[llvm] CodeGen: Add ISD::AssertNoFPClass (PR #135946)

[Matt Arsenault via llvm-commits]

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@@ -67,6 +67,12 @@ enum NodeType {
   /// poisoned the assertion will not be true for that value.
   AssertAlign,
 
+  /// AssertNoFPClass - These nodes record if a register contains a float
+  /// value that is known to be not some type.
+  /// NOTE: In case of the source value (or any vector element value) is
+  /// poisoned the assertion will not be true for that value.
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arsenm wrote:

Should include description of the operands, and the second one is a target constant with FPClassTest values 

https://github.com/llvm/llvm-project/pull/135946