[llvm] [ConstantFold] Fold `log1p` and `log1pf` when the input parameter is a constant value. (PR #112113)

[Jake Egan via llvm-commits]

jakeegan wrote:

This test fails on the AIX bot, could you take a look?
https://lab.llvm.org/buildbot/#/builders/64/builds/1232/steps/6/logs/FAIL__LLVM__log1p_ll

https://github.com/llvm/llvm-project/pull/112113