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Commit e30d29eb authored by Simon Pilgrim's avatar Simon Pilgrim
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[X86][SSE] getFauxShuffleMask - peek through TRUNCATE/AEXT/ZEXT for... 

[X86][SSE] getFauxShuffleMask - peek through TRUNCATE/AEXT/ZEXT for INSERT_VECTOR_ELT(EXTRACT_VECTOR_ELT())

As long we extract from a source vector with smaller elements and we zero-extend the element in the final shuffle mask then we can safely peek through truncations and any/zero-extensions to find the source extraction.
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