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[CINN] Fix bug of substituting dim expr for group by zyfncg · Pull Request #62941 · PaddlePaddle/Paddle · GitHub
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[CINN] Fix bug of substituting dim expr for group #62941
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你的PR提交成功，感谢你对开源项目的贡献! |
jiahy0825
approved these changes
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LGTM
tc20042008
approved these changes
Mar 22, 2024
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PR types
Bug fixes
PR changes
Others
Description
Pcard-67164
问题描述：
目前Group的输入Value维度符号为复合符号（如 S0+S1）时，会自动替换为新的简单符号表示（如S10）。但当输入Value的维度符号既有S0,S1 同时也有Broadcast(S0, S1)，此时如果将Broadcast(S0, S1)替换为新符号的话会丢失掉与S0,S1的广播约束信息，对于此类情况Broadcast(S0, S1)是不需要替换为新符号的。
修复方案：
本PR中增加了对输入Value维度替换复合符号的过滤处理，当一个复合符号的所有基础符号都能在其他输入Value的维度符号中找到时，将不会对这样的复合符号进行替换。