e4ebfb5786
This implementation allows mca to model the desired behaviour of the s_waitcnt instruction. This patch also adds the RetireOOO flag to the AMDGPU instructions within the scheduling model. This flag is only used by mca and allows instructions to finish out-of-order which helps mca's simulations more closely model the actual device. Differential Revision: https://reviews.llvm.org/D104730