"IP" means a lot of things. A license to produce a chip is one thing, a mask for a particular design is another, and neither one will do much to help you design new x86 products. You can see some stuff in the mask, but it's looking at the chip through the wrong end of a telescope.
I don't know on what level AMD is cooperating with those folks, do you? And even if they did sell the top-level design details, that's not Intel's implementation.
The US government has banned Intel/NVidia/AMD from selling compute units to China for the purposes of supercomputers. AMD must tread carefully cooperating in any way with them.
I don't know on what level AMD is cooperating with those folks, do you? And even if they did sell the top-level design details, that's not Intel's implementation.