Simplify do-while loops that do not use `continue`.

We can omit the continue mask entirely when we know that `continue`
isn't used. This saves a slot, and two ops per loop iteration.

A similar simplification was applied to for loops at .

Change-Id: I6c56a189c4cfeb601d9f738678a7dba257c47b74
Reviewed-by: Brian Osman <>
Auto-Submit: John Stiles <>
Commit-Queue: John Stiles <>
4 files changed