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Author SHA1 Message Date
Nadav Rotem 839a06e9d7 Make ComputeDemandedBits return a deterministic result when computing an AssertZext value. 
In the added testcase the constant 55 was behind an AssertZext of type i1, and ComputeDemandedBits
reported that some of the bits were both known to be one and known to be zero.

Together with Michael Kuperstein <michael.m.kuperstein@intel.com>

llvm-svn: 160305
 2012-07-16 18:34:53 +00:00