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Fast-isel generates a COPY_TO_REGCLASS for widening f32 to f64, which is a nop on PPC64. This is needed to keep the register class system happy, but on the fast-isel path it is not removed before emit as it is for DAG select. Ignore this op when emitting instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190795 91177308-0d34-0410-b5e6-96231b3b80d8
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