llvm/circt
Nov 2024 – Jan 2026
12 Months active
Languages Used
C++MLIRCMakePythonYAMLSystemVerilog
Technical Skills
Compiler DevelopmentIntermediate RepresentationLow-Level SystemsType ConversionDialect DesignMLIR
Morten Borup Petersen
PROFILE
Morten Borup Petersen
Over twelve months, Morten B. Petersen contributed to the llvm/circt repository by developing and refining hardware-software co-design infrastructure, focusing on ESI runtime, cosimulation, and dialect optimization. He implemented robust RPC communication, enhanced type registration and serialization, and improved cross-platform build reliability using C++, Python, and CMake. Morten’s work included modularizing gRPC/protobuf dependencies, introducing canonicalization boundaries for safer pipeline transformations, and extending API usability for both C++ and Python users. His technical approach emphasized maintainability, error handling, and cross-language consistency, resulting in deeper reliability, easier debugging, and more flexible integration for distributed hardware simulation and software workflows.
Overall Statistics
Feature vs Bugs
81%Features
Repository Contributions
46Total
Bugs
5
Commits
46
Features
21
Lines of code
8,194
Activity Months12
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Work History
January 2026
2 Commits • 1 Features
Jan 1, 2026January 2026 monthly summary for llvm/circt focused on strengthening RPC reliability and disconnect handling to improve stability of distributed components and reduce downtime.
2 Commits • 1 Features
Jan 1, 2026January 2026 monthly summary for llvm/circt focused on strengthening RPC reliability and disconnect handling to improve stability of distributed components and reduce downtime.
January 2026
December 2025
7 Commits • 3 Features
Dec 1, 2025December 2025: Delivered foundational reliability and modularity improvements to Circt RPC infrastructure and cross-platform diagnostics. Key features include RpcServer enhancements for queryable port selection, support for manual connection methods, timeout-controlled stop/shutdown, and synchronization for RPC completion, along with CosimRpc library modularization to encapsulate gRPC/protobuf dependencies. Platform compatibility improvements added MSVC memory-alignment support and clearer error messages in type serialization/deserialization. These changes reduce pipeline fragility, enable better reuse across components, and speed issue diagnosis.
December 2025
7 Commits • 3 Features
Dec 1, 2025December 2025: Delivered foundational reliability and modularity improvements to Circt RPC infrastructure and cross-platform diagnostics. Key features include RpcServer enhancements for queryable port selection, support for manual connection methods, timeout-controlled stop/shutdown, and synchronization for RPC completion, along with CosimRpc library modularization to encapsulate gRPC/protobuf dependencies. Platform compatibility improvements added MSVC memory-alignment support and clearer error messages in type serialization/deserialization. These changes reduce pipeline fragility, enable better reuse across components, and speed issue diagnosis.
November 2025
1 Commits • 1 Features
Nov 1, 2025November 2025: Delivered ESI Type Registration Improvements in llvm/circt, focusing on clearer error handling for type registry aliasing and enhanced type printing to aid debugging and logging. The work improves reliability of the ESI type registry and accelerates issue diagnosis, with impact on developer productivity and maintainability.
1 Commits • 1 Features
Nov 1, 2025November 2025: Delivered ESI Type Registration Improvements in llvm/circt, focusing on clearer error handling for type registry aliasing and enhanced type printing to aid debugging and logging. The work improves reliability of the ESI type registry and accelerates issue diagnosis, with impact on developer productivity and maintainability.
November 2025
October 2025
3 Commits • 2 Features
Oct 1, 2025Month: 2025-10 — Circt (llvm/circt) development focused on co-simulation debugging and ESI data modeling. Delivered co-simulation debugging enhancements for Questa, enabling waveform generation when debugging is enabled, suppression of selected error codes during compilation, and support for custom simulator macros. Implemented ESI runtime data handling improvements with new arbitrary-width bitvector and integer classes to serialize/deserialize non-byte-aligned fields, plus an optional ArrayType reversal flag to control element order during serialization/deserialization. These changes improve debugging fidelity, reduce noise from non-critical errors, and extend data model support for hardware-software co-design.
