Comment # 2 on bug 83416 from Michel Dänzer

I get no lockup either, but I do see the same GPUVM protection faults:

 radeon 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x0FF00819

The FF bits make me suspect bits 32-4x of the GPUVM address are getting
clobbered, maybe because of the LLVM backend generating invalid shader code.