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.
61 unsigned StringOffset;
66 MIToken(TokenKind Kind, StringRef Range, unsigned StringOffset = 0)
67 : Kind(Kind), StringOffset(StringOffset), Range(Range) {}
69 MIToken(TokenKind Kind, StringRef Range, const APSInt &IntVal,
70 unsigned StringOffset = 0)
71 : Kind(Kind), StringOffset(StringOffset), Range(Range), IntVal(IntVal) {}
73 TokenKind kind() const { return Kind; }
75 bool isError() const { return Kind == Error; }
77 bool isRegister() const {
78 return Kind == NamedRegister || Kind == underscore ||
79 Kind == VirtualRegister;
82 bool isRegisterFlag() const {
83 return Kind == kw_implicit || Kind == kw_implicit_define ||
84 Kind == kw_dead || Kind == kw_killed || Kind == kw_undef;
87 bool is(TokenKind K) const { return Kind == K; }
89 bool isNot(TokenKind K) const { return Kind != K; }
91 StringRef::iterator location() const { return Range.begin(); }
93 StringRef stringValue() const { return Range.drop_front(StringOffset); }
95 const APSInt &integerValue() const { return IntVal; }
97 bool hasIntegerValue() const {
98 return Kind == IntegerLiteral || Kind == MachineBasicBlock ||
99 Kind == GlobalValue || Kind == VirtualRegister;
103 /// Consume a single machine instruction token in the given source and return
104 /// the remaining source string.
105 StringRef lexMIToken(
106 StringRef Source, MIToken &Token,
107 function_ref<void(StringRef::iterator, const Twine &)> ErrorCallback);
109 } // end namespace llvm