--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/AsmParser/LLLexer.h	Thu Dec 12 13:56:28 2013 +0900
@@ -0,0 +1,93 @@
+//===- LLLexer.h - Lexer for LLVM Assembly 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 .ll files.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LIB_ASMPARSER_LLLEXER_H
+#define LIB_ASMPARSER_LLLEXER_H
+
+#include "LLToken.h"
+#include "llvm/ADT/APFloat.h"
+#include "llvm/ADT/APSInt.h"
+#include "llvm/Support/SourceMgr.h"
+#include <string>
+
+namespace llvm {
+  class MemoryBuffer;
+  class Type;
+  class SMDiagnostic;
+  class LLVMContext;
+
+  class LLLexer {
+    const char *CurPtr;
+    MemoryBuffer *CurBuf;
+    SMDiagnostic &ErrorInfo;
+    SourceMgr &SM;
+    LLVMContext &Context;
+
+    // Information about the current token.
+    const char *TokStart;
+    lltok::Kind CurKind;
+    std::string StrVal;
+    unsigned UIntVal;
+    Type *TyVal;
+    APFloat APFloatVal;
+    APSInt  APSIntVal;
+
+  public:
+    explicit LLLexer(MemoryBuffer *StartBuf, SourceMgr &SM, SMDiagnostic &,
+                     LLVMContext &C);
+    ~LLLexer() {}
+
+    lltok::Kind Lex() {
+      return CurKind = LexToken();
+    }
+
+    typedef SMLoc LocTy;
+    LocTy getLoc() const { return SMLoc::getFromPointer(TokStart); }
+    lltok::Kind getKind() const { return CurKind; }
+    const std::string &getStrVal() const { return StrVal; }
+    Type *getTyVal() const { return TyVal; }
+    unsigned getUIntVal() const { return UIntVal; }
+    const APSInt &getAPSIntVal() const { return APSIntVal; }
+    const APFloat &getAPFloatVal() const { return APFloatVal; }
+
+
+    bool Error(LocTy L, const Twine &Msg) const;
+    bool Error(const Twine &Msg) const { return Error(getLoc(), Msg); }
+    std::string getFilename() const;
+
+  private:
+    lltok::Kind LexToken();
+
+    int getNextChar();
+    void SkipLineComment();
+    lltok::Kind ReadString(lltok::Kind kind);
+    bool ReadVarName();
+
+    lltok::Kind LexIdentifier();
+    lltok::Kind LexDigitOrNegative();
+    lltok::Kind LexPositive();
+    lltok::Kind LexAt();
+    lltok::Kind LexExclaim();
+    lltok::Kind LexPercent();
+    lltok::Kind LexQuote();
+    lltok::Kind Lex0x();
+    lltok::Kind LexHash();
+
+    uint64_t atoull(const char *Buffer, const char *End);
+    uint64_t HexIntToVal(const char *Buffer, const char *End);
+    void HexToIntPair(const char *Buffer, const char *End, uint64_t Pair[2]);
+    void FP80HexToIntPair(const char *Buff, const char *End, uint64_t Pair[2]);
+  };
+} // end namespace llvm
+
+#endif