[AIEX] Extend Staged 2D/3D regalloc to avoid spills#685

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andcarminati wants to merge 9 commits intoaie-publicfrom

andreu.extend.2d3d.allocation

Commits on Nov 13, 2025

[AIE2P] Extend allocation filter to include only Target MIs

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[AIEX] Fix LIs in SuperRegRewriter that are related to unallocated registers

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[AIEX][NFC] Refator some AIESuperReg utilities

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[AIE2P] Add a base test to detect missing undef flags in copy expansion.

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[AIEX] Add missing undef flags in copy expansion

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[AIE2P] Add a base lit test with unallocated 2D/3D regs before main Greedy run

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[AIEX] Add a Pass to expand unallocated 2D/3D into individual ones

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[AIE2P] Add base tests exposing cycles in copy bundles

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[AIEX] Expand copy bundles for unallocated dest VRegs

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