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Commit fc01b9bd authored by Simon Pilgrim's avatar Simon Pilgrim
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[CostModel][X86] Align v4i64 MUL costs on AVX1 targets with worst case 

Based on worst case of sandybridge (vs btver2 + bdver2) llvm-mca analysis - which is a lot less than what we were predicting (I think based off total uop count).
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