[llvm] [GISel] KnownFPClass ValueTracking fix handling of vectors (PR #143372)

[Matt Arsenault via llvm-commits]

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@@ -758,6 +761,9 @@ void GISelValueTracking::computeKnownFPClass(Register R,
 
   assert(Depth <= MaxAnalysisRecursionDepth && "Limit Search Depth");
 
+  if (!R.isVirtual())
+    return;
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arsenm wrote:

Guard only on COPY handling 

https://github.com/llvm/llvm-project/pull/143372