[llvm] `llvm.canonicalize` in common code (PR #142105)

[Simon Pilgrim via llvm-commits]

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@@ -3356,6 +3356,27 @@ bool SelectionDAGLegalize::ExpandNode(SDNode *Node) {
     Results.push_back(Op);
     break;
   }
+  case ISD::FCANONICALIZE: {
+    // This implements llvm.canonicalize.f* by multiplication with 1.0,
+    // as suggested in https://llvm.org/docs/LangRef.html#id2335. It uses
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RKSimon wrote:

can we use `https://llvm.org/docs/LangRef.html#llvm-canonicalize-intrinsic` instead? id### anchors will bitrot 

https://github.com/llvm/llvm-project/pull/142105