MCAsmParser.h revision 36b56886974eae4f9c5ebc96befd3e7bfe5de338
1//===-- llvm/MC/MCAsmParser.h - Abstract Asm Parser Interface ---*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef LLVM_MC_MCPARSER_MCASMPARSER_H 11#define LLVM_MC_MCPARSER_MCASMPARSER_H 12 13#include "llvm/ADT/ArrayRef.h" 14#include "llvm/ADT/StringRef.h" 15#include "llvm/MC/MCParser/AsmLexer.h" 16#include "llvm/Support/DataTypes.h" 17 18namespace llvm { 19class MCAsmInfo; 20class MCAsmLexer; 21class MCAsmParserExtension; 22class MCContext; 23class MCExpr; 24class MCInstPrinter; 25class MCInstrInfo; 26class MCStreamer; 27class MCTargetAsmParser; 28class SMLoc; 29class SMRange; 30class SourceMgr; 31class Twine; 32 33/// MCAsmParserSemaCallback - Generic Sema callback for assembly parser. 34class MCAsmParserSemaCallback { 35public: 36 typedef struct { 37 void *OpDecl; 38 bool IsVarDecl; 39 unsigned Length, Size, Type; 40 41 void clear() { 42 OpDecl = 0; 43 IsVarDecl = false; 44 Length = 1; 45 Size = 0; 46 Type = 0; 47 } 48 } InlineAsmIdentifierInfo; 49 50 virtual ~MCAsmParserSemaCallback(); 51 virtual void *LookupInlineAsmIdentifier(StringRef &LineBuf, 52 InlineAsmIdentifierInfo &Info, 53 bool IsUnevaluatedContext) = 0; 54 55 virtual bool LookupInlineAsmField(StringRef Base, StringRef Member, 56 unsigned &Offset) = 0; 57}; 58 59typedef MCAsmParserSemaCallback::InlineAsmIdentifierInfo 60 InlineAsmIdentifierInfo; 61 62/// MCAsmParser - Generic assembler parser interface, for use by target specific 63/// assembly parsers. 64class MCAsmParser { 65public: 66 typedef bool (*DirectiveHandler)(MCAsmParserExtension*, StringRef, SMLoc); 67 typedef std::pair<MCAsmParserExtension*, DirectiveHandler> 68 ExtensionDirectiveHandler; 69 70private: 71 MCAsmParser(const MCAsmParser &) LLVM_DELETED_FUNCTION; 72 void operator=(const MCAsmParser &) LLVM_DELETED_FUNCTION; 73 74 MCTargetAsmParser *TargetParser; 75 76 unsigned ShowParsedOperands : 1; 77 78protected: // Can only create subclasses. 79 MCAsmParser(); 80 81public: 82 virtual ~MCAsmParser(); 83 84 virtual void addDirectiveHandler(StringRef Directive, 85 ExtensionDirectiveHandler Handler) = 0; 86 87 virtual SourceMgr &getSourceManager() = 0; 88 89 virtual MCAsmLexer &getLexer() = 0; 90 91 virtual MCContext &getContext() = 0; 92 93 /// getStreamer - Return the output streamer for the assembler. 94 virtual MCStreamer &getStreamer() = 0; 95 96 MCTargetAsmParser &getTargetParser() const { return *TargetParser; } 97 void setTargetParser(MCTargetAsmParser &P); 98 99 virtual unsigned getAssemblerDialect() { return 0;} 100 virtual void setAssemblerDialect(unsigned i) { } 101 102 bool getShowParsedOperands() const { return ShowParsedOperands; } 103 void setShowParsedOperands(bool Value) { ShowParsedOperands = Value; } 104 105 /// Run - Run the parser on the input source buffer. 106 virtual bool Run(bool NoInitialTextSection, bool NoFinalize = false) = 0; 107 108 virtual void setParsingInlineAsm(bool V) = 0; 109 virtual bool isParsingInlineAsm() = 0; 110 111 /// parseMSInlineAsm - Parse ms-style inline assembly. 112 virtual bool parseMSInlineAsm(void *AsmLoc, std::string &AsmString, 113 unsigned &NumOutputs, unsigned &NumInputs, 114 SmallVectorImpl<std::pair<void *, bool> > &OpDecls, 115 SmallVectorImpl<std::string> &Constraints, 116 SmallVectorImpl<std::string> &Clobbers, 117 const MCInstrInfo *MII, 118 const MCInstPrinter *IP, 119 MCAsmParserSemaCallback &SI) = 0; 120 121 /// Note - Emit a note at the location \p L, with the message \p Msg. 122 virtual void Note(SMLoc L, const Twine &Msg, 123 ArrayRef<SMRange> Ranges = None) = 0; 124 125 /// Warning - Emit a warning at the location \p L, with the message \p Msg. 126 /// 127 /// \return The return value is true, if warnings are fatal. 