Fix LayerNorm Problem Release2.1 #33534
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PR types
Bug fixes
PR changes
OPs
Describe
优化LayerNorm计算过程。
同时修复如下问题：
DLTP-25782 [Bug]
DLTP-26400 [Bug]
修复LayerNorm在大数输入时输出Nan的bug。
DLTP-28680 [Bug]
修复LayerNorm在归一化维度长度<kMaxBlockDim时的BlockDim计算错误bug。
修复LayerNorm在大输入shape时输出结果0的bug。
cherry-pick from Fix LayerNorm Problem #33420