fix build against latest circt

[makslevental]

I had to fiddle to get hls-opt to compile against circt main (i.e., bbe0104fcb1c67190c929c3da8ab2e9f8f0e33fd). in general i'm not sure if you're pinning against some circt version...

[mortbopet]

thanks for this.

in general I'm not sure if you're pinning against some CIRCT version...

Not at the moment. I think @mikeurbach and i are currently just "winging it" and fixing things on the fly. That is obviously not a good solution long term, nor for when new people want to get into the project. So whether the most sane thing here is to add CIRCT as a submodule, or to point to a fixed commit, I'm not sure - but we should definitely discuss it.

for the CIRCT ODM on Wednesday, I'll be talking a bit about CIRCT-HLS. Hopefully that will lead to a discussion about the future of this repo (whether most/all of it should be included into CIRCT, or if it makes sense to spin it off as a stand-alone thing).