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

[Joshua Cranmer via cfe-commits]

https://github.com/jcranmer-intel approved this pull request.

I think, to the degree that there is a live dispute about the proper direction going further, it's not really about the semantics of the intrinsics at this point as it is about the semantics of the different ISD_OPCODES in the SelectionDAG file.

There should be some clarification as to that point, but I think that belongs as part of the codegen changes to actually adhere to the intended documentation, not as part of the documentation change here.

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