X86FrameLowering: No need to mark FP as live-in everywhere

The frame pointer (when used as frame pointer) is a reserved register.
We do not track liveness of reserved registers and hence do not need to
add them to the basic block livein lists.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@304274 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed