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d7aad34bcb
This fixes some of the ridiculously complex code for optimizing the machine model tables that are shared among all processors of a given target. A9 and Swift both use the "special" feature that maps old itinerary classes to new machine model defs. They map different overlapping subsets of instructions, which wasn't handled correctly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183302 91177308-0d34-0410-b5e6-96231b3b80d8
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