[PATCH PR94708] rtl combine should consider NaNs when generate fp min/max

[Zhanghaijian (A)]

Hi

This is a simple fix for pr94708.
It's unsafe for rtl combine to generate fp min/max under 
-funsafe-math-optimizations, considering NaNs.
We can only do this kind of transformation under -funsafe-math-optimizations 
and -ffinite-math-only.
Bootstrap and tested on aarch64 Linux platform. No new regression witnessed.

Any suggestion?  

Thanks,
Haijian Zhang

pr94708-v1.patch
Description: pr94708-v1.patch