[InstCombine] icmp(X | OrC, C) --> icmp(X, 0)

We can eliminate the or operation based on the predicate and the
relation between OrC and C.

sge: X | OrC s>= C --> X s>= 0 iff OrC s>= C s>= 0
sgt: X | OrC s>  C --> X s>= 0 iff OrC s>  C s>= 0
sle: X | OrC s<= C --> X s<  0 iff OrC s>  C s>= 0
slt: X | OrC s<  C --> X s<  0 iff OrC s>= C s>= 0

Alive2 links:
sge: https://alive2.llvm.org/ce/z/W-6FHE
sgt: https://alive2.llvm.org/ce/z/TKK2yJ
sle: https://alive2.llvm.org/ce/z/vURQGM
slt: https://alive2.llvm.org/ce/z/JAsVfw

Related issue: https://github.com/llvm/llvm-project/issues/61538



Signed-off-by: Jun Zhang <jun@junz.org>

Differential Revision: https://reviews.llvm.org/D147597