[PATCH] D100486: [COST]Improve cost model for shuffles in SLP.

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added a comment.

Thanks for looking at this - this is well overdue!



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Comment at: llvm/lib/Target/X86/X86TargetTransformInfo.cpp:1192
+        // Try to perform better estimation of the permutation.
+        // 1. Split the source/destination vectors into real registers.
+        // 2. Do the mask analysis to identify which real registers are
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We already have something similar in DAGTypeLegalizer::SplitVecRes_VECTOR_SHUFFLE - do you think we could have a single version of the code some place? 


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  https://reviews.llvm.org/D100486/new/

https://reviews.llvm.org/D100486