Rewrite StaticallyIndexedArray to use C-array instead of Tuple #3587
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This was referenced Jan 16, 2026
cgmillette
reviewed
Jan 16, 2026
| // This avoids deep template instantiation while maintaining the same interface | ||
| template <typename T, index_t N> | ||
| struct StaticallyIndexedArrayImpl | ||
| struct StaticallyIndexedArray |
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What we are doing here is essentially a vector of a vector, no? Maybe we can refactor this into the vector_type class
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I think the current major problem with this class it has to be interface-compatible with a Tuple. Need to be careful with the call sites
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I think we can retire the StaticallyIndexedArray and replace with StaticallyIndexedArray_v2
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Replace the recursive template metaprogramming implementation of StaticallyIndexedArray with a simple C-array based struct. This avoids deep template instantiation while maintaining the same interface. Key changes: - StaticallyIndexedArray now stores `T data_[N]` instead of inheriting from Tuple - Added constexpr conversion constructor to convert from any indexed container (Tuple, etc.) - Added arithmetic operators (+, -, *, +=, -=) using C++20 concepts - Added overloads for container_reorder_given_new2old/old2new - Added overloads for get_container_subset and set_container_subset - Specialization for empty array (N=0) Co-Authored-By: Claude <[email protected]>
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Standalone PR
This PR is independent and can be merged separately from the main optimization stack.
Related stack: #3585 → #3588 → #3589 → #3590 → #3596
Summary
Build Time Improvement
Stacked on: #3585
Test plan
example_grouped_conv_fwd_xdl_fp16 1 1 1