacroName,
+                                                   MacroInfo *MI) {
+  // The number of fixed arguments to parse.
+  unsigned NumFixedArgsLeft = MI->getNumArgs();
+  bool isVariadic = MI->isVariadic();
+  
+  // Outer loop, while there are more arguments, keep reading them.
+  Token Tok;
+  Tok.setKind(tok::comma);
+  --NumFixedArgsLeft;  // Start reading the first arg.
+
+  // ArgTokens - Build up a list of tokens that make up each argument.  Each
+  // argument is separated by an EOF token.  Use a SmallVector so we can avoid
+  // heap allocations in the common case.
+  llvm::SmallVector<Token, 64> ArgTokens;
+
+  unsigned NumActuals = 0;
+  while (Tok.is(tok::comma)) {
+    // C99 6.10.3p11: Keep track of the number of l_parens we have seen.  Note
+    // that we already consumed the first one.
+    unsigned NumParens = 0;
+    
+    while (1) {
+      // Read arguments as unexpanded tokens.  This avoids issues, e.g., where
+      // an argument value in a macro could expand to ',' or '(' or ')'.
+      LexUnexpandedToken(Tok);
+      
+      if (Tok.is(tok::eof) || Tok.is(tok::eom)) { // "#if f(<eof>" & "#if f(\n"
+        Diag(MacroName, diag::err_unterm_macro_invoc);
+        // Do not lose the EOF/EOM.  Return it to the client.
+        MacroName = Tok;
+        return 0;
+      } else if (Tok.is(tok::r_paren)) {
+        // If we found the ) token, the macro arg list is done.
+        if (NumParens-- == 0)
+          break;
+      } else if (Tok.is(tok::l_paren)) {
+        ++NumParens;
+      } else if (Tok.is(tok::comma) && NumParens == 0) {
+        // Comma ends this argument if there are more fixed arguments expected.
+        if (NumFixedArgsLeft)
+          break;
+        
+        // If this is not a variadic macro, too many args were specified.
+        if (!isVariadic) {
+          // Emit the diagnostic at the macro name in case there is a missing ).
+          // Emitting it at the , could be far away from the macro name.
+          Diag(MacroName, diag::err_too_many_args_in_macro_invoc);
+          return 0;
+        }
+        // Otherwise, continue to add the tokens to this variable argument.
+      } else if (Tok.is(tok::comment) && !KeepMacroComments) {
+        // If this is a comment token in the argument list and we're just in
+        // -C mode (not -CC mode), discard the comment.
+        continue;
+      } else if (Tok.is(tok::identifier)) {
+        // Reading macro arguments can cause macros that we are currently
+        // expanding from to be popped off the expansion stack.  Doing so causes
+        // them to be reenabled for expansion.  Here we record whether any
+        // identifiers we lex as macro arguments correspond to disabled macros.
+        // If so, we mark the token as noexpand.  This is a subtle aspect of 
+        // C99 6.10.3.4p2.
+        if (MacroInfo *MI = getMacroInfo(Tok.getIdentifierInfo()))
+          if (!MI->isEnabled())
+            Tok.setFlag(Token::DisableExpand);
+      }
+  
+      ArgTokens.push_back(Tok);
+    }
+
+    // Empty arguments are standard in C99 and supported as an extension in
+    // other modes.
+    if (ArgTokens.empty() && !Features.C99)
+      Diag(Tok, diag::ext_empty_fnmacro_arg);
+    
+    // Add a marker EOF token to the end of the token list for this argument.
+    Token EOFTok;
+    EOFTok.startToken();
+    EOFTok.setKind(tok::eof);
+    EOFTok.setLocation(Tok.getLocation());
+    EOFTok.setLength(0);
+    ArgTokens.push_back(EOFTok);
+    ++NumActuals;
+    --NumFixedArgsLeft;
+  };
+  
+  // Okay, we either found the r_paren.  Check to see if we parsed too few
+  // arguments.
+  unsigned MinArgsExpected = MI->getNumArgs();
+  
+  // See MacroArgs instance var for description of this.
+  bool isVarargsElided = false;
+  
+  if (NumActuals < MinArgsExpected) {
+    // There are several cases where too few arguments is ok, handle them now.
+    if (NumActuals+1 == MinArgsExpected && MI->isVariadic()) {
+      // Varargs where the named vararg parameter is missing: ok as extension.
+      // #define A(x, ...)
+      // A("blah")
+      Diag(Tok, diag::ext_missing_varargs_arg);
+
+      // Remember this occurred if this is a C99 macro invocation with at least
+      // one actual argument.
+      isVarargsElided = MI->isC99Varargs() && MI->getNumArgs() > 1;
+    } else if (MI->getNumArgs() == 1) {
+      // #define A(x)
+      //   A()
+      // is ok because it is an empty argument.
+      
+      // Empty arguments are standard in C99 and supported as an extension in
+      // other modes.
+      if (ArgTokens.empty() && !Features.C99)
+        Diag(Tok, diag::ext_empty_fnmacro_arg);
+    } else {
+      // Otherwise, emit the error.
+      Diag(Tok, diag::err_too_few_args_in_macro_invoc);
+      return 0;
+    }
+    
+    // Add a marker EOF token to the end of the token list for this argument.
