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Author SHA1 Message Date
Tim Northover
d0b90ac5a7 DAGCombiner: fix use-counting issue when forming zextload 
DAGCombiner was counting all uses of a load node  when considering whether it's
worth combining into a zextload. Really, it wants to ignore the chain and just
count real uses.

rdar://problem/13896307

llvm-svn: 185419
 2013-07-02 09:58:53 +00:00