Maybe add this to the compiler frontend tests (compiler/testdata/interface.*)

I don't think I can put it in the golden compiler/testdata/*.ll files since the pointer address will change between runs. It does have a test in the main testdata/ directory though.

Oh, we should not be using the pointer address for this.

There doesn't appear to be anything else aside from pointer addresses to allow us to differentiate scopes. Even the String() representation of a scope includes the pointer address. I'd love a more stable suggestion. I asked in #tools on Slack for advice.

Note also this the pointer address of the scope in the compiler, not the pointer at runtime on the device.

If that is the case then we could loop through the SSA and assign numbers to them? Non-deterministic compilation is not acceptable.

Ok. I'll see what I can come up with.

PTAL