[llvm] [KnownFPClass] Refine positive zero and NaN result classes for sqrt (PR #214987)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,142 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
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arsenm wrote:

Old update_test_checks version 

https://github.com/llvm/llvm-project/pull/214987