[llvm] [AArch64][GlobalISel] Bitcast and Build Illegal G_CONCAT_VECTOR Instructions (PR #96492)

[Amara Emerson via llvm-commits]

aemerson wrote:

Thanks, that line of reasoning would be helpful to put into a comment in the code @chuongg3 

Re: Matt's comment: we don't have to check for legality of the outputs right? As long as we get "closer" to legal with this step it should be fine and later iterations can deal with anything illegal.

https://github.com/llvm/llvm-project/pull/96492