[llvm-branch-commits] [llvm] [AMDGPU] Record old VGPR MSBs in the high bits of s_set_vgpr_msb (PR #165035)

[Stanislav Mekhanoshin via llvm-branch-commits]

rampitec wrote:

> Can you say anything at all about _why_ this is done?

This is the new FW requirement.

https://github.com/llvm/llvm-project/pull/165035