I'm using Mesa and LLVM git snapshots on kernel 4.8.8 on Tonga (R9 380X).
Running Talos public beta gives:

[  220.000810] amdgpu 0000:01:00.0: GPU fault detected: 147 0x0620c001
[  220.000816] amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR  
0x0F33DCC4
[  220.000819] amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS
0x060C0001
[  220.000823] VM fault (0x01, vmid 3) at page 255057092, read from 'TC5'
(0x54433500) (192)
[  220.050610] amdgpu 0000:01:00.0: GPU fault detected: 147 0x02604402
[  220.050619] amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR  
0x0002524C
[  220.050623] amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS
0x06044002
[  220.050628] VM fault (0x02, vmid 3) at page 152140, read from 'TC7'
(0x54433700) (68)
[  220.069652] amdgpu 0000:01:00.0: GPU fault detected: 147 0x07e08002
[  220.069659] amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR  
0x0013E8FC
[  220.069663] amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS
0x06080002
[  220.069666] VM fault (0x02, vmid 3) at page 1304828, read from 'TC11'
(0x54433131) (128)
[  220.134453] amdgpu 0000:01:00.0: GPU fault detected: 147 0x00004802
[  220.134458] amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR  
0x00000000
[  220.134460] amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS
0x0A048002
[  220.134462] VM fault (0x02, vmid 5) at page 0, read from 'TC6' (0x54433600)
(72)
[  220.174059] amdgpu 0000:01:00.0: GPU fault detected: 147 0x0620c001
[  220.174064] amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR  
0x0F03DCC4
[  220.174066] amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS
0x080C0001
[  220.174069] VM fault (0x01, vmid 4) at page 251911364, read from 'TC5'
(0x54433500) (192)
[  220.174290] amdgpu 0000:01:00.0: GPU fault detected: 147 0x07a8c002
[  220.174297] amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR  
0x0013E8F5
[  220.174300] amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS
0x080C0002
[  220.174303] VM fault (0x02, vmid 4) at page 1304821, read from 'TC5'
(0x54433500) (192)

The rendering looks correct, unlike with Vulkan in bug 98783.