[llvm] [LangRef] Clarify specification for float min/max operations (PR #172012)

[Ralf Jung via llvm-commits]

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@@ -17543,9 +17543,8 @@ have the same sign.
 Note that these are the semantics of minimumNumber specified in
 IEEE-754-2019 with the usual :ref:`signaling NaN <floatnan>` exception.
 
-This intrinsic differs from ``llvm.minnum`` in that it is guaranteed to treat
-sNaN the same way as qNaN. ``llvm.minnum`` will instead non-deterministically
-either act like ``llvm.minimumnum`` or return a :ref:`NaN <floatnan>`.
+This intrinsic behaves the same as ``llvm.minnum`` other than its treatment of
+sNaN inputs.
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RalfJung wrote:

This is not true any more with the nsz change for `minnum`, I think? Only the nsz variant of this intrinsic behaves the same as minnum.

https://github.com/llvm/llvm-project/pull/172012