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982ff7f443
These were simply preserving the flags of the original operation, which was too conservative in most cases and incorrect for mul. nsw/nuw may be needed for some combines to cleanup messes when intermediate sext_inregs are introduced later. Tested valid combinations with alive. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@293776 91177308-0d34-0410-b5e6-96231b3b80d8