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commit. Part of rdar://13453209 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179325 91177308-0d34-0410-b5e6-96231b3b80d8
182 lines
6.3 KiB
C++
182 lines
6.3 KiB
C++
//===-- llvm/MC/MCTargetAsmParser.h - Target Assembly Parser ----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_MC_TARGETPARSER_H
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#define LLVM_MC_TARGETPARSER_H
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#include "llvm/MC/MCParser/MCAsmParserExtension.h"
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namespace llvm {
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class MCStreamer;
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class StringRef;
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class SMLoc;
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class AsmToken;
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class MCParsedAsmOperand;
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class MCInst;
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template <typename T> class SmallVectorImpl;
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enum AsmRewriteKind {
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AOK_Delete = 0, // Rewrite should be ignored.
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AOK_Align, // Rewrite align as .align.
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AOK_DotOperator, // Rewrite a dot operator expression as an immediate.
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// E.g., [eax].foo.bar -> [eax].8
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AOK_Emit, // Rewrite _emit as .byte.
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AOK_Imm, // Rewrite as $$N.
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AOK_ImmPrefix, // Add $$ before a parsed Imm.
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AOK_Input, // Rewrite in terms of $N.
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AOK_Output, // Rewrite in terms of $N.
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AOK_SizeDirective, // Add a sizing directive (e.g., dword ptr).
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AOK_Skip // Skip emission (e.g., offset/type operators).
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};
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const char AsmRewritePrecedence [] = {
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0, // AOK_Delete
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1, // AOK_Align
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1, // AOK_DotOperator
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1, // AOK_Emit
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3, // AOK_Imm
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3, // AOK_ImmPrefix
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2, // AOK_Input
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2, // AOK_Output
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4, // AOK_SizeDirective
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1 // AOK_Skip
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};
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struct AsmRewrite {
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AsmRewriteKind Kind;
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SMLoc Loc;
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unsigned Len;
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unsigned Val;
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public:
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AsmRewrite(AsmRewriteKind kind, SMLoc loc, unsigned len = 0, unsigned val = 0)
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: Kind(kind), Loc(loc), Len(len), Val(val) {}
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};
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struct ParseInstructionInfo {
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SmallVectorImpl<AsmRewrite> *AsmRewrites;
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ParseInstructionInfo() : AsmRewrites(0) {}
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ParseInstructionInfo(SmallVectorImpl<AsmRewrite> *rewrites)
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: AsmRewrites(rewrites) {}
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~ParseInstructionInfo() {}
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};
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/// MCTargetAsmParser - Generic interface to target specific assembly parsers.
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class MCTargetAsmParser : public MCAsmParserExtension {
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public:
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enum MatchResultTy {
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Match_InvalidOperand,
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Match_MissingFeature,
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Match_MnemonicFail,
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Match_Success,
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FIRST_TARGET_MATCH_RESULT_TY
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};
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private:
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MCTargetAsmParser(const MCTargetAsmParser &) LLVM_DELETED_FUNCTION;
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void operator=(const MCTargetAsmParser &) LLVM_DELETED_FUNCTION;
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protected: // Can only create subclasses.
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MCTargetAsmParser();
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/// AvailableFeatures - The current set of available features.
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unsigned AvailableFeatures;
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/// ParsingInlineAsm - Are we parsing ms-style inline assembly?
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bool ParsingInlineAsm;
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/// SemaCallback - The Sema callback implementation. Must be set when parsing
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/// ms-style inline assembly.
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MCAsmParserSemaCallback *SemaCallback;
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public:
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virtual ~MCTargetAsmParser();
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unsigned getAvailableFeatures() const { return AvailableFeatures; }
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void setAvailableFeatures(unsigned Value) { AvailableFeatures = Value; }
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bool isParsingInlineAsm () { return ParsingInlineAsm; }
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void setParsingInlineAsm (bool Value) { ParsingInlineAsm = Value; }
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void setSemaCallback(MCAsmParserSemaCallback *Callback) {
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SemaCallback = Callback;
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}
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virtual bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc,
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SMLoc &EndLoc) = 0;
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/// ParseInstruction - Parse one assembly instruction.
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///
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/// The parser is positioned following the instruction name. The target
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/// specific instruction parser should parse the entire instruction and
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/// construct the appropriate MCInst, or emit an error. On success, the entire
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/// line should be parsed up to and including the end-of-statement token. On
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/// failure, the parser is not required to read to the end of the line.
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//
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/// \param Name - The instruction name.
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/// \param NameLoc - The source location of the name.
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/// \param Operands [out] - The list of parsed operands, this returns
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/// ownership of them to the caller.
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/// \return True on failure.
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virtual bool ParseInstruction(ParseInstructionInfo &Info, StringRef Name,
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SMLoc NameLoc,
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SmallVectorImpl<MCParsedAsmOperand*> &Operands) = 0;
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/// ParseDirective - Parse a target specific assembler directive
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///
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/// The parser is positioned following the directive name. The target
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/// specific directive parser should parse the entire directive doing or
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/// recording any target specific work, or return true and do nothing if the
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/// directive is not target specific. If the directive is specific for
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/// the target, the entire line is parsed up to and including the
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/// end-of-statement token and false is returned.
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///
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/// \param DirectiveID - the identifier token of the directive.
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virtual bool ParseDirective(AsmToken DirectiveID) = 0;
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/// mnemonicIsValid - This returns true if this is a valid mnemonic and false
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/// otherwise.
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virtual bool mnemonicIsValid(StringRef Mnemonic) = 0;
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/// MatchAndEmitInstruction - Recognize a series of operands of a parsed
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/// instruction as an actual MCInst and emit it to the specified MCStreamer.
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/// This returns false on success and returns true on failure to match.
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///
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/// On failure, the target parser is responsible for emitting a diagnostic
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/// explaining the match failure.
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virtual bool
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MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
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SmallVectorImpl<MCParsedAsmOperand*> &Operands,
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MCStreamer &Out, unsigned &ErrorInfo,
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bool MatchingInlineAsm) = 0;
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/// Allow a target to add special case operand matching for things that
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/// tblgen doesn't/can't handle effectively. For example, literal
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/// immediates on ARM. TableGen expects a token operand, but the parser
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/// will recognize them as immediates.
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virtual unsigned validateTargetOperandClass(MCParsedAsmOperand *Op,
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unsigned Kind) {
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return Match_InvalidOperand;
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}
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/// checkTargetMatchPredicate - Validate the instruction match against
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/// any complex target predicates not expressible via match classes.
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virtual unsigned checkTargetMatchPredicate(MCInst &Inst) {
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return Match_Success;
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}
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virtual void convertToMapAndConstraints(unsigned Kind,
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const SmallVectorImpl<MCParsedAsmOperand*> &Operands) = 0;
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};
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} // End llvm namespace
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#endif
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