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80a3301b37
...into (ashr (shl (anyext X), ...), ...), which requires one fewer instruction. The (anyext X) can sometimes be simplified too. I didn't do this in DAGCombiner because widening shifts isn't a win on all targets. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199114 91177308-0d34-0410-b5e6-96231b3b80d8