[llvm] [AMDGPU] Introduce "amdgpu-sw-lower-lds" pass to lower LDS accesses. (PR #87265)

[via llvm-commits]

skc7 wrote:

> LLVM Buildbot has detected a new failure on builder `clang-ppc64le-linux-multistage` running on `ppc64le-clang-multistage-test` while building `llvm` at step 4 "build stage 1".
> 
> Full details are available at: https://lab.llvm.org/buildbot/#/builders/76/builds/2236
> 
> Here is the relevant piece of the build log for the reference

Issue should be fixed by #106039

https://github.com/llvm/llvm-project/pull/87265