1 //===-- llvm/Target/TargetAsmParser.h - Target Assembly Parser --*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #ifndef LLVM_TARGET_TARGETPARSER_H
11 #define LLVM_TARGET_TARGETPARSER_H
13 #include "llvm/MC/MCParser/MCAsmParserExtension.h"
21 class MCParsedAsmOperand;
22 template <typename T> class SmallVectorImpl;
24 /// TargetAsmParser - Generic interface to target specific assembly parsers.
25 class TargetAsmParser : public MCAsmParserExtension {
26 TargetAsmParser(const TargetAsmParser &); // DO NOT IMPLEMENT
27 void operator=(const TargetAsmParser &); // DO NOT IMPLEMENT
28 protected: // Can only create subclasses.
29 TargetAsmParser(const Target &);
31 /// The Target that this machine was created for.
32 const Target &TheTarget;
34 /// The current set of available features.
35 unsigned AvailableFeatures;
38 virtual ~TargetAsmParser();
40 const Target &getTarget() const { return TheTarget; }
42 unsigned getAvailableFeatures() const { return AvailableFeatures; }
43 void setAvailableFeatures(unsigned Value) { AvailableFeatures = Value; }
45 /// ParseInstruction - Parse one assembly instruction.
47 /// The parser is positioned following the instruction name. The target
48 /// specific instruction parser should parse the entire instruction and
49 /// construct the appropriate MCInst, or emit an error. On success, the entire
50 /// line should be parsed up to and including the end-of-statement token. On
51 /// failure, the parser is not required to read to the end of the line.
53 /// \param Name - The instruction name.
54 /// \param NameLoc - The source location of the name.
55 /// \param Operands [out] - The list of parsed operands, this returns
56 /// ownership of them to the caller.
57 /// \return True on failure.
58 virtual bool ParseInstruction(StringRef Name, SMLoc NameLoc,
59 SmallVectorImpl<MCParsedAsmOperand*> &Operands) = 0;
61 /// ParseDirective - Parse a target specific assembler directive
63 /// The parser is positioned following the directive name. The target
64 /// specific directive parser should parse the entire directive doing or
65 /// recording any target specific work, or return true and do nothing if the
66 /// directive is not target specific. If the directive is specific for
67 /// the target, the entire line is parsed up to and including the
68 /// end-of-statement token and false is returned.
70 /// \param DirectiveID - the identifier token of the directive.
71 virtual bool ParseDirective(AsmToken DirectiveID) = 0;
73 /// MatchInstruction - Recognize a series of operands of a parsed instruction
74 /// as an actual MCInst. This returns false and fills in Inst on success and
75 /// returns true on failure to match.
77 MatchInstruction(const SmallVectorImpl<MCParsedAsmOperand*> &Operands,
82 } // End llvm namespace