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.
58 unsigned StringOffset;
63 MIToken(TokenKind Kind, StringRef Range, unsigned StringOffset = 0)
64 : Kind(Kind), StringOffset(StringOffset), Range(Range) {}
66 MIToken(TokenKind Kind, StringRef Range, const APSInt &IntVal,
67 unsigned StringOffset = 0)
68 : Kind(Kind), StringOffset(StringOffset), Range(Range), IntVal(IntVal) {}
70 TokenKind kind() const { return Kind; }
72 bool isError() const { return Kind == Error; }
74 bool isRegister() const {
75 return Kind == NamedRegister || Kind == underscore;
78 bool isRegisterFlag() const {
79 return Kind == kw_implicit || Kind == kw_implicit_define ||
80 Kind == kw_dead || Kind == kw_killed;
83 bool is(TokenKind K) const { return Kind == K; }
85 bool isNot(TokenKind K) const { return Kind != K; }
87 StringRef::iterator location() const { return Range.begin(); }
89 StringRef stringValue() const { return Range.drop_front(StringOffset); }
91 const APSInt &integerValue() const { return IntVal; }
93 bool hasIntegerValue() const {
94 return Kind == IntegerLiteral || Kind == MachineBasicBlock ||
99 /// Consume a single machine instruction token in the given source and return
100 /// the remaining source string.
101 StringRef lexMIToken(
102 StringRef Source, MIToken &Token,
103 function_ref<void(StringRef::iterator, const Twine &)> ErrorCallback);
105 } // end namespace llvm