October 2025
3 Commits • 2 Features
Oct 1, 2025Month: 2025-10 — Circt (llvm/circt) development focused on co-simulation debugging and ESI data modeling. Delivered co-simulation debugging enhancements for Questa, enabling waveform generation when debugging is enabled, suppression of selected error codes during compilation, and support for custom simulator macros. Implemented ESI runtime data handling improvements with new arbitrary-width bitvector and integer classes to serialize/deserialize non-byte-aligned fields, plus an optional ArrayType reversal flag to control element order during serialization/deserialization. These changes improve debugging fidelity, reduce noise from non-critical errors, and extend data model support for hardware-software co-design.
September 2025
15 Commits • 5 Features
Sep 1, 2025Summary for 2025-09: In llvm/circt, delivered foundational ESI runtime and SV/SystemVerilog enhancements, improved Windows reliability for ESI, and modernized the Cosim API and RTL path handling. Strengthened build system and maintenance tasks to support faster iteration and more robust deployments. These efforts delivered broader data-type support, more predictable cross-platform behavior, and improved library usability for users integrating ESI and Cosim flows.
15 Commits • 5 Features
Sep 1, 2025Summary for 2025-09: In llvm/circt, delivered foundational ESI runtime and SV/SystemVerilog enhancements, improved Windows reliability for ESI, and modernized the Cosim API and RTL path handling. Strengthened build system and maintenance tasks to support faster iteration and more robust deployments. These efforts delivered broader data-type support, more predictable cross-platform behavior, and improved library usability for users integrating ESI and Cosim flows.
September 2025
August 2025
1 Commits • 1 Features
Aug 1, 2025Concise monthly summary focused on delivering value and technical achievements for the month 2025-08 in the llvm/circt repository.
August 2025
1 Commits • 1 Features
Aug 1, 2025Concise monthly summary focused on delivering value and technical achievements for the month 2025-08 in the llvm/circt repository.
July 2025
10 Commits • 3 Features
Jul 1, 2025July 2025 -- Circt project: focused on delivering business-value features, hardening runtime safety, improving Python interop, and increasing CI/build reliability. Highlights include MessageData API enhancements with safer Python interop, safer Function invocation and argument handling, Python API acceleration exposure, improved Windows diagnostics, and CI/build reliability improvements (Python discovery, workflow_dispatch packages, MSVC flags, static zlib). These changes reduce runtime errors, accelerate Python workflows, ease debugging, and strengthen release reliability across platforms.
10 Commits • 3 Features
Jul 1, 2025July 2025 -- Circt project: focused on delivering business-value features, hardening runtime safety, improving Python interop, and increasing CI/build reliability. Highlights include MessageData API enhancements with safer Python interop, safer Function invocation and argument handling, Python API acceleration exposure, improved Windows diagnostics, and CI/build reliability improvements (Python discovery, workflow_dispatch packages, MSVC flags, static zlib). These changes reduce runtime errors, accelerate Python workflows, ease debugging, and strengthen release reliability across platforms.
July 2025
June 2025
2 Commits • 2 Features
Jun 1, 2025June 2025 monthly focus on feature delivery to strengthen IR canonicalization boundaries and improve cosimulation workflow in CIRCT. Implemented a canonicalization boundary via the pipeline.src operation to enable cross-block value referencing and safer retiming, and added a server-only cosimulation mode to the esi-cosim.py tool to support persistent debugging and external connections. These changes reduce cross-block canonicalization risks, preserve pipeline structures, and enhance debugging/integration capabilities for CIRCT users.
June 2025
2 Commits • 2 Features
Jun 1, 2025June 2025 monthly focus on feature delivery to strengthen IR canonicalization boundaries and improve cosimulation workflow in CIRCT. Implemented a canonicalization boundary via the pipeline.src operation to enable cross-block value referencing and safer retiming, and added a server-only cosimulation mode to the esi-cosim.py tool to support persistent debugging and external connections. These changes reduce cross-block canonicalization risks, preserve pipeline structures, and enhance debugging/integration capabilities for CIRCT users.
