llvm/circt
Nov 2024 – Oct 2025
9 Months active
Languages Used
C++MLIRCMakePythonYAMLSystemVerilog
Technical Skills
Compiler DevelopmentIntermediate RepresentationLow-Level SystemsType ConversionDialect DesignMLIR
Morten Borup Petersen
PROFILE
Morten Borup Petersen
Morten worked on the llvm/circt repository, delivering features and fixes across hardware-software co-design, runtime systems, and build infrastructure. He implemented enhancements in C++ and Python, such as robust ESI runtime serialization, cross-platform build reliability, and improved cosimulation workflows. His work included API development for type-safe data modeling, canonicalization boundaries for safer pipeline transformations, and debugging support for hardware simulation. Morten addressed low-level challenges like bit manipulation and system integration, refactored dialects for maintainability, and improved Windows deployment. The depth of his contributions reflects a strong grasp of compiler development, runtime engineering, and cross-language interoperability in complex system environments.
Overall Statistics
Feature vs Bugs
76%Features
Repository Contributions
36Total
Bugs
5
Commits
36
Features
16
Lines of code
6,841
Activity Months9
Your Network
68 people
Work History
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.
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
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.
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.
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.
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
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.
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.
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.
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
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.
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.
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.
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
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.
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.
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.
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
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Quality Metrics
Correctness91.4%
Maintainability90.8%
Architecture89.0%
Performance80.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
C++CMakeMLIRPythonSystemVerilogYAML
Technical Skills
API DesignAPI DevelopmentBackend DevelopmentBit manipulationBuild System ConfigurationBuild SystemsC++C++ DevelopmentC++ Standard LibraryCI/CDCMakeCode OrganizationCode RefactoringCompiler DevelopmentConcurrency
Repositories Contributed To
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