tree 72fe2cca838661e7f02ffca5fb924bc9489057f7
parent 966ae762229f9d77e6d9f0ab4220e4c2bf5f4fc4
author John Brawn <john.brawn@arm.com> 1584467884 +0000
committer John Brawn <john.brawn@arm.com> 1585931810 +0100

[ARM] Avoid pointless vrev of element-wise vmov

If we have an element-wise vmov immediate instruction then a subsequent vrev
with width greater or equal to the vmov element width, then that vrev won't do
anything. Add a DAG combine to convert bitcasts that would become such vrevs
into vector_reg_casts instead.

Differential Revision: https://reviews.llvm.org/D76514