[AArch64] Set a RealUse for getVectorInstrCost with scalar uses. #138811
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This essentially says that integer extracts from lane 0 will not be free, which considering the use from SLP vectorization is likely true and brings the cost of extracts/inserts closer to where it should ideally be. Most of the tests seem better or are not measuring costs, barring the multiple_reduction.ll which was previously accidentally working but not efficiently.
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See #146526 |
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This essentially says that integer extracts from lane 0 will not be free, which considering the use from SLP vectorization is likely true and brings the cost of extracts/inserts closer to where it should ideally be.
Most of the tests seem better or are not measuring costs, barring the multiple_reduction.ll which was previously accidentally working but not efficiently.