If the source of a move is in spill slot, the reload may be folded to essentially a load from stack slot. It's ok to mark the stack slot value as available for reuse. But it should not be clobbered since the destination of the move is live.
If the source of a move is in spill slot, the reload may be folded to essentially a load from stack slot. It's ok to mark the stack slot value as available for reuse. But it should not be clobbered since the destination of the move is live.

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@41109 91177308-0d34-0410-b5e6-96231b3b80d8

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