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https://reviews.llvm.org/D24924 This improves the code generated for a sequence of AND, ANY_EXT, SRL instructions. This is a targetted fix for this special pattern. The pattern is generated by target independet dag combiner and so a more general fix may not be necessary. If we come across other similar cases, some ideas for handling it are discussed on the code review. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@284983 91177308-0d34-0410-b5e6-96231b3b80d8
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