[ms-inline asm] Perform field lookups with the dot operator.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166724 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/MC/MCParser/MCAsmParser.h

@@ -37,6 +37,8 @@ public:
   virtual ~MCAsmParserSemaCallback(); 
   virtual void *LookupInlineAsmIdentifier(StringRef Name, void *Loc,
                                           unsigned &Size) = 0;
+  virtual bool LookupInlineAsmField(StringRef Base, StringRef Member,
+                                    unsigned &Offset) = 0;
 };
 
 /// MCAsmParser - Generic assembler parser interface, for use by target specific