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ac57f351bd
Reviewers: Duncan P. N. Exon Smith Differential Revision: http://reviews.llvm.org/D10573 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240481 91177308-0d34-0410-b5e6-96231b3b80d8
83 lines
2.0 KiB
C++
83 lines
2.0 KiB
C++
//===- MILexer.h - Lexer for machine instructions -------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares the function that lexes the machine instruction source
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// string.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_CODEGEN_MIRPARSER_MILEXER_H
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#define LLVM_LIB_CODEGEN_MIRPARSER_MILEXER_H
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#include "llvm/ADT/APSInt.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/ADT/STLExtras.h"
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#include <functional>
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namespace llvm {
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class Twine;
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/// A token produced by the machine instruction lexer.
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struct MIToken {
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enum TokenKind {
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// Markers
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Eof,
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Error,
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// Tokens with no info.
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comma,
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equal,
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// Identifier tokens
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Identifier,
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NamedRegister,
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// Other tokens
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IntegerLiteral
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};
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private:
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TokenKind Kind;
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StringRef Range;
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APSInt IntVal;
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public:
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MIToken(TokenKind Kind, StringRef Range) : Kind(Kind), Range(Range) {}
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MIToken(TokenKind Kind, StringRef Range, const APSInt &IntVal)
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: Kind(Kind), Range(Range), IntVal(IntVal) {}
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TokenKind kind() const { return Kind; }
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bool isError() const { return Kind == Error; }
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bool isRegister() const { return Kind == NamedRegister; }
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bool is(TokenKind K) const { return Kind == K; }
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bool isNot(TokenKind K) const { return Kind != K; }
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StringRef::iterator location() const { return Range.begin(); }
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StringRef stringValue() const { return Range; }
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const APSInt &integerValue() const { return IntVal; }
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};
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/// Consume a single machine instruction token in the given source and return
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/// the remaining source string.
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StringRef lexMIToken(
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StringRef Source, MIToken &Token,
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function_ref<void(StringRef::iterator, const Twine &)> ErrorCallback);
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} // end namespace llvm
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#endif
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