[clang] [clang][CodeGen] Zero init unspecified fields in initializers in C (PR #97121)

[Aaron Ballman via cfe-commits]

AaronBallman wrote:

> @rjmccall and @efriedma-quic, ping for review?
> 
> @AaronBallman suggested this to be included in LLVM 19, which is slated for final release next week. Is the window for backports still open?

No, unfortunately I think it's too late to make 19.1 -- release managers are only taking extremely safe and important fixes, and while this is extremely important, it's a pretty sizable change that needs a good amount of testing. However, if we do a 19.2, this could perhaps qualify.

https://github.com/llvm/llvm-project/pull/97121