implement memory operand parsing.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73875 91177308-0d34-0410-b5e6-96231b3b80d8

tools/llvm-mc/AsmParser.h

@@ -37,6 +37,8 @@ private:
   void EatToEndOfStatement();
   
   bool ParseX86Operand(X86Operand &Op);
+  bool ParseX86MemOperand(X86Operand &Op);
+  bool ParseExpression(int64_t &Res);
 };
 
 } // end namespace llvm