placement: run global placement once if IO placement is provided

[oharboe]

If the computer says yes?

[maliberty]

I don't see a reason to merge gpl and ppl into a single step. Just skip that step if needed.

[oharboe]

I don't see a reason to merge gpl and ppl into a single step. Just skip that step if needed.

Is there any reason to run global placement skip io if pins are placed?

To me this is a single concern spread across two stages that should be one stage.

[maliberty]

No but they are not always placed.

[oharboe]

No but they are not always placed.

Lets talk it over in a future call, no rush.

There is some important information I am missing for this to make sense.