Simplifier rules for nested broadcasts#5794
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abadams
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Mar 8, 2021
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This PR adds some simplifier rules for nested broadcasts that result from vectorizing multiple dimensions. We had rules for nested broadcasts, and rules for broadcasts of the same size reassociated with one other expression, but not rules for nested broadcasts of different size also reassociated.
These rules are helpful for schedules that avoid performance regressions in #5784, by simplifying multidimensional vectorization when leaving buffers interleaved (and fuse doesn't work).