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PR Category
Custom Device
PR Types
Bug fixes
Description
接到用户反馈说
adam
算子在某些情况下计算结果不正确,排查的时候受到了这个PR #70847 的启发,发现beta1_pow
和beta2_pow
放在CPU上的时候会出错,而在XPU上的时候就没事。排查发现是有一个临时变量的使用不当,原版生成了临时的
DenseTensor
之后给它赋值然后取了指针,随后这个临时变量被销毁,进而设备上的指针失效,但是在原版的后续代码中仍然使用了它。本PR修复了此问题,调整了两个临时变量的位置,改变了它们的生命周期。
这个优化器的代码实现较久,不确定是否还有别的问题,本PR先把这处明显有问题的给修掉。