[llvm] [DAG][X86]added shrd in combineor for bzhiq+shlq+or (PR #125734)

[Simon Pilgrim via llvm-commits]

https://github.com/RKSimon commented:

Thanks - the next step should be to add additional test coverage - different types, maybe some negative cases etc.

https://github.com/llvm/llvm-project/pull/125734