llvm / llvm/circt

[HandshakeToDC] Tech debt: clk/rst inserted later than they probably should be

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HandshakeToDC
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C++
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Description

In #7825 I track the `hw.module`s which have been created then after everything is done add the clk and rst ports. This is not the desirable way to achieve this but all of the better ways I tried resulted in block args getting confused. Fix this.

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reading issue #7825 and the HandshakeToDC implementation, focusing on where hw.module instances are created and where clk and rst ports are added. The work is done when those ports can be introduced without confusing block arguments and the resulting modules remain correct.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
compilers
Issue type
Refactor
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
30/100

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