[clang] [flang] [llvm] [flang] Add -finit-local= to initialize automatic variables (PR #216164)

[Daniel Chen via cfe-commits]

DanielCChen wrote:

> Do you consider this PR ready to move out of draft? If it stays a draft for now, would you like reviewers to keep leaving comments?

One of the reasons I keep this PR in the draft mode is that I still need to discuss with the author of https://github.com/llvm/llvm-project/pull/159788 to see how we will collaborate with the two PRs. At the same time, I would love to receive review comments on the draft so I can patch the holes of this PR.


> Several review rounds have produced substantive findings and follow-up changes, so the patch set may still be evolving. If you're still iterating, I'll wait until you mark it Ready for review before another pass.

I really appreciate the thorough review and testing! 
It indeed improved the PR a lot! 
As you may have noticed, I marked the comments that I have addressed with a thumb up emoji. For those that don't have the emoji mark, I haven't gotten to them yet, but I will. 
Since some of the comments are independent to others, I will be grateful if you can verify the ones that I have addressed and see if there are other holes within that area.

https://github.com/llvm/llvm-project/pull/216164