[llvm] r174113 - Give the MCStreamer class hierarchy LLVM RTTI facilities for use with

[Carter, Jack]

Jim,

I'm retrofitting my Mips portion of the e_header patch to fit what was done for ARM. A few questions:

Why is ARM here in MCELFStreamer.h? Is this just an early fix?

> +  static bool classof(const MCStreamer *S) {
> +    return S->getKind() == SK_ELFStreamer && S->getKind() == SK_ARMELFStreamer;
> +  }

And I assume that I will want to add an SK_MipsELFStreamer enum variant to MCStreamer.h.

Jack
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