(In reply to comment #2)
> Can you bisect this?  It's possible that this commit is responsible:
> 
>     R600/SI: Prefer SALU instructions for bit shift operations
>     
>     All shift operations will be selected as SALU instructions and then
>     if necessary lowered to VALU instructions in the SIFixSGPRCopies pass.
>     
>     This allows us to do more operations on the SALU which will improve
>     performance and is also required for implementing private memory
>     using indirect addressing, since the private memory pointers must stay
>     in the scalar registers.
>     
>     This patch includes some fixes from Matt Arsenault.
>     
>     git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194625
> 91177308-0d34-0410-b5e6-96231b3b80d8

After update to the latest git version everything returned to normal. Thanks.