[llvm-branch-commits] [llvm] [AMDGPU][SDAG] Add ISD::PTRADD DAG combines (PR #142739)

[Shilei Tian via llvm-branch-commits]

================
@@ -14935,6 +14936,52 @@ SDValue SITargetLowering::performAddCombine(SDNode *N,
   return SDValue();
 }
 
+SDValue SITargetLowering::performPtrAddCombine(SDNode *N,
+                                               DAGCombinerInfo &DCI) const {
+  SelectionDAG &DAG = DCI.DAG;
+  EVT VT = N->getValueType(0);
+  SDLoc DL(N);
+  SDValue N0 = N->getOperand(0);
+  SDValue N1 = N->getOperand(1);
+
+  if (N1.getOpcode() == ISD::ADD) {
----------------
shiltian wrote:

bail out early?

https://github.com/llvm/llvm-project/pull/142739
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