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Drop REMOVE_ABC_BUFFERS from sky130hd/ibex and sky130hs/ibex (CI to judge) - #4578

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maliberty merged 1 commit into
The-OpenROAD-Project:masterfrom
oharboe:remove-abc-buffers-ibex
Sep 30, 2026
Merged

maliberty merged 1 commit into
The-OpenROAD-Project:masterfrom
oharboe:remove-abc-buffers-ibex

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@oharboe

@oharboe oharboe commented Sep 29, 2026

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Follow-up to #4575, which has the background on REMOVE_ABC_BUFFERS: it dates from the full floorplan repair_timing in 2024, and other designs no longer need it to get through routing.

  • Not run locally: both designs use SYNTH_HDL_FRONTEND=slang, and the yosys I tested with (BCR yosys via bazelisk run //:install, bazel: //:install also installs yosys for ORFS OpenROAD#11563) has no slang frontend yet. This PR lets CI produce the numbers.
  • History:
    • sky130hs/ibex got the flag in acfb374 ("remove ABC buffers for 3 designs as DR doesn't complete").
    • sky130hd/ibex got it with 8adcb9c ("sky130hd/ibex: add bazel"), with no reason given.

Ask for maintainers: please look at CI's result for these two designs.

  • If routing completes and QoR is acceptable, update the dashboard rules/baseline as needed and merge.
  • If not, say so and I'll close this or narrow it to one design.

🤖 Generated with Claude Code

Not checked locally: both use the slang frontend. CI will show whether
they still need the flag. See The-OpenROAD-Project#4575 for the history.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

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Code Review

This pull request removes the REMOVE_ABC_BUFFERS configuration setting from the ibex design configurations for both sky130hd and sky130hs platforms. I have no feedback to provide as there are no review comments.

@oharboe
oharboe requested a review from maliberty September 29, 2026 05:31
oharboe added a commit to oharboe/OpenROAD-flow-scripts that referenced this pull request Sep 29, 2026
floorplan.tcl now always runs repair_timing_helper. The variable is
dropped from variables.yaml, variables.json and FlowVariables.md.

Designs are deliberately not touched here; they are handled by
The-OpenROAD-Project#4575, The-OpenROAD-Project#4576, The-OpenROAD-Project#4577, The-OpenROAD-Project#4578 and The-OpenROAD-Project#4579.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
@oharboe

oharboe commented Sep 29, 2026

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@vvbandeira pr-head CI outage.

@openroad-ci

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🔍 QoR check

Metrics reflect the PR merge build — i.e. what will land on the target branch.

Commit 66fd921 · Jenkins build #3 · Baseline: build · View build on dashboard

62 design(s) checked — 0 with regression(s), 0 without a comparable baseline.

@maliberty
maliberty merged commit 3ed4918 into The-OpenROAD-Project:master Sep 30, 2026
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3 participants