✨ Add `-absorb-swaps` pass by jmoosburger · Pull Request #1661 · munich-quantum-toolkit/core

jmoosburger · 2026-04-23T06:31:12Z

Description

add new qco pass as warmup task (in cooperation with @MatthiasReumann)
remove leading swap-gates in a circuit
reorder static qubits instead

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.
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I have reviewed my own code changes.

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jmoosburger · 2026-04-23T06:42:39Z

@MatthiasReumann

The fork works just fine ;-)

i think we broke some unit tests (92 to be accurate), i check this out currently

is there any chance for you to write one unittest as example that addresses a piece of swapAbsorb-functionality. that would help me a lot understanding the projects test-mechanisms.

MatthiasReumann · 2026-04-23T08:30:36Z

@MatthiasReumann

The fork works just fine ;-)

i think we broke some unit tests (92 to be accurate), i check this out currently

is there any chance for you to write one unittest as example that addresses a piece of swapAbsorb-functionality. that would help me a lot understanding the projects test-mechanisms.

Hello @jmoosburger 👋🏻

Simply revert the CompilationPipeline.cpp file. Removing the added pm.addPass should fix the tests. Could you verify that?

jmoosburger · 2026-04-23T19:52:05Z

@MatthiasReumann

copy that, i do verify!
where else do we register the pass then, as it would never be executed without the pm.addPass(), right?

MatthiasReumann · 2026-04-24T05:11:13Z

@MatthiasReumann

copy that, i do verify! where else do we register the pass then, as it would never be executed without the pm.addPass(), right?

Great! 🚀

For now, I think unit testing the pass functionality would suffice. For that take a look at the test_mapping.cpp and the respective CMakeLists.txts to implement unit tests in a test_swap_absorption.cpp file.

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…m-toolkit#1380) ## Description Add CRZ, MCX, MCZ, MCRZ functionality to ZX package. Add convenience addCCZ function as it avoids one additional Hardamard edge (optimizes it away). Fixes munich-quantum-toolkit#1357 ## Checklist: - [X] The pull request only contains commits that are focused and relevant to this change. - [X] I have added appropriate tests that cover the new/changed functionality. - [X] ~~I have updated the documentation to reflect these changes.~~ - [x] I have added entries to the changelog for any noteworthy additions, changes, fixes, or removals. - [x] ~~I have added migration instructions to the upgrade guide (if needed).~~ - [x] The changes follow the project's style guidelines and introduce no new warnings. - [x] The changes are fully tested and pass the CI checks. - [X] I have reviewed my own code changes. --------- Signed-off-by: Marcel Walter <marcelwalter.mw@gmail.com> Signed-off-by: Keefe Huang <30915130+keefehuang@users.noreply.github.com> Signed-off-by: Daniel Haag <121057143+denialhaag@users.noreply.github.com> Signed-off-by: Lukas Burgholzer <burgholzer@me.com> Co-authored-by: Keefe Huang <keefe.huang@tum.de> Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com> Co-authored-by: Marcel Walter <marcel.walter@tum.de> Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> Co-authored-by: Lukas Burgholzer <burgholzer@me.com> Co-authored-by: Keefe Huang <huangq@cit.tum.de> Co-authored-by: Daniel Haag <121057143+denialhaag@users.noreply.github.com>

