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.
53 MIToken(TokenKind Kind, StringRef Range) : Kind(Kind), Range(Range) {}
55 MIToken(TokenKind Kind, StringRef Range, const APSInt &IntVal)
56 : Kind(Kind), Range(Range), IntVal(IntVal) {}
58 TokenKind kind() const { return Kind; }
60 bool isError() const { return Kind == Error; }
62 bool isRegister() const {
63 return Kind == NamedRegister || Kind == underscore;
66 bool is(TokenKind K) const { return Kind == K; }
68 bool isNot(TokenKind K) const { return Kind != K; }
70 StringRef::iterator location() const { return Range.begin(); }
72 StringRef stringValue() const { return Range; }
74 const APSInt &integerValue() const { return IntVal; }
77 /// Consume a single machine instruction token in the given source and return
78 /// the remaining source string.
80 StringRef Source, MIToken &Token,
81 function_ref<void(StringRef::iterator, const Twine &)> ErrorCallback);
83 } // end namespace llvm