I also maintain a list of all asics supporting a p4c (P4 compiler) backend and switches for the P4 community. The list is here:

https://github.com/hesingh/p4-info

The list only tracks hardware that supports P4-16.

Could Cisco let me know when Cisco 1 supports P4-16 and also a p4c backend? Then, I'd like to add the asic to the list - thanks.