RKSimon added a comment.
I meant the X86 execution domain info:
X86InstrInfo::getExecutionDomain(const MachineInstr &MI) const {
  uint16_t domain = (MI.getDesc().TSFlags >> X86II::SSEDomainShift) & 3;
Repository:
  rL LLVM
https://reviews.llvm.org/D50061