hotfix: flatten while generating JSON headers

[kareefardi]

Steps

• Odb.SetPowerConnections

  • Fixed bug where instances with special characters in their name and power pins are not equal to those of the SCL would not get connected.
  • Added assertion that exactly one pin is connected for every operation.

• Yosys.GenerateJSONHeader

  • Netlist is now flattened so Odb.SetPowerConnections can properly set pins for nested macros with power pin names not equal to those of the SCL.

Testing

• test/designs/dual_spm
  • SPM macro now hardened with pin names power, ground (as to not match the standard cell pin names)
  • Dual SPM now nests the macros in a thin wrapper to test that the SPM macro will get its power pins connected properly.

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Depends on https://github.com/efabless/openlane2-ci-designs/pull/27

[openlane-bot]

Metric comparisons are in beta. Please report bugs under the issues tab.

To create this report yourself, grab the metrics artifact from the CI run, extract them, and invoke python3 -m openlane.common.metrics compare-main <path to directory>.

• No changes to critical metrics were detected in analyzed designs.

Full tables ► https://gist.github.com/openlane-bot/19ea81129ea364042f3ab65f3199afac