+    SourceLocation EndLoc = Tok.getLocation();
+    Tok.startToken();
+    Tok.setKind(tok::eof);
+    Tok.setLocation(EndLoc);
+    Tok.setLength(0);
+    ArgTokens.push_back(Tok);
+  }
+  
+  return MacroArgs::create(MI, &ArgTokens[0], ArgTokens.size(),isVarargsElided);
+}
+
+/// ComputeDATE_TIME - Compute the current time, enter it into the specified
+/// scratch buffer, then return DATELoc/TIMELoc locations with the position of
+/// the identifier tokens inserted.
+static void ComputeDATE_TIME(SourceLocation &DATELoc, SourceLocation &TIMELoc,
+                             Preprocessor &PP) {
+  time_t TT = time(0);
+  struct tm *TM = localtime(&TT);
+  
+  static const char * const Months[] = {
+    "Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"
+  };
+  
+  char TmpBuffer[100];
+  sprintf(TmpBuffer, "\"%s %2d %4d\"", Months[TM->tm_mon], TM->tm_mday, 
+          TM->tm_year+1900);
+  DATELoc = PP.CreateString(TmpBuffer, strlen(TmpBuffer));
+
+  sprintf(TmpBuffer, "\"%02d:%02d:%02d\"", TM->tm_hour, TM->tm_min, TM->tm_sec);
+  TIMELoc = PP.CreateString(TmpBuffer, strlen(TmpBuffer));
+}
+
+/// ExpandBuiltinMacro - If an identifier token is read that is to be expanded
+/// as a builtin macro, handle it and return the next token as 'Tok'.
+void Preprocessor::ExpandBuiltinMacro(Token &Tok) {
+  // Figure out which token this is.
+  IdentifierInfo *II = Tok.getIdentifierInfo();
+  assert(II && "Can't be a macro without id info!");
+  
+  // If this is an _Pragma directive, expand it, invoke the pragma handler, then
+  // lex the token after it.
+  if (II == Ident_Pragma)
+    return Handle_Pragma(Tok);
+  
+  ++NumBuiltinMacroExpanded;
+
+  char TmpBuffer[100];
+
+  // Set up the return result.
+  Tok.setIdentifierInfo(0);
+  Tok.clearFlag(Token::NeedsCleaning);
+  
+  if (II == Ident__LINE__) {
+    // __LINE__ expands to a simple numeric value.
+    sprintf(TmpBuffer, "%u", SourceMgr.getLogicalLineNumber(Tok.getLocation()));
+    unsigned Length = strlen(TmpBuffer);
+    Tok.setKind(tok::numeric_constant);
+    Tok.setLength(Length);
+    Tok.setLocation(CreateString(TmpBuffer, Length, Tok.getLocation()));
+  } else if (II == Ident__FILE__ || II == Ident__BASE_FILE__) {
+    SourceLocation Loc = Tok.getLocation();
+    if (II == Ident__BASE_FILE__) {
+      Diag(Tok, diag::ext_pp_base_file);
+      SourceLocation NextLoc = SourceMgr.getIncludeLoc(Loc);
+      while (NextLoc.isValid()) {
+        Loc = NextLoc;
+        NextLoc = SourceMgr.getIncludeLoc(Loc);
+      }
+    }
+    
+    // Escape this filename.  Turn '\' -> '\\' '"' -> '\"'
+    std::string FN = SourceMgr.getSourceName(SourceMgr.getLogicalLoc(Loc));
+    FN = '"' + Lexer::Stringify(FN) + '"';
+    Tok.setKind(tok::string_literal);
+    Tok.setLength(FN.size());
+    Tok.setLocation(CreateString(&FN[0], FN.size(), Tok.getLocation()));
+  } else if (II == Ident__DATE__) {
+    if (!DATELoc.isValid())
+      ComputeDATE_TIME(DATELoc, TIMELoc, *this);
+    Tok.setKind(tok::string_literal);
+    Tok.setLength(strlen("\"Mmm dd yyyy\""));
+    Tok.setLocation(SourceMgr.getInstantiationLoc(DATELoc, Tok.getLocation()));
+  } else if (II == Ident__TIME__) {
+    if (!TIMELoc.isValid())
+      ComputeDATE_TIME(DATELoc, TIMELoc, *this);
+    Tok.setKind(tok::string_literal);
+    Tok.setLength(strlen("\"hh:mm:ss\""));
+    Tok.setLocation(SourceMgr.getInstantiationLoc(TIMELoc, Tok.getLocation()));
+  } else if (II == Ident__INCLUDE_LEVEL__) {
+    Diag(Tok, diag::ext_pp_include_level);
+
+    // Compute the include depth of this token.
+    unsigned Depth = 0;
+    SourceLocation Loc = SourceMgr.getIncludeLoc(Tok.getLocation());
+    for (; Loc.isValid(); ++Depth)
+      Loc = SourceMgr.getIncludeLoc(Loc);
+    
+    // __INCLUDE_LEVEL__ expands to a simple numeric value.
+    sprintf(TmpBuffer, "%u", Depth);
+    unsigned Length = strlen(TmpBuffer);
+    Tok.setKind(tok::numeric_constant);
+    Tok.setLength(Length);
+    Tok.setLocation(CreateString(TmpBuffer, Length, Tok.getLocation()));
+  } else if (II == Ident__TIMESTAMP__) {
+    // MSVC, ICC, GCC, VisualAge C++ extension.  The generated string should be
+    // of the form "Ddd Mmm dd hh::mm::ss yyyy", which is returned by asctime.
