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1118d25d39
1. a target doesn't know how to fold load/stores into copies, or 2. the spiller rewrites the input to a copy to the same register as the dest instead of to the reloaded reg. This will be moved/improved in the near future, but allows elimination of some ancient x86 hacks. This eliminates 92 copies from SMG2000 on X86 and 163 copies from 252.eon. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25922 91177308-0d34-0410-b5e6-96231b3b80d8
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