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3e77747eba
MachineCopyPropagation doesn't understand super-register liveness well enough to be able to remove implicit defs of super-registers. This fixes a problem in ARM/2012-01-26-CopyPropKills.ll that is exposed by an future TwoAddressInstructionPass change. The KILL instructions are removed before the machine code is emitted. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169060 91177308-0d34-0410-b5e6-96231b3b80d8
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