llvm / llvm/circt

[Calyx] Add more integration tests for Calyx `hlstool` flow

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Calyx
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Description

#5847 added the Calyx-based compilation flow to `hlstool`. We should start adding more integration tests for Calyx so that we have long-term confidence in what the various (scf/affine/loopschedule)->calyx flows can and cannot do. A reasonable place to start could be the [`handshake` integration tests](https://github.com/llvm/circt/tree/main/integration_test/Dialect/Handshake). To start us off, we probably want tests for:

- [ ] `memref` argument lowering
- [ ] Nested loops in `scf`
- [ ] Function calls and multi-component designs

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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 with the Calyx flow added in #5847 and the integration tests under integration_test/Dialect/Handshake. Run the existing hlstool integration tests first, then examine how they cover scf, affine, and loopschedule flows. Done means adding coverage for memref argument lowering, nested scf loops, and function calls with multi-component designs.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
compilers, testing-qa
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
42/100

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