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* A select between a constant and zero, when fed by a bit test, can be efficientlyOwen Anderson2010-09-221-0/+13
lowered using a series of shifts. Fixes <rdar://problem/8285015>. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114599 91177308-0d34-0410-b5e6-96231b3b80d8