[llvm] [PowerPC] Deprecate uses of ISD::ADDC/ISD::ADDE/ISD::SUBC/ISD::SUBE (PR #116984)

[Maryam Moghadas via llvm-commits]

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@@ -12028,43 +12031,74 @@ SDValue PPCTargetLowering::LowerFP_EXTEND(SDValue Op, SelectionDAG &DAG) const {
   llvm_unreachable("ERROR:Should return for all cases within swtich.");
 }
 
-SDValue PPCTargetLowering::LowerUaddo(SDValue Op, SelectionDAG &DAG) const {
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maryammo wrote:

The custom lowering for uaddo is recently added by this [commit](https://github.com/llvm/llvm-project/commit/c5ca1b8626db71fa7ac5d851fa3a0710641136ff) ,  as uaddo produces overflow not carry-bit.


https://github.com/llvm/llvm-project/pull/116984