As right now piglit only have one ARB_gl_spirv test with double inputs,
and Im not really sure if intel CI already runs piglit with spirv-tools
available, I tested this patch with my local piglit, that includes all
the va64 tests converted to SPIR-V (that as some already know/complained
about,
Previously, we had two field in shader_info: double_inputs_read and
double_inputs. Presumably, the one was for all double inputs that are
read and the other is all that exist. However, because nir_gather_info
regenerates these two values, there is a possibility, if a variable gets
deleted, that
