[llvm] [TableGen][SchedModel] Add logical combiners for SchedPredicates (PR #172106)

[Sam Elliott via llvm-commits]

lenary wrote:

Non-blocking: We've ended up with several ways of combining tablegen predicates, which maybe we should revisit. Some use specific classes/subclasses, like this, and some use Dags, like AssemblerPredicates.

Some unification might be nice in the future :)





https://github.com/llvm/llvm-project/pull/172106