[Issue 20990] Optimizer should move cold branches to the end of the function

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20990

--- Comment #1 from Walter Bright <bugzilla at digitalmars.com> ---
(In reply to Walter Bright from comment #0)
> assert is a cold branch, and DMD move the assert to the end for the example:

I meant it does "not move" the assert.

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