[PATCH] D15552: TTI: Allow targets to override getScalarizationOverhead
Matt Arsenault via llvm-commits
llvm-commits at lists.llvm.org
Mon Mar 21 08:08:09 PDT 2016
arsenm added a comment.
In http://reviews.llvm.org/D15552#375044, @hfinkel wrote:
> If the vectors don't exist, shouldn't the insert/extract costs be zero?
The extract cost is zero. I'm not sure a vector insert should be considered as 0, because the only time this would really happen in the ISA is if packing a vector for a store
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