Fix PR4910: Broken logic in coalescer means when a physical register liveness is...
[llvm/avr.git] / tools / llvm-mc / AsmLexer.h
blob0c2ec138924e4e40dd1b370958df721460f0e298
1 //===- AsmLexer.h - Lexer for Assembly Files --------------------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This class declares the lexer for assembly files.
12 //===----------------------------------------------------------------------===//
14 #ifndef ASMLEXER_H
15 #define ASMLEXER_H
17 #include "llvm/ADT/StringRef.h"
18 #include "llvm/MC/MCAsmLexer.h"
19 #include "llvm/MC/MCAsmInfo.h"
20 #include "llvm/Support/DataTypes.h"
21 #include <string>
22 #include <cassert>
24 namespace llvm {
25 class MemoryBuffer;
26 class SourceMgr;
27 class SMLoc;
28 class MCAsmInfo;
30 /// AsmLexer - Lexer class for assembly files.
31 class AsmLexer : public MCAsmLexer {
32 SourceMgr &SrcMgr;
33 const MCAsmInfo MAI;
35 const char *CurPtr;
36 const MemoryBuffer *CurBuf;
38 const char *TokStart;
40 /// This is the current buffer index we're lexing from as managed by the
41 /// SourceMgr object.
42 int CurBuffer;
44 void operator=(const AsmLexer&); // DO NOT IMPLEMENT
45 AsmLexer(const AsmLexer&); // DO NOT IMPLEMENT
47 protected:
48 /// LexToken - Read the next token and return its code.
49 virtual AsmToken LexToken();
51 public:
52 AsmLexer(SourceMgr &SrcMgr, const MCAsmInfo &MAI);
53 ~AsmLexer();
55 SMLoc getLoc() const;
57 StringRef LexUntilEndOfStatement();
59 bool isAtStartOfComment(char Char);
61 /// EnterIncludeFile - Enter the specified file. This returns true on failure.
62 bool EnterIncludeFile(const std::string &Filename);
64 void PrintMessage(SMLoc Loc, const std::string &Msg, const char *Type) const;
66 private:
67 int getNextChar();
68 AsmToken ReturnError(const char *Loc, const std::string &Msg);
70 AsmToken LexIdentifier();
71 AsmToken LexSlash();
72 AsmToken LexLineComment();
73 AsmToken LexDigit();
74 AsmToken LexQuote();
77 } // end namespace llvm
79 #endif