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Add Optimization Barriers#4763

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georgerennie wants to merge 13 commits intoYosysHQ:mainYosysHQ/yosys:mainfrom georgerennie:george/optimization_barriersgeorgerennie/yosys:george/optimization_barriersCopy head branch name to clipboard

+584-32

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Commits on Nov 20, 2024

• kernel: define $barrier cell

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• opt_merge: don't merge $barrier cells

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• write_aiger2: support $barrier

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• write_btor: support $barrier, $buf and $_BUF_

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• write_firrtl: support $buf and $barrier

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• write_smt2: support $buf and $barrier

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• write_verilog: support $buf and $barrier

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• flatten: add -barriers flag

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• optbarriers: add command to add/remove optimization barriers

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• prep: add -barriers flag

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Commits on Dec 2, 2024

• optbarriers: add -noconns option

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  f372def

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• optbarriers: preserve SCCs in processes

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• optbarriers: comment typo

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