[llvm] Extend GCC workaround to GCC < 8.4 for llvm::iterator_range ctor (PR #82643)

[Thomas Preud'homme via llvm-commits]

RoboTux wrote:

> Is this https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87748 (8.x regression)?

Yes it is.

> 
> 8.4 is the fourth minor release in the 8.x series. I think it's pretty unfortunate that the issue was noticed and fixed late in the 8.x series. That said, 8.x is also quite old in 2024 and perhaps newer major releases have been better at catching regressions?. @tstellar Is there anything a distribution can help to catch such regressions early?

FYI GCC 8.3 is what Debian Buster is using. It's in LTS support so is only seeing security related updates, hence why it is not using GCC 8.4.

https://github.com/llvm/llvm-project/pull/82643