[PATCH] D90445: [SLP] Make SLPVectorizer to use `llvm.masked.gather` intrinsic
Simon Pilgrim via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Mon Nov 23 06:12:46 PST 2020
RKSimon added a comment.
In D90445#2411311 <https://reviews.llvm.org/D90445#2411311>, @fhahn wrote:
> It appears this is causing a ~2-3% regression on AArch64 for some benchmarks, including `CINT2000/256.bzip2`. Any ideas? It might be caused by underestimating the cost of gather/scatter on AArch64.
Poor target specific costs is likely to be the problem - either for explicit gather intrinsic costs or the scalarization overhead fallback.
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