…#1407) ## Description This PR extends the rotation merging pass in the QCO ~~MQTOpt~~ dialect to support quaternion-based gate fusion. The existing rotation merge pass only merges consecutive rotation gates of the **same type** (e.g., `rx + rx` or `ry + ry`) by adding their angles. This PR introduces quaternion-based merging, which can merge rotation gates of different types (currently only single qubit gates `rx`, `ry`, `rz`, `r`, `p`, `u2`, `u`). Quaternions are widely used to represent rotations in three-dimensional space and naturally map to qubit gate rotations around the Bloch sphere. The implementation: 1. Converts rotation gates to quaternion representation 2. Multiplies quaternions using the Hamilton product 3. Converts the resulting quaternion back to a `u` gate. (This could also be done differently in the future, and directly decompose to the correct base gates by using the decomposition from munich-quantum-toolkit#1182) This optimization is enabled by default but can be **disabled** by adding this flag to the compiler invocation: ```bash mqt-cc --disable-merge-single-qubit-rotation-gates <input.mlir> ``` Closes munich-quantum-toolkit#1029 ## Checklist:  - [x] The pull request only contains commits that are focused and relevant to this change. - [x] I have added appropriate tests that cover the new/changed functionality. - [x] I have updated the documentation to reflect these changes. - [x] I have added entries to the changelog for any noteworthy additions, changes, fixes, or removals. - [x] ~~I have added migration instructions to the upgrade guide (if needed).~~ - [x] The changes follow the project's style guidelines and introduce no new warnings. - [x] The changes are fully tested and pass the CI checks. - [x] I have reviewed my own code changes. --------- Signed-off-by: burgholzer <burgholzer@me.com> Signed-off-by: Daniel Haag <121057143+denialhaag@users.noreply.github.com> Co-authored-by: Matthias Reumann <matthias.reumann@tum.de> Co-authored-by: burgholzer <burgholzer@me.com> Co-authored-by: Daniel Haag <121057143+denialhaag@users.noreply.github.com>

## Description This PR updates QDMI to the latest stable version (v1.3.0). After this has been back ported to `v3.x`, a new minor release for MQT Core will be created. ## Checklist  - [x] The pull request only contains commits that are focused and relevant to this change. - [x] I have added appropriate tests that cover the new/changed functionality. - [x] I have updated the documentation to reflect these changes. - [x] I have added entries to the changelog for any noteworthy additions, changes, fixes, or removals. - [x] I have added migration instructions to the upgrade guide (if needed). - [x] The changes follow the project's style guidelines and introduce no new warnings. - [x] The changes are fully tested and pass the CI checks. - [x] I have reviewed my own code changes. **If PR contains AI-assisted content:** - [x] I have disclosed the use of AI tools in the PR description as per our [AI Usage Guidelines](https://github.com/munich-quantum-toolkit/core/blob/main/docs/ai_usage.md). - [x] AI-assisted commits include an `Assisted-by: [Model Name] via [Tool Name]` footer. - [x] I confirm that I have personally reviewed and understood all AI-generated content, and accept full responsibility for it. Signed-off-by: Lukas Burgholzer <burgholzer@me.com>

…h-quantum-toolkit#1656) ## Description This PR updates the changelog and upgrade guide after the release of `v3.5.0`. ## Checklist - [x] The pull request only contains commits that are focused and relevant to this change. - [x] ~~I have added appropriate tests that cover the new/changed functionality.~~ - [x] ~~I have updated the documentation to reflect these changes.~~ - [x] ~~I have added entries to the changelog for any noteworthy additions, changes, fixes, or removals.~~ - [x] ~~I have added migration instructions to the upgrade guide (if needed).~~ - [x] The changes follow the project's style guidelines and introduce no new warnings. - [x] The changes are fully tested and pass the CI checks. - [x] I have reviewed my own code changes.

## Description This PR reconfigures the `prek` priorities to ensure that no two hooks write at the same time. ## Checklist - [x] The pull request only contains commits that are focused and relevant to this change. - [x] ~~I have added appropriate tests that cover the new/changed functionality.~~ - [x] ~~I have updated the documentation to reflect these changes.~~ - [x] ~~I have added entries to the changelog for any noteworthy additions, changes, fixes, or removals.~~ - [x] ~~I have added migration instructions to the upgrade guide (if needed).~~ - [x] The changes follow the project's style guidelines and introduce no new warnings. - [x] The changes are fully tested and pass the CI checks. - [x] I have reviewed my own code changes.

