tree 0967d1f7a3d4311885e4a767b0def004ed49327e
parent ed30f30d7f8d082acf9468f7abfdf43929af16aa
author Vivian Zhang <zhyuhang88@gmail.com> 1757102973 -0700
committer GitHub <noreply@github.com> 1757102973 -0700
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[Codegen][IGEMM] Do not pre-pad convs with CHW layout or small input channel size (#21839)

For CHW layout, there is no need to vectorize the channel dimension for
im2col ops. Pre-pad input channel dimension may cause over padding when
filter H/W size is large, since the reduction dimensions will be
collapsed during im2col transform.

For HWC layout, when the input channel size is small (e.g., inputChannel
= 3, and paddingSize = 32), pre-padding may also cause perf regression
because of overpad, remove such cases from pre-padding path.

---------

Signed-off-by: yzhang93 <zhyuhang88@gmail.com>