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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 <vector>
-#include "AsmLexer.h"
-#include "AsmCond.h"
-#include "llvm/MC/MCAsmParser.h"
-#include "llvm/MC/MCSectionMachO.h"
-#include "llvm/MC/MCStreamer.h"
-#include "llvm/MC/MCAsmInfo.h"
-#include "llvm/ADT/StringMap.h"
-
-namespace llvm {
-class AsmCond;
-class AsmToken;
-class MCContext;
-class MCExpr;
-class MCInst;
-class MCStreamer;
-class MCAsmInfo;
-class MCValue;
-class SourceMgr;
-class TargetAsmParser;
-class Twine;
-
-class AsmParser : public MCAsmParser {
-private:
- AsmLexer Lexer;
- MCContext &Ctx;
- MCStreamer &Out;
- SourceMgr &SrcMgr;
- 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;
-
- // FIXME: Figure out where this should leave, the code is a copy of that which
- // is also used by TargetLoweringObjectFile.
- mutable void *SectionUniquingMap;
-
- /// 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<bool(AsmParser::*)(StringRef, SMLoc)> DirectiveMap;
-public:
- AsmParser(SourceMgr &_SM, MCContext &_Ctx, MCStreamer &_Out,
- const MCAsmInfo &_MAI);
- ~AsmParser();
-
- bool Run();
-
-
- void AddDirectiveHandler(StringRef Directive,
- bool (AsmParser::*Handler)(StringRef, SMLoc)) {
- DirectiveMap[Directive] = Handler;
- }
-public:
- TargetAsmParser &getTargetParser() const { return *TargetParser; }
- void setTargetParser(TargetAsmParser &P) { TargetParser = &P; }
-
- /// @name MCAsmParser Interface
- /// {
-
- 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:
- MCSymbol *CreateSymbol(StringRef Name);
-
- // FIXME: See comment on SectionUniquingMap.
- const MCSection *getMachOSection(const StringRef &Segment,
- const StringRef &Section,
- unsigned TypeAndAttributes,
- unsigned Reserved2,
- SectionKind Kind) const;
-
- bool ParseStatement();
-
- bool TokError(const char *Msg);
-
- 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);
-
- bool ParseConditionalAssemblyDirectives(StringRef Directive,
- SMLoc DirectiveLoc);
- 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 ParseDirectiveDarwinSection(); // Darwin specific ".section".
- bool ParseDirectiveSectionSwitch(const char *Segment, const char *Section,
- unsigned TAA = 0, unsigned ImplicitAlign = 0,
- unsigned StubSize = 0);
- 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(MCStreamer::SymbolAttr Attr);
- bool ParseDirectiveDarwinSymbolDesc(); // Darwin specific ".desc"
- bool ParseDirectiveDarwinLsym(); // Darwin specific ".lsym"
-
- bool ParseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm"
- bool ParseDirectiveDarwinZerofill(); // Darwin specific ".zerofill"
-
- // Darwin specific ".subsections_via_symbols"
- bool ParseDirectiveDarwinSubsectionsViaSymbols();
- // Darwin specific .dump and .load
- bool ParseDirectiveDarwinDumpOrLoad(SMLoc IDLoc, bool IsDump);
-
- 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
-
- bool ParseDirectiveFile(StringRef, SMLoc DirectiveLoc); // ".file"
- bool ParseDirectiveLine(StringRef, SMLoc DirectiveLoc); // ".line"
- bool ParseDirectiveLoc(StringRef, SMLoc DirectiveLoc); // ".loc"
-
- /// 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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