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.
60 unsigned StringOffset;
65 MIToken(TokenKind Kind, StringRef Range, unsigned StringOffset = 0)
66 : Kind(Kind), StringOffset(StringOffset), Range(Range) {}
68 MIToken(TokenKind Kind, StringRef Range, const APSInt &IntVal,
69 unsigned StringOffset = 0)
70 : Kind(Kind), StringOffset(StringOffset), Range(Range), IntVal(IntVal) {}
72 TokenKind kind() const { return Kind; }
74 bool isError() const { return Kind == Error; }
76 bool isRegister() const {
77 return Kind == NamedRegister || Kind == underscore ||
78 Kind == VirtualRegister;
81 bool isRegisterFlag() const {
82 return Kind == kw_implicit || Kind == kw_implicit_define ||
83 Kind == kw_dead || Kind == kw_killed || Kind == kw_undef;
86 bool is(TokenKind K) const { return Kind == K; }
88 bool isNot(TokenKind K) const { return Kind != K; }
90 StringRef::iterator location() const { return Range.begin(); }
92 StringRef stringValue() const { return Range.drop_front(StringOffset); }
94 const APSInt &integerValue() const { return IntVal; }
96 bool hasIntegerValue() const {
97 return Kind == IntegerLiteral || Kind == MachineBasicBlock ||
98 Kind == GlobalValue || Kind == VirtualRegister;
102 /// Consume a single machine instruction token in the given source and return
103 /// the remaining source string.
104 StringRef lexMIToken(
105 StringRef Source, MIToken &Token,
106 function_ref<void(StringRef::iterator, const Twine &)> ErrorCallback);
108 } // end namespace llvm