d7e185cca9
This patch handles dependencies specified by the `depend` clause on an OpenMP target construct. It does this much the same way clang does it by materializing an OpenMP `task` that is tagged with the dependencies. The following functions are relevant to this patch - 1) `createTarget` - This function itself is largely unchanged except that it now accepts a vector of `DependData` objects that it simply forwards to `emitTargetCall` 2) `emitTargetCall` - This function has changed now to check if an outer target-task needs to be materialized (i.e if `target` construct has `nowait` or has `depend` clause). If yes, it calls `emitTargetTask` to do all the heavy lifting for creating and dispatching the task. 3) `emitTargetTask` - Bulk of the change is here. See the large comment explaining what it does at the beginning of this function
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.
The project is just starting and the design is still not ironed out. 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