[PATCH] D70079: [SelectionDAG] Combine U{ADD,SUB}O diamonds into {ADD,SUB}CARRY

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.


================
Comment at: lib/CodeGen/SelectionDAG/DAGCombiner.cpp:2823
+static SDValue combineCarryDiamond(SelectionDAG &DAG, SDValue Carry0,
+                                   SDValue Carry1, SDNode *N) {
+  if (Carry0.getResNo() != 1 || Carry1.getResNo() != 1)
----------------
We handle OR and XOR here but I don't see anything that treats them differently.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D70079/new/

https://reviews.llvm.org/D70079