【slice】Stridecopy support diff input-dim and ouput_dim #74038
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xiaoguoguo626807 changed the title 
xiaoguoguo626807 merged commit 29b4bf4 into PaddlePaddle:develop 85 of 94 checks passed
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PR Category
Execute Infrastructure
PR Types
Improvements
Description
pcard-67164
stride_copy 支持 input 的dim 只要和output dim 的后面维度一致时即可copy ，
这样可以减少前处理的broadcast, 在x.shape= [108,64,12288] , index=slice(0,100,2), value.shape = [64, 12288] case 下，性能提升一倍
todo： 当前stride_copy内部分成了三个路径，input.numel = 0; input.numel = output.numel; input canexpand to output.numel. 每个路径中又根据Rank, vecsize 分为4*9个分支. 代码非常多，可以进行优化