[llvm] [DAG] Support saturated truncate (PR #99418)

[Simon Pilgrim via llvm-commits]

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@@ -14930,6 +15061,10 @@ SDValue DAGCombiner::visitTRUNCATE(SDNode *N) {
   if (N0.getOpcode() == ISD::TRUNCATE)
     return DAG.getNode(ISD::TRUNCATE, DL, VT, N0.getOperand(0));
 
+  // fold satruated truncate
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RKSimon wrote:

satruated -> saturated

https://github.com/llvm/llvm-project/pull/99418