[llvm] Power of 2 SDValue is known to be power of 2 after dag ops BSWAP/BITREVERSE (PR #182207)

[Simon Pilgrim via llvm-commits]

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@@ -4762,6 +4762,10 @@ bool SelectionDAG::isKnownToBeAPowerOfTwo(SDValue Val,
         isKnownToBeAPowerOfTwo(Val.getOperand(0), /*OrZero=*/false, Depth + 1))
       return true;
     break;
+  case ISD::BSWAP:
+  case ISD::BITREVERSE:
+    isKnownToBeAPowerOfTwo(Val.getOperand(0), /*OrZero=*/false, Depth + 1);
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RKSimon wrote:

Missing return, DemandedElts and OrZero handling

https://github.com/llvm/llvm-project/pull/182207