+    Diag(Tok, diag::ext_pp_timestamp);
+
+    // Get the file that we are lexing out of.  If we're currently lexing from
+    // a macro, dig into the include stack.
+    const FileEntry *CurFile = 0;
+    Lexer *TheLexer = getCurrentFileLexer();
+    
+    if (TheLexer)
+      CurFile = SourceMgr.getFileEntryForLoc(TheLexer->getFileLoc());
+    
+    // If this file is older than the file it depends on, emit a diagnostic.
+    const char *Result;
+    if (CurFile) {
+      time_t TT = CurFile->getModificationTime();
+      struct tm *TM = localtime(&TT);
+      Result = asctime(TM);
+    } else {
+      Result = "??? ??? ?? ??:??:?? ????\n";
+    }
+    TmpBuffer[0] = '"';
+    strcpy(TmpBuffer+1, Result);
+    unsigned Len = strlen(TmpBuffer);
+    TmpBuffer[Len-1] = '"';  // Replace the newline with a quote.
+    Tok.setKind(tok::string_literal);
+    Tok.setLength(Len);
+    Tok.setLocation(CreateString(TmpBuffer, Len, Tok.getLocation()));
+  } else {
+    assert(0 && "Unknown identifier!");
+  }
+}
diff --git a/Lex/Preprocessor.cpp b/Lex/Preprocessor.cpp
index 16abbc5..f7b1d60 100644
--- a/Lex/Preprocessor.cpp
+++ b/Lex/Preprocessor.cpp
@@ -26,14 +26,12 @@
 //===----------------------------------------------------------------------===//
 
 #include "clang/Lex/Preprocessor.h"
-#include "MacroArgs.h"
 #include "clang/Lex/HeaderSearch.h"
 #include "clang/Lex/MacroInfo.h"
 #include "clang/Lex/PPCallbacks.h"
 #include "clang/Lex/Pragma.h"
 #include "clang/Lex/ScratchBuffer.h"
 #include "clang/Basic/Diagnostic.h"
-#include "clang/Basic/FileManager.h"
 #include "clang/Basic/SourceManager.h"
 #include "clang/Basic/TargetInfo.h"
 #include "llvm/ADT/SmallVector.h"
@@ -670,511 +668,6 @@
   IncludeMacroStack.pop_back();
 }
 
-//===----------------------------------------------------------------------===//
-// Macro Expansion Handling.
-//===----------------------------------------------------------------------===//
-
-/// setMacroInfo - Specify a macro for this identifier.
-///
-void Preprocessor::setMacroInfo(IdentifierInfo *II, MacroInfo *MI) {
-  if (MI == 0) {
-    if (II->hasMacroDefinition()) {
-      Macros.erase(II);
-      II->setHasMacroDefinition(false);
-    }
-  } else {
-    Macros[II] = MI;
-    II->setHasMacroDefinition(true);
-  }
-}
-
-/// RegisterBuiltinMacro - Register the specified identifier in the identifier
-/// table and mark it as a builtin macro to be expanded.
-IdentifierInfo *Preprocessor::RegisterBuiltinMacro(const char *Name) {
-  // Get the identifier.
-  IdentifierInfo *Id = getIdentifierInfo(Name);
-  
-  // Mark it as being a macro that is builtin.
-  MacroInfo *MI = new MacroInfo(SourceLocation());
-  MI->setIsBuiltinMacro();
-  setMacroInfo(Id, MI);
-  return Id;
-}
-
-
-/// RegisterBuiltinMacros - Register builtin macros, such as __LINE__ with the
-/// identifier table.
-void Preprocessor::RegisterBuiltinMacros() {
-  Ident__LINE__ = RegisterBuiltinMacro("__LINE__");
-  Ident__FILE__ = RegisterBuiltinMacro("__FILE__");
-  Ident__DATE__ = RegisterBuiltinMacro("__DATE__");
-  Ident__TIME__ = RegisterBuiltinMacro("__TIME__");
-  Ident_Pragma  = RegisterBuiltinMacro("_Pragma");
-  
-  // GCC Extensions.
-  Ident__BASE_FILE__     = RegisterBuiltinMacro("__BASE_FILE__");
-  Ident__INCLUDE_LEVEL__ = RegisterBuiltinMacro("__INCLUDE_LEVEL__");
-  Ident__TIMESTAMP__     = RegisterBuiltinMacro("__TIMESTAMP__");
-}
-
-/// isTrivialSingleTokenExpansion - Return true if MI, which has a single token
-/// in its expansion, currently expands to that token literally.
-static bool isTrivialSingleTokenExpansion(const MacroInfo *MI,
-                                          const IdentifierInfo *MacroIdent,
-                                          Preprocessor &PP) {
-  IdentifierInfo *II = MI->getReplacementToken(0).getIdentifierInfo();
-
-  // If the token isn't an identifier, it's always literally expanded.
-  if (II == 0) return true;
-  
-  // If the identifier is a macro, and if that macro is enabled, it may be
-  // expanded so it's not a trivial expansion.
-  if (II->hasMacroDefinition() && PP.getMacroInfo(II)->isEnabled() &&
-      // Fast expanding "#define X X" is ok, because X would be disabled.
