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[ARM] Flatten identity shuffles through vqdmulh nodes
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Authored by dmgreen on Jan 4 2021, 2:51 PM.

Details

Summary

Given a shuffle(vqdmulh(shuffle, shuffle), we can flatter the shuffles out if they become an identity mask. This can come up during lane interleaving, when we do that better.

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Event Timeline

dmgreen created this revision.Jan 4 2021, 2:51 PM
dmgreen requested review of this revision.Jan 4 2021, 2:51 PM
Herald added a project: Restricted Project. · View Herald TranscriptJan 4 2021, 2:51 PM
samtebbs added inline comments.Jan 8 2021, 6:49 AM
llvm/lib/Target/ARM/ARMISelLowering.cpp
13995

Small typo, regognize -> recognise/recognize

dmgreen updated this revision to Diff 315895.Jan 11 2021, 11:52 AM

Fix typo.

samtebbs accepted this revision.Jan 15 2021, 8:24 AM

Nice 👍🏻

This revision is now accepted and ready to land.Jan 15 2021, 8:24 AM
This revision was automatically updated to reflect the committed changes.