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Previously only immediate shifts were in WriteShift. Register shifts were grouped with IALU. Seems likely that immediate shifts would be as fast or faster than register shifts. And that immediate shifts wouldn't be any faster than IALU. So if any deserved to be in their own group it should be register shifts not immediate shifts. Rather than try to flip them let's just add more granularity and give each kind their own class. I've used new names for both to make them unambiguous and to force any downstream implementations to be forced to put correct information in their scheduler models. Reviewed By: evandro Differential Revision: https://reviews.llvm.org/D98911 |
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