This patch tries to fix [[ https://github.com/llvm/llvm-project/issues/56263 | issue ]].
If two **FusionCandidates** are in same level of dominator tree then, they will not be dominates each other. But they are control flow equivalent. To sort those FusionCandidates **nonStrictlyPostDominate** check is needed.
Reviewed By: Narutoworld
Differential Revision: https://reviews.llvm.org/D139993
7f15907acc