07896d44a3
Summary: This PR changes the handling of the emitted kernels when targeting a CPU to be a pointer struct. The old handling emitted a standard function prototype, this necessitated a target specific ABI to call it because the signature differed with the number of arguments. Instead, this PR emits a void pointer to a naturally aligned struct, this is what APIs like `pthreads` assert. This allows us to remove all the complexity around launching host kernels and just pass the argument list.
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