GPU client slow, warning: Linking two modules of different data layouts

[Graham853]

I have been running the GPU client on Windows 10, with GTX 1070 for some time. When I checked this morning, it wasn't working properly. The nps were very low (like you might expect from CPU) and there was a bunch of these:

warning: Linking two modules of different data layouts: '' is 'e-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024' whereas '<origin>' is 'e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v16:16:16-v24:32:32-v32:32:32-v48:64:64-v64:64:64-v96:128:128-v128:128:128-v192:256:256-v256:256:256-v512:512:512-v1024:1024:1024-n8:16:32:64'

warning: Linking two modules of different target triples: ' is 'spir64' whereas '<origin>' is 'vISA_64'

Attached is a longer extract, with a normal game, then the warnings, then a slow game. Apparently from the number of games uploaded (used to be 900-1000 a day, now 500 and something) this has been going on for a while.

lc0-output.txt