-      II != MacroIdent)
-    return false;
-  
-  // If this is an object-like macro invocation, it is safe to trivially expand
-  // it.
-  if (MI->isObjectLike()) return true;
-
-  // If this is a function-like macro invocation, it's safe to trivially expand
-  // as long as the identifier is not a macro argument.
-  for (MacroInfo::arg_iterator I = MI->arg_begin(), E = MI->arg_end();
-       I != E; ++I)
-    if (*I == II)
-      return false;   // Identifier is a macro argument.
-  
-  return true;
-}
-
-
-/// isNextPPTokenLParen - Determine whether the next preprocessor token to be
-/// lexed is a '('.  If so, consume the token and return true, if not, this
-/// method should have no observable side-effect on the lexed tokens.
-bool Preprocessor::isNextPPTokenLParen() {
-  // Do some quick tests for rejection cases.
-  unsigned Val;
-  if (CurLexer)
-    Val = CurLexer->isNextPPTokenLParen();
-  else
-    Val = CurTokenLexer->isNextTokenLParen();
-  
-  if (Val == 2) {
-    // We have run off the end.  If it's a source file we don't
-    // examine enclosing ones (C99 5.1.1.2p4).  Otherwise walk up the
-    // macro stack.
-    if (CurLexer)
-      return false;
-    for (unsigned i = IncludeMacroStack.size(); i != 0; --i) {
-      IncludeStackInfo &Entry = IncludeMacroStack[i-1];
-      if (Entry.TheLexer)
-        Val = Entry.TheLexer->isNextPPTokenLParen();
-      else
-        Val = Entry.TheTokenLexer->isNextTokenLParen();
-      
-      if (Val != 2)
-        break;
-      
-      // Ran off the end of a source file?
-      if (Entry.TheLexer)
-        return false;
-    }
-  }
-
-  // Okay, if we know that the token is a '(', lex it and return.  Otherwise we
-  // have found something that isn't a '(' or we found the end of the
-  // translation unit.  In either case, return false.
-  if (Val != 1)
-    return false;
-  
-  Token Tok;
-  LexUnexpandedToken(Tok);
-  assert(Tok.is(tok::l_paren) && "Error computing l-paren-ness?");
-  return true;
-}
-
-/// HandleMacroExpandedIdentifier - If an identifier token is read that is to be
-/// expanded as a macro, handle it and return the next token as 'Identifier'.
-bool Preprocessor::HandleMacroExpandedIdentifier(Token &Identifier, 
-                                                 MacroInfo *MI) {
-  // If this is a macro exapnsion in the "#if !defined(x)" line for the file,
-  // then the macro could expand to different things in other contexts, we need
-  // to disable the optimization in this case.
-  if (CurLexer) CurLexer->MIOpt.ExpandedMacro();
-  
-  // If this is a builtin macro, like __LINE__ or _Pragma, handle it specially.
-  if (MI->isBuiltinMacro()) {
-    ExpandBuiltinMacro(Identifier);
-    return false;
-  }
-  
-  /// Args - If this is a function-like macro expansion, this contains,
-  /// for each macro argument, the list of tokens that were provided to the
-  /// invocation.
-  MacroArgs *Args = 0;
-  
-  // If this is a function-like macro, read the arguments.
-  if (MI->isFunctionLike()) {
-    // C99 6.10.3p10: If the preprocessing token immediately after the the macro
-    // name isn't a '(', this macro should not be expanded.  Otherwise, consume
-    // it.
-    if (!isNextPPTokenLParen())
-      return true;
-    
-    // Remember that we are now parsing the arguments to a macro invocation.
-    // Preprocessor directives used inside macro arguments are not portable, and
-    // this enables the warning.
-    InMacroArgs = true;
-    Args = ReadFunctionLikeMacroArgs(Identifier, MI);
-    
-    // Finished parsing args.
-    InMacroArgs = false;
-    
-    // If there was an error parsing the arguments, bail out.
-    if (Args == 0) return false;
-    
-    ++NumFnMacroExpanded;
-  } else {
-    ++NumMacroExpanded;
-  }
-  
-  // Notice that this macro has been used.
-  MI->setIsUsed(true);
-  
-  // If we started lexing a macro, enter the macro expansion body.
-  
-  // If this macro expands to no tokens, don't bother to push it onto the
-  // expansion stack, only to take it right back off.
-  if (MI->getNumTokens() == 0) {
-    // No need for arg info.
-    if (Args) Args->destroy();
-    
-    // Ignore this macro use, just return the next token in the current
-    // buffer.
-    bool HadLeadingSpace = Identifier.hasLeadingSpace();
-    bool IsAtStartOfLine = Identifier.isAtStartOfLine();
-    
-    Lex(Identifier);
-    
-    // If the identifier isn't on some OTHER line, inherit the leading
-    // whitespace/first-on-a-line property of this token.  This handles
-    // stuff like "! XX," -> "! ," and "   XX," -> "    ,", when XX is
-    // empty.
-    if (!Identifier.isAtStartOfLine()) {
-      if (IsAtStartOfLine) Identifier.setFlag(Token::StartOfLine);
-      if (HadLeadingSpace) Identifier.setFlag(Token::LeadingSpace);
-    }
-    ++NumFastMacroExpanded;
-    return false;
-    
-  } else if (MI->getNumTokens() == 1 &&
-             isTrivialSingleTokenExpansion(MI, Identifier.getIdentifierInfo(),
-                                           *this)){
-    // Otherwise, if this macro expands into a single trivially-expanded
-    // token: expand it now.  This handles common cases like 
-    // "#define VAL 42".
