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Author SHA1 Message Date
Nadav Rotem 33360d8ae9 After reducing the size of an operation in the DAG we zero-extend the reduced 
bitwidth op back to the original size. If we reduce ANDs then this can cause
an endless loop. This patch changes the ZEXT to ANY_EXTEND if the demanded bits
are equal or smaller than the size of the reduced operation.

llvm-svn: 170505
 2012-12-19 07:39:08 +00:00