Add sanity check for primitive inplace copy operator

[kiya00]

🚀 Feature

Add a sanity check to ensure the copy_to argument of prims.copy_ is not used as input for any of its subsequent operators

Motivation

Nvfuser's fd.add_output(output, input) API has the rule "do not use the input after it has been updated". We need the same sanity check for prims.copy_(copy_from, copy_to).

cc: @IvanYashchuk @jjsjann123

[jjsjann123]

wondering if this is part of #145 , or just a simple patch to catch the obvious issues?

[kiya00]

wondering if this is part of #145 , or just a simple patch to catch the obvious issues?

I think that's a simple patch and could be removed when the full inplace analysis is ready