[Relay] InferCorrectLayout for strided_slice & min_num_branches option in CombineParallelConv2D #2961
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In
AlterOpLayout
, rewrite attributes of strided_slice if packed layout (e.g. NCHW4c) is used. Thebegin
andend
are divided by the factor of sub-axis.This allows the expression after
CombineParallelConv2D
transformation to use packed layout.An option
min_num_branches
is added toCombineParallelConv2D
to control when to apply the pass according to performance issue in #2827cc @masahi @kevinthesun @yzhliu