[slimtensor] Add factory functions for creating empty CPU tensors #16398
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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 Differential Revision: [D89820292](https://our.internmc.facebook.com/intern/diff/D89820292/) [ghstack-poisoned]
🔗 Helpful Links🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/16398
Note: Links to docs will display an error until the docs builds have been completed. ❗ 1 Active SEVsThere are 1 currently active SEVs. If your PR is affected, please view them below: ❌ 3 New Failures, 1 Unrelated FailureAs of commit 83ad183 with merge base fd6fa87 ( NEW FAILURES - The following jobs have failed:
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…tensors" 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 Differential Revision: [D89820292](https://our.internmc.facebook.com/intern/diff/D89820292/) [ghstack-poisoned]
This was referenced Jan 5, 2026
This was referenced Jan 5, 2026
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This diff adds factory functions to create SlimTensor instances with allocated storage for better usage.
Key components:
factory/Empty.h- Factory functions for creating empty tensors:empty_strided(sizes, strides, dtype, device)- Creates tensor with explicit sizes/stridesempty(sizes, dtype, device)- Creates contiguous tensor (auto-computes row-major strides)empty(initializer_list, dtype, device)- Convenience overload for inline size specificationempty_like(tensor)- Creates empty tensor with same metadata as another tensorcore/Storage.h- Addednew_storage()helper function:Differential Revision: D89820292