[llvm] [ARM] Replace ABS and tABS machine nodes with custom lowering (PR #156717)

[David Green via llvm-commits]

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@@ -20924,16 +20917,17 @@ static SDValue performNegCSelCombine(SDNode *N, SelectionDAG &DAG) {
   SDValue N0 = CSel.getOperand(0);
   SDValue N1 = CSel.getOperand(1);
 
-  // If both of them is not negations, it's not worth the folding as it
+  // If neither of them are negations, it's not worth the folding as it
   // introduces two additional negations while reducing one negation.
   if (!isNegatedInteger(N0) && !isNegatedInteger(N1))
     return SDValue();
 
-  SDValue N0N = getNegatedInteger(N0, DAG);
-  SDValue N1N = getNegatedInteger(N1, DAG);
-
   SDLoc DL(N);
   EVT VT = CSel.getValueType();
+
+  SDValue N0N = DAG.getNegative(N0, DL, VT);
+  SDValue N1N = DAG.getNegative(N1, DL, VT);
+
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davemgreen wrote:

Can you send these changes in another patch?

https://github.com/llvm/llvm-project/pull/156717