[llvm] Use DIExpression::foldConstantMath at the result of a Salvaged expression (PR #71721)

[Shubham Sandeep Rastogi via llvm-commits]

rastogishubham wrote:

@SLTozer Just pinging again in case you missed the updates,
I think I have addressed the compile time issues here: https://github.com/llvm/llvm-project/pull/71721#issuecomment-2099006338





https://github.com/llvm/llvm-project/pull/71721