[llvm] Enable logf128 constant folding for hosts with 128bit long double (PR #96287)

[Khem Raj via llvm-commits]

kraj wrote:

> Thanks for the report. It looks like there is an unguarded use of TLI that might have been nullptr from certain passes. I've added [83a5c7c](https://github.com/llvm/llvm-project/commit/83a5c7cb62e404a713a35445b755cf0109650279) that hopefully addresses it.

thats for quick turn around. this patch fixed the problem

https://github.com/llvm/llvm-project/pull/96287