[PATCH] D145678: [RISCV] Model interleave and deinterleave shuffles in cost model

[Philip Reames via Phabricator via llvm-commits]

reames added inline comments.


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Comment at: llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp:337
+        auto InterleaveMask = createInterleaveMask(Mask.size() / 2, 2);
+        auto DeinterleaveMask = createStrideMask(Mask[0], 2, Mask.size());
+        // Example sequence:
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reames wrote:
> You need to check that Mask[0] is either 0 or 1 here.  (Or generalize the lowering.)
This remains open.  This is the only blocking item.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D145678/new/

https://reviews.llvm.org/D145678