Fix backward bug #34582
Merged
Fix backward bug #34582
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This was referenced Nov 22, 2021
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PR types
Bug fixes
PR changes
APIs
Describe
修复当传入的初始梯度是反向图中的非叶子节点时候，backward API 失败的bug。
问题描述：
若在反向图中指定了非叶子节点（图中Pow(x,2)@Grad ）的初始梯度值，则该Node不能直接进行反向计算，需要待其上游节点（图中 Pow(y,3)@Grad)执行完成后再进行计算。同时，该上游节点产生的梯度值需要和指定的初始值进行累加后，作为该节点(图中Pow(x,2)@Grad )的输入。
修复方式：