[swift-dev] deprecating -Ounchecked

[Slava Pestov]

> On Nov 3, 2017, at 8:31 AM, Erik Eckstein via swift-dev <swift-dev at swift.org> wrote:
> 
> So if we replace Ounchecked with an option -unsafe-remove-checks (similar to -assume-single-threaded), as Johannes suggested, this is more like a “at your own risk” thing (regarding performance). For example, it might happen that users see perf regressions from one release to another, using this option.

I would suggest going further and removing the code for -unsafe-remove-checks altogether. Even untested code has a cost in terms of maintainability.

Slava
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