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bf57b01543
1. Use shuffle to insert element i1 into vector. The previous implementation was incorrect ( dest_bit OR src_bit , it doesn't clear the bit if src_bit=0 ) 2. Improve shuffle i1 vector, use CVT2MASK if supported instead TRUNCATE. Differential Revision: http://reviews.llvm.org/D23347 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@278623 91177308-0d34-0410-b5e6-96231b3b80d8