[llvm] [DSE] Consider the aliasing through global variable while checking clobber (PR #120044)

[Haopeng Liu via llvm-commits]

haopliu wrote:

Thanks! Updated the check to use `isIdentifiedFunctionLocal` and `EarliestEscapeAnalysis::isNotCapturedBefore`.

https://github.com/llvm/llvm-project/pull/120044