[clang] [clang] Fix high memory consumption during pack deduction (PR #88637)

[via cfe-commits]

term-est wrote:

Unfortunately I am unable to generate a MRE at this time. I was hoping for a ~100loc reproducable example, but all tools either spit out hundreds of thousands of lines long preprocessed files or doesn't work at all.

I'll talk with my company to see if they would allow me to share the codebase which causes this specific issue, which is just around 2kloc and quite small.


https://github.com/llvm/llvm-project/pull/88637