[llvm] CodeGen: Strengthen definition of F{MIN|MAX}NUM_IEEE nodes (PR #85195)

[Jay Foad via llvm-commits]

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@@ -971,10 +971,16 @@ enum NodeType {
   FMINNUM,
   FMAXNUM,
 
-  /// FMINNUM_IEEE/FMAXNUM_IEEE - Perform floating-point minimum or maximum on
-  /// two values, following the IEEE-754 2008 definition. This differs from
-  /// FMINNUM/FMAXNUM in the handling of signaling NaNs. If one input is a
-  /// signaling NaN, returns a quiet NaN.
+  /// FMINNUM_IEEE/FMAXNUM_IEEE - Perform floating-point minimumNumber or
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jayfoad wrote:

Can we make this comment and the one in `GenericOpcodes.td` identical? I feel like I'm playing spot the difference trying to review this.

https://github.com/llvm/llvm-project/pull/85195