add a inner loop for index_select_grad_init() in index_select op when dealing with large-shape data #41563
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YuanRisheng
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… dealing with large-shape data (PaddlePaddle#41563)
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PR types
Bug fixes
PR changes
OPs
Describe
For index_select op, the function
index_select_grad_initwill not work on part of data whose number exceeds the loop number, so we add a inner loop by replacing for() with CUDA_KERNEL_LOOP.