3a9e3865b5
Depends on #174659. This PR adds a new map-type bit to control the fallback behavior when when a pointer lookup fails. For now, this is only meaningful with `RETURN_PARAM`, and can be used for `need_device_ptr` (for which the default is to use `nullptr` as the result when lookup fails), and OpenMP 6.1's `use_device_ptr(fb_nullify)`. Eventually, this can be extended to work with assumed-size maps on `target` constructs, to control what the argument should be set to when lookup fails (the OpenMP spec does not have a way to control that yet). Dependent PR: #170578.
The LLVM/Offload Subproject
The Offload subproject aims at providing tooling, runtimes, and APIs that allow users to execute code on accelerators or other "co-processors" that may or may not match the architecture of their "host". In the long run, all kinds of targets are in scope of this effort, including but not limited to: CPUs, GPUs, FPGAs, AI/ML accelerators, distributed resources, etc.
For OpenMP offload users, the project is ready and fully usable. The final API design is still under development. More content will show up here and on our webpage soon. In the meantime, people are encouraged to participate in our meetings (see below) and check our development board as well as the discussions on Discourse.
Meetings
Every second Wednesday, 7:00 - 8:00am PT, starting Jan 24, 2024. Alternates with the OpenMP in LLVM meeting. invite.ics Meeting Minutes and Agenda