[llvm] [llvm] Improve llvm.objectsize computation by computing GEP, alloca and malloc parameters bound (PR #115522)

[Florian Mayer via llvm-commits]

fmayer wrote:

This appears to have caused the PPC failures in a 3 stage ubsan build here: https://lab.llvm.org/buildbot/#/builders/25/builds/4241/steps/10/logs/stdio

I bisected to this change.

https://github.com/llvm/llvm-project/pull/115522