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bf894e5c7c
Drop 8 bytes off of `MCDwarfLoc` by restricting the `Isa`, `Column`, and `Flags` members to appropriate sizes (from `DWARFDebugLine::Row`). Saves a little over 0.5% off the heap of llc with no real functionality change. (I'm looking at `llc` memory usage on `verify-uselistorder.lto.opt.bc`; see r236629 for details.) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241970 91177308-0d34-0410-b5e6-96231b3b80d8
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