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

[Renato Golin]

Hi David,

I still think this is a bit of a hack:

+  const bool AllowAtInIdentifier = getLexer().getAllowAtInIdentifier();
+  getLexer().setAllowAtInIdentifier(true);
   Lex();
+  getLexer().setAllowAtInIdentifier(AllowAtInIdentifier);

But I'm not too worried about this going in, if others consent to it.

It seems to me that the lexer should know or have a flag, but the @ symbol
for ARM is quite the hack in itself, so making that specific to the lexer
might be going the wrong way altogether.

If others agree, I think it's good to go now.

cheers,
--renato
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