## Description This pull request adds the `walkProgramGraph` driver functionality originally developed in #1600 in an effort to reduce the PR size there. Moreover, #1661 also depends on the driver. ## Checklist  - [X] The pull request only contains commits that are focused and relevant to this change. - [X] I have added appropriate tests that cover the new/changed functionality. - [X] I have updated the documentation to reflect these changes. - [x] I have added entries to the changelog for any noteworthy additions, changes, fixes, or removals. - [X] I have added migration instructions to the upgrade guide (if needed). - [X] The changes follow the project's style guidelines and introduce no new warnings. - [X] The changes are fully tested and pass the CI checks. - [X] I have reviewed my own code changes. **If PR contains AI-assisted content:** - [X] I have disclosed the use of AI tools in the PR description as per our [AI Usage Guidelines](https://github.com/munich-quantum-toolkit/core/blob/main/docs/ai_usage.md). - [X] AI-assisted commits include an `Assisted-by: [Model Name] via [Tool Name]` footer. - [X] I confirm that I have personally reviewed and understood all AI-generated content, and accept full responsibility for it. --------- Signed-off-by: burgholzer <burgholzer@me.com> Co-authored-by: Copilot <copilot@github.com> Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com> Co-authored-by: burgholzer <burgholzer@me.com>

MatthiasReumann · 2026-04-28T09:54:35Z

FYI: Now that #1664 is merged, you can safely remove the copied code in drivers.h, drivers.cpp, and test_drivers.cpp 🚀

jmoosburger · 2026-04-28T20:38:47Z

oh boy, this was an awful merge :O i need to fix a few small things and want to verify it another time. will push it with first unittests on thursday :)

MatthiasReumann · 2026-04-29T05:29:05Z

oh boy, this was an awful merge :O i need to fix a few small things and want to verify it another time. will push it with first unittests on thursday :)

Sounds great, thanks! 🚀 Although, something seems to have gone wrong with the merge. Make sure to update the main branch on your fork!

denialhaag · 2026-04-29T14:20:24Z

Now that #1673 is merged, there are likely a few more conflicts. I'd recommend rebasing over merging main into this to also clean up the commit history. 🙂

…#1407) This PR extends the rotation merging pass in the QCO ~~MQTOpt~~ dialect to support quaternion-based gate fusion. The existing rotation merge pass only merges consecutive rotation gates of the **same type** (e.g., `rx + rx` or `ry + ry`) by adding their angles. This PR introduces quaternion-based merging, which can merge rotation gates of different types (currently only single qubit gates `rx`, `ry`, `rz`, `r`, `p`, `u2`, `u`). Quaternions are widely used to represent rotations in three-dimensional space and naturally map to qubit gate rotations around the Bloch sphere. The implementation: 1. Converts rotation gates to quaternion representation 2. Multiplies quaternions using the Hamilton product 3. Converts the resulting quaternion back to a `u` gate. (This could also be done differently in the future, and directly decompose to the correct base gates by using the decomposition from munich-quantum-toolkit#1182) This optimization is enabled by default but can be **disabled** by adding this flag to the compiler invocation: ```bash mqt-cc --disable-merge-single-qubit-rotation-gates <input.mlir> ``` Closes munich-quantum-toolkit#1029  - [x] The pull request only contains commits that are focused and relevant to this change. - [x] I have added appropriate tests that cover the new/changed functionality. - [x] I have updated the documentation to reflect these changes. - [x] I have added entries to the changelog for any noteworthy additions, changes, fixes, or removals. - [x] ~~I have added migration instructions to the upgrade guide (if needed).~~ - [x] The changes follow the project's style guidelines and introduce no new warnings. - [x] The changes are fully tested and pass the CI checks. - [x] I have reviewed my own code changes. --------- Signed-off-by: burgholzer <burgholzer@me.com> Signed-off-by: Daniel Haag <121057143+denialhaag@users.noreply.github.com> Co-authored-by: Matthias Reumann <matthias.reumann@tum.de> Co-authored-by: burgholzer <burgholzer@me.com> Co-authored-by: Daniel Haag <121057143+denialhaag@users.noreply.github.com>

