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//===- AsmParser.h - Parser for Assembly Files ------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This class declares the parser for assembly files.
//
//===----------------------------------------------------------------------===//
#ifndef ASMPARSER_H
#define ASMPARSER_H
#include "llvm/MC/MCParser/AsmLexer.h"
#include "llvm/MC/MCParser/AsmCond.h"
#include "llvm/MC/MCParser/MCAsmParser.h"
#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/ADT/StringMap.h"
#include <vector>
namespace llvm {
class AsmCond;
class AsmToken;
class MCAsmParserExtension;
class MCContext;
class MCExpr;
class MCInst;
class MCStreamer;
class MCAsmInfo;
class SourceMgr;
class TargetAsmParser;
class Twine;
class AsmParser : public MCAsmParser {
AsmParser(const AsmParser &); // DO NOT IMPLEMENT
void operator=(const AsmParser &); // DO NOT IMPLEMENT
private:
AsmLexer Lexer;
MCContext &Ctx;
MCStreamer &Out;
SourceMgr &SrcMgr;
MCAsmParserExtension *GenericParser;
MCAsmParserExtension *PlatformParser;
TargetAsmParser *TargetParser;
/// This is the current buffer index we're lexing from as managed by the
/// SourceMgr object.
int CurBuffer;
AsmCond TheCondState;
std::vector<AsmCond> TheCondStack;
/// DirectiveMap - This is a table handlers for directives. Each handler is
/// invoked after the directive identifier is read and is responsible for
/// parsing and validating the rest of the directive. The handler is passed
/// in the directive name and the location of the directive keyword.
StringMap<std::pair<MCAsmParserExtension*, DirectiveHandler> > DirectiveMap;
public:
AsmParser(const Target &T, SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
const MCAsmInfo &MAI);
~AsmParser();
bool Run(bool NoInitialTextSection, bool NoFinalize = false);
void AddDirectiveHandler(MCAsmParserExtension *Object,
StringRef Directive,
DirectiveHandler Handler) {
DirectiveMap[Directive] = std::make_pair(Object, Handler);
}
public:
TargetAsmParser &getTargetParser() const { return *TargetParser; }
void setTargetParser(TargetAsmParser &P);
/// @name MCAsmParser Interface
/// {
virtual SourceMgr &getSourceManager() { return SrcMgr; }
virtual MCAsmLexer &getLexer() { return Lexer; }
virtual MCContext &getContext() { return Ctx; }
virtual MCStreamer &getStreamer() { return Out; }
virtual void Warning(SMLoc L, const Twine &Meg);
virtual bool Error(SMLoc L, const Twine &Msg);
const AsmToken &Lex();
bool ParseExpression(const MCExpr *&Res);
virtual bool ParseExpression(const MCExpr *&Res, SMLoc &EndLoc);
virtual bool ParseParenExpression(const MCExpr *&Res, SMLoc &EndLoc);
virtual bool ParseAbsoluteExpression(int64_t &Res);
/// }
private:
bool ParseStatement();
void PrintMessage(SMLoc Loc, const std::string &Msg, const char *Type) const;
/// EnterIncludeFile - Enter the specified file. This returns true on failure.
bool EnterIncludeFile(const std::string &Filename);
void EatToEndOfStatement();
bool ParseAssignment(const StringRef &Name);
bool ParsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc);
bool ParseBinOpRHS(unsigned Precedence, const MCExpr *&Res, SMLoc &EndLoc);
bool ParseParenExpr(const MCExpr *&Res, SMLoc &EndLoc);
/// ParseIdentifier - Parse an identifier or string (as a quoted identifier)
/// and set \arg Res to the identifier contents.
bool ParseIdentifier(StringRef &Res);
// Directive Parsing.
bool ParseDirectiveAscii(bool ZeroTerminated); // ".ascii", ".asciiz"
bool ParseDirectiveValue(unsigned Size); // ".byte", ".long", ...
bool ParseDirectiveFill(); // ".fill"
bool ParseDirectiveSpace(); // ".space"
bool ParseDirectiveSet(); // ".set"
bool ParseDirectiveOrg(); // ".org"
// ".align{,32}", ".p2align{,w,l}"
bool ParseDirectiveAlign(bool IsPow2, unsigned ValueSize);
/// ParseDirectiveSymbolAttribute - Parse a directive like ".globl" which
/// accepts a single symbol (which should be a label or an external).
bool ParseDirectiveSymbolAttribute(MCSymbolAttr Attr);
bool ParseDirectiveELFType(); // ELF specific ".type"
bool ParseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm"
bool ParseDirectiveAbort(); // ".abort"
bool ParseDirectiveInclude(); // ".include"
bool ParseDirectiveIf(SMLoc DirectiveLoc); // ".if"
bool ParseDirectiveElseIf(SMLoc DirectiveLoc); // ".elseif"
bool ParseDirectiveElse(SMLoc DirectiveLoc); // ".else"
bool ParseDirectiveEndIf(SMLoc DirectiveLoc); // .endif
/// ParseEscapedString - Parse the current token as a string which may include
/// escaped characters and return the string contents.
bool ParseEscapedString(std::string &Data);
};
} // end namespace llvm
#endif
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