👷 Update setup-mlir version

[denialhaag]

Description

This PR updates the setup-mlir version.

Checklist:

• The pull request only contains commits that are focused and relevant to this change.
• I have added appropriate tests that cover the new/changed functionality.
• I have updated the documentation to reflect these changes.
• I have added entries to the changelog for any noteworthy additions, changes, fixes, or removals.
• I have added migration instructions to the upgrade guide (if needed).
• The changes follow the project's style guidelines and introduce no new warnings.
• The changes are fully tested and pass the CI checks.
• I have reviewed my own code changes.

[coderabbitai]

📝 Walkthrough

Summary by CodeRabbit

• Chores
  • Updated build infrastructure dependencies to maintain compatibility with current tooling versions.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

Walkthrough

Updated the MLIR setup step in the reusable CI workflow to use a newer external action version (setup-mlir) with an updated LLVM version parameter (21.1.7), replacing the previous action reference and its tag-based input. No control flow changes.

Changes

Cohort / File(s)	Change Summary
CI Workflow Configuration \.github/workflows/reusable-mlir-tests.yml``	Updated "Set up MLIR" step to use newer setup-mlir action version (6b8d4ef) with llvm-version: 21.1.7 input instead of previous version with tag: 2025.11.25 parameter

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

• Single workflow file with straightforward action reference and parameter update
• No logic or control flow changes involved

Possibly related PRs

• 👷 Update MLIR set-up to use self-built versions #1294: Updates the same CI workflow's MLIR setup step to use the external setup-mlir action, establishing a related pattern of action consolidation across repositories.

Suggested reviewers

• burgholzer

Poem

🐰 A version bump hops into view,
Twenty-one point seven, fresh and new!
MLIR action steps into place,
Workflows run at a faster pace! ✨

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the main change: updating the setup-mlir version, which matches the PR's core objective.
Description check	✅ Passed	The description includes a summary of changes and a completed checklist, though some checklist items are appropriately marked as not applicable for this infrastructure update.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch test-setup-mlir

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[denialhaag]

I guess we might as well use this PR to get ahead of the inevitable Renovate PR.

[burgholzer]

Yeah. Sounds good 👍🏼

[coderabbitai]

Actionable comments posted: 1

📜 Review details

Configuration used: CodeRabbit UI

Review profile: ASSERTIVE

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 02fda43 and 6a6e591.

📒 Files selected for processing (1)

• .github/workflows/reusable-mlir-tests.yml (1 hunks)

🔇 Additional comments (1)

.github/workflows/reusable-mlir-tests.yml (1)

40-43: Action version update verified and parameters are correct. The commit hash 6b8d4ef561ca19268764609adf9fa12f53015e1f is confirmed in the setup-mlir repository, tagged as 2025.12.05, the llvm-version parameter is supported in the action's API, and LLVM 21.1.7 is a valid release (released Dec 2, 2025, used by the 2025.12.05 release build).