[llvm-branch-commits] [clang] release/18.x: backport PR84230 (PR #86106)

[Aaron Ballman via llvm-branch-commits]

AaronBallman wrote:

> Hi @antoniofrighetto (or anyone else). If you would like to add a note about this fix in the release notes (completely optional). Please reply to this comment with a one or two sentence description of the fix.

How about we go with something along the lines of:

Fixed a Clang 18.x regression which increased binary size and stack usage with `-ftrivial-auto-var-init`. Fixes #GH84178.

https://github.com/llvm/llvm-project/pull/86106