[clang] [llvm] [InstCombine] fold float clamp pattern into llvm.max/min (PR #159652)

[Matt Arsenault via llvm-commits]

arsenm wrote:

This is a canonicalize introducing transformation. If %arg0 is a denormal, and the transformed result will be flushed but it wouldn't in the original 

https://github.com/llvm/llvm-project/pull/159652