Jakob Stoklund Olesen d0930e03c1 Represent sentinel slot indexes with a null pointer.
This is much faster than using a pointer to a ManagedStatic object accessed with
a function call. The greedy register allocator is 5% faster overall just from
the SlotIndex default constructor savings.

llvm-svn: 126925
2011-03-03 05:40:04 +00:00
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2010-11-15 03:21:41 +00:00