grt: fixes and optimizations on incremental CUGR#10797

Draft

eder-matheus wants to merge 11 commits into

The-OpenROAD-Project:masterfrom

eder-matheus:grt_cugr_incr_fix

Commits on Jul 8, 2026

grt/cugr: erase net from GlobalRouter when CUGR net is deleted
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grt/cugr: update GlobalRouter's netlist with CUGR net updates
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grt/cugr: limit incremental routing to dirty nets and skip global parasitics rebuild
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grt/cugr: sync only dirty-net pin access points during incremental routing
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grt/cugr: scope incremental slack and res-aware updates to dirty nets
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grt/cugr: shorten incremental routing comments to single lines
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grt/cugr: patch only rerouted nets into routes_ during incremental routing
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grt/cugr: skip global congestion scan in pattern/maze during incremental
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grt/cugr: warn once when incremental routing leaves congestion
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grt/cugr: run all refinement stages on dirty nets and skip unchanged ones
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grt/cugr: share the stage sequence between full and incremental route
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