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.
55 kw_cfi_def_cfa_register,
56 kw_cfi_def_cfa_offset,
91 unsigned StringOffset;
94 std::string StringValue;
98 MIToken(TokenKind Kind, StringRef Range, unsigned StringOffset = 0)
99 : Kind(Kind), StringOffset(StringOffset), HasStringValue(false),
102 MIToken(TokenKind Kind, StringRef Range, std::string StringValue,
103 unsigned StringOffset = 0)
104 : Kind(Kind), StringOffset(StringOffset), HasStringValue(true),
105 Range(Range), StringValue(std::move(StringValue)) {}
107 MIToken(TokenKind Kind, StringRef Range, const APSInt &IntVal,
108 unsigned StringOffset = 0)
109 : Kind(Kind), StringOffset(StringOffset), HasStringValue(false),
110 Range(Range), IntVal(IntVal) {}
112 TokenKind kind() const { return Kind; }
114 bool isError() const { return Kind == Error; }
116 bool isRegister() const {
117 return Kind == NamedRegister || Kind == underscore ||
118 Kind == VirtualRegister;
121 bool isRegisterFlag() const {
122 return Kind == kw_implicit || Kind == kw_implicit_define ||
123 Kind == kw_dead || Kind == kw_killed || Kind == kw_undef ||
124 Kind == kw_early_clobber || Kind == kw_debug_use;
127 bool isMemoryOperandFlag() const { return Kind == kw_volatile; }
129 bool is(TokenKind K) const { return Kind == K; }
131 bool isNot(TokenKind K) const { return Kind != K; }
133 StringRef::iterator location() const { return Range.begin(); }
135 /// Return the token's raw string value.
137 /// If the string value is quoted, this method returns that quoted string as
138 /// it is, without unescaping the string value.
139 StringRef rawStringValue() const { return Range.drop_front(StringOffset); }
141 /// Return the token's string value.
142 StringRef stringValue() const {
143 return HasStringValue ? StringRef(StringValue)
144 : Range.drop_front(StringOffset);
147 const APSInt &integerValue() const { return IntVal; }
149 bool hasIntegerValue() const {
150 return Kind == IntegerLiteral || Kind == MachineBasicBlock ||
151 Kind == StackObject || Kind == FixedStackObject ||
152 Kind == GlobalValue || Kind == VirtualRegister ||
153 Kind == ConstantPoolItem || Kind == JumpTableIndex ||
158 /// Consume a single machine instruction token in the given source and return
159 /// the remaining source string.
160 StringRef lexMIToken(
161 StringRef Source, MIToken &Token,
162 function_ref<void(StringRef::iterator, const Twine &)> ErrorCallback);
164 } // end namespace llvm