[llvm] [AArch64] Add CodeGen support for FEAT_CPA (PR #105669)

[Alexander Richardson via llvm-commits]

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@@ -11169,9 +11186,14 @@ TargetLowering::LowerCallTo(TargetLowering::CallLoweringInfo &CLI) const {
     MachineFunction &MF = CLI.DAG.getMachineFunction();
     Align HiddenSRetAlign = MF.getFrameInfo().getObjectAlign(DemoteStackIdx);
     for (unsigned i = 0; i < NumValues; ++i) {
-      SDValue Add = CLI.DAG.getNode(ISD::ADD, CLI.DL, PtrVT, DemoteStackSlot,
-                                    CLI.DAG.getConstant(Offsets[i], CLI.DL,
-                                                        PtrVT), Flags);
+      unsigned int AddOpcode = ISD::PTRADD;
+      if (!CLI.DAG.getTarget().shouldPreservePtrArith(
+              CLI.DAG.getMachineFunction().getFunction())) {
+        AddOpcode = ISD::ADD;
+      }
+      SDValue Add = CLI.DAG.getNode(
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arichardson wrote:

getMemBasePlusOffset?

https://github.com/llvm/llvm-project/pull/105669