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.
57 kw_cfi_def_cfa_register,
58 kw_cfi_def_cfa_offset,
96 unsigned StringOffset;
99 std::string StringValue;
103 MIToken(TokenKind Kind, StringRef Range, unsigned StringOffset = 0)
104 : Kind(Kind), StringOffset(StringOffset), HasStringValue(false),
107 MIToken(TokenKind Kind, StringRef Range, std::string StringValue,
108 unsigned StringOffset = 0)
109 : Kind(Kind), StringOffset(StringOffset), HasStringValue(true),
110 Range(Range), StringValue(std::move(StringValue)) {}
112 MIToken(TokenKind Kind, StringRef Range, const APSInt &IntVal,
113 unsigned StringOffset = 0)
114 : Kind(Kind), StringOffset(StringOffset), HasStringValue(false),
115 Range(Range), IntVal(IntVal) {}
117 TokenKind kind() const { return Kind; }
119 bool isError() const { return Kind == Error; }
121 bool isRegister() const {
122 return Kind == NamedRegister || Kind == underscore ||
123 Kind == VirtualRegister;
126 bool isRegisterFlag() const {
127 return Kind == kw_implicit || Kind == kw_implicit_define ||
128 Kind == kw_dead || Kind == kw_killed || Kind == kw_undef ||
129 Kind == kw_early_clobber || Kind == kw_debug_use;
132 bool isMemoryOperandFlag() const {
133 return Kind == kw_volatile || Kind == kw_non_temporal;
136 bool is(TokenKind K) const { return Kind == K; }
138 bool isNot(TokenKind K) const { return Kind != K; }
140 StringRef::iterator location() const { return Range.begin(); }
142 /// Return the token's raw string value.
144 /// If the string value is quoted, this method returns that quoted string as
145 /// it is, without unescaping the string value.
146 StringRef rawStringValue() const { return Range.drop_front(StringOffset); }
148 /// Return the token's string value.
149 StringRef stringValue() const {
150 return HasStringValue ? StringRef(StringValue)
151 : Range.drop_front(StringOffset);
154 const APSInt &integerValue() const { return IntVal; }
156 bool hasIntegerValue() const {
157 return Kind == IntegerLiteral || Kind == MachineBasicBlock ||
158 Kind == StackObject || Kind == FixedStackObject ||
159 Kind == GlobalValue || Kind == VirtualRegister ||
160 Kind == ConstantPoolItem || Kind == JumpTableIndex ||
165 /// Consume a single machine instruction token in the given source and return
166 /// the remaining source string.
167 StringRef lexMIToken(
168 StringRef Source, MIToken &Token,
169 function_ref<void(StringRef::iterator, const Twine &)> ErrorCallback);
171 } // end namespace llvm