[llvm-dev] Backend Plugins?

[Friedman, Eli via llvm-dev]

On 5/17/2018 10:10 AM, Kenneth Adam Miller via llvm-dev wrote:
> Hello,
>
>
> I've looked around in the documentation, and I can't see anywhere 
> where there is a backend plugin capability for LLVM. I'd like to be 
> able to get the output of the instruction selector along with the LLVM 
> IR, or perhaps instrument that.
>
>
> Is there any capability to have a backend plugin in LLVM at all?

It sounds like you want to write a MachineFunctionPass as a plugin, and 
run it in the middle of the pass pipeline of an existing backend?  No, 
there isn't any support for that; RegisterStandardPasses only works on IR.

-Eli

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