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Nikita Popov 5617405db4 [MemCpyOpt] Don't shorten memset if memcpy operands may be the same
If the memcpy operands are the same (which is allowed since D86815)
then the memcpy is effectively a no-op and the partially overlapping
memset is not dead.

Differential Revision: https://reviews.llvm.org/D89192
2020-10-13 21:19:19 +02:00
..
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