[PATCH] Improve diagnostics for asm immediate constraints and downgrade from error to default-error

[Reid Kleckner]

I'm in favor of the diagnostic change, I wasn't aware of how bad it was.

Does anyone else mind this being a default error warning? I'd prefer a hard error. I don't understand your argument about this diagnostic making it impossible to get "optimal output". It is simply a matter of using a macro instead of an always_inline function.


http://reviews.llvm.org/D7014

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