[Relay] Add DefuseOps pass #6946
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cc @zhiics @mbrookhart it would be great if you can also take a look at it |
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Co-authored-by: minminsun <minmin.smm@alibaba-inc.com>
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@FrozenGene comments are addressed |
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Add a DefuseOps pass. DefuseOps is an inverse operation of FuseOps pass. It transforms a fused program returned by
relay::transform::FuseOpsinto the program before FuseOps (i.e.,x == DefuseOps(FuseOps(x))).This pass is necessary for a layout rewrite pass in Ansor auto-scheduler. Because FoldConstant cannot work across the boundary of the fused Primitive function. When we want to use FoldConstant after fusion, we have to defuse it, apply FoldConstant and fuse it again.
co-authored by @minminsun