[llvm] [mlir] [OMPIRBuilder] Hoist alloca's to entry blocks of compiler-emitted GPU reduction functions (PR #181359)

[Pranav Bhandarkar via llvm-commits]

https://github.com/bhandarkar-pranav approved this pull request.

LGTM. Just a minor nit to request a comment where you hoist allocas.

https://github.com/llvm/llvm-project/pull/181359