[Issue 19946] In betterC filling an array with a non-zero value fails for types of size > 1 due to missing _memset16/_memset32/etc.

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19946

--- Comment #6 from mhh <maxhaton at gmail.com> ---
I am aware.

I actually think we should have another dmd-only semantic pass just for this in
dmd because the existing code is a complete mess.

The case for array assign operations for example is just a branch in a hundreds
of line visitor member.

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