[0-size Tensor Job2 No.66] Add 0-size Tensor support for paddle.nn.functional.softmax_with_cross_entropy[fluid_ops]

[co63oc]

PR Category

Operator Mechanism

PR Types

Bug fixes

Description

66 paddle.nn.functional.softmax_with_cross_entropy

soft_label 为False时，axis 所在列不能为0，其他列相同，所以 softmax, loss的numel 都为0，这里判断softmax 的numel为0
https://www.paddlepaddle.org.cn/documentation/docs/zh/develop/api/paddle/nn/functional/softmax_with_cross_entropy_cn.html#softmax-with-cross-entropy

PaddleAPITest 测试通过，错误为numpy error

55 paddle.nn.functional.cross_entropy - part
soft_label 为True时，loss维度中axis所在列设置为1，返回填充0
其中，在python端，如果reduction为mean，返回填充需要修改为nan，因为需要调试性能问题，这部分没有修改，在其他PR再修改
PaddleAPITest 测试通过，错误为numpy error

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[co63oc]

/re-run all-failed

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 30.00000% with 7 lines in your changes missing coverage. Please review.

Please upload report for BASE (develop@e1842d4). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
paddle/phi/kernels/cpu/cross_entropy_kernel.cc	14.28%	6 Missing ⚠️
...addle/phi/kernels/cpu/cross_entropy_grad_kernel.cc	66.66%	1 Missing ⚠️

❌ Your patch status has failed because the patch coverage (30.00%) is below the target coverage (90.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             develop   #73880   +/-   ##
==========================================
  Coverage           ?   30.00%           
==========================================
  Files              ?        2           
  Lines              ?       10           
  Branches           ?        0           
==========================================
  Hits               ?        3           
  Misses             ?        7           
  Partials           ?        0           

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[co63oc]

/re-run all-failed

[co63oc]

/re-run all-failed

[co63oc]

/re-run all-failed

[co63oc]

/re-run all-failed

[co63oc]

/re-run all-failed

[co63oc]

@DanielSun11 CI已完成需要review

[DanielSun11]

LGTM