[slimtensor] Add factory functions for creating empty CPU tensors #16730
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Pull Request resolved: #16398 This diff adds factory functions to create SlimTensor instances with allocated storage for better usage. **Key components:** 1. **`factory/Empty.h`** - Factory functions for creating empty tensors: - `empty_strided(sizes, strides, dtype, device)` - Creates tensor with explicit sizes/strides - `empty(sizes, dtype, device)` - Creates contiguous tensor (auto-computes row-major strides) - `empty(initializer_list, dtype, device)` - Convenience overload for inline size specification - `empty_like(tensor)` - Creates empty tensor with same metadata as another tensor 2. **`core/Storage.h`** - Added `new_storage()` helper function: - Computes required storage bytes from sizes, strides, and dtype - Allocates and returns a new owning Storage instance ghstack-source-id: 334622015 @exported-using-ghexport Differential Revision: [D89820292](https://our.internmc.facebook.com/intern/diff/D89820292/)
🔗 Helpful Links🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/16730
Note: Links to docs will display an error until the docs builds have been completed. ⏳ No Failures, 140 PendingAs of commit ef540f1 with merge base 4f8dbde ( This comment was automatically generated by Dr. CI and updates every 15 minutes. |
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This PR was created by the merge bot to help merge the original PR into the main branch.
ghstack PR number: #16398 by @Gasoonjia
^ Please use this as the source of truth for the PR details, comments, and reviews
ghstack PR base: https://github.com/pytorch/executorch/tree/gh/gasoonjia/77/base
ghstack PR head: https://github.com/pytorch/executorch/tree/gh/gasoonjia/77/head
Merge bot PR base: https://github.com/pytorch/executorch/tree/main
Merge bot PR head: https://github.com/pytorch/executorch/tree/gh/gasoonjia/77/orig
Differential Revision: D89820292
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