3 files changed, 282 insertions, 0 deletions
diff --git a/include/llvm/MC/MCParser/MCAsmLexer.h b/include/llvm/MC/MCParser/MCAsmLexer.h
new file mode 100644
index 0000000000..bec6ede4ae
--- /dev/null
+++ b/include/llvm/MC/MCParser/MCAsmLexer.h
@@ -0,0 +1,161 @@
+//===-- llvm/MC/MCAsmLexer.h - Abstract Asm Lexer Interface -----*- 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_MCASMLEXER_H
+#define LLVM_MC_MCASMLEXER_H
+
+#include "llvm/ADT/StringRef.h"
+#include "llvm/System/DataTypes.h"
+#include "llvm/Support/SMLoc.h"
+
+namespace llvm {
+class MCAsmLexer;
+class MCInst;
+class Target;
+
+/// AsmToken - Target independent representation for an assembler token.
+class AsmToken {
+public:
+  enum TokenKind {
+    // Markers
+    Eof, Error,
+
+    // String values.
+    Identifier,
+    String,
+    
+    // Integer values.
+    Integer,
+    
+    // No-value.
+    EndOfStatement,
+    Colon,
+    Plus, Minus, Tilde,
+    Slash,    // '/'
+    LParen, RParen, LBrac, RBrac, LCurly, RCurly,
+    Star, Comma, Dollar, Equal, EqualEqual,
+    
+    Pipe, PipePipe, Caret, 
+    Amp, AmpAmp, Exclaim, ExclaimEqual, Percent, Hash,
+    Less, LessEqual, LessLess, LessGreater,
+    Greater, GreaterEqual, GreaterGreater
+  };
+
+  TokenKind Kind;
+
+  /// A reference to the entire token contents; this is always a pointer into
+  /// a memory buffer owned by the source manager.
+  StringRef Str;
+
+  int64_t IntVal;
+
+public:
+  AsmToken() {}
+  AsmToken(TokenKind _Kind, StringRef _Str, int64_t _IntVal = 0)
+    : Kind(_Kind), Str(_Str), IntVal(_IntVal) {}
+
+  TokenKind getKind() const { return Kind; }
+  bool is(TokenKind K) const { return Kind == K; }
+  bool isNot(TokenKind K) const { return Kind != K; }
+
+  SMLoc getLoc() const;
+
+  /// getStringContents - Get the contents of a string token (without quotes).
+  StringRef getStringContents() const { 
+    assert(Kind == String && "This token isn't a string!");
+    return Str.slice(1, Str.size() - 1);
+  }
+
+  /// getIdentifier - Get the identifier string for the current token, which
+  /// should be an identifier or a string. This gets the portion of the string
+  /// which should be used as the identifier, e.g., it does not include the
+  /// quotes on strings.
+  StringRef getIdentifier() const {
+    if (Kind == Identifier)
+      return getString();
+    return getStringContents();
+  }
+
+  /// getString - Get the string for the current token, this includes all
+  /// characters (for example, the quotes on strings) in the token.
+  ///
+  /// The returned StringRef points into the source manager's memory buffer, and
+  /// is safe to store across calls to Lex().
+  StringRef getString() const { return Str; }
+
+  // FIXME: Don't compute this in advance, it makes every token larger, and is
+  // also not generally what we want (it is nicer for recovery etc. to lex 123br
+  // as a single token, then diagnose as an invalid number).
+  int64_t getIntVal() const { 
+    assert(Kind == Integer && "This token isn't an integer!");
+    return IntVal; 
+  }
+};
+
+/// MCAsmLexer - Generic assembler lexer interface, for use by target specific
+/// assembly lexers.
+class MCAsmLexer {
+  /// The current token, stored in the base class for faster access.
+  AsmToken CurTok;
+  
+  /// The location and description of the current error
+  SMLoc ErrLoc;
+  std::string Err;
+
+  MCAsmLexer(const MCAsmLexer &);   // DO NOT IMPLEMENT
+  void operator=(const MCAsmLexer &);  // DO NOT IMPLEMENT
+protected: // Can only create subclasses.
+  MCAsmLexer();
+
+  virtual AsmToken LexToken() = 0;
+  
+  void SetError(const SMLoc &errLoc, const std::string &err) {
+    ErrLoc = errLoc;
+    Err = err;
+  }
+  
+public:
+  virtual ~MCAsmLexer();
+
+  /// Lex - Consume the next token from the input stream and return it.
+  ///
+  /// The lexer will continuosly return the end-of-file token once the end of
+  /// the main input file has been reached.
+  const AsmToken &Lex() {
+    return CurTok = LexToken();
+  }
+
+  /// getTok - Get the current (last) lexed token.
+  const AsmToken &getTok() {
+    return CurTok;
+  }
+  
+  /// getErrLoc - Get the current error location
+  const SMLoc &getErrLoc() {
+    return ErrLoc;
+  }
+           
+  /// getErr - Get the current error string
+  const std::string &getErr() {
+    return Err;
+  }
+
+  /// getKind - Get the kind of current token.
