[llvm] [DAG] Fold urem(urem(A, BCst), Op1Cst) -> urem(A, Op1Cst) (PR #159517)

[Jay Foad via llvm-commits]

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@@ -5405,6 +5405,14 @@ SDValue DAGCombiner::visitREM(SDNode *N) {
   if (SDValue DivRem = useDivRem(N))
     return DivRem.getValue(1);
 
+  // fold urem(urem(A, BCst), Op1Cst) -> urem(A, Op1Cst)
+  SDValue A;
+  APInt Op1Cst, BCCst;
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jayfoad wrote:

Nit: call it `BCst` to match the comment?

https://github.com/llvm/llvm-project/pull/159517