llvm/circt
Feb 2026 – Feb 2026
1 Month active
Languages Used
C++
Technical Skills
C++C++ developmentCompiler DesignDigital Logic Designlibrary managementsoftware engineering
Han Qi
PROFILE
Han Qi
Over a two-month period, this developer contributed to open-source hardware tooling by enhancing HDL conversion and improving parsing reliability. In the llvm/circt repository, they extended ImportVerilog to support library file enumeration and improved NetOp modeling, enabling more robust and flexible Verilog-to-IR flows using C++ and Yosys Script. Their work also included a targeted fix in YosysHQ/yosys, where they resolved a signal width parsing issue by aligning right-hand side widths with the left, preventing overflow and adding comprehensive edge-case tests. These contributions strengthened library management, formal verification, and the stability of end-to-end digital logic design pipelines.
Overall Statistics
Feature vs Bugs
50%Features
Repository Contributions
3Total
Bugs
1
Commits
3
Features
1
Lines of code
184
Activity Months2
Your Network
159 peopleShared Repositories
159
George RennieMember
Robert O'CallahanMember
RonxBulldMember
Robert O'CallahanMember
Aayush MainaliMember
tondapusiliMember
kamayMember
Adrien Prost-BoucleMember
Aritz ErkiagaMember
Work History
February 2026
2 Commits • 1 Features
Feb 1, 2026February 2026: llvm/circt monthly accomplishments focused on strengthening HDL conversion and NetOp modeling to improve reliability and throughput of the Verilog-to-IR flow.
2 Commits • 1 Features
Feb 1, 2026February 2026: llvm/circt monthly accomplishments focused on strengthening HDL conversion and NetOp modeling to improve reliability and throughput of the Verilog-to-IR flow.
February 2026
September 2025
1 Commits
Sep 1, 20252025-09 Monthly Summary: Delivered a critical signal width parsing fix in Yosys (repo: YosysHQ/yosys). The change aligns the right-hand side width to the left-hand side, preventing signal width overflow and improving parsing correctness. Included edge-case tests to ensure widths stay within expected limits, reducing regression risk for designs with wide vectors. Commit 11b829ba70f61a5c59abae8e4b6feec34000b74f: "fix(parse): #5234 adjust width of rhs according to lhs". Business impact includes more reliable synthesis results, fewer escalations due to width-related errors, and smoother downstream tooling integration.
September 2025
1 Commits
Sep 1, 20252025-09 Monthly Summary: Delivered a critical signal width parsing fix in Yosys (repo: YosysHQ/yosys). The change aligns the right-hand side width to the left-hand side, preventing signal width overflow and improving parsing correctness. Included edge-case tests to ensure widths stay within expected limits, reducing regression risk for designs with wide vectors. Commit 11b829ba70f61a5c59abae8e4b6feec34000b74f: "fix(parse): #5234 adjust width of rhs according to lhs". Business impact includes more reliable synthesis results, fewer escalations due to width-related errors, and smoother downstream tooling integration.
Activity
Loading activity data...
Quality Metrics
Correctness86.6%
Maintainability80.0%
Architecture73.4%
Performance73.4%
AI Usage26.6%
Skills & Technologies
Programming Languages
C++Yosys Script
Technical Skills
C++C++ developmentCompiler DesignDigital Logic DesignFormal VerificationTest Case DevelopmentVerilog Parsinglibrary managementsoftware engineering
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline
YosysHQ/yosys
Sep 2025 – Sep 2025
1 Month active
Languages Used
C++Yosys Script
Technical Skills
Formal VerificationTest Case DevelopmentVerilog Parsing