-    
-    // Propagate the isAtStartOfLine/hasLeadingSpace markers of the macro
-    // identifier to the expanded token.
-    bool isAtStartOfLine = Identifier.isAtStartOfLine();
-    bool hasLeadingSpace = Identifier.hasLeadingSpace();
-    
-    // Remember where the token is instantiated.
-    SourceLocation InstantiateLoc = Identifier.getLocation();
-    
-    // Replace the result token.
-    Identifier = MI->getReplacementToken(0);
-    
-    // Restore the StartOfLine/LeadingSpace markers.
-    Identifier.setFlagValue(Token::StartOfLine , isAtStartOfLine);
-    Identifier.setFlagValue(Token::LeadingSpace, hasLeadingSpace);
-    
-    // Update the tokens location to include both its logical and physical
-    // locations.
-    SourceLocation Loc =
-      SourceMgr.getInstantiationLoc(Identifier.getLocation(), InstantiateLoc);
-    Identifier.setLocation(Loc);
-    
-    // If this is #define X X, we must mark the result as unexpandible.
-    if (IdentifierInfo *NewII = Identifier.getIdentifierInfo())
-      if (getMacroInfo(NewII) == MI)
-        Identifier.setFlag(Token::DisableExpand);
-    
-    // Since this is not an identifier token, it can't be macro expanded, so
-    // we're done.
-    ++NumFastMacroExpanded;
-    return false;
-  }
-  
-  // Start expanding the macro.
-  EnterMacro(Identifier, Args);
-  
-  // Now that the macro is at the top of the include stack, ask the
-  // preprocessor to read the next token from it.
-  Lex(Identifier);
-  return false;
-}
-
-/// ReadFunctionLikeMacroArgs - After reading "MACRO(", this method is
-/// invoked to read all of the actual arguments specified for the macro
-/// invocation.  This returns null on error.
-MacroArgs *Preprocessor::ReadFunctionLikeMacroArgs(Token &MacroName,
-                                                   MacroInfo *MI) {
-  // The number of fixed arguments to parse.
-  unsigned NumFixedArgsLeft = MI->getNumArgs();
-  bool isVariadic = MI->isVariadic();
-  
-  // Outer loop, while there are more arguments, keep reading them.
-  Token Tok;
-  Tok.setKind(tok::comma);
-  --NumFixedArgsLeft;  // Start reading the first arg.
-
-  // ArgTokens - Build up a list of tokens that make up each argument.  Each
-  // argument is separated by an EOF token.  Use a SmallVector so we can avoid
-  // heap allocations in the common case.
-  llvm::SmallVector<Token, 64> ArgTokens;
-
-  unsigned NumActuals = 0;
-  while (Tok.is(tok::comma)) {
-    // C99 6.10.3p11: Keep track of the number of l_parens we have seen.  Note
-    // that we already consumed the first one.
-    unsigned NumParens = 0;
-    
-    while (1) {
-      // Read arguments as unexpanded tokens.  This avoids issues, e.g., where
-      // an argument value in a macro could expand to ',' or '(' or ')'.
-      LexUnexpandedToken(Tok);
-      
-      if (Tok.is(tok::eof) || Tok.is(tok::eom)) { // "#if f(<eof>" & "#if f(\n"
-        Diag(MacroName, diag::err_unterm_macro_invoc);
-        // Do not lose the EOF/EOM.  Return it to the client.
-        MacroName = Tok;
-        return 0;
-      } else if (Tok.is(tok::r_paren)) {
-        // If we found the ) token, the macro arg list is done.
-        if (NumParens-- == 0)
-          break;
-      } else if (Tok.is(tok::l_paren)) {
-        ++NumParens;
-      } else if (Tok.is(tok::comma) && NumParens == 0) {
-        // Comma ends this argument if there are more fixed arguments expected.
-        if (NumFixedArgsLeft)
-          break;
-        
-        // If this is not a variadic macro, too many args were specified.
-        if (!isVariadic) {
-          // Emit the diagnostic at the macro name in case there is a missing ).
-          // Emitting it at the , could be far away from the macro name.
-          Diag(MacroName, diag::err_too_many_args_in_macro_invoc);
-          return 0;
-        }
-        // Otherwise, continue to add the tokens to this variable argument.
-      } else if (Tok.is(tok::comment) && !KeepMacroComments) {
-        // If this is a comment token in the argument list and we're just in
-        // -C mode (not -CC mode), discard the comment.
-        continue;
-      } else if (Tok.is(tok::identifier)) {
-        // Reading macro arguments can cause macros that we are currently
-        // expanding from to be popped off the expansion stack.  Doing so causes
-        // them to be reenabled for expansion.  Here we record whether any
-        // identifiers we lex as macro arguments correspond to disabled macros.
-        // If so, we mark the token as noexpand.  This is a subtle aspect of 
-        // C99 6.10.3.4p2.
