[llvm] Conditionally include target intrinsics, based on --enable-target

utils/TableGen/TGLexer.h

 //===- TGLexer.h - Lexer for TableGen Files ---------------------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This class represents the Lexer for tablegen files.
@@ skipping 56 matching lines @@
   const char *TokStart;
   tgtok::TokKind CurCode;
   std::string CurStrVal;  // This is valid for ID, STRVAL, VARNAME, CODEFRAGMENT
   int64_t CurIntVal;      // This is valid for INTVAL.
 
   /// CurBuffer - This is the current buffer index we're lexing from as managed
   /// by the SourceMgr object.
   int CurBuffer;
   /// Dependencies - This is the list of all included files.
   std::vector<std::string> Dependencies;
-  
+
+  /// PreProcDefines - This holds a list of TableGen defines (similar in
+  /// spirit to C pre-processor defines).
+  std::vector<std::string> PreProcDefines;
+
 public:
-  TGLexer(SourceMgr &SrcMgr);
+  TGLexer(SourceMgr &SrcMgr, std::vector<std::string> PreProcDefines);
   ~TGLexer() {}
   
   tgtok::TokKind Lex() {
     return CurCode = LexToken();
   }
 
   const std::vector<std::string> &getDependencies() const {
     return Dependencies;
   }
   
   tgtok::TokKind getCode() const { return CurCode; }
 
   const std::string &getCurStrVal() const {
     assert((CurCode == tgtok::Id || CurCode == tgtok::StrVal || 
             CurCode == tgtok::VarName || CurCode == tgtok::CodeFragment) &&
            "This token doesn't have a string value");
     return CurStrVal;
   }
   int64_t getCurIntVal() const {
     assert(CurCode == tgtok::IntVal && "This token isn't an integer");
     return CurIntVal;
   }
 
   SMLoc getLoc() const;
-  
+
+  bool hasPreProcDefine(const std::string &Symbol) const;
+
 private:
   /// LexToken - Read the next token and return its code.
   tgtok::TokKind LexToken();
   
   tgtok::TokKind ReturnError(const char *Loc, const Twine &Msg);
   
   int getNextChar();
   void SkipBCPLComment();
   bool SkipCComment();
   tgtok::TokKind LexIdentifier();
   bool LexInclude();
+  bool LexIncludeIf();
+  bool AddIncludeFile(const std::string &Filename);
   tgtok::TokKind LexString();
   tgtok::TokKind LexVarName();
   tgtok::TokKind LexNumber();
   tgtok::TokKind LexBracket();
   tgtok::TokKind LexExclaim();
 };
   
 } // end namespace llvm
 
 #endif