LLVM 17.0.0git
LLLexer.h
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1//===- LLLexer.h - Lexer for LLVM Assembly Files ----------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This class represents the Lexer for .ll files.
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef LLVM_ASMPARSER_LLLEXER_H
14#define LLVM_ASMPARSER_LLLEXER_H
15
16#include "LLToken.h"
17#include "llvm/ADT/APFloat.h"
18#include "llvm/ADT/APSInt.h"
19#include "llvm/Support/SMLoc.h"
20#include <string>
21
22namespace llvm {
23 class Type;
24 class SMDiagnostic;
25 class SourceMgr;
26 class LLVMContext;
27
28 class LLLexer {
29 const char *CurPtr;
30 StringRef CurBuf;
32 SourceMgr &SM;
33 LLVMContext &Context;
34
35 // Information about the current token.
36 const char *TokStart;
37 lltok::Kind CurKind;
38 std::string StrVal;
39 unsigned UIntVal;
40 Type *TyVal = nullptr;
41 APFloat APFloatVal;
42 APSInt APSIntVal;
43
44 // When false (default), an identifier ending in ':' is a label token.
45 // When true, the ':' is treated as a separate token.
46 bool IgnoreColonInIdentifiers;
47
48 public:
49 explicit LLLexer(StringRef StartBuf, SourceMgr &SM, SMDiagnostic &,
50 LLVMContext &C);
51
53 return CurKind = LexToken();
54 }
55
56 typedef SMLoc LocTy;
57 LocTy getLoc() const { return SMLoc::getFromPointer(TokStart); }
58 lltok::Kind getKind() const { return CurKind; }
59 const std::string &getStrVal() const { return StrVal; }
60 Type *getTyVal() const { return TyVal; }
61 unsigned getUIntVal() const { return UIntVal; }
62 const APSInt &getAPSIntVal() const { return APSIntVal; }
63 const APFloat &getAPFloatVal() const { return APFloatVal; }
64
66 IgnoreColonInIdentifiers = val;
67 }
68
69 bool Error(LocTy ErrorLoc, const Twine &Msg) const;
70 bool Error(const Twine &Msg) const { return Error(getLoc(), Msg); }
71
72 void Warning(LocTy WarningLoc, const Twine &Msg) const;
73 void Warning(const Twine &Msg) const { return Warning(getLoc(), Msg); }
74
75 private:
76 lltok::Kind LexToken();
77
78 int getNextChar();
79 void SkipLineComment();
80 lltok::Kind ReadString(lltok::Kind kind);
81 bool ReadVarName();
82
83 lltok::Kind LexIdentifier();
84 lltok::Kind LexDigitOrNegative();
85 lltok::Kind LexPositive();
86 lltok::Kind LexAt();
87 lltok::Kind LexDollar();
88 lltok::Kind LexExclaim();
89 lltok::Kind LexPercent();
90 lltok::Kind LexUIntID(lltok::Kind Token);
91 lltok::Kind LexVar(lltok::Kind Var, lltok::Kind VarID);
92 lltok::Kind LexQuote();
93 lltok::Kind Lex0x();
94 lltok::Kind LexHash();
95 lltok::Kind LexCaret();
96
97 uint64_t atoull(const char *Buffer, const char *End);
98 uint64_t HexIntToVal(const char *Buffer, const char *End);
99 void HexToIntPair(const char *Buffer, const char *End, uint64_t Pair[2]);
100 void FP80HexToIntPair(const char *Buffer, const char *End, uint64_t Pair[2]);
101 };
102} // end namespace llvm
103
104#endif
This file declares a class to represent arbitrary precision floating point values and provide a varie...
This file implements the APSInt class, which is a simple class that represents an arbitrary sized int...
RelocType Type
Definition: COFFYAML.cpp:390
An arbitrary precision integer that knows its signedness.
Definition: APSInt.h:23
Base class for user error types.
Definition: Error.h:348
Lightweight error class with error context and mandatory checking.
Definition: Error.h:156
lltok::Kind Lex()
Definition: LLLexer.h:52
unsigned getUIntVal() const
Definition: LLLexer.h:61
lltok::Kind getKind() const
Definition: LLLexer.h:58
bool Error(const Twine &Msg) const
Definition: LLLexer.h:70
const std::string & getStrVal() const
Definition: LLLexer.h:59
void Warning(const Twine &Msg) const
Definition: LLLexer.h:73
Type * getTyVal() const
Definition: LLLexer.h:60
LocTy getLoc() const
Definition: LLLexer.h:57
SMLoc LocTy
Definition: LLLexer.h:56
const APSInt & getAPSIntVal() const
Definition: LLLexer.h:62
void setIgnoreColonInIdentifiers(bool val)
Definition: LLLexer.h:65
const APFloat & getAPFloatVal() const
Definition: LLLexer.h:63
This is an important class for using LLVM in a threaded context.
Definition: LLVMContext.h:67
Instances of this class encapsulate one diagnostic report, allowing printing to a raw_ostream as a ca...
Definition: SourceMgr.h:281
Represents a location in source code.
Definition: SMLoc.h:23
static SMLoc getFromPointer(const char *Ptr)
Definition: SMLoc.h:36
This owns the files read by a parser, handles include stacks, and handles diagnostic wrangling.
Definition: SourceMgr.h:31
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:50
Twine - A lightweight data structure for efficiently representing the concatenation of temporary valu...
Definition: Twine.h:81
The instances of the Type class are immutable: once they are created, they are never changed.
Definition: Type.h:45
@ C
The default llvm calling convention, compatible with C.
Definition: CallingConv.h:34
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18