mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-11-04 05:17:07 +00:00
19cb7f491f
Allow a target assembly parser to do context sensitive constraint checking on a potential instruction match. This will be used, for example, to handle Thumb2 IT block parsing. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137675 91177308-0d34-0410-b5e6-96231b3b80d8
104 lines
3.7 KiB
C++
104 lines
3.7 KiB
C++
//===-- llvm/MC/MCTargetAsmParser.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_MC_TARGETPARSER_H
|
|
#define LLVM_MC_TARGETPARSER_H
|
|
|
|
#include "llvm/MC/MCParser/MCAsmParserExtension.h"
|
|
|
|
namespace llvm {
|
|
class MCStreamer;
|
|
class StringRef;
|
|
class SMLoc;
|
|
class AsmToken;
|
|
class MCParsedAsmOperand;
|
|
class MCInst;
|
|
template <typename T> class SmallVectorImpl;
|
|
|
|
/// MCTargetAsmParser - Generic interface to target specific assembly parsers.
|
|
class MCTargetAsmParser : public MCAsmParserExtension {
|
|
public:
|
|
enum MatchResultTy {
|
|
Match_ConversionFail,
|
|
Match_InvalidOperand,
|
|
Match_MissingFeature,
|
|
Match_MnemonicFail,
|
|
Match_Success,
|
|
FIRST_TARGET_MATCH_RESULT_TY
|
|
};
|
|
|
|
private:
|
|
MCTargetAsmParser(const MCTargetAsmParser &); // DO NOT IMPLEMENT
|
|
void operator=(const MCTargetAsmParser &); // DO NOT IMPLEMENT
|
|
protected: // Can only create subclasses.
|
|
MCTargetAsmParser();
|
|
|
|
/// AvailableFeatures - The current set of available features.
|
|
unsigned AvailableFeatures;
|
|
|
|
public:
|
|
virtual ~MCTargetAsmParser();
|
|
|
|
unsigned getAvailableFeatures() const { return AvailableFeatures; }
|
|
void setAvailableFeatures(unsigned Value) { AvailableFeatures = Value; }
|
|
|
|
virtual bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc,
|
|
SMLoc &EndLoc) = 0;
|
|
|
|
/// 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 Name - The instruction name.
|
|
/// \param NameLoc - The source location of the name.
|
|
/// \param Operands [out] - The list of parsed operands, this returns
|
|
/// ownership of them to the caller.
|
|
/// \return True on failure.
|
|
virtual bool ParseInstruction(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 DirectiveID - the identifier token of the directive.
|
|
virtual bool ParseDirective(AsmToken DirectiveID) = 0;
|
|
|
|
/// MatchAndEmitInstruction - Recognize a series of operands of a parsed
|
|
/// instruction as an actual MCInst and emit it to the specified MCStreamer.
|
|
/// This returns false on success and returns true on failure to match.
|
|
///
|
|
/// On failure, the target parser is responsible for emitting a diagnostic
|
|
/// explaining the match failure.
|
|
virtual bool
|
|
MatchAndEmitInstruction(SMLoc IDLoc,
|
|
SmallVectorImpl<MCParsedAsmOperand*> &Operands,
|
|
MCStreamer &Out) = 0;
|
|
|
|
/// checkTargetMatchPredicate - Validate the instruction match against
|
|
/// any complex target predicates not expressible via match classes.
|
|
virtual unsigned checkTargetMatchPredicate(MCInst &Inst) {
|
|
return Match_Success;
|
|
}
|
|
|
|
};
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|