[Bug c++/70277] Improve code generation for large initializer lists

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70277

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I only see a single try {} finally {} generated by the FE.  It looks like
the remaining are generated by gimplification do be able to output CLOBBERs.

I think for large initializer lists it would be good to emit a sorry ()
and have a compile-time limit on their element count - is sth like this
allowed by the standard?  Because I can't see how generally emitting
more optimal code is possible at all...