llvm / llvm/offload-test-suite
Add offload tests for globallycoherent
@inbelic is already working on this.
Since Aug 24, 2026.
- Dominant language
- C++
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- Avg merge
- 2d 18h
- Merged PRs (30d)
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Description
Add offload test-suite coverage that exercises the runtime behaviour enabled by `globallycoherent`, demonstrating cross-thread-group communication through a UAV.
For example a pattern like: write payload → publish flag → poll flag → read payload. https://godbolt.org/z/3eqxMWsTr
AC:
- [ ] An offload test that uses a `globallycoherent` UAV in a cross-thread-group handshake and checks the consumer observes the producer's write
- [ ] Coverage on both backends as supported by the offload harness
- [ ] The test is structured so the `globallycoherent` qualifier is the load-side differentiator (barriers present to isolate coherence from ordering)
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