Fix this bug.
Its not just SGPRs we want to disable, right? Its inline and literal operands too. So the commit title is slightly misleading.
I think it can be the following, which is more generic.
let InsVOP3Base = getIns64<Src0VOP3DPP, Src1VOP3DPP, RegisterOperand<VGPR_32>, 3, 0, HasModifiers, HasModifiers, HasOMod, Src0ModVOP3DPP, Src1ModVOP3DPP, Src2Mod>.ret;