May 2025
1 Commits
May 1, 2025In May 2025, delivered a reliability improvement for the ESI runtime build within the llvm/circt repository. The fix ensures proper compilation and linking of the ESI C++ runtime by addressing a missing include in CMakeLists.txt and correcting a link scope from PRIVATE to PUBLIC, resulting in more stable builds and CI outcomes.
1 Commits
May 1, 2025In May 2025, delivered a reliability improvement for the ESI runtime build within the llvm/circt repository. The fix ensures proper compilation and linking of the ESI C++ runtime by addressing a missing include in CMakeLists.txt and correcting a link scope from PRIVATE to PUBLIC, resulting in more stable builds and CI outcomes.
May 2025
January 2025
2 Commits • 1 Features
Jan 1, 2025January 2025 monthly wrap-up for llvm/circt: Delivered improvements to pipeline design flexibility and dialect maintenance. Implemented an optional reset signal in pipeline operations, enabling alternate reset management and reducing reset-related overhead, while simplifying Kanagawa dialect by removing unused %this and ThisOp to cut dead patterns. Changes were shipped with targeted commits, emphasizing maintainability and synthesis/router friendliness where applicable.
January 2025
2 Commits • 1 Features
Jan 1, 2025January 2025 monthly wrap-up for llvm/circt: Delivered improvements to pipeline design flexibility and dialect maintenance. Implemented an optional reset signal in pipeline operations, enabling alternate reset management and reducing reset-related overhead, while simplifying Kanagawa dialect by removing unused %this and ThisOp to cut dead patterns. Changes were shipped with targeted commits, emphasizing maintainability and synthesis/router friendliness where applicable.
December 2024
1 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for llvm/circt: Delivered DC Dialect Optimization and a Join-on-Branch pattern by migrating fold methods to canonicalization patterns, re-enabling a suite of tests to validate and strengthen join handling, optimization capabilities, and overall correctness. Result: more robust join optimization, improved CIRCT performance characteristics, and a solid baseline for further canonicalization work.
1 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for llvm/circt: Delivered DC Dialect Optimization and a Join-on-Branch pattern by migrating fold methods to canonicalization patterns, re-enabling a suite of tests to validate and strengthen join handling, optimization capabilities, and overall correctness. Result: more robust join optimization, improved CIRCT performance characteristics, and a solid baseline for further canonicalization work.
December 2024
November 2024
1 Commits • 1 Features
Nov 1, 2024November 2024: Delivered DC dialect support for handshake packing/unpacking and introduced tuple-to-hw.struct conversion to enable pragmatic data representation within the DC dialect. Implemented lowering patterns for handshake.pack and handshake.unpack to DC, and added conversion patterns for PackOp and UnpackOp to manage data packing/unpacking using hw.struct. Refactored type conversion to handle tuples via hw.struct for better consistency and maintainability. This work establishes a solid foundation for improved interoperability between dialects and more efficient hardware representations.
November 2024
1 Commits • 1 Features
Nov 1, 2024November 2024: Delivered DC dialect support for handshake packing/unpacking and introduced tuple-to-hw.struct conversion to enable pragmatic data representation within the DC dialect. Implemented lowering patterns for handshake.pack and handshake.unpack to DC, and added conversion patterns for PackOp and UnpackOp to manage data packing/unpacking using hw.struct. Refactored type conversion to handle tuples via hw.struct for better consistency and maintainability. This work establishes a solid foundation for improved interoperability between dialects and more efficient hardware representations.
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Quality Metrics
Correctness91.6%
Maintainability89.4%
Architecture87.8%
Performance81.0%
AI Usage20.4%
Skills & Technologies
Programming Languages
C++CMakeMLIRPythonSystemVerilogYAML
Technical Skills
API DesignAPI DevelopmentBackend DevelopmentBackend developmentBit manipulationBuild System ConfigurationBuild SystemsC++C++ DevelopmentC++ Standard LibraryC++ developmentCI/CDCMakeCode OrganizationCode Refactoring
Repositories Contributed To
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