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Commit 5bc83642 authored by Simon Pilgrim's avatar Simon Pilgrim
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[X86] LowerEXTEND_VECTOR_INREG - add sign_extend_vector_inreg fast path for... 

[X86] LowerEXTEND_VECTOR_INREG - add sign_extend_vector_inreg fast path for all-signbits source values

If the source operand is already all-signbits we don't need to create the sign extended elements - just splat the source element to the destination element width
parent c425cfa9
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