128 virtual bool Warning(SMLoc L, const Twine &Msg, 129 ArrayRef<SMRange> Ranges = None) = 0; 130 131 /// Error - Emit an error at the location \p L, with the message \p Msg. 132 /// 133 /// \return The return value is always true, as an idiomatic convenience to 134 /// clients. 135 virtual bool Error(SMLoc L, const Twine &Msg, 136 ArrayRef<SMRange> Ranges = None) = 0; 137 138 /// Lex - Get the next AsmToken in the stream, possibly handling file 139 /// inclusion first. 140 virtual const AsmToken &Lex() = 0; 141 142 /// getTok - Get the current AsmToken from the stream. 143 const AsmToken &getTok(); 144 145 /// \brief Report an error at the current lexer location. 146 bool TokError(const Twine &Msg, ArrayRef<SMRange> Ranges = None); 147 148 /// parseIdentifier - Parse an identifier or string (as a quoted identifier) 149 /// and set \p Res to the identifier contents. 150 virtual bool parseIdentifier(StringRef &Res) = 0; 151 152 /// \brief Parse up to the end of statement and return the contents from the 153 /// current token until the end of the statement; the current token on exit 154 /// will be either the EndOfStatement or EOF. 155 virtual StringRef parseStringToEndOfStatement() = 0; 156 157 /// parseEscapedString - Parse the current token as a string which may include 158 /// escaped characters and return the string contents. 159 virtual bool parseEscapedString(std::string &Data) = 0; 160 161 /// eatToEndOfStatement - Skip to the end of the current statement, for error 162 /// recovery. 163 virtual void eatToEndOfStatement() = 0; 164 165 /// parseExpression - Parse an arbitrary expression. 166 /// 167 /// @param Res - The value of the expression. The result is undefined 168 /// on error. 169 /// @result - False on success. 170 virtual bool parseExpression(const MCExpr *&Res, SMLoc &EndLoc) = 0; 171 bool parseExpression(const MCExpr *&Res); 172 173 /// parsePrimaryExpr - Parse a primary expression. 174 /// 175 /// @param Res - The value of the expression. The result is undefined 176 /// on error. 177 /// @result - False on success. 178 virtual bool parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) = 0; 179 180 /// parseParenExpression - Parse an arbitrary expression, assuming that an 181 /// initial '(' has already been consumed. 182 /// 183 /// @param Res - The value of the expression. The result is undefined 184 /// on error. 185 /// @result - False on success. 186 virtual bool parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) = 0; 187 188 /// parseAbsoluteExpression - Parse an expression which must evaluate to an 189 /// absolute value. 190 /// 191 /// @param Res - The value of the absolute expression. The result is undefined 192 /// on error. 193 /// @result - False on success. 194 virtual bool parseAbsoluteExpression(int64_t &Res) = 0; 195 196 /// checkForValidSection - Ensure that we have a valid section set in the 197 /// streamer. Otherwise, report an error and switch to .text. 198 virtual void checkForValidSection() = 0; 199}; 200 201/// \brief Create an MCAsmParser instance. 202MCAsmParser *createMCAsmParser(SourceMgr &, MCContext &, 203 MCStreamer &, const MCAsmInfo &); 204 205} // End llvm namespace 206 207#endif 208