[llvm] r196607 - Integrated assembler incorrectly lexes ARM-style comments

[David Peixotto]

Hi Jim,

> > AsmToken AsmLexer::LexIdentifier() {
> > +  bool AllowAtInIdentifier =
> > + !StringRef(MAI.getCommentString()).startswith("@");
> 
> Perhaps move this bool to a class variable initialized early so we don't
> have to query the MAI directly every identifier?

I've attached a patch that makes this change. Ok to commit?
 
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