[llvm] [AArch64] Signed comparison using CMN is safe when the subtraction is nsw (PR #141993)

[Craig Topper via llvm-commits]

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@@ -3337,8 +3337,13 @@ static bool isLegalArithImmed(uint64_t C) {
   return IsLegal;
 }
 
-static bool cannotBeIntMin(SDValue CheckedVal, SelectionDAG &DAG) {
-  KnownBits KnownSrc = DAG.computeKnownBits(CheckedVal);
+static bool cannotBeIntMin(SDValue Op, SelectionDAG &DAG) {
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topperc wrote:

This function needs to be renamed since it no longer receives the operand and now receives the operation.

https://github.com/llvm/llvm-project/pull/141993