Currently a `PrefetchNode` is replaced with a loop nest doing single cache line prefetches, and that's done in the storage flattener. This is bad for Hexagon, because Hexagon has a prefetch engine which can prefetch a 2D buffer in the background, but it requires a different setup. Once the loop nest is generated, it's too late for us.
What I'm trying to do is to replace `PrefetchNode` with a new TVM builtin, which then can be legalized/lowered individually for each target, with a default lowering doing what storage flattener does now. The problem is that the current legalization/lowering mechanisms won't work for this, because legalization of the new prefetch builtin will require generating loops, which are statements, whereas the builtin lowering can only produce `PrimExpr`s. Would we consider extending legalization to handle statements? --- [Visit Topic](https://discuss.tvm.apache.org/t/handling-of-prefetch-legalization-lowering/10718/1) to respond. You are receiving this because you enabled mailing list mode. To unsubscribe from these emails, [click here](https://discuss.tvm.apache.org/email/unsubscribe/745fe9c282b922b98a187944f17dfcea25a007d9697c53a78c5e3014914514db).
