Check superreg/subreg defs of an instruction when checking for
dependencies. This may cause some regressions, but better be
safe than sorry. Changed tests are affected because of the
implicit-defs of the superregs.
Differential Revision: https://reviews.llvm.org/D152943
We form VOPD instructions in the GCNCreateVOPD pass by combining
back-to-back component instructions. There are strict register
constraints for creating a legal VOPD, namely that the matching operands
(e.g. src0x and src0y, src1x and src1y) must be in different register
banks. We add a PostRA scheduler
mutation to put possible VOPD components back-to-back.
Depends on D128442, D128270
Reviewed By: #amdgpu, rampitec
Differential Revision: https://reviews.llvm.org/D128656
