[PATCH] D79231: [X86] Custom legalize v16i64->v16i8 truncate with avx512.
Simon Pilgrim via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Sun May 3 02:39:43 PDT 2020
RKSimon added a comment.
In D79231#2016102 <https://reviews.llvm.org/D79231#2016102>, @craig.topper wrote:
> In D79231#2014842 <https://reviews.llvm.org/D79231#2014842>, @RKSimon wrote:
>
> > Does anything need to be done for truncstore cases?
>
>
> It looks like previously we would form a truncstore using vmovdb after type legalization. After this patch we no longer do that.
Is it still a perf gain if we lose the truncstore? I can't see any truncstore test changes in the patch, but we might just be missing test coverage.
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https://reviews.llvm.org/D79231/new/
https://reviews.llvm.org/D79231
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