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file. Some of these really don't make sense to test -- we're testing for the *lack* of combining two shuffles into one, presumably because the two would generate better shuffles in the end. But if you look at the generated code shown here, in many cases the generated code is, frankly, terrible. Or we combine any two generated shuffles back into a single instruction! I've left a FIXME to revisit these decisions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218859 91177308-0d34-0410-b5e6-96231b3b80d8
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