[llvm] [RISCV] Transform fcmp to is.fpclass (PR #120242)

[Yingwei Zheng via llvm-commits]

dtcxzyw wrote:

> > FYI I did similar transformation in CodeGenPrepare: #81572.
> 
> In CodeGenPrepare it is only for `fcInf` || `fcInf | fcNan` right? Aren't we considering the rest of the classifications on purpose?

I mean you can handle your motivating case in CGP.


https://github.com/llvm/llvm-project/pull/120242