[llvm] [AMDGPU] New intrinsic llvm.amdgcn.pops.exiting.wave.id (PR #89612)

[Simon Pilgrim via llvm-commits]

RKSimon wrote:

@jayfoad This is failing on EXPENSIVE_CHECKS builds: https://lab.llvm.org/buildbot/#/builders/16/builds/65957

https://github.com/llvm/llvm-project/pull/89612