tree c1a25eb99ef89b6d7abb57215d513f2f820ad09f
parent da2a77ac0e99d0b16c6c6458936a82e9b9c3f705
author Johannes Doerfert <johannes@jdoerfert.de> 1612039618 -0600
committer Copybara-Service <copybara-worker@google.com> 1616071534 -0700

[OpenMP][DeviceRTL] Extract shuffle idiom and port it to declare variant

The shuffle idiom is differently implemented in our supported targets.
To reduce the "target_impl" file we now move the shuffle idiom in it's
own self-contained header that provides the implementation for AMDGPU
and NVPTX. A fallback can be added later on.

Reviewed By: tianshilei1992

Differential Revision: https://reviews.llvm.org/D95752

GitOrigin-RevId: 66ba494b4974017ba6e42deed138b9fb9ad50af7