This PR contains the following updates: | Package | Type | Update | Change | Pending | |---|---|---|---|---| | [adhtruong/mirrors-typos](https://redirect.github.com/adhtruong/mirrors-typos) | repository | patch | `v1.45.0` → `v1.45.1` | | | [astral-sh/ruff-pre-commit](https://redirect.github.com/astral-sh/ruff-pre-commit) | repository | patch | `v0.15.10` → `v0.15.11` | `v0.15.12` | | [astral-sh/uv-pre-commit](https://redirect.github.com/astral-sh/uv-pre-commit) | repository | patch | `0.11.6` → `0.11.7` | | | [henryiii/validate-pyproject-schema-store](https://redirect.github.com/henryiii/validate-pyproject-schema-store) | repository | patch | `2026.04.11` → `2026.04.17` | `2026.04.24` (+2) | | [rbubley/mirrors-prettier](https://redirect.github.com/rbubley/mirrors-prettier) | repository | patch | `v3.8.2` → `v3.8.3` | | Note: The `pre-commit` manager in Renovate is not supported by the `pre-commit` maintainers or community. Please do not report any problems there, instead [create a Discussion in the Renovate repository](https://redirect.github.com/renovatebot/renovate/discussions/new) if you have any questions. --- ### Release Notes <details> <summary>adhtruong/mirrors-typos (adhtruong/mirrors-typos)</summary> ### [`v1.45.1`](https://redirect.github.com/adhtruong/mirrors-typos/compare/v1.45.0...v1.45.1) [Compare Source](https://redirect.github.com/adhtruong/mirrors-typos/compare/v1.45.0...v1.45.1) </details> <details> <summary>astral-sh/ruff-pre-commit (astral-sh/ruff-pre-commit)</summary> ### [`v0.15.11`](https://redirect.github.com/astral-sh/ruff-pre-commit/releases/tag/v0.15.11) [Compare Source](https://redirect.github.com/astral-sh/ruff-pre-commit/compare/v0.15.10...v0.15.11) See: <https://github.com/astral-sh/ruff/releases/tag/0.15.11> </details> <details> <summary>astral-sh/uv-pre-commit (astral-sh/uv-pre-commit)</summary> ### [`v0.11.7`](https://redirect.github.com/astral-sh/uv-pre-commit/releases/tag/0.11.7) [Compare Source](https://redirect.github.com/astral-sh/uv-pre-commit/compare/0.11.6...0.11.7) See: <https://github.com/astral-sh/uv/releases/tag/0.11.7> </details> <details> <summary>henryiii/validate-pyproject-schema-store (henryiii/validate-pyproject-schema-store)</summary> ### [`v2026.04.17`](https://redirect.github.com/henryiii/validate-pyproject-schema-store/compare/2026.04.16...2026.04.17) [Compare Source](https://redirect.github.com/henryiii/validate-pyproject-schema-store/compare/2026.04.16...2026.04.17) ### [`v2026.04.16`](https://redirect.github.com/henryiii/validate-pyproject-schema-store/compare/2026.04.11...2026.04.16) [Compare Source](https://redirect.github.com/henryiii/validate-pyproject-schema-store/compare/2026.04.11...2026.04.16) </details> <details> <summary>rbubley/mirrors-prettier (rbubley/mirrors-prettier)</summary> ### [`v3.8.3`](https://redirect.github.com/rbubley/mirrors-prettier/compare/v3.8.2...v3.8.3) [Compare Source](https://redirect.github.com/rbubley/mirrors-prettier/compare/v3.8.2...v3.8.3) </details> --- ### Configuration 📅 **Schedule**: (UTC) - Branch creation - "every weekend" - Automerge - At any time (no schedule defined) 🚦 **Automerge**: Enabled. ♻ **Rebasing**: Whenever PR is behind base branch, or you tick the rebase/retry checkbox. 👻 **Immortal**: This PR will be recreated if closed unmerged. Get [config help](https://redirect.github.com/renovatebot/renovate/discussions) if that's undesired. --- - [ ] If you want to rebase/retry this PR, check this box --- This PR was generated by [Mend Renovate](https://mend.io/renovate/). View the [repository job log](https://developer.mend.io/github/munich-quantum-toolkit/core).  Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com> Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

