[Target][ARM] Improvements to the VPT Block Insertion Pass
This allows the MVE VPT Block insertion pass to remove VPNOTs in
order to create more complex VPT blocks such as TE, TEET, TETE, etc.
Differential Revision: https://reviews.llvm.org/D75993
Pierre-vh on Mar 9 2020, 9:40 AM.Authored by