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23b34c287f
don't try to do element insertion for non-zero-index floating point vectors. We don't have any useful patterns or lowering for element insertion into high elements of a floating point vector, and the generic shuffle lowering will end up being better -- namely it will fall back to unpck. But we should try to handle other forms of element insertion before matching unpck patterns. While this doesn't matter much right now, I'm working on a patch that makes unpck matching much more powerful, and that patch will break without this re-ordering. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229306 91177308-0d34-0410-b5e6-96231b3b80d8