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[Build] Do not regenerate code endlessly without XPU (#140438)

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Before this change, if one builds PyTorch without XPU build process will
be perpetually regenerating code because of the reference to non-existing
file, that will make autograd codegened files always out of date, see part of the `ninja -d explain torch_cpu` output:
```
ninja explain: output ../torch/csrc/inductor/aoti_torch/generated/c_shim_xpu.cpp doesn't exist
ninja explain: output third_party/kineto/libkineto/CMakeFiles/libkineto_defs.bzl of phony edge with no inputs doesn't exist
ninja explain: third_party/kineto/libkineto/CMakeFiles/libkineto_defs.bzl is dirty
ninja explain: /Users/malfet/git/pytorch/pytorch/torch/csrc/autograd/generated/Functions.cpp is dirty
```

This is a regression introduced by https://github.com/pytorch/pytorch/pull/139025.

After this change, incremental rebuilds with no changes cause no build actions:
```
% ninja -j1 -v -d explain -n torch_cpu
ninja explain: output third_party/kineto/libkineto/CMakeFiles/libkineto_defs.bzl of phony edge with no inputs doesn't exist
ninja explain: third_party/kineto/libkineto/CMakeFiles/libkineto_defs.bzl is dirty
ninja: no work to do.
```

Test plan: Wait for at least on XPU build to finish...

Fixes https://github.com/pytorch/pytorch/issues/140432

Pull Request resolved: https://github.com/pytorch/pytorch/pull/140438
Approved by: https://github.com/kit1980, https://github.com/huydhn
This commit is contained in:
Nikita Shulga
2024-11-12 20:19:28 +00:00
committed by PyTorch MergeBot
parent 14bb49fe98
commit 1172a10574
1 changed files with 4 additions and 1 deletions
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5
caffe2/CMakeLists.txt
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@ -336,9 +336,12 @@ set(TORCH_GENERATED_CODE
${GENERATED_H_PYTHON}
${GENERATED_TESTING_PYTHON}
${GENERATED_CXX_TORCH_CUDA}
${GENERATED_CXX_TORCH_XPU}
)
if(USE_XPU)
list(APPEND TORCH_GENERATED_CODE ${GENERATED_CXX_TORCH_XPU})
endif()
set(GEN_PER_OPERATOR_FLAG)
if(USE_PER_OPERATOR_HEADERS)
list(APPEND GEN_PER_OPERATOR_FLAG "--per_operator_headers")