[PATCH] [AArch64] Add v8.1a RDMA extension
t.p.northover at gmail.com
Wed Mar 4 15:07:31 PST 2015
> after deep research I've come up with usage of v1i8, v1i16, v1i32 as valid contents of FPR8, FPR12, FPR32.
The original AArch64 backend went down that path, and I think it was a
mistake. It ended up adding lots of complexity for not much gain.
I think the proposed plan for actually using these scalar instructions
is by enhancing the AArch64AdvSIMDScalarPass to optimise these cases
when they occur.
More information about the llvm-commits