[X86][SSE41] Additional tests for extracting zeroable shuffle elements
[X86][SSE41] Additional tests for extracting zeroable shuffle elements

We can currently only match zeroable vector elements of the same size as the shuffle type - these tests demonstrate the problem and a solution will be shortly added in an updated D14261

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@263606 91177308-0d34-0410-b5e6-96231b3b80d8

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