-        if (MacroInfo *MI = getMacroInfo(Tok.getIdentifierInfo()))
-          if (!MI->isEnabled())
-            Tok.setFlag(Token::DisableExpand);
-      }
-  
-      ArgTokens.push_back(Tok);
-    }
-
-    // Empty arguments are standard in C99 and supported as an extension in
-    // other modes.
-    if (ArgTokens.empty() && !Features.C99)
-      Diag(Tok, diag::ext_empty_fnmacro_arg);
-    
-    // Add a marker EOF token to the end of the token list for this argument.
-    Token EOFTok;
-    EOFTok.startToken();
-    EOFTok.setKind(tok::eof);
-    EOFTok.setLocation(Tok.getLocation());
-    EOFTok.setLength(0);
-    ArgTokens.push_back(EOFTok);
-    ++NumActuals;
-    --NumFixedArgsLeft;
-  };
-  
-  // Okay, we either found the r_paren.  Check to see if we parsed too few
-  // arguments.
-  unsigned MinArgsExpected = MI->getNumArgs();
-  
-  // See MacroArgs instance var for description of this.
-  bool isVarargsElided = false;
-  
-  if (NumActuals < MinArgsExpected) {
-    // There are several cases where too few arguments is ok, handle them now.
-    if (NumActuals+1 == MinArgsExpected && MI->isVariadic()) {
-      // Varargs where the named vararg parameter is missing: ok as extension.
-      // #define A(x, ...)
-      // A("blah")
-      Diag(Tok, diag::ext_missing_varargs_arg);
-
-      // Remember this occurred if this is a C99 macro invocation with at least
-      // one actual argument.
-      isVarargsElided = MI->isC99Varargs() && MI->getNumArgs() > 1;
-    } else if (MI->getNumArgs() == 1) {
-      // #define A(x)
-      //   A()
-      // is ok because it is an empty argument.
-      
-      // Empty arguments are standard in C99 and supported as an extension in
-      // other modes.
-      if (ArgTokens.empty() && !Features.C99)
-        Diag(Tok, diag::ext_empty_fnmacro_arg);
-    } else {
-      // Otherwise, emit the error.
-      Diag(Tok, diag::err_too_few_args_in_macro_invoc);
-      return 0;
-    }
-    
-    // Add a marker EOF token to the end of the token list for this argument.
-    SourceLocation EndLoc = Tok.getLocation();
-    Tok.startToken();
-    Tok.setKind(tok::eof);
-    Tok.setLocation(EndLoc);
-    Tok.setLength(0);
-    ArgTokens.push_back(Tok);
-  }
-  
-  return MacroArgs::create(MI, &ArgTokens[0], ArgTokens.size(),isVarargsElided);
-}
-
-/// ComputeDATE_TIME - Compute the current time, enter it into the specified
-/// scratch buffer, then return DATELoc/TIMELoc locations with the position of
-/// the identifier tokens inserted.
-static void ComputeDATE_TIME(SourceLocation &DATELoc, SourceLocation &TIMELoc,
-                             Preprocessor &PP) {
-  time_t TT = time(0);
-  struct tm *TM = localtime(&TT);
-  
-  static const char * const Months[] = {
-    "Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"
-  };
-  
-  char TmpBuffer[100];
-  sprintf(TmpBuffer, "\"%s %2d %4d\"", Months[TM->tm_mon], TM->tm_mday, 
-          TM->tm_year+1900);
-  DATELoc = PP.CreateString(TmpBuffer, strlen(TmpBuffer));
-
-  sprintf(TmpBuffer, "\"%02d:%02d:%02d\"", TM->tm_hour, TM->tm_min, TM->tm_sec);
-  TIMELoc = PP.CreateString(TmpBuffer, strlen(TmpBuffer));
-}
-
-/// ExpandBuiltinMacro - If an identifier token is read that is to be expanded
-/// as a builtin macro, handle it and return the next token as 'Tok'.
-void Preprocessor::ExpandBuiltinMacro(Token &Tok) {
-  // Figure out which token this is.
-  IdentifierInfo *II = Tok.getIdentifierInfo();
-  assert(II && "Can't be a macro without id info!");
-  
-  // If this is an _Pragma directive, expand it, invoke the pragma handler, then
-  // lex the token after it.
-  if (II == Ident_Pragma)
-    return Handle_Pragma(Tok);
-  
-  ++NumBuiltinMacroExpanded;
-
-  char TmpBuffer[100];
-
-  // Set up the return result.
-  Tok.setIdentifierInfo(0);
-  Tok.clearFlag(Token::NeedsCleaning);
-  
-  if (II == Ident__LINE__) {
-    // __LINE__ expands to a simple numeric value.
