1 //===- MILexer.h - Lexer for machine instructions -------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file declares the function that lexes the machine instruction source
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_LIB_CODEGEN_MIRPARSER_MILEXER_H
16 #define LLVM_LIB_CODEGEN_MIRPARSER_MILEXER_H
18 #include "llvm/ADT/APSInt.h"
19 #include "llvm/ADT/StringRef.h"
20 #include "llvm/ADT/STLExtras.h"
27 /// A token produced by the machine instruction lexer.
34 // Tokens with no info.
49 kw_cfi_def_cfa_offset,
58 QuotedNamedGlobalValue,
72 unsigned StringOffset;
77 MIToken(TokenKind Kind, StringRef Range, unsigned StringOffset = 0)
78 : Kind(Kind), StringOffset(StringOffset), Range(Range) {}
80 MIToken(TokenKind Kind, StringRef Range, const APSInt &IntVal,
81 unsigned StringOffset = 0)
82 : Kind(Kind), StringOffset(StringOffset), Range(Range), IntVal(IntVal) {}
84 TokenKind kind() const { return Kind; }
86 bool isError() const { return Kind == Error; }
88 bool isRegister() const {
89 return Kind == NamedRegister || Kind == underscore ||
90 Kind == VirtualRegister;
93 bool isRegisterFlag() const {
94 return Kind == kw_implicit || Kind == kw_implicit_define ||
95 Kind == kw_dead || Kind == kw_killed || Kind == kw_undef;
98 bool is(TokenKind K) const { return Kind == K; }
100 bool isNot(TokenKind K) const { return Kind != K; }
102 StringRef::iterator location() const { return Range.begin(); }
104 bool isStringValueQuoted() const {
105 return Kind == QuotedNamedGlobalValue || Kind == QuotedExternalSymbol;
108 /// Return the token's raw string value.
110 /// If the string value is quoted, this method returns that quoted string as
111 /// it is, without unescaping the string value.
112 StringRef rawStringValue() const { return Range.drop_front(StringOffset); }
114 /// Return token's string value.
116 /// Expects the string value to be unquoted.
117 StringRef stringValue() const {
118 assert(!isStringValueQuoted() && "String value is quoted");
119 return Range.drop_front(StringOffset);
122 /// Unescapes the token's string value.
124 /// Expects the string value to be quoted.
125 void unescapeQuotedStringValue(std::string &Str) const;
127 const APSInt &integerValue() const { return IntVal; }
129 bool hasIntegerValue() const {
130 return Kind == IntegerLiteral || Kind == MachineBasicBlock ||
131 Kind == StackObject || Kind == FixedStackObject ||
132 Kind == GlobalValue || Kind == VirtualRegister ||
133 Kind == ConstantPoolItem || Kind == JumpTableIndex;
137 /// Consume a single machine instruction token in the given source and return
138 /// the remaining source string.
139 StringRef lexMIToken(
140 StringRef Source, MIToken &Token,
141 function_ref<void(StringRef::iterator, const Twine &)> ErrorCallback);
143 } // end namespace llvm