[cherry-pick] add a inner loop for index_select_grad_init() in index_select op when dealing with large-shape data #41669
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… dealing with large-shape data (PaddlePaddle#41563)
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YuanRisheng
approved these changes
Apr 12, 2022
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cherry-pick #41563
For index_select op, the function index_select_grad_init will 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.