-    sprintf(TmpBuffer, "%u", SourceMgr.getLogicalLineNumber(Tok.getLocation()));
-    unsigned Length = strlen(TmpBuffer);
-    Tok.setKind(tok::numeric_constant);
-    Tok.setLength(Length);
-    Tok.setLocation(CreateString(TmpBuffer, Length, Tok.getLocation()));
-  } else if (II == Ident__FILE__ || II == Ident__BASE_FILE__) {
-    SourceLocation Loc = Tok.getLocation();
-    if (II == Ident__BASE_FILE__) {
-      Diag(Tok, diag::ext_pp_base_file);
-      SourceLocation NextLoc = SourceMgr.getIncludeLoc(Loc);
-      while (NextLoc.isValid()) {
-        Loc = NextLoc;
-        NextLoc = SourceMgr.getIncludeLoc(Loc);
-      }
-    }
-    
-    // Escape this filename.  Turn '\' -> '\\' '"' -> '\"'
-    std::string FN = SourceMgr.getSourceName(SourceMgr.getLogicalLoc(Loc));
-    FN = '"' + Lexer::Stringify(FN) + '"';
-    Tok.setKind(tok::string_literal);
-    Tok.setLength(FN.size());
-    Tok.setLocation(CreateString(&FN[0], FN.size(), Tok.getLocation()));
-  } else if (II == Ident__DATE__) {
-    if (!DATELoc.isValid())
-      ComputeDATE_TIME(DATELoc, TIMELoc, *this);
-    Tok.setKind(tok::string_literal);
-    Tok.setLength(strlen("\"Mmm dd yyyy\""));
-    Tok.setLocation(SourceMgr.getInstantiationLoc(DATELoc, Tok.getLocation()));
-  } else if (II == Ident__TIME__) {
-    if (!TIMELoc.isValid())
-      ComputeDATE_TIME(DATELoc, TIMELoc, *this);
-    Tok.setKind(tok::string_literal);
-    Tok.setLength(strlen("\"hh:mm:ss\""));
-    Tok.setLocation(SourceMgr.getInstantiationLoc(TIMELoc, Tok.getLocation()));
-  } else if (II == Ident__INCLUDE_LEVEL__) {
-    Diag(Tok, diag::ext_pp_include_level);
-
-    // Compute the include depth of this token.
-    unsigned Depth = 0;
-    SourceLocation Loc = SourceMgr.getIncludeLoc(Tok.getLocation());
-    for (; Loc.isValid(); ++Depth)
-      Loc = SourceMgr.getIncludeLoc(Loc);
-    
-    // __INCLUDE_LEVEL__ expands to a simple numeric value.
-    sprintf(TmpBuffer, "%u", Depth);
-    unsigned Length = strlen(TmpBuffer);
-    Tok.setKind(tok::numeric_constant);
-    Tok.setLength(Length);
-    Tok.setLocation(CreateString(TmpBuffer, Length, Tok.getLocation()));
-  } else if (II == Ident__TIMESTAMP__) {
-    // MSVC, ICC, GCC, VisualAge C++ extension.  The generated string should be
-    // of the form "Ddd Mmm dd hh::mm::ss yyyy", which is returned by asctime.
-    Diag(Tok, diag::ext_pp_timestamp);
-
-    // Get the file that we are lexing out of.  If we're currently lexing from
-    // a macro, dig into the include stack.
-    const FileEntry *CurFile = 0;
-    Lexer *TheLexer = getCurrentFileLexer();
-    
-    if (TheLexer)
-      CurFile = SourceMgr.getFileEntryForLoc(TheLexer->getFileLoc());
-    
-    // If this file is older than the file it depends on, emit a diagnostic.
-    const char *Result;
-    if (CurFile) {
-      time_t TT = CurFile->getModificationTime();
-      struct tm *TM = localtime(&TT);
-      Result = asctime(TM);
-    } else {
-      Result = "??? ??? ?? ??:??:?? ????\n";
-    }
-    TmpBuffer[0] = '"';
-    strcpy(TmpBuffer+1, Result);
-    unsigned Len = strlen(TmpBuffer);
-    TmpBuffer[Len-1] = '"';  // Replace the newline with a quote.
-    Tok.setKind(tok::string_literal);
-    Tok.setLength(Len);
-    Tok.setLocation(CreateString(TmpBuffer, Len, Tok.getLocation()));
-  } else {
-    assert(0 && "Unknown identifier!");
-  }
-}
 
 //===----------------------------------------------------------------------===//
 // Lexer Event Handling.
