LLVM  4.0.0
LLLexer.h
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1 //===- LLLexer.h - Lexer for LLVM 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 represents the Lexer for .ll files.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_LIB_ASMPARSER_LLLEXER_H
15 #define LLVM_LIB_ASMPARSER_LLLEXER_H
16 
17 #include "LLToken.h"
18 #include "llvm/ADT/APFloat.h"
19 #include "llvm/ADT/APSInt.h"
20 #include "llvm/Support/SourceMgr.h"
21 #include <string>
22 
23 namespace llvm {
24  class MemoryBuffer;
25  class Type;
26  class SMDiagnostic;
27  class LLVMContext;
28 
29  class LLLexer {
30  const char *CurPtr;
31  StringRef CurBuf;
33  SourceMgr &SM;
34  LLVMContext &Context;
35 
36  // Information about the current token.
37  const char *TokStart;
38  lltok::Kind CurKind;
39  std::string StrVal;
40  unsigned UIntVal;
41  Type *TyVal;
42  APFloat APFloatVal;
43  APSInt APSIntVal;
44 
45  public:
46  explicit LLLexer(StringRef StartBuf, SourceMgr &SM, SMDiagnostic &,
47  LLVMContext &C);
48 
50  return CurKind = LexToken();
51  }
52 
53  typedef SMLoc LocTy;
54  LocTy getLoc() const { return SMLoc::getFromPointer(TokStart); }
55  lltok::Kind getKind() const { return CurKind; }
56  const std::string &getStrVal() const { return StrVal; }
57  Type *getTyVal() const { return TyVal; }
58  unsigned getUIntVal() const { return UIntVal; }
59  const APSInt &getAPSIntVal() const { return APSIntVal; }
60  const APFloat &getAPFloatVal() const { return APFloatVal; }
61 
62 
63  bool Error(LocTy L, const Twine &Msg) const;
64  bool Error(const Twine &Msg) const { return Error(getLoc(), Msg); }
65 
66  void Warning(LocTy WarningLoc, const Twine &Msg) const;
67  void Warning(const Twine &Msg) const { return Warning(getLoc(), Msg); }
68 
69  private:
70  lltok::Kind LexToken();
71 
72  int getNextChar();
73  void SkipLineComment();
74  lltok::Kind ReadString(lltok::Kind kind);
75  bool ReadVarName();
76 
77  lltok::Kind LexIdentifier();
78  lltok::Kind LexDigitOrNegative();
79  lltok::Kind LexPositive();
80  lltok::Kind LexAt();
81  lltok::Kind LexDollar();
82  lltok::Kind LexExclaim();
83  lltok::Kind LexPercent();
84  lltok::Kind LexVar(lltok::Kind Var, lltok::Kind VarID);
85  lltok::Kind LexQuote();
86  lltok::Kind Lex0x();
87  lltok::Kind LexHash();
88 
89  uint64_t atoull(const char *Buffer, const char *End);
90  uint64_t HexIntToVal(const char *Buffer, const char *End);
91  void HexToIntPair(const char *Buffer, const char *End, uint64_t Pair[2]);
92  void FP80HexToIntPair(const char *Buff, const char *End, uint64_t Pair[2]);
93  };
94 } // end namespace llvm
95 
96 #endif
MachineLoop * L
const APFloat & getAPFloatVal() const
Definition: LLLexer.h:60
unsigned getUIntVal() const
Definition: LLLexer.h:58
void Warning(LocTy WarningLoc, const Twine &Msg) const
Definition: LLLexer.cpp:34
Twine - A lightweight data structure for efficiently representing the concatenation of temporary valu...
Definition: Twine.h:81
lltok::Kind Lex()
Definition: LLLexer.h:49
LLLexer(StringRef StartBuf, SourceMgr &SM, SMDiagnostic &, LLVMContext &C)
Definition: LLLexer.cpp:160
void Warning(const Twine &Msg) const
Definition: LLLexer.h:67
The instances of the Type class are immutable: once they are created, they are never changed...
Definition: Type.h:45
This is an important class for using LLVM in a threaded context.
Definition: LLVMContext.h:48
This file declares a class to represent arbitrary precision floating point values and provide a varie...
LocTy getLoc() const
Definition: LLLexer.h:54
static const unsigned End
This owns the files read by a parser, handles include stacks, and handles diagnostic wrangling...
Definition: SourceMgr.h:35
bool Error(LocTy L, const Twine &Msg) const
Definition: LLLexer.cpp:29
const std::string & getStrVal() const
Definition: LLLexer.h:56
static GCRegistry::Add< ShadowStackGC > C("shadow-stack","Very portable GC for uncooperative code generators")
Base class for user error types.
SMLoc LocTy
Definition: LLLexer.h:53
static SMLoc getFromPointer(const char *Ptr)
Definition: SMLoc.h:37
lltok::Kind getKind() const
Definition: LLLexer.h:55
bool Error(const Twine &Msg) const
Definition: LLLexer.h:64
const APSInt & getAPSIntVal() const
Definition: LLLexer.h:59
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:47
Type * getTyVal() const
Definition: LLLexer.h:57
Represents a location in source code.
Definition: SMLoc.h:24
Instances of this class encapsulate one diagnostic report, allowing printing to a raw_ostream as a ca...
Definition: SourceMgr.h:228