WIP: outline mixed dtype kernel

[swolchok]

No description provided.

[swolchok]

Stack from ghstack (oldest at bottom):

• -> WIP: outline mixed dtype kernel #12219
• Remove unused compute_fun argument to validate_elementwise_fn_inputs #12217
• Fix dtype selective build check in elementwise_util #12183

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/12219

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

❌ 1 New Failure, 2 Unrelated Failures

As of commit 78e450b with merge base 02454eb ():

NEW FAILURE - The following job has failed:

• pull / unittest-editable / linux / linux-job (gh)
  backends/xnnpack/test/ops/test_gelu.py::TestGelu::test_fp16_gelu

BROKEN TRUNK - The following jobs failed but were present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• pull / test-models-linux (mobilebert, portable, linux.2xlarge) / linux-job (gh) (trunk failure)
  ##[error]The operation was canceled.
• pull / test-models-linux (mobilebert, xnnpack-quantization-delegation, linux.2xlarge) / linux-job (gh) (trunk failure)
  ##[error]The operation was canceled.

This comment was automatically generated by Dr. CI and updates every 15 minutes.

[swolchok]

this is not working in local tests on my Mac, but I think the linker there might not do identical code folding, so I sent this out for a double-check with the size test jobs

[swolchok]

looks like this is also regressing size on linux, giving up