diff --git a/clang.xcodeproj/project.pbxproj b/clang.xcodeproj/project.pbxproj
index e265404..4ca689d 100644
--- a/clang.xcodeproj/project.pbxproj
+++ b/clang.xcodeproj/project.pbxproj
@@ -101,9 +101,10 @@
 		DE704DD20D1668A4009C7762 /* HeaderMap.cpp in Sources */ = {isa = PBXBuildFile; fileRef = DE704DD10D1668A4009C7762 /* HeaderMap.cpp */; };
 		DE75ED290B044DC90020CF81 /* ASTContext.h in CopyFiles */ = {isa = PBXBuildFile; fileRef = DE75ED280B044DC90020CF81 /* ASTContext.h */; };
 		DE75EDF10B06880E0020CF81 /* Type.cpp in Sources */ = {isa = PBXBuildFile; fileRef = DE75EDF00B06880E0020CF81 /* Type.cpp */; };
-		DE85CD4B0D8378320070E26E /* Directives.cpp in Sources */ = {isa = PBXBuildFile; fileRef = DE85CD4A0D8378320070E26E /* Directives.cpp */; };
 		DE85CD810D8380B10070E26E /* TokenLexer.cpp in Sources */ = {isa = PBXBuildFile; fileRef = DE85CD800D8380B10070E26E /* TokenLexer.cpp */; };
 		DE85CDA30D8383B20070E26E /* MacroArgs.cpp in Sources */ = {isa = PBXBuildFile; fileRef = DE85CDA20D8383B20070E26E /* MacroArgs.cpp */; };
+		DE85CDAC0D838C120070E26E /* PPMacroExpansion.cpp in Sources */ = {isa = PBXBuildFile; fileRef = DE85CDAB0D838C120070E26E /* PPMacroExpansion.cpp */; };
+		DE85CDB00D838C390070E26E /* PPDirectives.cpp in Sources */ = {isa = PBXBuildFile; fileRef = DE85CDAF0D838C390070E26E /* PPDirectives.cpp */; };
 		DE928B130C05659200231DA4 /* ModuleBuilder.cpp in Sources */ = {isa = PBXBuildFile; fileRef = DE928B120C05659200231DA4 /* ModuleBuilder.cpp */; };
 		DE928B200C0565B000231DA4 /* ModuleBuilder.h in CopyFiles */ = {isa = PBXBuildFile; fileRef = DE928B1F0C0565B000231DA4 /* ModuleBuilder.h */; };
 		DE928B7D0C0A615100231DA4 /* CodeGenModule.h in CopyFiles */ = {isa = PBXBuildFile; fileRef = DE928B7C0C0A615100231DA4 /* CodeGenModule.h */; };
@@ -363,11 +364,12 @@
 		DE704DD10D1668A4009C7762 /* HeaderMap.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = HeaderMap.cpp; sourceTree = "<group>"; };
 		DE75ED280B044DC90020CF81 /* ASTContext.h */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.c.h; name = ASTContext.h; path = clang/AST/ASTContext.h; sourceTree = "<group>"; };
 		DE75EDF00B06880E0020CF81 /* Type.cpp */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.cpp.cpp; name = Type.cpp; path = AST/Type.cpp; sourceTree = "<group>"; };
-		DE85CD4A0D8378320070E26E /* Directives.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = Directives.cpp; sourceTree = "<group>"; };
 		DE85CD800D8380B10070E26E /* TokenLexer.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = TokenLexer.cpp; sourceTree = "<group>"; };
 		DE85CD840D8380F20070E26E /* TokenLexer.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = TokenLexer.h; sourceTree = "<group>"; };
 		DE85CD9E0D8382DD0070E26E /* MacroArgs.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = MacroArgs.h; sourceTree = "<group>"; };
 		DE85CDA20D8383B20070E26E /* MacroArgs.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = MacroArgs.cpp; sourceTree = "<group>"; };
+		DE85CDAB0D838C120070E26E /* PPMacroExpansion.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = PPMacroExpansion.cpp; sourceTree = "<group>"; };
+		DE85CDAF0D838C390070E26E /* PPDirectives.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = PPDirectives.cpp; sourceTree = "<group>"; };
 		DE928B120C05659200231DA4 /* ModuleBuilder.cpp */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.cpp.cpp; name = ModuleBuilder.cpp; path = CodeGen/ModuleBuilder.cpp; sourceTree = "<group>"; };
 		DE928B1F0C0565B000231DA4 /* ModuleBuilder.h */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.c.h; name = ModuleBuilder.h; path = clang/CodeGen/ModuleBuilder.h; sourceTree = "<group>"; };
 		DE928B7C0C0A615100231DA4 /* CodeGenModule.h */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.c.h; name = CodeGenModule.h; path = CodeGen/CodeGenModule.h; sourceTree = "<group>"; };
@@ -814,7 +816,6 @@
 		DED7D78C0A5242E6003AD0FB /* Lex */ = {
 			isa = PBXGroup;
 			children = (
-				DE85CD4A0D8378320070E26E /* Directives.cpp */,
 				DE704DD10D1668A4009C7762 /* HeaderMap.cpp */,
 				DE344B530AE5E46C00DBC861 /* HeaderSearch.cpp */,
 				DED7D79E0A5242E6003AD0FB /* Lexer.cpp */,
@@ -822,7 +823,9 @@
 				DE85CD9E0D8382DD0070E26E /* MacroArgs.h */,
 				DE85CDA20D8383B20070E26E /* MacroArgs.cpp */,
 				DED7D7A00A5242E6003AD0FB /* MacroInfo.cpp */,
+				DE85CDAF0D838C390070E26E /* PPDirectives.cpp */,
 				DED7D7A20A5242E6003AD0FB /* PPExpressions.cpp */,
+				DE85CDAB0D838C120070E26E /* PPMacroExpansion.cpp */,
 				DED7D7A30A5242E6003AD0FB /* Pragma.cpp */,
 				DED7D7A40A5242E6003AD0FB /* Preprocessor.cpp */,
 				DED7D9E40A5257F6003AD0FB /* ScratchBuffer.cpp */,
@@ -986,9 +989,10 @@
 				DE41213F0D7F1C1C0080F80A /* ProgramPoint.cpp in Sources */,
 				35D55B270D81D8C60092E734 /* BasicValueFactory.cpp in Sources */,
 				35D55B280D81D8C60092E734 /* CFRefCount.cpp in Sources */,
-				DE85CD4B0D8378320070E26E /* Directives.cpp in Sources */,
 				DE85CD810D8380B10070E26E /* TokenLexer.cpp in Sources */,
 				DE85CDA30D8383B20070E26E /* MacroArgs.cpp in Sources */,
+				DE85CDAC0D838C120070E26E /* PPMacroExpansion.cpp in Sources */,
+				DE85CDB00D838C390070E26E /* PPDirectives.cpp in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};