+  AsmToken::TokenKind getKind() const { return CurTok.getKind(); }
+
+  /// is - Check if the current token has kind \arg K.
+  bool is(AsmToken::TokenKind K) const { return CurTok.is(K); }
+
+  /// isNot - Check if the current token has kind \arg K.
+  bool isNot(AsmToken::TokenKind K) const { return CurTok.isNot(K); }
+};
+
+} // End llvm namespace
+
+#endif
diff --git a/include/llvm/MC/MCParser/MCAsmParser.h b/include/llvm/MC/MCParser/MCAsmParser.h
new file mode 100644
index 0000000000..843c692148
--- /dev/null
+++ b/include/llvm/MC/MCParser/MCAsmParser.h
@@ -0,0 +1,88 @@
+//===-- llvm/MC/MCAsmParser.h - Abstract Asm Parser Interface ---*- 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_MCASMPARSER_H
+#define LLVM_MC_MCASMPARSER_H
+
+#include "llvm/System/DataTypes.h"
+
+namespace llvm {
+class AsmToken;
+class MCAsmLexer;
+class MCContext;
+class MCExpr;
+class MCStreamer;
+class MCValue;
+class SMLoc;
+class Twine;
+
+/// MCAsmParser - Generic assembler parser interface, for use by target specific
+/// assembly parsers.
+class MCAsmParser {
+  MCAsmParser(const MCAsmParser &);   // DO NOT IMPLEMENT
+  void operator=(const MCAsmParser &);  // DO NOT IMPLEMENT
+protected: // Can only create subclasses.
+  MCAsmParser();
+ 
+public:
+  virtual ~MCAsmParser();
+
+  virtual MCAsmLexer &getLexer() = 0;
+
+  virtual MCContext &getContext() = 0;
+
+  /// getSteamer - Return the output streamer for the assembler.
+  virtual MCStreamer &getStreamer() = 0;
+
+  /// Warning - Emit a warning at the location \arg L, with the message \arg
+  /// Msg.
+  virtual void Warning(SMLoc L, const Twine &Msg) = 0;
+
+  /// Warning - Emit an error at the location \arg L, with the message \arg
+  /// Msg.
+  ///
+  /// \return The return value is always true, as an idiomatic convenience to
+  /// clients.
+  virtual bool Error(SMLoc L, const Twine &Msg) = 0;
+
+  /// Lex - Get the next AsmToken in the stream, possibly handling file
+  /// inclusion first.
+  virtual const AsmToken &Lex() = 0;
+  
+  /// getTok - Get the current AsmToken from the stream.
+  const AsmToken &getTok();
+  
+  /// ParseExpression - Parse an arbitrary expression.
+  ///
+  /// @param Res - The value of the expression. The result is undefined
+  /// on error.
+  /// @result - False on success.
+  virtual bool ParseExpression(const MCExpr *&Res, SMLoc &EndLoc) = 0;
+  bool ParseExpression(const MCExpr *&Res);
+  
+  /// ParseParenExpression - Parse an arbitrary expression, assuming that an
+  /// initial '(' has already been consumed.
+  ///
+  /// @param Res - The value of the expression. The result is undefined
+  /// on error.
+  /// @result - False on success.
+  virtual bool ParseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) = 0;
+
+  /// ParseAbsoluteExpression - Parse an expression which must evaluate to an
+  /// absolute value.
+  ///
+  /// @param Res - The value of the absolute expression. The result is undefined
+  /// on error.
+  /// @result - False on success.
+  virtual bool ParseAbsoluteExpression(int64_t &Res) = 0;
+};
+
+} // End llvm namespace
+
+#endif
diff --git a/include/llvm/MC/MCParser/MCParsedAsmOperand.h b/include/llvm/MC/MCParser/MCParsedAsmOperand.h
new file mode 100644
index 0000000000..7c2f5beb74
--- /dev/null
+++ b/include/llvm/MC/MCParser/MCParsedAsmOperand.h
@@ -0,0 +1,33 @@
+//===-- llvm/MC/MCParsedAsmOperand.h - Asm Parser Operand -------*- 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_MCASMOPERAND_H
+#define LLVM_MC_MCASMOPERAND_H
+
+namespace llvm {
+class SMLoc;
+
+/// MCParsedAsmOperand - This abstract class represents a source-level assembly
+/// instruction operand.  It should be subclassed by target-specific code.  This
+/// base class is used by target-independent clients and is the interface
+/// between parsing an asm instruction and recognizing it.
+class MCParsedAsmOperand {
+public:  
+  MCParsedAsmOperand() {}
+  virtual ~MCParsedAsmOperand() {}
+  
+  /// getStartLoc - Get the location of the first token of this operand.
+  virtual SMLoc getStartLoc() const;
+  /// getEndLoc - Get the location of the last token of this operand.
+  virtual SMLoc getEndLoc() const;
+};
+
+} // end namespace llvm.
+
+#endif