This PR contains the following updates: | Update | Change | |---|---| | lockFileMaintenance | All locks refreshed | 🔧 This Pull Request updates lock files to use the latest dependency versions. --- ### Configuration 📅 **Schedule**: (UTC) - Branch creation - "before 4am on monday" - Automerge - At any time (no schedule defined) 🚦 **Automerge**: Enabled. ♻ **Rebasing**: Whenever PR is behind base branch, or you tick the rebase/retry checkbox. 👻 **Immortal**: This PR will be recreated if closed unmerged. Get [config help](https://redirect.github.com/renovatebot/renovate/discussions) if that's undesired. --- - [ ] If you want to rebase/retry this PR, check this box --- This PR was generated by [Mend Renovate](https://mend.io/renovate/). View the [repository job log](https://developer.mend.io/github/munich-quantum-toolkit/core).  Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com> Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

This pull request adds the `walkProgramGraph` driver functionality originally developed in munich-quantum-toolkit#1600 in an effort to reduce the PR size there. Moreover, munich-quantum-toolkit#1661 also depends on the driver.  - [X] The pull request only contains commits that are focused and relevant to this change. - [X] I have added appropriate tests that cover the new/changed functionality. - [X] I have updated the documentation to reflect these changes. - [x] I have added entries to the changelog for any noteworthy additions, changes, fixes, or removals. - [X] I have added migration instructions to the upgrade guide (if needed). - [X] The changes follow the project's style guidelines and introduce no new warnings. - [X] The changes are fully tested and pass the CI checks. - [X] I have reviewed my own code changes. **If PR contains AI-assisted content:** - [X] I have disclosed the use of AI tools in the PR description as per our [AI Usage Guidelines](https://github.com/munich-quantum-toolkit/core/blob/main/docs/ai_usage.md). - [X] AI-assisted commits include an `Assisted-by: [Model Name] via [Tool Name]` footer. - [X] I confirm that I have personally reviewed and understood all AI-generated content, and accept full responsibility for it. --------- Signed-off-by: burgholzer <burgholzer@me.com> Co-authored-by: Copilot <copilot@github.com> Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com> Co-authored-by: burgholzer <burgholzer@me.com>

… targets for component-based installs (munich-quantum-toolkit#1662) (munich-quantum-toolkit#1663) ## Description This PR fixes the problems observed with the 3.5.0 release while updating in dependent MQT repositories. There was a malformed include directory install command, that did not even turn out to be necessary (through local testing with QCEC, QMAP, and DDSIM). This is essentially the forward port of munich-quantum-toolkit#1662 and the `v3.5.1` release. ## Checklist  - [x] The pull request only contains commits that are focused and relevant to this change. - [x] I have added appropriate tests that cover the new/changed functionality. - [x] I have updated the documentation to reflect these changes. - [x] I have added entries to the changelog for any noteworthy additions, changes, fixes, or removals. - [x] I have added migration instructions to the upgrade guide (if needed). - [x] The changes follow the project's style guidelines and introduce no new warnings. - [x] The changes are fully tested and pass the CI checks. - [x] I have reviewed my own code changes. **If PR contains AI-assisted content:** - [x] I have disclosed the use of AI tools in the PR description as per our [AI Usage Guidelines](https://github.com/munich-quantum-toolkit/core/blob/main/docs/ai_usage.md). - [x] AI-assisted commits include an `Assisted-by: [Model Name] via [Tool Name]` footer. - [x] I confirm that I have personally reviewed and understood all AI-generated content, and accept full responsibility for it. --------- Signed-off-by: Lukas Burgholzer <burgholzer@me.com>

