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//===-- llvm/Target/TargetAsmParser.h - Target Assembly Parser --*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TARGET_TARGETPARSER_H
#define LLVM_TARGET_TARGETPARSER_H
namespace llvm {
class MCInst;
class StringRef;
class Target;
class SMLoc;
class AsmToken;
class MCParsedAsmOperand;
template <typename T> class SmallVectorImpl;
/// TargetAsmParser - Generic interface to target specific assembly parsers.
class TargetAsmParser {
TargetAsmParser(const TargetAsmParser &); // DO NOT IMPLEMENT
void operator=(const TargetAsmParser &); // DO NOT IMPLEMENT
protected: // Can only create subclasses.
TargetAsmParser(const Target &);
/// TheTarget - The Target that this machine was created for.
const Target &TheTarget;
public:
virtual ~TargetAsmParser();
const Target &getTarget() const { return TheTarget; }
/// ParseInstruction - Parse one assembly instruction.
///
/// The parser is positioned following the instruction name. The target
/// specific instruction parser should parse the entire instruction and
/// construct the appropriate MCInst, or emit an error. On success, the entire
/// line should be parsed up to and including the end-of-statement token. On
/// failure, the parser is not required to read to the end of the line.
//
/// \param AP - The current parser object.
/// \param Name - The instruction name.
/// \param Operands [out] - The list of parsed operands, this returns
/// ownership of them to the caller.
/// \return True on failure.
virtual bool ParseInstruction(const StringRef &Name, SMLoc NameLoc,
SmallVectorImpl<MCParsedAsmOperand*> &Operands) = 0;
/// ParseDirective - Parse a target specific assembler directive
///
/// The parser is positioned following the directive name. The target
/// specific directive parser should parse the entire directive doing or
/// recording any target specific work, or return true and do nothing if the
/// directive is not target specific. If the directive is specific for
/// the target, the entire line is parsed up to and including the
/// end-of-statement token and false is returned.
///
/// \param ID - the identifier token of the directive.
virtual bool ParseDirective(AsmToken DirectiveID) = 0;
/// MatchInstruction - Recognize a series of operands of a parsed instruction
/// as an actual MCInst. This returns false and fills in Inst on success and
/// returns true on failure to match.
virtual bool
MatchInstruction(const SmallVectorImpl<MCParsedAsmOperand*> &Operands,
MCInst &Inst) = 0;
};
} // End llvm namespace
#endif
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