[SYCL] Add basic tests for non-uniform groups

[Pennycook]

Tests for intel/llvm#8202.

[Pennycook]

@steffenlarsen - What's the new magic for running clang-format? I tried this, but it doesn't seem to be obeying the expected formatting...

git diff -U0 --no-color HEAD^ | llvm/clang/tools/clang-format/clang-format-diff.py -p1 -i

[steffenlarsen]

@steffenlarsen - What's the new magic for running clang-format? I tried this, but it doesn't seem to be obeying the expected formatting...

git diff -U0 --no-color HEAD^ | llvm/clang/tools/clang-format/clang-format-diff.py -p1 -i

That is what I normally use, but sometimes different versions of clang-format may disagree on certain scenarios. You could try building a new version of clang-format and adding it to your PATH or just apply the suggested format by hand.

[Pennycook]

You could try building a new version of clang-format and adding it to your PATH or just apply the suggested format by hand.

Good idea. Building a new version of clang-format fixed it.

[steffenlarsen]

LGTM!

[Pennycook]

Converting this to draft to prevent it from being merged, same as intel/llvm#8202.

[Pennycook]

@steffenlarsen, @JackAKirk - These should be fixed, now, and aligned with the latest code over at intel/llvm#8202.

[Pennycook]

@cperkinsintel, @steffenlarsen: I tried to make it so these won't run on CPU, but the failure logs in intel/llvm#8202 suggest it's still failing on the CPU. Have I got the UNSUPPORTED syntax wrong?

[steffenlarsen]

@cperkinsintel, @steffenlarsen: I tried to make it so these won't run on CPU, but the failure logs in intel/llvm#8202 suggest it's still failing on the CPU. Have I got the UNSUPPORTED syntax wrong?

Syntax looks right and since you're only using GPU_RUN_PLACEHOLDER it should not even try to run these on CPU. It may have just been a CI bug so I've restarted the verification on your PR.

[cperkinsintel]

These tests are for a new feature. They have successfully run on the feature PR here: intel/llvm#8202