## Description This PR cleans up `llvm` includes by relying on [`mlir/Support/LLVM.h`](https://github.com/llvm/llvm-project/blob/main/mlir/include/mlir/Support/LLVM.h) as much as possible in header files. ## Checklist - [x] The pull request only contains commits that are focused and relevant to this change. - [x] ~~I have added appropriate tests that cover the new/changed functionality.~~ - [x] ~~I have updated the documentation to reflect these changes.~~ - [x] I have added entries to the changelog for any noteworthy additions, changes, fixes, or removals. - [x] ~~I have added migration instructions to the upgrade guide (if needed).~~ - [x] The changes follow the project's style guidelines and introduce no new warnings. - [x] The changes are fully tested and pass the CI checks. - [x] I have reviewed my own code changes. --------- Signed-off-by: burgholzer <burgholzer@me.com> Co-authored-by: burgholzer <burgholzer@me.com>

…#1675)

jmoosburger · 2026-04-30T17:30:52Z

i think, i need some help here °^^

rebase is complete and i did my best for a valid result, but there is still one test i cannot fix: Architectures/MappingPassTest.Sabre/RigettiNoveraArchitectures/MappingPassTest.Sabre/RigettiNovera
we used the method walkCircuitGraph() in the SwapAbsorbPass which is not available any more. it is replaced with walkProgramGraph, right? :)
as i am not deep enough in the code, i am not 100% confident i did everything right. can someone have a look at the changes here and verify them? 🙏

MatthiasReumann · 2026-05-04T07:17:53Z

i think, i need some help here °^^

Something seems to have gone very wrong with the rebase/merge here 😅. I took the liberty to open a fresh pull request (#1683) with the swap-absorption logic. Please sync your fork (always make sure your main is up-to-date!) and continue working on that branch / PR.

Furthermore, I have added a bunch of comments on the PR there, to guide you through the required next steps.

Again, thanks for working on this! 🚀

jmoosburger · 2026-05-04T08:59:10Z

that's absolutely fine! thanks for your help <3

MatthiasReumann and others added 2 commits April 17, 2026 18:43

Add SwapAbsorb pass

6026d16

fix build for test_drivers.cpp

4b315aa

jmoosburger changed the title ~~fix build for test_drivers.cpp~~ new pass SwapAbsorb Apr 23, 2026

jmoosburger changed the base branch from enh/swap-absorb to main April 23, 2026 06:33

🎨 pre-commit fixes

096e881

jmoosburger changed the base branch from main to enh/swap-absorb April 23, 2026 06:34

jmoosburger changed the base branch from enh/swap-absorb to main April 23, 2026 06:34

mergify Bot added the conflict label Apr 23, 2026

MatthiasReumann added c++ Anything related to C++ code MLIR Anything related to MLIR labels Apr 23, 2026

MatthiasReumann assigned jmoosburger and MatthiasReumann Apr 23, 2026

MatthiasReumann mentioned this pull request Apr 24, 2026

✨Add walkProgramGraph driver #1664

Merged

11 tasks

jmoosburger and others added 13 commits April 25, 2026 13:41

revert CompilerPipeline

eddce92

🔧 Maintenance round (munich-quantum-toolkit#1645)

2d04f32

🎨 Reduce sorting during QIR creation (munich-quantum-toolkit#1648)

0f63f41

denialhaag changed the title ~~new pass SwapAbsorb~~ ✨ Add -absorb-swaps pass Apr 28, 2026

J4MMlE and others added 12 commits April 30, 2026 19:01

⬆️🐍 Update dependency ty to v0.0.31 (munich-quantum-toolkit#1668)

8fc1e75

🎨 Remove remaining explicit llvm namespaces (munich-quantum-toolkit…

0e61f87

…#1675)

Add SwapAbsorb pass

041cbf9

🎨 pre-commit fixes

2ba14ae

revert CompilerPipeline

8fa9853

revert CompilerPipeline

cc46aa1

test_swap_absorb PassDoesNotChangeSwaplessProgram

7690f33

MatthiasReumann closed this May 4, 2026

mergify Bot removed the conflict label May 4, 2026

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