[Bug c++/81474] out of memory on constexpr calculation

[bobk-off at yandex dot ru]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81474

--- Comment #2 from Fedor Bobkov <bobk-off at yandex dot ru> ---
Thread-starting example is intended only for demonstration of out of memory
error on simply example. In real projects out of memory error occurs with much
smaller loops which just use bigger amount of data.

I had got this error on compile-time bilinear downscaling of signed distance
field image. May be it is not proper way to use constexprs but it is very
useful in embedded applications (with small RAM and big ROM (flash) memory).