[llvm] [AMDGPU] Remove setcc by using add/sub carryout (PR #155255)

[via llvm-commits]

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@@ -1089,9 +1089,14 @@ void AMDGPUDAGToDAGISel::SelectUADDO_USUBO(SDNode *N) {
   for (SDNode::user_iterator UI = N->user_begin(), E = N->user_end(); UI != E;
        ++UI)
     if (UI.getUse().getResNo() == 1) {
-      if ((IsAdd && (UI->getOpcode() != ISD::UADDO_CARRY)) ||
-          (!IsAdd && (UI->getOpcode() != ISD::USUBO_CARRY))) {
-        IsVALU = true;
+      if (UI->isMachineOpcode()) {
+        if (UI->getMachineOpcode() !=
+            (IsAdd ? AMDGPU::S_ADD_CO_PSEUDO : AMDGPU::S_SUB_CO_PSEUDO))
+          IsVALU = true;
+        break;
+      } else {
+        if (UI->getOpcode() != (IsAdd ? ISD::UADDO_CARRY : ISD::USUBO_CARRY))
+          IsVALU = true;
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LU-JOHN wrote:

Moved to https://github.com/llvm/llvm-project/pull/159814.  Reason for change put in new PR description.

https://github.com/llvm/llvm-project/pull/155255