[llvm] [InstCombine] Canonicalize the fcmp range check idiom into `fabs + fcmp` (PR #76367)

[Yingwei Zheng via llvm-commits]

dtcxzyw wrote:

> Do you need to pass FMF-flags from the original floating point operations to the new ones?

Done.

https://github.com/llvm/llvm-project/pull/76367