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* xprop: Test fixes and abort on test failureJannis Harder2023-02-131-1/+1
| | | | | | | | | Use `$finish(0)` to silently exit even when using recent iverlog versions. Run `write_verilog -noexpr` before `write_verilog` as the latter can modify the design. This also enables checking the tests results, as xprop should be in a state where the existing tests pass.
* xprop: Smaller subset of tests to run by defaultJannis Harder2023-02-131-44/+53
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* New xprop pass to encode 3-valued x-propagation using 2-valued logicJannis Harder2022-11-301-0/+278