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36e5af50c1
This replaces a hand written copy loop with a call to memcpy for both zext and sext. For sext, it replaces multiple if/else blocks propagating sign information forward. Now we just do a copy, a sign extension on the last copied word, a memset, and clearUnusedBits. Differential Revision: https://reviews.llvm.org/D32417 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301201 91177308-0d34-0410-b5e6-96231b3b80d8
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