llvm dev - Jul 2016 - Issuing a warning from llc

I'm wondering if there's a way to issue a warning from llc during a
machine function pass.

I have access to a MachineFunction instance, but I can't find any kind of
context instance that allows me to issue warnings.

The warning is part of a hardware erratum fix. There are possible side-effects
that the user would want to be warned about if they switch on this fix and I
want to issue a warning to this effect.
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You can get the LLVMContext from
MachineFunction->getFunction()->getContext() and call
LLVMContext::diagnose on it. But please use this sparingly, warnings
from the backend are generally not very user-friendly.

On Wed, Jul 20, 2016 at 11:39 AM, Chris.Dewhurst via llvm-dev
<llvm-dev at lists.llvm.org> wrote:
> I'm wondering if there's a way to issue a warning from llc during a
machine
> function pass.
>
> I have access to a MachineFunction instance, but I can't find any kind
of
> context instance that allows me to issue warnings.
>
> The warning is part of a hardware erratum fix. There are possible
> side-effects that the user would want to be warned about if they switch on
> this fix and I want to issue a warning to this effect.
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>