Update codegen to handle the new case of datamov chain

[n0thingNoob]

#303
handle the case:
%134 = "neura.not"(%133) {dfg_id = 159 : i32, mapping_locs = [{id = 5 : i32, index_per_ii = 11 : i32, invalid_iterations = 0 : i32, resource = "tile", time_step = 11 : i32, x = 1 : i32, y = 1 : i32}]} : (!neura.data<i1, i1>) -> !neura.data<i1, i1>
%151 = "neura.data_mov"(%134) {dfg_id = 175 : i32, mapping_locs = [{id = 16 : i32, index_per_ii = 11 : i32, invalid_iterations = 0 : i32, resource = "link", time_step = 11 : i32}, {id = 288 : i32, index_per_ii = 12 : i32, invalid_iterations = 0 : i32, per_tile_register_id = 0 : i32, resource = "register", time_step = 12 : i32}, {id = 28 : i32, index_per_ii = 13 : i32, invalid_iterations = 0 : i32, resource = "link", time_step = 13 : i32}, {id = 329 : i32, index_per_ii = 14 : i32, invalid_iterations = 0 : i32, per_tile_register_id = 9 : i32, resource = "register", time_step = 14 : i32}, {id = 329 : i32, index_per_ii = 15 : i32, invalid_iterations = 0 : i32, per_tile_register_id = 9 : i32, resource = "register", time_step = 15 : i32}, {id = 329 : i32, index_per_ii = 16 : i32, invalid_iterations = 0 : i32, per_tile_register_id = 9 : i32, resource = "register", time_step = 16 : i32}, {id = 329 : i32, index_per_ii = 0 : i32, invalid_iterations = 1 : i32, per_tile_register_id = 9 : i32, resource = "register", time_step = 17 : i32}, {id = 329 : i32, index_per_ii = 1 : i32, invalid_iterations = 1 : i32, per_tile_register_id = 9 : i32, resource = "register", time_step = 18 : i32}, {id = 329 : i32, index_per_ii = 2 : i32, invalid_iterations = 1 : i32, per_tile_register_id = 9 : i32, resource = "register", time_step = 19 : i32}]} : (!neura.data<i1, i1>) -> !neura.data<i1, i1>

[Copilot]

Pull request overview

Updates Neura codegen to correctly model/emit DATA_MOV/CTRL_MOV when a routing path contains register steps between link hops (the “datamov chain” case from issue #303).

Changes:

• Added helper to collect register steps between adjacent link time steps.
• Enhanced intermediate hop emission to handle link→reg→link segments via deposit / register transfer(s) / egress.
• Updated synthetic DFG node construction to mirror the materialized instruction stream for these segments.

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[Jackcuii]

Good Job! GEMM works now, except a small issue about the GEP (I will file another issue, I hacked it and GEMM outputs the right result)