[llvm] [X86] Fix XOR folding in EmitCmp (PR #210546)

[via llvm-commits]

AZero13 wrote:

Oh yeah, instead of DAG.ReplaceAllUsesWith(IsdNode, &CmpOp);, it's a bit more idiomatic in LLVM to use SDValue explicitly for 1-to-1 value replacements to avoid the pointer:

DAG.ReplaceAllUsesOfValueWith(SDValue(IsdNode, 0), CmpOp).

https://github.com/llvm/llvm-project/pull/210546