[Operator Mechanism] Remove unbind int32 element limit - #79737
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zhengshengning merged 2 commits intoSep 10, 2026
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… normal un-strided path
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wanghuancoder
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Sep 9, 2026
zhengshengning
merged commit Sep 10, 2026
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omoYang
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Sep 15, 2026
Backport the SplitFunctor<CPUContext> int->int64_t narrowing fix from PaddlePaddle#79246 so unbind/split on CPU no longer overflows when a per-output column count exceeds INT_MAX (e.g. unbind([2, 2^31], axis=0) via the non-strided path). Pairs with PaddlePaddle#79737 which removed the numel<=INT_MAX guard.
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PR Category
Operator Mechanism
PR Types
Bug fixes
Description
修复
unbind对输入 Tensor 总元素数超过2^31 - 1时被错误拦截的问题。当前
unbind的常规GPU路径和stride 路径均存在针对x.numel()的INT_MAX限制，导致大规模MoE Tensor在执行unbind时直接报错。相关实现后续已经支持根据数据规模选择int64_t索引路径，因此移除两处不再必要的元素数量检查：paddle/phi/kernels/impl/unbind_kernel_impl.hpaddle/phi/kernels/stride/unbind_kernel.cc是否引起精度变化
否