[llvm] [DAG] computeKnownFPClass - add ISD::SPLAT_VECTOR handling (PR #189780)

[Simon Pilgrim via llvm-commits]

================
@@ -6076,6 +6113,12 @@ KnownFPClass SelectionDAG::computeKnownFPClass(SDValue Op,
     }
     break;
   }
+
+  case ISD::SPLAT_VECTOR: {
+    Known = computeKnownFPClass(Op.getOperand(0), InterestedClasses, Depth + 1);
+    break;
+  }
+
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RKSimon wrote:

yes, avoid extra empty newlines - also when you fix the merge conflict try to keep it next to the BUILD_VECTOR if you can

https://github.com/llvm/llvm-project/pull/189780