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

[Ralf Jung via llvm-commits]

================
@@ -17578,6 +17485,11 @@ of the two arguments. -0.0 is considered to be less than +0.0 for this
 intrinsic. Note that these are the semantics specified in the draft of
 IEEE 754-2019.
----------------
RalfJung wrote:

```suggestion
intrinsic. Note that these are the semantics of maximum specified in
IEEE-754-2019 with the usual :ref:`signaling NaN <floatnan>` non-determinism.
```
For consistency with `maximumNumber`.

(same suggestion for `minimum`)

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