[PATCH] D78587: [ARM] Always replace FP16 bitcasts with VMOVhr or VMOVrh

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: SjoerdMeijer, efriedma, ostannard.
Herald added subscribers: danielkiss, hiraditya, kristof.beyls.
dmgreen retitled this revision from "[ARM] Always replace FP16 bitcasts with VMOVhr or VMOVhr" to "[ARM] Always replace FP16 bitcasts with VMOVhr or VMOVrh".

This changes the logic with lowering fp16 bitcasts to always produce either a VMOVhr or a VMOVrh, instead of only trying to do it with certain surrounding nodes. To perform the same optimisations demand bits and known bits information has been added for them.


https://reviews.llvm.org/D78587

Files:
  llvm/lib/Target/ARM/ARMISelLowering.cpp
  llvm/test/CodeGen/Thumb2/mve-intrinsics/vminvq.ll

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