AVX-512: DAG lowering for scalar MIN/MAX commutable ops

DAG lowering was missing for the scalar FMINC, FMAXC nodes.
The nodes are generated only in the "unsafe-fp-math" mode.
Added tests.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@275048 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed