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//===-- llvm/MC/MCAsmParser.h - Abstract Asm Parser Interface ---*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_MC_MCPARSER_MCASMPARSER_H
#define LLVM_MC_MCPARSER_MCASMPARSER_H
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/MC/MCParser/AsmLexer.h"
#include "llvm/Support/DataTypes.h"
namespace llvm {
class MCAsmInfo;
class MCAsmLexer;
class MCAsmParserExtension;
class MCContext;
class MCExpr;
class MCInstPrinter;
class MCInstrInfo;
class MCStreamer;
class MCTargetAsmParser;
class SMLoc;
class SMRange;
class SourceMgr;
class Twine;
/// MCAsmParserSemaCallback - Generic Sema callback for assembly parser.
class MCAsmParserSemaCallback {
public:
typedef struct {
void *OpDecl;
bool IsVarDecl;
unsigned Length, Size, Type;
void clear() {
OpDecl = 0;
IsVarDecl = false;
Length = 1;
Size = 0;
Type = 0;
}
} InlineAsmIdentifierInfo;
virtual ~MCAsmParserSemaCallback();
virtual void *LookupInlineAsmIdentifier(StringRef &LineBuf,
InlineAsmIdentifierInfo &Info,
bool IsUnevaluatedContext) = 0;
virtual bool LookupInlineAsmField(StringRef Base, StringRef Member,
unsigned &Offset) = 0;
};
typedef MCAsmParserSemaCallback::InlineAsmIdentifierInfo
InlineAsmIdentifierInfo;
/// MCAsmParser - Generic assembler parser interface, for use by target specific
/// assembly parsers.
class MCAsmParser {
public:
typedef bool (*DirectiveHandler)(MCAsmParserExtension*, StringRef, SMLoc);
typedef std::pair<MCAsmParserExtension*, DirectiveHandler>
ExtensionDirectiveHandler;
private:
MCAsmParser(const MCAsmParser &) LLVM_DELETED_FUNCTION;
void operator=(const MCAsmParser &) LLVM_DELETED_FUNCTION;
MCTargetAsmParser *TargetParser;
unsigned ShowParsedOperands : 1;
protected: // Can only create subclasses.
MCAsmParser();
public:
virtual ~MCAsmParser();
virtual void addDirectiveHandler(StringRef Directive,
ExtensionDirectiveHandler Handler) = 0;
virtual SourceMgr &getSourceManager() = 0;
virtual MCAsmLexer &getLexer() = 0;
virtual MCContext &getContext() = 0;
/// getStreamer - Return the output streamer for the assembler.
virtual MCStreamer &getStreamer() = 0;
MCTargetAsmParser &getTargetParser() const { return *TargetParser; }
void setTargetParser(MCTargetAsmParser &P);
virtual unsigned getAssemblerDialect() { return 0;}
virtual void setAssemblerDialect(unsigned i) { }
bool getShowParsedOperands() const { return ShowParsedOperands; }
void setShowParsedOperands(bool Value) { ShowParsedOperands = Value; }
/// Run - Run the parser on the input source buffer.
virtual bool Run(bool NoInitialTextSection, bool NoFinalize = false) = 0;
virtual void setParsingInlineAsm(bool V) = 0;
virtual bool isParsingInlineAsm() = 0;
/// parseMSInlineAsm - Parse ms-style inline assembly.
virtual bool parseMSInlineAsm(void *AsmLoc, std::string &AsmString,
unsigned &NumOutputs, unsigned &NumInputs,
SmallVectorImpl<std::pair<void *, bool> > &OpDecls,
SmallVectorImpl<std::string> &Constraints,
SmallVectorImpl<std::string> &Clobbers,
const MCInstrInfo *MII,
const MCInstPrinter *IP,
MCAsmParserSemaCallback &SI) = 0;
/// Warning - Emit a warning at the location \p L, with the message \p Msg.
///
/// \return The return value is true, if warnings are fatal.
virtual bool Warning(SMLoc L, const Twine &Msg,
ArrayRef<SMRange> Ranges = None) = 0;
/// Error - Emit an error at the location \p L, with the message \p Msg.
///
/// \return The return value is always true, as an idiomatic convenience to
/// clients.
virtual bool Error(SMLoc L, const Twine &Msg,
ArrayRef<SMRange> Ranges = None) = 0;
/// Lex - Get the next AsmToken in the stream, possibly handling file
/// inclusion first.
virtual const AsmToken &Lex() = 0;
/// getTok - Get the current AsmToken from the stream.
const AsmToken &getTok();
/// \brief Report an error at the current lexer location.
bool TokError(const Twine &Msg, ArrayRef<SMRange> Ranges = None);
/// parseIdentifier - Parse an identifier or string (as a quoted identifier)
/// and set \p Res to the identifier contents.
virtual bool parseIdentifier(StringRef &Res) = 0;
/// \brief Parse up to the end of statement and return the contents from the
/// current token until the end of the statement; the current token on exit
/// will be either the EndOfStatement or EOF.
virtual StringRef parseStringToEndOfStatement() = 0;
/// parseEscapedString - Parse the current token as a string which may include
/// escaped characters and return the string contents.
virtual bool parseEscapedString(std::string &Data) = 0;
/// eatToEndOfStatement - Skip to the end of the current statement, for error
/// recovery.
virtual void eatToEndOfStatement() = 0;
/// parseExpression - Parse an arbitrary expression.
///
/// @param Res - The value of the expression. The result is undefined
/// on error.
/// @result - False on success.
virtual bool parseExpression(const MCExpr *&Res, SMLoc &EndLoc) = 0;
bool parseExpression(const MCExpr *&Res);
/// parsePrimaryExpr - Parse a primary expression.
///
/// @param Res - The value of the expression. The result is undefined
/// on error.
/// @result - False on success.
virtual bool parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) = 0;
/// parseParenExpression - Parse an arbitrary expression, assuming that an
/// initial '(' has already been consumed.
///
/// @param Res - The value of the expression. The result is undefined
/// on error.
/// @result - False on success.
virtual bool parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) = 0;
/// parseAbsoluteExpression - Parse an expression which must evaluate to an
/// absolute value.
///
/// @param Res - The value of the absolute expression. The result is undefined
/// on error.
/// @result - False on success.
virtual bool parseAbsoluteExpression(int64_t &Res) = 0;
/// checkForValidSection - Ensure that we have a valid section set in the
/// streamer. Otherwise, report an error and switch to .text.
virtual void checkForValidSection() = 0;
};
/// \brief Create an MCAsmParser instance.
MCAsmParser *createMCAsmParser(SourceMgr &, MCContext &,
MCStreamer &, const MCAsmInfo &);
} // End llvm namespace
#endif
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