[bdw][bisected][regression] assertion failure in nir_validate.c
mesa=1632948a is when this problem started.
Looking at the output in https://mesa-ci.01.org/vulkan_main/builds/6415/results/542212238 it looks like there's an assertion failure:
stderr:
...
error: nir_src_bit_size(instr->src[0]) == nir_alu_type_get_type_size(nir_intrinsic_src_type(instr)) (../src/compiler/nir/nir_validate.c:658)
...