New NEC SX-Aurora target

Hi,

We are looking for reviewers for , which registers a target stub for the NEC SX-Aurora Vector Engine.

(Summary)

This patch registers the ‘ve’ target: the NEC SX-Aurora TSUBASA Vector Engine.

This follows up on the announcement on llvm-dev: https://lists.llvm.org/pipermail/llvm-dev/2019-April/131580.html
We have a poster & lightning talk at the upcoming DevMtg: http://llvm.org/devmtg/2019-10/talk-abstracts.html#lit6

A rough roadmap:

  1. Registers, encodings, scalar instructions, clang tooling, …
  2. Vector instruction support through target-specific intrinsics.
  3. Support for LLVM-VP as it becomes available in LLVM upstream.

Thanks

  • Simon