implement memory operand parsing.

llvm-svn: 73875
diff --git a/llvm/tools/llvm-mc/AsmParser.h b/llvm/tools/llvm-mc/AsmParser.h
index 54e3741..670d987 100644
--- a/llvm/tools/llvm-mc/AsmParser.h
+++ b/llvm/tools/llvm-mc/AsmParser.h
@@ -37,6 +37,8 @@
   void EatToEndOfStatement();
   
   bool ParseX86Operand(X86Operand &Op);
+  bool ParseX86MemOperand(X86Operand &Op);
+  bool ParseExpression(int64_t &Res);
 };
 
 } // end namespace llvm