Add MCAsmLexer interface.

 - This provides the AsmLexer interface to the target specific assembly parsers.

llvm-svn: 76460

Author: ddunbar

llvm/include/llvm/MC/MCAsmLexer.h

@@ -0,0 +1,32 @@
+//===-- 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
+
+namespace llvm {
+class MCAsmLexer;
+class MCInst;
+class Target;
+
+/// MCAsmLexer - Generic assembler lexer interface, for use by target specific
+/// assembly lexers.
+class MCAsmLexer {
+  MCAsmLexer(const MCAsmLexer &);   // DO NOT IMPLEMENT
+  void operator=(const MCAsmLexer &);  // DO NOT IMPLEMENT
+protected: // Can only create subclasses.
+  MCAsmLexer();
+ 
+public:
+  virtual ~MCAsmLexer();
+};
+
+} // End llvm namespace
+
+#endif

llvm/include/llvm/MC/MCAsmParser.h

@@ -11,10 +11,7 @@
 #define LLVM_MC_MCASMPARSER_H
 
 namespace llvm {
-class MCAsmParser;
-class MCInst;
-class Target;
-class TargetAsmParser;
+class MCAsmLexer;
 
 /// MCAsmParser - Generic assembler parser interface, for use by target specific
 /// assembly parsers.
@@ -26,6 +23,8 @@ class MCAsmParser {
 
 public:
   virtual ~MCAsmParser();
+
+  virtual MCAsmLexer &getLexer() = 0;
 };
 
 } // End llvm namespace

llvm/lib/MC/CMakeLists.txt

@@ -1,4 +1,5 @@
 add_llvm_library(LLVMMC
+  MCAsmLexer.cpp
   MCAsmParser.cpp
   MCAsmStreamer.cpp
   MCContext.cpp

llvm/lib/MC/MCAsmLexer.cpp

@@ -0,0 +1,18 @@
+//===-- MCAsmLexer.cpp - Abstract Asm Lexer Interface ---------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCAsmLexer.h"
+
+using namespace llvm;
+
+MCAsmLexer::MCAsmLexer() {
+}
+
+MCAsmLexer::~MCAsmLexer() {
+}

llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp

@@ -8,31 +8,55 @@
 //===----------------------------------------------------------------------===//
 
 #include "X86.h"
+#include "llvm/ADT/SmallVector.h"
 #include "llvm/MC/MCAsmParser.h"
 #include "llvm/Target/TargetRegistry.h"
 #include "llvm/Target/TargetAsmParser.h"
 using namespace llvm;
 
 namespace {
+  struct X86Operand {
+  };
 
-class X86ATTAsmParser : public TargetAsmParser {
- public:
-  explicit X86ATTAsmParser(const Target &);
-
-  virtual bool ParseInstruction(MCAsmParser &AP, const char *Name, 
-                                MCInst &Inst);
-};
+  class X86ATTAsmParser : public TargetAsmParser {
+    bool ParseOperand(X86Operand &Op);
+    
+    bool MatchInstruction(const char *Name, 
+                          llvm::SmallVector<X86Operand, 3> &Operands,
+                          MCInst &Inst);
 
+  public:
+    explicit X86ATTAsmParser(const Target &);
+    
+    virtual bool ParseInstruction(MCAsmParser &AP, const char *Name, 
+                                  MCInst &Inst);
+  };
 }
 
 X86ATTAsmParser::X86ATTAsmParser(const Target &T) 
   : TargetAsmParser(T)
 {
 }
 
+bool X86ATTAsmParser::ParseOperand(X86Operand &Op) {
+  return true;
+}
+
+bool 
+X86ATTAsmParser::MatchInstruction(const char *Name, 
+                                  llvm::SmallVector<X86Operand, 3> &Operands,
+                                  MCInst &Inst) {
+  return false;
+}
+
 bool X86ATTAsmParser::ParseInstruction(MCAsmParser &AP, const char *Name, 
                                        MCInst &Inst) {
-  return true;
+  MCAsmLexer &Lexer = AP.getLexer();
+  llvm::SmallVector<X86Operand, 3> Operands;
+  (void) Lexer;
+  (void) Operands;
+  
+  return MatchInstruction(Name, Operands, Inst);
 }
 
 namespace {

llvm/tools/llvm-mc/AsmLexer.h

@@ -14,6 +14,7 @@
 #ifndef ASMLEXER_H
 #define ASMLEXER_H
 
+#include "llvm/MC/MCAsmLexer.h"
 #include "llvm/Support/DataTypes.h"
 #include <string>
 #include <cassert>
@@ -52,7 +53,7 @@ namespace asmtok {
 }
 
 /// AsmLexer - Lexer class for assembly files.
-class AsmLexer {
+class AsmLexer : public MCAsmLexer {
   SourceMgr &SrcMgr;
 
   const char *CurPtr;

llvm/tools/llvm-mc/AsmParser.h

@@ -24,6 +24,7 @@ class MCContext;
 class MCInst;
 class MCStreamer;
 class MCValue;
+class TargetAsmParser;
 
 class AsmParser : MCAsmParser {
 public:
@@ -46,6 +47,8 @@ class AsmParser : MCAsmParser {
 public:
   TargetAsmParser &getTargetParser() const { return TargetParser; }
 
+  virtual MCAsmLexer &getLexer() { return Lexer; }
+
 private:
   bool ParseStatement();