[llvm] [X86][SelectionDAG] - Add support for llvm.canonicalize intrinsic (PR #106370)

[Simon Pilgrim via llvm-commits]

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@@ -58143,6 +58144,42 @@ static SDValue combineINTRINSIC_VOID(SDNode *N, SelectionDAG &DAG,
   return SDValue();
 }
 
+SDValue combineCanonicalize(SDNode *Node, SelectionDAG &DAG) {
+  SDValue Operand = Node->getOperand(0);
+  EVT VT = Operand.getValueType();
+  SDLoc dl(Node);
+
+  // Canonicalize scalar variable FP Nodes.
+  SDValue MulNode;
+  SDValue One;
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RKSimon wrote:

Why not `SDValue One = DAG.getNode(ISD::SINT_TO_FP, dl, VT, DAG.getConstant(1, dl, MVT::i32))`?

https://github.com/llvm/llvm-project/pull/106370