Revert "LegalizeDAG: Fix and improve FCOPYSIGN/FABS legalization"

Accidental commit, needs review first.

This reverts commit r242107.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242108 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed