1f6aa90386
Added the following helpers:
depctr_hold_cnt(...)
depctr_sa_sdst(...)
depctr_va_vdst(...)
depctr_va_sdst(...)
depctr_va_ssrc(...)
depctr_va_vcc(...)
depctr_vm_vsrc(...)
Differential Revision: https://reviews.llvm.org/D123022